arm64: dts: exynos: Add initial support for Samsung Galaxy S20 FE (r8s)

Add initial support for the Samsung Galaxy S20 FE (r8s/SM-G780F) device.
Its launch was in 2020 and also based on the Exynos 990 SoC.
It is only configured with 6GB of RAM, although storage options may differ.

This device tree adds support for the following:

- SimpleFB
- 6GB RAM
- Buttons

Signed-off-by: Denzeel Oliva <wachiturroxd150@gmail.com>
Link: https://lore.kernel.org/r/20241114143636.374-3-wachiturroxd150@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

2 files changed, 116 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
index 7a934499b235..948a2c6cb540 100644
--- a/arch/arm64/boot/dts/exynos/Makefile
+++ b/arch/arm64/boot/dts/exynos/Makefile
@@ -9,5 +9,6 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
 	exynos850-e850-96.dtb		\
 	exynos8895-dreamlte.dtb		\
 	exynos990-c1s.dtb		\
+	exynos990-r8s.dtb               \
 	exynosautov9-sadk.dtb		\
 	exynosautov920-sadk.dtb
diff --git a/arch/arm64/boot/dts/exynos/exynos990-r8s.dts b/arch/arm64/boot/dts/exynos/exynos990-r8s.dts
new file mode 100644
index 000000000000..6bae3c0ecc1c
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/exynos990-r8s.dts
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Samsung Galaxy S20 FE (r8s/SM-G780F) device tree source
+ *
+ * Copyright (c) 2024, Denzeel Oliva <wachiturroxd150@gmail.com>
+ */
+
+/dts-v1/;
+#include "exynos990.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	model = "Samsung Galaxy S20 FE";
+	compatible = "samsung,r8s", "samsung,exynos990";
+
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	chosen {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		framebuffer0: framebuffer@f1000000 {
+			compatible = "simple-framebuffer";
+			reg = <0 0xf1000000 0 (1080 * 2400 * 4)>;
+			width = <1080>;
+			height = <2400>;
+			stride = <(1080 * 4)>;
+			format = "a8r8g8b8";
+		};
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x3ab00000>,
+		      /* Memory hole */
+		      <0x0 0xc1200000 0x0 0x1ee00000>,
+		      /* Memory hole */
+		      <0x0 0xe1900000 0x0 0x1e700000>,
+		      /* Memory hole - last block */
+		      <0x8 0x80000000 0x0 0xc0000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		cont_splash_mem: framebuffer@f1000000 {
+			reg = <0 0xf1000000 0 0x13c6800>;
+			no-map;
+		};
+
+		abox_reserved: audio@f7fb0000 {
+			reg = <0 0xf7fb0000 0 0x2a50000>;
+			no-map;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-0 = <&key_power &key_voldown &key_volup>;
+		pinctrl-names = "default";
+
+		power-key {
+			label = "Power";
+			linux,code = <KEY_POWER>;
+			gpios = <&gpa2 4 GPIO_ACTIVE_LOW>;
+			wakeup-source;
+		};
+
+		voldown-key {
+			label = "Volume Down";
+			linux,code = <KEY_VOLUMEDOWN>;
+			gpios = <&gpa0 4 GPIO_ACTIVE_LOW>;
+		};
+
+		volup-key {
+			label = "Volume Up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&gpa0 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&oscclk {
+	clock-frequency = <26000000>;
+};
+
+&pinctrl_alive {
+	key_power: key-power-pins {
+		samsung,pins = "gpa2-4";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+
+	key_voldown: key-voldown-pins {
+		samsung,pins = "gpa0-4";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+
+	key_volup: key-volup-pins {
+		samsung,pins = "gpa0-3";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+};