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