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SubjectRe: [PATCH v3] watchdog: sp805: add restart handler
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Date
On 05/03/2018 11:05 PM, Jongsung Kim wrote:
> Add restart handler for SP805 watchdog so that the driver can be
> used to reboot the system.
>
> Signed-off-by: Jongsung Kim <neidhard.kim@lge.com>
> Cc: Guenter Roeck <linux@roeck-us.net>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---

For future patches: change log goes here, please.

Thanks,
Guenter

> drivers/watchdog/sp805_wdt.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
> index 03805bc..9849db0 100644
> --- a/drivers/watchdog/sp805_wdt.c
> +++ b/drivers/watchdog/sp805_wdt.c
> @@ -121,6 +121,18 @@ static unsigned int wdt_timeleft(struct watchdog_device *wdd)
> return div_u64(load, rate);
> }
>
> +static int
> +wdt_restart(struct watchdog_device *wdd, unsigned long mode, void *cmd)
> +{
> + struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
> +
> + writel_relaxed(0, wdt->base + WDTCONTROL);
> + writel_relaxed(0, wdt->base + WDTLOAD);
> + writel_relaxed(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL);
> +
> + return 0;
> +}
> +
> static int wdt_config(struct watchdog_device *wdd, bool ping)
> {
> struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
> @@ -197,6 +209,7 @@ static const struct watchdog_ops wdt_ops = {
> .ping = wdt_ping,
> .set_timeout = wdt_setload,
> .get_timeleft = wdt_timeleft,
> + .restart = wdt_restart,
> };
>
> static int
> @@ -230,6 +243,7 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
> spin_lock_init(&wdt->lock);
> watchdog_set_nowayout(&wdt->wdd, nowayout);
> watchdog_set_drvdata(&wdt->wdd, wdt);
> + watchdog_set_restart_priority(&wdt->wdd, 128);
> wdt_setload(&wdt->wdd, DEFAULT_TIMEOUT);
>
> ret = watchdog_register_device(&wdt->wdd);
>

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