TOMOYO Linux Cross Reference
Linux/arch/arm/boot/dts/allwinner/sun8i-reference-design-tablet.dtsi

   /*
    * Copyright 2015 Hans de Goede <hdegoede@redhat.com>
    *
    * This file is dual-licensed: you can use it either under the terms
    * of the GPL or the X11 license, at your option. Note that this dual
    * licensing only applies to this file, and not this project as a
    * whole.
    *
    *  a) This file is free software; you can redistribute it and/or
   *     modify it under the terms of the GNU General Public License as
   *     published by the Free Software Foundation; either version 2 of the
   *     License, or (at your option) any later version.
   *
   *     This file is distributed in the hope that it will be useful,
   *     but WITHOUT ANY WARRANTY; without even the implied warranty of
   *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *     GNU General Public License for more details.
   *
   * Or, alternatively,
   *
   *  b) Permission is hereby granted, free of charge, to any person
   *     obtaining a copy of this software and associated documentation
   *     files (the "Software"), to deal in the Software without
   *     restriction, including without limitation the rights to use,
   *     copy, modify, merge, publish, distribute, sublicense, and/or
   *     sell copies of the Software, and to permit persons to whom the
   *     Software is furnished to do so, subject to the following
   *     conditions:
   *
   *     The above copyright notice and this permission notice shall be
   *     included in all copies or substantial portions of the Software.
   *
   *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
   *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   *     OTHER DEALINGS IN THE SOFTWARE.
   */
  #include "sunxi-reference-design-tablet.dtsi"
  
  #include <dt-bindings/pwm/pwm.h>
  
  / {
          aliases {
                  serial0 = &r_uart;
          };
  
          backlight: backlight {
                  compatible = "pwm-backlight";
                  pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
                  brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
                  default-brightness-level = <8>;
                  enable-gpios = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
                  power-supply = <&reg_dc1sw>;
          };
  
          chosen {
                  stdout-path = "serial0:115200n8";
          };
  };
  
  &i2c0 {
          /*
           * The gsl1680 is rated at 400KHz and it will not work reliable at
           * 100KHz, this has been confirmed on multiple different q8 tablets.
           * The gsl1680 is the only device on this bus.
           */
          clock-frequency = <400000>;
  
          touchscreen: touchscreen@40 {
                  reg = <0x40>;
                  interrupt-parent = <&pio>;
                  interrupts = <1 5 IRQ_TYPE_EDGE_FALLING>; /* PB5 */
                  power-gpios = <&pio 7 1 GPIO_ACTIVE_HIGH>; /* PH1 */
                  /* Tablet dts must provide reg and compatible */
                  status = "disabled";
          };
  };
  
  &mmc0 {
          vmmc-supply = <&reg_dcdc1>;
          bus-width = <4>;
          cd-gpios = <&pio 1 4 GPIO_ACTIVE_LOW>; /* PB4 */
          status = "okay";
  };
  
  &r_rsb {
          status = "okay";
  
          axp22x: pmic@3a3 {
                  compatible = "x-powers,axp223";
                  reg = <0x3a3>;
                  interrupt-parent = <&r_intc>;
                  interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
                  eldoin-supply = <&reg_dcdc1>;
                  drivevbus-supply = <&reg_vcc5v0>;
                 x-powers,drive-vbus-en;
         };
 };
 
 #include "axp223.dtsi"
 
 &ac_power_supply {
         status = "okay";
 };
 
 &battery_power_supply {
         status = "okay";
 };
 
 &reg_aldo1 {
         regulator-always-on;
         regulator-min-microvolt = <3000000>;
         regulator-max-microvolt = <3000000>;
         regulator-name = "vcc-io";
 };
 
 &reg_aldo2 {
         regulator-always-on;
         regulator-min-microvolt = <2350000>;
         regulator-max-microvolt = <2650000>;
         regulator-name = "vdd-dll";
 };
 
 &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_dc5ldo {
         regulator-always-on;
         regulator-min-microvolt = <900000>;
         regulator-max-microvolt = <1400000>;
         regulator-name = "vdd-cpus";
 };
 
 &reg_dcdc1 {
         regulator-always-on;
         regulator-min-microvolt = <3000000>;
         regulator-max-microvolt = <3000000>;
         regulator-name = "vcc-3v0";
 };
 
 &reg_dcdc2 {
         regulator-always-on;
         regulator-min-microvolt = <900000>;
         regulator-max-microvolt = <1400000>;
         regulator-name = "vdd-sys";
 };
 
 &reg_dcdc3 {
         regulator-always-on;
         regulator-min-microvolt = <900000>;
         regulator-max-microvolt = <1400000>;
         regulator-name = "vdd-cpu";
 };
 
 &reg_dcdc5 {
         regulator-always-on;
         regulator-min-microvolt = <1500000>;
         regulator-max-microvolt = <1500000>;
         regulator-name = "vcc-dram";
 };
 
 &reg_dldo1 {
         regulator-min-microvolt = <3300000>;
         regulator-max-microvolt = <3300000>;
         regulator-name = "vcc-wifi";
 };
 
 &reg_drivevbus {
         regulator-name = "usb0-vbus";
         status = "okay";
 };
 
 &reg_ldo_io1 {
         regulator-min-microvolt = <3300000>;
         regulator-max-microvolt = <3300000>;
         regulator-name = "vcc-touchscreen";
         status = "okay";
 };
 
 &reg_rtc_ldo {
         regulator-name = "vcc-rtc";
 };
 
 &cpu0 {
         cpu-supply = <&reg_dcdc2>;
 };
 
 &r_uart {
         pinctrl-names = "default";
         pinctrl-0 = <&r_uart_pins_a>;
         status = "okay";
 };
 
 &simplefb_lcd {
         vcc-lcd-supply = <&reg_dc1sw>;
 };
 
 &usb_otg {
         dr_mode = "otg";
         status = "okay";
 };
 
 &usb_power_supply {
         status = "okay";
 };
 
 &usbphy {
         usb0_id_det-gpios = <&pio 7 8 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PH8 */
         usb0_vbus_power-supply = <&usb_power_supply>;
         usb0_vbus-supply = <&reg_drivevbus>;
         status = "okay";
 };

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