diff mbox

mmc: core: add DT bindings for eMMC HS400 1.8/1.2V

Message ID 000d01cf44f9$f0d2dc50$d27894f0$%jun@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Seungwon Jeon March 21, 2014, 11:37 a.m. UTC 
Provide the option to configure these speed modes per host,
for those host driver's that can't distinguish this in runtime.
Specially, if host can support HS400, it means that host can also
support HS200.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
---
Note:
	Depending on [PATCH v3 5/5] mmc: add support for HS400 mode of eMMC5.0

 Documentation/devicetree/bindings/mmc/mmc.txt |    2 ++
 drivers/mmc/core/host.c                       |    4 ++++
 2 files changed, 6 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 9dce540..3c18001 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -38,6 +38,8 @@  Optional properties:
 - mmc-highspeed-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported
 - mmc-hs200-1_8v: eMMC HS200 mode(1.8V I/O) is supported
 - mmc-hs200-1_2v: eMMC HS200 mode(1.2V I/O) is supported
+- mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported
+- mmc-hs400-1_2v: eMMC HS400 mode(1.2V I/O) is supported
 
 *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line
 polarity properties, we have to fix the meaning of the "normal" and "inverted"
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 453573d..4e35043 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -447,6 +447,10 @@  int mmc_of_parse(struct mmc_host *host)
 		host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;
 	if (of_find_property(np, "mmc-hs200-1_2v", &len))
 		host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
+	if (of_find_property(np, "mmc-hs400-1_8v", &len))
+		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
+	if (of_find_property(np, "mmc-hs400-1_2v", &len))
+		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
 
 	return 0;