[PATCH v2 1/2] watchdog: add wdt suspend/resume support
Guenter Roeck
linux at roeck-us.net
Thu Jul 23 09:10:55 PDT 2015
On 07/22/2015 10:49 PM, Eddie Huang wrote:
> From: Greta Zhang <greta.zhang at mediatek.com>
>
> add wdt driver suspend/resume support
>
> Signed-off-by: Greta Zhang <greta.zhang at mediatek.com>
> Signed-off-by: Roger Lu <roger.lu at mediatek.com>
> Signed-off-by: Eddie Huang <eddie.huang at mediatek.com>
Subject line should identify the driver, ie mtk_wdt.
"wdt" doesn't really help.
Other than that,
Reviewed-by: Guenter Roeck <linux at roeck-us.net>
Guenter
> ---
> 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,
> },
> };
>
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