On Thu, Sep 18, 2014 at 07:54:18PM -0700, Guenter Roeck wrote:
> On 09/18/2014 03:32 PM, Josh Cartwright wrote:
> >By converting to the restart_notifier mechanism for restart, we allow
> >for other mechanisms, like the watchdog, to be used for restart in the
> >case where PS_HOLD has failed to reset the chip.
> >
> >Choose priority 128, as according to documentation, this mechanism "is
> >sufficient to restart the entire system".
> >
> >Cc: Pramod Gurav <pramod.gurav@xxxxxxxxxxxxxxx>
> >Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
> >Signed-off-by: Josh Cartwright <joshc@xxxxxxxxxxxxxx>
> >---
[..]
> >
> >-#ifdef CONFIG_ARM
>
> Unrelated to this patch, but is this going to be executed (and potentially used)
> on any non-arm architectures ?
No. Not for now. The only other conceivable platform that could make
use of this would be hexagon, but I think there would be other hurdles
to getting this driver working before even tackling the restart handler.
[..]
> >+static int msm_ps_hold_restart(struct notifier_block *nb, unsigned long action,
> >+ void *data)
> > {
> >- writel(0, msm_ps_hold);
> >+ struct msm_pinctrl *pctrl = container_of(nb, struct msm_pinctrl, restart_nb);
> >+
> >+ writel(0, pctrl->regs + PS_HOLD_OFFSET);
> > mdelay(10000);
>
> Sure you still want to wait for 10 seconds here ?
> Would it make sense to choose a more reasonable timeout ?
Yeah, 10s is a bit extreme. I don't quite know what a reasonable
timeout is, so I'll do some rough measurements, and shorten it down in
v2.
Thanks again,
Josh
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