Linux Virtualization - Aug 2016 - [PATCH v8 06/18] ARM: STi: DT: STiH407: Add FDMA driver dt nodes.

Hi Vinod, Bjorn, Patrice,

This patchset adds support for the Flexible Direct Memory Access (FDMA) core
found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU
with a dedicated firmware. It is a general purpose DMA controller supporting
16 independent channels and data can be moved from memory to memory or between
memory and paced latency critical real time targets.

After quite a few review rounds, I'm hoping this series can get taken for
v4.9.

After some discussion with the DT maintainers I've removed the firmware
name from DT, and now generate the name based on the compatible string.

I've also dropped the dma xbar support for the moment, as I believe it
should be
re-worked based on some of the xbar API's that TI recently added.

V3 also included some updates to the ASoC st,sti-asoc-card.txt DT documentation
to make the doc align with the driver code. These patches have already been
applied
and are now dropped from this series. Other changes included enabling the ASoC
drivers
in multi_v7 defconfig and adding DT patches for Patrices STi DT tree to enable
ASoC
on STiH407/10 based platforms using the fdma driver.

v4 includes a new slim core rproc driver for loading the slim elf firmware. This
enables us to use the generic rproc elf loading code. This has deliberately not
been implemented as a platform_driver, to avoid having to have double mappings
of
I/O memory from two device drivers, and also to ensure that the DT node reflects
the actual hardware rather than Linux subsystems. The slim core is the basis
for various pieces of IP in STi chipsets and the intention is that other drivers
(e.g. demux) can also be migrated over to using the slim rproc for their
elf firmware loading and start/stop control.

v5 includes various updates from Bjorn related to the slim rproc implementation.
It also includes a patch to make rsc_table optional in remoteproc_core and
various
other cleanups and review feedback from Vinod to do with the actual fdma
implementation. It also fixes a regression introduced in v4 when all drivers are
built-in spotted by Aranud.

v6 goes back to having a dummy rsc_table and fixes some kbuild warnings. However
a change is still required in rproc core when all drivers are built-in as the
initial
async firmware resource table parsing can fail when built-in, which causes
subsequent calls
to rproc_boot() to also fail. V6 changes this behaviour to retry
rproc_fw_config_virtio()
from rproc_boot(), in cases where it previously failed, as at this point we know
the
irmwaref has been successfully obtained.

v7 removes all remoteproc core changes required to get -EPROBE_DEFER working
properly
when firmware resides on a rootfs and compiling as built-in. The fdma driver now
relies on
the firmware being available in the initramfs when building fdma as built-in.
This has
been tested and works well. If remoteproc subsystem implements a new mechanism
for
firmware on late mounted root filesystems, we can migrate this driver over to
use it
at that point.

v8 actions some review feedback from Bjorn to the slim rproc driver, and also
includes
a patch which fixes a recursive Kconfig error which is triggered when st_fdma
selects
slim_rproc driver. The series has also been rebased on v4.8-rc3.

regards,

Peter.

Changes since v7:
 - Rebase on v4.8-rc3 (Peter)
 - Double check that len is <= mem[i].size (Bjorn)
 - Remove if (!fw) checks (Bjorn)
 - Omit reference from fw_ops struct (Bjorn)
 - Call rproc_del() before rproc_put() (Bjorn)
 - Fix some odd line breaks (Bjorn)
 - Rename SLIM_* and slim_* with st prefix (Bjorn)

Changes since v6:
 - Fix recursive Kconfig warning (Patrice)
 - Fix various Intel zero day compiler warnings
 - Remove all changes related to late firmware load (now relies on initramfs)
(Peter)

Changes since v5:
 - Remove optional rsc table and go back to dummy resource table (Bjorn)
 - Retry rproc_fw_config_virtio() from rproc_boot() if previously failed (Peter)
 - Fixup some kbuild warnings
 - rebase on v4.7-rc5
 - Remove some patches which were merged via ASoC tree

Changes since v4:
 - Make rsc table optional in remoteproc (Peter)
 - Various fixups to STi audio DT nodes (Arnaud)
 - Bulk rename of xp70 to slim (Peter)
 - Update my email to @linaro.org (Lee)
 - rebase on v4.7-rc2 (Peter)
 - Don't make ST_SLIM_REMOTEPROC user selectable (Bjorn)
 - -EPROBE_DEFER if rproc_boot fails when allocating DMA channel (Arnaud /
Peter)
 - Drop some unnecessary headers (Vinod / Bjorn)
 - Change to writel now we have several mappings (Bjorn)
 - Remove io_res, rproc, and some unused structure fields / #define (Bjorn)
 - put clks in error path, also put clks before rproc_put() (Bjorn)
 - Make enum less generic (Bjorn)
 - Make slim_rproc_alloc() return a st_slim_rproc reference (Bjorn)
 - Alphabetical naming in Kconfig & Makefile (Vinod)
 - Add FDMA prefix to REQ_CTRL* (Vinod)
 - Print ret on some error paths (Vinod)
 - Add some acked-by (Peter)

Changes since v3:
 - Remove elf loading code from fdma driver (Vinod)
 - Remove fdma_ prefix for clock names (Arnd)
 - Make _xlate use dma_get_any_channel rather than request_channel (Arnd)
 - Make a common function for _prep_ routines (Vinod)
 - Make driver depend on COMPILE_TEST (Arnd)
 - Remove unnecessary st_fdma_filter_fn (Arnd)
 - Enable FDMA as a module (Arnd)
 - Drop fdma_ clock prefix (Arnd)
 - Fix description as well as example for st, prefix (Arnd)
 - Remove string concatenation from fdma register macros to ease
grep'ability (Arnd)
 - Add a XP70 rproc driver for ELF firmware loading and start/stop control
(Peter)
 - Add myself as a author of the driver (Peter)

Changes since v2:
 - Change to dma-controller (Arnd)
 - Remove platform data header file and simplifiy code (Arnd)
 - Remove FW_LOADER_USER_HELPER_FALLBACK and rework firmware loading to device
config (Vinod)
 - Use SET_RUNTIME_PM_OPS helpers (Vinod)
 - Remove fdma-id dt prop and use compatibles to generate different fdma
firmware names (Arnd / Lee)
 - Add sti-asoc-card DT nodes and pinmux config for uniperif player & reader
(Peter)
 - Update sti-asoc-card DT binding documentation (Peter)
 - Enable STi audio drivers in multi_v7_defconfig (Peter)

Changes since v1:
 - split into smaller patches for easier / faster review (Vinod)
 - new fill_hw_mode() with common code (Vinod)
 - new config_reqctrl() called from *_prep() instead of device_config cb (Vinod)
 - fdma-xbar support removed (Peter)
 - rework firmware name mechanism so fwname isn't in DT (Peter / Lee)
 - st_fdma_seg_to_mem can be static (Paul)
 - EXPORT_SYMBOL st_fdma_filter_fn not required (Paul)
 - s/channel/channels (vinod)
 - better describe "Must be <3>" (vinod)
 - sizeof(*ehdr) (vinod)
 - print values on error debug (vinod)
 - empty line (Vinod)
 - Update to -EIO (Vinod)
 - Make st_fdma tristate (Paul)
 - Remove __exit tag from .remove (Maxime)
 - Update MAINTAINERS rule to fdma* (Lee)
 - Unit address should match reg property (Lee)

Peter Griffin (18):
  remoteproc: st_slim_rproc: add a slimcore rproc driver
  MAINTAINERS: Add st slim core rproc driver to STi section.
  dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding
    documentation
  dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file
  dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support
  ARM: STi: DT: STiH407: Add FDMA driver dt nodes.
  MAINTAINERS: Add FDMA driver files to STi section.
  ARM: multi_v7_defconfig: Enable STi FDMA driver
  ARM: multi_v7_defconfig: Enable STi and simple-card drivers.
  ARM: DT: STiH407: Add i2s_out pinctrl configuration
  ARM: DT: STiH407: Add i2s_in pinctrl configuration
  ARM: DT: STiH407: Add spdif_out pinctrl config
  ARM: STi: DT: STiH407: Add sti-sasg-codec dt node
  ARM: STi: DT: STiH407: Add uniperif player dt nodes
  ARM: STi: DT: STiH407: Add uniperif reader dt nodes
  ARM: DT: STi: stihxxx-b2120: Add DT nodes for STi audio card
  drm/virtio: kconfig: Fix recursive dependency.
  drm/virtio: kconfig: Fixup white space.

 Documentation/devicetree/bindings/dma/st_fdma.txt |  87 +++
 MAINTAINERS                                       |   3 +
 arch/arm/boot/dts/stih407-family.dtsi             | 161 ++++
 arch/arm/boot/dts/stih407-pinctrl.dtsi            |  55 ++
 arch/arm/boot/dts/stihxxx-b2120.dtsi              |  45 ++
 arch/arm/configs/multi_v7_defconfig               |   4 +
 drivers/dma/Kconfig                               |  14 +-
 drivers/dma/Makefile                              |   1 +
 drivers/dma/st_fdma.c                             | 880 ++++++++++++++++++++++
 drivers/dma/st_fdma.h                             | 244 ++++++
 drivers/gpu/drm/virtio/Kconfig                    |   9 +-
 drivers/remoteproc/Kconfig                        |   8 +
 drivers/remoteproc/Makefile                       |   1 +
 drivers/remoteproc/st_slim_rproc.c                | 364 +++++++++
 include/linux/remoteproc/st_slim_rproc.h          |  53 ++
 15 files changed, 1924 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt
 create mode 100644 drivers/dma/st_fdma.c
 create mode 100644 drivers/dma/st_fdma.h
 create mode 100644 drivers/remoteproc/st_slim_rproc.c
 create mode 100644 include/linux/remoteproc/st_slim_rproc.h

-- 
1.9.1

slim core is used as a basis for many IPs in the STi
chipsets such as fdma and demux. To avoid duplicating
the elf loading code in each device driver a slim
rproc driver has been created.

This driver is designed to be used by other device drivers
such as fdma, or demux whose IP is based around a slim core.
The device driver can call slim_rproc_alloc() to allocate
a slim rproc and slim_rproc_put() when finished.

This driver takes care of ioremapping the slim
registers (dmem, imem, slimcore, peripherals), whose offsets
and sizes can change between IP's. It also obtains and enables
any clocks used by the device. This approach avoids having
a double mapping of the registers as slim_rproc does not register
its own platform device. It also maps well to device tree
abstraction as it allows us to have one dt node for the whole
device.

All of the generic rproc elf loading code can be reused, and
we provide start() stop() hooks to start and stop the slim
core once the firmware has been loaded. This has been tested
successfully with fdma driver.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 drivers/remoteproc/Kconfig               |   8 +
 drivers/remoteproc/Makefile              |   1 +
 drivers/remoteproc/st_slim_rproc.c       | 364 +++++++++++++++++++++++++++++++
 include/linux/remoteproc/st_slim_rproc.h |  53 +++++
 4 files changed, 426 insertions(+)
 create mode 100644 drivers/remoteproc/st_slim_rproc.c
 create mode 100644 include/linux/remoteproc/st_slim_rproc.h

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 1a8bf76a..06765e0 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -100,4 +100,12 @@ config ST_REMOTEPROC
 	  processor framework.
 	  This can be either built-in or a loadable module.
 
