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Commit b66bd0e4 authored by Ulf Hansson's avatar Ulf Hansson Committed by Chris Ball
Browse files

mmc: core: Add DT bindings for SD card's UHS bus speed modes 



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 avatarUlf Hansson <ulf.hansson@linaro.org>
Acked-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent c42deffd

Documentation/devicetree/bindings/mmc/mmc.txt

+5 −0
Original line number Diff line number Diff line
@@ -26,6 +26,11 @@ Optional properties: 
  this system, even if the controller claims it is.

- cap-sd-highspeed: SD high-speed timing is supported

- cap-mmc-highspeed: MMC high-speed timing is supported

- sd-uhs-sdr12: SD UHS SDR12 speed is supported

- sd-uhs-sdr25: SD UHS SDR25 speed is supported

- sd-uhs-sdr50: SD UHS SDR50 speed is supported

- sd-uhs-sdr104: SD UHS SDR104 speed is supported

- sd-uhs-ddr50: SD UHS DDR50 speed is supported

- cap-power-off-card: powering off the card is safe

- cap-sdio-irq: enable SDIO IRQ signalling on this interface

- full-pwr-cycle: full power cycle of the card is supported

drivers/mmc/core/host.c

+10 −0
Original line number Diff line number Diff line
@@ -419,6 +419,16 @@ int mmc_of_parse(struct mmc_host *host) 
		host->caps |= MMC_CAP_SD_HIGHSPEED;

	if (of_find_property(np, "cap-mmc-highspeed", &len))

		host->caps |= MMC_CAP_MMC_HIGHSPEED;

	if (of_find_property(np, "sd-uhs-sdr12", &len))

		host->caps |= MMC_CAP_UHS_SDR12;

	if (of_find_property(np, "sd-uhs-sdr25", &len))

		host->caps |= MMC_CAP_UHS_SDR25;

	if (of_find_property(np, "sd-uhs-sdr50", &len))

		host->caps |= MMC_CAP_UHS_SDR50;

	if (of_find_property(np, "sd-uhs-sdr104", &len))

		host->caps |= MMC_CAP_UHS_SDR104;

	if (of_find_property(np, "sd-uhs-ddr50", &len))

		host->caps |= MMC_CAP_UHS_DDR50;

	if (of_find_property(np, "cap-power-off-card", &len))

		host->caps |= MMC_CAP_POWER_OFF_CARD;

	if (of_find_property(np, "cap-sdio-irq", &len))