The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/src/arm/bcm2837-rpi-3-b-plus.dts

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    1 // SPDX-License-Identifier: GPL-2.0
    2 /dts-v1/;
    3 #include "bcm2837.dtsi"
    4 #include "bcm2836-rpi.dtsi"
    5 #include "bcm283x-rpi-lan7515.dtsi"
    6 #include "bcm283x-rpi-usb-host.dtsi"
    7 #include "bcm283x-rpi-wifi-bt.dtsi"
    8 
    9 / {
   10         compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
   11         model = "Raspberry Pi 3 Model B+";
   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 0x40000000>;
   21         };
   22 
   23         leds {
   24                 led-act {
   25                         gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
   26                 };
   27 
   28                 led-pwr {
   29                         label = "PWR";
   30                         gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
   31                         default-state = "keep";
   32                         linux,default-trigger = "default-on";
   33                 };
   34         };
   35 };
   36 
   37 &bt {
   38         shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
   39 };
   40 
   41 &firmware {
   42         expgpio: gpio {
   43                 compatible = "raspberrypi,firmware-gpio";
   44                 gpio-controller;
   45                 #gpio-cells = <2>;
   46                 gpio-line-names = "BT_ON",
   47                                   "WL_ON",
   48                                   "PWR_LED_R",
   49                                   "LAN_RUN",
   50                                   "",
   51                                   "CAM_GPIO0",
   52                                   "CAM_GPIO1",
   53                                   "";
   54                 status = "okay";
   55         };
   56 };
   57 
   58 &gpio {
   59         /*
   60          * Taken from rpi_SCH_3bplus_1p0_reduced.pdf and
   61          * the official GPU firmware DT blob.
   62          *
   63          * Legend:
   64          * "FOO" = GPIO line named "FOO" on the schematic
   65          * "FOO_N" = GPIO line named "FOO" on schematic, active low
   66          */
   67         gpio-line-names = "ID_SDA",
   68                           "ID_SCL",
   69                           "SDA1",
   70                           "SCL1",
   71                           "GPIO_GCLK",
   72                           "GPIO5",
   73                           "GPIO6",
   74                           "SPI_CE1_N",
   75                           "SPI_CE0_N",
   76                           "SPI_MISO",
   77                           "SPI_MOSI",
   78                           "SPI_SCLK",
   79                           "GPIO12",
   80                           "GPIO13",
   81                           /* Serial port */
   82                           "TXD1",
   83                           "RXD1",
   84                           "GPIO16",
   85                           "GPIO17",
   86                           "GPIO18",
   87                           "GPIO19",
   88                           "GPIO20",
   89                           "GPIO21",
   90                           "GPIO22",
   91                           "GPIO23",
   92                           "GPIO24",
   93                           "GPIO25",
   94                           "GPIO26",
   95                           "GPIO27",
   96                           "HDMI_HPD_N",
   97                           "STATUS_LED_G",
   98                           /* Used by BT module */
   99                           "CTS0",
  100                           "RTS0",
  101                           "TXD0",
  102                           "RXD0",
  103                           /* Used by Wifi */
  104                           "SD1_CLK",
  105                           "SD1_CMD",
  106                           "SD1_DATA0",
  107                           "SD1_DATA1",
  108                           "SD1_DATA2",
  109                           "SD1_DATA3",
  110                           "PWM0_OUT",
  111                           "PWM1_OUT",
  112                           "ETH_CLK",
  113                           "WIFI_CLK",
  114                           "SDA0",
  115                           "SCL0",
  116                           "SMPS_SCL",
  117                           "SMPS_SDA",
  118                           /* Used by SD Card */
  119                           "SD_CLK_R",
  120                           "SD_CMD_R",
  121                           "SD_DATA0_R",
  122                           "SD_DATA1_R",
  123                           "SD_DATA2_R",
  124                           "SD_DATA3_R";
  125 };
  126 
  127 &hdmi {
  128         hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
  129         power-domains = <&power RPI_POWER_DOMAIN_HDMI>;
  130         status = "okay";
  131 };
  132 
  133 &pwm {
  134         pinctrl-names = "default";
  135         pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
  136         status = "okay";
  137 };
  138 
  139 /* SDHOST is used to drive the SD card */
  140 &sdhost {
  141         pinctrl-names = "default";
  142         pinctrl-0 = <&sdhost_gpio48>;
  143         status = "okay";
  144         bus-width = <4>;
  145 };
  146 
  147 /* uart0 communicates with the BT module */
  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 };
  159 
  160 &wifi_pwrseq {
  161         reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
  162 };

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