arm64: dts: imx8mm-nitrogen-r2: add ecspi2 support

Add the description for ecspi2 support.
Signed-off-by: Adrien Grassein <adrien.grassein@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-nitrogen-r2.dts

@@ -74,6 +74,17 @@ &A53_3 {
 	cpu-supply = <&reg_buck3>;
 };
 
+/* J15 */
+&ecspi2 {
+	assigned-clocks = <&clk IMX8MM_CLK_ECSPI2>;
+	assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_40M>;
+	assigned-clock-rates = <40000000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ecspi2>;
+	cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
 &fec1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_fec1>;
@@ -390,6 +401,15 @@ &iomuxc {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_hog>;
 
+	pinctrl_ecspi2: ecspi2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_ECSPI2_SS0_GPIO5_IO13	0x140
+			MX8MM_IOMUXC_ECSPI2_MISO_ECSPI2_MISO	0x19
+			MX8MM_IOMUXC_ECSPI2_SCLK_ECSPI2_SCLK	0x19
+			MX8MM_IOMUXC_ECSPI2_MOSI_ECSPI2_MOSI	0x19
+		>;
+	};
+
 	pinctrl_fec1: fec1grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_ENET_MDC_ENET1_MDC			0x3