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SubjectRe: [PATCH v2] watchdog: sp805: add restart handler
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On 05/02/2018 12:59 AM, 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>
> ---
> drivers/watchdog/sp805_wdt.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
> index 03805bc..969369e 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
>
Please add the restart priority

watchdog_set_restart_priority(&wdt->wdd, 128);

before registering the watchdog.

Thanks,
Guenter

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