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gpio: ep93xx: 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.

Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Linus Walleij 2018-08-22 22:41:09 +02:00
parent 51ba88e32f
commit 68491b075d
1 changed files with 10 additions and 14 deletions
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24
drivers/gpio/gpio-ep93xx.c
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@ -105,25 +105,21 @@ static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc)
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct ep93xx_gpio *epg = gpiochip_get_data(gc);
struct irq_chip *irqchip = irq_desc_get_chip(desc);
unsigned char status;
int i;
unsigned long stat;
int offset;
chained_irq_enter(irqchip, desc);
status = readb(epg->base + EP93XX_GPIO_A_INT_STATUS);
for (i = 0; i < 8; i++) {
if (status & (1 << i)) {
int gpio_irq = gpio_to_irq(0) + i;
generic_handle_irq(gpio_irq);
}
stat = readb(epg->base + EP93XX_GPIO_A_INT_STATUS);
for_each_set_bit(offset, &stat, 8) {
int gpio_irq = gpio_to_irq(0) + offset;
generic_handle_irq(gpio_irq);
}
status = readb(epg->base + EP93XX_GPIO_B_INT_STATUS);
for (i = 0; i < 8; i++) {
if (status & (1 << i)) {
int gpio_irq = gpio_to_irq(8) + i;
generic_handle_irq(gpio_irq);
}
stat = readb(epg->base + EP93XX_GPIO_B_INT_STATUS);
for_each_set_bit(offset, &stat, 8) {
int gpio_irq = gpio_to_irq(8) + offset;
generic_handle_irq(gpio_irq);
}
chained_irq_exit(irqchip, desc);