On Tue, Oct 17, 2017 at 05:30:22PM +0200, Michael Grzeschik wrote:
> From: Michael Grzeschik <mgr@xxxxxxxxxxxxxx>
>
> Register a restart handler for the da9062 watchdog. System restart is
> triggered by sending the shutdown command to the PMIC.
> As more-suitable restart handlers may exist, the priority of the
> watchdog restart handler is set to 128.
>
> Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/watchdog/da9062_wdt.c | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
> index 9083d3d922b0b..4349a02215489 100644
> --- a/drivers/watchdog/da9062_wdt.c
> +++ b/drivers/watchdog/da9062_wdt.c
> @@ -175,6 +175,25 @@ static int da9062_wdt_set_timeout(struct watchdog_device *wdd,
> return ret;
> }
>
> +static int da9062_wdt_restart(struct watchdog_device *wdd, unsigned long action,
> + void *data)
> +{
> + struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
> + int ret;
> +
> + ret = regmap_write(wdt->hw->regmap,
> + DA9062AA_CONTROL_F,
> + DA9062AA_SHUTDOWN_MASK);
> + if (ret)
> + dev_alert(wdt->hw->dev, "Failed to shutdown (err = %d)\n",
> + ret);
> +
> + /* wait for reset to assert... */
> + mdelay(500);
> +
> + return ret;
> +}
> +
> static const struct watchdog_info da9062_watchdog_info = {
> .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
> .identity = "DA9062 WDT",
> @@ -186,6 +205,7 @@ static const struct watchdog_ops da9062_watchdog_ops = {
> .stop = da9062_wdt_stop,
> .ping = da9062_wdt_ping,
> .set_timeout = da9062_wdt_set_timeout,
> + .restart = da9062_wdt_restart,
> };
>
> static const struct of_device_id da9062_compatible_id_table[] = {
> @@ -219,6 +239,8 @@ static int da9062_wdt_probe(struct platform_device *pdev)
> wdt->wdtdev.status = WATCHDOG_NOWAYOUT_INIT_STATUS;
> wdt->wdtdev.parent = &pdev->dev;
>
> + watchdog_set_restart_priority(&wdt->wdtdev, 128);
> +
> watchdog_set_drvdata(&wdt->wdtdev, wdt);
>
> ret = devm_watchdog_register_device(&pdev->dev, &wdt->wdtdev);
--
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