arm64: dts: exynos: add minimal support for exynosautov9 sadk board

SADK(Samsung Automotive Development Kit) is the development kit to
evaluate Exynos Auto v9 SoC. It has 16GB LPDDR4 DRAM and two
256GB Samsung UFS. This patch enables only serial console and ufs0
device.
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Link: https://lore.kernel.org/r/20211012002314.38965-4-chanho61.park@samsung.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml

@@ -199,6 +199,12 @@ properties:
               - samsung,exynos7-espresso        # Samsung Exynos7 Espresso
           - const: samsung,exynos7
 
+      - description: Exynos Auto v9 based boards
+        items:
+          - enum:
+              - samsung,exynosautov9-sadk   # Samsung Exynos Auto v9 SADK
+          - const: samsung,exynosautov9
+
 required:
   - compatible
 

arch/arm64/boot/dts/exynos/Makefile

@@ -2,4 +2,5 @@
 dtb-$(CONFIG_ARCH_EXYNOS) += \
 	exynos5433-tm2.dtb	\
 	exynos5433-tm2e.dtb	\
-	exynos7-espresso.dtb
+	exynos7-espresso.dtb	\
+	exynosautov9-sadk.dtb

arch/arm64/boot/dts/exynos/exynosautov9-sadk.dts

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Samsung ExynosAutov9 SADK board device tree source
+ *
+ * Copyright (c) 2021 Samsung Electronics Co., Ltd.
+ *
+ */
+
+/dts-v1/;
+#include "exynosautov9.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	model = "Samsung ExynosAuto v9 SADK board";
+	compatible = "samsung,exynosautov9-sadk", "samsung,exynosautov9";
+
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	aliases {
+		serial0 = &serial_0;
+	};
+
+	chosen {
+		stdout-path = &serial_0;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x77000000>,
+		      <0x8 0x80000000 0x1 0x7ba00000>,
+		      <0xa 0x00000000 0x2 0x00000000>;
+	};
+
+	ufs_0_fixed_vcc_reg: regulator-0 {
+		compatible = "regulator-fixed";
+		regulator-name = "ufs-vcc";
+		gpio = <&gpq0 1 GPIO_ACTIVE_HIGH>;
+		regulator-boot-on;
+		enable-active-high;
+	};
+};
+
+&serial_0 {
+	status = "okay";
+};
+
+&ufs_0_phy {
+	status = "okay";
+};
+
+&ufs_0 {
+	status = "okay";
+	vcc-supply = <&ufs_0_fixed_vcc_reg>;
+	vcc-fixed-regulator;
+};