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watchdog: of_xilinx_wdt: Add suspend/resume support

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Add suspend/resume support to driver.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Michal Simek 2017-08-07 13:24:23 +02:00 committed by Wim Van Sebroeck
parent b6bc416455
commit 6f671c6b62
1 changed files with 38 additions and 0 deletions
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38
drivers/watchdog/of_xilinx_wdt.c
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@ -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 struct platform_driver xwdt_driver = {
.driver = {
.name = WATCHDOG_NAME,
.of_match_table = xwdt_of_match,
.pm = &xwdt_pm_ops,
},
};