+config ST_SLIM_REMOTEPROC
+	tristate "ST Slim remoteproc support"
+	select REMOTEPROC
+	help
+	  Say y here to support firmware loading on IP based around
+	  the Slim core.
+	  If unsure say N.
+
 endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 92d3758..db1dae7 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
 obj-$(CONFIG_QCOM_MDT_LOADER)		+= qcom_mdt_loader.o
 obj-$(CONFIG_QCOM_Q6V5_PIL)		+= qcom_q6v5_pil.o
 obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
+obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
diff --git a/drivers/remoteproc/st_slim_rproc.c
b/drivers/remoteproc/st_slim_rproc.c
new file mode 100644
index 0000000..f4bf2d7
--- /dev/null
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -0,0 +1,364 @@
+/*
+ * st_slim_rproc.c
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ * Author: Peter Griffin <peter.griffin at linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "remoteproc_internal.h"
+
+/* slimcore registers */
+#define SLIM_ID_OFST		0x0
+#define SLIM_VER_OFST		0x4
+
+#define SLIM_EN_OFST		0x8
+#define SLIM_EN_RUN			BIT(0)
+
+#define SLIM_CLK_GATE_OFST	0xC
+#define SLIM_CLK_GATE_DIS		BIT(0)
+#define SLIM_CLK_GATE_RESET		BIT(2)
+
+#define SLIM_SLIM_PC_OFST	0x20
+
+/* dmem registers */
+#define SLIM_REV_ID_OFST	0x0
+#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
+#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
+#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
+#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)
+
+
+/* peripherals registers */
+#define SLIM_STBUS_SYNC_OFST	0xF88
+#define SLIM_STBUS_SYNC_DIS		BIT(0)
+
+#define SLIM_INT_SET_OFST	0xFD4
+#define SLIM_INT_CLR_OFST	0xFD8
+#define SLIM_INT_MASK_OFST	0xFDC
+
+#define SLIM_CMD_CLR_OFST	0xFC8
+#define SLIM_CMD_MASK_OFST	0xFCC
+
+static const char *mem_names[ST_SLIM_MEM_MAX] = {
+	[ST_SLIM_DMEM]	= "dmem",
+	[ST_SLIM_IMEM]	= "imem",
+};
+
+static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
+{
+	int clk, err;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
+		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
+		if (IS_ERR(slim_rproc->clks[clk])) {
+			err = PTR_ERR(slim_rproc->clks[clk]);
+			if (err == -EPROBE_DEFER)
+				goto err_put_clks;
+			slim_rproc->clks[clk] = NULL;
+			break;
+		}
+	}
+
+	return 0;
+
+err_put_clks:
+	while (--clk >= 0)
+		clk_put(slim_rproc->clks[clk]);
+
+	return err;
+}
+
+static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk];
clk++)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+}
+
+static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
+{
+	int clk, ret;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk];
clk++) {
+		ret = clk_prepare_enable(slim_rproc->clks[clk]);
+		if (ret)
+			goto err_disable_clks;
+	}
+
+	return 0;
+
+err_disable_clks:
+	while (--clk >= 0)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+
+	return ret;
+}
+
+/**
+ * Remoteproc slim specific device handlers
+ */
+static int slim_rproc_start(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	unsigned long hw_id, hw_ver, fw_rev;
+	u32 val;
+	int ret;
+
+	ret = slim_clk_enable(slim_rproc);
+	if (ret) {
+		dev_err(dev, "Failed to enable clocks\n");
+		return ret;
+	}
+
+	/* disable CPU pipeline clock & reset cpu pipeline */
+	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
+	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* disable SLIM core STBus sync */
+	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
+
+	/* enable cpu pipeline clock */
+	writel(!SLIM_CLK_GATE_DIS,
+		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* clear int & cmd mailbox */
+	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
+	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
+
+	/* enable all channels cmd & int */
+	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* enable cpu */
+	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
+	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
+
+	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
+			SLIM_REV_ID_OFST);
+
+	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
+		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
+		 hw_id, hw_ver);
+
+	return 0;
+}
+
+static int slim_rproc_stop(struct rproc *rproc)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	u32 val;
+
+	/* mask all (cmd & int) channels */
+	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* disable cpu pipeline clock */
+	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
+	if (val & SLIM_EN_RUN)
+		dev_warn(&rproc->dev, "Failed to disable SLIM");
+
+	slim_clk_disable(slim_rproc);
+
+	dev_dbg(&rproc->dev, "slim stopped\n");
+
+	return 0;
+}
+
+static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	void *va = NULL;
+	int i;
+
+	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
+		if (da != slim_rproc->mem[i].bus_addr)
+			continue;
+
+		if (len <= slim_rproc->mem[i].size) {
+			/* __force to make sparse happy with type conversion */
+			va = (__force void *)slim_rproc->mem[i].cpu_addr;
+			break;
+		}
+	}
+
+	dev_dbg(&rproc->dev, "%s: da = 0x%llx len = 0x%x va =
0x%p\n",
+		__func__, da, len, va);
+
+	return va;
+}
+
+static struct rproc_ops slim_rproc_ops = {
+	.start		= slim_rproc_start,
+	.stop		= slim_rproc_stop,
+	.da_to_va       = slim_rproc_da_to_va,
+};
+
+/**
+ * Firmware handler operations: sanity, boot address, load ...
+ */
+
+static struct resource_table empty_rsc_tbl = {
+	.ver = 1,
+	.num = 0,
+};
+
+static struct resource_table *slim_rproc_find_rsc_table(struct rproc *rproc,
+					       const struct firmware *fw,
+					       int *tablesz)
+{
+	*tablesz = sizeof(empty_rsc_tbl);
+	return &empty_rsc_tbl;
+}
+
+static struct rproc_fw_ops slim_rproc_fw_ops = {
+	.find_rsc_table = slim_rproc_find_rsc_table,
+};
+
+/**
+ * st_slim_rproc_alloc() - allocate and initialise slim rproc
+ * @pdev: Pointer to the platform_device struct
+ * @fw_name: Name of firmware for rproc to use
+ *
+ * Function for allocating and initialising a slim rproc for use by
+ * device drivers whose IP is based around the slim slim core. It
+ * obtains and enables any clocks required by the slim core and also
+ * ioremaps the various IO.
+ *
+ * Returns st_slim_rproc pointer or PTR_ERR() on error.
+ */
+
+struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
+				char *fw_name)
+{
+	struct device *dev = &pdev->dev;
+	struct st_slim_rproc *slim_rproc;
+	struct device_node *np = dev->of_node;
+	struct rproc *rproc;
+	struct resource *res;
+	int err, i;
+	const struct rproc_fw_ops *elf_ops;
+
+	if (WARN_ON(!np || !fw_name))
+		return ERR_PTR(-EINVAL);
+
+	if (!of_device_is_compatible(np, "st,slim-rproc"))
+		return ERR_PTR(-EINVAL);
+
+	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
+			fw_name, sizeof(*slim_rproc));
+	if (!rproc)
+		return ERR_PTR(-ENOMEM);
+
+	rproc->has_iommu = false;
+
+	slim_rproc = rproc->priv;
+	slim_rproc->rproc = rproc;
+
+	elf_ops = rproc->fw_ops;
+	/* Use some generic elf ops */
+	slim_rproc_fw_ops.load = elf_ops->load;
+	slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;
+
+	rproc->fw_ops = &slim_rproc_fw_ops;
+
+	/* get imem and dmem */
+	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
+
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						mem_names[i]);
+
+		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
+			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
+			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
+			goto err;
+		}
+		slim_rproc->mem[i].bus_addr = res->start;
+		slim_rproc->mem[i].size = resource_size(res);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"slimcore");
+
+	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->slimcore)) {
+		dev_err(&pdev->dev,
+			"devm_ioremap_resource failed for slimcore\n");
+		err = PTR_ERR(slim_rproc->slimcore);
+		goto err;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"peripherals");
+
+	slim_rproc->peri = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->peri)) {
+		dev_err(&pdev->dev, "devm_ioremap_resource failed for
peri\n");
+		err = PTR_ERR(slim_rproc->peri);
+		goto err;
+	}
+
+	err = slim_clk_get(slim_rproc, dev);
+	if (err)
+		goto err;
+
+	/* Register as a remoteproc device */
+	err = rproc_add(rproc);
+	if (err) {
+		dev_err(dev, "registration of slim remoteproc failed\n");
+		goto err_clk;
+	}
+
+	return slim_rproc;
+
+err_clk:
+	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
+		clk_put(slim_rproc->clks[i]);
+err:
+	rproc_put(rproc);
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL(st_slim_rproc_alloc);
+
+/**
+  * st_slim_rproc_put() - put slim rproc resources
+  * @slim_rproc: Pointer to the st_slim_rproc struct
+  *
+  * Function for calling respective _put() functions on
+  * slim_rproc resources.
+  *
+  */
+void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	if (!slim_rproc)
+		return;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk];
clk++)
+		clk_put(slim_rproc->clks[clk]);
+
+	rproc_del(slim_rproc->rproc);
+	rproc_put(slim_rproc->rproc);
+}
+EXPORT_SYMBOL(st_slim_rproc_put);
+
+MODULE_AUTHOR("Peter Griffin");
+MODULE_DESCRIPTION("STMicroelectronics SLIM rproc driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/remoteproc/st_slim_rproc.h
b/include/linux/remoteproc/st_slim_rproc.h
new file mode 100644
index 0000000..64a2c5b
--- /dev/null
+++ b/include/linux/remoteproc/st_slim_rproc.h
@@ -0,0 +1,53 @@
+/*
+ * st_slim_rproc.h
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ * Author: Peter Griffin <peter.griffin at linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#ifndef _ST_SLIM_H
+#define _ST_SLIM_H
+
+#define ST_SLIM_MEM_MAX 2
+#define ST_SLIM_MAX_CLK 4
+
+enum {
+	ST_SLIM_DMEM,
+	ST_SLIM_IMEM,
+};
+
+/**
+ * struct st_slim_mem - slim internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @size: Size of the memory region
+ */
+struct st_slim_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t bus_addr;
+	size_t size;
+};
+
+/**
+ * struct st_slim_rproc - SLIM slim core
+ * @rproc: rproc handle
+ * @mem: slim memory information
+ * @slimcore: slim slimcore regs
+ * @peri: slim peripheral regs
+ * @clks: slim clocks
+ */
+struct st_slim_rproc {
+	struct rproc *rproc;
+	struct st_slim_mem mem[ST_SLIM_MEM_MAX];
+	void __iomem *slimcore;
+	void __iomem *peri;
+
+	/* st_slim_rproc private */
+	struct clk *clks[ST_SLIM_MAX_CLK];
+};
+
+struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
+					char *fw_name);
+void st_slim_rproc_put(struct st_slim_rproc *slim_rproc);
+
+#endif
-- 
1.9.1

This patch adds the slim core rproc driver to the STi section
of the MAINTAINERS file.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 0bbe4b1..5dd3b24 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1749,6 +1749,7 @@ F:	drivers/phy/phy-stih407-usb.c
 F:	drivers/phy/phy-stih41x-usb.c
 F:	drivers/pinctrl/pinctrl-st.c
 F:	drivers/remoteproc/st_remoteproc.c
+F:	drivers/remoteproc/st_slim_rproc.c
 F:	drivers/reset/sti/
 F:	drivers/rtc/rtc-st-lpc.c
 F:	drivers/tty/serial/st-asc.c
@@ -1757,6 +1758,7 @@ F:	drivers/usb/host/ehci-st.c
 F:	drivers/usb/host/ohci-st.c
 F:	drivers/watchdog/st_lpc_wdt.c
 F:	drivers/ata/ahci_st.c
+F:	include/linux/remoteproc/st_slim_rproc.h
 
 ARM/STM32 ARCHITECTURE
 M:	Maxime Coquelin <mcoquelin.stm32 at gmail.com>
-- 
1.9.1

This patch adds the DT binding documentation for the FDMA constroller
found on STi based chipsets from STMicroelectronics.

Signed-off-by: Ludovic Barre <ludovic.barre at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
Acked-by: Rob Herring <robh at kernel.org>
---
 Documentation/devicetree/bindings/dma/st_fdma.txt | 87 +++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt

diff --git a/Documentation/devicetree/bindings/dma/st_fdma.txt
b/Documentation/devicetree/bindings/dma/st_fdma.txt
new file mode 100644
index 0000000..495d853
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/st_fdma.txt
@@ -0,0 +1,87 @@
+* STMicroelectronics Flexible Direct Memory Access Device Tree bindings
+
+The FDMA is a general-purpose direct memory access controller capable of
+supporting 16 independent DMA channels. It accepts up to 32 DMA requests.
+The FDMA is based on a Slim processor which requires a firmware.
+
+* FDMA Controller
+
+Required properties:
+- compatible	: Should be one of
+		 - st,stih407-fdma-mpe31-11, "st,slim-rproc";
+		 - st,stih407-fdma-mpe31-12, "st,slim-rproc";
+		 - st,stih407-fdma-mpe31-13, "st,slim-rproc";
+- reg		: Should contain an entry for each name in reg-names
+- reg-names	: Must contain "slimcore", "dmem",
"peripherals", "imem" entries
+- interrupts	: Should contain one interrupt shared by all channels
+- dma-channels	: Number of channels supported by the controller
+- #dma-cells	: Must be <3>. See DMA client section below
+- clocks	: Must contain an entry for each clock
+See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+
+Example:
+
+	fdma0: dma-controller at 8e20000 {
+		compatible = "st,stih407-fdma-mpe31-11", "st,slim-rproc";
+		reg = <0x8e20000 0x8000>,
+		      <0x8e30000 0x3000>,
+		      <0x8e37000 0x1000>,
+		      <0x8e38000 0x8000>;
+		reg-names = "slimcore", "dmem", "peripherals",
"imem";
+		clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+		interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
+		dma-channels = <16>;
+		#dma-cells = <3>;
+	};
+
+* DMA client
+
+Required properties:
+- dmas: Comma separated list of dma channel requests
+- dma-names: Names of the aforementioned requested channels
+
+Each dmas request consists of 4 cells:
+1. A phandle pointing to the FDMA controller
+2. The request line number
+3. A 32bit mask specifying (see include/linux/platform_data/dma-st-fdma.h)
+ -bit 2-0: Holdoff value, dreq will be masked for
+	0x0: 0-0.5us
+	0x1: 0.5-1us
+	0x2: 1-1.5us
+ -bit 17: data swap
+	0x0: disabled
+	0x1: enabled
+ -bit 21: Increment Address
+	0x0: no address increment between transfers
+	0x1: increment address between transfers
+ -bit 22: 2 STBus Initiator Coprocessor interface
+	0x0: high priority port
+	0x1: low priority port
+4. transfers type
+ 0 free running
+ 1 paced
+
+Example:
+
+	sti_uni_player2: sti-uni-player at 2 {
+		compatible = "st,sti-uni-player";
+		status = "disabled";
+		#sound-dai-cells = <0>;
+		st,syscfg = <&syscfg_core>;
+		clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+		assigned-clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+		assigned-clock-parents = <&clk_s_d0_quadfs 2>;
+		assigned-clock-rates = <50000000>;
+		reg = <0x8D82000 0x158>;
+		interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
+		dmas = <&fdma0 4 0 1>;
+		dai-name = "Uni Player #1 (DAC)";
+		dma-names = "tx";
+		st,uniperiph-id = <2>;
+		st,version = <5>;
+		st,mode = "PCM";
+	};
-- 
1.9.1

This header file will also be used by the dma xbar driver in the
future.

Signed-off-by: Ludovic Barre <ludovic.barre at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 drivers/dma/st_fdma.h | 244 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 244 insertions(+)
 create mode 100644 drivers/dma/st_fdma.h

diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h
new file mode 100644
index 0000000..16fa6f5
--- /dev/null
+++ b/drivers/dma/st_fdma.h
@@ -0,0 +1,244 @@
+/*
+ * st_fdma.h
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre at st.com>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#ifndef __DMA_ST_FDMA_H
+#define __DMA_ST_FDMA_H
+
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/io.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "virt-dma.h"
+
+#define ST_FDMA_NR_DREQS 32
+
+#define FW_NAME_SIZE 30
+
+/**
+ * struct st_fdma_generic_node - Free running/paced generic node
+ *
+ * @length: Length in bytes of a line in a 2D mem to mem
+ * @sstride: Stride, in bytes, between source lines in a 2D data move
+ * @dstride: Stride, in bytes, between destination lines in a 2D data move
+ */
+struct st_fdma_generic_node {
+	u32 length;
+	u32 sstride;
+	u32 dstride;
+};
+
+/**
+ * struct st_fdma_hw_node - Node structure used by fdma hw
+ *
+ * @next: Pointer to next node
+ * @control: Transfer Control Parameters
+ * @nbytes: Number of Bytes to read
+ * @saddr: Source address
+ * @daddr: Destination address
+ *
+ * @generic: generic node for free running/paced transfert type
+ * 2 others transfert type are possible, but not yet implemented
+ *
+ * The NODE structures must be aligned to a 32 byte boundary
+ */
+struct st_fdma_hw_node {
+	u32 next;
+	u32 control;
+	u32 nbytes;
+	u32 saddr;
+	u32 daddr;
+	union {
+		struct st_fdma_generic_node generic;
+	};
+} __aligned(32);
+
+/*
+ * node control parameters
+ */
+#define FDMA_NODE_CTRL_REQ_MAP_MASK	GENMASK(4, 0)
+#define FDMA_NODE_CTRL_REQ_MAP_FREE_RUN	0x0
+#define FDMA_NODE_CTRL_REQ_MAP_DREQ(n)	((n)&FDMA_NODE_CTRL_REQ_MAP_MASK)
+#define FDMA_NODE_CTRL_REQ_MAP_EXT		FDMA_NODE_CTRL_REQ_MAP_MASK
+#define FDMA_NODE_CTRL_SRC_MASK		GENMASK(6, 5)
+#define FDMA_NODE_CTRL_SRC_STATIC	BIT(5)
+#define FDMA_NODE_CTRL_SRC_INCR		BIT(6)
+#define FDMA_NODE_CTRL_DST_MASK		GENMASK(8, 7)
+#define FDMA_NODE_CTRL_DST_STATIC	BIT(7)
+#define FDMA_NODE_CTRL_DST_INCR		BIT(8)
+#define FDMA_NODE_CTRL_SECURE		BIT(15)
+#define FDMA_NODE_CTRL_PAUSE_EON	BIT(30)
+#define FDMA_NODE_CTRL_INT_EON		BIT(31)
+
+/**
+ * struct st_fdma_sw_node - descriptor structure for link list
+ *
+ * @pdesc: Physical address of desc
+ * @node: link used for putting this into a channel queue
+ */
+struct st_fdma_sw_node {
+	dma_addr_t pdesc;
+	struct st_fdma_hw_node *desc;
+};
+
+#define NAME_SZ 10
+
+struct st_fdma_driverdata {
+	u32 id;
+	char name[NAME_SZ];
+};
+
+struct st_fdma_desc {
+	struct virt_dma_desc vdesc;
+	struct st_fdma_chan *fchan;
+	bool iscyclic;
+	unsigned int n_nodes;
+	struct st_fdma_sw_node node[];
+};
+
+enum st_fdma_type {
+	ST_FDMA_TYPE_FREE_RUN,
+	ST_FDMA_TYPE_PACED,
+};
+
+struct st_fdma_cfg {
+	struct device_node *of_node;
+	enum st_fdma_type type;
+	dma_addr_t dev_addr;
+	enum dma_transfer_direction dir;
+	int req_line; /* request line */
+	long req_ctrl; /* Request control */
+};
+
+struct st_fdma_chan {
+	struct st_fdma_dev *fdev;
+	struct dma_pool *node_pool;
+	struct dma_slave_config scfg;
+	struct st_fdma_cfg cfg;
+
+	int dreq_line;
+
+	struct virt_dma_chan vchan;
+	struct st_fdma_desc *fdesc;
+	enum dma_status	status;
+};
+
+struct st_fdma_dev {
+	struct device *dev;
+	const struct st_fdma_driverdata *drvdata;
+	struct dma_device dma_device;
+
+	struct st_slim_rproc *slim_rproc;
+
+	int irq;
+
+	struct st_fdma_chan *chans;
+
+	spinlock_t dreq_lock;
+	unsigned long dreq_mask;
+
+	u32 nr_channels;
+	char fw_name[FW_NAME_SIZE];
+};
+
+/* Peripheral Registers*/
+
+#define FDMA_CMD_STA_OFST	0xFC0
+#define FDMA_CMD_SET_OFST	0xFC4
+#define FDMA_CMD_CLR_OFST	0xFC8
+#define FDMA_CMD_MASK_OFST	0xFCC
+#define FDMA_CMD_START(ch)		(0x1 << (ch << 1))
+#define FDMA_CMD_PAUSE(ch)		(0x2 << (ch << 1))
+#define FDMA_CMD_FLUSH(ch)		(0x3 << (ch << 1))
+
+#define FDMA_INT_STA_OFST	0xFD0
+#define FDMA_INT_STA_CH			0x1
+#define FDMA_INT_STA_ERR		0x2
+
+#define FDMA_INT_SET_OFST	0xFD4
+#define FDMA_INT_CLR_OFST	0xFD8
+#define FDMA_INT_MASK_OFST	0xFDC
+
+#define fdma_read(fdev, name) \
+	readl((fdev)->slim_rproc->peri + name)
+
+#define fdma_write(fdev, val, name) \
+	writel((val), (fdev)->slim_rproc->peri + name)
+
+/* fchan interface (dmem) */
+#define FDMA_CH_CMD_OFST	0x200
+#define FDMA_CH_CMD_STA_MASK		GENMASK(1, 0)
+#define FDMA_CH_CMD_STA_IDLE		(0x0)
+#define FDMA_CH_CMD_STA_START		(0x1)
+#define FDMA_CH_CMD_STA_RUNNING		(0x2)
+#define FDMA_CH_CMD_STA_PAUSED		(0x3)
+#define FDMA_CH_CMD_ERR_MASK		GENMASK(4, 2)
+#define FDMA_CH_CMD_ERR_INT		(0x0 << 2)
+#define FDMA_CH_CMD_ERR_NAND		(0x1 << 2)
+#define FDMA_CH_CMD_ERR_MCHI		(0x2 << 2)
+#define FDMA_CH_CMD_DATA_MASK		GENMASK(31, 5)
+#define fchan_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+#define fchan_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+/* req interface */
+#define FDMA_REQ_CTRL_OFST	0x240
+#define dreq_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ fchan->dreq_line * 0x04 \
+			+ name)
+/* node interface */
+#define FDMA_NODE_SZ 128
+#define FDMA_PTRN_OFST		0x800
+#define FDMA_CNTN_OFST		0x808
+#define FDMA_SADDRN_OFST	0x80c
+#define FDMA_DADDRN_OFST	0x810
+#define fnode_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+#define fnode_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+/*
+ * request control bits
+ */
+#define FDMA_REQ_CTRL_NUM_OPS_MASK	GENMASK(31, 24)
+#define FDMA_REQ_CTRL_NUM_OPS(n)	(FDMA_REQ_CTRL_NUM_OPS_MASK & \
+					((n) << 24))
+#define FDMA_REQ_CTRL_INITIATOR_MASK	BIT(22)
+#define FDMA_REQ_CTRL_INIT0		(0x0 << 22)
+#define FDMA_REQ_CTRL_INIT1		(0x1 << 22)
+#define FDMA_REQ_CTRL_INC_ADDR_ON	BIT(21)
+#define FDMA_REQ_CTRL_DATA_SWAP_ON	BIT(17)
+#define FDMA_REQ_CTRL_WNR		BIT(14)
+#define FDMA_REQ_CTRL_OPCODE_MASK	GENMASK(7, 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST1	(0x0 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST2	(0x1 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST4	(0x2 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST8	(0x3 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST16	(0x4 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST32	(0x5 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST64	(0x6 << 4)
+#define FDMA_REQ_CTRL_HOLDOFF_MASK	GENMASK(2, 0)
+#define FDMA_REQ_CTRL_HOLDOFF(n)	((n) & FDMA_REQ_CTRL_HOLDOFF_MASK)
+
+/* bits used by client to configure request control */
+#define FDMA_REQ_CTRL_CFG_MASK (FDMA_REQ_CTRL_HOLDOFF_MASK | \
+				FDMA_REQ_CTRL_DATA_SWAP_ON | \
+				FDMA_REQ_CTRL_INC_ADDR_ON | \
+				FDMA_REQ_CTRL_INITIATOR_MASK)
+
+#endif	/* __DMA_ST_FDMA_H */
-- 
1.9.1

This patch adds support for the Flexible Direct Memory Access (FDMA) core
driver. The FDMA is a slim core CPU with a dedicated firmware.
It is a general purpose DMA controller capable of supporting 16
independent DMA channels. Data moves maybe from memory to memory
or between memory and paced latency critical real time targets and it
is found on al STi based chipsets.

Signed-off-by: Ludovic Barre <ludovic.barre at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 drivers/dma/Kconfig   |  14 +-
 drivers/dma/Makefile  |   1 +
 drivers/dma/st_fdma.c | 880 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 894 insertions(+), 1 deletion(-)
 create mode 100644 drivers/dma/st_fdma.c

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 739f797..5b5a341 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -437,6 +437,19 @@ config STE_DMA40
 	help
 	  Support for ST-Ericsson DMA40 controller
 
+config ST_FDMA
+	tristate "ST FDMA dmaengine support"
+	depends on ARCH_STI
+	select ST_SLIM_REMOTEPROC
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Enable support for ST FDMA controller.
+	  It supports 16 independent DMA channels, accepts up to 32 DMA requests
+
+	  Say Y here if you have such a chipset.
+	  If unsure, say N.
+
 config STM32_DMA
 	bool "STMicroelectronics STM32 DMA support"
 	depends on ARCH_STM32
@@ -567,7 +580,6 @@ config ZX_DMA
 	help
 	  Support the DMA engine for ZTE ZX296702 platform devices.
 
-
 # driver files
 source "drivers/dma/bestcomm/Kconfig"
 
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index e4dc9ca..a4fa336 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_TI_DMA_CROSSBAR) += ti-dma-crossbar.o
 obj-$(CONFIG_TI_EDMA) += edma.o
 obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
 obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
+obj-$(CONFIG_ST_FDMA) += st_fdma.o
 
