[PATCH v2 1/2] watchdog: add wdt suspend/resume support
From: linux@roeck-us.net (Guenter Roeck)
Date: 2015-07-23 16:11:16
Also in:
linux-mediatek, linux-watchdog, lkml
On 07/22/2015 10:49 PM, Eddie Huang wrote:
From: Greta Zhang <redacted> add wdt driver suspend/resume support Signed-off-by: Greta Zhang <redacted> Signed-off-by: Roger Lu <redacted> Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Subject line should identify the driver, ie mtk_wdt. "wdt" doesn't really help. Other than that, Reviewed-by: Guenter Roeck <linux@roeck-us.net> Guenter
quoted hunk ↗ jump to hunk
--- drivers/watchdog/mtk_wdt.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 938b987..056412c 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c@@ -221,17 +221,47 @@ static int mtk_wdt_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int mtk_wdt_suspend(struct device *dev) +{ + struct mtk_wdt_dev *mtk_wdt = dev_get_drvdata(dev); + + if (watchdog_active(&mtk_wdt->wdt_dev)) + mtk_wdt_stop(&mtk_wdt->wdt_dev); + + return 0; +} + +static int mtk_wdt_resume(struct device *dev) +{ + struct mtk_wdt_dev *mtk_wdt = dev_get_drvdata(dev); + + if (watchdog_active(&mtk_wdt->wdt_dev)) { + mtk_wdt_start(&mtk_wdt->wdt_dev); + mtk_wdt_ping(&mtk_wdt->wdt_dev); + } + + return 0; +} +#endif + static const struct of_device_id mtk_wdt_dt_ids[] = { { .compatible = "mediatek,mt6589-wdt" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids); +static const struct dev_pm_ops mtk_wdt_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mtk_wdt_suspend, + mtk_wdt_resume) +}; + static struct platform_driver mtk_wdt_driver = { .probe = mtk_wdt_probe, .remove = mtk_wdt_remove, .driver = { .name = DRV_NAME, + .pm = &mtk_wdt_pm_ops, .of_match_table = mtk_wdt_dt_ids, }, };