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47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From 9fa750db2d682fa2c124dae609d05d15f93a5e52 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 4 Feb 2020 15:22:55 +0000
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Subject: [PATCH] overlays: Fix mcp23017's addr parameter
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The addr parameter of the mcp23017 overlay was broken by the addition
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of the noints parameter; splitting the mcp node in two without also
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modifying the second half from the addr parameter would cause the two
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halves to separate. Change the implementation strategy to patch
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fragment 2 (as was originally proposed). This will prevent the
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overlay from being applied at runtime until the "dtoverlay" command
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is improved, but the overlay already has this restriction due to
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fragment 3 so this isn't a step backwards.
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See: https://github.com/raspberrypi/linux/issues/3449
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 16 +++++++---------
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1 file changed, 7 insertions(+), 9 deletions(-)
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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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@@ -48,15 +48,13 @@
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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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+ target = <&mcp23017>;
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+ mcp23017_irq: __overlay__ {
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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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