[PATCH] watchdog: mtk_wdt: use platform_get_irq_optional

[Tzung-Bi Shih]

The watchdog pre-timeout (bark) interrupt is optional.  Use
platform_get_irq_optional() to avoid seeing such following
error message:
>>> mtk-wdt 10007000.watchdog: IRQ index 0 not found

Signed-off-by: Tzung-Bi Shih <tzungbi at google.com>
---
The patch bases on linux-next next-20211208.

 drivers/watchdog/mtk_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 543cf38bd04e..4577a76dd464 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -339,7 +339,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(mtk_wdt->wdt_base))
 		return PTR_ERR(mtk_wdt->wdt_base);
 
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq_optional(pdev, 0);
 	if (irq > 0) {
 		err = devm_request_irq(&pdev->dev, irq, mtk_wdt_isr, 0, "wdt_bark",
 				       &mtk_wdt->wdt_dev);
-- 
2.34.1.173.g76aa8bc2d0-goog