| Message ID | 1461074628-20224-1-git-send-email-ludovic.desroches@atmel.com |
|---|---|
| State | New |
| Headers | show |
On 19/04/2016 at 16:03:45 +0200, Ludovic Desroches wrote : > 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 Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> > --- > 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) > -- > 2.5.0 >
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) >
On Tue, Apr 19, 2016 at 4:03 PM, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: > 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 Patch applied for fixes with the ACKs. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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)
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 --- drivers/pinctrl/pinctrl-at91-pio4.c | 2 ++ 1 file changed, 2 insertions(+)