board: asus: grouper: add Google Nexus 7 (2012) support

Nexus 7 is a mini tablet computer co-developed by Google and Asus
that runs the Android operating system. The Nexus 7 features a 7"
display, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM and 8/16 GB
of internal storage.

This patch brings support for all 3 known ASUS/Google devices:
- Nexus 7 (2012) E1565
- Nexus 7 (2012) PM269
- Nexus 7 (2012) 3G - tilapia

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS Grouper E1565
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # ASUS Grouper E1565
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

6 files changed, 306 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index c87729d45e..f2b4044a01 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -237,6 +237,9 @@ dtb-$(CONFIG_ARCH_TEGRA) += tegra20-harmony.dtb \
 	tegra20-ventana.dtb \
 	tegra20-colibri.dtb \
 	tegra30-apalis.dtb \
+	tegra30-asus-nexus7-grouper-PM269.dtb \
+	tegra30-asus-nexus7-grouper-E1565.dtb \
+	tegra30-asus-nexus7-tilapia-E1565.dtb \
 	tegra30-asus-p1801-t.dtb \
 	tegra30-asus-tf201.dtb \
 	tegra30-asus-tf300t.dtb \
diff --git a/arch/arm/dts/tegra30-asus-grouper-common.dtsi b/arch/arm/dts/tegra30-asus-grouper-common.dtsi
new file mode 100644
index 0000000000..4fa980f24f
--- /dev/null
+++ b/arch/arm/dts/tegra30-asus-grouper-common.dtsi
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/input/input.h>
+
+#include "tegra30.dtsi"
+
+/ {
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		i2c0 = &pwr_i2c;
+
+		mmc0 = &sdmmc4;	/* eMMC */
+
+		rtc0 = &pmic;
+		rtc1 = "/rtc@7000e000";
+
+		usb0 = &usb1;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x40000000>;
+	};
+
+	host1x@50000000 {
+		dc@54200000 {
+			nvidia,180-rotation;
+			rgb {
+				status = "okay";
+
+				nvidia,panel = <&panel>;
+			};
+		};
+	};
+
+	gpio@6000d000 {
+		volume-buttons-hog {
+			gpio-hog;
+			gpios = <TEGRA_GPIO(R, 0) GPIO_ACTIVE_HIGH>,
+				<TEGRA_GPIO(Q, 0) GPIO_ACTIVE_HIGH>;
+			output-low;
+		};
+	};
+
+	uarta: serial@70006000 {
+		status = "okay";
+	};
+
+	pwm: pwm@7000a000 {
+		status = "okay";
+	};
+
+	pwr_i2c: i2c@7000d000 {
+		status = "okay";
+		clock-frequency = <400000>;
+	};
+
+	sdmmc4: sdhci@78000600 {
+		status = "okay";
+		bus-width = <8>;
+		non-removable;
+	};
+
+	usb1: usb@7d000000 {
+		status = "okay";
+		dr_mode = "otg";
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+
+		enable-gpios = <&gpio TEGRA_GPIO(H, 2) GPIO_ACTIVE_HIGH>;
+		power-supply = <&vdd_5v0_bl>;
+		pwms = <&pwm 0 50000>;
+
+		brightness-levels = <1 35 70 105 140 175 210 255>;
+		default-brightness-level = <5>;
+	};
+
+	/* PMIC has a built-in 32KHz oscillator which is used by PMC */
+	clk32k_in: clock-32k {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "pmic-oscillator";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		key-power {
+			label = "Power";
+			gpios = <&gpio TEGRA_GPIO(V, 0) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_ENTER>;
+		};
+
+		key-volume-up {
+			label = "Volume Up";
+			gpios = <&gpio TEGRA_GPIO(Q, 2) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_UP>;
+		};
+
+		key-volume-down {
+			label = "Volume Down";
+			gpios = <&gpio TEGRA_GPIO(Q, 3) GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_DOWN>;
+		};
+	};
+
+	panel: panel {
+		compatible = "simple-panel";
+
+		power-supply = <&vdd_pnl_reg>;
+		enable-gpios = <&gpio TEGRA_GPIO(N, 6) GPIO_ACTIVE_HIGH>;
+
+		backlight = <&backlight>;
+
+		display-timings {
+			timing@0 {
+				/* 1280x800@60Hz */
+				clock-frequency = <68000000>;
+
+				hactive = <800>;
+				hfront-porch = <24>;
+				hback-porch = <32>;
+				hsync-len = <24>;
+
+				vactive = <1280>;
+				vfront-porch = <5>;
+				vback-porch = <32>;
+				vsync-len = <1>;
+			};
+		};
+	};
+
+	vdd_pnl_reg: regulator-pnl {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_panel";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio TEGRA_GPIO(W, 1) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	vdd_5v0_bl: regulator-bl {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_5v0_bl";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		gpio = <&gpio TEGRA_GPIO(H, 3) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+};
