board: lg: star: add Optimus 2X P990 support

The LG Optimus 2X is a touchscreen-based, slate-sized smartphone designed
and manufactured by LG that runs the Android operating system. The
Optimus 2X features a 4" WVGA display, an Nvidia Tegra 2 dual-core chip,
512 MB of RAM and extendable 8 GB of internal storage. UART-B is default
debug port.

Tested-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index c197e3b..32b698a 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -86,6 +86,7 @@
 	tegra20-asus-tf101.dtb \
 	tegra20-asus-tf101g.dtb \
 	tegra20-harmony.dtb \
+	tegra20-lg-star.dtb \
 	tegra20-medcom-wide.dtb \
 	tegra20-motorola-daytona.dtb \
 	tegra20-motorola-olympus.dtb \
diff --git a/arch/arm/dts/tegra20-lg-star.dts b/arch/arm/dts/tegra20-lg-star.dts
new file mode 100644
index 0000000..3045bc3
--- /dev/null
+++ b/arch/arm/dts/tegra20-lg-star.dts
@@ -0,0 +1,538 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include <dt-bindings/input/input.h>
+
+#include "tegra20.dtsi"
+
+/ {
+	model = "LG Optimus 2X (P990)";
+	compatible = "lg,star", "nvidia,tegra20";
+
+	chosen {
+		stdout-path = &uartb;
+	};
+
+	aliases {
+		i2c0 = &pwr_i2c;
+		i2c5 = &dcdc_i2c;
+
+		mmc0 = &sdmmc4;	/* eMMC */
+		mmc1 = &sdmmc3; /* uSD slot */
+
+		rtc0 = &pmic;
+		rtc1 = "/rtc@7000e000";
+
+		usb0 = &micro_usb;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x20000000>; /* 512 MB */
+	};
+
+	host1x@50000000 {
+		dc@54200000 {
+			rgb {
+				status = "okay";
+
+				port {
+					dpi_output: endpoint {
+						remote-endpoint = <&bridge_input>;
+						bus-width = <24>;
+					};
+				};
+			};
+		};
+	};
+
+	pinmux@70000014 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&state_default>;
+
+		state_default: pinmux {
+			crt {
+				nvidia,pins = "crtp";
+				nvidia,function = "crt";
+			};
+
+			dap1 {
+				nvidia,pins = "dap1";
+				nvidia,function = "dap1";
+			};
+
+			dap2 {
+				nvidia,pins = "dap2";
+				nvidia,function = "dap2";
+			};
+
+			dap3 {
+				nvidia,pins = "dap3";
+				nvidia,function = "dap3";
+			};
+
+			dap4 {
+				nvidia,pins = "dap4";
+				nvidia,function = "dap4";
+			};
+
+			displaya {
+				nvidia,pins = "lcsn", "ld0", "ld1", "ld10",
+						"ld11", "ld12", "ld13", "ld14",
+						"ld15", "ld16", "ld17", "ld2",
+						"ld3", "ld4", "ld5", "ld6",
+						"ld7", "ld8", "ld9", "ldc",
+						"ldi", "lhp0", "lhp1", "lhp2",
+						"lhs", "lm0", "lm1", "lpp",
+						"lpw0", "lpw1", "lpw2", "lsc0",
+						"lsc1", "lsck", "lsda", "lsdi",
+						"lspi", "lvp0", "lvp1", "lvs";
+				nvidia,function = "displaya";
+			};
+
+			gmi {
+				nvidia,pins = "ata", "atc", "atd", "ate",
+						"gmb", "irrx", "irtx";
+				nvidia,function = "gmi";
+			};
+
+			hdmi {
+				nvidia,pins = "hdint";
+				nvidia,function = "hdmi";
+			};
+
+			i2c {
+				nvidia,pins = "i2cp", "rm";
+				nvidia,function = "i2c";
+			};
+
+			i2c2 {
+				nvidia,pins = "pta";
+				nvidia,function = "i2c2";
+			};
+
+			i2c3 {
+				nvidia,pins = "dtf";
+				nvidia,function = "i2c3";
+			};
+
+			kbc {
+				nvidia,pins = "kbca", "kbcb", "kbcc", "kbce",
+						"kbcf";
+				nvidia,function = "kbc";
+			};
+
+			owr {
