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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0214-Add-configs-and-overlay-for-PCA9548-I2C-mux.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0214-Add-configs-and-overlay-for-PCA9548-I2C-mux.patch133
1 files changed, 133 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0214-Add-configs-and-overlay-for-PCA9548-I2C-mux.patch b/target/linux/brcm2708/patches-4.4/0214-Add-configs-and-overlay-for-PCA9548-I2C-mux.patch
new file mode 100644
index 0000000000..cb41cceee4
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0214-Add-configs-and-overlay-for-PCA9548-I2C-mux.patch
@@ -0,0 +1,133 @@
+From 09e64d48934eb812bab8667dcce81d0387092644 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <6by9@users.noreply.github.com>
+Date: Thu, 17 Mar 2016 18:16:16 +0000
+Subject: [PATCH 214/232] Add configs and overlay for PCA9548 I2C mux
+
+Adds kernel configs for I2C muxes and a dt overlay for PCA9548
+that adds the 8 muxed I2C buses and mux device.
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 6 ++
+ .../boot/dts/overlays/i2c-mux-pca9548a-overlay.dts | 67 ++++++++++++++++++++++
+ arch/arm/configs/bcm2709_defconfig | 2 +
+ arch/arm/configs/bcmrpi_defconfig | 2 +
+ 5 files changed, 78 insertions(+)
+ create 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
+@@ -29,6 +29,7 @@ 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) += i2c0-bcm2708.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += i2s-mmap.dtbo
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -360,6 +360,12 @@ 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-rtc
+ Info: Adds support for a number of I2C Real Time Clock devices
+ Load: dtoverlay=i2c-rtc,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/i2c-mux-pca9548a-overlay.dts
+@@ -0,0 +1,67 @@
++// 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";
++ };
++};
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -600,6 +600,8 @@ CONFIG_I2C=y
+ CONFIG_I2C_CHARDEV=m
+ CONFIG_I2C_BCM2708=m
+ CONFIG_I2C_GPIO=m
++CONFIG_I2C_MUX=m
++CONFIG_I2C_MUX_PCA954x=m
+ CONFIG_SPI=y
+ CONFIG_SPI_BCM2835=m
+ CONFIG_SPI_BCM2835AUX=m
+--- a/arch/arm/configs/bcmrpi_defconfig
++++ b/arch/arm/configs/bcmrpi_defconfig
+@@ -593,6 +593,8 @@ CONFIG_I2C=y
+ CONFIG_I2C_CHARDEV=m
+ CONFIG_I2C_BCM2708=m
+ CONFIG_I2C_GPIO=m
++CONFIG_I2C_MUX=m
++CONFIG_I2C_MUX_PCA954x=m
+ CONFIG_SPI=y
+ CONFIG_SPI_BCM2835=m
+ CONFIG_SPI_BCM2835AUX=m