 obj-y += qcom/
 obj-y += xilinx/
diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c
new file mode 100644
index 0000000..bb8d8a7
--- /dev/null
+++ b/drivers/dma/st_fdma.c
@@ -0,0 +1,880 @@
+/*
+ * st_fdma.c
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre at st.com>
+ *	   Peter Griffin <peter.griffin at linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/remoteproc.h>
+
+#include "st_fdma.h"
+
+static inline struct st_fdma_chan *to_st_fdma_chan(struct dma_chan *c)
+{
+	return container_of(c, struct st_fdma_chan, vchan.chan);
+}
+
+static struct st_fdma_desc *to_st_fdma_desc(struct virt_dma_desc *vd)
+{
+	return container_of(vd, struct st_fdma_desc, vdesc);
+}
+
+static int st_fdma_dreq_get(struct st_fdma_chan *fchan)
+{
+	struct st_fdma_dev *fdev = fchan->fdev;
+	u32 req_line_cfg = fchan->cfg.req_line;
+	u32 dreq_line;
+	int try = 0;
+
+	/*
+	 * dreq_mask is shared for n channels of fdma, so all accesses must be
+	 * atomic. if the dreq_mask is changed between ffz and set_bit,
+	 * we retry
+	 */
+	do {
+		if (fdev->dreq_mask == ~0L) {
+			dev_err(fdev->dev, "No req lines available\n");
+			return -EINVAL;
+		}
+
+		if (try || req_line_cfg >= ST_FDMA_NR_DREQS) {
+			dev_err(fdev->dev, "Invalid or used req line\n");
+			return -EINVAL;
+		} else {
+			dreq_line = req_line_cfg;
+		}
+
+		try++;
+	} while (test_and_set_bit(dreq_line, &fdev->dreq_mask));
+
+	dev_dbg(fdev->dev, "get dreq_line:%d mask:%#lx\n",
+		dreq_line, fdev->dreq_mask);
+
+	return dreq_line;
+}
+
+static void st_fdma_dreq_put(struct st_fdma_chan *fchan)
+{
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	dev_dbg(fdev->dev, "put dreq_line:%#x\n", fchan->dreq_line);
+	clear_bit(fchan->dreq_line, &fdev->dreq_mask);
+}
+
+static void st_fdma_xfer_desc(struct st_fdma_chan *fchan)
+{
+	struct virt_dma_desc *vdesc;
+	unsigned long nbytes, ch_cmd, cmd;
+
+	vdesc = vchan_next_desc(&fchan->vchan);
+	if (!vdesc)
+		return;
+
+	fchan->fdesc = to_st_fdma_desc(vdesc);
+	nbytes = fchan->fdesc->node[0].desc->nbytes;
+	cmd = FDMA_CMD_START(fchan->vchan.chan.chan_id);
+	ch_cmd = fchan->fdesc->node[0].pdesc | FDMA_CH_CMD_STA_START;
+
+	/* start the channel for the descriptor */
+	fnode_write(fchan, nbytes, FDMA_CNTN_OFST);
+	fchan_write(fchan, ch_cmd, FDMA_CH_CMD_OFST);
+	writel(cmd,
+		fchan->fdev->slim_rproc->peri + FDMA_CMD_SET_OFST);
+
+	dev_dbg(fchan->fdev->dev, "start chan:%d\n",
fchan->vchan.chan.chan_id);
+}
+
+static void st_fdma_ch_sta_update(struct st_fdma_chan *fchan,
+				  unsigned long int_sta)
+{
+	unsigned long ch_sta, ch_err;
+	int ch_id = fchan->vchan.chan.chan_id;
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	ch_sta = fchan_read(fchan, FDMA_CH_CMD_OFST);
+	ch_err = ch_sta & FDMA_CH_CMD_ERR_MASK;
+	ch_sta &= FDMA_CH_CMD_STA_MASK;
+
+	if (int_sta & FDMA_INT_STA_ERR) {
+		dev_warn(fdev->dev, "chan:%d, error:%ld\n", ch_id, ch_err);
+		fchan->status = DMA_ERROR;
+		return;
+	}
+
+	switch (ch_sta) {
+	case FDMA_CH_CMD_STA_PAUSED:
+		fchan->status = DMA_PAUSED;
+		break;
+
+	case FDMA_CH_CMD_STA_RUNNING:
+		fchan->status = DMA_IN_PROGRESS;
+		break;
+	}
+}
+
+static irqreturn_t st_fdma_irq_handler(int irq, void *dev_id)
+{
+	struct st_fdma_dev *fdev = dev_id;
+	irqreturn_t ret = IRQ_NONE;
+	struct st_fdma_chan *fchan = &fdev->chans[0];
+	unsigned long int_sta, clr;
+
+	int_sta = fdma_read(fdev, FDMA_INT_STA_OFST);
+	clr = int_sta;
+
+	for (; int_sta != 0 ; int_sta >>= 2, fchan++) {
+		if (!(int_sta & (FDMA_INT_STA_CH | FDMA_INT_STA_ERR)))
+			continue;
+
+		spin_lock(&fchan->vchan.lock);
+		st_fdma_ch_sta_update(fchan, int_sta);
+
+		if (fchan->fdesc) {
+			if (!fchan->fdesc->iscyclic) {
+				list_del(&fchan->fdesc->vdesc.node);
+				vchan_cookie_complete(&fchan->fdesc->vdesc);
+				fchan->fdesc = NULL;
+				fchan->status = DMA_COMPLETE;
+			} else {
+				vchan_cyclic_callback(&fchan->fdesc->vdesc);
+			}
+
+			/* Start the next descriptor (if available) */
+			if (!fchan->fdesc)
+				st_fdma_xfer_desc(fchan);
+		}
+
+		spin_unlock(&fchan->vchan.lock);
+		ret = IRQ_HANDLED;
+	}
+
+	fdma_write(fdev, clr, FDMA_INT_CLR_OFST);
+
+	return ret;
+}
+
+static struct dma_chan *st_fdma_of_xlate(struct of_phandle_args *dma_spec,
+					 struct of_dma *ofdma)
+{
+	struct st_fdma_dev *fdev = ofdma->of_dma_data;
+	struct dma_chan *chan;
+	struct st_fdma_chan *fchan;
+	int ret;
+
+	if (dma_spec->args_count < 1)
+		return ERR_PTR(-EINVAL);
+
+	if (fdev->dma_device.dev->of_node != dma_spec->np)
+		return ERR_PTR(-EINVAL);
+
+	ret = rproc_boot(fdev->slim_rproc->rproc);
+	if (ret == -ENOENT)
+		return ERR_PTR(-EPROBE_DEFER);
+	else if (ret)
+		return ERR_PTR(ret);
+
+	chan = dma_get_any_slave_channel(&fdev->dma_device);
+	if (!chan)
+		goto err_chan;
+
+	fchan = to_st_fdma_chan(chan);
+
+	fchan->cfg.of_node = dma_spec->np;
+	fchan->cfg.req_line = dma_spec->args[0];
+	fchan->cfg.req_ctrl = 0;
+	fchan->cfg.type = ST_FDMA_TYPE_FREE_RUN;
+
+	if (dma_spec->args_count > 1)
+		fchan->cfg.req_ctrl = dma_spec->args[1]
+			& FDMA_REQ_CTRL_CFG_MASK;
+
+	if (dma_spec->args_count > 2)
+		fchan->cfg.type = dma_spec->args[2];
+
+	if (fchan->cfg.type == ST_FDMA_TYPE_FREE_RUN) {
+		fchan->dreq_line = 0;
+	} else {
+		fchan->dreq_line = st_fdma_dreq_get(fchan);
+		if (IS_ERR_VALUE(fchan->dreq_line)) {
+			chan = ERR_PTR(fchan->dreq_line);
+			goto err_chan;
+		}
+	}
+
+	dev_dbg(fdev->dev, "xlate req_line:%d type:%d req_ctrl:%#lx\n",
+		fchan->cfg.req_line, fchan->cfg.type, fchan->cfg.req_ctrl);
+
+	return chan;
+
+err_chan:
+	rproc_shutdown(fdev->slim_rproc->rproc);
+	return chan;
+
+}
+
+static void st_fdma_free_desc(struct virt_dma_desc *vdesc)
+{
+	struct st_fdma_desc *fdesc;
+	int i;
+
+	fdesc = to_st_fdma_desc(vdesc);
+	for (i = 0; i < fdesc->n_nodes; i++)
+		dma_pool_free(fdesc->fchan->node_pool, fdesc->node[i].desc,
+			      fdesc->node[i].pdesc);
+	kfree(fdesc);
+}
+
+static struct st_fdma_desc *st_fdma_alloc_desc(struct st_fdma_chan *fchan,
+					       int sg_len)
+{
+	struct st_fdma_desc *fdesc;
+	int i;
+
+	fdesc = kzalloc(sizeof(*fdesc) +
+			sizeof(struct st_fdma_sw_node) * sg_len, GFP_NOWAIT);
+	if (!fdesc)
+		return NULL;
+
+	fdesc->fchan = fchan;
+	fdesc->n_nodes = sg_len;
+	for (i = 0; i < sg_len; i++) {
+		fdesc->node[i].desc = dma_pool_alloc(fchan->node_pool,
+				GFP_NOWAIT, &fdesc->node[i].pdesc);
+		if (!fdesc->node[i].desc)
+			goto err;
+	}
+	return fdesc;
+
+err:
+	while (--i >= 0)
+		dma_pool_free(fchan->node_pool, fdesc->node[i].desc,
+			      fdesc->node[i].pdesc);
+	kfree(fdesc);
+	return NULL;
+}
+
+static int st_fdma_alloc_chan_res(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+	/* Create the dma pool for descriptor allocation */
+	fchan->node_pool = dma_pool_create(dev_name(&chan->dev->device),
+					    fchan->fdev->dev,
+					    sizeof(struct st_fdma_hw_node),
+					    __alignof__(struct st_fdma_hw_node),
+					    0);
+
+	if (!fchan->node_pool) {
+		dev_err(fchan->fdev->dev, "unable to allocate desc pool\n");
+		return -ENOMEM;
+	}
+
+	dev_dbg(fchan->fdev->dev, "alloc ch_id:%d type:%d\n",
+		fchan->vchan.chan.chan_id, fchan->cfg.type);
+
+	return 0;
+}
+
+static void st_fdma_free_chan_res(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	struct rproc *rproc = fchan->fdev->slim_rproc->rproc;
+	unsigned long flags;
+
+	LIST_HEAD(head);
+
+	dev_dbg(fchan->fdev->dev, "%s: freeing chan:%d\n",
+		__func__, fchan->vchan.chan.chan_id);
+
+	if (fchan->cfg.type != ST_FDMA_TYPE_FREE_RUN)
+		st_fdma_dreq_put(fchan);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	fchan->fdesc = NULL;
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	dma_pool_destroy(fchan->node_pool);
+	fchan->node_pool = NULL;
+	memset(&fchan->cfg, 0, sizeof(struct st_fdma_cfg));
+
+	rproc_shutdown(rproc);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_memcpy(
+	struct dma_chan *chan,	dma_addr_t dst, dma_addr_t src,
+	size_t len, unsigned long flags)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	struct st_fdma_hw_node *hw_node;
+
+	if (!len)
+		return NULL;
+
+	fchan = to_st_fdma_chan(chan);
+
+	/* We only require a single descriptor */
+	fdesc = st_fdma_alloc_desc(fchan, 1);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	hw_node = fdesc->node[0].desc;
+	hw_node->next = 0;
+	hw_node->control = FDMA_NODE_CTRL_REQ_MAP_FREE_RUN;
+	hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+	hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+	hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+	hw_node->nbytes = len;
+	hw_node->saddr = src;
+	hw_node->daddr = dst;
+	hw_node->generic.length = len;
+	hw_node->generic.sstride = 0;
+	hw_node->generic.dstride = 0;
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static int config_reqctrl(struct st_fdma_chan *fchan,
+			  enum dma_transfer_direction direction)
+{
+	u32 maxburst = 0, addr = 0;
+	enum dma_slave_buswidth width;
+	int ch_id = fchan->vchan.chan.chan_id;
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	switch (direction) {
+
+	case DMA_DEV_TO_MEM:
+		fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_WNR;
+		maxburst = fchan->scfg.src_maxburst;
+		width = fchan->scfg.src_addr_width;
+		addr = fchan->scfg.src_addr;
+		break;
+
+	case DMA_MEM_TO_DEV:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_WNR;
+		maxburst = fchan->scfg.dst_maxburst;
+		width = fchan->scfg.dst_addr_width;
+		addr = fchan->scfg.dst_addr;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_OPCODE_MASK;
+
+	switch (width) {
+
+	case DMA_SLAVE_BUSWIDTH_1_BYTE:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST1;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_2_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST2;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_4_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST4;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_8_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST8;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_NUM_OPS_MASK;
+	fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_NUM_OPS(maxburst-1);
+	dreq_write(fchan, fchan->cfg.req_ctrl, FDMA_REQ_CTRL_OFST);
+
+	fchan->cfg.dev_addr = addr;
+	fchan->cfg.dir = direction;
+
+	dev_dbg(fdev->dev, "chan:%d config_reqctrl:%#x req_ctrl:%#lx\n",
+		ch_id, addr, fchan->cfg.req_ctrl);
+
+	return 0;
+}
+
+static void fill_hw_node(struct st_fdma_hw_node *hw_node,
+			struct st_fdma_chan *fchan,
+			enum dma_transfer_direction direction)
+{
+	if (direction == DMA_MEM_TO_DEV) {
+		hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+		hw_node->control |= FDMA_NODE_CTRL_DST_STATIC;
+		hw_node->daddr = fchan->cfg.dev_addr;
+	} else {
+		hw_node->control |= FDMA_NODE_CTRL_SRC_STATIC;
+		hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+		hw_node->saddr = fchan->cfg.dev_addr;
+	}
+
+	hw_node->generic.sstride = 0;
+	hw_node->generic.dstride = 0;
+}
+
+static inline struct st_fdma_chan *st_fdma_prep_common(struct dma_chan *chan,
+		size_t len, enum dma_transfer_direction direction)
+{
+	struct st_fdma_chan *fchan;
+
+	if (!chan || !len)
+		return NULL;
+
+	fchan = to_st_fdma_chan(chan);
+
+	if (!is_slave_direction(direction)) {
+		dev_err(fchan->fdev->dev, "bad direction?\n");
+		return NULL;
+	}
+
+	return fchan;
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_cyclic(
+		struct dma_chan *chan, dma_addr_t buf_addr, size_t len,
+		size_t period_len, enum dma_transfer_direction direction,
+		unsigned long flags)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	int sg_len, i;
+
+	fchan = st_fdma_prep_common(chan, len, direction);
+	if (!fchan)
+		return NULL;
+
+	if (!period_len)
+		return NULL;
+
+	if (config_reqctrl(fchan, direction)) {
+		dev_err(fchan->fdev->dev, "bad width or direction\n");
+		return NULL;
+	}
+
+	/* the buffer length must be a multiple of period_len */
+	if (len % period_len != 0) {
+		dev_err(fchan->fdev->dev, "len is not multiple of period\n");
+		return NULL;
+	}
+
+	sg_len = len / period_len;
+	fdesc = st_fdma_alloc_desc(fchan, sg_len);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	fdesc->iscyclic = true;
+
+	for (i = 0; i < sg_len; i++) {
+		struct st_fdma_hw_node *hw_node = fdesc->node[i].desc;
+
+		hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+
+		hw_node->control +			FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+		hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+		fill_hw_node(hw_node, fchan, direction);
+
+		if (direction == DMA_MEM_TO_DEV)
+			hw_node->saddr = buf_addr + (i * period_len);
+		else
+			hw_node->daddr = buf_addr + (i * period_len);
+
+		hw_node->nbytes = period_len;
+		hw_node->generic.length = period_len;
+	}
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_slave_sg(
+		struct dma_chan *chan, struct scatterlist *sgl,
+		unsigned int sg_len, enum dma_transfer_direction direction,
+		unsigned long flags, void *context)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	struct st_fdma_hw_node *hw_node;
+	struct scatterlist *sg;
+	int i;
+
+	fchan = st_fdma_prep_common(chan, sg_len, direction);
+	if (!fchan)
+		return NULL;
+
+	if (!sgl)
+		return NULL;
+
+	fdesc = st_fdma_alloc_desc(fchan, sg_len);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	fdesc->iscyclic = false;
+
+	for_each_sg(sgl, sg, sg_len, i) {
+		hw_node = fdesc->node[i].desc;
+
+		hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+		hw_node->control = FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+
+		fill_hw_node(hw_node, fchan, direction);
+
+		if (direction == DMA_MEM_TO_DEV)
+			hw_node->saddr = sg_dma_address(sg);
+		else
+			hw_node->daddr = sg_dma_address(sg);
+
+		hw_node->nbytes = sg_dma_len(sg);
+		hw_node->generic.length = sg_dma_len(sg);
+	}
+
+	/* interrupt at end of last node */
+	hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static size_t st_fdma_desc_residue(struct st_fdma_chan *fchan,
+				   struct virt_dma_desc *vdesc,
+				   bool in_progress)
+{
+	struct st_fdma_desc *fdesc = fchan->fdesc;
+	size_t residue = 0;
+	dma_addr_t cur_addr = 0;
+	int i;
+
+	if (in_progress) {
+		cur_addr = fchan_read(fchan, FDMA_CH_CMD_OFST);
+		cur_addr &= FDMA_CH_CMD_DATA_MASK;
+	}
+
+	for (i = fchan->fdesc->n_nodes - 1 ; i >= 0; i--) {
+		if (cur_addr == fdesc->node[i].pdesc) {
+			residue += fnode_read(fchan, FDMA_CNTN_OFST);
+			break;
+		}
+		residue += fdesc->node[i].desc->nbytes;
+	}
+
+	return residue;
+}
+
+static enum dma_status st_fdma_tx_status(struct dma_chan *chan,
+					 dma_cookie_t cookie,
+					 struct dma_tx_state *txstate)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	struct virt_dma_desc *vd;
+	enum dma_status ret;
+	unsigned long flags;
+
+	ret = dma_cookie_status(chan, cookie, txstate);
+	if (ret == DMA_COMPLETE || !txstate)
+		return ret;
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	vd = vchan_find_desc(&fchan->vchan, cookie);
+	if (fchan->fdesc && cookie == fchan->fdesc->vdesc.tx.cookie)
+		txstate->residue = st_fdma_desc_residue(fchan, vd, true);
+	else if (vd)
+		txstate->residue = st_fdma_desc_residue(fchan, vd, false);
+	else
+		txstate->residue = 0;
+
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return ret;
+}
+
+static void st_fdma_issue_pending(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	unsigned long flags;
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+
+	if (vchan_issue_pending(&fchan->vchan) && !fchan->fdesc)
+		st_fdma_xfer_desc(fchan);
+
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+}
+
+static int st_fdma_pause(struct dma_chan *chan)
+{
+	unsigned long flags;
+	LIST_HEAD(head);
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+	unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+	dev_dbg(fchan->fdev->dev, "pause chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	if (fchan->fdesc)
+		fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return 0;
+}
+
+static int st_fdma_resume(struct dma_chan *chan)
+{
+	unsigned long flags;
+	unsigned long val;
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+
+	dev_dbg(fchan->fdev->dev, "resume chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	if (fchan->fdesc) {
+		val = fchan_read(fchan, FDMA_CH_CMD_OFST);
+		val &= FDMA_CH_CMD_DATA_MASK;
+		fchan_write(fchan, val, FDMA_CH_CMD_OFST);
+	}
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return 0;
+}
+
+static int st_fdma_terminate_all(struct dma_chan *chan)
+{
+	unsigned long flags;
+	LIST_HEAD(head);
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+	unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+	dev_dbg(fchan->fdev->dev, "terminate chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+	fchan->fdesc = NULL;
+	vchan_get_all_descriptors(&fchan->vchan, &head);
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+	vchan_dma_desc_free_list(&fchan->vchan, &head);
+
+	return 0;
+}
+
+static int st_fdma_slave_config(struct dma_chan *chan,
+				struct dma_slave_config *slave_cfg)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+	memcpy(&fchan->scfg, slave_cfg, sizeof(fchan->scfg));
+	return 0;
+}
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_11 = {
+	.name = "STiH407",
+	.id = 0,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_12 = {
+	.name = "STiH407",
+	.id = 1,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_13 = {
+	.name = "STiH407",
+	.id = 2,
+};
+
+static const struct of_device_id st_fdma_match[] = {
+	{ .compatible = "st,stih407-fdma-mpe31-11"
+	  , .data = &fdma_mpe31_stih407_11 },
+	{ .compatible = "st,stih407-fdma-mpe31-12"
+	  , .data = &fdma_mpe31_stih407_12 },
+	{ .compatible = "st,stih407-fdma-mpe31-13"
+	  , .data = &fdma_mpe31_stih407_13 },
+	{},
+};
+MODULE_DEVICE_TABLE(of, st_fdma_match);
+
+static int st_fdma_parse_dt(struct platform_device *pdev,
+			const struct st_fdma_driverdata *drvdata,
+			struct st_fdma_dev *fdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	if (!np)
+		goto err;
+
+	ret = of_property_read_u32(np, "dma-channels",
&fdev->nr_channels);
+	if (ret)
+		goto err;
+
+	snprintf(fdev->fw_name, FW_NAME_SIZE, "fdma_%s_%d.elf",
+		drvdata->name, drvdata->id);
+
+err:
+	return ret;
+}
+#define FDMA_DMA_BUSWIDTHS	(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
+
+static int st_fdma_probe(struct platform_device *pdev)
+{
+	struct st_fdma_dev *fdev;
+	const struct of_device_id *match;
+	struct device_node *np = pdev->dev.of_node;
+	const struct st_fdma_driverdata *drvdata;
+	int ret, i;
+
+	match = of_match_device((st_fdma_match), &pdev->dev);
+	if (!match || !match->data) {
+		dev_err(&pdev->dev, "No device match found\n");
+		return -ENODEV;
+	}
+
+	drvdata = match->data;
+
+	fdev = devm_kzalloc(&pdev->dev, sizeof(*fdev), GFP_KERNEL);
+	if (!fdev)
+		return -ENOMEM;
+
+	ret = st_fdma_parse_dt(pdev, drvdata, fdev);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to find platform data\n");
+		goto err;
+	}
+
+	fdev->chans = devm_kzalloc(&pdev->dev,
+				   fdev->nr_channels
+				   * sizeof(struct st_fdma_chan), GFP_KERNEL);
+	if (!fdev->chans)
+		return -ENOMEM;
+
+	fdev->dev = &pdev->dev;
+	fdev->drvdata = drvdata;
+	platform_set_drvdata(pdev, fdev);
+
+	fdev->irq = platform_get_irq(pdev, 0);
+	if (fdev->irq < 0) {
+		dev_err(&pdev->dev, "Failed to get irq resource\n");
+		return -EINVAL;
+	}
+
+	ret = devm_request_irq(&pdev->dev, fdev->irq, st_fdma_irq_handler,
0,
+			       dev_name(&pdev->dev), fdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to request irq (%d)\n", ret);
+		goto err;
+	}
+
+	fdev->slim_rproc = st_slim_rproc_alloc(pdev, fdev->fw_name);
+	if (!fdev->slim_rproc) {
+		ret = PTR_ERR(fdev->slim_rproc);
+		dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n", ret);
+		goto err;
+	}
+
+	/* Initialise list of FDMA channels */
+	INIT_LIST_HEAD(&fdev->dma_device.channels);
+	for (i = 0; i < fdev->nr_channels; i++) {
+		struct st_fdma_chan *fchan = &fdev->chans[i];
+
+		fchan->fdev = fdev;
+		fchan->vchan.desc_free = st_fdma_free_desc;
+		vchan_init(&fchan->vchan, &fdev->dma_device);
+	}
+
+	/* Initialise the FDMA dreq (reserve 0 & 31 for FDMA use) */
+	fdev->dreq_mask = BIT(0) | BIT(31);
+
+	dma_cap_set(DMA_SLAVE, fdev->dma_device.cap_mask);
+	dma_cap_set(DMA_CYCLIC, fdev->dma_device.cap_mask);
+	dma_cap_set(DMA_MEMCPY, fdev->dma_device.cap_mask);
+
+	fdev->dma_device.dev = &pdev->dev;
+	fdev->dma_device.device_alloc_chan_resources = st_fdma_alloc_chan_res;
+	fdev->dma_device.device_free_chan_resources = st_fdma_free_chan_res;
+	fdev->dma_device.device_prep_dma_cyclic	= st_fdma_prep_dma_cyclic;
+	fdev->dma_device.device_prep_slave_sg = st_fdma_prep_slave_sg;
+	fdev->dma_device.device_prep_dma_memcpy = st_fdma_prep_dma_memcpy;
+	fdev->dma_device.device_tx_status = st_fdma_tx_status;
+	fdev->dma_device.device_issue_pending = st_fdma_issue_pending;
+	fdev->dma_device.device_terminate_all = st_fdma_terminate_all;
+	fdev->dma_device.device_config = st_fdma_slave_config;
+	fdev->dma_device.device_pause = st_fdma_pause;
+	fdev->dma_device.device_resume = st_fdma_resume;
+
+	fdev->dma_device.src_addr_widths = FDMA_DMA_BUSWIDTHS;
+	fdev->dma_device.dst_addr_widths = FDMA_DMA_BUSWIDTHS;
+	fdev->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+	fdev->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
+	ret = dma_async_device_register(&fdev->dma_device);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to register DMA device (%d)\n", ret);
+		goto err_rproc;
+	}
+
+	ret = of_dma_controller_register(np, st_fdma_of_xlate, fdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to register controller (%d)\n", ret);
+		goto err_dma_dev;
+	}
+
+	dev_info(&pdev->dev, "ST FDMA engine driver, irq:%d\n",
fdev->irq);
+
+	return 0;
+
+err_dma_dev:
+	dma_async_device_unregister(&fdev->dma_device);
+err_rproc:
+	st_slim_rproc_put(fdev->slim_rproc);
+err:
+	return ret;
+}
+
+static int st_fdma_remove(struct platform_device *pdev)
+{
+	struct st_fdma_dev *fdev = platform_get_drvdata(pdev);
+
+	devm_free_irq(&pdev->dev, fdev->irq, fdev);
+	st_slim_rproc_put(fdev->slim_rproc);
+	of_dma_controller_free(pdev->dev.of_node);
+	dma_async_device_unregister(&fdev->dma_device);
+
+	return 0;
+}
+
+static struct platform_driver st_fdma_platform_driver = {
+	.driver = {
+		.name = "st-fdma",
+		.of_match_table = st_fdma_match,
+	},
+	.probe = st_fdma_probe,
+	.remove = st_fdma_remove,
+};
+module_platform_driver(st_fdma_platform_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMicroelectronics FDMA engine driver");
+MODULE_AUTHOR("Ludovic.barre <Ludovic.barre at st.com>");
+MODULE_AUTHOR("Peter Griffin <peter.griffin at linaro.org>");
-- 
1.9.1