+				nvidia,pins = "owc";
+				nvidia,function = "owr";
+			};
+
+			plla-out {
+				nvidia,pins = "cdev1";
+				nvidia,function = "plla_out";
+			};
+
+			pllp-out4 {
+				nvidia,pins = "cdev2";
+				nvidia,function = "pllp_out4";
+			};
+
+			pwm {
+				nvidia,pins = "gpu";
+				nvidia,function = "pwm";
+			};
+
+			pwr-on {
+				nvidia,pins = "pmc";
+				nvidia,function = "pwr_on";
+			};
+
+			rtck {
+				nvidia,pins = "gpu7";
+				nvidia,function = "rtck";
+			};
+
+			sdio1 {
+				nvidia,pins = "sdio1";
+				nvidia,function = "sdio1";
+			};
+
+			sdio2 {
+				nvidia,pins = "kbcd";
+				nvidia,function = "sdio2";
+			};
+
+			sdio3 {
+				nvidia,pins = "sdb", "sdc", "sdd", "slxa",
+						"slxd", "slxk", "slxc";
+				nvidia,function = "sdio3";
+			};
+
+			sdio4 {
+				nvidia,pins = "atb", "gma", "gme";
+				nvidia,function = "sdio4";
+			};
+
+			spi1 {
+				nvidia,pins = "uda";
+				nvidia,function = "spi1";
+			};
+
+			spi2 {
+				nvidia,pins = "spia", "spib", "spic";
+				nvidia,function = "spi2";
+			};
+
+			spi2-alt {
+				nvidia,pins = "spid", "spie", "spig", "spih";
+				nvidia,function = "spi2_alt";
+			};
+
+			uarta {
+				nvidia,pins = "uaa", "uab";
+				nvidia,function = "uarta";
+			};
+
+			uartc {
+				nvidia,pins = "uca", "ucb";
+				nvidia,function = "uartc";
+			};
+
+			uartd {
+				nvidia,pins = "gmc";
+				nvidia,function = "uartd";
+			};
+
+			vi {
+				nvidia,pins = "dtc", "dtd";
+				nvidia,function = "vi";
+			};
+
+			vi-sensor-clk {
+				nvidia,pins = "csus";
+				nvidia,function = "vi_sensor_clk";
+			};
+
+			conf-lsda {
+				nvidia,pins = "lsda", "owc";
+				nvidia,pull = <TEGRA_PIN_PULL_UP>;
+				nvidia,tristate = <TEGRA_PIN_ENABLE>;
+			};
+
+			conf-ata {
+				nvidia,pins = "ata", "dtf", "gmb", "gmc",
+						"i2cp", "irrx", "kbca", "kbcc",
+						"kbcd", "kbce", "kbcf", "lcsn",
+						"ldc", "pta", "rm", "sdc",
+						"sdd", "spie", "spif", "spig",
+						"spih", "uaa", "uad", "uca",
+						"ucb", "pmce";
+				nvidia,pull = <TEGRA_PIN_PULL_UP>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+			};
+
+			conf-crtp {
+				nvidia,pins = "crtp", "gpv", "hdint", "lhs",
+						"lm0", "lpw0", "lpw1", "lpw2",
+						"lsc1", "lsck", "lspi", "lvs",
+						"slxa", "slxd", "spdi";
+				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
+				nvidia,tristate = <TEGRA_PIN_ENABLE>;
+			};
+
+			conf-atb {
+				nvidia,pins = "atb", "atc", "atd", "ate",
+						"cdev1", "cdev2", "csus", "dap1",
+						"dap2", "dap3", "dap4", "ddc",
+						"dta", "dtb", "dte", "gma",
+						"gmd", "gme", "gpu", "gpu7",
+						"irtx", "kbcb", "lm1", "lsc0",
+						"lsdi", "lvp0", "pmc", "sdb",
+						"sdio1", "slxc", "spdo", "spia",
+						"spib", "spic", "uab", "uac",
+						"uda", "ck32", "ddrc", "pmca",
+						"pmcb", "pmcc", "pmcd", "xm2c",
+						"xm2d";
+				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+			};
+
+			conf-dtc {
+				nvidia,pins = "dtc", "dtd";
+				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
+				nvidia,tristate = <TEGRA_PIN_ENABLE>;
+			};
+
+			conf-ld0 {
+				nvidia,pins = "ld0", "ld1", "ld2", "ld3",
+						"ld4", "ld5", "ld6", "ld7",
