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67 lines
1.8 KiB
Diff
67 lines
1.8 KiB
Diff
From b37ac8c50684c3517fb9c6f737e7ea444a7d7405 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Thu, 5 Sep 2019 17:41:46 +0100
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Subject: [PATCH 792/806] overlays: mcp23017: Add option for not connecting the
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int GPIO
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The interrupt GPIO is optional to the driver, therefore add an
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option to not configure it.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/README | 1 +
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.../boot/dts/overlays/mcp23017-overlay.dts | 21 +++++++++++++------
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2 files changed, 16 insertions(+), 6 deletions(-)
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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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@@ -1427,6 +1427,7 @@ 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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+ noints Disable the interrupt GPIO line.
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Name: mcp23s17
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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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@@ -34,11 +34,6 @@
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reg = <0x20>;
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gpio-controller;
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#gpio-cells = <2>;
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- #interrupt-cells=<2>;
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- interrupt-parent = <&gpio>;
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- interrupts = <4 2>;
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- interrupt-controller;
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- microchip,irq-mirror;
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status = "okay";
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};
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@@ -52,11 +47,25 @@
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};
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};
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+ fragment@4 {
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+ target = <&i2c1>;
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+ __overlay__ {
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+ mcp23017_irq: mcp@20 {
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+ #interrupt-cells=<2>;
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+ interrupt-parent = <&gpio>;
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+ interrupts = <4 2>;
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+ interrupt-controller;
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+ microchip,irq-mirror;
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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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gpiopin = <&mcp23017_pins>,"brcm,pins:0",
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- <&mcp23017>,"interrupts:0";
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+ <&mcp23017_irq>,"interrupts:0";
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addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0";
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mcp23008 = <0>,"=3";
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+ noints = <0>,"!1!4";
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};
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};
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