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}; 159