arm64: dts: sparx5: Add spi-nand devices

This patch add spi-nand DT nodes to the applicable Sparx5 boards.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Link: https://lore.kernel.org/r/20200824203010.2033-7-lars.povlsen@microchip.com

arch/arm64/boot/dts/microchip/sparx5.dtsi

@@ -206,6 +206,26 @@
 			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 			#interrupt-cells = <2>;
 
+			cs1_pins: cs1-pins {
+				pins = "GPIO_16";
+				function = "si";
+			};
+
+			cs2_pins: cs2-pins {
+				pins = "GPIO_17";
+				function = "si";
+			};
+
+			cs3_pins: cs3-pins {
+				pins = "GPIO_18";
+				function = "si";
+			};
+
+			si2_pins: si2-pins {
+				pins = "GPIO_39", "GPIO_40", "GPIO_41";
+				function = "si2";
+			};
+
 			uart_pins: uart-pins {
 				pins = "GPIO_10", "GPIO_11";
 				function = "uart";

arch/arm64/boot/dts/microchip/sparx5_nand.dtsi

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries.
+ */
+
+&gpio {
+	cs14_pins: cs14-pins {
+		pins = "GPIO_44";
+		function = "si";
+	};
+};
+
+&spi0 {
+	pinctrl-0 = <&si2_pins>;
+	pinctrl-names = "default";
+	spi@e {
+		compatible = "spi-mux";
+		mux-controls = <&mux>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <14>; /* CS14 */
+		spi-flash@6 {
+			compatible = "spi-nand";
+			pinctrl-0 = <&cs14_pins>;
+			pinctrl-names = "default";
+			reg = <0x6>; /* SPI2 */
+			spi-max-frequency = <42000000>;
+			rx-sample-delay-ns = <7>;  /* Tune for speed */
+		};
+	};
+};

arch/arm64/boot/dts/microchip/sparx5_pcb125.dts

@@ -53,6 +53,20 @@
 			reg = <0x9>;	/* SPI */
 		};
 	};
+	spi@1 {
+		compatible = "spi-mux";
+		mux-controls = <&mux 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <1>; /* CS1 */
+		spi-flash@9 {
+			compatible = "spi-nand";
+			pinctrl-0 = <&cs1_pins>;
+			pinctrl-names = "default";
+			spi-max-frequency = <8000000>;
+			reg = <0x9>;	/* SPI */
+		};
+	};
 };
 
 &i2c1 {

arch/arm64/boot/dts/microchip/sparx5_pcb134.dts

@@ -5,6 +5,7 @@
 
 /dts-v1/;
 #include "sparx5_pcb134_board.dtsi"
+#include "sparx5_nand.dtsi"
 
 / {
 	model = "Sparx5 PCB134 Reference Board (NAND)";

arch/arm64/boot/dts/microchip/sparx5_pcb135.dts

@@ -5,6 +5,7 @@
 
 /dts-v1/;
 #include "sparx5_pcb135_board.dtsi"
+#include "sparx5_nand.dtsi"
 
 / {
 	model = "Sparx5 PCB135 Reference Board (NAND)";