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Commit 68491b07 authored by Linus Walleij's avatar Linus Walleij
Browse files

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: default avatarAlexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 51ba88e3

drivers/gpio/gpio-ep93xx.c

+10 −14
Original line number Diff line number Diff line
@@ -105,26 +105,22 @@ 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;

	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;

	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);

}