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gpio: pci-idio-16: 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: William Breathitt Gray <william.gray@linaro.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 08:46:04 +01:00 committed by Bartosz Golaszewski
parent 39575d114f
commit 141d552756
1 changed files with 9 additions and 3 deletions
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12
drivers/gpio/gpio-pci-idio-16.c
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@ -107,6 +107,8 @@ static void idio_16_irq_mask(struct irq_data *data)
raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
}
gpiochip_disable_irq(chip, irqd_to_hwirq(data));
}
static void idio_16_irq_unmask(struct irq_data *data)
@ -117,6 +119,8 @@ static void idio_16_irq_unmask(struct irq_data *data)
const unsigned long prev_irq_mask = idio16gpio->irq_mask;
unsigned long flags;
gpiochip_enable_irq(chip, irqd_to_hwirq(data));
idio16gpio->irq_mask |= mask;
if (!prev_irq_mask) {
@ -138,12 +142,14 @@ static int idio_16_irq_set_type(struct irq_data *data, unsigned int flow_type)
return 0;
}
static struct irq_chip idio_16_irqchip = {
static const struct irq_chip idio_16_irqchip = {
.name = "pci-idio-16",
.irq_ack = idio_16_irq_ack,
.irq_mask = idio_16_irq_mask,
.irq_unmask = idio_16_irq_unmask,
.irq_set_type = idio_16_irq_set_type
.irq_set_type = idio_16_irq_set_type,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
@ -242,7 +248,7 @@ static int idio_16_probe(struct pci_dev *pdev, const struct pci_device_id *id)
idio_16_state_init(&idio16gpio->state);
girq = &idio16gpio->chip.irq;
girq->chip = &idio_16_irqchip;
gpio_irq_chip_set_chip(girq, &idio_16_irqchip);
/* This will let us handle the parent IRQ in the driver */
girq->parent_handler = NULL;
girq->num_parents = 0;