ARM: dts: Add HS400 support for exynos5420 and exynos5800

HS400 timing values are added for SMDK5420, exynos5420-peach-pit
and exynos5800-peach-pi boards. This also adds RCLK GPIO line,
this gpio should be in pull-down state.
This also enables HS400 on peach-pi and this updates the clock
frequency to 800MHz to be set as input clock to controller.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
[alim.akhtar@samsung.com: addressed review comments]
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -699,8 +699,10 @@ &mmc_0 {
 	samsung,dw-mshc-ciu-div = <3>;
 	samsung,dw-mshc-sdr-timing = <0 4>;
 	samsung,dw-mshc-ddr-timing = <0 2>;
+	samsung,dw-mshc-hs400-timing = <0 2>;
+	samsung,read-strobe-delay = <90>;
 	pinctrl-names = "default";
-	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8>;
+	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8 &sd0_rclk>;
 	bus-width = <8>;
 };
 

arch/arm/boot/dts/exynos5420-pinctrl.dtsi

@@ -201,6 +201,13 @@ sd1_clk: sd1-clk {
 			samsung,pin-drv = <3>;
 		};
 
+		sd0_rclk: sd0-rclk {
+			samsung,pins = "gpc0-7";
+			samsung,pin-function = <2>;
+			samsung,pin-pud = <1>;
+			samsung,pin-drv = <3>;
+		};
+
 		sd1_cmd: sd1-cmd {
 			samsung,pins = "gpc1-1";
 			samsung,pin-function = <2>;

arch/arm/boot/dts/exynos5420-smdk5420.dts

@@ -80,8 +80,11 @@ mmc@12200000 {
 		samsung,dw-mshc-ciu-div = <3>;
 		samsung,dw-mshc-sdr-timing = <0 4>;
 		samsung,dw-mshc-ddr-timing = <0 2>;
+		samsung,dw-mshc-hs400-timing = <0 2>;
+		samsung,read-strobe-delay = <90>;
 		pinctrl-names = "default";
-		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8>;
+		pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8
+			     &sd0_rclk>;
 		bus-width = <8>;
 		cap-mmc-highspeed;
 	};

arch/arm/boot/dts/exynos5800-peach-pi.dts

@@ -654,15 +654,18 @@ &mmc_0 {
 	num-slots = <1>;
 	broken-cd;
 	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
 	cap-mmc-highspeed;
 	non-removable;
 	card-detect-delay = <200>;
-	clock-frequency = <400000000>;
+	clock-frequency = <800000000>;
 	samsung,dw-mshc-ciu-div = <3>;
 	samsung,dw-mshc-sdr-timing = <0 4>;
 	samsung,dw-mshc-ddr-timing = <0 2>;
+	samsung,dw-mshc-hs400-timing = <0 2>;
+	samsung,read-strobe-delay = <90>;
 	pinctrl-names = "default";
-	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8>;
+	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8 &sd0_rclk>;
 	bus-width = <8>;
 };