diff options
| author |   Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-01-30 18:18:48 +0100 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2017-02-24 14:00:23 -0800 |
| commit | f201353273b6dec71940df01ea6eeb528d907941 (patch) | |
| tree | 80cb375e273dad5674b10b426c3335150ee7bce1 /drivers/watchdog/sama5d4_wdt.c | |
| parent | watchdog: sama5d4: Cache MR instead of a partial config (diff) | |
| download | linux-dev-f201353273b6dec71940df01ea6eeb528d907941.tar.xz linux-dev-f201353273b6dec71940df01ea6eeb528d907941.zip | |
watchdog: sama5d4: Implement resume hook
When resuming for the deepest state on sama5d2, it is necessary to restore
MR as the registers are lost.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/watchdog/sama5d4_wdt.c')
| -rw-r--r-- | drivers/watchdog/sama5d4_wdt.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/watchdog/sama5d4_wdt.c b/drivers/watchdog/sama5d4_wdt.c index 3230a842d015..f709962018ac 100644 --- a/drivers/watchdog/sama5d4_wdt.c +++ b/drivers/watchdog/sama5d4_wdt.c @@ -258,11 +258,28 @@ static const struct of_device_id sama5d4_wdt_of_match[] = { }; MODULE_DEVICE_TABLE(of, sama5d4_wdt_of_match); +#ifdef CONFIG_PM_SLEEP +static int sama5d4_wdt_resume(struct device *dev) +{ + struct sama5d4_wdt *wdt = dev_get_drvdata(dev); + + wdt_write(wdt, AT91_WDT_MR, wdt->mr & ~AT91_WDT_WDDIS); + if (wdt->mr & AT91_WDT_WDDIS) + wdt_write(wdt, AT91_WDT_MR, wdt->mr); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(sama5d4_wdt_pm_ops, NULL, + sama5d4_wdt_resume); + static struct platform_driver sama5d4_wdt_driver = { .probe = sama5d4_wdt_probe, .remove = sama5d4_wdt_remove, .driver = { .name = "sama5d4_wdt", + .pm = &sama5d4_wdt_pm_ops, .of_match_table = sama5d4_wdt_of_match, } }; |