+						"ld8", "ld9", "ld10", "ld11",
+						"ld12", "ld13", "ld14", "ld15",
+						"ld16", "ld17", "ldi", "lhp0",
+						"lhp1", "lhp2", "lpp", "lvp1",
+						"slxk", "spid";
+				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+			};
+
+			drive-sdio1 {
+				nvidia,pins = "drive_sdio1", "drive_vi1";
+				nvidia,high-speed-mode = <TEGRA_PIN_DISABLE>;
+				nvidia,schmitt = <TEGRA_PIN_ENABLE>;
+				nvidia,low-power-mode = <TEGRA_PIN_LP_DRIVE_DIV_1>;
+				nvidia,pull-down-strength = <31>;
+				nvidia,pull-up-strength = <31>;
+				nvidia,slew-rate-rising = <TEGRA_PIN_SLEW_RATE_SLOWEST>;
+				nvidia,slew-rate-falling = <TEGRA_PIN_SLEW_RATE_SLOWEST>;
+			};
+
+			drive-i2c {
+				nvidia,pins = "drive_dbg", "drive_ddc", "drive_at1",
+						"drive_vi2", "drive_ao1";
+				nvidia,high-speed-mode = <TEGRA_PIN_DISABLE>;
+				nvidia,schmitt = <TEGRA_PIN_ENABLE>;
+				nvidia,low-power-mode = <TEGRA_PIN_LP_DRIVE_DIV_1>;
+				nvidia,pull-down-strength = <31>;
+				nvidia,pull-up-strength = <31>;
+				nvidia,slew-rate-rising = <TEGRA_PIN_SLEW_RATE_FASTEST>;
+				nvidia,slew-rate-falling = <TEGRA_PIN_SLEW_RATE_FASTEST>;
+			};
+
+			drive-dap {
+				nvidia,pins = "drive_dap2", "drive_dap3";
+				nvidia,high-speed-mode = <TEGRA_PIN_DISABLE>;
+				nvidia,schmitt = <TEGRA_PIN_ENABLE>;
+				nvidia,low-power-mode = <TEGRA_PIN_LP_DRIVE_DIV_1>;
+				nvidia,pull-down-strength = <46>;
+				nvidia,pull-up-strength = <46>;
+				nvidia,slew-rate-rising = <TEGRA_PIN_SLEW_RATE_SLOWEST>;
+				nvidia,slew-rate-falling = <TEGRA_PIN_SLEW_RATE_SLOWEST>;
+			};
+		};
+	};
+
+	uartb: serial@70006040 {
+		clocks = <&tegra_car 7>;
+		status = "okay";
+	};
+
+	pwr_i2c: i2c@7000d000 {
+		status = "okay";
+		clock-frequency = <400000>;
+
+		pmic: max8907@3c {
+			compatible = "maxim,max8907";
+			reg = <0x3c>;
+
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			#gpio-cells = <2>;
+			gpio-controller;
+
+			maxim,system-power-controller;
+
+			regulators {
+				vdd_1v8_vio: sd3 {
+					regulator-name = "vcc_1v8_io";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				iovcc_1v8_lcd: ldo3 {
+					regulator-name = "vcc_1v8_lcd";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-boot-on;
+				};
+
+				avdd_3v3_usb: ldo4 {
+					regulator-name = "avdd_3v3_usb";
+					regulator-min-microvolt = <3300000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				vcore_emmc: ldo5 {
+					regulator-name = "vcc_2v8_emmc";
+					regulator-min-microvolt = <2800000>;
+					regulator-max-microvolt = <2800000>;
+					regulator-boot-on;
+				};
+
+				vdd_usd: ldo12 {
+					regulator-name = "vcc_2v8_sdio";
+					regulator-min-microvolt = <2800000>;
+					regulator-max-microvolt = <2800000>;
+					regulator-boot-on;
+				};
+
+				vcc_2v8_lcd: ldo14 {
+					regulator-name = "vcc_2v8_lcd";
+					regulator-min-microvolt = <2800000>;
+					regulator-max-microvolt = <2800000>;
+					regulator-boot-on;
+				};
+			};
+		};
+	};
+
+	dcdc_i2c: i2c-5 {
+		compatible = "i2c-gpio";
+
+		sda-gpios = <&gpio TEGRA_GPIO(Q, 0) GPIO_ACTIVE_HIGH>;
+		scl-gpios = <&gpio TEGRA_GPIO(Q, 1) GPIO_ACTIVE_HIGH>;
+
+		i2c-gpio,delay-us = <5>;
