linux-kernel - Re: [PATCH 3/3] ASoC: simple-card-utils: enable clocks/clock-names/clock-ranges

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Message-ID: <20161209002635.GD5423@codeaurora.org>
Date:   Thu, 8 Dec 2016 16:26:35 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Rob Herring <robh@...nel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Linux-DT <devicetree@...r.kernel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Linux-Kernel <linux-kernel@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>, linux-clk@...r.kernel.org,
        Linux-ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 3/3] ASoC: simple-card-utils: enable
 clocks/clock-names/clock-ranges

On 12/09, Kuninori Morimoto wrote:
> 
> Hi Stephen
> 
> > > From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> > > 
> > > Current simple-card is supporting this style for clocks
> > > 
> > > 	sound {
> > > 		...
> > > 		simple-audio-card,cpu {
> > > 			sound-dai = <&xxx>;
> > > 			clocks = <&cpu_clock>;
> > > 		};
> > > 		simple-audio-card,codec {
> > > 			sound-dai = <&xxx>;
> > > 			clocks = <&codec_clock>;
> > > 		};
> > > 	};
> > > 
> > > Now, it can support this style too, because we can use
> > > devm_get_clk_from_child() now.
> > > 
> > > 	sound {
> > > 		...
> > > 		clocks = <&cpu_clock>, <&codec_clock>;
> > > 		clock-names = "cpu", "codec";
> > > 		clock-ranges;
> > > 		...
> > > 		simple-audio-card,cpu {
> > > 			sound-dai = <&xxx>;
> > > 		};
> > > 		simple-audio-card,codec {
> > > 			sound-dai = <&xxx>;
> > > 		};
> > > 	};
> > > 
> > > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> > 
> > I don't see any reason why we need this patch though. The binding
> > works as is, so supporting different styles doesn't seem like a
> > good idea to me. Let's just keep what we have? Even if a sub-node
> > like cpu or codec gets more than one element in the clocks list
> > property, we can make that work by passing a clock-name then
> > based on some sort of other knowledge.
> 
> OK, thanks. Let's skip this patch.
> But I believe this idea/method itself is not wrong (?)
> 

Right it's not wrong, just seems confusing to have two methods.

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