pinctrl: coh901: mark GPIO lines used for 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: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c
index f22a219..162ac0d 100644 (file)
--- a/drivers/pinctrl/pinctrl-coh901.c
+++ b/drivers/pinctrl/pinctrl-coh901.c
@@ -529,6 +529,10 @@ static void u300_gpio_irq_enable(struct irq_data *d)
 
        dev_dbg(gpio->dev, "enable IRQ for hwirq %lu on port %s, offset %d\n",
                 d->hwirq, port->name, offset);
+       if (gpio_lock_as_irq(&gpio->chip, d->hwirq))
+               dev_err(gpio->dev,
+                       "unable to lock HW IRQ %lu for IRQ\n",
+                       d->hwirq);
        local_irq_save(flags);
        val = readl(U300_PIN_REG(offset, ien));
        writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, ien));
@@ -547,6 +551,7 @@ static void u300_gpio_irq_disable(struct irq_data *d)
        val = readl(U300_PIN_REG(offset, ien));
        writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, ien));
        local_irq_restore(flags);
+       gpio_unlock_as_irq(&gpio->chip, d->hwirq);
 }
 
 static struct irq_chip u300_gpio_irqchip = {