0001 // SPDX-License-Identifier: GPL-2.0
0002 /dts-v1/;
0003 #include "bcm2837.dtsi"
0004 #include "bcm2836-rpi.dtsi"
0005 #include "bcm283x-rpi-usb-host.dtsi"
0006 #include "bcm283x-rpi-wifi-bt.dtsi"
0007
0008 / {
0009 compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
0010 model = "Raspberry Pi 3 Model A+";
0011
0012 chosen {
0013 /* 8250 auxiliary UART instead of pl011 */
0014 stdout-path = "serial1:115200n8";
0015 };
0016
0017 memory@0 {
0018 device_type = "memory";
0019 reg = <0 0x20000000>;
0020 };
0021
0022 leds {
0023 led-act {
0024 gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
0025 };
0026
0027 led-pwr {
0028 label = "PWR";
0029 gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
0030 default-state = "keep";
0031 linux,default-trigger = "default-on";
0032 };
0033 };
0034 };
0035
0036 &firmware {
0037 expgpio: gpio {
0038 compatible = "raspberrypi,firmware-gpio";
0039 gpio-controller;
0040 #gpio-cells = <2>;
0041 gpio-line-names = "",
0042 "BT_WL_ON",
0043 "STATUS_LED_R",
0044 "",
0045 "",
0046 "CAM_GPIO0",
0047 "CAM_GPIO1",
0048 "";
0049 status = "okay";
0050 };
0051 };
0052
0053 &gpio {
0054 /*
0055 * This is mostly based on the official GPU firmware DT blob.
0056 *
0057 * Legend:
0058 * "FOO" = GPIO line named "FOO" on the schematic
0059 * "FOO_N" = GPIO line named "FOO" on schematic, active low
0060 */
0061 gpio-line-names = "ID_SDA",
0062 "ID_SCL",
0063 "SDA1",
0064 "SCL1",
0065 "GPIO_GCLK",
0066 "GPIO5",
0067 "GPIO6",
0068 "SPI_CE1_N",
0069 "SPI_CE0_N",
0070 "SPI_MISO",
0071 "SPI_MOSI",
0072 "SPI_SCLK",
0073 "GPIO12",
0074 "GPIO13",
0075 /* Serial port */
0076 "TXD1",
0077 "RXD1",
0078 "GPIO16",
0079 "GPIO17",
0080 "GPIO18",
0081 "GPIO19",
0082 "GPIO20",
0083 "GPIO21",
0084 "GPIO22",
0085 "GPIO23",
0086 "GPIO24",
0087 "GPIO25",
0088 "GPIO26",
0089 "GPIO27",
0090 "HDMI_HPD_N",
0091 "STATUS_LED_G",
0092 /* Used by BT module */
0093 "CTS0",
0094 "RTS0",
0095 "TXD0",
0096 "RXD0",
0097 /* Used by Wifi */
0098 "SD1_CLK",
0099 "SD1_CMD",
0100 "SD1_DATA0",
0101 "SD1_DATA1",
0102 "SD1_DATA2",
0103 "SD1_DATA3",
0104 "PWM0_OUT",
0105 "PWM1_OUT",
0106 "", /* GPIO42 */
0107 "WIFI_CLK",
0108 "SDA0",
0109 "SCL0",
0110 "SMPS_SCL",
0111 "SMPS_SDA",
0112 /* Used by SD Card */
0113 "SD_CLK_R",
0114 "SD_CMD_R",
0115 "SD_DATA0_R",
0116 "SD_DATA1_R",
0117 "SD_DATA2_R",
0118 "SD_DATA3_R";
0119 };
0120
0121 &hdmi {
0122 hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
0123 power-domains = <&power RPI_POWER_DOMAIN_HDMI>;
0124 status = "okay";
0125 };
0126
0127 &pwm {
0128 pinctrl-names = "default";
0129 pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
0130 status = "okay";
0131 };
0132
0133 /* SDHOST is used to drive the SD card */
0134 &sdhost {
0135 pinctrl-names = "default";
0136 pinctrl-0 = <&sdhost_gpio48>;
0137 status = "okay";
0138 bus-width = <4>;
0139 };
0140
0141 /* uart0 communicates with the BT module
0142 *
0143 * WL_REG_ON and BT_REG_ON of the CYW43455 Wifi/BT module are driven
0144 * by a single GPIO. We can't give GPIO control to one of the drivers,
0145 * otherwise the other part would get unexpectedly disturbed.
0146 */
0147 &uart0 {
0148 pinctrl-names = "default";
0149 pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
0150 };
0151
0152 /* uart1 is mapped to the pin header */
0153 &uart1 {
0154 pinctrl-names = "default";
0155 pinctrl-0 = <&uart1_gpio14>;
0156 status = "okay";
0157 };
