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path: root/drivers/watchdog/davinci_wdt.c
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Diffstat (limited to 'drivers/watchdog/davinci_wdt.c')
-rw-r--r--drivers/watchdog/davinci_wdt.c45
1 files changed, 17 insertions, 28 deletions
diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
index ebb85d60b6d5..7b2ee35b5ffd 100644
--- a/drivers/watchdog/davinci_wdt.c
+++ b/drivers/watchdog/davinci_wdt.c
@@ -191,11 +191,15 @@ static const struct watchdog_ops davinci_wdt_ops = {
.restart = davinci_wdt_restart,
};
+static void davinci_clk_disable_unprepare(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
static int davinci_wdt_probe(struct platform_device *pdev)
{
int ret = 0;
struct device *dev = &pdev->dev;
- struct resource *wdt_mem;
struct watchdog_device *wdd;
struct davinci_wdt_device *davinci_wdt;
@@ -207,15 +211,19 @@ static int davinci_wdt_probe(struct platform_device *pdev)
if (IS_ERR(davinci_wdt->clk)) {
if (PTR_ERR(davinci_wdt->clk) != -EPROBE_DEFER)
- dev_err(&pdev->dev, "failed to get clock node\n");
+ dev_err(dev, "failed to get clock node\n");
return PTR_ERR(davinci_wdt->clk);
}
ret = clk_prepare_enable(davinci_wdt->clk);
if (ret) {
- dev_err(&pdev->dev, "failed to prepare clock\n");
+ dev_err(dev, "failed to prepare clock\n");
return ret;
}
+ ret = devm_add_action_or_reset(dev, davinci_clk_disable_unprepare,
+ davinci_wdt->clk);
+ if (ret)
+ return ret;
platform_set_drvdata(pdev, davinci_wdt);
@@ -225,7 +233,7 @@ static int davinci_wdt_probe(struct platform_device *pdev)
wdd->min_timeout = 1;
wdd->max_timeout = MAX_HEARTBEAT;
wdd->timeout = DEFAULT_HEARTBEAT;
- wdd->parent = &pdev->dev;
+ wdd->parent = dev;
watchdog_init_timeout(wdd, heartbeat, dev);
@@ -235,35 +243,17 @@ static int davinci_wdt_probe(struct platform_device *pdev)
watchdog_set_nowayout(wdd, 1);
watchdog_set_restart_priority(wdd, 128);
- wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- davinci_wdt->base = devm_ioremap_resource(dev, wdt_mem);
- if (IS_ERR(davinci_wdt->base)) {
- ret = PTR_ERR(davinci_wdt->base);
- goto err_clk_disable;
- }
+ davinci_wdt->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(davinci_wdt->base))
+ return PTR_ERR(davinci_wdt->base);
- ret = watchdog_register_device(wdd);
+ ret = devm_watchdog_register_device(dev, wdd);
if (ret) {
dev_err(dev, "cannot register watchdog device\n");
- goto err_clk_disable;
+ return ret;
}
return 0;
-
-err_clk_disable:
- clk_disable_unprepare(davinci_wdt->clk);
-
- return ret;
-}
-
-static int davinci_wdt_remove(struct platform_device *pdev)
-{
- struct davinci_wdt_device *davinci_wdt = platform_get_drvdata(pdev);
-
- watchdog_unregister_device(&davinci_wdt->wdd);
- clk_disable_unprepare(davinci_wdt->clk);
-
- return 0;
}
static const struct of_device_id davinci_wdt_of_match[] = {
@@ -278,7 +268,6 @@ static struct platform_driver platform_wdt_driver = {
.of_match_table = davinci_wdt_of_match,
},
.probe = davinci_wdt_probe,
- .remove = davinci_wdt_remove,
};
module_platform_driver(platform_wdt_driver);