arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts

   1 // SPDX-License-Identifier: GPL-2.0
   2 /dts-v1/;
   3 #include "bcm2837.dtsi"
   4 #include "bcm2836-rpi.dtsi"
   5 #include "bcm283x-rpi-usb-host.dtsi"
   6 #include "bcm283x-rpi-wifi-bt.dtsi"
   7
   8 / {
   9         compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
  10         model = "Raspberry Pi 3 Model A+";
  11
  12         chosen {
  13                 /* 8250 auxiliary UART instead of pl011 */
  14                 stdout-path = "serial1:115200n8";
  15         };
  16
  17         memory@0 {
  18                 device_type = "memory";
  19                 reg = <0 0x20000000>;
  20         };
  21
  22         leds {
  23                 led-act {
  24                         gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
  25                 };
  26
  27                 led-pwr {
  28                         label = "PWR";
  29                         gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
  30                         default-state = "keep";
  31                         linux,default-trigger = "default-on";
  32                 };
  33         };
  34 };
  35
  36 &firmware {
  37         expgpio: gpio {
  38                 compatible = "raspberrypi,firmware-gpio";
  39                 gpio-controller;
  40                 #gpio-cells = <2>;
  41                 gpio-line-names = "",
  42                                   "BT_WL_ON",
  43                                   "STATUS_LED_R",
  44                                   "",
  45                                   "",
  46                                   "CAM_GPIO0",
  47                                   "CAM_GPIO1",
  48                                   "";
  49                 status = "okay";
  50         };
  51 };
  52
  53 &gpio {
  54         /*
  55          * This is mostly based on the official GPU firmware DT blob.
  56          *
  57          * Legend:
  58          * "FOO" = GPIO line named "FOO" on the schematic
  59          * "FOO_N" = GPIO line named "FOO" on schematic, active low
  60          */
  61         gpio-line-names = "ID_SDA",
  62                           "ID_SCL",
  63                           "SDA1",
  64                           "SCL1",
  65                           "GPIO_GCLK",
  66                           "GPIO5",
  67                           "GPIO6",
  68                           "SPI_CE1_N",
  69                           "SPI_CE0_N",
  70                           "SPI_MISO",
  71                           "SPI_MOSI",
  72                           "SPI_SCLK",
  73                           "GPIO12",
  74                           "GPIO13",
  75                           /* Serial port */
  76                           "TXD1",
  77                           "RXD1",
  78                           "GPIO16",
  79                           "GPIO17",
  80                           "GPIO18",
  81                           "GPIO19",
  82                           "GPIO20",
  83                           "GPIO21",
  84                           "GPIO22",
  85                           "GPIO23",
  86                           "GPIO24",
  87                           "GPIO25",
  88                           "GPIO26",
  89                           "GPIO27",
  90                           "HDMI_HPD_N",
  91                           "STATUS_LED_G",
  92                           /* Used by BT module */
  93                           "CTS0",
  94                           "RTS0",
  95                           "TXD0",
  96                           "RXD0",
  97                           /* Used by Wifi */
  98                           "SD1_CLK",
  99                           "SD1_CMD",
 100                           "SD1_DATA0",
 101                           "SD1_DATA1",
 102                           "SD1_DATA2",
 103                           "SD1_DATA3",
 104                           "PWM0_OUT",
 105                           "PWM1_OUT",
 106                           "", /* GPIO42 */
 107                           "WIFI_CLK",
 108                           "SDA0",
 109                           "SCL0",
 110                           "SMPS_SCL",
 111                           "SMPS_SDA",
 112                           /* Used by SD Card */
 113                           "SD_CLK_R",
 114                           "SD_CMD_R",
 115                           "SD_DATA0_R",
 116                           "SD_DATA1_R",
 117                           "SD_DATA2_R",
 118                           "SD_DATA3_R";
 119 };
 120
 121 &hdmi {
 122         hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
 123         power-domains = <&power RPI_POWER_DOMAIN_HDMI>;
 124         status = "okay";
 125 };
 126
 127 &pwm {
 128         pinctrl-names = "default";
 129         pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
 130         status = "okay";
 131 };
 132
 133 /* SDHOST is used to drive the SD card */
 134 &sdhost {
 135         pinctrl-names = "default";
 136         pinctrl-0 = <&sdhost_gpio48>;
 137         status = "okay";
 138         bus-width = <4>;
 139 };
 140
 141 /* uart0 communicates with the BT module
 142  *
 143  * WL_REG_ON and BT_REG_ON of the CYW43455 Wifi/BT module are driven
 144  * by a single GPIO. We can't give GPIO control to one of the drivers,
 145  * otherwise the other part would get unexpectedly disturbed.
 146  */
 147 &uart0 {
 148         pinctrl-names = "default";
 149         pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
 150 };
 151
 152 /* uart1 is mapped to the pin header */
 153 &uart1 {
 154         pinctrl-names = "default";
 155         pinctrl-0 = <&uart1_gpio14>;
 156         status = "okay";
 157 };