pinctrl: at91: use gpiolib API to mark a GPIO used as an IRQ
When an IRQ is started on a GPIO line, mark this GPIO as IRQ in
the gpiolib so we can keep track of the usage centrally.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index d990e33..71247f4 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1325,6 +1325,31 @@
return 0;
}
+static unsigned int gpio_irq_startup(struct irq_data *d)
+{
+ struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+ unsigned pin = d->hwirq;
+ int ret;
+
+ ret = gpio_lock_as_irq(&at91_gpio->chip, pin);
+ if (ret) {
+ dev_err(at91_gpio->chip.dev, "unable to lock pind %lu IRQ\n",
+ d->hwirq);
+ return ret;
+ }
+ gpio_irq_unmask(d);
+ return 0;
+}
+
+static void gpio_irq_shutdown(struct irq_data *d)
+{
+ struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+ unsigned pin = d->hwirq;
+
+ gpio_irq_mask(d);
+ gpio_unlock_as_irq(&at91_gpio->chip, pin);
+}
+
#ifdef CONFIG_PM
static u32 wakeups[MAX_GPIO_BANKS];
@@ -1399,6 +1424,8 @@
static struct irq_chip gpio_irqchip = {
.name = "GPIO",
+ .irq_startup = gpio_irq_startup,
+ .irq_shutdown = gpio_irq_shutdown,
.irq_disable = gpio_irq_mask,
.irq_mask = gpio_irq_mask,
.irq_unmask = gpio_irq_unmask,