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On Tue, Dec 23, 2014 at 06:39:55PM +0800, Vince Hsu wrote: > The flush operation of memory clients is needed for various IP blocks in > the Tegra SoCs to perform a clean reset. > > Signed-off-by: Vince Hsu <vinceh at nvidia.com> > --- > drivers/memory/tegra/mc.c | 21 +++++++++++++++++++++ > include/soc/tegra/mc.h | 23 ++++++++++++++++++++++- > 2 files changed,

...set the FLUSH_ENABLE bit for the client > 2) poll the FLUSH_DONE bit for the client > 3) assert reset to the client using the CAR > 4) deassert reset to the client using the CAR > 5) clear the FLUSH_ENABLE bit for the client > Do we ever need to do this outside a powergating or railgating sequence? > This is really inconvenient because we can't flush the client using a > single operation. So I think we'll need two functions here, something > like: tegra_mc_flush_enable/disable(), or tegra_mc_flush_{,de}assert(). > Or maybe even: tegra_mc_reset_{,de}assert() t...