mmc: core: Handle card shutdown from mmc_bus
Considering shutdown of the card, the responsibility to initate this sequence shall be driven from the mmc_bus. This patch enables the mmc_bus to handle this sequence properly. A new .shutdown callback is added in the mmc_driver struct which is used to shutdown the blk device. Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org> Signed-off-by: NChris Ball <cjb@laptop.org>
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