[PATCH v2 5/5] arm64: dts: allwinner: a64: add support for PineTab

Icenowy Zheng icenowy at aosc.io
Thu Jan 16 03:36:36 UTC 2020 

PineTab is a 10.1" tablet by Pine64 with Allwinner A64 inside.

It includes the following peripherals:

USB:
- A microUSB Type-B port connected to the OTG-capable USB PHY of
Allwinner A64. The ID pin is connected to a GPIO of the A64 SoC, and the
Vbus is connected to the Vbus of AXP803 PMIC. These enables OTG
functionality on this port.
- A USB Type-A port is connected to the internal hub attached to the
non-OTG USB PHY of Allwinner A64.
- There are reserved pins for an external keyboard connected to the
internal hub.

Power:
- The microUSB port has its Vbus connected to AXP803, mentioned above.
- A DC jack (of a strange size, 2.5mm outer diameter) is connected to
the ACIN of AXP803.
- A Li-Polymer battery is connected to the battery pins of AXP803.

Storage:
- An tradition Pine64 eMMC slot is on the board, mounted with an eMMC
module by factory.
- An external microSD slot is hidden under a protect case.

Display:
- A MIPI-DSI LCD panel (800x1280) is connected to the DSI port of A64 SoC.
- A mini HDMI port.

Input:
- A touch panel attached to a Goodix GT9271 touch controller.
- Volume keys connected to the LRADC of the A64 SoC.

Camera:
- An OV5640 CMOS camera is at rear, connected to the CSI bus of A64 SoC.
- A GC2145 CMOS camera is at front, shares the same CSI bus with OV5640.

Audio:
- A headphone jack is conencted to the SoC's internal codec.
- A speaker connected is to the Line Out port of SoC's internal codec, via
an amplifier.

Misc:
- Debug UART is muxed with the headphone jack, with the switch next to
the microSD slot.
- A bosch BMA223 accelerometer is connected to the I2C bus of A64 SoC.
- Wi-Fi and Bluetooth are available via a RTL8723CS chip, similar to the
one in Pinebook.

This commit adds a basically usable device tree for it, implementing
most of the features mentioned above. HDMI is not supported now because
bad LCD-HDMI coexistence situation of mainline A64 display driver, the
front camera currently lacks a driver and a facility to share the bus
with the rear one, and the accelerometer currently lacks a DT binding.

Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
---
Changes in v2:
- Remove I2C pinmuxes.
- Dropped binding-less accelerometer.
- Used exponent curve for backlight.

 arch/arm64/boot/dts/allwinner/Makefile        |   1 +
 .../boot/dts/allwinner/sun50i-a64-pinetab.dts | 460 ++++++++++++++++++
 2 files changed, 461 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts

diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
index cf4f78617c3f..6dad63881cd3 100644
--- a/arch/arm64/boot/dts/allwinner/Makefile
+++ b/arch/arm64/boot/dts/allwinner/Makefile
@@ -9,6 +9,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-orangepi-win.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-lts.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-plus.dtb sun50i-a64-pine64.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinebook.dtb
+dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinetab.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-teres-i.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus.dtb
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
new file mode 100644
index 000000000000..c76c94855f43
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
@@ -0,0 +1,460 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2019 Icenowy Zheng <icenowy at aosc.xyz>
+ *
+ */
+
+/dts-v1/;
+
+#include "sun50i-a64.dtsi"
+#include "sun50i-a64-cpu-opp.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/pwm/pwm.h>
+
+/ {
+	model = "PineTab";
+	compatible = "pine64,pinetab", "allwinner,sun50i-a64";
+
+	aliases {
+		serial0 = &uart0;
+		ethernet0 = &rtl8723cs;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+		brightness-levels = <0 16 18 20 22 24 26 29 32 35 38 42 46 51 56 62 68 75 83 91 100>;
+		default-brightness-level = <15>;
+		enable-gpios = <&pio 3 23 GPIO_ACTIVE_HIGH>; /* PD23 */
+		power-supply = <&vdd_bl>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	i2c-csi {
+		compatible = "i2c-gpio";
+		sda-gpios = <&pio 4 13 GPIO_ACTIVE_HIGH>; /* PE13 */
+		scl-gpios = <&pio 4 12 GPIO_ACTIVE_HIGH>; /* PE12 */
+		i2c-gpio,delay-us = <5>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/* Rear camera */
+		ov5640: camera at 3c {
+			compatible = "ovti,ov5640";
+			reg = <0x3c>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&csi_mclk_pin>;
+			clocks = <&ccu CLK_CSI_MCLK>;
+			clock-names = "xclk";
+
+			AVDD-supply = <&reg_dldo3>;
+			DOVDD-supply = <&reg_aldo1>;
+			DVDD-supply = <&reg_eldo3>;
+			reset-gpios = <&pio 4 14 GPIO_ACTIVE_LOW>; /* PE14 */
+			powerdown-gpios = <&pio 4 15 GPIO_ACTIVE_HIGH>; /* PE15 */
+
+			port {
+				ov5640_ep: endpoint {
+					remote-endpoint = <&csi_ep>;
+					bus-width = <8>;
+					hsync-active = <1>; /* Active high */
+					vsync-active = <0>; /* Active low */
+					data-active = <1>;  /* Active high */
+					pclk-sample = <1>;  /* Rising */
+				};
+			};
+		};
+	};
+
+	speaker_amp: audio-amplifier {
+		compatible = "simple-audio-amplifier";
+		enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+		sound-name-prefix = "Speaker Amp";
+	};
+
+	vdd_bl: regulator at 0 {
+		compatible = "regulator-fixed";
+		regulator-name = "bl-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
+		enable-active-high;
+	};
+
+	wifi_pwrseq: wifi_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
+		post-power-on-delay-ms = <200>;
+	};
+};
+
+&codec {
+	status = "okay";
+};
+
+&codec_analog {
+	hpvcc-supply = <&reg_eldo1>;
+	status = "okay";
+};
+
+&cpu0 {
+	cpu-supply = <&reg_dcdc2>;
+};
+
+&cpu1 {
+	cpu-supply = <&reg_dcdc2>;
+};
+
+&cpu2 {
+	cpu-supply = <&reg_dcdc2>;
+};
+
+&cpu3 {
+	cpu-supply = <&reg_dcdc2>;
+};
+
+&csi {
+	status = "okay";
+
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		csi_ep: endpoint {
+			remote-endpoint = <&ov5640_ep>;
+			bus-width = <8>;
+			hsync-active = <1>; /* Active high */
+			vsync-active = <0>; /* Active low */
+			data-active = <1>;  /* Active high */
+			pclk-sample = <1>;  /* Rising */
+		};
+	};
+};
+
+&dai {
+	status = "okay";
+};
+
+&de {
+	status = "okay";
+};
+
+&dphy {
+	status = "okay";
+};
+
+&dsi {
+	vcc-dsi-supply = <&reg_dldo1>;
+	status = "okay";
+
+	panel at 0 {
+		compatible = "feixin,k101-im2ba02";
+		reg = <0>;
+		avdd-supply = <&reg_dc1sw>;
+		dvdd-supply = <&reg_dc1sw>;
+		cvdd-supply = <&reg_ldo_io1>;
+		reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
+		backlight = <&backlight>;
+	};
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+
+	touchscreen at 5d {
+		compatible = "goodix,gt9271";
+		reg = <0x5d>;
+		interrupt-parent = <&pio>;
+		interrupts = <7 4 IRQ_TYPE_LEVEL_HIGH>; /* PH4 */
+		irq-gpios = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
+		reset-gpios = <&pio 7 8 GPIO_ACTIVE_HIGH>; /* PH8 */
+		AVDD28-supply = <&reg_ldo_io1>;
+	};
+};
+
+&i2c0_pins {
+	bias-pull-up;
+};
+
+&i2c1 {
+	status = "okay";
+
+	/* TODO: add Bochs BMA223 accelerometer here */
+};
+
+&lradc {
+	vref-supply = <&reg_aldo3>;
+	status = "okay";
+
+	button-200 {
+		label = "Volume Up";
+		linux,code = <KEY_VOLUMEUP>;
+		channel = <0>;
+		voltage = <200000>;
+	};
+
+	button-400 {
+		label = "Volume Down";
