RE: [PATCH 1/1] OMAP3:WDT:Enable clk in probe, trigger timer reload

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> -----Original Message-----
> From: Premi, Sanjeev
> Sent: Tuesday, June 16, 2009 8:01 AM
> To: Hugo Vincent; Kevin Hilman
> Cc: Hald, Ulrik Bech; linux-omap@xxxxxxxxxxxxxxx
> Subject: RE: [PATCH 1/1] OMAP3:WDT:Enable clk in probe, trigger timer
> reload
> 
> > -----Original Message-----
> > From: linux-omap-owner@xxxxxxxxxxxxxxx
> > [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Hugo Vincent
> > Sent: Saturday, June 13, 2009 9:28 AM
> > To: Kevin Hilman
> > Cc: Hald, Ulrik Bech; linux-omap@xxxxxxxxxxxxxxx
> > Subject: Re: [PATCH 1/1] OMAP3:WDT:Enable clk in probe,
> > trigger timer reload
> >
> > On Sat, Jun 13, 2009 at 4:13 AM, Kevin
> > Hilman<khilman@xxxxxxxxxxxxxxxxxxx> wrote:
> > > Ulrik Bech Hald <ubh@xxxxxx> writes:
> > >
> > >> This patch contains two bugfixes:
> > >>
> > >> 1)In omap_wdt_probe() the watchdog is reset and disabled. This
> > >> requires register access and the clks needs to be enabled
> > temporarily
> > >>
> > >> 2)In omap_wdt_open() the timer register needs to be reloaded
> > >> to trigger a new timer value (the default of 60s)
> > >>
> > >> Signed-off-by: Ulrik Bech Hald <ubh@xxxxxx>
> > >
> > > Can you change the subject slightly to something like:
> > >
> > >  watchdog: OMAP fixes: enable clock in probe, trigger timer reload
> > >
> > > Also add which OMAP platforms you have tested on since this affects
> > > OMAP2, OMAP3 and presuably OMAP4.
> >
> > Tested on OMAP3 (OMAP3503, Gumstix Overo).
> >
> > > After that, you can add
> > >
> > > Reviewed-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxxxxx>
> > >
> > > And sent to watchdog maintiner, and CC linux-omap, here's
> > excerpt from
> > > MAINTAINERS:
> > >
> > > WATCHDOG DEVICE DRIVERS
> > > P:      Wim Van Sebroeck
> > > M:      wim@xxxxxxxxx
> > > T:      git
> > git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-wa
> tchdog.git
> > > S:      Maintained
> > > F:      Documentation/watchdog/
> > > F:      drivers/watchdog/
> > > F:      include/linux/watchdog.h
> > >
> > >> ---
> > >>  drivers/watchdog/omap_wdt.c |    7 +++++++
> > >>  1 files changed, 7 insertions(+), 0 deletions(-)
> > >>  mode change 100644 => 100755 drivers/watchdog/omap_wdt.c
> > >>
> > >> diff --git a/drivers/watchdog/omap_wdt.c
> > b/drivers/watchdog/omap_wdt.c
> 
> > >> old mode 100644
> > >> new mode 100755
> 
> This change is also unnecessary.
> Can be avoided in the follow-up submission.
> 
> ~sanjeev
Thanks for pointing it out Sanjeev. I am submitting a version 3 with the correction now.

/Ulrik

> 
> > >> index f271385..3ed571a
> > >> --- a/drivers/watchdog/omap_wdt.c
> > >> +++ b/drivers/watchdog/omap_wdt.c
> > >> @@ -159,6 +159,7 @@ static int omap_wdt_open(struct inode
> > *inode, struct file *file)
> > >>       file->private_data = (void *) wdev;
> > >>
> > >>       omap_wdt_set_timeout(wdev);
> > >> +     omap_wdt_ping(wdev); /* trigger loading of new
> > timeout value */
> > >>       omap_wdt_enable(wdev);
> > >>
> > >>       return nonseekable_open(inode, file);
> > >> @@ -313,6 +314,9 @@ static int __devinit
> > omap_wdt_probe(struct platform_device *pdev)
> > >>
> > >>       platform_set_drvdata(pdev, wdev);
> > >>
> > >> +     clk_enable(wdev->ick);
> > >> +     clk_enable(wdev->fck);
> > >> +
> > >>       omap_wdt_disable(wdev);
> > >>       omap_wdt_adjust_timeout(timer_margin);
> > >>
> > >> @@ -332,6 +336,9 @@ static int __devinit
> > omap_wdt_probe(struct platform_device *pdev)
> > >>       /* autogate OCP interface clock */
> > >>       __raw_writel(0x01, wdev->base + OMAP_WATCHDOG_SYS_CONFIG);
> > >>
> > >> +     clk_disable(wdev->ick);
> > >> +     clk_disable(wdev->fck);
> > >> +
> > >>       omap_wdt_dev = pdev;
> > >>
> > >>       return 0;
> > >> --
> > >> 1.5.4.3
> > >>
> > >> --
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