arm64: dts: exynos: add initial support for Samsung Galaxy S22+

Samsung Galaxy S22+ (SM-S906B), codenamed g0s, is a mobile phone from
2022. It features 8GB RAM, 128/256GB UFS 3.1, Exynos 2200 SoC and a
1080x2340 Dynamic AMOLED display.

This device has an issue where cpu2 and cpu3 fail to come up
consistently, which leads to a hang later in the boot process. Disable
them until the problem is figured out.

This initial device tree configures simple-framebuffer, volume-up key and
usb.

Signed-off-by: Ivaylo Ivanov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: ivoszbg

arch/arm64/boot/dts/exynos/Makefile

@@ -2,6 +2,7 @@
 subdir-y += google
 
 dtb-$(CONFIG_ARCH_EXYNOS) += \
+	exynos2200-g0s.dtb		\
 	exynos5433-tm2.dtb		\
 	exynos5433-tm2e.dtb		\
 	exynos7-espresso.dtb		\

arch/arm64/boot/dts/exynos/exynos2200-g0s.dts

@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Samsung Galaxy S22+ (g0s/SM-S906B) device tree source
+ *
+ * Copyright (c) 2025, Ivaylo Ivanov <[email protected]>
+ */
+
+/dts-v1/;
+#include "exynos2200.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	model = "Samsung Galaxy S22+ (SM-S906B)";
+	compatible = "samsung,g0s", "samsung,exynos2200";
+	chassis-type = "handset";
+
+	chosen {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		framebuffer: framebuffer {
+			compatible = "simple-framebuffer";
+			memory-region = <&cont_splash_mem>;
+			width = <1080>;
+			height = <2340>;
+			stride = <(1080 * 4)>;
+			format = "a8r8g8b8";
+		};
+	};
+
+	/*
+	 * RTC clock (XrtcXTI); external, must be 32.768 kHz.
+	 *
+	 * TODO: Remove this once RTC clock is implemented properly as part of
+	 *       PMIC driver.
+	 */
+	rtcclk: clock-rtcclk {
+		compatible = "fixed-clock";
+		clock-output-names = "rtcclk";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-0 = <&key_volup>;
+		pinctrl-names = "default";
+
+		volup-key {
+			label = "Volume Up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&gpa3 0 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+		};
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x80000000>,
+		      <0x8 0x80000000 0x1 0x7e000000>;
+	};
+
+	/* TODO: Remove this once PMIC is implemented  */
+	reg_dummy: regulator-0 {
+		compatible = "regulator-fixed";
+		regulator-name = "dummy_reg";
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		cont_splash_mem: framebuffer@f6200000 {
+			reg = <0x0 0xf6200000 0x0 (1080 * 2340 * 4)>;
+			no-map;
+		};
+
+		debug_kinfo_reserved: debug-kinfo-reserved@fcfff000 {
+			reg = <0x0 0xfcfff000 0x0 0x1000>;
+			no-map;
+		};
+
+		log_itmon: log-itmon@fffe0000 {
+			reg = <0x0 0xfffe0000 0x0 0x20000>;
+			no-map;
+		};
+	};
+};
+
+&cmu_hsi0 {
+	clocks = <&xtcxo>,
+		 <&rtcclk>,
+		 <&cmu_top CLK_DOUT_CMU_HSI0_NOC>,
+		 <&cmu_top CLK_DOUT_CMU_HSI0_DPGTC>,
+		 <&cmu_top CLK_DOUT_CMU_HSI0_DPOSC>,
+		 <&cmu_top CLK_DOUT_CMU_HSI0_USB32DRD>;
+	clock-names = "oscclk", "rtcclk", "noc", "dpgtc", "dposc", "usb";
+};
+
+/*
+ * cpu2 and cpu3 fail to come up consistently, which leads to a hang later
+ * in the boot process. Disable them until the issue is figured out.
+ */
+&cpu2 {
+	status = "fail";
+};
+
+&cpu3 {
+	status = "fail";
+};
+
+&ext_26m {
+	clock-frequency = <26000000>;
+};
+
+&ext_200m {
+	clock-frequency = <200000000>;
+};
+
+&mct_peris {
+	status = "okay";
+};
+
+&pinctrl_alive {
+	key_volup: key-volup-pins {
+		samsung,pins = "gpa3-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
+		samsung,pin-drv = <EXYNOS7_PIN_DRV_LV4>;
+	};
+};
+
+&ppi_cluster0 {
+	affinity = <&cpu0 &cpu1>;
+};
+
+&usb {
+	/* TODO: Replace these once PMIC is implemented  */
+	vdd10-supply = <&reg_dummy>;
+	vdd33-supply = <&reg_dummy>;
+	status = "okay";
+};
+
+&usb32drd {
+	status = "okay";
+};
+
+&usb_dwc3 {
+	dr_mode = "otg";
+	usb-role-switch;
+	role-switch-default-mode = "peripheral";
+	maximum-speed = "high-speed";
+};
+
+&usb_hsphy {
+	/* TODO: Replace these once PMIC is implemented  */
+	vdda12-supply = <&reg_dummy>;
+	vdd-supply = <&reg_dummy>;
+	status = "okay";
+};
+
+&xtcxo {
+	clock-frequency = <76800000>;
+};