Hi Guodong, On 08/12/2016 05:51 PM, Guodong Xu wrote: > mmc host 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 > triiger 'reset' of dwmmc 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 > > Changelog: > v5: > * rebase onto https://github.com/jh80chung/dw-mmc > v4: > * add reset_control_assert() and usleep() before calling _deassert(). > > Guodong Xu (2): > Documentation: synopsys-dw-mshc: add binding for resets > mmc: dw_mmc: add reset support to dwmmc host controller Applied on my dw-mmc tree. Thanks! Best Regards, Jaehoon Chung > > .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 4 ++++ > drivers/mmc/host/dw_mmc.c | 23 +++++++++++++++++++++- > include/linux/mmc/dw_mmc.h | 2 ++ > 3 files changed, 28 insertions(+), 1 deletion(-) > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
