openwrt/target/linux/bcm27xx/patches-4.19/950-0438-BCM270X_DT-Create-bcm2708-rpi-zero.dts.patch

From e819b50b0c384f11f4eaf6e1ea76030c320f4511 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 28 May 2019 16:23:51 +0100
Subject: [PATCH] BCM270X_DT: Create bcm2708-rpi-zero.dts

The Pi Zero deserves a dedicated .dtb file - sharing the b-plus .dtb
has been observed to cause an issue with the MAC address of some
Ethernet dongles.

See: https://github.com/raspberrypi/linux/issues/2990

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 arch/arm/boot/dts/Makefile             |   1 +
 arch/arm/boot/dts/bcm2708-rpi-zero.dts | 117 +++++++++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 arch/arm/boot/dts/bcm2708-rpi-zero.dts

--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -4,6 +4,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2708-rpi-b.dtb \
 	bcm2708-rpi-b-plus.dtb \
 	bcm2708-rpi-cm.dtb \
+	bcm2708-rpi-zero.dtb \
 	bcm2708-rpi-zero-w.dtb \
 	bcm2709-rpi-2-b.dtb \
 	bcm2710-rpi-3-b.dtb \
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2708-rpi-zero.dts
@@ -0,0 +1,117 @@
+/dts-v1/;
+
+#include "bcm2708.dtsi"
+#include "bcm283x-rpi-csi1-2lane.dtsi"
+
+/ {
+	compatible = "raspberrypi,model-zero", "brcm,bcm2835";
+	model = "Raspberry Pi Zero";
+
+	chosen {
+		bootargs = "coherent_pool=1M";
+	};
+};
+
+&gpio {
+	spi0_pins: spi0_pins {
+		brcm,pins = <9 10 11>;
+		brcm,function = <4>; /* alt0 */
+	};
+
+	spi0_cs_pins: spi0_cs_pins {
+		brcm,pins = <8 7>;
+		brcm,function = <1>; /* output */
+	};
+
+	i2c0_pins: i2c0 {
+		brcm,pins = <0 1>;
+		brcm,function = <4>;
+	};
+
+	i2c1_pins: i2c1 {
+		brcm,pins = <2 3>;
+		brcm,function = <4>;
+	};
+
+	i2s_pins: i2s {
+		brcm,pins = <18 19 20 21>;
+		brcm,function = <4>; /* alt0 */
+	};
+
+	audio_pins: audio_pins {
+		brcm,pins = <>;
+		brcm,function = <>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
+	cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
+
+	spidev0: spidev@0{
+		compatible = "spidev";
+		reg = <0>;	/* CE0 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <125000000>;
+	};
+
+	spidev1: spidev@1{
+		compatible = "spidev";
+		reg = <1>;	/* CE1 */
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <125000000>;
+	};
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+};
+
+&i2c2 {
+	clock-frequency = <100000>;
+};
+
+&i2s {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 47 0>;
+	};
+};
+
+&hdmi {
+	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
+};
+
+&audio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&audio_pins>;
+};
+
+/ {
+	__overrides__ {
+		act_led_gpio = <&act_led>,"gpios:4";
+		act_led_activelow = <&act_led>,"gpios:8";
+		act_led_trigger = <&act_led>,"linux,default-trigger";
+	};
+};