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183 lines
3.9 KiB
Diff
183 lines
3.9 KiB
Diff
From bd291f0ff613ad270a7c9352f3f27a09c058553f Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 21 Apr 2020 17:34:27 +0100
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Subject: [PATCH] ARM: dts: Create bcm2708-rpi-b-rev1.dts
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The first revision of the Pi Model B used I2C0 to address the camera
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and I2C0 was available for user applications on the 26-pin header.
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The second revision switched the roles, kept I2C0 on the 26-pin header
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and added I2C1 on a new 8-way header (P5).
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Up to now, downstream DTS has used a single file for both revisions of
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the board, with a small amount of patching from the firmware. With the
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introduction of an I2C mux to share I2C0 between the camera/display
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connectors and the IDC headers, the difference between the two versions
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becomes too great to comfortably manage with tweaking, hence this split.
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Upstream DTS files already have bcm2835-rpi-b.dts and
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bcm2835-rpi-b-rev2.dts, but for backwards compatibility the new file is
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being added as bcm2708-rpi-b-rev1.dts, rather than renaming the old
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shared version to bcm2708-rpi-b-rev2.dts.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/Makefile | 1 +
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arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts | 127 +++++++++++++++++++++++
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arch/arm/boot/dts/bcm270x-rpi.dtsi | 4 +
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3 files changed, 132 insertions(+)
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create mode 100644 arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts
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--- a/arch/arm/boot/dts/Makefile
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+++ b/arch/arm/boot/dts/Makefile
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@@ -2,6 +2,7 @@
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dtb-$(CONFIG_ARCH_BCM2835) += \
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bcm2708-rpi-b.dtb \
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+ bcm2708-rpi-b-rev1.dtb \
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bcm2708-rpi-b-plus.dtb \
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bcm2708-rpi-cm.dtb \
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bcm2708-rpi-zero.dtb \
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--- /dev/null
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+++ b/arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts
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@@ -0,0 +1,127 @@
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+/dts-v1/;
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+
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+#include "bcm2708.dtsi"
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+#include "bcm2708-rpi.dtsi"
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+#include "bcm283x-rpi-smsc9512.dtsi"
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+#include "bcm283x-rpi-csi1-2lane.dtsi"
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+
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+/ {
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+ compatible = "raspberrypi,model-b", "brcm,bcm2835";
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+ model = "Raspberry Pi Model B";
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+};
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+
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+&gpio {
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+ spi0_pins: spi0_pins {
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+ brcm,pins = <9 10 11>;
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+ brcm,function = <4>; /* alt0 */
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+ };
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+
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+ spi0_cs_pins: spi0_cs_pins {
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+ brcm,pins = <8 7>;
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+ brcm,function = <1>; /* output */
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+ };
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+
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+ i2c0_pins: i2c0 {
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+ brcm,pins = <0 1>;
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+ brcm,function = <4>;
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+ };
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+
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+ i2c1_pins: i2c1 {
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+ brcm,pins = <2 3>;
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+ brcm,function = <4>;
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+ };
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+
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+ i2s_pins: i2s {
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+ brcm,pins = <28 29 30 31>;
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+ brcm,function = <6>; /* alt2 */
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+ };
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+
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+ audio_pins: audio_pins {
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+ brcm,pins = <40 45>;
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+ brcm,function = <4>;
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+ };
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+};
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+
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+&uart0 {
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+ status = "okay";
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+};
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+
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+&spi0 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
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+ cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
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+
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+ spidev0: spidev@0{
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+ compatible = "spidev";
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+ reg = <0>; /* CE0 */
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ spi-max-frequency = <125000000>;
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+ };
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+
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+ spidev1: spidev@1{
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+ compatible = "spidev";
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+ reg = <1>; /* CE1 */
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ spi-max-frequency = <125000000>;
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+ };
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+};
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+
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+/delete-node/ &i2c0mux;
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+
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+i2c0: &i2c0if {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&i2c0_pins>;
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+ clock-frequency = <100000>;
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+};
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+
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+i2c_csi_dsi: &i2c1 {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&i2c1_pins>;
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+ clock-frequency = <100000>;
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+};
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+
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+/ {
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+ aliases {
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+ i2c0 = &i2c0;
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+ };
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+
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+ __overrides__ {
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+ i2c0 = <&i2c0>, "status";
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+ };
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+};
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+
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+&i2c2 {
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+ clock-frequency = <100000>;
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+};
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+
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+&i2s {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&i2s_pins>;
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+};
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+
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+&leds {
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+ act_led: act {
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+ label = "led0";
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+ linux,default-trigger = "mmc0";
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+ gpios = <&gpio 16 1>;
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+ };
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+};
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+
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+&hdmi {
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+ hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
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+};
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+
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+&audio {
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&audio_pins>;
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+};
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+
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+/ {
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+ __overrides__ {
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+ act_led_gpio = <&act_led>,"gpios:4";
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+ act_led_activelow = <&act_led>,"gpios:8";
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+ act_led_trigger = <&act_led>,"linux,default-trigger";
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+ };
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+};
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--- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
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+++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
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@@ -110,6 +110,10 @@
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status = "disabled";
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};
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+&i2c0mux {
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+ status = "disabled";
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+};
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+
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&i2c1 {
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status = "disabled";
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};
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