ARM: dts: exynos: Add support for UHS-I SD cards on Arndale Octa

The Exynos5420's Mobile Storage Host supports SD cards in UHS-I standard
(SD specification v3.0), with 1.8 V signaling in SD UHS DDR50.  Adjust
the regulator and add necessary capability properties.  Change the SDR
and DDR timings to match values in Insignal v3.4 Android kernel.

Tested with SD UHS-I card in SD UHS DDR50 mode.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index b12286d545b6a8d1a4222af9463b8da481623208..de0a6840dfbc925005f60b2cb4708133151006c8 100644 (file)
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -441,7 +441,7 @@
 
                        ldo13_reg: LDO13 {
                                regulator-name = "PVDD_APIO_MMCOFF_2V8";
-                               regulator-min-microvolt = <2800000>;
+                               regulator-min-microvolt = <1800000>;
                                regulator-max-microvolt = <2800000>;
                        };
 
@@ -701,14 +701,17 @@
        status = "okay";
        card-detect-delay = <200>;
        samsung,dw-mshc-ciu-div = <3>;
-       samsung,dw-mshc-sdr-timing = <2 3>;
-       samsung,dw-mshc-ddr-timing = <1 2>;
+       samsung,dw-mshc-sdr-timing = <0 4>;
+       samsung,dw-mshc-ddr-timing = <0 2>;
        pinctrl-names = "default";
        pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_cd &sd2_bus1 &sd2_bus4>;
        vmmc-supply = <&ldo19_reg>;
        vqmmc-supply = <&ldo13_reg>;
        bus-width = <4>;
        cap-sd-highspeed;
+       sd-uhs-sdr50;
+       sd-uhs-sdr104;
+       sd-uhs-ddr50;
 };
 
 &pinctrl_0 {