[RFC PATCH 1/3] watchdog: s3c2410: add restart notifier

[Guenter Roeck]

On Tue, Jul 08, 2014 at 04:21:09PM +0200, Tomasz Figa wrote:
> Hi Heiko,
> 
> On 06.07.2014 20:42, Heiko Stübner wrote:
> > On a lot of Samsung systems the watchdog is responsible for restarting the
> > system and until now this code was contained in plat-samsung/watchdog-reset.c .
> > 
> > With the introduction of the restart notifiers, this code can now move into
> > driver itself, removing the need for arch-specific code.
> > 
> > Tested on a S3C2442 based GTA02
> > Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> > ---
> >  drivers/watchdog/s3c2410_wdt.c | 33 +++++++++++++++++++++++++++++++++
> >  1 file changed, 33 insertions(+)
> > 
> > diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
> > index 7c6ccd0..3f89912 100644
> > --- a/drivers/watchdog/s3c2410_wdt.c
> > +++ b/drivers/watchdog/s3c2410_wdt.c
> > @@ -41,6 +41,7 @@
> >  #include <linux/of.h>
> >  #include <linux/mfd/syscon.h>
> >  #include <linux/regmap.h>
> > +#include <linux/reboot.h>
> >  
> >  #define S3C2410_WTCON		0x00
> >  #define S3C2410_WTDAT		0x04
> > @@ -438,6 +439,31 @@ static inline void s3c2410wdt_cpufreq_deregister(struct s3c2410_wdt *wdt)
> >  }
> >  #endif
> >  
> > +static struct s3c2410_wdt *s3c2410wdt_restart_ctx;
> 
> This isn't the most elegant way to store context data. Maybe you could
> embed the notifier_block struct into s3c2410_wdt struct and then use
> container of to retrieve it from s3c2410wdt_restart_notify()?
> 
Excellent idea. I'll do that for the moxart handler as well.

Guenter