pinctrl: sunxi: 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: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 96ee6bb0fad5..9dba7afe94d6 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -541,18 +541,33 @@ static int sunxi_pinctrl_irq_request_resources(struct irq_data *d)
 {
         struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
         struct sunxi_desc_function *func;
+        int ret;
 
         func = sunxi_pinctrl_desc_find_function_by_pin(pctl,
                                         pctl->irq_array[d->hwirq], "irq");
         if (!func)
                 return -EINVAL;
 
+        ret = gpio_lock_as_irq(pctl->chip, pctl->irq_array[d->hwirq]);
+        if (ret) {
+                dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
+                        irqd_to_hwirq(d));
+                return ret;
+        }
+
         /* Change muxing to INT mode */
         sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval);
 
         return 0;
 }
 
+static void sunxi_pinctrl_irq_release_resources(struct irq_data *d)
+{
+        struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+
+        gpio_unlock_as_irq(pctl->chip, pctl->irq_array[d->hwirq]);
+}
+
 static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
 {
         struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
@@ -657,6 +672,7 @@ static struct irq_chip sunxi_pinctrl_edge_irq_chip = {
         .irq_mask       = sunxi_pinctrl_irq_mask,
         .irq_unmask     = sunxi_pinctrl_irq_unmask,
         .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+        .irq_release_resources = sunxi_pinctrl_irq_release_resources,
         .irq_set_type   = sunxi_pinctrl_irq_set_type,
         .flags          = IRQCHIP_SKIP_SET_WAKE,
 };
@@ -670,6 +686,7 @@ static struct irq_chip sunxi_pinctrl_level_irq_chip = {
         .irq_enable     = sunxi_pinctrl_irq_ack_unmask,
         .irq_disable    = sunxi_pinctrl_irq_mask,
         .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+        .irq_release_resources = sunxi_pinctrl_irq_release_resources,
         .irq_set_type   = sunxi_pinctrl_irq_set_type,
         .flags          = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_EOI_THREADED |
                           IRQCHIP_EOI_IF_HANDLED,