mmc: sdhci-of-esdhc: add support for signal voltage switch

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eSDHC supports signal voltage switch from 3.3v to 1.8v by
eSDHC_PROCTL[VOLT_SEL] bit. This bit changes the value of output
signal SDHC_VS, and there must be a control circuit out of eSDHC
to change the signal voltage according to SDHC_VS output signal.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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yangbo lu 2017-04-20 16:14:41 +08:00 • committed by Ulf Hansson

parent 19c3a0ef65

commit ea35645a3c

2 changed files with 75 additions and 0 deletions

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drivers/mmc/host/sdhci-esdhc.h

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74

drivers/mmc/host/sdhci-of-esdhc.c

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