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- From 58c72d20f05a5943b48d834e8388a58332897ed8 Mon Sep 17 00:00:00 2001
- From: Michael Kaplan <m.kaplan@evva.com>
- Date: Tue, 24 May 2016 10:19:08 +0200
- Subject: [PATCH] Added Overlay for Microchip MCP23017 I2C gpio expander
- ---
- arch/arm/boot/dts/overlays/README | 9 +++++
- arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 54 +++++++++++++++++++++++++
- 2 files changed, 63 insertions(+)
- create mode 100644 arch/arm/boot/dts/overlays/mcp23017-overlay.dts
- --- a/arch/arm/boot/dts/overlays/README
- +++ b/arch/arm/boot/dts/overlays/README
- @@ -567,6 +567,15 @@ Params: gpio_out_pin GPIO for
- (default "off")
-
-
- +Name: mcp23017
- +Info: Configures the MCP23017 I2C port expander
- +Load: dtoverlay=mcp23017,<param>=<val>
- +Params: gpiopin Gpio pin connected to the INTA output of the
- + MCP23017 (default: 4)
- +
- + addr I2C address of the MCP23017 (default: 0x20)
- +
- +
- Name: mcp2515-can0
- Info: Configures the MCP2515 CAN controller on spi0.0
- Load: dtoverlay=mcp2515-can0,<param>=<val>
- --- /dev/null
- +++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
- @@ -0,0 +1,54 @@
- +// Definitions for MCP23017 Gpio Extender from Microchip Semiconductor
- +
- +/dts-v1/;
- +/plugin/;
- +
- +/ {
- + compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
- +
- + fragment@0 {
- + target = <&i2c1>;
- + __overlay__ {
- + status = "okay";
- + };
- + };
- +
- + fragment@1 {
- + target = <&gpio>;
- + __overlay__ {
- + mcp23017_pins: mcp23017_pins {
- + brcm,pins = <4>;
- + brcm,function = <0>;
- + };
- + };
- + };
- +
- + fragment@2 {
- + target = <&i2c1>;
- + __overlay__ {
- + #address-cells = <1>;
- + #size-cells = <0>;
- +
- + mcp23017: mcp@20 {
- + compatible = "microchip,mcp23017";
- + reg = <0x20>;
- + gpio-controller;
- + #gpio-cells = <2>;
- + #interrupt-cells=<2>;
- + interrupt-parent = <&gpio>;
- + interrupts = <4 2>;
- + interrupt-controller;
- + microchip,irq-mirror;
- +
- + status = "okay";
- + };
- + };
- + };
- +
- + __overrides__ {
- + gpiopin = <&mcp23017_pins>,"brcm,pins:0",
- + <&mcp23017>,"interrupts:0";
- + addr = <&mcp23017>,"reg:0";
- + };
- +};
- +
|
