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| author | yangbo lu <yangbo.lu@nxp.com> | 2017-04-20 16:14:41 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:42:25 +0200 |
| commit | ea35645a3c66a74af92d3bbb4eb131220fc3e58a (patch) | |
| tree | 34a5caeec1bb499cd1b6da46864a4a2706cf4204 /drivers/mmc/host/sdhci-esdhc.h | |
| parent | 19c3a0ef65adf090cb592dfe3e575f40322c88d8 (diff) | |
| download | op-kernel-dev-ea35645a3c66a74af92d3bbb4eb131220fc3e58a.zip op-kernel-dev-ea35645a3c66a74af92d3bbb4eb131220fc3e58a.tar.gz | |
mmc: sdhci-of-esdhc: add support for signal voltage switch
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>
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc.h')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h index 5343fc0..6869567 100644 --- a/drivers/mmc/host/sdhci-esdhc.h +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -37,6 +37,7 @@ /* Protocol Control Register */ #define ESDHC_PROCTL 0x28 +#define ESDHC_VOLT_SEL 0x00000400 #define ESDHC_CTRL_4BITBUS (0x1 << 1) #define ESDHC_CTRL_8BITBUS (0x2 << 1) #define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1) |