These nodes are required to get the fdma driver working
on STiH407 based silicon.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 52 +++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
index d294e82..45cab30 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -821,5 +821,57 @@
 			clock-frequency	= <600000000>;
 			st,syscfg	= <&syscfg_core 0x224>;
 		};
+
+		/* fdma audio */
+		fdma0: dma-controller at 8e20000 {
+			compatible = "st,stih407-fdma-mpe31-11",
"st,slim-rproc";
+			reg = <0x8e20000 0x8000>,
+			      <0x8e30000 0x3000>,
+			      <0x8e37000 0x1000>,
+			      <0x8e38000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals",
"imem";
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+			interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+		};
+
+		/* fdma app */
+		fdma1: dma-controller at 8e40000 {
+			compatible = "st,stih407-fdma-mpe31-12",
"st,slim-rproc";
+			reg = <0x8e40000 0x8000>,
+			      <0x8e50000 0x3000>,
+			      <0x8e57000 0x1000>,
+			      <0x8e58000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals",
"imem";
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
+
+			interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+		};
+
+		/* fdma free running */
+		fdma2: dma-controller at 8e60000 {
+			compatible = "st,stih407-fdma-mpe31-13",
"st,slim-rproc";
+			reg = <0x8e60000 0x8000>,
+			      <0x8e70000 0x3000>,
+			      <0x8e77000 0x1000>,
+			      <0x8e78000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals",
"imem";
+			interrupts = <GIC_SPI 9 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
+		};
 	};
 };
-- 
1.9.1

This patch adds the FDMA driver files to the STi
section of the maintainers file.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
Acked-by: Lee Jones <lee.jones at linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 5dd3b24..d21a7b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1739,6 +1739,7 @@ F:	drivers/char/hw_random/st-rng.c
 F:	drivers/clocksource/arm_global_timer.c
 F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/cpufreq/sti-cpufreq.c
+F:	drivers/dma/st_fdma*
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/media/platform/sti/c8sectpfe/
-- 
1.9.1

This DMA controller is found on all STi chipsets.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
Acked-by: Lee Jones <lee.jones at linaro.org>
---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig
b/arch/arm/configs/multi_v7_defconfig
index ea23250..998578a 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -784,6 +784,7 @@ CONFIG_DMA_OMAP=y
 CONFIG_QCOM_BAM_DMA=y
 CONFIG_XILINX_VDMA=y
 CONFIG_DMA_SUN6I=y
+CONFIG_ST_FDMA=m
 CONFIG_STAGING=y
 CONFIG_SENSORS_ISL29018=y
 CONFIG_SENSORS_ISL29028=y
-- 
1.9.1

This patch enables the STi ALSA drivers found on STi platforms
as well as the simple-card driver which is a dependency to have
working sound.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
Cc: arnaud.pouliquen at st.com
Cc: broonie at kernel.org
---
 arch/arm/configs/multi_v7_defconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/configs/multi_v7_defconfig
b/arch/arm/configs/multi_v7_defconfig
index 998578a..51a38b1 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -644,6 +644,9 @@ CONFIG_SND_SOC_AK4642=m
 CONFIG_SND_SOC_SGTL5000=m
 CONFIG_SND_SOC_SPDIF=m
 CONFIG_SND_SOC_WM8978=m
+CONFIG_SND_SOC_STI=m
+CONFIG_SND_SOC_STI_SAS=m
+CONFIG_SND_SIMPLE_CARD=m
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_MVEBU=y
-- 
1.9.1

This patch adds the pinctrl config for the i2s_out pins
used by the uniperif player IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index a538ae5..0fb5c8a 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1067,6 +1067,29 @@
 				};
 			};
 
+			i2s_out {
+				pinctrl_i2s_8ch_out: i2s_8ch_out{
+					st,pins {
+						mclk = <&pio33 5 ALT1 OUT>;
+						lrclk = <&pio33 7 ALT1 OUT>;
+						sclk = <&pio33 6 ALT1 OUT>;
+						data0 = <&pio33 4 ALT1 OUT>;
+						data1 = <&pio34 0 ALT1 OUT>;
+						data2 = <&pio34 1 ALT1 OUT>;
+						data3 = <&pio34 2 ALT1 OUT>;
+					};
+				};
+
+				pinctrl_i2s_2ch_out: i2s_2ch_out{
+					st,pins {
+						mclk = <&pio33 5 ALT1 OUT>;
+						lrclk = <&pio33 7 ALT1 OUT>;
+						sclk = <&pio33 6 ALT1 OUT>;
+						data0 = <&pio33 4 ALT1 OUT>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

This patch adds the pinctrl config for the i2s_in pins
used by the uniperif reader IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index 0fb5c8a..537db7e 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1090,6 +1090,30 @@
 				};
 			};
 
+			i2s_in {
+				pinctrl_i2s_8ch_in: i2s_8ch_in{
+					st,pins {
+						mclk = <&pio32 5 ALT1 IN>;
+						lrclk = <&pio32 7 ALT1 IN>;
+						sclk = <&pio32 6 ALT1 IN>;
+						data0 = <&pio32 4 ALT1 IN>;
+						data1 = <&pio33 0 ALT1 IN>;
+						data2 = <&pio33 1 ALT1 IN>;
+						data3 = <&pio33 2 ALT1 IN>;
+						data4 = <&pio33 3 ALT1 IN>;
+					};
+				};
+
+				pinctrl_i2s_2ch_in: i2s_2ch_in{
+					st,pins {
+						mclk = <&pio32 5 ALT1 IN>;
+						lrclk = <&pio32 7 ALT1 IN>;
+						sclk = <&pio32 6 ALT1 IN>;
+						data0 = <&pio32 4 ALT1 IN>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

This patch adds the pinctrl config for the spidf out
pins used by the sasg codec IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index 537db7e..598dbab 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1114,6 +1114,14 @@
 				};
 			};
 
+			spdif_out {
+				pinctrl_spdif_out: spdif_out{
+					st,pins {
+						spdif_out = <&pio34 7 ALT1 OUT>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

This patch adds the dt node for the internal audio
codec IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
index 45cab30..d1258d5 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -873,5 +873,12 @@
 				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
 				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
 		};
+
+		sti_sasg_codec: sti-sasg-codec {
+			compatible = "st,stih407-sas-codec";
+			#sound-dai-cells = <1>;
+			status = "disabled";
+			st,syscfg = <&syscfg_core>;
+		};
 	};
 };
-- 
1.9.1

This patch adds the DT nodes for the uniperif player
IP blocks found on STiH407 family silicon.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 76 +++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
index d1258d5..d263c96 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -880,5 +880,81 @@
 			status = "disabled";
 			st,syscfg = <&syscfg_core>;
 		};
+
+		sti_uni_player0: sti-uni-player at 0 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_0>;
+			assigned-clocks = <&clk_s_d0_quadfs 0>, <&clk_s_d0_flexgen
CLK_PCM_0>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 0>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D80000 0x158>;
+			interrupts = <GIC_SPI 84 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 2 0 1>;
+			dai-name = "Uni Player #0 (HDMI)";
+			dma-names = "tx";
+			st,uniperiph-id = <0>;
+			st,version = <5>;
+			st,mode = "HDMI";
+		};
+
+		sti_uni_player1: sti-uni-player at 1 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_1>;
+			assigned-clocks = <&clk_s_d0_quadfs 1>, <&clk_s_d0_flexgen
CLK_PCM_1>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 1>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D81000 0x158>;
+			interrupts = <GIC_SPI 85 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 3 0 1>;
+			dai-name = "Uni Player #1 (PIO)";
+			dma-names = "tx";
+			st,uniperiph-id = <1>;
+			st,version = <5>;
+			st,mode = "PCM";
+		};
+
+		sti_uni_player2: sti-uni-player at 2 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+			assigned-clocks = <&clk_s_d0_quadfs 2>, <&clk_s_d0_flexgen
CLK_PCM_2>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 2>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D82000 0x158>;
+			interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 4 0 1>;
+			dai-name = "Uni Player #1 (DAC)";
+			dma-names = "tx";
+			st,uniperiph-id = <2>;
+			st,version = <5>;
+			st,mode = "PCM";
+		};
+
+		sti_uni_player3: sti-uni-player at 3 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_SPDIFF>;
+			assigned-clocks = <&clk_s_d0_quadfs 3>, <&clk_s_d0_flexgen
CLK_SPDIFF>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 3>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D85000 0x158>;
+			interrupts = <GIC_SPI 89 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 7 0 1>;
+			dma-names = "tx";
+			dai-name = "Uni Player #1 (PIO)";
+			st,uniperiph-id = <3>;
+			st,version = <5>;
+			st,mode = "SPDIF";
+		};
 	};
 };
-- 
1.9.1

