linux-kernel - Re: [PATCH 0/2] cpufreq/regulator: Handle regulators that defer probe with device tree bindings

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Message-ID: <CAKohpokiLQNp3JffxuKA5JxeL8+F3-2MK_cMv2FzcddOejQA=Q@mail.gmail.com>
Date:	Fri, 5 Apr 2013 10:43:07 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Nishanth Menon <nm@...com>
Cc:	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Shawn Guo <shawn.guo@...aro.org>
Subject: Re: [PATCH 0/2] cpufreq/regulator: Handle regulators that defer probe
 with device tree bindings

On 5 April 2013 09:51, Nishanth Menon <nm@...com> wrote:
> Currently get_regulator returns -EPROBE_DEFER in the case of regulator supply
> which have no device tree node or even if regulator which are depicted in device
> tree node is defering it's registration for valid reasons.
>
> This makes it impossible to use an regulator that registers itself after
> cpufreq-cpu0 probe is complete. The reason for the same is regulator framework
> fails to return appropriate error value when device tree binding is not actually
> present as a node.
>
> Once we fix that, we can then fix cpufreq-cpu0 to make intelligent decisions
> based on return value.
>
> Nishanth Menon (2):
>   regulator: core: return err value for regulator_get if there is no DT
>     binding
>   cpufreq: cpufreq-cpu0: defer probe when regulator is not ready
>
>  drivers/cpufreq/cpufreq-cpu0.c |   20 ++++++++++++++------
>  drivers/regulator/core.c       |    4 ++--
>  2 files changed, 16 insertions(+), 8 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
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