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: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <chris@printf.net>

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 458b57f199afe6d56eb425ee4cbdceb532c28b53..bd2ce67dbb9e7cf0672ba4d72d2254c016a5441a 100644 (file)
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -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

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 49bc403e31f02f7f10358d33c49030f9fddcf0d1..2644d91fd3364cd744b83f8e3d1e3edd21d3a827 100644 (file)
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -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))