+		i2c-gpio,timeout-ms = <100>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		aat2870: led-controller@60 {
+			compatible = "skyworks,aat2870";
+			reg = <0x60>;
+
+			enable-gpios = <&gpio TEGRA_GPIO(R, 3) GPIO_ACTIVE_HIGH>;
+
+			backlight {
+				current-max-microamp = <27900000>;
+			};
+		};
+	};
+
+	micro_usb: usb@c5000000 {
+		status = "okay";
+		dr_mode = "otg";
+	};
+
+	usb-phy@c5000000 {
+		status = "okay";
+		vbus-supply = <&avdd_3v3_usb>;
+	};
+
+	sdmmc3: sdhci@c8000400 {
+		status = "okay";
+		bus-width = <4>;
+
+		cd-gpios = <&gpio TEGRA_GPIO(I, 5) GPIO_ACTIVE_LOW>;
+
+		vmmc-supply = <&vdd_usd>;
+		vqmmc-supply = <&vdd_1v8_vio>;
+	};
+
+	sdmmc4: sdhci@c8000600 {
+		status = "okay";
+		bus-width = <8>;
+		non-removable;
+
+		vmmc-supply = <&vcore_emmc>;
+		vqmmc-supply = <&vdd_1v8_vio>;
+	};
+
+	/* 32KHz oscillator which is used by PMC */
+	clk32k_in: clock-32k-in {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "ref-oscillator";
+	};
+
+	bridge: cpu-bridge {
+		compatible = "nvidia,tegra-8bit-cpu";
+
+		dc-gpios = <&gpio TEGRA_GPIO(N, 6) GPIO_ACTIVE_HIGH>;
+		rw-gpios = <&gpio TEGRA_GPIO(B, 3) GPIO_ACTIVE_HIGH>;
+		cs-gpios = <&gpio TEGRA_GPIO(N, 4) GPIO_ACTIVE_HIGH>;
+
+		data-gpios = <&gpio TEGRA_GPIO(E, 0) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 1) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 2) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 3) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 4) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 5) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 6) GPIO_ACTIVE_HIGH>,
+			     <&gpio TEGRA_GPIO(E, 7) GPIO_ACTIVE_HIGH>;
+
+		nvidia,init-sequence = <0x0000002c 0x0 0x0 0x00005000>;
+
+		panel {
+			/*
+			 * There are 2 rev of P990. One has Hitachi TX10D07VM0BAA
+			 * panel and other has LG LH400WV3-SD04 panel. We are using
+			 * Hitachi here but it is dynamically adjusted for the
+			 * correct compatible.
+			 */
+			compatible = "hit,tx10d07vm0baa";
+
+			reset-gpios = <&gpio TEGRA_GPIO(V, 7) GPIO_ACTIVE_LOW>;
+
+			avci-supply = <&vcc_2v8_lcd>;
+			iovcc-supply = <&iovcc_1v8_lcd>;
+
+			backlight = <&aat2870>;
+
+			port {
+				panel_input: endpoint {
+					remote-endpoint = <&bridge_output>;
+				};
+			};
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				bridge_input: endpoint {
+					remote-endpoint = <&dpi_output>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				bridge_output: endpoint {
+					remote-endpoint = <&panel_input>;
+				};
+			};
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		key-power {
+			label = "Power";
+			gpios = <&gpio TEGRA_GPIO(V, 2) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_ENTER>;
+		};
+
+		key-volume-up {
+			label = "Volume Up";
+			gpios = <&gpio TEGRA_GPIO(G, 1) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_UP>;
+		};
+
+		key-volume-down {
+			label = "Volume Down";
+			gpios = <&gpio TEGRA_GPIO(G, 0) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_DOWN>;
+		};
+	};
+
+	vdd_3v3_vbat: regulator-vbat {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_vbat";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+};