watchdog: shwdt: Preliminary runtime PM support.
This plugs in some trivial runtime PM support in the probe/remove and
start/stop paths.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/watchdog/shwdt.c b/drivers/watchdog/shwdt.c
index 380ada4..b1110470 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -28,6 +28,7 @@
#include <linux/spinlock.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
+#include <linux/pm_runtime.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/slab.h>
@@ -87,6 +88,8 @@
unsigned long flags;
u8 csr;
+ pm_runtime_get_sync(wdt->dev);
+
spin_lock_irqsave(&wdt->lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
@@ -137,6 +140,8 @@
spin_unlock_irqrestore(&wdt->lock, flags);
+ pm_runtime_put_sync(wdt->dev);
+
return 0;
}
@@ -283,6 +288,8 @@
dev_info(&pdev->dev, "initialized.\n");
+ pm_runtime_enable(&pdev->dev);
+
return 0;
out_disable:
@@ -300,6 +307,7 @@
watchdog_unregister_device(&sh_wdt_dev);
+ pm_runtime_disable(&pdev->dev);
clk_disable(wdt->clk);
clk_put(wdt->clk);