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49 lines
1.7 KiB
Diff
49 lines
1.7 KiB
Diff
From 499e28e3a38f0de843b07bf4bbf7692b07c5e3ba Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 7 Oct 2019 13:51:07 +0100
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Subject: [PATCH] overlays: gpio-shutdown: Add debounce parameter
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Give the gpio-shutdown overlay a debounce parameter that requires
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the GPIO to be held at the relevant level for a specified number
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of milliseconds. The default value is 100 - higher than the driver
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default of 5ms to avoid unfortunate glitches.
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See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=253680
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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 | 3 +++
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arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts | 2 ++
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2 files changed, 5 insertions(+)
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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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@@ -803,6 +803,9 @@ Params: gpio_pin GPIO pin
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Note that the default pin (GPIO3) has an
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external pullup.
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+ debounce Specify the debounce interval in milliseconds
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+ (default 100)
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+
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Name: hd44780-lcd
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Info: Configures an HD44780 compatible LCD display. Uses 4 gpio pins for
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--- a/arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts
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@@ -53,6 +53,7 @@
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label = "shutdown";
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linux,code = <116>; // KEY_POWER
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gpios = <&gpio 3 1>;
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+ debounce-interval = <100>; // ms
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};
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};
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};
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@@ -75,6 +76,7 @@
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// Allow setting the active_low flag. 0 = active high, 1 = active low
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active_low = <&button>,"gpios:8";
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+ debounce = <&button>,"debounce-interval:0";
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};
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};
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