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

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Date:   Fri, 9 Dec 2016 00:21:58 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Stephen Boyd <sboyd@...eaurora.org>
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


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 itself is not wrong (?)