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177 lines
3.9 KiB
Diff
177 lines
3.9 KiB
Diff
From 5216bb8a1257a8216362affe4757a96a36b60b32 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 11 Jun 2019 18:08:05 +0100
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Subject: [PATCH] arm: dts: First draft of upstream Pi4 DTS
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I've attempted to follow the upstream conventions in the DT commits,
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but this is just presented here initially as a talking point.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/Makefile | 1 +
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arch/arm/boot/dts/bcm2838-rpi-4-b.dts | 118 ++++++++++++++++++++++++++
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arch/arm/boot/dts/bcm2838-rpi.dtsi | 25 ++++++
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3 files changed, 144 insertions(+)
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create mode 100644 arch/arm/boot/dts/bcm2838-rpi-4-b.dts
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create mode 100644 arch/arm/boot/dts/bcm2838-rpi.dtsi
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--- a/arch/arm/boot/dts/Makefile
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+++ b/arch/arm/boot/dts/Makefile
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@@ -94,6 +94,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
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bcm2836-rpi-2-b.dtb \
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bcm2837-rpi-3-b.dtb \
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bcm2837-rpi-3-b-plus.dtb \
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+ bcm2838-rpi-4-b.dtb \
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bcm2835-rpi-zero.dtb \
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bcm2835-rpi-zero-w.dtb
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dtb-$(CONFIG_ARCH_BCM_5301X) += \
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--- /dev/null
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+++ b/arch/arm/boot/dts/bcm2838-rpi-4-b.dts
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@@ -0,0 +1,118 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/dts-v1/;
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+#include "bcm2838.dtsi"
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+#include "bcm2835-rpi.dtsi"
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+#include "bcm2838-rpi.dtsi"
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+
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+/ {
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+ compatible = "raspberrypi,4-model-b", "brcm,bcm2838";
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+ model = "Raspberry Pi 4 Model B";
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+
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+ chosen {
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+ /* 8250 auxiliary UART instead of pl011 */
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+ stdout-path = "serial1:115200n8";
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+ };
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+
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+ memory {
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+ reg = <0 0 0x40000000>;
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+ };
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+
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+ leds {
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+ act {
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+ gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
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+ };
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+
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+ pwr {
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+ label = "PWR";
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+ gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
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+ };
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+ };
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+
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+ wifi_pwrseq: wifi-pwrseq {
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+ compatible = "mmc-pwrseq-simple";
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+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
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+ };
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+
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+ sd_io_1v8_reg: sd_io_1v8_reg {
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+ status = "okay";
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+ compatible = "regulator-gpio";
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+ vin-supply = <&vdd_5v0_reg>;
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+ regulator-name = "vdd-sd-io";
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+ regulator-min-microvolt = <1800000>;
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+ regulator-max-microvolt = <3300000>;
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+ regulator-boot-on;
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+ regulator-always-on;
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+ regulator-settling-time-us = <5000>;
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+
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+ gpios = <&expgpio 4 GPIO_ACTIVE_HIGH>;
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+ states = <1800000 0x1
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+ 3300000 0x0>;
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+ };
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+};
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+
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+&firmware {
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+ expgpio: gpio {
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+ compatible = "raspberrypi,firmware-gpio";
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+ gpio-controller;
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+ #gpio-cells = <2>;
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+ gpio-line-names = "BT_ON",
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+ "WL_ON",
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+ "PWR_LED_OFF",
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+ "GLOBAL_RESET",
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+ "VDD_SD_IO_SEL",
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+ "CAM_GPIO",
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+ "",
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+ "";
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+ status = "okay";
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+ };
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+};
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+
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+&pwm1 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
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+ status = "okay";
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+};
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+
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+/* SDHCI is used to control the SDIO for wireless */
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+&sdhci {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&emmc_gpio34>;
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+ status = "okay";
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+ bus-width = <4>;
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+ non-removable;
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+ mmc-pwrseq = <&wifi_pwrseq>;
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+
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+ brcmf: wifi@1 {
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+ reg = <1>;
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+ compatible = "brcm,bcm4329-fmac";
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+ };
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+};
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+
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+/* EMMC2 is used to drive the SD card */
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+&emmc2 {
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+ status = "okay";
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+ broken-cd;
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+ vqmmc-supply = <&sd_io_1v8_reg>;
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+};
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+
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+/* uart0 communicates with the BT module */
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+&uart0 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
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+ status = "okay";
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+
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+ bluetooth {
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+ compatible = "brcm,bcm43438-bt";
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+ max-speed = <2000000>;
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+ shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
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+ };
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+};
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+
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+/* uart1 is mapped to the pin header */
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+&uart1 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&uart1_gpio14>;
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+ status = "okay";
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+};
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--- /dev/null
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+++ b/arch/arm/boot/dts/bcm2838-rpi.dtsi
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@@ -0,0 +1,25 @@
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+// SPDX-License-Identifier: GPL-2.0
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+
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+/ {
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+ soc {
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+ /delete-node/ mailbox@7e00b840;
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+ };
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+};
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+
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+&scb {
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+ vchiq: mailbox@7e00b840 {
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+ compatible = "brcm,bcm2838-vchiq";
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+ reg = <0 0x7e00b840 0x3c>;
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+ interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
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+ };
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+};
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+
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+&dma {
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+ /* The VPU firmware uses DMA channel 11 for VCHIQ */
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+ brcm,dma-channel-mask = <0x1f5>;
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+};
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+
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+&dma40 {
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+ /* The VPU firmware DMA channel 11 for VCHIQ */
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+ brcm,dma-channel-mask = <0x7000>;
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+};
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