dts: rk3399: add pinctrl for sdmmc

This patch add pinctrl for sdcard which may not be initialized before
uboot.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/rk3399.dtsi b/arch/arm/dts/rk3399.dtsi
index a4c6e27..6d82078 100644
--- a/arch/arm/dts/rk3399.dtsi
+++ b/arch/arm/dts/rk3399.dtsi
@@ -175,6 +175,8 @@
 		clocks = <&cru SCLK_SDMMC>, <&cru HCLK_SDMMC>,
 			 <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
 		clock-names = "ciu", "biu", "ciu-drive", "ciu-sample";
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdmmc_clk>;
 		fifo-depth = <0x100>;
 		status = "disabled";
 	};
@@ -771,6 +773,41 @@
 			};
 		};
 
+		sdmmc {
+			sdmmc_bus1: sdmmc-bus1 {
+				rockchip,pins =
+					<4 8 RK_FUNC_1 &pcfg_pull_up>;
+			};
+
+			sdmmc_bus4: sdmmc-bus4 {
+				rockchip,pins =
+					<4 8 RK_FUNC_1 &pcfg_pull_up>,
+					<4 9 RK_FUNC_1 &pcfg_pull_up>,
+					<4 10 RK_FUNC_1 &pcfg_pull_up>,
+					<4 11 RK_FUNC_1 &pcfg_pull_up>;
+			};
+
+			sdmmc_clk: sdmmc-clk {
+				rockchip,pins =
+					<4 12 RK_FUNC_1 &pcfg_pull_none>;
+			};
+
+			sdmmc_cmd: sdmmc-cmd {
+				rockchip,pins =
+					<4 13 RK_FUNC_1 &pcfg_pull_up>;
+			};
+
+			sdmmc_cd: sdmcc-cd {
+				rockchip,pins =
+					<0 7 RK_FUNC_1 &pcfg_pull_up>;
+			};
+
+			sdmmc_wp: sdmmc-wp {
+				rockchip,pins =
+					<0 8 RK_FUNC_1 &pcfg_pull_up>;
+			};
+		};
+
 		spdif {
 			spdif_bus: spdif-bus {
 				rockchip,pins =