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wdt:Correct default heartbeat timeout

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Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
maoxiaochuan
2026-08-24 14:53:43 +08:00
parent 3004655ce5
commit 18fd836e7c
1 changed files with 25 additions and 16 deletions
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drivers/watchdog/loongson2_wdt.c
+25 -16
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@@ -44,6 +44,7 @@ static int ls2x_wdt_set_timeout(struct watchdog_device *wdt_dev,
unsigned int max_hw_heartbeat = wdt_dev->max_hw_heartbeat_ms / 1000; unsigned int max_hw_heartbeat = wdt_dev->max_hw_heartbeat_ms / 1000;
unsigned int counts; unsigned int counts;
pr_info("wdt==>max_hw_heartbeat:%d\n", max_hw_heartbeat);
wdt_dev->timeout = timeout; wdt_dev->timeout = timeout;
counts = drvdata->clk_rate * min(timeout, max_hw_heartbeat); counts = drvdata->clk_rate * min(timeout, max_hw_heartbeat);
@@ -88,9 +89,11 @@ static int ls2x_wdt_probe(struct platform_device *pdev)
{ {
struct ls2x_wdt_drvdata *drvdata; struct ls2x_wdt_drvdata *drvdata;
struct watchdog_device *ls2x_wdt; struct watchdog_device *ls2x_wdt;
unsigned long clk_rate; u32 clk_rate;
u32 max_hw_heartbeat_s;
struct resource *res; struct resource *res;
int err; int err;
struct device_node *np = pdev->dev.of_node;
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata) if (!drvdata)
@@ -101,31 +104,37 @@ static int ls2x_wdt_probe(struct platform_device *pdev)
if (IS_ERR(drvdata->base)) if (IS_ERR(drvdata->base))
return PTR_ERR(drvdata->base); return PTR_ERR(drvdata->base);
drvdata->clk = devm_clk_get(&pdev->dev, "wdt-clk"); if(!of_property_read_u32(np,"clock-frequency",&clk_rate)) {
if (IS_ERR(drvdata->clk)) drvdata->clk_rate = clk_rate;
return PTR_ERR(drvdata->clk); }else {
drvdata->clk = devm_clk_get(&pdev->dev, "wdt-clk");
if (IS_ERR(drvdata->clk))
return PTR_ERR(drvdata->clk);
err = clk_prepare_enable(drvdata->clk); err = clk_prepare_enable(drvdata->clk);
if (err) { if (err) {
dev_err(&pdev->dev, "clk enable failed\n"); dev_err(&pdev->dev, "clk enable failed\n");
return err; return err;
}
clk_rate = clk_get_rate(drvdata->clk);
if (!clk_rate) {
err = -EINVAL;
goto err0;
}
drvdata->clk_rate = clk_rate;
} }
clk_rate = clk_get_rate(drvdata->clk); max_hw_heartbeat_s = U32_MAX / clk_rate;
if (!clk_rate) {
err = -EINVAL;
goto err0;
}
drvdata->clk_rate = clk_rate;
ls2x_wdt = &drvdata->wdt; ls2x_wdt = &drvdata->wdt;
ls2x_wdt->info = &ls2x_wdt_info; ls2x_wdt->info = &ls2x_wdt_info;
ls2x_wdt->ops = &ls2x_wdt_ops; ls2x_wdt->ops = &ls2x_wdt_ops;
ls2x_wdt->timeout = DEFAULT_HEARTBEAT; ls2x_wdt->timeout = DEFAULT_HEARTBEAT > max_hw_heartbeat_s ? max_hw_heartbeat_s : DEFAULT_HEARTBEAT;
ls2x_wdt->min_timeout = 1; ls2x_wdt->min_timeout = 1;
ls2x_wdt->max_hw_heartbeat_ms = U32_MAX / clk_rate * 1000; ls2x_wdt->max_hw_heartbeat_ms = max_hw_heartbeat_s * 1000;
ls2x_wdt->parent = &pdev->dev; ls2x_wdt->parent = &pdev->dev;
pr_info("wdt timeout:%ds\n", ls2x_wdt->timeout);
watchdog_init_timeout(ls2x_wdt, heartbeat, &pdev->dev); watchdog_init_timeout(ls2x_wdt, heartbeat, &pdev->dev);
watchdog_set_nowayout(ls2x_wdt, nowayout); watchdog_set_nowayout(ls2x_wdt, nowayout);
watchdog_set_drvdata(ls2x_wdt, drvdata); watchdog_set_drvdata(ls2x_wdt, drvdata);