diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-omap.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 5e667ff91dc3..3a0c1606f885 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; } |