From e40c7f75c9bc81a19c3f927769e42fd974fccaa2 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 2 Jul 2018 23:57:42 -0700 Subject: ARM: dts: omap4-droid4: Use software debounce for gpio-keys The default value of 5ms will use GPIO hardware based debounce clocks that will keep L4PER from idling consuming about extra 30mW. Use a value of 10ms that is above the hardware debounce maximum of 7.95ms forcing software based debouncing. This allows droid4 to enter PER retention during idle as long as UARTs are idled and USB modules unloaded or unbound. Note that there seems to be a pending issue with having droid 4 enter core retention during idle where GPIO bank 1 needs to be reset late after init for some reason to not block core retention. In addition to that, we are also missing GPIO related PM runtime calls for omap4 that will be posted separately. Cc: Marcel Partap Cc: Merlijn Wajer Cc: Michael Scott Cc: NeKit Cc: Pavel Machek Cc: Sebastian Reichel Signed-off-by: Tony Lindgren --- arch/arm/boot/dts/omap4-droid4-xt894.dts | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/arm/boot/dts/omap4-droid4-xt894.dts') diff --git a/arch/arm/boot/dts/omap4-droid4-xt894.dts b/arch/arm/boot/dts/omap4-droid4-xt894.dts index 4f00559015a4..63105ca92e9c 100644 --- a/arch/arm/boot/dts/omap4-droid4-xt894.dts +++ b/arch/arm/boot/dts/omap4-droid4-xt894.dts @@ -128,6 +128,8 @@ gpios = <&gpio5 26 GPIO_ACTIVE_LOW>; /* gpio154 */ linux,code = ; linux,can-disable; + /* Value above 7.95ms for no GPIO hardware debounce */ + debounce-interval = <10>; }; slider { @@ -136,7 +138,8 @@ linux,input-type = ; linux,code = ; linux,can-disable; - + /* Value above 7.95ms for no GPIO hardware debounce */ + debounce-interval = <10>; }; }; -- cgit