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50 lines
1.3 KiB
Diff
50 lines
1.3 KiB
Diff
From c85a1ccbc6b1cab51a5fe5b916bcaf40bcd9096c Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 21 Jan 2019 12:19:57 +0000
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Subject: [PATCH] overlays: mcp23017: Support the MCP23008
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Add an 'mcp23008' parameter to enable support for the MCP23008 device.
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See: https://github.com/raspberrypi/linux/issues/2818
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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/README | 2 ++
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arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 10 +++++++++-
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2 files changed, 11 insertions(+), 1 deletion(-)
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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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@@ -1212,6 +1212,8 @@ Params: gpiopin Gpio pin
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addr I2C address of the MCP23017 (default: 0x20)
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+ mcp23008 Configure an MCP23008 instead.
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+
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Name: mcp23s17
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Info: Configures the MCP23S08/17 SPI GPIO expanders.
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--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
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@@ -44,11 +44,19 @@
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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@3 {
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+ target = <&mcp23017>;
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+ __dormant__ {
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+ compatible = "microchip,mcp23008";
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+ };
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+ };
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+
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__overrides__ {
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gpiopin = <&mcp23017_pins>,"brcm,pins:0",
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<&mcp23017>,"interrupts:0";
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addr = <&mcp23017>,"reg:0";
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+ mcp23008 = <0>,"=3";
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};
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};
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