arm: dts: imx7d-sdb: add spi gpio node

Add spi gpio node for 74LV595.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/dts/imx7d-sdb.dts

@@ -16,4 +16,39 @@
 		reg = <0x80000000 0x80000000>;
 	};
 
+	spi4 {
+		compatible = "spi-gpio";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_spi1>;
+		status = "okay";
+		gpio-sck = <&gpio1 13 0>;
+		gpio-mosi = <&gpio1 9 0>;
+		cs-gpios = <&gpio1 12 0>;
+		num-chipselects = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		gpio_spi: gpio_spi@0 {
+			compatible = "fairchild,74hc595";
+			gpio-controller;
+			#gpio-cells = <2>;
+			reg = <0>;
+			registers-number = <1>;
+			registers-default = /bits/ 8 <0x74>; /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/
+			spi-max-frequency = <100000>;
+		};
+	};
+};
+
+&iomuxc {
+	imx7d-sdb {
+		pinctrl_spi1: spi1grp {
+			fsl,pins = <
+				MX7D_PAD_GPIO1_IO09__GPIO1_IO9	0x59
+				MX7D_PAD_GPIO1_IO12__GPIO1_IO12	0x59
+				MX7D_PAD_GPIO1_IO13__GPIO1_IO13	0x59
+			>;
+		};
+	};
+
 };