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-rw-r--r--target/linux/brcm2708/patches-4.4/0341-BCM270X_DT-Add-umbrella-I2C-Mux-overlay-i2c-mux.patch269
1 files changed, 269 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0341-BCM270X_DT-Add-umbrella-I2C-Mux-overlay-i2c-mux.patch b/target/linux/brcm2708/patches-4.4/0341-BCM270X_DT-Add-umbrella-I2C-Mux-overlay-i2c-mux.patch
new file mode 100644
index 0000000000..363f0c8f07
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0341-BCM270X_DT-Add-umbrella-I2C-Mux-overlay-i2c-mux.patch
@@ -0,0 +1,269 @@
+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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