linux-kernel - Re: [PATCH 3/3] ads7846: don't check penirq immediately for 7845

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Ys//fqwvh9hjP0RZ@smile.fi.intel.com>
Date:   Thu, 14 Jul 2022 14:35:26 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Luca Ellero <luca.ellero@...ckedbrain.com>
Cc:     dmitry.torokhov@...il.com, daniel@...que.org,
        m.felsch@...gutronix.de, u.kleine-koenig@...gutronix.de,
        mkl@...gutronix.de, miquel.raynal@...tlin.com, imre.deak@...ia.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luca Ellero <l.ellero@...m.it>
Subject: Re: [PATCH 3/3] ads7846: don't check penirq immediately for 7845

On Thu, Jul 14, 2022 at 10:43:19AM +0200, Luca Ellero wrote:
> From: Luca Ellero <l.ellero@...m.it>
> 
> To discard false readings, one should use "ti,penirq-recheck-delay-usecs".
> Checking get_pendown_state() at the beginning, most of the time fails
> causing malfunctioning.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Signed-off-by: Luca Ellero <l.ellero@...m.it>
> ---
>  drivers/input/touchscreen/ads7846.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
> index 9e15cdf6faa0..122d3a13b7c5 100644
> --- a/drivers/input/touchscreen/ads7846.c
> +++ b/drivers/input/touchscreen/ads7846.c
> @@ -843,14 +843,8 @@ static void ads7846_report_state(struct ads7846 *ts)
>  	if (x == MAX_12BIT)
>  		x = 0;
>  
> -	if (ts->model == 7843) {
> +	if (ts->model == 7843 || ts->model == 7845) {
>  		Rt = ts->pressure_max / 2;
> -	} else if (ts->model == 7845) {
> -		if (get_pendown_state(ts))
> -			Rt = ts->pressure_max / 2;
> -		else
> -			Rt = 0;
> -		dev_vdbg(&ts->spi->dev, "x/y: %d/%d, PD %d\n", x, y, Rt);
>  	} else if (likely(x && z1)) {
>  		/* compute touch pressure resistance using equation #2 */
>  		Rt = z2;
> -- 
> 2.25.1
> 

-- 
With Best Regards,
Andy Shevchenko