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Subject[PATCH 2/2] watchdog: of_xilinx_wdt: Add suspend/resume support
Date
Add suspend/resume support to driver.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

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(&xdev->xilinx_wdt_wdd))
+ xilinx_wdt_stop(&xdev->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(&xdev->xilinx_wdt_wdd))
+ ret = xilinx_wdt_start(&xdev->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 = &xwdt_pm_ops,
},
};

--
1.9.1
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