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Commit c373eb48 authored by Seungwon Jeon's avatar Seungwon Jeon Committed by Chris Ball
Browse files

mmc: core: add DT bindings for eMMC HS400 1.8/1.2V 



Provide the option to configure these speed modes per host,
for those host driver's that can't distinguish this in runtime.
Specially, if host can support HS400, it means that host can also
support HS200.

Signed-off-by: default avatarSeungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent 0a5b6438

Documentation/devicetree/bindings/mmc/mmc.txt

+2 −0
Original line number Diff line number Diff line
@@ -38,6 +38,8 @@ Optional properties: 
- mmc-highspeed-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported

- mmc-hs200-1_8v: eMMC HS200 mode(1.8V I/O) is supported

- mmc-hs200-1_2v: eMMC HS200 mode(1.2V I/O) is supported

- mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported

- mmc-hs400-1_2v: eMMC HS400 mode(1.2V I/O) is supported



*NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line

polarity properties, we have to fix the meaning of the "normal" and "inverted"

drivers/mmc/core/host.c

+4 −0
Original line number Diff line number Diff line
@@ -447,6 +447,10 @@ int mmc_of_parse(struct mmc_host *host) 
		host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;

	if (of_find_property(np, "mmc-hs200-1_2v", &len))

		host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;

	if (of_find_property(np, "mmc-hs400-1_8v", &len))

		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;

	if (of_find_property(np, "mmc-hs400-1_2v", &len))

		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;



	return 0;