linux-kernel - Re: [PATCH] watchdog: meson_gxbb

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Date:   Tue, 22 Jun 2021 19:53:21 +0800
From:   Art Nikpal <email2tema@...il.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     wim@...ux-watchdog.org, linux@...ck-us.net,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Christian Hewitt <christianshewitt@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-watchdog@...r.kernel.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        linux-kernel@...r.kernel.org, Artem Lapkin <art@...das.com>,
        Nick Xie <nick@...das.com>, Gouwa Wang <gouwa@...das.com>
Subject: Re: [PATCH] watchdog: meson_gxbb_wdt: improve

> Neil
> Can you split the patch in 4 distinct changes ?

yes  no problem i can try to do it tomorrow !
maybe somebody have other ideas, suggestion, comments ...


On Tue, Jun 22, 2021 at 7:08 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> Hi Art,
>
> On 22/06/2021 11:56, Artem Lapkin wrote:
> > Improve meson_gxbb_wdt watchdog driver
> > 1) added module param timeout and nowayout same as other modules
> > 2) print watchdog driver start status
> > 3) add watchdog_stop_on_unregister
> > 4) remove watchdog_stop_on_reboot ( still can be activated by
> > watchdog.stop_on_reboot=1 ) i think this driver configuration more useful
> > becouse we can get reboot waranty for abnormal situations on shutdown stage
>
> Can you split the patch in 4 distinct changes ?
>
> Neil
>
> >
> > Signed-off-by: Artem Lapkin <art@...das.com>
> > ---
> >  drivers/watchdog/meson_gxbb_wdt.c | 20 ++++++++++++++++++--
> >  1 file changed, 18 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c
> > index 5a9ca10fbcfa..15c889932c13 100644
> > --- a/drivers/watchdog/meson_gxbb_wdt.c
> > +++ b/drivers/watchdog/meson_gxbb_wdt.c
> > @@ -35,6 +35,17 @@ struct meson_gxbb_wdt {
> >       struct clk *clk;
> >  };
> >
> > +static bool nowayout = WATCHDOG_NOWAYOUT;
> > +static unsigned int timeout = DEFAULT_TIMEOUT;
> > +
> > +module_param(nowayout, bool, 0);
> > +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started default="
> > +                     __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
> > +
> > +module_param(timeout, uint, 0);
> > +MODULE_PARM_DESC(timeout, "Watchdog heartbeat in seconds="
> > +                     __MODULE_STRING(DEFAULT_TIMEOUT) ")");
> > +
> >  static int meson_gxbb_wdt_start(struct watchdog_device *wdt_dev)
> >  {
> >       struct meson_gxbb_wdt *data = watchdog_get_drvdata(wdt_dev);
> > @@ -174,7 +185,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
> >       data->wdt_dev.ops = &meson_gxbb_wdt_ops;
> >       data->wdt_dev.max_hw_heartbeat_ms = GXBB_WDT_TCNT_SETUP_MASK;
> >       data->wdt_dev.min_timeout = 1;
> > -     data->wdt_dev.timeout = DEFAULT_TIMEOUT;
> > +     data->wdt_dev.timeout = timeout;
> >       watchdog_set_drvdata(&data->wdt_dev, data);
> >
> >       /* Setup with 1ms timebase */
> > @@ -186,7 +197,12 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
> >
> >       meson_gxbb_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);
> >
> > -     watchdog_stop_on_reboot(&data->wdt_dev);
> > +     watchdog_set_nowayout(&data->wdt_dev, nowayout);
> > +     watchdog_stop_on_unregister(&data->wdt_dev);
> > +
> > +     dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)",
> > +             data->wdt_dev.timeout, nowayout);
> > +
> >       return devm_watchdog_register_device(dev, &data->wdt_dev);
> >  }
> >
> >
>