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gpio: pl061: 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: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2013-11-26 12:33:41 +01:00
parent 7808755d4b
commit f6f293112e
1 changed files with 22 additions and 0 deletions
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22
drivers/gpio/gpio-pl061.c
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@ -231,11 +231,33 @@ static void pl061_irq_unmask(struct irq_data *d)
spin_unlock(&chip->lock);
}
static unsigned int pl061_irq_startup(struct irq_data *d)
{
struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
if (gpio_lock_as_irq(&chip->gc, irqd_to_hwirq(d)))
dev_err(chip->gc.dev,
"unable to lock HW IRQ %lu for IRQ\n",
irqd_to_hwirq(d));
pl061_irq_unmask(d);
return 0;
}
static void pl061_irq_shutdown(struct irq_data *d)
{
struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
pl061_irq_mask(d);
gpio_unlock_as_irq(&chip->gc, irqd_to_hwirq(d));
}
static struct irq_chip pl061_irqchip = {
.name = "pl061 gpio",
.irq_mask = pl061_irq_mask,
.irq_unmask = pl061_irq_unmask,
.irq_set_type = pl061_irq_type,
.irq_startup = pl061_irq_startup,
.irq_shutdown = pl061_irq_shutdown,
};
static int pl061_irq_map(struct irq_domain *d, unsigned int irq,