Thread (22 messages) 22 messages, 5 authors, 2014-03-17

[PATCH v5 3/9] at91: pinctrl: don't request GPIOs used for interrupts but lock them as IRQ

From: Jean-Jacques Hiblot <hidden>
Date: 2014-03-17 11:15:07
Also in: linux-devicetree, lkml

Hi Boris,

Sorry for being late, I was on vacation.
Yes this patch can be dropped from the serie.

2014-03-12 13:59 GMT+01:00 Boris BREZILLON [off-list ref]:
Hi JJ,

IIRC this patch was necessary for the DM9000 device, which is not defined
in this series anymore.
And, correct me if I'm wrong, but there's still a discussion about how
this should be fixed properly (https://lkml.org/lkml/2014/2/25/388).

As a result, shouldn't we remove this patch from this series ?

Best Regards,

Boris

Le 03/03/2014 11:05, Jean-Jacques Hiblot a ?crit :
quoted
During the xlate stage of the DT interrupt parsing, the at91 pinctrl
driver
requests the GPIOs that are described as interrupt sources. This prevents
a
driver to request the gpio later to get its electrical value.
This patch replaces the gpio_request with a gpio_lock_as_irq to prevent
the
gpio to be set as an ouput while allowing a subsequent gpio_request to
succeed

Signed-off-by: Jean-Jacques Hiblot <redacted>
---
  drivers/pinctrl/pinctrl-at91.c | 5 ++---
  1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-at91.c
b/drivers/pinctrl/pinctrl-at91.c
index d990e33..db55b96 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1478,18 +1478,17 @@ static int at91_gpio_irq_domain_xlate(struct
irq_domain *d,
  {
        struct at91_gpio_chip *at91_gpio = d->host_data;
        int ret;
-       int pin = at91_gpio->chip.base + intspec[0];
        if (WARN_ON(intsize < 2))
                return -EINVAL;
        *out_hwirq = intspec[0];
        *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
  -     ret = gpio_request(pin, ctrlr->full_name);
+       ret = gpio_lock_as_irq(&at91_gpio->chip, intspec[0]);
        if (ret)
                return ret;
  -     ret = gpio_direction_input(pin);
+       ret = at91_gpio_direction_input(&at91_gpio->chip, intspec[0]);
        if (ret)
                return ret;
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