gpiolib: Use IRQ hardware number getter instead of direct access

IRQ framework provides special type and getter to transform
the Linux IRQ to the hardware pin. Use that type and getter
function instead of direct access.

While at it, amend an indentation in a couple of places.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpiolib.c

@@ -1218,7 +1218,7 @@ static int gpiochip_hierarchy_irq_domain_alloc(struct irq_domain *d,
 	if (ret)
 		return ret;
 
-	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq,  hwirq);
+	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq, hwirq);
 
 	ret = girq->child_to_parent_hwirq(gc, hwirq, type,
 					  &parent_hwirq, &parent_type);
@@ -1386,8 +1386,7 @@ static bool gpiochip_hierarchy_is_hierarchical(struct gpio_chip *gc)
  * gpiochip by assigning the gpiochip as chip data, and using the irqchip
  * stored inside the gpiochip.
  */
-int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
-		     irq_hw_number_t hwirq)
+int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq)
 {
 	struct gpio_chip *gc = d->host_data;
 	int ret = 0;
@@ -1463,8 +1462,9 @@ int gpiochip_irq_domain_activate(struct irq_domain *domain,
 				 struct irq_data *data, bool reserve)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_lock_as_irq(gc, data->hwirq);
+	return gpiochip_lock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_activate);
 
@@ -1481,8 +1481,9 @@ void gpiochip_irq_domain_deactivate(struct irq_domain *domain,
 				    struct irq_data *data)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_unlock_as_irq(gc, data->hwirq);
+	return gpiochip_unlock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_deactivate);
 
@@ -1522,33 +1523,37 @@ static int gpiochip_to_irq(struct gpio_chip *gc, unsigned int offset)
 int gpiochip_irq_reqres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	return gpiochip_reqres_irq(gc, d->hwirq);
+	return gpiochip_reqres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_reqres);
 
 void gpiochip_irq_relres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_relres_irq(gc, d->hwirq);
+	gpiochip_relres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_relres);
 
 static void gpiochip_irq_mask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	if (gc->irq.irq_mask)
 		gc->irq.irq_mask(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_irq_unmask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	if (gc->irq.irq_unmask)
 		gc->irq.irq_unmask(d);
 }
@@ -1556,17 +1561,19 @@ static void gpiochip_irq_unmask(struct irq_data *d)
 static void gpiochip_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	gc->irq.irq_enable(d);
 }
 
 static void gpiochip_irq_disable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	gc->irq.irq_disable(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_set_irq_hooks(struct gpio_chip *gc)