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gpio: xlp: Convert to immutable irq_chip 

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

In this case the driver uses .mask_ack() and .unmask()
and since I have a vague idea about the semantics of
.mask_ack() I added .irq_enable() to the existing .irq_disable()
and called into the gpiolib core from those callbacks
instead of mask/unmask.

Cc: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Linus Walleij 2023-03-20 10:55:16 +01:00 committed by Bartosz Golaszewski
parent b4510f8fd5
commit 2093bcd872
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpio/gpio-xlp.c
View File

@ -90,6 +90,13 @@ static void xlp_gpio_set_reg(void __iomem *addr, unsigned gpio, int state)
writel(value, addr + regset);
}
static void xlp_gpio_irq_enable(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
gpiochip_enable_irq(gc, irqd_to_hwirq(d));
}
static void xlp_gpio_irq_disable(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
@ -100,6 +107,7 @@ static void xlp_gpio_irq_disable(struct irq_data *d)
xlp_gpio_set_reg(priv->gpio_intr_en, d->hwirq, 0x0);
__clear_bit(d->hwirq, priv->gpio_enabled_mask);
spin_unlock_irqrestore(&priv->lock, flags);
gpiochip_disable_irq(gc, irqd_to_hwirq(d));
}
static void xlp_gpio_irq_mask_ack(struct irq_data *d)
@ -163,10 +171,12 @@ static int xlp_gpio_set_irq_type(struct irq_data *d, unsigned int type)
static struct irq_chip xlp_gpio_irq_chip = {
.name = "XLP-GPIO",
.irq_mask_ack = xlp_gpio_irq_mask_ack,
.irq_enable = xlp_gpio_irq_enable,
.irq_disable = xlp_gpio_irq_disable,
.irq_set_type = xlp_gpio_set_irq_type,
.irq_unmask = xlp_gpio_irq_unmask,
.flags = IRQCHIP_ONESHOT_SAFE,
.flags = IRQCHIP_ONESHOT_SAFE | IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static void xlp_gpio_generic_handler(struct irq_desc *desc)
@ -272,7 +282,7 @@ static int xlp_gpio_probe(struct platform_device *pdev)
spin_lock_init(&priv->lock);
girq = &gc->irq;
girq->chip = &xlp_gpio_irq_chip;
gpio_irq_chip_set_chip(girq, &xlp_gpio_irq_chip);
girq->parent_handler = xlp_gpio_generic_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, 1,