xref: /linux/arch/arm/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts (revision 2f98e686ef59b5d19af5847d755798e2031bee3a) 
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