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30 lines
1.0 KiB
Diff
30 lines
1.0 KiB
Diff
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From ae10c15867d9a5b85eefaf11333bd30473af4b2b Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Sat, 2 May 2020 13:43:06 +0100
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Subject: [PATCH] overlays: gpio-keys: Avoid open-drain warnings
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The i2c-gpio driver expects to use a GPIO in open-drain mode. Failure
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to configure it in that way causes alarming warnings in the kernel log.
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The BCM283x and BCM2711 GPIO blocks don't support open-drain mode,
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but i2c-gpio works anyway. Silence the warning by declaring that
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open-drain mode has been enabled by other means.
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See: https://github.com/raspberrypi/firmware/issues/1381
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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/i2c-gpio-overlay.dts | 2 ++
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1 file changed, 2 insertions(+)
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--- a/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts
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@@ -16,6 +16,8 @@
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&gpio 24 0 /* scl */
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>;
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i2c-gpio,delay-us = <2>; /* ~100 kHz */
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+ i2c-gpio,sda-open-drain;
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+ i2c-gpio,scl-open-drain;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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