linux-kernel - Re: [PATCH v2] pinctrl: qcom: use restart_notifier mechanism for ps

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Message-ID: <CACRpkdZQ25_Rzr0whL50NPk+sw2miisuxfwLyiw_afRb8FacSQ@mail.gmail.com>
Date:	Fri, 26 Sep 2014 10:37:39 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Josh Cartwright <joshc@...eaurora.org>
Cc:	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH v2] pinctrl: qcom: use restart_notifier mechanism for ps_hold

On Tue, Sep 23, 2014 at 10:59 PM, Josh Cartwright <joshc@...eaurora.org> 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.
>
> Since this mechanism may be one of several mechanisms registered, change
> the post-ps_hold write timeout to be a more reasonable 1 second instead
> of 10 seconds.
>
> Choose priority 128, as according to documentation, this mechanism "is
> sufficient to restart the entire system".
>
> Cc: Pramod Gurav <pramod.gurav@...rtplayin.com>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Tested-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
> Signed-off-by: Josh Cartwright <joshc@...eaurora.org>
> ---
>
> Changes since v1:
>   - Simplified conditional notifier block registration
>   - Reduced wait time to 1s, which I've found to be sufficient on an IFC6410
>     board.

Patch applied with ACKs.

Yours,
Linus Walleij
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