gpio: sch: 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: Bartosz Golaszewski <brgl@bgdev.pl>

diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index acda4c5..8a83f7b 100644 (file)
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -38,7 +38,6 @@
 
 struct sch_gpio {
        struct gpio_chip chip;
-       struct irq_chip irqchip;
        spinlock_t lock;
        unsigned short iobase;
        unsigned short resume_base;
@@ -218,11 +217,9 @@ static void sch_irq_ack(struct irq_data *d)
        spin_unlock_irqrestore(&sch->lock, flags);
 }
 
-static void sch_irq_mask_unmask(struct irq_data *d, int val)
+static void sch_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t gpio_num, int val)
 {
-       struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
        struct sch_gpio *sch = gpiochip_get_data(gc);
-       irq_hw_number_t gpio_num = irqd_to_hwirq(d);
        unsigned long flags;
 
        spin_lock_irqsave(&sch->lock, flags);
@@ -232,14 +229,32 @@ static void sch_irq_mask_unmask(struct irq_data *d, int val)
 
 static void sch_irq_mask(struct irq_data *d)
 {
-       sch_irq_mask_unmask(d, 0);
+       struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+       irq_hw_number_t gpio_num = irqd_to_hwirq(d);
+
+       sch_irq_mask_unmask(gc, gpio_num, 0);
+       gpiochip_disable_irq(gc, gpio_num);
 }
 
 static void sch_irq_unmask(struct irq_data *d)
 {
-       sch_irq_mask_unmask(d, 1);
+       struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+       irq_hw_number_t gpio_num = irqd_to_hwirq(d);
+
+       gpiochip_enable_irq(gc, gpio_num);
+       sch_irq_mask_unmask(gc, gpio_num, 1);
 }
 
+static const struct irq_chip sch_irqchip = {
+       .name = "sch_gpio",
+       .irq_ack = sch_irq_ack,
+       .irq_mask = sch_irq_mask,
+       .irq_unmask = sch_irq_unmask,
+       .irq_set_type = sch_irq_type,
+       .flags = IRQCHIP_IMMUTABLE,
+       GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
 static u32 sch_gpio_gpe_handler(acpi_handle gpe_device, u32 gpe, void *context)
 {
        struct sch_gpio *sch = context;
@@ -367,14 +382,8 @@ static int sch_gpio_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, sch);
 
-       sch->irqchip.name = "sch_gpio";
-       sch->irqchip.irq_ack = sch_irq_ack;
-       sch->irqchip.irq_mask = sch_irq_mask;
-       sch->irqchip.irq_unmask = sch_irq_unmask;
-       sch->irqchip.irq_set_type = sch_irq_type;
-
        girq = &sch->chip.irq;
-       girq->chip = &sch->irqchip;
+       gpio_irq_chip_set_chip(girq, &sch_irqchip);
        girq->num_parents = 0;
        girq->parents = NULL;
        girq->parent_handler = NULL;