1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
From 5216bb8a1257a8216362affe4757a96a36b60b32 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 11 Jun 2019 18:08:05 +0100
Subject: [PATCH] arm: dts: First draft of upstream Pi4 DTS
I've attempted to follow the upstream conventions in the DT commits,
but this is just presented here initially as a talking point.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/bcm2838-rpi-4-b.dts | 118 ++++++++++++++++++++++++++
arch/arm/boot/dts/bcm2838-rpi.dtsi | 25 ++++++
3 files changed, 144 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm2838-rpi-4-b.dts
create mode 100644 arch/arm/boot/dts/bcm2838-rpi.dtsi
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -94,6 +94,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
bcm2836-rpi-2-b.dtb \
bcm2837-rpi-3-b.dtb \
bcm2837-rpi-3-b-plus.dtb \
+ bcm2838-rpi-4-b.dtb \
bcm2835-rpi-zero.dtb \
bcm2835-rpi-zero-w.dtb
dtb-$(CONFIG_ARCH_BCM_5301X) += \
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2838-rpi-4-b.dts
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2838.dtsi"
+#include "bcm2835-rpi.dtsi"
+#include "bcm2838-rpi.dtsi"
+
+/ {
+ compatible = "raspberrypi,4-model-b", "brcm,bcm2838";
+ model = "Raspberry Pi 4 Model B";
+
+ chosen {
+ /* 8250 auxiliary UART instead of pl011 */
+ stdout-path = "serial1:115200n8";
+ };
+
+ memory {
+ reg = <0 0 0x40000000>;
+ };
+
+ leds {
+ act {
+ gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
+ };
+
+ pwr {
+ label = "PWR";
+ gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ wifi_pwrseq: wifi-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
+ };
+
+ sd_io_1v8_reg: sd_io_1v8_reg {
+ status = "okay";
+ compatible = "regulator-gpio";
+ vin-supply = <&vdd_5v0_reg>;
+ regulator-name = "vdd-sd-io";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-settling-time-us = <5000>;
+
+ gpios = <&expgpio 4 GPIO_ACTIVE_HIGH>;
+ states = <1800000 0x1
+ 3300000 0x0>;
+ };
+};
+
+&firmware {
+ expgpio: gpio {
+ compatible = "raspberrypi,firmware-gpio";
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-line-names = "BT_ON",
+ "WL_ON",
+ "PWR_LED_OFF",
+ "GLOBAL_RESET",
+ "VDD_SD_IO_SEL",
+ "CAM_GPIO",
+ "",
+ "";
+ status = "okay";
+ };
+};
+
+&pwm1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
+ status = "okay";
+};
+
+/* SDHCI is used to control the SDIO for wireless */
+&sdhci {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&emmc_gpio34>;
+ status = "okay";
+ bus-width = <4>;
+ non-removable;
+ mmc-pwrseq = <&wifi_pwrseq>;
+
+ brcmf: wifi@1 {
+ reg = <1>;
+ compatible = "brcm,bcm4329-fmac";
+ };
+};
+
+/* EMMC2 is used to drive the SD card */
+&emmc2 {
+ status = "okay";
+ broken-cd;
+ vqmmc-supply = <&sd_io_1v8_reg>;
+};
+
+/* uart0 communicates with the BT module */
+&uart0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
+ status = "okay";
+
+ bluetooth {
+ compatible = "brcm,bcm43438-bt";
+ max-speed = <2000000>;
+ shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
+ };
+};
+
+/* uart1 is mapped to the pin header */
+&uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_gpio14>;
+ status = "okay";
+};
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2838-rpi.dtsi
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/ {
+ soc {
+ /delete-node/ mailbox@7e00b840;
+ };
+};
+
+&scb {
+ vchiq: mailbox@7e00b840 {
+ compatible = "brcm,bcm2838-vchiq";
+ reg = <0 0x7e00b840 0x3c>;
+ interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+ };
+};
+
+&dma {
+ /* The VPU firmware uses DMA channel 11 for VCHIQ */
+ brcm,dma-channel-mask = <0x1f5>;
+};
+
+&dma40 {
+ /* The VPU firmware DMA channel 11 for VCHIQ */
+ brcm,dma-channel-mask = <0x7000>;
+};
|