This patch adds the DT node for the uniperif reader
IP block found on STiH407 family silicon.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
index d263c96..bdddf2c 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -956,5 +956,31 @@
 			st,version = <5>;
 			st,mode = "SPDIF";
 		};
+
+		sti_uni_reader0: sti-uni-reader at 0 {
+			compatible = "st,sti-uni-reader";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			reg = <0x8D83000 0x158>;
+			interrupts = <GIC_SPI 87 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 5 0 1>;
+			dma-names = "rx";
+			dai-name = "Uni Reader #0 (PCM IN)";
+			st,version = <3>;
+		};
+
+		sti_uni_reader1: sti-uni-reader at 1 {
+			compatible = "st,sti-uni-reader";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			reg = <0x8D84000 0x158>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 6 0 1>;
+			dma-names = "rx";
+			dai-name = "Uni Reader #1 (HDMI RX)";
+			st,version = <3>;
+		};
 	};
 };
-- 
1.9.1

This patch enables the uniperif players 2 & 3 for b2120 boards
and also adds the "simple-audio-card" device node to interconnect
the SoC sound device and the codec.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 arch/arm/boot/dts/stihxxx-b2120.dtsi | 45 ++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm/boot/dts/stihxxx-b2120.dtsi
b/arch/arm/boot/dts/stihxxx-b2120.dtsi
index 722c63f..1f64bb6 100644
--- a/arch/arm/boot/dts/stihxxx-b2120.dtsi
+++ b/arch/arm/boot/dts/stihxxx-b2120.dtsi
@@ -131,5 +131,50 @@
 				dvb-card	= <STV0367_TDA18212_NIMA_1>;
 			};
 		};
+
+		sti_uni_player2: sti-uni-player at 2 {
+			status = "okay";
+		};
+
+		sti_uni_player3: sti-uni-player at 3 {
+			status = "okay";
+		};
+
+		sti_sasg_codec: sti-sasg-codec {
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_spdif_out>;
+		};
+
+		sound {
+			compatible = "simple-audio-card";
+			simple-audio-card,name = "sti audio card";
+			status = "okay";
+
+			simple-audio-card,dai-link at 0 {
+				/* DAC */
+				format = "i2s";
+				mclk-fs = <256>;
+				cpu {
+					sound-dai = <&sti_uni_player2>;
+				};
+
+				codec {
+					sound-dai = <&sti_sasg_codec 1>;
+				};
+			};
+			simple-audio-card,dai-link at 1 {
+				/* SPDIF */
+				format = "left_j";
+				mclk-fs = <128>;
+				cpu {
+					sound-dai = <&sti_uni_player3>;
+				};
+
+				codec {
+					sound-dai = <&sti_sasg_codec 0>;
+				};
+			};
+		};
 	};
 };
-- 
1.9.1

[..]
drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:5:	symbol FB is selected by DRM_KMS_FB_HELPER
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/Kconfig:42:	symbol DRM_KMS_FB_HELPER depends on DRM_KMS_HELPER
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/Kconfig:36:	symbol DRM_KMS_HELPER is selected by DRM_VIRTIO_GPU
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpu/drm/virtio/Kconfig:1:	symbol DRM_VIRTIO_GPU depends on VIRTIO
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/virtio/Kconfig:1:	symbol VIRTIO is selected by REMOTEPROC
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/remoteproc/Kconfig:4:	symbol REMOTEPROC is selected by
ST_SLIM_REMOTEPROC
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/remoteproc/Kconfig:103:	symbol ST_SLIM_REMOTEPROC is selected by ST_FDMA
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/dma/Kconfig:440:	symbol ST_FDMA depends on DMADEVICES
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/dma/Kconfig:5:	symbol DMADEVICES is selected by SND_SOC_SH4_SIU
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
sound/soc/sh/Kconfig:29:	symbol SND_SOC_SH4_SIU is selected by SND_SIU_MIGOR
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
sound/soc/sh/Kconfig:64:	symbol SND_SIU_MIGOR depends on I2C
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/i2c/Kconfig:7:	symbol I2C is selected by FB_DDC
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:63:	symbol FB_DDC is selected by FB_CYBER2000_DDC
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:378:	symbol FB_CYBER2000_DDC depends on FB_CYBER2000
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/video/fbdev/Kconfig:366:	symbol FB_CYBER2000 depends on FB

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 drivers/gpu/drm/virtio/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/Kconfig b/drivers/gpu/drm/virtio/Kconfig
index e1afc3d..90357d9 100644
--- a/drivers/gpu/drm/virtio/Kconfig
+++ b/drivers/gpu/drm/virtio/Kconfig
@@ -1,6 +1,7 @@
 config DRM_VIRTIO_GPU
 	tristate "Virtio GPU driver"
-	depends on DRM && VIRTIO
+	depends on DRM
+	select VIRTIO
         select DRM_KMS_HELPER
         select DRM_TTM
 	help
-- 
1.9.1

Use tabs instead of spaces.

Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
 drivers/gpu/drm/virtio/Kconfig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/Kconfig b/drivers/gpu/drm/virtio/Kconfig
index 90357d9..2d83932 100644
--- a/drivers/gpu/drm/virtio/Kconfig
+++ b/drivers/gpu/drm/virtio/Kconfig
@@ -2,10 +2,10 @@ config DRM_VIRTIO_GPU
 	tristate "Virtio GPU driver"
 	depends on DRM
 	select VIRTIO
-        select DRM_KMS_HELPER
-        select DRM_TTM
+	select DRM_KMS_HELPER
+	select DRM_TTM
 	help
 	   This is the virtual GPU driver for virtio.  It can be used with
-           QEMU based VMMs (like KVM or Xen).
+	   QEMU based VMMs (like KVM or Xen).
 
 	   If unsure say M.
-- 
1.9.1

On Fri, 26 Aug 2016, Peter Griffin wrote:
> Use tabs instead of spaces.
> 
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  drivers/gpu/drm/virtio/Kconfig | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
For my own reference:
  Acked-by: Lee Jones <lee.jones at linaro.org>
> diff --git a/drivers/gpu/drm/virtio/Kconfig
b/drivers/gpu/drm/virtio/Kconfig
> index 90357d9..2d83932 100644
> --- a/drivers/gpu/drm/virtio/Kconfig
> +++ b/drivers/gpu/drm/virtio/Kconfig
> @@ -2,10 +2,10 @@ config DRM_VIRTIO_GPU
>  	tristate "Virtio GPU driver"
>  	depends on DRM
>  	select VIRTIO
> -        select DRM_KMS_HELPER
> -        select DRM_TTM
> +	select DRM_KMS_HELPER
> +	select DRM_TTM
>  	help
>  	   This is the virtual GPU driver for virtio.  It can be used with
> -           QEMU based VMMs (like KVM or Xen).
> +	   QEMU based VMMs (like KVM or Xen).
>  
>  	   If unsure say M.
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> [..]
> drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:5:	symbol FB is selected by DRM_KMS_FB_HELPER
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/Kconfig:42:	symbol DRM_KMS_FB_HELPER depends on
DRM_KMS_HELPER
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/Kconfig:36:	symbol DRM_KMS_HELPER is selected by
DRM_VIRTIO_GPU
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/virtio/Kconfig:1:	symbol DRM_VIRTIO_GPU depends on VIRTIO
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/virtio/Kconfig:1:	symbol VIRTIO is selected by REMOTEPROC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/remoteproc/Kconfig:4:	symbol REMOTEPROC is selected by
ST_SLIM_REMOTEPROC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/remoteproc/Kconfig:103:	symbol ST_SLIM_REMOTEPROC is selected by
ST_FDMA
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/dma/Kconfig:440:	symbol ST_FDMA depends on DMADEVICES
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/dma/Kconfig:5:	symbol DMADEVICES is selected by SND_SOC_SH4_SIU
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> sound/soc/sh/Kconfig:29:	symbol SND_SOC_SH4_SIU is selected by
SND_SIU_MIGOR
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> sound/soc/sh/Kconfig:64:	symbol SND_SIU_MIGOR depends on I2C
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/i2c/Kconfig:7:	symbol I2C is selected by FB_DDC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:63:	symbol FB_DDC is selected by
FB_CYBER2000_DDC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:378:	symbol FB_CYBER2000_DDC depends on
FB_CYBER2000
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:366:	symbol FB_CYBER2000 depends on FB
An explanation of why this is happening and why your fix works is
usually helpful here.
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  drivers/gpu/drm/virtio/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/virtio/Kconfig
b/drivers/gpu/drm/virtio/Kconfig
> index e1afc3d..90357d9 100644
> --- a/drivers/gpu/drm/virtio/Kconfig
> +++ b/drivers/gpu/drm/virtio/Kconfig
> @@ -1,6 +1,7 @@
>  config DRM_VIRTIO_GPU
>  	tristate "Virtio GPU driver"
> -	depends on DRM && VIRTIO
> +	depends on DRM
> +	select VIRTIO
>          select DRM_KMS_HELPER
>          select DRM_TTM
>  	help
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch enables the uniperif players 2 & 3 for b2120 boards
> and also adds the "simple-audio-card" device node to interconnect
> the SoC sound device and the codec.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stihxxx-b2120.dtsi | 45
++++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
> diff --git a/arch/arm/boot/dts/stihxxx-b2120.dtsi
b/arch/arm/boot/dts/stihxxx-b2120.dtsi
> index 722c63f..1f64bb6 100644
> --- a/arch/arm/boot/dts/stihxxx-b2120.dtsi
> +++ b/arch/arm/boot/dts/stihxxx-b2120.dtsi
> @@ -131,5 +131,50 @@
>  				dvb-card	= <STV0367_TDA18212_NIMA_1>;
>  			};
>  		};
> +
> +		sti_uni_player2: sti-uni-player at 2 {
> +			status = "okay";
> +		};
> +
> +		sti_uni_player3: sti-uni-player at 3 {
> +			status = "okay";
> +		};
> +
> +		sti_sasg_codec: sti-sasg-codec {
> +			status = "okay";
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pinctrl_spdif_out>;
> +		};
> +
> +		sound {
> +			compatible = "simple-audio-card";
> +			simple-audio-card,name = "sti audio card";
> +			status = "okay";
> +
> +			simple-audio-card,dai-link at 0 {
> +				/* DAC */
> +				format = "i2s";
> +				mclk-fs = <256>;
> +				cpu {
> +					sound-dai = <&sti_uni_player2>;
> +				};
> +
> +				codec {
> +					sound-dai = <&sti_sasg_codec 1>;
> +				};
> +			};
> +			simple-audio-card,dai-link at 1 {
> +				/* SPDIF */
> +				format = "left_j";
> +				mclk-fs = <128>;
> +				cpu {
> +					sound-dai = <&sti_uni_player3>;
> +				};
> +
> +				codec {
> +					sound-dai = <&sti_sasg_codec 0>;
> +				};
> +			};
> +		};
>  	};
>  };
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the DT node for the uniperif reader
> IP block found on STiH407 family silicon.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-family.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
> index d263c96..bdddf2c 100644
> --- a/arch/arm/boot/dts/stih407-family.dtsi
> +++ b/arch/arm/boot/dts/stih407-family.dtsi
> @@ -956,5 +956,31 @@
>  			st,version = <5>;
>  			st,mode = "SPDIF";
>  		};
> +
> +		sti_uni_reader0: sti-uni-reader at 0 {
> +			compatible = "st,sti-uni-reader";
> +			status = "disabled";
I find it's normally nicer to place the status of the node at the
bottom, separated by a '\n'.  There isn't a functional difference
admittedly, but it would be my preference, since it's not describing
the device per se.
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			reg = <0x8D83000 0x158>;
We usually use lower-case for the address.

Since this has a 'reg' property, the '0' in the node name does
not
look appropriate.
> +			interrupts = <GIC_SPI 87 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 5 0 1>;
> +			dma-names = "rx";
> +			dai-name = "Uni Reader #0 (PCM IN)";
Oooo, not seen something like this before.

If it does not already have one, it would require a DT Ack.
> +			st,version = <3>;
This will likely need a DT Ack too.  We usually encode this sort of
information in the compatible string.
> +		};
> +
> +		sti_uni_reader1: sti-uni-reader at 1 {
> +			compatible = "st,sti-uni-reader";
> +			status = "disabled";
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			reg = <0x8D84000 0x158>;
> +			interrupts = <GIC_SPI 88 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 6 0 1>;
> +			dma-names = "rx";
> +			dai-name = "Uni Reader #1 (HDMI RX)";
> +			st,version = <3>;
> +		};
All as above.
>  	};
>  };
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the DT nodes for the uniperif player
> IP blocks found on STiH407 family silicon.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-family.dtsi | 76
+++++++++++++++++++++++++++++++++++
>  1 file changed, 76 insertions(+)
Same comments as in patch 14.
> diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
> index d1258d5..d263c96 100644
> --- a/arch/arm/boot/dts/stih407-family.dtsi
> +++ b/arch/arm/boot/dts/stih407-family.dtsi
> @@ -880,5 +880,81 @@
>  			status = "disabled";
>  			st,syscfg = <&syscfg_core>;
>  		};
> +
> +		sti_uni_player0: sti-uni-player at 0 {
> +			compatible = "st,sti-uni-player";
> +			status = "disabled";
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			clocks = <&clk_s_d0_flexgen CLK_PCM_0>;
> +			assigned-clocks = <&clk_s_d0_quadfs 0>,
<&clk_s_d0_flexgen CLK_PCM_0>;
> +			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 0>;
> +			assigned-clock-rates = <50000000>;
> +			reg = <0x8D80000 0x158>;
> +			interrupts = <GIC_SPI 84 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 2 0 1>;
> +			dai-name = "Uni Player #0 (HDMI)";
> +			dma-names = "tx";
> +			st,uniperiph-id = <0>;
> +			st,version = <5>;
> +			st,mode = "HDMI";
> +		};
> +
> +		sti_uni_player1: sti-uni-player at 1 {
> +			compatible = "st,sti-uni-player";
> +			status = "disabled";
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			clocks = <&clk_s_d0_flexgen CLK_PCM_1>;
> +			assigned-clocks = <&clk_s_d0_quadfs 1>,
<&clk_s_d0_flexgen CLK_PCM_1>;
> +			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 1>;
> +			assigned-clock-rates = <50000000>;
> +			reg = <0x8D81000 0x158>;
> +			interrupts = <GIC_SPI 85 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 3 0 1>;
> +			dai-name = "Uni Player #1 (PIO)";
> +			dma-names = "tx";
> +			st,uniperiph-id = <1>;
> +			st,version = <5>;
> +			st,mode = "PCM";
> +		};
> +
> +		sti_uni_player2: sti-uni-player at 2 {
> +			compatible = "st,sti-uni-player";
> +			status = "disabled";
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
> +			assigned-clocks = <&clk_s_d0_quadfs 2>,
<&clk_s_d0_flexgen CLK_PCM_2>;
> +			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 2>;
> +			assigned-clock-rates = <50000000>;
> +			reg = <0x8D82000 0x158>;
> +			interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 4 0 1>;
> +			dai-name = "Uni Player #1 (DAC)";
> +			dma-names = "tx";
> +			st,uniperiph-id = <2>;
> +			st,version = <5>;
> +			st,mode = "PCM";
> +		};
> +
> +		sti_uni_player3: sti-uni-player at 3 {
> +			compatible = "st,sti-uni-player";
> +			status = "disabled";
> +			#sound-dai-cells = <0>;
> +			st,syscfg = <&syscfg_core>;
> +			clocks = <&clk_s_d0_flexgen CLK_SPDIFF>;
> +			assigned-clocks = <&clk_s_d0_quadfs 3>,
<&clk_s_d0_flexgen CLK_SPDIFF>;
> +			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 3>;
> +			assigned-clock-rates = <50000000>;
> +			reg = <0x8D85000 0x158>;
> +			interrupts = <GIC_SPI 89 IRQ_TYPE_NONE>;
> +			dmas = <&fdma0 7 0 1>;
> +			dma-names = "tx";
> +			dai-name = "Uni Player #1 (PIO)";
> +			st,uniperiph-id = <3>;
> +			st,version = <5>;
> +			st,mode = "SPDIF";
> +		};
>  	};
>  };
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the dt node for the internal audio
> codec IP.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-family.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
  
> diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
> index 45cab30..d1258d5 100644
> --- a/arch/arm/boot/dts/stih407-family.dtsi
> +++ b/arch/arm/boot/dts/stih407-family.dtsi
> @@ -873,5 +873,12 @@
>  				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
>  				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
>  		};
> +
> +		sti_sasg_codec: sti-sasg-codec {
> +			compatible = "st,stih407-sas-codec";
> +			#sound-dai-cells = <1>;
> +			status = "disabled";
> +			st,syscfg = <&syscfg_core>;
> +		};
>  	};
>  };
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the pinctrl config for the spidf out
> pins used by the sasg codec IP.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-pinctrl.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
> diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> index 537db7e..598dbab 100644
> --- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> @@ -1114,6 +1114,14 @@
>  				};
>  			};
>  
> +			spdif_out {
> +				pinctrl_spdif_out: spdif_out{
> +					st,pins {
> +						spdif_out = <&pio34 7 ALT1 OUT>;
> +					};
> +				};
> +			};
> +
>  			serial3 {
>  				pinctrl_serial3: serial3-0 {
>  					st,pins {
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the pinctrl config for the i2s_in pins
> used by the uniperif reader IP.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-pinctrl.dtsi | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
  
> diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> index 0fb5c8a..537db7e 100644
> --- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> @@ -1090,6 +1090,30 @@
>  				};
>  			};
>  
> +			i2s_in {
> +				pinctrl_i2s_8ch_in: i2s_8ch_in{
> +					st,pins {
> +						mclk = <&pio32 5 ALT1 IN>;
> +						lrclk = <&pio32 7 ALT1 IN>;
> +						sclk = <&pio32 6 ALT1 IN>;
> +						data0 = <&pio32 4 ALT1 IN>;
> +						data1 = <&pio33 0 ALT1 IN>;
> +						data2 = <&pio33 1 ALT1 IN>;
> +						data3 = <&pio33 2 ALT1 IN>;
> +						data4 = <&pio33 3 ALT1 IN>;
> +					};
> +				};
> +
> +				pinctrl_i2s_2ch_in: i2s_2ch_in{
> +					st,pins {
> +						mclk = <&pio32 5 ALT1 IN>;
> +						lrclk = <&pio32 7 ALT1 IN>;
> +						sclk = <&pio32 6 ALT1 IN>;
> +						data0 = <&pio32 4 ALT1 IN>;
> +					};
> +				};
> +			};
> +
>  			serial3 {
>  				pinctrl_serial3: serial3-0 {
>  					st,pins {
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the pinctrl config for the i2s_out pins
> used by the uniperif player IP.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-pinctrl.dtsi | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
> diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi
b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> index a538ae5..0fb5c8a 100644
> --- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
> @@ -1067,6 +1067,29 @@
>  				};
>  			};
>  
> +			i2s_out {
> +				pinctrl_i2s_8ch_out: i2s_8ch_out{
> +					st,pins {
> +						mclk = <&pio33 5 ALT1 OUT>;
> +						lrclk = <&pio33 7 ALT1 OUT>;
> +						sclk = <&pio33 6 ALT1 OUT>;
> +						data0 = <&pio33 4 ALT1 OUT>;
> +						data1 = <&pio34 0 ALT1 OUT>;
> +						data2 = <&pio34 1 ALT1 OUT>;
> +						data3 = <&pio34 2 ALT1 OUT>;
> +					};
> +				};
> +
> +				pinctrl_i2s_2ch_out: i2s_2ch_out{
> +					st,pins {
> +						mclk = <&pio33 5 ALT1 OUT>;
> +						lrclk = <&pio33 7 ALT1 OUT>;
> +						sclk = <&pio33 6 ALT1 OUT>;
> +						data0 = <&pio33 4 ALT1 OUT>;
> +					};
> +				};
> +			};
> +
>  			serial3 {
>  				pinctrl_serial3: serial3-0 {
>  					st,pins {
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Nit: Remove full-stop from $SUBJECT

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch enables the STi ALSA drivers found on STi platforms
> as well as the simple-card driver which is a dependency to have
> working sound.
> 
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> Cc: arnaud.pouliquen at st.com
> Cc: broonie at kernel.org
> ---
>  arch/arm/configs/multi_v7_defconfig | 3 +++
>  1 file changed, 3 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
  
> diff --git a/arch/arm/configs/multi_v7_defconfig
b/arch/arm/configs/multi_v7_defconfig
> index 998578a..51a38b1 100644
> --- a/arch/arm/configs/multi_v7_defconfig
> +++ b/arch/arm/configs/multi_v7_defconfig
> @@ -644,6 +644,9 @@ CONFIG_SND_SOC_AK4642=m
>  CONFIG_SND_SOC_SGTL5000=m
>  CONFIG_SND_SOC_SPDIF=m
>  CONFIG_SND_SOC_WM8978=m
> +CONFIG_SND_SOC_STI=m
> +CONFIG_SND_SOC_STI_SAS=m
> +CONFIG_SND_SIMPLE_CARD=m
>  CONFIG_USB=y
>  CONFIG_USB_XHCI_HCD=y
>  CONFIG_USB_XHCI_MVEBU=y
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> These nodes are required to get the fdma driver working
> on STiH407 based silicon.
> 
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  arch/arm/boot/dts/stih407-family.dtsi | 52
+++++++++++++++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
  
> diff --git a/arch/arm/boot/dts/stih407-family.dtsi
b/arch/arm/boot/dts/stih407-family.dtsi
> index d294e82..45cab30 100644
> --- a/arch/arm/boot/dts/stih407-family.dtsi
> +++ b/arch/arm/boot/dts/stih407-family.dtsi
> @@ -821,5 +821,57 @@
>  			clock-frequency	= <600000000>;
>  			st,syscfg	= <&syscfg_core 0x224>;
>  		};
> +
> +		/* fdma audio */
> +		fdma0: dma-controller at 8e20000 {
> +			compatible = "st,stih407-fdma-mpe31-11",
"st,slim-rproc";
> +			reg = <0x8e20000 0x8000>,
> +			      <0x8e30000 0x3000>,
> +			      <0x8e37000 0x1000>,
> +			      <0x8e38000 0x8000>;
> +			reg-names = "slimcore", "dmem",
"peripherals", "imem";
> +			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
> +				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
> +				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
> +				 <&clk_s_c0_flexgen CLK_EXT2F_A9>;
> +			interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
> +			dma-channels = <16>;
> +			#dma-cells = <3>;
> +		};
> +
> +		/* fdma app */
> +		fdma1: dma-controller at 8e40000 {
> +			compatible = "st,stih407-fdma-mpe31-12",
"st,slim-rproc";
> +			reg = <0x8e40000 0x8000>,
> +			      <0x8e50000 0x3000>,
> +			      <0x8e57000 0x1000>,
> +			      <0x8e58000 0x8000>;
> +			reg-names = "slimcore", "dmem",
"peripherals", "imem";
> +			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
> +				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
> +				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
> +				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
> +
> +			interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>;
> +			dma-channels = <16>;
> +			#dma-cells = <3>;
> +		};
> +
> +		/* fdma free running */
> +		fdma2: dma-controller at 8e60000 {
> +			compatible = "st,stih407-fdma-mpe31-13",
"st,slim-rproc";
> +			reg = <0x8e60000 0x8000>,
> +			      <0x8e70000 0x3000>,
> +			      <0x8e77000 0x1000>,
> +			      <0x8e78000 0x8000>;
> +			reg-names = "slimcore", "dmem",
"peripherals", "imem";
> +			interrupts = <GIC_SPI 9 IRQ_TYPE_NONE>;
> +			dma-channels = <16>;
> +			#dma-cells = <3>;
> +			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
> +				<&clk_s_c0_flexgen CLK_EXT2F_A9>,
> +				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
> +				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
> +		};
>  	};
>  };
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> This patch adds the slim core rproc driver to the STi section
> of the MAINTAINERS file.
> 
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  MAINTAINERS | 2 ++
>  1 file changed, 2 insertions(+)
Acked-by: Lee Jones <lee.jones at linaro.org>
  
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0bbe4b1..5dd3b24 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1749,6 +1749,7 @@ F:	drivers/phy/phy-stih407-usb.c
>  F:	drivers/phy/phy-stih41x-usb.c
>  F:	drivers/pinctrl/pinctrl-st.c
>  F:	drivers/remoteproc/st_remoteproc.c
> +F:	drivers/remoteproc/st_slim_rproc.c
>  F:	drivers/reset/sti/
>  F:	drivers/rtc/rtc-st-lpc.c
>  F:	drivers/tty/serial/st-asc.c
> @@ -1757,6 +1758,7 @@ F:	drivers/usb/host/ehci-st.c
>  F:	drivers/usb/host/ohci-st.c
>  F:	drivers/watchdog/st_lpc_wdt.c
>  F:	drivers/ata/ahci_st.c
> +F:	include/linux/remoteproc/st_slim_rproc.h
>  
>  ARM/STM32 ARCHITECTURE
>  M:	Maxime Coquelin <mcoquelin.stm32 at gmail.com>
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 26 Aug 2016, Peter Griffin wrote:
> slim core is used as a basis for many IPs in the STi
> chipsets such as fdma and demux. To avoid duplicating
> the elf loading code in each device driver a slim
> rproc driver has been created.
> 
> This driver is designed to be used by other device drivers
> such as fdma, or demux whose IP is based around a slim core.
> The device driver can call slim_rproc_alloc() to allocate
> a slim rproc and slim_rproc_put() when finished.
> 
> This driver takes care of ioremapping the slim
> registers (dmem, imem, slimcore, peripherals), whose offsets
> and sizes can change between IP's. It also obtains and enables
> any clocks used by the device. This approach avoids having
> a double mapping of the registers as slim_rproc does not register
> its own platform device. It also maps well to device tree
> abstraction as it allows us to have one dt node for the whole
> device.
> 
> All of the generic rproc elf loading code can be reused, and
> we provide start() stop() hooks to start and stop the slim
> core once the firmware has been loaded. This has been tested
> successfully with fdma driver.
Nit.  It would be good to use a constant line-wrap.

'M-x post-mode' will help with this.
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
>  drivers/remoteproc/Kconfig               |   8 +
>  drivers/remoteproc/Makefile              |   1 +
>  drivers/remoteproc/st_slim_rproc.c       | 364
+++++++++++++++++++++++++++++++
>  include/linux/remoteproc/st_slim_rproc.h |  53 +++++
>  4 files changed, 426 insertions(+)
>  create mode 100644 drivers/remoteproc/st_slim_rproc.c
>  create mode 100644 include/linux/remoteproc/st_slim_rproc.h
> 
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index 1a8bf76a..06765e0 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -100,4 +100,12 @@ config ST_REMOTEPROC
>  	  processor framework.
>  	  This can be either built-in or a loadable module.
>  
> +config ST_SLIM_REMOTEPROC
> +	tristate "ST Slim remoteproc support"
> +	select REMOTEPROC
> +	help
> +	  Say y here to support firmware loading on IP based around
> +	  the Slim core.
> +	  If unsure say N.
> +
>  endmenu
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 92d3758..db1dae7 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -14,3 +14,4 @@ obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
>  obj-$(CONFIG_QCOM_MDT_LOADER)		+= qcom_mdt_loader.o
>  obj-$(CONFIG_QCOM_Q6V5_PIL)		+= qcom_q6v5_pil.o
>  obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
> +obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
> diff --git a/drivers/remoteproc/st_slim_rproc.c
b/drivers/remoteproc/st_slim_rproc.c
> new file mode 100644
> index 0000000..f4bf2d7
> --- /dev/null
> +++ b/drivers/remoteproc/st_slim_rproc.c
> @@ -0,0 +1,364 @@
> +/*
> + * st_slim_rproc.c
These serve no purpose and have a habit of becoming out-of-date.
Please remove it and replace with a nice succinct description
instead.
> + * Copyright (C) 2016 STMicroelectronics
Nit: '\n' here.
> + * Author: Peter Griffin <peter.griffin at linaro.org>
Nit: '\n' here.
> + * License terms:  GNU General Public License (GPL), version 2
Are you sure ST are okay with the shortened version of the GPL?
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/remoteproc.h>
> +#include <linux/remoteproc/st_slim_rproc.h>
> +#include "remoteproc_internal.h"
> +
> +/* slimcore registers */
What's it called? slimcore, slim core, ST Slim?

