linux-kernel - Re: [PATCH v3 04/11] Input: ilitek_ts_i2c: fix warning with gpio controllers that sleep

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Message-ID: <rifyic7w2zyjupbmzwcewcslryqiyexxdvbgcuxtkw3trmtulw@y4otarfyvgm7>
Date: Tue, 18 Nov 2025 11:22:32 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Josua Mayer <josua@...id-run.com>
Cc: Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Shawn Guo <shawnguo@...nel.org>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Jessica Zhang <jessica.zhang@....qualcomm.com>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, 
	Fabio Estevam <festevam@...il.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, Thierry Reding <thierry.reding@...il.com>, 
	Jon Nettleton <jon@...id-run.com>, Mikhail Anikin <mikhail.anikin@...id-run.com>, 
	Yazan Shhady <yazan.shhady@...id-run.com>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, linux-input@...r.kernel.org, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 04/11] Input: ilitek_ts_i2c: fix warning with gpio
 controllers that sleep

Hi Josua,

On Mon, Nov 17, 2025 at 01:28:46PM +0100, Josua Mayer wrote:
> The ilitek touchscreen driver uses the non-sleeping gpiod_set_value
> function for reset.
> 
> Switch to using gpiod_set_value_cansleep() when controlling reset_gpio to
> support GPIO providers that may sleep, such as I2C GPIO expanders.
> 
> This fixes noisy complaints in kernel log for gpio providers that do
> sleep.
> 
> Signed-off-by: Josua Mayer <josua@...id-run.com>
> ---
>  drivers/input/touchscreen/ilitek_ts_i2c.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c
> index 0dd632724a003..8c5a54b336816 100644
> --- a/drivers/input/touchscreen/ilitek_ts_i2c.c
> +++ b/drivers/input/touchscreen/ilitek_ts_i2c.c
> @@ -396,9 +396,9 @@ static const struct ilitek_protocol_map ptl_func_map[] = {
>  static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
>  {
>  	if (ts->reset_gpio) {
> -		gpiod_set_value(ts->reset_gpio, 1);
> +		gpiod_set_value_cansleep(ts->reset_gpio, 1);
>  		mdelay(10);

This (and below) should be usleep_range/msleep/fsleep.

> -		gpiod_set_value(ts->reset_gpio, 0);
> +		gpiod_set_value_cansleep(ts->reset_gpio, 0);
>  		mdelay(delay);
>  	}
>  }
> 

Thanks.

-- 
Dmitry