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

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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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 9dce540771fb115f9b1eb8e0d73dca574589595e..3c18001dfd5d75fe91038926fd6da8f98637fe88 100644 (file)
--- 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 fdea825dbb240238b66531214b7761bda4b698eb..95cceae96944c17c19dbb4e9916119a72fb2bce6 100644 (file)
--- 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;