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>

2 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 458b57f199af..bd2ce67dbb9e 100644
--- 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 49bc403e31f0..2644d91fd336 100644
--- 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))