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| author | Linus Walleij <linus.walleij@linaro.org> | 2013-11-19 14:14:50 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-12-04 14:46:35 +0100 |
| commit | db6b3ad1772e0e0e82c52d6337378e79da2effad (patch) | |
| tree | d0b9830f72d53f016cbbed0eb258f5bfddab15a1 /drivers/gpio/gpio-bcm-kona.c | |
| parent | f41cd3c2876bd31e7c71908548ae3c7a5b7ff649 (diff) | |
| download | linux-db6b3ad1772e0e0e82c52d6337378e79da2effad.tar.gz linux-db6b3ad1772e0e0e82c52d6337378e79da2effad.tar.bz2 linux-db6b3ad1772e0e0e82c52d6337378e79da2effad.zip | |
gpio: bcm-kona: lock IRQs when starting them
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>
Diffstat (limited to 'drivers/gpio/gpio-bcm-kona.c')
| -rw-r--r-- | drivers/gpio/gpio-bcm-kona.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c index 72c927dc3be1..3437414eaef2 100644 --- a/drivers/gpio/gpio-bcm-kona.c +++ b/drivers/gpio/gpio-bcm-kona.c @@ -449,12 +449,34 @@ static void bcm_kona_gpio_irq_handler(unsigned int irq, struct irq_desc *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 = { .name = "bcm-kona-gpio", .irq_ack = bcm_kona_gpio_irq_ack, .irq_mask = bcm_kona_gpio_irq_mask, .irq_unmask = bcm_kona_gpio_irq_unmask, .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[] = { |