mmc: core: Add ->hs400_prepare_ddr() callback

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Some eMMC controllers need specific settings for HS400 mode before the
speed mode can be switched to DDR mode, during the HS400 initialization
sequence. For that reason, let's introduce a new host callback,
->hs400_prepare_ddr() and invoked it just before switching to DDR mode.

Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Yinbo Zhu 2018-11-23 11:15:33 +08:00 • committed by Ulf Hansson

parent 52b5f5cfa2

commit cc14eec088

2 changed files with 6 additions and 0 deletions

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3

drivers/mmc/core/mmc.c

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3

include/linux/mmc/host.h

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