[PATCH] pinctrl: samsung: Use bank name as irqchip name

[Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>]

Use the bank name as the irqchip name. This name is later visible in
/proc/interrupts, what makes it possible to easily identify each
GPIO interrupt.

/proc/interrupts before this patch:
143:    0     exynos4210_wkup_irq_chip   7 Edge      hdmi
144:    0     exynos4210_wkup_irq_chip   6 Level     wm8994
145:    1     exynos4210_wkup_irq_chip   7 Edge      max77686-pmic, max77686-rtc
146:    1     exynos_gpio_irq_chip   3 Edge      3-0048

/proc/interrupts after this patch:
143:    0     gpx3   7 Edge      hdmi
144:    0     gpx3   6 Level     wm8994
145:    1     gpx0   7 Edge      max77686-pmic, max77686-rtc
146:    1     gpm2   3 Edge      3-0048

Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
 drivers/pinctrl/samsung/pinctrl-exynos.c | 27 +++++++++++++++---------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 84501c785473..1c87cf41602a 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -207,7 +207,7 @@ static void exynos_irq_release_resources(struct irq_data *irqd)
 /*
  * irq_chip for gpio interrupts.
  */
-static struct exynos_irq_chip exynos_gpio_irq_chip = {
+static const struct exynos_irq_chip exynos_gpio_irq_chip __initconst = {
 	.chip = {
 		.name = "exynos_gpio_irq_chip",
 		.irq_unmask = exynos_irq_unmask,
@@ -313,7 +313,13 @@ int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
 			goto err_domains;
 		}
 
-		bank->irq_chip = &exynos_gpio_irq_chip;
+		bank->irq_chip = kmemdup(&exynos_gpio_irq_chip,
+					 sizeof(*bank->irq_chip), GFP_KERNEL);
+		if (!bank->irq_chip) {
+			ret = -ENOMEM;
+			goto err_domains;
+		}
+		bank->irq_chip->chip.name = bank->name;
 	}
 
 	return 0;
@@ -521,7 +527,7 @@ int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 	struct samsung_pin_bank *bank;
 	struct exynos_weint_data *weint_data;
 	struct exynos_muxed_weint_data *muxed_data;
-	struct exynos_irq_chip *irq_chip;
+	const struct exynos_irq_chip *irq_chip;
 	unsigned int muxed_banks = 0;
 	unsigned int i;
 	int idx, irq;
@@ -531,12 +537,7 @@ int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 
 		match = of_match_node(exynos_wkup_irq_ids, np);
 		if (match) {
-			irq_chip = kmemdup(match->data,
-				sizeof(*irq_chip), GFP_KERNEL);
-			if (!irq_chip) {
-				of_node_put(np);
-				return -ENOMEM;
-			}
+			irq_chip = match->data;
 			wkup_np = np;
 			break;
 		}
@@ -557,7 +558,13 @@ int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 			return -ENXIO;
 		}
 
-		bank->irq_chip = irq_chip;
+		bank->irq_chip = kmemdup(irq_chip, sizeof(*irq_chip),
+					 GFP_KERNEL);
+		if (!bank->irq_chip) {
+			of_node_put(wkup_np);
+			return -ENOMEM;
+		}
+		bank->irq_chip->chip.name = bank->name;
 
 		if (!of_find_property(bank->of_node, "interrupts", NULL)) {
 			bank->eint_type = EINT_TYPE_WKUP_MUX;
-- 
2.17.1