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-rw-r--r--drivers/gpio/gpio-omap.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 5e667ff..3a0c160 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1090,6 +1090,8 @@ static int omap_gpio_irq_map(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hwirq)
{
struct gpio_bank *bank = d->host_data;
+ int gpio;
+ int ret;
if (!bank)
return -EINVAL;
@@ -1104,6 +1106,22 @@ static int omap_gpio_irq_map(struct irq_domain *d, unsigned int virq,
set_irq_flags(virq, IRQF_VALID);
}
+ /*
+ * REVISIT most GPIO IRQ chip drivers need to call
+ * gpio_request() before a GPIO line can be used as an
+ * IRQ. Ideally this should be handled by the IRQ core
+ * but until then this has to be done on a per driver
+ * basis. Remove this once this is managed by the core.
+ */
+ if (bank->chip.of_node) {
+ gpio = irq_to_gpio(bank, hwirq);
+ ret = gpio_request_one(gpio, GPIOF_IN, NULL);
+ if (ret) {
+ dev_err(bank->dev, "Could not request GPIO%d\n", gpio);
+ return ret;
+ }
+ }
+
return 0;
}