lkml.org 
[lkml]   [2016]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] pinctrl: at91-pio4: fix pull-up/down logic
From
Date
Le 19/04/2016 16:03, Ludovic Desroches a écrit :
> The default configuration of a pin is often with a value in the
> pull-up/down field at chip reset. So, even if the internal logic of the
> controller prevents writing a configuration with pull-up and pull-down at
> the same time, we must ensure explicitly this condition before writing the
> register.
>
> This was leading to a pull-down condition not taken into account for
> instance.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> Fixes: 776180848b57 ("pinctrl: introduce driver for Atmel PIO4 controller")
> Cc: stable@vger.kernel.org #v4.4 and later

Yes, and I can add:
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

and more important:
On a sama5d2 Xplained board:
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, bye.

> ---
> drivers/pinctrl/pinctrl-at91-pio4.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
> index 629b6fe..75093d7 100644
> --- a/drivers/pinctrl/pinctrl-at91-pio4.c
> +++ b/drivers/pinctrl/pinctrl-at91-pio4.c
> @@ -722,9 +722,11 @@ static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
> break;
> case PIN_CONFIG_BIAS_PULL_UP:
> conf |= ATMEL_PIO_PUEN_MASK;
> + conf &= (~ATMEL_PIO_PDEN_MASK);
> break;
> case PIN_CONFIG_BIAS_PULL_DOWN:
> conf |= ATMEL_PIO_PDEN_MASK;
> + conf &= (~ATMEL_PIO_PUEN_MASK);
> break;
> case PIN_CONFIG_DRIVE_OPEN_DRAIN:
> if (arg == 0)
>


--
Nicolas Ferre

\
 
 \ /
  Last update: 2016-04-19 17:41    [W:0.037 / U:23.992 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site