[1/4] mmc: core: Add DT bindings for eMMC hardware reset support

Commit Message

Chaotian Jing (井朝天) Oct. 13, 2015, 9:37 a.m. UTC

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 <[e-mail]>
---
 Documentation/devicetree/bindings/mmc/mmc.txt | 1 +
 drivers/mmc/core/host.c                       | 2 ++
 2 files changed, 3 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 0384fc3..f693baf 100644
--- 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 abd933b..04fdc2f 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -507,6 +507,8 @@  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"))