ARM: tegra: Add device-tree for ASUS Google Nexus 7

There are few hardware variants of NVIDIA Tegra30-based Nexus 7 device:

1. WiFi-only (named Grouper)
2. GSM (named Tilapia)
3. Using Maxim PMIC (E1565 board ID)
4. Using Ti PMIC (PM269 board ID)

This patch adds device-trees for known and tested variants.

Link: https://wiki.postmarketos.org/wiki/Google_Nexus_7_2012_(asus-grouper)
Tested-by: Pedro Ângelo <pangelo@void.io>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Tested-by: Zack Pearsall <zpearsall@yahoo.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 185 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi
new file mode 100644
index 000000000000..b25b3fa90ac6
--- /dev/null
+++ b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/mfd/max77620.h>
+
+/ {
+	i2c@7000d000 {
+		pmic: pmic@3c {
+			compatible = "maxim,max77663";
+			reg = <0x3c>;
+
+			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+
+			#gpio-cells = <2>;
+			gpio-controller;
+
+			system-power-controller;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&max77620_default>;
+
+			max77620_default: pinmux {
+				gpio4 {
+					pins = "gpio4";
+					function = "32k-out1";
+				};
+			};
+
+			cpu-pwr-req {
+				gpio-hog;
+				gpios = <6 GPIO_ACTIVE_HIGH>;
+				input;
+			};
+
+			fps {
+				fps0 {
+					maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_EN0>;
+				};
+
+				fps1 {
+					maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_EN1>;
+				};
+
+				fps2 {
+					maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_EN0>;
+				};
+			};
+
+			regulators {
+				in-sd0-supply = <&vdd_5v0_sys>;
+				in-sd1-supply = <&vdd_5v0_sys>;
+				in-sd2-supply = <&vdd_5v0_sys>;
+				in-sd3-supply = <&vdd_5v0_sys>;
+				in-sd4-supply = <&vdd_5v0_sys>;
+
+				in-ldo0-1-supply = <&vdd_1v35>;
+				in-ldo2-supply   = <&vdd_3v3_sys>;
+				in-ldo3-5-supply = <&vdd_3v3_sys>;
+				in-ldo4-6-supply = <&vdd_5v0_sys>;
+				in-ldo7-8-supply = <&vdd_1v35>;
+
+				vdd_cpu: sd0 {
+					regulator-name = "vdd_cpu";
+					regulator-min-microvolt = <800000>;
+					regulator-max-microvolt = <1250000>;
+					regulator-coupled-with = <&vdd_core>;
+					regulator-coupled-max-spread = <300000>;
+					regulator-max-step-microvolt = <100000>;
+					regulator-always-on;
+					regulator-boot-on;
+
+					nvidia,tegra-cpu-regulator;
+				};
+
+				vdd_core: sd1 {
+					regulator-name = "vdd_core";
+					regulator-min-microvolt = <950000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-coupled-with = <&vdd_cpu>;
+					regulator-coupled-max-spread = <300000>;
+					regulator-max-step-microvolt = <100000>;
+					regulator-always-on;
+					regulator-boot-on;
+
+					nvidia,tegra-core-regulator;
+				};
+
+				vdd_1v8: sd2 {
+					regulator-name = "vdd_gen1v8";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				vdd_1v35: sd3 {
+					regulator-name = "vdd_ddr3l_1v35";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1350000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				ldo0 {
+					regulator-name = "vdd_ddr_hs";
+					regulator-min-microvolt = <1000000>;
+					regulator-max-microvolt = <1000000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				ldo2 {
+					regulator-name = "vdd_ddr_rx";
+					regulator-min-microvolt = <2800000>;
+					regulator-max-microvolt = <2800000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				vcore_emmc: ldo3 {
+					regulator-name = "vcore_emmc";
+					regulator-min-microvolt = <2850000>;
+					regulator-max-microvolt = <3100000>;
+					regulator-always-on;
+				};
+
+				ldo4 {
+					regulator-name = "vdd_rtc";
+					regulator-min-microvolt = <1200000>;
+					regulator-max-microvolt = <1200000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				ldo5 {
+					regulator-name = "vdd_camera";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <1800000>;
+				};
+
+				ldo6 {
+					regulator-name = "vddio_sdmmc";
+					regulator-min-microvolt = <1800000>;
+					regulator-max-microvolt = <3300000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+
+				ldo7 {
+					regulator-name = "avdd_dsi_csi";
+					regulator-min-microvolt = <1200000>;
+					regulator-max-microvolt = <1200000>;
+				};
+
+				ldo8 {
+					regulator-name = "avdd_pll";
+					regulator-min-microvolt = <1200000>;
+					regulator-max-microvolt = <1200000>;
+					regulator-always-on;
+					regulator-boot-on;
+				};
+			};
+		};
+	};
+
+	vdd_3v3_sys: regulator@1 {
+		gpio = <&pmic 3 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	regulator@4 {
+		compatible = "regulator-fixed";
+		regulator-name = "avdd_usb";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		regulator-boot-on;
+		gpio = <&pmic 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&vdd_3v3_sys>;
+	};
+};