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gpio: lpc18xx: Make irq_chip immutable

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Kernel warns about mutable irq_chips:
"not an immutable chip, please consider fixing!"

Constify lpc18xx_gpio_pin_ic, flag the irq_chip as IRQCHIP_IMMUTABLE,
add the new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250509-gpio-v1-3-639377c98288@nxp.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Peng Fan 2025-05-09 12:45:34 +08:00 • committed by Bartosz Golaszewski
parent a30be40bf1
commit 289e42df13
1 changed files with 11 additions and 2 deletions
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13
drivers/gpio/gpio-lpc18xx.c
View file

@ -42,6 +42,7 @@ struct lpc18xx_gpio_pin_ic {
void __iomem *base;
struct irq_domain *domain;
struct raw_spinlock lock;
struct gpio_chip *gpio;
};
struct lpc18xx_gpio_chip {
@ -74,6 +75,7 @@ static void lpc18xx_gpio_pin_ic_mask(struct irq_data *d)
{
struct lpc18xx_gpio_pin_ic *ic = d->chip_data;
u32 type = irqd_get_trigger_type(d);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
raw_spin_lock(&ic->lock);
@ -88,12 +90,17 @@ static void lpc18xx_gpio_pin_ic_mask(struct irq_data *d)
raw_spin_unlock(&ic->lock);
irq_chip_mask_parent(d);
gpiochip_disable_irq(ic->gpio, hwirq);
}
static void lpc18xx_gpio_pin_ic_unmask(struct irq_data *d)
{
struct lpc18xx_gpio_pin_ic *ic = d->chip_data;
u32 type = irqd_get_trigger_type(d);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
gpiochip_enable_irq(ic->gpio, hwirq);
raw_spin_lock(&ic->lock);
@ -149,13 +156,14 @@ static int lpc18xx_gpio_pin_ic_set_type(struct irq_data *d, unsigned int type)
return 0;
}
static struct irq_chip lpc18xx_gpio_pin_ic = {
static const struct irq_chip lpc18xx_gpio_pin_ic = {
.name = "LPC18xx GPIO pin",
.irq_mask = lpc18xx_gpio_pin_ic_mask,
.irq_unmask = lpc18xx_gpio_pin_ic_unmask,
.irq_eoi = lpc18xx_gpio_pin_ic_eoi,
.irq_set_type = lpc18xx_gpio_pin_ic_set_type,
.flags = IRQCHIP_SET_TYPE_MASKED,
.flags = IRQCHIP_IMMUTABLE | IRQCHIP_SET_TYPE_MASKED,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static int lpc18xx_gpio_pin_ic_domain_alloc(struct irq_domain *domain,
@ -251,6 +259,7 @@ static int lpc18xx_gpio_pin_ic_probe(struct lpc18xx_gpio_chip *gc)
goto free_iomap;
}
ic->gpio = &gc->gpio;
gc->pin_ic = ic;
return 0;