linux-kernel - Re: [alsa-devel] [PATCH] ASoC: cs42888: Add codec driver support

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Message-ID: <CAOMZO5B8J-Fsv6BkeAQAneu1yf6vC-tV74VB-D6JPA1PPjd99Q@mail.gmail.com>
Date:	Tue, 25 Feb 2014 00:54:04 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Nicolin Chen <Guangyu.Chen@...escale.com>
Cc:	Mark Brown <broonie@...nel.org>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Austin, Brian" <Brian.Austin@...rus.com>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	"Handrigan, Paul" <Paul.Handrigan@...rus.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"rob@...dley.net" <rob@...dley.net>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: cs42888: Add codec driver support

Hi Nicolin,

On Tue, Feb 25, 2014 at 12:46 AM, Nicolin Chen
<Guangyu.Chen@...escale.com> wrote:
>> So register it from the ESAI driver then.
>
> Then I think I need to find a way to pass the clock to CODEC driver...

Does this example from mxs-saif help?

commit 7c9e6150f2e7cbd60e0bc9a19118ca1dc97d2780
Author: Shawn Guo <shawn.guo@...aro.org>
Date:   Mon Jul 1 16:16:10 2013 +0800

    ASoC: mxs: register saif mclk to clock framework

    Mostly the mxs system design uses saif0 mclk output as the clock source
    of codec.  Since the mclk is implemented as a general divider with the
    saif clk as the parent clock, let's register the mclk as a basic
    clk-divider to common clock framework.  Then with it being a clock
    provdier, clk_get() call in codec driver probe function will just work.

    Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
    Signed-off-by: Mark Brown <broonie@...aro.org>
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