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gpio: lynxpoint: Use for_each_set_bit() in IRQ handler 

This simplifies and standardizes the AB IRQ handler by using
the for_each_set_bit() library function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
hifive-unleashed-5.1
Andy Shevchenko 2018-11-06 14:38:55 +02:00
parent 226e6b866d
commit 502ae42ca6
1 changed files with 7 additions and 5 deletions
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12
drivers/gpio/gpio-lynxpoint.c
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@ -240,21 +240,23 @@ static void lp_gpio_irq_handler(struct irq_desc *desc)
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct lp_gpio *lg = gpiochip_get_data(gc);
struct irq_chip *chip = irq_data_get_irq_chip(data);
u32 base, pin, mask;
unsigned long reg, ena, pending;
u32 base, pin;
/* check from GPIO controller which pin triggered the interrupt */
for (base = 0; base < lg->chip.ngpio; base += 32) {
reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
ena = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
while ((pending = (inl(reg) & inl(ena)))) {
/* Only interrupts that are enabled */
pending = inl(reg) & inl(ena);
for_each_set_bit(pin, &pending, 32) {
unsigned irq;
pin = __ffs(pending);
mask = BIT(pin);
/* Clear before handling so we don't lose an edge */
outl(mask, reg);
outl(BIT(pin), reg);
irq = irq_find_mapping(lg->chip.irq.domain, base + pin);
generic_handle_irq(irq);
}