src/arm/broadcom/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-led-deprecated.dtsi"
   6 #include "bcm283x-rpi-usb-host.dtsi"
   7 #include "bcm283x-rpi-wifi-bt.dtsi"
   8
   9 / {
  10         compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
  11         model = "Raspberry Pi 3 Model A+";
  12
  13         chosen {
  14                 /* 8250 auxiliary UART instead of pl011 */
  15                 stdout-path = "serial1:115200n8";
  16         };
  17
  18         memory@0 {
  19                 device_type = "memory";
  20                 reg = <0 0x20000000>;
  21         };
  22 };
  23
  24 &firmware {
  25         expgpio: gpio {
  26                 compatible = "raspberrypi,firmware-gpio";
  27                 gpio-controller;
  28                 #gpio-cells = <2>;
  29                 gpio-line-names = "",
  30                                   "BT_WL_ON",
  31                                   "STATUS_LED_R",
  32                                   "",
  33                                   "",
  34                                   "CAM_GPIO0",
  35                                   "CAM_GPIO1",
  36                                   "";
  37                 status = "okay";
  38         };
  39 };
  40
  41 &gpio {
  42         /*
  43          * This is mostly based on the official GPU firmware DT blob.
  44          *
  45          * Legend:
  46          * "FOO" = GPIO line named "FOO" on the schematic
  47          * "FOO_N" = GPIO line named "FOO" on schematic, active low
  48          */
  49         gpio-line-names = "ID_SDA",
  50                           "ID_SCL",
  51                           "SDA1",
  52                           "SCL1",
  53                           "GPIO_GCLK",
  54                           "GPIO5",
  55                           "GPIO6",
  56                           "SPI_CE1_N",
  57                           "SPI_CE0_N",
  58                           "SPI_MISO",
  59                           "SPI_MOSI",
  60                           "SPI_SCLK",
  61                           "GPIO12",
  62                           "GPIO13",
  63                           /* Serial port */
  64                           "TXD1",
  65                           "RXD1",
  66                           "GPIO16",
  67                           "GPIO17",
  68                           "GPIO18",
  69                           "GPIO19",
  70                           "GPIO20",
  71                           "GPIO21",
  72                           "GPIO22",
  73                           "GPIO23",
  74                           "GPIO24",
  75                           "GPIO25",
  76                           "GPIO26",
  77                           "GPIO27",
  78                           "HDMI_HPD_N",
  79                           "STATUS_LED_G",
  80                           /* Used by BT module */
  81                           "CTS0",
  82                           "RTS0",
  83                           "TXD0",
  84                           "RXD0",
  85                           /* Used by Wifi */
  86                           "SD1_CLK",
  87                           "SD1_CMD",
  88                           "SD1_DATA0",
  89                           "SD1_DATA1",
  90                           "SD1_DATA2",
  91                           "SD1_DATA3",
  92                           "PWM0_OUT",
  93                           "PWM1_OUT",
  94                           "", /* GPIO42 */
  95                           "WIFI_CLK",
  96                           "SDA0",
  97                           "SCL0",
  98                           "SMPS_SCL",
  99                           "SMPS_SDA",
 100                           /* Used by SD Card */
 101                           "SD_CLK_R",
 102                           "SD_CMD_R",
 103                           "SD_DATA0_R",
 104                           "SD_DATA1_R",
 105                           "SD_DATA2_R",
 106                           "SD_DATA3_R";
 107 };
 108
 109 &hdmi {
 110         hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
 111         power-domains = <&power RPI_POWER_DOMAIN_HDMI>;
 112         status = "okay";
 113 };
 114
 115 &led_act {
 116         gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
 117 };
 118
 119 &leds {
 120         led-pwr {
 121                 label = "PWR";
 122                 gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
 123                 default-state = "keep";
 124                 linux,default-trigger = "default-on";
 125         };
 126 };
 127
 128 &pwm {
 129         pinctrl-names = "default";
 130         pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
 131         status = "okay";
 132 };
 133
 134 /* SDHOST is used to drive the SD card */
 135 &sdhost {
 136         pinctrl-names = "default";
 137         pinctrl-0 = <&sdhost_gpio48>;
 138         status = "okay";
 139         bus-width = <4>;
 140 };
 141
 142 /* uart0 communicates with the BT module
 143  *
 144  * WL_REG_ON and BT_REG_ON of the CYW43455 Wifi/BT module are driven
 145  * by a single GPIO. We can't give GPIO control to one of the drivers,
 146  * otherwise the other part would get unexpectedly disturbed.
 147  */
 148 &uart0 {
 149         pinctrl-names = "default";
 150         pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
 151 };
 152
 153 /* uart1 is mapped to the pin header */
 154 &uart1 {
 155         pinctrl-names = "default";
 156         pinctrl-0 = <&uart1_gpio14>;
 157         status = "okay";
 158 };