diff --git a/arch/arm/dts/tegra30-asus-nexus7-grouper-E1565.dts b/arch/arm/dts/tegra30-asus-nexus7-grouper-E1565.dts
new file mode 100644
index 0000000000..a98d3e2145
--- /dev/null
+++ b/arch/arm/dts/tegra30-asus-nexus7-grouper-E1565.dts
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "tegra30-asus-grouper-common.dtsi"
+
+/ {
+	model = "ASUS Google Nexus 7 (Project Nakasi / ME370T) E1565";
+	compatible = "asus,grouper", "nvidia,tegra30";
+
+	i2c@7000d000 {
+		pmic: max77663@3c {
+			compatible = "maxim,max77663";
+			reg = <0x3c>;
+
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			system-power-controller;
+
+			#gpio-cells = <2>;
+			gpio-controller;
+
+			regulators {
+				vdd_1v8: sd2 {
+					regulator-name = "vdd_1v8_gen";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				/* eMMC VDD */
+				vcore_emmc: ldo3 {
+					regulator-name = "vcore_emmc";
+					regulator-min-microvolt = <2850000>;
+					regulator-max-microvolt = <3100000>;
+					regulator-always-on;
+				};
+			};
+		};
+	};
+};
diff --git a/arch/arm/dts/tegra30-asus-nexus7-grouper-PM269.dts b/arch/arm/dts/tegra30-asus-nexus7-grouper-PM269.dts
new file mode 100644
index 0000000000..44ea218a47
--- /dev/null
+++ b/arch/arm/dts/tegra30-asus-nexus7-grouper-PM269.dts
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "tegra30-asus-grouper-common.dtsi"
+
+/ {
+	model = "ASUS Google Nexus 7 (Project Nakasi / ME370T) PM269";
+	compatible = "asus,grouper", "nvidia,tegra30";
+
+	i2c@7000d000 {
+		/* Texas Instruments TPS659110 PMIC */
+		pmic: tps65911@2d {
+			compatible = "ti,tps65911";
+			reg = <0x2d>;
+
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			ti,system-power-controller;
+
+			#gpio-cells = <2>;
+			gpio-controller;
+
+			regulators {
+				/* eMMC VDD */
+				vcore_emmc: ldo1 {
+					regulator-name = "vdd_emmc_core";
+					regulator-min-microvolt = <1000000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+				};
+			};
+		};
+	};
+};
diff --git a/arch/arm/dts/tegra30-asus-nexus7-tilapia-E1565.dts b/arch/arm/dts/tegra30-asus-nexus7-tilapia-E1565.dts
new file mode 100644
index 0000000000..812d5a1ba7
--- /dev/null
+++ b/arch/arm/dts/tegra30-asus-nexus7-tilapia-E1565.dts
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "tegra30-asus-grouper-common.dtsi"
+
+/ {
+	model = "ASUS Google Nexus 7 (Project Bach / ME370TG) E1565";
+	compatible = "asus,tilapia", "nvidia,tegra30";
+
+	i2c@7000d000 {
+		pmic: max77663@3c {
+			compatible = "maxim,max77663";
+			reg = <0x3c>;
+
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			system-power-controller;
+
+			#gpio-cells = <2>;
+			gpio-controller;
+
+			regulators {
+				vdd_1v8: sd2 {
+					regulator-name = "vdd_1v8_gen";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				/* eMMC VDD */
+				vcore_emmc: ldo3 {
+					regulator-name = "vcore_emmc";
+					regulator-min-microvolt = <2850000>;
+					regulator-max-microvolt = <3100000>;
+					regulator-always-on;
+				};
+			};
+		};
+	};
+
+	panel {
+		display-timings {
+			timing@0 {
+				/* 1280x800@60Hz */
+				clock-frequency = <81750000>;
+
+				hactive = <800>;
+				hfront-porch = <64>;
+				hback-porch = <128>;
+				hsync-len = <64>;
+
+				vactive = <1280>;
+				vfront-porch = <5>;
+				vback-porch = <2>;
+				vsync-len = <1>;
+			};
+		};
+	};
+};
diff --git a/arch/arm/mach-tegra/tegra30/Kconfig b/arch/arm/mach-tegra/tegra30/Kconfig
index 4f78d0ba97..6cbb73ebee 100644
--- a/arch/arm/mach-tegra/tegra30/Kconfig
+++ b/arch/arm/mach-tegra/tegra30/Kconfig
@@ -20,6 +20,10 @@ config TARGET_COLIBRI_T30
 	bool "Toradex Colibri T30 board"
 	select BOARD_LATE_INIT
 
+config TARGET_GROUPER
+	bool "Asus and Google Grouper board"
+	select BOARD_LATE_INIT
+
 config TARGET_TEC_NG
 	bool "Avionic Design TEC-NG board"
 	select BOARD_LATE_INIT
@@ -37,6 +41,7 @@ source "board/toradex/apalis_t30/Kconfig"
 source "board/nvidia/beaver/Kconfig"
 source "board/nvidia/cardhu/Kconfig"
 source "board/toradex/colibri_t30/Kconfig"
+source "board/asus/grouper/Kconfig"
 source "board/avionic-design/tec-ng/Kconfig"
 source "board/asus/transformer-t30/Kconfig"