linux-kernel - Re: [PATCH 1/3] clkdev: add devm_get_clk_from

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Message-ID: <20161209203127.GR14217@n2100.armlinux.org.uk>
Date:   Fri, 9 Dec 2016 20:31:27 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Stephen Boyd <sboyd@...eaurora.org>, 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 1/3] clkdev: add devm_get_clk_from_child()

On Mon, Dec 05, 2016 at 05:23:20AM +0000, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> 
> Some driver is using this type of DT bindings for clock (more detail,
> see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt).
> 
> 	sound_soc {
> 		...
> 		cpu {
> 			clocks = <&xxx>;
> 			...
> 		};
> 		codec {
> 			clocks = <&xxx>;
> 			...
> 		};
> 	};
> 
> Current driver in this case uses of_clk_get() for each node, but there
> is no devm_of_clk_get() today.
> OTOH, the problem of having devm_of_clk_get() is that it encourages the
> use of of_clk_get() when clk_get() is more desirable.
> 
> Thus, this patch adds new devm_get_clk_from_chile() which explicitly
> reads as get a clock from a child node of this device.
> By this function, we can also use this type of DT bindings
> 
> 	sound_soc {
> 		clocks = <&xxx>, <&xxx>;
> 		clock-names = "cpu", "codec";
> 		...
> 		cpu {
> 			...
> 		};
> 		codec {
> 			...
> 		};
> 	};
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

This looks lots better, thanks.

Acked-by: Russell King <rmk+kernel@...linux.org.uk>

-- 
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