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mmc: sdhci: Add support for O2 eMMC HS200 mode
authorernest.zhang <ernest.zhang@bayhubtech.com>
Mon, 16 Jul 2018 06:26:51 +0000 (14:26 +0800)
committerUlf Hansson <ulf.hansson@linaro.org>
Mon, 30 Jul 2018 12:23:37 +0000 (14:23 +0200)
commit57322d542ffe01076c9df10d38e3ec0a58f9d83a
tree17e2327f1c98902e4ca887ef2deda61741987f7dtree
parent44350993d01c901cc201ef2663fd0fded2e03d06commit | diff
mmc: sdhci: Add support for O2 eMMC HS200 mode

When use eMMC as boot device, the eMMC signaling voltage is tied to 1.8v
fixed output voltage, bios can set o2 sd host controller PCI configuration
register 0x308 bit4 to 1 to let driver skip 3.3v signaling voltage and
direct use 1.8v singling voltage in eMMC initialize process.

Signed-off-by: ernest.zhang <ernest.zhang@bayhubtech.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
drivers/mmc/host/sdhci-pci-o2micro.c diff | blob | history
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