mmc: core: Add DT bindings for eMMC hardware reset support

Sometime only need set MMC_CAP_HW_RESET for one of MMC hosts,
So set it in device tree is better.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 0384fc3f64e83f954183afca1c899fe65966a481..f693baf87264d6525b105c0eb244730111b47820 100644 (file)
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -37,6 +37,7 @@ Optional properties:
 - 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-mmc-hw-reset: eMMC hardware reset is supported
 - cap-sdio-irq: enable SDIO IRQ signalling on this interface
 - full-pwr-cycle: full power cycle of the card is supported
 - mmc-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 970e6906930b0d8ebce9f0434f64c11f74eb376a..da950c44204d27d6db8cd5a2d56b6b3e88e27c09 100644 (file)
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -267,6 +267,8 @@ int mmc_of_parse(struct mmc_host *host)
                host->caps |= MMC_CAP_UHS_DDR50;
        if (of_property_read_bool(np, "cap-power-off-card"))
                host->caps |= MMC_CAP_POWER_OFF_CARD;
+       if (of_property_read_bool(np, "cap-mmc-hw-reset"))
+               host->caps |= MMC_CAP_HW_RESET;
        if (of_property_read_bool(np, "cap-sdio-irq"))
                host->caps |= MMC_CAP_SDIO_IRQ;
        if (of_property_read_bool(np, "full-pwr-cycle"))