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gpio: bcm-kona: lock IRQs when starting them

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This uses the new API for tagging GPIO lines as in use by
IRQs. This enforces a few semantic checks on how the underlying
GPIO line is used.

Cc: Christian Daudt <csd@broadcom.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Tested-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2013-11-19 14:14:50 +01:00
parent f41cd3c287
commit db6b3ad177
1 changed files with 22 additions and 0 deletions
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22
drivers/gpio/gpio-bcm-kona.c
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@ -449,12 +449,34 @@ static void bcm_kona_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
chained_irq_exit(chip, desc); chained_irq_exit(chip, desc);
} }
static unsigned int bcm_kona_gpio_irq_startup(struct irq_data *d)
{
struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d);
if (gpio_lock_as_irq(&kona_gpio->gpio_chip, d->hwirq))
dev_err(kona_gpio->gpio_chip.dev,
"unable to lock HW IRQ %lu for IRQ\n",
d->hwirq);
bcm_kona_gpio_irq_unmask(d);
return 0;
}
static void bcm_kona_gpio_irq_shutdown(struct irq_data *d)
{
struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d);
bcm_kona_gpio_irq_mask(d);
gpio_unlock_as_irq(&kona_gpio->gpio_chip, d->hwirq);
}
static struct irq_chip bcm_gpio_irq_chip = { static struct irq_chip bcm_gpio_irq_chip = {
.name = "bcm-kona-gpio", .name = "bcm-kona-gpio",
.irq_ack = bcm_kona_gpio_irq_ack, .irq_ack = bcm_kona_gpio_irq_ack,
.irq_mask = bcm_kona_gpio_irq_mask, .irq_mask = bcm_kona_gpio_irq_mask,
.irq_unmask = bcm_kona_gpio_irq_unmask, .irq_unmask = bcm_kona_gpio_irq_unmask,
.irq_set_type = bcm_kona_gpio_irq_set_type, .irq_set_type = bcm_kona_gpio_irq_set_type,
.irq_startup = bcm_kona_gpio_irq_startup,
.irq_shutdown = bcm_kona_gpio_irq_shutdown,
}; };
static struct __initconst of_device_id bcm_kona_gpio_of_match[] = { static struct __initconst of_device_id bcm_kona_gpio_of_match[] = {