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gpio: idt3243x: Convert to immutable irq_chip

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Convert the driver to immutable irq-chip with a bit of
intuition.

Cc: Marc Zyngier <maz@kernel.org>
Tested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Linus Walleij 2023-03-09 08:45:58 +01:00 committed by Bartosz Golaszewski
parent ab42f021bc
commit 9cd9e23ae3
1 changed files with 8 additions and 3 deletions
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11
drivers/gpio/gpio-idt3243x.c
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@ -92,6 +92,8 @@ static void idt_gpio_mask(struct irq_data *d)
writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);
raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);
gpiochip_disable_irq(gc, irqd_to_hwirq(d));
}
static void idt_gpio_unmask(struct irq_data *d)
@ -100,6 +102,7 @@ static void idt_gpio_unmask(struct irq_data *d)
struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);
unsigned long flags;
gpiochip_enable_irq(gc, irqd_to_hwirq(d));
raw_spin_lock_irqsave(&gc->bgpio_lock, flags);
ctrl->mask_cache &= ~BIT(d->hwirq);
@ -119,12 +122,14 @@ static int idt_gpio_irq_init_hw(struct gpio_chip *gc)
return 0;
}
static struct irq_chip idt_gpio_irqchip = {
static const struct irq_chip idt_gpio_irqchip = {
.name = "IDTGPIO",
.irq_mask = idt_gpio_mask,
.irq_ack = idt_gpio_ack,
.irq_unmask = idt_gpio_unmask,
.irq_set_type = idt_gpio_irq_set_type
.irq_set_type = idt_gpio_irq_set_type,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int idt_gpio_probe(struct platform_device *pdev)
@ -168,7 +173,7 @@ static int idt_gpio_probe(struct platform_device *pdev)
return parent_irq;
girq = &ctrl->gc.irq;
girq->chip = &idt_gpio_irqchip;
gpio_irq_chip_set_chip(girq, &idt_gpio_irqchip);
girq->init_hw = idt_gpio_irq_init_hw;
girq->parent_handler = idt_gpio_dispatch;
girq->num_parents = 1;