arch/arm/boot/dts/sun8i-a23-evb.dts

   1 /*
   2  * Copyright 2015 Maxime Ripard
   3  *
   4  * Maxime Ripard <maxime.ripard@free-electrons.com>
   5  *
   6  * This file is dual-licensed: you can use it either under the terms
   7  * of the GPL or the X11 license, at your option. Note that this dual
   8  * licensing only applies to this file, and not this project as a
   9  * whole.
  10  *
  11  *  a) This file is free software; you can redistribute it and/or
  12  *     modify it under the terms of the GNU General Public License as
  13  *     published by the Free Software Foundation; either version 2 of the
  14  *     License, or (at your option) any later version.
  15  *
  16  *     This file is distributed in the hope that it will be useful,
  17  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *     GNU General Public License for more details.
  20  *
  21  * Or, alternatively,
  22  *
  23  *  b) Permission is hereby granted, free of charge, to any person
  24  *     obtaining a copy of this software and associated documentation
  25  *     files (the "Software"), to deal in the Software without
  26  *     restriction, including without limitation the rights to use,
  27  *     copy, modify, merge, publish, distribute, sublicense, and/or
  28  *     sell copies of the Software, and to permit persons to whom the
  29  *     Software is furnished to do so, subject to the following
  30  *     conditions:
  31  *
  32  *     The above copyright notice and this permission notice shall be
  33  *     included in all copies or substantial portions of the Software.
  34  *
  35  *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  36  *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  37  *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  38  *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  39  *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  40  *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  41  *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  42  *     OTHER DEALINGS IN THE SOFTWARE.
  43  */
  44
  45 /dts-v1/;
  46 #include "sun8i-a23.dtsi"
  47 #include "sunxi-common-regulators.dtsi"
  48
  49 #include <dt-bindings/gpio/gpio.h>
  50 #include <dt-bindings/input/input.h>
  51
  52 / {
  53         model = "Allwinner A23 Evaluation Board";
  54         compatible = "allwinner,sun8i-a23-evb", "allwinner,sun8i-a23";
  55
  56         aliases {
  57                 i2c0 = &i2c0;
  58                 i2c1 = &i2c1;
  59                 serial0 = &r_uart;
  60         };
  61
  62         chosen {
  63                 stdout-path = "serial0:115200n8";
  64         };
  65 };
  66
  67 &i2c0 {
  68         pinctrl-names = "default";
  69         pinctrl-0 = <&i2c0_pins_a>;
  70         status = "okay";
  71 };
  72
  73 &i2c1 {
  74         pinctrl-names = "default";
  75         pinctrl-0 = <&i2c1_pins_a>;
  76         status = "okay";
  77 };
  78
  79 &lradc {
  80         vref-supply = <&reg_vcc3v0>;
  81         status = "okay";
  82
  83         button@190 {
  84                 label = "Volume Up";
  85                 linux,code = <KEY_VOLUMEUP>;
  86                 channel = <0>;
  87                 voltage = <190000>;
  88         };
  89
  90         button@390 {
  91                 label = "Volume Down";
  92                 linux,code = <KEY_VOLUMEDOWN>;
  93                 channel = <0>;
  94                 voltage = <390000>;
  95         };
  96
  97         button@600 {
  98                 label = "Home";
  99                 linux,code = <KEY_HOME>;
 100                 channel = <0>;
 101                 voltage = <600000>;
 102         };
 103 };
 104
 105 &mmc0 {
 106         pinctrl-names = "default";
 107         pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_evb>;
 108         vmmc-supply = <&reg_vcc3v0>;
 109         bus-width = <4>;
 110         cd-gpios = <&pio 1 4 GPIO_ACTIVE_LOW>; /* PB4 */
 111         status = "okay";
 112 };
 113
 114 &pio {
 115         mmc0_cd_pin_evb: mmc0_cd_pin@0 {
 116                 pins = "PB4";
 117                 function = "gpio_in";
 118                 bias-pull-up;
 119         };
 120 };
 121
 122 /*
 123  * The RX line has a non-populated resistance. In order to use it, you
 124  * need to solder R207 on the back of the board in order to close the
 125  * line and get a working UART.
 126  */
 127 &r_uart {
 128         pinctrl-names = "default";
 129         pinctrl-0 = <&r_uart_pins_a>;
 130         status = "okay";
 131 };