On 11/02/2015 05:36 PM, Damien Riegel wrote:
Get rid of the custom restart handler by using the one provided by the
watchdog core.
Signed-off-by: Damien Riegel <damien.riegel@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
drivers/watchdog/qcom-wdt.c | 63 +++++++++++++++++++--------------------------
1 file changed, 26 insertions(+), 37 deletions(-)
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index 773dcfa..aa7105d 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -17,7 +17,6 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
-#include <linux/reboot.h>
#include <linux/watchdog.h>
#define WDT_RST 0x38
@@ -28,7 +27,6 @@ struct qcom_wdt {
struct watchdog_device wdd;
struct clk *clk;
unsigned long rate;
- struct notifier_block restart_nb;
void __iomem *base;
};
@@ -72,11 +70,37 @@ static int qcom_wdt_set_timeout(struct watchdog_device *wdd,
return qcom_wdt_start(wdd);
}
+static int qcom_wdt_restart(struct watchdog_device *wdd)
+{
+ struct qcom_wdt *wdt = to_qcom_wdt(wdd);
+ u32 timeout;
+
+ /*
+ * Trigger watchdog bite:
+ * Setup BITE_TIME to be 128ms, and enable WDT.
+ */
+ timeout = 128 * wdt->rate / 1000;
+
+ writel(0, wdt->base + WDT_EN);
+ writel(1, wdt->base + WDT_RST);
+ writel(timeout, wdt->base + WDT_BITE_TIME);
+ writel(1, wdt->base + WDT_EN);
+
+ /*
+ * Actually make sure the above sequence hits hardware before sleeping.
+ */
+ wmb();
+
+ msleep(150);
+ return 0;
+}
+
static const struct watchdog_ops qcom_wdt_ops = {
.start = qcom_wdt_start,
.stop = qcom_wdt_stop,
.ping = qcom_wdt_ping,
.set_timeout = qcom_wdt_set_timeout,
+ .restart = qcom_wdt_restart,
.owner = THIS_MODULE,
};
@@ -87,32 +111,6 @@ static const struct watchdog_info qcom_wdt_info = {
.identity = KBUILD_MODNAME,
};
-static int qcom_wdt_restart(struct notifier_block *nb, unsigned long action,
- void *data)
-{
- struct qcom_wdt *wdt = container_of(nb, struct qcom_wdt, restart_nb);
- u32 timeout;
-
- /*
- * Trigger watchdog bite:
- * Setup BITE_TIME to be 128ms, and enable WDT.
- */
- timeout = 128 * wdt->rate / 1000;
-
- writel(0, wdt->base + WDT_EN);
- writel(1, wdt->base + WDT_RST);
- writel(timeout, wdt->base + WDT_BITE_TIME);
- writel(1, wdt->base + WDT_EN);
-
- /*
- * Actually make sure the above sequence hits hardware before sleeping.
- */
- wmb();
-
- msleep(150);
- return NOTIFY_DONE;
-}
-
static int qcom_wdt_probe(struct platform_device *pdev)
{
struct qcom_wdt *wdt;
@@ -187,14 +185,6 @@ static int qcom_wdt_probe(struct platform_device *pdev)
goto err_clk_unprepare;
}
- /*
- * WDT restart notifier has priority 0 (use as a last resort)
- */
- wdt->restart_nb.notifier_call = qcom_wdt_restart;
- ret = register_restart_handler(&wdt->restart_nb);
- if (ret)
- dev_err(&pdev->dev, "failed to setup restart handler\n");
-
platform_set_drvdata(pdev, wdt);
return 0;
@@ -207,7 +197,6 @@ static int qcom_wdt_remove(struct platform_device *pdev)
{
struct qcom_wdt *wdt = platform_get_drvdata(pdev);
- unregister_restart_handler(&wdt->restart_nb);
watchdog_unregister_device(&wdt->wdd);
clk_disable_unprepare(wdt->clk);
return 0;
--
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