linux-kernel - Re: [PATCH 0/2] Input: st1232: wakeup in Suspend to idle

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Date:   Wed, 10 May 2023 10:42:14 +0200
From:   Javier Carrasco <javier.carrasco@...fvision.net>
To:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Uwe Kleine-g <u.kleine-koenig@...gutronix.de>,
        Michael Riesch <michael.riesch@...fvision.net>
Subject: Re: [PATCH 0/2] Input: st1232: wakeup in Suspend to idle

Gentle ping.

On 03.04.23 14:47, Javier Carrasco wrote:
> The st1232 touchscreen provides an interrupt line that can be configured
> as a wakeup source, and currently it is possible to use this mechanism in
> "Suspend to RAM" and "Hibernate" power states. 
> 
> Unfortunately, that does not work in "Suspend to idle" (freeze) because
> the device driver disables the interrupts in its suspend callback.
> Given that the interrupt handling prior to entering the mentioned power
> state modes is managed by the power subsystem, the irq enabling/disabling
> can be removed from the touchscreen driver, allowing the device to work
> as a wakeup source in "Suspend to idle".
> 
> Given that the st1232 device driver does not reflect its wakeup events
> in sysfs, this series also adds pm_wakeup_event to the interrupt
> handler.
> 
> These changes have been successfully tested with an ST1624-N32C and a
> Rockchip-based platform.
> 
> Javier Carrasco (2):
>   Input: st1232 - remove enable/disable irq in resume/suspend callbacks
>   Input: st1232 - add wake up event counting
> 
>  drivers/input/touchscreen/st1232.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)
>