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";
};