linux-kernel - Re: [PATCH v3 3/4] Input: Don't program hw debounce for soc_button

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Message-ID: <aF1aThiXUFhHxlZO@smile.fi.intel.com>
Date: Thu, 26 Jun 2025 17:33:50 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mario Limonciello <superm1@...nel.org>
Cc: Hans de Goede <hansg@...nel.org>, Mika Westerberg <westeri@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"open list:GPIO ACPI SUPPORT" <linux-gpio@...r.kernel.org>,
	"open list:GPIO ACPI SUPPORT" <linux-acpi@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:INPUT (KEYBOARD, MOUSE, JOYSTICK, TOUCHSCREEN)..." <linux-input@...r.kernel.org>,
	Mario Limonciello <mario.limonciello@....com>
Subject: Re: [PATCH v3 3/4] Input: Don't program hw debounce for
 soc_button_array devices

On Wed, Jun 25, 2025 at 04:58:12PM -0500, Mario Limonciello wrote:
> From: Mario Limonciello <mario.limonciello@....com>
> 
> Programming a hardware debounce of 50ms causes problems where a button
> doesn't work properly anymore on some systems.  This debounce is intended
> for compatibility with systems with a mechanical switch so soc_button_array
> devices should only be using a sofware debounce.
> 
> Add support for indicating that a driver is only requesting gpio_keys
> to use software debounce support and mark that in soc_button_array
> accordingly.

...

> +	gpio_keys_pdata->no_hw_debounce = TRUE;

true

-- 
With Best Regards,
Andy Shevchenko