diff options
| author |   Michal Simek <michal.simek@xilinx.com> | 2017-08-07 13:24:23 +0200 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@iguana.be> | 2017-09-09 20:48:18 +0200 |
| commit | 6f671c6b6288fd673e8b8b8acf1070100ba8188a (patch) | |
| tree | b37d48df305feb7292348263de27fb46979c1e51 /drivers/watchdog | |
| parent | watchdog: of_xilinx_wdt: Add support for reading freq via CCF (diff) | |
| download | linux-dev-6f671c6b6288fd673e8b8b8acf1070100ba8188a.tar.xz linux-dev-6f671c6b6288fd673e8b8b8acf1070100ba8188a.zip | |
watchdog: of_xilinx_wdt: Add suspend/resume support
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>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/of_xilinx_wdt.c | 38 |
1 files changed, 38 insertions, 0 deletions
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 struct platform_driver xwdt_driver = { .driver = { .name = WATCHDOG_NAME, .of_match_table = xwdt_of_match, + .pm = &xwdt_pm_ops, }, }; |