Merge pull request #359 from nascs/waveshare35_lcd_5acd

feat: add waveshare lcd for 5a/5c/5d

Author: RadxaYuntian

arch/arm64/boot/dts/rockchip/overlays/Makefile

@@ -424,6 +424,8 @@ dtb-$(CONFIG_CLK_RK3588) += \
 	rk3588-spi1-m2-cs1-spidev.dtbo \
 	rk3588-spi2-m1-cs0-spidev.dtbo \
 	rk3588-spi4-m2-cs0-spidev.dtbo \
+	rk3588-spi4-m2-cs0-waveshare35.dtbo \
+	rk3588-spi4-m2-cs0-waveshare35b.dtbo \
 	rk3588-uart1-m2.dtbo \
 	rk3588-uart2-m0.dtbo \
 	rk3588-uart2-m2.dtbo \

arch/arm64/boot/dts/rockchip/overlays/rk3588-spi4-m2-cs0-waveshare35.dts

@@ -0,0 +1,32 @@
+#define DISPLAY_SPI spi4
+#include "waveshare35-lcd.dtsi"
+
+/ {
+	metadata {
+		title = "Enable Waveshare 3.5inch RPi LCD (C) on SPI4";
+		compatible = "radxa,rock-5a", "radxa,rock-5c", "radxa,rock-5d";
+		category = "misc";
+		exclusive = "GPIO1_A2", "GPIO1_A0", "GPIO1_A1", "GPIO1_A3", "GPIO1_B0", "GPIO1_B5", "GPIO4_B3";
+		description = "Enable Waveshare 3.5inch RPi LCD (C) on SPI4.
+Touch panel is currently unsupported.";
+	};
+};
+
+&DISPLAY_SPI {
+	pinctrl-0 = <&spi4m2_pins>;
+	num-cs = <2>;
+	cs-gpios = <&gpio1 RK_PA3 GPIO_ACTIVE_LOW
+			&gpio1 RK_PA4 GPIO_ACTIVE_LOW>;
+};
+
+&ili9486 {
+	reset-gpios = <&gpio1 RK_PB5 GPIO_ACTIVE_LOW>;
+	dc-gpios = <&gpio1 RK_PB0 GPIO_ACTIVE_HIGH>;
+};
+
+&ads7846 {
+	status = "disabled";
+	interrupt-parent = <&gpio4>;
+	interrupts = <RK_PB3 IRQ_TYPE_EDGE_FALLING>;
+	pendown-gpio = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
+};

arch/arm64/boot/dts/rockchip/overlays/rk3588-spi4-m2-cs0-waveshare35b.dts

@@ -0,0 +1,25 @@
+#include "rk3588-spi4-m2-cs0-waveshare35.dts"
+
+/ {
+	metadata {
+		title = "Enable Waveshare 3.5inch RPi LCD (B) on SPI4";
+		description = "Enable Waveshare 3.5inch RPi LCD (B) on SPI4.";
+	};
+};
+
+&ili9486 {
+	init = <0x10000b0 0x0
+			0x1000011
+			0x20000ff
+			0x1000021
+			0x100003a 0x55
+			0x10000c2 0x33
+			0x10000c5 0x0 0x1e 0x80
+			0x1000036 0x28
+			0x10000b1 0xb0
+			0x10000e0 0x0 0x13 0x18 0x4 0xf 0x6 0x3a 0x56 0x4d 0x3 0xa 0x6 0x30 0x3e 0xf
+			0x10000e1 0x0 0x13 0x18 0x1 0x11 0x6 0x38 0x34 0x4d 0x6 0xd 0xb 0x31 0x37 0xf
+			0x1000011
+			0x20000ff
+			0x1000029>;
+};