+		linux,code = <KEY_VOLUMEDOWN>;
+		channel = <0>;
+		voltage = <400000>;
+	};
+};
+
+&mixer1 {
+	status = "okay";
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins>;
+	vmmc-supply = <&reg_dcdc1>;
+	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;
+	disable-wp;
+	bus-width = <4>;
+	status = "okay";
+};
+
+&mmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins>;
+	vmmc-supply = <&reg_dldo4>;
+	vqmmc-supply = <&reg_eldo1>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+
+	rtl8723cs: wifi at 1 {
+		reg = <1>;
+	};
+};
+
+&mmc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc2_pins>;
+	vmmc-supply = <&reg_dcdc1>;
+	vqmmc-supply = <&reg_dcdc1>;
+	bus-width = <8>;
+	non-removable;
+	cap-mmc-hw-reset;
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&pwm {
+	status = "okay";
+};
+
+&r_rsb {
+	status = "okay";
+
+	axp803: pmic at 3a3 {
+		compatible = "x-powers,axp803";
+		reg = <0x3a3>;
+		interrupt-parent = <&r_intc>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+		x-powers,drive-vbus-en;
+	};
+};
+
+#include "axp803.dtsi"
+
+&ac_power_supply {
+	status = "okay";
+};
+
+&battery_power_supply {
+	status = "okay";
+};
+
+&reg_aldo1 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "dovdd-csi";
+};
+
+&reg_aldo2 {
+	regulator-always-on;
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-pl";
+};
+
+&reg_aldo3 {
+	regulator-always-on;
+	regulator-min-microvolt = <2700000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-pll-avcc";
+};
+
+&reg_dc1sw {
+	regulator-name = "vcc-lcd";
+};
+
+&reg_dcdc1 {
+	regulator-always-on;
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-3v3";
+};
+
+&reg_dcdc2 {
+	regulator-always-on;
+	regulator-min-microvolt = <1000000>;
+	regulator-max-microvolt = <1300000>;
+	regulator-name = "vdd-cpux";
+};
+
+/* DCDC3 is polyphased with DCDC2 */
+
+&reg_dcdc5 {
+	regulator-always-on;
+	regulator-min-microvolt = <1200000>;
+	regulator-max-microvolt = <1200000>;
+	regulator-name = "vcc-dram";
+};
+
+&reg_dcdc6 {
+	regulator-always-on;
+	regulator-min-microvolt = <1100000>;
+	regulator-max-microvolt = <1100000>;
+	regulator-name = "vdd-sys";
+};
+
+&reg_dldo1 {
+	regulator-always-on;
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-hdmi-dsi-sensor";
+};
+
+&reg_dldo3 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "avdd-csi";
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-wifi";
+};
+
+&reg_drivevbus {
+	regulator-name = "usb0-vbus";
+	status = "okay";
+};
+
+&reg_eldo1 {
+	regulator-always-on;
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <1800000>;
+	regulator-name = "cpvdd";
+};
+
+&reg_eldo2 {
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <1800000>;
+	regulator-name = "vcca-1v8";
+};
+
+&reg_eldo3 {
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <1800000>;
+	regulator-name = "dvdd-1v8-csi";
+};
+
+&reg_fldo1 {
+	regulator-min-microvolt = <1200000>;
+	regulator-max-microvolt = <1200000>;
+	regulator-name = "vcc-1v2-hsic";
+};
+
+&reg_fldo2 {
+	regulator-always-on;
+	regulator-min-microvolt = <1100000>;
+	regulator-max-microvolt = <1100000>;
+	regulator-name = "vdd-cpus";
+};
+
+&reg_ldo_io0 {
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-name = "vcc-usb";
+	status = "okay";
+};
+
+&reg_ldo_io1 {
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-enable-ramp-delay = <3500000>;
+	regulator-name = "vcc-touchscreen";
+	status = "okay";
+};
+
+&reg_rtc_ldo {
+	regulator-name = "vcc-rtc";
+};
+
+&sound {
+	status = "okay";
+	simple-audio-card,aux-devs = <&codec_analog>, <&speaker_amp>;
+	simple-audio-card,widgets = "Microphone", "Internal Microphone Left",
+				    "Microphone", "Internal Microphone Right",
+				    "Headphone", "Headphone Jack",
+				    "Speaker", "Internal Speaker";
+	simple-audio-card,routing =
+			"Left DAC", "AIF1 Slot 0 Left",
+			"Right DAC", "AIF1 Slot 0 Right",
+			"Speaker Amp INL", "LINEOUT",
+			"Speaker Amp INR", "LINEOUT",
+			"Internal Speaker", "Speaker Amp OUTL",
+			"Internal Speaker", "Speaker Amp OUTR",
+			"Headphone Jack", "HP",
+			"AIF1 Slot 0 Left ADC", "Left ADC",
+			"AIF1 Slot 0 Right ADC", "Right ADC",
+			"Internal Microphone Left", "MBIAS",
+			"MIC1", "Internal Microphone Left",
+			"Internal Microphone Right", "HBIAS",
+			"MIC2", "Internal Microphone Right";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pb_pins>;
+	status = "okay";
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usb_power_supply {
+	status = "okay";
+};
+
+&usbphy {
+	usb0_id_det-gpios = <&pio 7 9 GPIO_ACTIVE_HIGH>; /* PH9 */
+	usb0_vbus_power-supply = <&usb_power_supply>;
+	usb0_vbus-supply = <&reg_drivevbus>;
+	usb1_vbus-supply = <&reg_ldo_io0>;
+	status = "okay";
+};
-- 
2.23.0

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