Please be consistent.  Use the name from the datasheet.
> +#define SLIM_ID_OFST		0x0
> +#define SLIM_VER_OFST		0x4
> +
> +#define SLIM_EN_OFST		0x8
> +#define SLIM_EN_RUN			BIT(0)
> +
> +#define SLIM_CLK_GATE_OFST	0xC
> +#define SLIM_CLK_GATE_DIS		BIT(0)
> +#define SLIM_CLK_GATE_RESET		BIT(2)
> +
> +#define SLIM_SLIM_PC_OFST	0x20
> +
> +/* dmem registers */
> +#define SLIM_REV_ID_OFST	0x0
> +#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
> +#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
> +#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
> +#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)
> +
> +
> +/* peripherals registers */
> +#define SLIM_STBUS_SYNC_OFST	0xF88
> +#define SLIM_STBUS_SYNC_DIS		BIT(0)
> +
> +#define SLIM_INT_SET_OFST	0xFD4
> +#define SLIM_INT_CLR_OFST	0xFD8
> +#define SLIM_INT_MASK_OFST	0xFDC
> +
> +#define SLIM_CMD_CLR_OFST	0xFC8
> +#define SLIM_CMD_MASK_OFST	0xFCC
> +
> +static const char *mem_names[ST_SLIM_MEM_MAX] = {
> +	[ST_SLIM_DMEM]	= "dmem",
> +	[ST_SLIM_IMEM]	= "imem",
> +};
> +
> +static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device
*dev)
> +{
> +	int clk, err;
> +
> +	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
> +		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
> +		if (IS_ERR(slim_rproc->clks[clk])) {
> +			err = PTR_ERR(slim_rproc->clks[clk]);
> +			if (err == -EPROBE_DEFER)
> +				goto err_put_clks;
> +			slim_rproc->clks[clk] = NULL;
> +			break;
> +		}
> +	}
> +
> +	return 0;
> +
> +err_put_clks:
> +	while (--clk >= 0)
> +		clk_put(slim_rproc->clks[clk]);
> +
> +	return err;
> +}
> +
> +static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
> +{
> +	int clk;
> +
> +	for (clk = 0; clk < ST_SLIM_MAX_CLK &&
slim_rproc->clks[clk]; clk++)
> +		clk_disable_unprepare(slim_rproc->clks[clk]);
> +}
> +
> +static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
> +{
> +	int clk, ret;
> +
> +	for (clk = 0; clk < ST_SLIM_MAX_CLK &&
slim_rproc->clks[clk]; clk++) {
> +		ret = clk_prepare_enable(slim_rproc->clks[clk]);
> +		if (ret)
> +			goto err_disable_clks;
> +	}
> +
> +	return 0;
> +
> +err_disable_clks:
> +	while (--clk >= 0)
> +		clk_disable_unprepare(slim_rproc->clks[clk]);
> +
> +	return ret;
> +}
> +
> +/**
> + * Remoteproc slim specific device handlers
> + */
I suggest not using kernel-doc format for this type of comment.
> +static int slim_rproc_start(struct rproc *rproc)
> +{
> +	struct device *dev = &rproc->dev;
> +	struct st_slim_rproc *slim_rproc = rproc->priv;
> +	unsigned long hw_id, hw_ver, fw_rev;
> +	u32 val;
> +	int ret;
> +
> +	ret = slim_clk_enable(slim_rproc);
> +	if (ret) {
> +		dev_err(dev, "Failed to enable clocks\n");
> +		return ret;
> +	}
> +
> +	/* disable CPU pipeline clock & reset cpu pipeline */
Be consistent.  Is it 'cpu' or 'CPU'.  Personally I find using
'correct English' to be the most consistent way of formatting
comments i.e. Capitals for names, acronyms and at the start of a
sentence.
> +	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
> +	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
> +
> +	/* disable SLIM core STBus sync */
> +	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
> +
> +	/* enable cpu pipeline clock */
> +	writel(!SLIM_CLK_GATE_DIS,
> +		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
> +
> +	/* clear int & cmd mailbox */
> +	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
> +	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
> +
> +	/* enable all channels cmd & int */
> +	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
> +	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
> +
> +	/* enable cpu */
> +	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
> +
> +	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
> +	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
> +
> +	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
> +			SLIM_REV_ID_OFST);
> +
> +	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
> +		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
> +		 hw_id, hw_ver);
> +
> +	return 0;
> +}
> +
> +static int slim_rproc_stop(struct rproc *rproc)
> +{
> +	struct st_slim_rproc *slim_rproc = rproc->priv;
> +	u32 val;
> +
> +	/* mask all (cmd & int) channels */
> +	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
> +	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
> +
> +	/* disable cpu pipeline clock */
> +	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
> +
> +	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
> +
> +	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
> +	if (val & SLIM_EN_RUN)
> +		dev_warn(&rproc->dev, "Failed to disable SLIM");
> +
> +	slim_clk_disable(slim_rproc);
> +
> +	dev_dbg(&rproc->dev, "slim stopped\n");
> +
> +	return 0;
> +}
> +
> +static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +{
> +	struct st_slim_rproc *slim_rproc = rproc->priv;
> +	void *va = NULL;
> +	int i;
> +
> +	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
> +		if (da != slim_rproc->mem[i].bus_addr)
> +			continue;
> +
> +		if (len <= slim_rproc->mem[i].size) {
> +			/* __force to make sparse happy with type conversion */
> +			va = (__force void *)slim_rproc->mem[i].cpu_addr;
> +			break;
> +		}
> +	}
> +
> +	dev_dbg(&rproc->dev, "%s: da = 0x%llx len = 0x%x va =
0x%p\n",
> +		__func__, da, len, va);
Non-consistent with other debug prints.  I suggest dropping the
_func_.  It's a nice to have during initial debugging, but I don't
usually find them useful upstream.
> +	return va;
> +}
> +
> +static struct rproc_ops slim_rproc_ops = {
> +	.start		= slim_rproc_start,
> +	.stop		= slim_rproc_stop,
> +	.da_to_va       = slim_rproc_da_to_va,
> +};
> +
> +/**
> + * Firmware handler operations: sanity, boot address, load ...
> + */
Don't use kernel-doc for these.
> +static struct resource_table empty_rsc_tbl = {
> +	.ver = 1,
> +	.num = 0,
> +};
This should go away soon.

Be prepared to remove this once the code lands.
> +static struct resource_table *slim_rproc_find_rsc_table(struct rproc
*rproc,
> +					       const struct firmware *fw,
> +					       int *tablesz)
> +{
> +	*tablesz = sizeof(empty_rsc_tbl);
> +	return &empty_rsc_tbl;
> +}
> +
> +static struct rproc_fw_ops slim_rproc_fw_ops = {
> +	.find_rsc_table = slim_rproc_find_rsc_table,
> +};
> +
> +/**
> + * st_slim_rproc_alloc() - allocate and initialise slim rproc
> + * @pdev: Pointer to the platform_device struct
> + * @fw_name: Name of firmware for rproc to use
> + *
> + * Function for allocating and initialising a slim rproc for use by
> + * device drivers whose IP is based around the slim slim core. It
"slim slim"?  Do you mean "really slim"? ;)
> + * obtains and enables any clocks required by the slim core and also
> + * ioremaps the various IO.
> + *
> + * Returns st_slim_rproc pointer or PTR_ERR() on error.
> + */
> +
> +struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
> +				char *fw_name)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct st_slim_rproc *slim_rproc;
> +	struct device_node *np = dev->of_node;
> +	struct rproc *rproc;
> +	struct resource *res;
> +	int err, i;
> +	const struct rproc_fw_ops *elf_ops;
> +
> +	if (WARN_ON(!np || !fw_name))
> +		return ERR_PTR(-EINVAL);
!np should not happen, ever.  You can remove the check.
> +	if (!of_device_is_compatible(np, "st,slim-rproc"))
> +		return ERR_PTR(-EINVAL);
> +
> +	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
> +			fw_name, sizeof(*slim_rproc));
> +	if (!rproc)
> +		return ERR_PTR(-ENOMEM);
> +
> +	rproc->has_iommu = false;
> +
> +	slim_rproc = rproc->priv;
> +	slim_rproc->rproc = rproc;
> +
> +	elf_ops = rproc->fw_ops;
> +	/* Use some generic elf ops */
> +	slim_rproc_fw_ops.load = elf_ops->load;
> +	slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;
> +
> +	rproc->fw_ops = &slim_rproc_fw_ops;
> +
> +	/* get imem and dmem */
> +	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
> +
Superfluous '\n'.
> +		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> +						mem_names[i]);
> +
> +		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
> +		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
> +			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
> +			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
> +			goto err;
> +		}
> +		slim_rproc->mem[i].bus_addr = res->start;
> +		slim_rproc->mem[i].size = resource_size(res);
> +	}
> +
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"slimcore");
Superfluous '\n'.
> +	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(slim_rproc->slimcore)) {
> +		dev_err(&pdev->dev,
> +			"devm_ioremap_resource failed for slimcore\n");
Best not to quote function names.  Instead write the description in
plain English; "failed to remap 'slimcore' IO", or similar. 
> +		err = PTR_ERR(slim_rproc->slimcore);
> +		goto err;
> +	}
> +
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"peripherals");
> +
Superfluous '\n'.
> +	slim_rproc->peri = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(slim_rproc->peri)) {
> +		dev_err(&pdev->dev, "devm_ioremap_resource failed for
peri\n");
As above.
> +		err = PTR_ERR(slim_rproc->peri);
> +		goto err;
> +	}
> +
> +	err = slim_clk_get(slim_rproc, dev);
> +	if (err)
> +		goto err;
> +
> +	/* Register as a remoteproc device */
> +	err = rproc_add(rproc);
> +	if (err) {
> +		dev_err(dev, "registration of slim remoteproc failed\n");
> +		goto err_clk;
> +	}
> +
> +	return slim_rproc;
> +
> +err_clk:
> +	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i];
i++)
> +		clk_put(slim_rproc->clks[i]);
> +err:
> +	rproc_put(rproc);
> +	return ERR_PTR(err);
> +}
> +EXPORT_SYMBOL(st_slim_rproc_alloc);
> +
> +/**
> +  * st_slim_rproc_put() - put slim rproc resources
> +  * @slim_rproc: Pointer to the st_slim_rproc struct
> +  *
> +  * Function for calling respective _put() functions on
Early line wrap

  
<--------|---------|---------|---------|---------|---------|---------|--------->
   
> +  * slim_rproc resources.
> +  *
Superfluous '\n'.
> +  */
> +void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
> +{
> +	int clk;
> +
> +	if (!slim_rproc)
> +		return;
> +
> +	for (clk = 0; clk < ST_SLIM_MAX_CLK &&
slim_rproc->clks[clk]; clk++)
> +		clk_put(slim_rproc->clks[clk]);
> +
> +	rproc_del(slim_rproc->rproc);
> +	rproc_put(slim_rproc->rproc);
> +}
> +EXPORT_SYMBOL(st_slim_rproc_put);
> +
> +MODULE_AUTHOR("Peter Griffin");
Email.
> +MODULE_DESCRIPTION("STMicroelectronics SLIM rproc driver");
Now it's "SLIM"?  Make up your mind.
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/remoteproc/st_slim_rproc.h
b/include/linux/remoteproc/st_slim_rproc.h
> new file mode 100644
> index 0000000..64a2c5b
> --- /dev/null
> +++ b/include/linux/remoteproc/st_slim_rproc.h
> @@ -0,0 +1,53 @@
> +/*
> + * st_slim_rproc.h
As above.
> + * Copyright (C) 2016 STMicroelectronics
> + * Author: Peter Griffin <peter.griffin at linaro.org>
> + * License terms:  GNU General Public License (GPL), version 2
> + */
Same for the *.c header.
> +#ifndef _ST_SLIM_H
> +#define _ST_SLIM_H
Best to mention the subsystem too.
> +#define ST_SLIM_MEM_MAX 2
> +#define ST_SLIM_MAX_CLK 4
> +
> +enum {
> +	ST_SLIM_DMEM,
> +	ST_SLIM_IMEM,
> +};
> +
> +/**
> + * struct st_slim_mem - slim internal memory structure
> + * @cpu_addr: MPU virtual address of the memory region
> + * @bus_addr: Bus address used to access the memory region
> + * @size: Size of the memory region
> + */
> +struct st_slim_mem {
> +	void __iomem *cpu_addr;
> +	phys_addr_t bus_addr;
> +	size_t size;
> +};
> +
> +/**
> + * struct st_slim_rproc - SLIM slim core
> + * @rproc: rproc handle
> + * @mem: slim memory information
> + * @slimcore: slim slimcore regs
> + * @peri: slim peripheral regs
> + * @clks: slim clocks
> + */
> +struct st_slim_rproc {
> +	struct rproc *rproc;
> +	struct st_slim_mem mem[ST_SLIM_MEM_MAX];
> +	void __iomem *slimcore;
> +	void __iomem *peri;
> +
> +	/* st_slim_rproc private */
> +	struct clk *clks[ST_SLIM_MAX_CLK];
> +};
> +
> +struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
> +					char *fw_name);
> +void st_slim_rproc_put(struct st_slim_rproc *slim_rproc);
> +
> +#endif
-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, Aug 26, 2016 at 03:56:40PM +0100, Peter Griffin wrote:
>  config STM32_DMA
>  	bool "STMicroelectronics STM32 DMA support"
>  	depends on ARCH_STM32
> @@ -567,7 +580,6 @@ config ZX_DMA
>  	help
>  	  Support the DMA engine for ZTE ZX296702 platform devices.
>  
> -
unrelated change?
> +	fdev->chans = devm_kzalloc(&pdev->dev,
> +				   fdev->nr_channels
> +				   * sizeof(struct st_fdma_chan), GFP_KERNEL);
devm_kcalloc()
> +	if (!fdev->chans)
> +		return -ENOMEM;
> +
> +	fdev->dev = &pdev->dev;
> +	fdev->drvdata = drvdata;
> +	platform_set_drvdata(pdev, fdev);
> +
> +	fdev->irq = platform_get_irq(pdev, 0);
> +	if (fdev->irq < 0) {
> +		dev_err(&pdev->dev, "Failed to get irq resource\n");
> +		return -EINVAL;
> +	}
> +
> +	ret = devm_request_irq(&pdev->dev, fdev->irq,
st_fdma_irq_handler, 0,
> +			       dev_name(&pdev->dev), fdev);
> +	if (ret) {
> +		dev_err(&pdev->dev, "Failed to request irq (%d)\n",
ret);
> +		goto err;
> +	}
> +
> +	fdev->slim_rproc = st_slim_rproc_alloc(pdev, fdev->fw_name);
> +	if (!fdev->slim_rproc) {
> +		ret = PTR_ERR(fdev->slim_rproc);
> +		dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n",
ret);
> +		goto err;
> +	}
> +
> +	/* Initialise list of FDMA channels */
> +	INIT_LIST_HEAD(&fdev->dma_device.channels);
> +	for (i = 0; i < fdev->nr_channels; i++) {
> +		struct st_fdma_chan *fchan = &fdev->chans[i];
> +
> +		fchan->fdev = fdev;
> +		fchan->vchan.desc_free = st_fdma_free_desc;
> +		vchan_init(&fchan->vchan, &fdev->dma_device);
this initialized a tasklet
> +static int st_fdma_remove(struct platform_device *pdev)
> +{
> +	struct st_fdma_dev *fdev = platform_get_drvdata(pdev);
> +
> +	devm_free_irq(&pdev->dev, fdev->irq, fdev);
> +	st_slim_rproc_put(fdev->slim_rproc);
> +	of_dma_controller_free(pdev->dev.of_node);
> +	dma_async_device_unregister(&fdev->dma_device);
and that vchan tasklet is not quisced here :(
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("STMicroelectronics FDMA engine driver");
> +MODULE_AUTHOR("Ludovic.barre <Ludovic.barre at st.com>");
> +MODULE_AUTHOR("Peter Griffin <peter.griffin at
linaro.org>");
No MODULE_ALIAS?

-- 
~Vinod