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gpio: 104-idio-16: Make irq_chip immutable 

Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
This commit is contained in:
William Breathitt Gray 2022-09-02 13:45:25 -04:00 committed by Bartosz Golaszewski
parent fa1329f9e4
commit 410a5041aa
1 changed files with 11 additions and 7 deletions
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18
drivers/gpio/gpio-104-idio-16.c
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@ -174,10 +174,11 @@ static void idio_16_irq_mask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);
const unsigned long mask = BIT(irqd_to_hwirq(data));
const unsigned long offset = irqd_to_hwirq(data);
unsigned long flags;
idio16gpio->irq_mask &= ~mask;
idio16gpio->irq_mask &= ~BIT(offset);
gpiochip_disable_irq(chip, offset);
if (!idio16gpio->irq_mask) {
raw_spin_lock_irqsave(&idio16gpio->lock, flags);
@ -192,11 +193,12 @@ static void idio_16_irq_unmask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);
const unsigned long mask = BIT(irqd_to_hwirq(data));
const unsigned long offset = irqd_to_hwirq(data);
const unsigned long prev_irq_mask = idio16gpio->irq_mask;
unsigned long flags;
idio16gpio->irq_mask |= mask;
gpiochip_enable_irq(chip, offset);
idio16gpio->irq_mask |= BIT(offset);
if (!prev_irq_mask) {
raw_spin_lock_irqsave(&idio16gpio->lock, flags);
@ -217,12 +219,14 @@ 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 = "104-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)
@ -299,7 +303,7 @@ static int idio_16_probe(struct device *dev, unsigned int id)
idio16gpio->out_state = 0xFFFF;
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;