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openwrt/target/linux/brcm2708/patches-4.4/0341-BCM270X_DT-Add-umbrella-I2C-Mux-overlay-i2c-mux.patch
Álvaro Fernández Rojas 2b1c6b21b5 brcm2708: update linux 4.4 patches to latest version 
As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-09-10 14:54:26 +02:00

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From ee32bb475a3986f961466e00f5ed0bc1fb708699 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 11 May 2016 15:38:04 +0100
Subject: [PATCH] BCM270X_DT: Add umbrella I2C Mux overlay i2c-mux
This overlay supports a range of I2C multiplexers - PCA9542 (2 ports),
PCA9545 (4 ports) and PCA9548 (8 ports).
Also remove the dedicated i2c-mux-9548a overlays since it is no longer
needed.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 2 +-
arch/arm/boot/dts/overlays/README | 17 ++-
arch/arm/boot/dts/overlays/i2c-mux-overlay.dts | 138 +++++++++++++++++++++
.../boot/dts/overlays/i2c-mux-pca9548a-overlay.dts | 67 ----------
4 files changed, 152 insertions(+), 72 deletions(-)
create mode 100644 arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
delete mode 100644 arch/arm/boot/dts/overlays/i2c-mux-pca9548a-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -34,7 +34,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hy28a.dtbo
dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
-dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9548a.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += i2c-mux.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -421,10 +421,19 @@ Params: i2c_gpio_sda GPIO use
(default "2" = ~100kHz)
-Name: i2c-mux-pca9548a
-Info: Adds support for an NXP PCA9548A I2C multiplexer on i2c_arm
-Load: dtoverlay=i2c-mux-pca9548a,<param>=<val>
-Params: addr I2C address of PCA9548A (default 0x70)
+Name: i2c-mux
+Info: Adds support for a number of I2C bus multiplexers on i2c_arm
+Load: dtoverlay=i2c-mux,<param>=<val>
+Params: pca9542 Select the NXP PCA9542 device
+
+ pca9545 Select the NXP PCA9545 device
+
+ pca9548 Select the NXP PCA9548 device
+
+ addr Change I2C address of the device (default 0x70)
+
+
+[ The i2c-mux-pca9548a overlay has been deleted. See i2c-mux. ]
Name: i2c-pwm-pca9685a
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
@@ -0,0 +1,138 @@
+// Umbrella I2C Mux overlay
+
+/dts-v1/;
+/plugin/;
+
+/{
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&i2c_arm>;
+ __dormant__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ pca9542: mux@70 {
+ compatible = "nxp,pca9542";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ };
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ };
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&i2c_arm>;
+ __dormant__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ pca9545: mux@70 {
+ compatible = "nxp,pca9545";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ };
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ };
+ i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ };
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+ };
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&i2c_arm>;
+ __dormant__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ pca9548: mux@70 {
+ compatible = "nxp,pca9548";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+ };
+ i2c@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ };
+ i2c@2 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <2>;
+ };
+ i2c@3 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <3>;
+ };
+ i2c@4 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <4>;
+ };
+ i2c@5 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <5>;
+ };
+ i2c@6 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <6>;
+ };
+ i2c@7 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <7>;
+ };
+ };
+ };
+ };
+
+ __overrides__ {
+ pca9542 = <0>, "+0";
+ pca9545 = <0>, "+1";
+ pca9548 = <0>, "+2";
+
+ addr = <&pca9545>,"reg:0",
+ <&pca9548>,"reg:0";
+ };
+};
--- a/arch/arm/boot/dts/overlays/i2c-mux-pca9548a-overlay.dts
+++ /dev/null
@@ -1,67 +0,0 @@
-// Definitions for NXP PCA9548A I2C mux on ARM I2C bus.
-/dts-v1/;
-/plugin/;
-
-/{
- compatible = "brcm,bcm2708";
-
- fragment@0 {
- target = <&i2c_arm>;
- __overlay__ {
- #address-cells = <1>;
- #size-cells = <0>;
- status = "okay";
-
- i2cmux: mux@70 {
- compatible = "nxp,pca9548";
- reg = <0x70>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- i2c@0 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0>;
- };
- i2c@1 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <1>;
- };
- i2c@2 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <2>;
- };
- i2c@3 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <3>;
- };
- i2c@4 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <4>;
- };
- i2c@5 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <5>;
- };
- i2c@6 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <6>;
- };
- i2c@7 {
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <7>;
- };
- };
- };
- };
- __overrides__ {
- addr = <&i2cmux>,"reg:0";
- };
-};
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