435 lines
9.7 KiB
Diff
435 lines
9.7 KiB
Diff
From 77d7427bed21c92d1c10e0cc9beabb5ce9bb6c0b Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 9 Apr 2020 12:46:13 +0100
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Subject: [PATCH] dt: Implement an I2C pinctrl mux for BSC0.
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BSC0 serves either the HAT EEPROM pins on the 40pin connector,
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or the display and camera on a board specific pairing of either
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GPIO 28&29, or 44&45.
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Use I2C_MUX_PINCTRL to allow exposing both pairs of pins as I2C
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busses.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 9 ++++---
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arch/arm/boot/dts/bcm2708-rpi-b.dts | 9 ++++---
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arch/arm/boot/dts/bcm2708-rpi-cm.dts | 9 ++++---
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arch/arm/boot/dts/bcm2708-rpi-zero-w.dts | 9 ++++---
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arch/arm/boot/dts/bcm2708-rpi-zero.dts | 9 ++++---
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arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 9 ++++---
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arch/arm/boot/dts/bcm270x-rpi.dtsi | 7 ++---
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arch/arm/boot/dts/bcm2710-rpi-2-b.dts | 9 ++++---
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arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts | 9 ++++---
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arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 9 ++++---
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arch/arm/boot/dts/bcm2710-rpi-cm3.dts | 10 ++++---
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arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 5 ++--
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arch/arm/boot/dts/bcm2711.dtsi | 2 +-
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.../boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi | 4 +++
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.../boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi | 4 +++
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arch/arm/boot/dts/bcm283x.dtsi | 26 ++++++++++++++++++-
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16 files changed, 100 insertions(+), 39 deletions(-)
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create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi
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create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi
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--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
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+++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
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@@ -4,6 +4,7 @@
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#include "bcm2708-rpi.dtsi"
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#include "bcm283x-rpi-smsc9514.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,model-b-plus", "brcm,bcm2835";
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@@ -68,12 +69,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
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+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
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@@ -4,6 +4,7 @@
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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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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,model-b", "brcm,bcm2835";
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@@ -68,12 +69,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts
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+++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
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@@ -3,6 +3,7 @@
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#include "bcm2708-rpi-cm.dtsi"
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#include "bcm283x-rpi-csi0-2lane.dtsi"
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#include "bcm283x-rpi-csi1-4lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,compute-module", "brcm,bcm2835";
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@@ -67,12 +68,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
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+++ b/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
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@@ -3,6 +3,7 @@
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#include "bcm2708.dtsi"
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#include "bcm2708-rpi.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
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@@ -116,12 +117,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2708-rpi-zero.dts
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+++ b/arch/arm/boot/dts/bcm2708-rpi-zero.dts
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@@ -3,6 +3,7 @@
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#include "bcm2708.dtsi"
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#include "bcm2708-rpi.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,model-zero", "brcm,bcm2835";
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@@ -71,12 +72,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
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+++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
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@@ -4,6 +4,7 @@
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#include "bcm2709-rpi.dtsi"
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#include "bcm283x-rpi-smsc9514.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
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@@ -68,12 +69,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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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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@@ -21,6 +21,7 @@
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i2s = &i2s;
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i2c0 = &i2c0;
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i2c1 = &i2c1;
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+ i2c10 = &i2c_csi_dsi;
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spi0 = &spi0;
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spi1 = &spi1;
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spi2 = &spi2;
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@@ -83,9 +84,9 @@
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uart1 = <&uart1>,"status";
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i2s = <&i2s>,"status";
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spi = <&spi0>,"status";
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- i2c0 = <&i2c0>,"status";
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+ i2c0 = <&i2c0if>,"status",<&i2c0mux>,"status";
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i2c1 = <&i2c1>,"status";
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- i2c0_baudrate = <&i2c0>,"clock-frequency:0";
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+ i2c0_baudrate = <&i2c0if>,"clock-frequency:0";
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i2c1_baudrate = <&i2c1>,"clock-frequency:0";
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audio = <&audio>,"status";
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@@ -105,7 +106,7 @@
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status = "disabled";
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};
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-&i2c0 {
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+&i2c0if {
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status = "disabled";
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};
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--- a/arch/arm/boot/dts/bcm2710-rpi-2-b.dts
