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Commit 321bd41d authored by Jaehoon Chung's avatar Jaehoon Chung Committed by Chris Ball
Browse files

mmc: core: Add DT bindings for eMMC HS200 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.

Signed-off-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Acked-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent c0baf848

Documentation/devicetree/bindings/mmc/mmc.txt

+2 −0
Original line number Diff line number Diff line
@@ -36,6 +36,8 @@ Optional properties: 
- full-pwr-cycle: full power cycle of the card is supported

- mmc-highspeed-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported

- 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



*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
@@ -443,6 +443,10 @@ int mmc_of_parse(struct mmc_host *host) 
		host->caps |= MMC_CAP_1_8V_DDR;

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

		host->caps |= MMC_CAP_1_2V_DDR;

	if (of_find_property(np, "mmc-hs200-1_8v", &len))

		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;



	return 0;