Messages in this thread | | | Subject | Re: [PATCH v3 0/2] mmc: dw_mmc: controller reset support | From | Shawn Lin <> | Date | Wed, 30 Mar 2016 19:45:05 +0800 |
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+ Heiko On 2016/3/30 15:24, Guodong Xu wrote: > mmc controller registers may in abnormal state if mmc is used in > bootloader, eg. to load kernel from eMMC. Some controllers cann't > clear their registers when clk is set. They use dedicated reset > logics to do this. > > In this patch, a 'resets' property is added into dw_mmc dts > node. When driver does parse_dt and probe, it calls reset API to > deassert the 'reset' of dw_mmc host controller. When probe error or > remove, it calls reset API to assert it. > > Chip vendor's actual reset logics is implemented in reset driver, not > in dw_mmc code. > > Please also refer to Documentation/devicetree/bindings/reset/reset.txt > > Guodong Xu (2): > Documentation: synopsys-dw-mshc: add binding for resets > mmc: dw_mmc: add resets support to dw_mmc > > .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 4 ++++ > drivers/mmc/host/dw_mmc.c | 20 +++++++++++++++++++- > include/linux/mmc/dw_mmc.h | 6 ++++-- > 3 files changed, 27 insertions(+), 3 deletions(-) >
-- Best Regards Shawn Lin
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