[PATCH v4 2/8] at91: pinctrl: don't request GPIOs used for interrupts but lock them as IRQ

[jjhiblot@traphandler.com (Jean-Jacques Hiblot)]

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 <jjhiblot@traphandler.com>
---
 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;
 
-- 
1.8.5.3