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20402106a3
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
270 lines
5.9 KiB
Diff
270 lines
5.9 KiB
Diff
From 347b13e71792301011d09442c6150d6aec8d89e0 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 11 May 2016 15:38:04 +0100
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Subject: [PATCH 342/423] BCM270X_DT: Add umbrella I2C Mux overlay i2c-mux
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This overlay supports a range of I2C multiplexers - PCA9542 (2 ports),
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PCA9545 (4 ports) and PCA9548 (8 ports).
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Also remove the dedicated i2c-mux-9548a overlays since it is no longer
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needed.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/Makefile | 2 +-
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arch/arm/boot/dts/overlays/README | 17 ++-
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arch/arm/boot/dts/overlays/i2c-mux-overlay.dts | 138 +++++++++++++++++++++
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.../boot/dts/overlays/i2c-mux-pca9548a-overlay.dts | 67 ----------
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4 files changed, 152 insertions(+), 72 deletions(-)
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create mode 100644 arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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delete mode 100644 arch/arm/boot/dts/overlays/i2c-mux-pca9548a-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -34,7 +34,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hy28a.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
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-dtbo-$(RPI_DT_OVERLAYS) += i2c-mux-pca9548a.dtbo
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+dtbo-$(RPI_DT_OVERLAYS) += i2c-mux.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -421,10 +421,19 @@ Params: i2c_gpio_sda GPIO use
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(default "2" = ~100kHz)
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-Name: i2c-mux-pca9548a
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-Info: Adds support for an NXP PCA9548A I2C multiplexer on i2c_arm
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-Load: dtoverlay=i2c-mux-pca9548a,<param>=<val>
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-Params: addr I2C address of PCA9548A (default 0x70)
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+Name: i2c-mux
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+Info: Adds support for a number of I2C bus multiplexers on i2c_arm
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+Load: dtoverlay=i2c-mux,<param>=<val>
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+Params: pca9542 Select the NXP PCA9542 device
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+
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+ pca9545 Select the NXP PCA9545 device
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+
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+ pca9548 Select the NXP PCA9548 device
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+
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+ addr Change I2C address of the device (default 0x70)
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+
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+
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+[ The i2c-mux-pca9548a overlay has been deleted. See i2c-mux. ]
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Name: i2c-pwm-pca9685a
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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@@ -0,0 +1,138 @@
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+// Umbrella I2C Mux overlay
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+
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+/dts-v1/;
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+/plugin/;
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+
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+/{
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&i2c_arm>;
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+ __dormant__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ pca9542: mux@70 {
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+ compatible = "nxp,pca9542";
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+ reg = <0x70>;
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ i2c@0 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <0>;
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+ };
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+ i2c@1 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <1>;
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+ };
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+ };
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&i2c_arm>;
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+ __dormant__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ pca9545: mux@70 {
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+ compatible = "nxp,pca9545";
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+ reg = <0x70>;
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ i2c@0 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <0>;
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+ };
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+ i2c@1 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <1>;
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+ };
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+ i2c@2 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <2>;
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+ };
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+ i2c@3 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <3>;
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+ };
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+ };
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&i2c_arm>;
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+ __dormant__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ pca9548: mux@70 {
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+ compatible = "nxp,pca9548";
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+ reg = <0x70>;
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ i2c@0 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <0>;
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+ };
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+ i2c@1 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <1>;
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+ };
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+ i2c@2 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <2>;
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+ };
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+ i2c@3 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <3>;
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+ };
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+ i2c@4 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <4>;
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+ };
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+ i2c@5 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <5>;
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+ };
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+ i2c@6 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <6>;
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+ };
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+ i2c@7 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ reg = <7>;
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+ };
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ pca9542 = <0>, "+0";
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+ pca9545 = <0>, "+1";
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+ pca9548 = <0>, "+2";
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+
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+ addr = <&pca9545>,"reg:0",
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+ <&pca9548>,"reg:0";
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+ };
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+};
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--- a/arch/arm/boot/dts/overlays/i2c-mux-pca9548a-overlay.dts
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+++ /dev/null
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@@ -1,67 +0,0 @@
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-// Definitions for NXP PCA9548A I2C mux on ARM I2C bus.
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-/dts-v1/;
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-/plugin/;
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-
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-/{
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- compatible = "brcm,bcm2708";
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-
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- fragment@0 {
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- target = <&i2c_arm>;
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- __overlay__ {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- status = "okay";
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-
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- i2cmux: mux@70 {
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- compatible = "nxp,pca9548";
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- reg = <0x70>;
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- #address-cells = <1>;
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- #size-cells = <0>;
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-
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- i2c@0 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <0>;
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- };
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- i2c@1 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <1>;
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- };
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- i2c@2 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <2>;
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- };
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- i2c@3 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <3>;
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- };
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- i2c@4 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <4>;
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- };
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- i2c@5 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <5>;
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- };
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- i2c@6 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <6>;
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- };
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- i2c@7 {
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- #address-cells = <1>;
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- #size-cells = <0>;
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- reg = <7>;
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- };
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- };
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- };
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- };
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- __overrides__ {
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- addr = <&i2cmux>,"reg:0";
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- };
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-};
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