linux-imx

    struct zx_gpio *chip = gpiochip_get_data(gc);

    struct irq_chip *irqchip = irq_desc_get_chip(desc);

​

    chained_irq_enter(irqchip, desc);

​

    pending = readw_relaxed(chip->base + ZX_GPIO_MIS);

    writew_relaxed(pending, chip->base + ZX_GPIO_IC);

    if (pending) {

        for_each_set_bit(offset, &pending, ZX_GPIO_NR)

                                offset));

    }

​

    chained_irq_exit(irqchip, desc);

}

​

static void zx_irq_mask(struct irq_data *d)

{

    struct gpio_chip *gc = irq_data_get_irq_chip_data(d);

    struct zx_gpio *chip = gpiochip_get_data(gc);