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+++ b/arch/arm/boot/dts/bcm2710-rpi-2-b.dts
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@@ -4,6 +4,7 @@
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#include "bcm2709-rpi.dtsi"
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#include "bcm283x-rpi-smsc9514.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,2-model-b-rev2", "brcm,bcm2837";
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@@ -68,12 +69,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
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+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
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@@ -4,6 +4,7 @@
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#include "bcm2709-rpi.dtsi"
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#include "bcm283x-rpi-lan7515.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
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/ {
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compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
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@@ -126,12 +127,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
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+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
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@@ -4,6 +4,7 @@
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#include "bcm2709-rpi.dtsi"
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#include "bcm283x-rpi-smsc9514.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
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/ {
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compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
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@@ -137,12 +138,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
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+++ b/arch/arm/boot/dts/bcm2710-rpi-cm3.dts
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@@ -4,7 +4,7 @@
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#include "bcm2709-rpi.dtsi"
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#include "bcm283x-rpi-csi0-2lane.dtsi"
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#include "bcm283x-rpi-csi1-4lane.dtsi"
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-
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+#include "bcm283x-rpi-i2c0mux_0_28.dtsi"
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/ {
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compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
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model = "Raspberry Pi Compute Module 3";
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@@ -88,12 +88,14 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_pins>;
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+};
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+
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&i2c1 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
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+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
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@@ -192,6 +192,7 @@
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#include "bcm2711-rpi.dtsi"
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#include "bcm283x-rpi-csi1-2lane.dtsi"
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+#include "bcm283x-rpi-i2c0mux_0_44.dtsi"
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/delete-node/ &emmc2;
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@@ -421,9 +422,7 @@
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};
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};
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-&i2c0 {
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- pinctrl-names = "default";
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- pinctrl-0 = <&i2c0_pins>;
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+&i2c0if {
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clock-frequency = <100000>;
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};
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--- a/arch/arm/boot/dts/bcm2711.dtsi
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+++ b/arch/arm/boot/dts/bcm2711.dtsi
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@@ -986,7 +986,7 @@
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alloc-ranges = <0x0 0x00000000 0x40000000>;
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};
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-&i2c0 {
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+&i2c0if {
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compatible = "brcm,bcm2711-i2c", "brcm,bcm2835-i2c";
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interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
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};
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--- /dev/null
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+++ b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_28.dtsi
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@@ -0,0 +1,4 @@
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_gpio0>;
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+ pinctrl-1 = <&i2c0_gpio28>;
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+};
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--- /dev/null
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+++ b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi
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@@ -0,0 +1,4 @@
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+&i2c0mux {
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+ pinctrl-0 = <&i2c0_gpio0>;
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+ pinctrl-1 = <&i2c0_gpio44>;
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+};
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--- a/arch/arm/boot/dts/bcm283x.dtsi
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+++ b/arch/arm/boot/dts/bcm283x.dtsi
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@@ -341,7 +341,7 @@
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status = "disabled";
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};
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- i2c0: i2c@7e205000 {
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+ i2c0if: i2c@7e205000 {
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compatible = "brcm,bcm2835-i2c";
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reg = <0x7e205000 0x200>;
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interrupts = <2 21>;
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@@ -351,6 +351,30 @@
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status = "disabled";
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};
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+ i2c0mux: i2c0mux {
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+ compatible = "i2c-mux-pinctrl";
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ i2c-parent = <&i2c0if>;
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+
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+ pinctrl-names = "i2c0", "i2c_csi_dsi";
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+
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+ status = "disabled";
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+
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+ i2c0: i2c@0 {
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+ reg = <0>;
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ };
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+
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+ i2c_csi_dsi: i2c@1 {
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+ reg = <1>;
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ };
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+ };
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+
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dpi: dpi@7e208000 {
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compatible = "brcm,bcm2835-dpi";
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reg = <0x7e208000 0x8c>;
|