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gpio: dln2: make irq_chip immutable 

Since recently, the kernel is nagging about mutable irq_chips:

   "not an immutable chip, please consider fixing it!"

Drop the unneeded copy, flag it as IRQCHIP_IMMUTABLE, add the new
helper functions and call the appropriate gpiolib functions.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2022-05-12 20:39:21 +03:00
parent f1138dacb7
commit b93a8b2c51
1 changed files with 14 additions and 9 deletions
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23
drivers/gpio/gpio-dln2.c
View File

@ -46,7 +46,6 @@
struct dln2_gpio {
struct platform_device *pdev;
struct gpio_chip gpio;
struct irq_chip irqchip;
/*
* Cache pin direction to save us one transfer, since the hardware has
@ -306,6 +305,7 @@ static void dln2_irq_unmask(struct irq_data *irqd)
struct dln2_gpio *dln2 = gpiochip_get_data(gc);
int pin = irqd_to_hwirq(irqd);
gpiochip_enable_irq(gc, pin);
set_bit(pin, dln2->unmasked_irqs);
}
@ -316,6 +316,7 @@ static void dln2_irq_mask(struct irq_data *irqd)
int pin = irqd_to_hwirq(irqd);
clear_bit(pin, dln2->unmasked_irqs);
gpiochip_disable_irq(gc, pin);
}
static int dln2_irq_set_type(struct irq_data *irqd, unsigned type)
@ -384,6 +385,17 @@ static void dln2_irq_bus_unlock(struct irq_data *irqd)
mutex_unlock(&dln2->irq_lock);
}
static const struct irq_chip dln2_irqchip = {
.name = "dln2-irq",
.irq_mask = dln2_irq_mask,
.irq_unmask = dln2_irq_unmask,
.irq_set_type = dln2_irq_set_type,
.irq_bus_lock = dln2_irq_bus_lock,
.irq_bus_sync_unlock = dln2_irq_bus_unlock,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static void dln2_gpio_event(struct platform_device *pdev, u16 echo,
const void *data, int len)
{
@ -465,15 +477,8 @@ static int dln2_gpio_probe(struct platform_device *pdev)
dln2->gpio.direction_output = dln2_gpio_direction_output;
dln2->gpio.set_config = dln2_gpio_set_config;
dln2->irqchip.name = "dln2-irq",
dln2->irqchip.irq_mask = dln2_irq_mask,
dln2->irqchip.irq_unmask = dln2_irq_unmask,
dln2->irqchip.irq_set_type = dln2_irq_set_type,
dln2->irqchip.irq_bus_lock = dln2_irq_bus_lock,
dln2->irqchip.irq_bus_sync_unlock = dln2_irq_bus_unlock,
girq = &dln2->gpio.irq;
girq->chip = &dln2->irqchip;
gpio_irq_chip_set_chip(girq, &dln2_irqchip);
/* The event comes from the outside so no parent handler */
girq->parent_handler = NULL;
girq->num_parents = 0;