1 From c85a1ccbc6b1cab51a5fe5b916bcaf40bcd9096c Mon Sep 17 00:00:00 2001
2 From: Phil Elwell <phil@raspberrypi.org>
3 Date: Mon, 21 Jan 2019 12:19:57 +0000
4 Subject: [PATCH] overlays: mcp23017: Support the MCP23008
6 Add an 'mcp23008' parameter to enable support for the MCP23008 device.
8 See: https://github.com/raspberrypi/linux/issues/2818
10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
12 arch/arm/boot/dts/overlays/README | 2 ++
13 arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 10 +++++++++-
14 2 files changed, 11 insertions(+), 1 deletion(-)
16 --- a/arch/arm/boot/dts/overlays/README
17 +++ b/arch/arm/boot/dts/overlays/README
18 @@ -1212,6 +1212,8 @@ Params: gpiopin Gpio pin
20 addr I2C address of the MCP23017 (default: 0x20)
22 + mcp23008 Configure an MCP23008 instead.
26 Info: Configures the MCP23S08/17 SPI GPIO expanders.
27 --- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
28 +++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
36 + target = <&mcp23017>;
38 + compatible = "microchip,mcp23008";
43 gpiopin = <&mcp23017_pins>,"brcm,pins:0",
44 <&mcp23017>,"interrupts:0";
45 addr = <&mcp23017>,"reg:0";
46 + mcp23008 = <0>,"=3";