gpio: wcove: 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>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index 16a0fae..c18b6b4 100644 (file)
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -299,6 +299,8 @@ static void wcove_irq_unmask(struct irq_data *data)
        if (gpio >= WCOVE_GPIO_NUM)
                return;
 
+       gpiochip_enable_irq(chip, gpio);
+
        wg->set_irq_mask = false;
        wg->update |= UPDATE_IRQ_MASK;
 }
@@ -314,15 +316,19 @@ static void wcove_irq_mask(struct irq_data *data)
 
        wg->set_irq_mask = true;
        wg->update |= UPDATE_IRQ_MASK;
+
+       gpiochip_disable_irq(chip, gpio);
 }
 
-static struct irq_chip wcove_irqchip = {
+static const struct irq_chip wcove_irqchip = {
        .name                   = "Whiskey Cove",
        .irq_mask               = wcove_irq_mask,
        .irq_unmask             = wcove_irq_unmask,
        .irq_set_type           = wcove_irq_type,
        .irq_bus_lock           = wcove_bus_lock,
        .irq_bus_sync_unlock    = wcove_bus_sync_unlock,
+       .flags                  = IRQCHIP_IMMUTABLE,
+       GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static irqreturn_t wcove_gpio_irq_handler(int irq, void *data)
@@ -452,7 +458,7 @@ static int wcove_gpio_probe(struct platform_device *pdev)
        }
 
        girq = &wg->chip.irq;
-       girq->chip = &wcove_irqchip;
+       gpio_irq_chip_set_chip(girq, &wcove_irqchip);
        /* This will let us handle the parent IRQ in the driver */
        girq->parent_handler = NULL;
        girq->num_parents = 0;