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watchdog: rzn1: remove now obsolete interrupt support

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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>
Reviewed-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20260507102410.43384-4-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wolfram Sang 2026-05-07 12:24:08 +02:00 committed by Guenter Roeck
parent 29d71b732b
commit fafd036b80
1 changed files with 0 additions and 19 deletions
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19
drivers/watchdog/rzn1_wdt.c
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@ -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");