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gpio: altera: 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>
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 08:45:49 +01:00 committed by Bartosz Golaszewski
parent b96eb88f59
commit 5cd79816d2
1 changed files with 15 additions and 10 deletions
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25
drivers/gpio/gpio-altera.c
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@ -24,14 +24,12 @@
* @interrupt_trigger : specifies the hardware configured IRQ trigger type
* (rising, falling, both, high)
* @mapped_irq : kernel mapped irq number.
* @irq_chip : IRQ chip configuration
*/
struct altera_gpio_chip {
struct of_mm_gpio_chip mmchip;
raw_spinlock_t gpio_lock;
int interrupt_trigger;
int mapped_irq;
struct irq_chip irq_chip;
};
static void altera_gpio_irq_unmask(struct irq_data *d)
@ -43,6 +41,7 @@ static void altera_gpio_irq_unmask(struct irq_data *d)
altera_gc = gpiochip_get_data(irq_data_get_irq_chip_data(d));
mm_gc = &altera_gc->mmchip;
gpiochip_enable_irq(&mm_gc->gc, irqd_to_hwirq(d));
raw_spin_lock_irqsave(&altera_gc->gpio_lock, flags);
intmask = readl(mm_gc->regs + ALTERA_GPIO_IRQ_MASK);
@ -68,6 +67,7 @@ static void altera_gpio_irq_mask(struct irq_data *d)
intmask &= ~BIT(irqd_to_hwirq(d));
writel(intmask, mm_gc->regs + ALTERA_GPIO_IRQ_MASK);
raw_spin_unlock_irqrestore(&altera_gc->gpio_lock, flags);
gpiochip_disable_irq(&mm_gc->gc, irqd_to_hwirq(d));
}
/*
@ -233,6 +233,17 @@ static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
static const struct irq_chip altera_gpio_irq_chip = {
.name = "altera-gpio",
.irq_mask = altera_gpio_irq_mask,
.irq_unmask = altera_gpio_irq_unmask,
.irq_set_type = altera_gpio_irq_set_type,
.irq_startup = altera_gpio_irq_startup,
.irq_shutdown = altera_gpio_irq_mask,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int altera_gpio_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
@ -278,15 +289,9 @@ static int altera_gpio_probe(struct platform_device *pdev)
}
altera_gc->interrupt_trigger = reg;
altera_gc->irq_chip.name = "altera-gpio";
altera_gc->irq_chip.irq_mask = altera_gpio_irq_mask;
altera_gc->irq_chip.irq_unmask = altera_gpio_irq_unmask;
altera_gc->irq_chip.irq_set_type = altera_gpio_irq_set_type;
altera_gc->irq_chip.irq_startup = altera_gpio_irq_startup;
altera_gc->irq_chip.irq_shutdown = altera_gpio_irq_mask;
girq = &altera_gc->mmchip.gc.irq;
girq->chip = &altera_gc->irq_chip;
gpio_irq_chip_set_chip(girq, &altera_gpio_irq_chip);
if (altera_gc->interrupt_trigger == IRQ_TYPE_LEVEL_HIGH)
girq->parent_handler = altera_gpio_irq_leveL_high_handler;
else