[RFC PATCH] watchdog: rzn1: remove now obsolete interrupt support

[Wolfram Sang <wsa+renesas@sang-engineering.com>]

Previously, it was overlooked that the watchdog could reset the system
directly. So, a workaround using the interrupt which called
emergency_restart() was implemented. We now configure the controller
when booting properly to allow watchdog resets directly. Thus, remove
the interrupt workaround.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Depends on Herve's series[1]. I'll resend it once his changes are
upstream. But maybe people want to discuss it already?

[1] https://lore.kernel.org/r/20260313092417.294356-1-herve.codina@bootlin.com

"[PATCH v2 0/3] watchdog: rzn1: Add support for direct hardware reset"

 drivers/watchdog/rzn1_wdt.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/watchdog/rzn1_wdt.c b/drivers/watchdog/rzn1_wdt.c
index 98978b5cc5b4..0494a817b20a 100644
--- a/drivers/watchdog/rzn1_wdt.c
+++ b/drivers/watchdog/rzn1_wdt.c
@@ -79,14 +79,6 @@ static int rzn1_wdt_start(struct watchdog_device *w)
 	return 0;
 }
 
-static irqreturn_t rzn1_wdt_irq(int irq, void *_wdt)
-{
-	pr_crit("RZN1 Watchdog. Initiating system reboot\n");
-	emergency_restart();
-
-	return IRQ_HANDLED;
-}
-
 static struct watchdog_info rzn1_wdt_info = {
 	.identity = "RZ/N1 Watchdog",
 	.options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
@@ -101,12 +93,10 @@ static const struct watchdog_ops rzn1_wdt_ops = {
 static int rzn1_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
 	struct rzn1_watchdog *wdt;
 	unsigned long clk_rate;
 	struct clk *clk;
 	int ret;
-	int irq;
 
 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
 	if (!wdt)
@@ -116,15 +106,6 @@ static int rzn1_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(wdt->base))
 		return PTR_ERR(wdt->base);
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	ret = devm_request_irq(dev, irq, rzn1_wdt_irq, 0,
-			       np->name, wdt);
-	if (ret)
-		return dev_err_probe(dev, ret, "failed to request irq %d\n", irq);
-
 	clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(clk))
 		return dev_err_probe(dev, PTR_ERR(clk), "failed to get the clock\n");
-- 
2.47.3