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gpio: lynxpoint: 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: Mathias Nyman <mathias.nyman@linux.intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Linus Walleij 2013-11-20 15:36:53 +01:00
parent aa6baa7e37
commit eb7cce1ea9
1 changed files with 22 additions and 0 deletions
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22
drivers/gpio/gpio-lynxpoint.c
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@ -301,6 +301,26 @@ static void lp_irq_disable(struct irq_data *d)
spin_unlock_irqrestore(&lg->lock, flags);
}
static unsigned int lp_irq_startup(struct irq_data *d)
{
struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d)))
dev_err(lg->chip.dev,
"unable to lock HW IRQ %lu for IRQ\n",
irqd_to_hwirq(d));
lp_irq_enable(d);
return 0;
}
static void lp_irq_shutdown(struct irq_data *d)
{
struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
lp_irq_disable(d);
gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d));
}
static struct irq_chip lp_irqchip = {
.name = "LP-GPIO",
.irq_mask = lp_irq_mask,
@ -308,6 +328,8 @@ static struct irq_chip lp_irqchip = {
.irq_enable = lp_irq_enable,
.irq_disable = lp_irq_disable,
.irq_set_type = lp_irq_type,
.irq_startup = lp_irq_startup,
.irq_shutdown = lp_irq_shutdown,
.flags = IRQCHIP_SKIP_SET_WAKE,
};