From bd291f0ff613ad270a7c9352f3f27a09c058553f Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Tue, 21 Apr 2020 17:34:27 +0100
Subject: [PATCH] ARM: dts: Create bcm2708-rpi-b-rev1.dts

The first revision of the Pi Model B used I2C0 to address the camera
and I2C0 was available for user applications on the 26-pin header.
The second revision switched the roles, kept I2C0 on the 26-pin header
and added I2C1 on a new 8-way header (P5).

Up to now, downstream DTS has used a single file for both revisions of
the board, with a small amount of patching from the firmware. With the
introduction of an I2C mux to share I2C0 between the camera/display
connectors and the IDC headers, the difference between the two versions
becomes too great to comfortably manage with tweaking, hence this split.

Upstream DTS files already have bcm2835-rpi-b.dts and
bcm2835-rpi-b-rev2.dts, but for backwards compatibility the new file is
being added as bcm2708-rpi-b-rev1.dts, rather than renaming the old
shared version to bcm2708-rpi-b-rev2.dts.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 arch/arm/boot/dts/Makefile               |   1 +
 arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts | 127 +++++++++++++++++++++++
 arch/arm/boot/dts/bcm270x-rpi.dtsi       |   4 +
 3 files changed, 132 insertions(+)
 create mode 100644 arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts

--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -2,6 +2,7 @@
 
 dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2708-rpi-b.dtb \
+	bcm2708-rpi-b-rev1.dtb \
 	bcm2708-rpi-b-plus.dtb \
 	bcm2708-rpi-cm.dtb \
 	bcm2708-rpi-zero.dtb \
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts
@@ -0,0 +1,127 @@
+/dts-v1/;
+
+#include "bcm2708.dtsi"
+#include "bcm2708-rpi.dtsi"
+#include "bcm283x-rpi-smsc9512.dtsi"
+#include "bcm283x-rpi-csi1-2lane.dtsi"
+
+/ {
+	compatible = "raspberrypi,model-b", "brcm,bcm2835";
+	model = "Raspberry Pi Model B";
+};
+
+&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 = <28 29 30 31>;
+		brcm,function = <6>; /* alt2 */
+	};
+
+	audio_pins: audio_pins {
+		brcm,pins = <40 45>;
+		brcm,function = <4>;
+	};
+};
+
+&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>;
+	};
+};
+
+/delete-node/ &i2c0mux;
+
+i2c0: &i2c0if {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	clock-frequency = <100000>;
+};
+
+i2c_csi_dsi: &i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+};
+
+/ {
+	aliases {
+		i2c0 = &i2c0;
+	};
+
+	__overrides__ {
+		i2c0 = <&i2c0>, "status";
+	};
+};
+
+&i2c2 {
+	clock-frequency = <100000>;
+};
+
+&i2s {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+};
+
+&leds {
+	act_led: act {
+		label = "led0";
+		linux,default-trigger = "mmc0";
+		gpios = <&gpio 16 1>;
+	};
+};
+
+&hdmi {
+	hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
+};
+
+&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";
+	};
+};
--- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
@@ -110,6 +110,10 @@
 	status = "disabled";
 };
 
+&i2c0mux {
+	status = "disabled";
+};
+
 &i2c1 {
 	status = "disabled";
 };