[PATCH 2/2] watchdog: of_xilinx_wdt: Add suspend/resume support

[Michal Simek]

Add suspend/resume support to driver.

Signed-off-by: Michal Simek 
---

 drivers/watchdog/of_xilinx_wdt.c | 38 ++
 1 file changed, 38 insertions(+)

diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index 41edeb93a327..1cf286945b7a 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -264,6 +264,43 @@ static int xwdt_remove(struct platform_device *pdev)
return 0;
 }
 
+/**
+ * xwdt_suspend - Suspend the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 always.
+ */
+static int __maybe_unused xwdt_suspend(struct device *dev)
+{
+   struct platform_device *pdev = to_platform_device(dev);
+   struct xwdt_device *xdev = platform_get_drvdata(pdev);
+
+   if (watchdog_active(>xilinx_wdt_wdd))
+   xilinx_wdt_stop(>xilinx_wdt_wdd);
+
+   return 0;
+}
+
+/**
+ * xwdt_resume - Resume the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 on success, errno otherwise.
+ */
+static int __maybe_unused xwdt_resume(struct device *dev)
+{
+   struct platform_device *pdev = to_platform_device(dev);
+   struct xwdt_device *xdev = platform_get_drvdata(pdev);
+   int ret = 0;
+
+   if (watchdog_active(>xilinx_wdt_wdd))
+   ret = xilinx_wdt_start(>xilinx_wdt_wdd);
+
+   return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(xwdt_pm_ops, xwdt_suspend, xwdt_resume);
+
 /* Match table for of_platform binding */
 static const struct of_device_id xwdt_of_match[] = {
{ .compatible = "xlnx,xps-timebase-wdt-1.00.a", },
@@ -278,6 +315,7 @@ static int xwdt_remove(struct platform_device *pdev)
.driver = {
.name  = WATCHDOG_NAME,
.of_match_table = xwdt_of_match,
+   .pm = _pm_ops,
},
 };
 
-- 
1.9.1

[PATCH 2/2] watchdog: of_xilinx_wdt: Add suspend/resume support

[Michal Simek]

Add suspend/resume support to driver.

Signed-off-by: Michal Simek 
---

 drivers/watchdog/of_xilinx_wdt.c | 38 ++
 1 file changed, 38 insertions(+)

diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index 41edeb93a327..1cf286945b7a 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -264,6 +264,43 @@ static int xwdt_remove(struct platform_device *pdev)
return 0;
 }
 
+/**
+ * xwdt_suspend - Suspend the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 always.
+ */
+static int __maybe_unused xwdt_suspend(struct device *dev)
+{
+   struct platform_device *pdev = to_platform_device(dev);
+   struct xwdt_device *xdev = platform_get_drvdata(pdev);
+
+   if (watchdog_active(>xilinx_wdt_wdd))
+   xilinx_wdt_stop(>xilinx_wdt_wdd);
+
+   return 0;
+}
+
+/**
+ * xwdt_resume - Resume the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 on success, errno otherwise.
+ */
+static int __maybe_unused xwdt_resume(struct device *dev)
+{
+   struct platform_device *pdev = to_platform_device(dev);
+   struct xwdt_device *xdev = platform_get_drvdata(pdev);
+   int ret = 0;
+
+   if (watchdog_active(>xilinx_wdt_wdd))
+   ret = xilinx_wdt_start(>xilinx_wdt_wdd);
+
+   return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(xwdt_pm_ops, xwdt_suspend, xwdt_resume);
+
 /* Match table for of_platform binding */
 static const struct of_device_id xwdt_of_match[] = {
{ .compatible = "xlnx,xps-timebase-wdt-1.00.a", },
@@ -278,6 +315,7 @@ static int xwdt_remove(struct platform_device *pdev)
.driver = {
.name  = WATCHDOG_NAME,
.of_match_table = xwdt_of_match,
+   .pm = _pm_ops,
},
 };
 
-- 
1.9.1