[PATCHv2 2/3] watchdog: sama5d4: use platform_get_irq_optional()

[Rosen Penev <rosenp@gmail.com>]

irq_of_parse_and_map() requires irq_dispose_mapping() on failure. Don't
bother with it as platform_get_irq_optional() doesn't need it.

Also handle EPROBE_DEFER.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/watchdog/sama5d4_wdt.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c
index f74f1e8956b5..2536e2f2ab32 100644
--- a/drivers/watchdog/sama5d4_wdt.c
+++ b/drivers/watchdog/sama5d4_wdt.c
@@ -11,7 +11,6 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
 #include <linux/watchdog.h>
@@ -245,7 +244,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
 	struct watchdog_device *wdd;
 	struct sama5d4_wdt *wdt;
 	void __iomem *regs;
-	u32 irq = 0;
+	int irq = 0;
 	u32 reg;
 	int ret;
 
@@ -281,8 +280,11 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
 		return ret;
 
 	if (wdt->need_irq) {
-		irq = irq_of_parse_and_map(dev->of_node, 0);
-		if (!irq) {
+		irq = platform_get_irq_optional(pdev, 0);
+		if (irq == -EPROBE_DEFER)
+			return irq;
+
+		if (irq < 0) {
 			dev_warn(dev, "failed to get IRQ from DT\n");
 			wdt->need_irq = false;
 		}
-- 
2.54.0