Message-ID: <87oa0w77dw.wl%kuninori.morimoto.gx@renesas.com>
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
To: Stephen Boyd <sboyd@codeaurora.org>
CC: Rob Herring <robh@kernel.org>,
        Linux-ALSA <alsa-devel@alsa-project.org>,
        Linux-DT <devicetree@vger.kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Russell King <linux@armlinux.org.uk>,
        Linux-Kernel <linux-kernel@vger.kernel.org>,
        Mark Brown <broonie@kernel.org>, <linux-clk@vger.kernel.org>,
        Linux-ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [alsa-devel] [PATCH v2] clkdev: add devm_of_clk_get()
In-Reply-To: <874m2pbwsn.wl%kuninori.morimoto.gx@renesas.com>
References: <87ziptixv7.wl%kuninori.morimoto.gx@renesas.com>
        <20160707122636.GP1041@n2100.armlinux.org.uk>
        <8760shgfzu.wl%kuninori.morimoto.gx@renesas.com>
        <146794140875.73491.7115209079607438738@resonance>
        <871t34hlin.wl%kuninori.morimoto.gx@renesas.com>
        <878twndi54.wl%kuninori.morimoto.gx@renesas.com>
        <8737isvwc6.wl%kuninori.morimoto.gx@renesas.com>
        <20161123191037.GE25626@codeaurora.org>
        <87a8cpejn5.wl%kuninori.morimoto.gx@renesas.com>
        <87y409cw71.wl%kuninori.morimoto.gx@renesas.com>
        <20161129210556.GC6095@codeaurora.org>
        <874m2pbwsn.wl%kuninori.morimoto.gx@renesas.com>
User-Agent: Wanderlust/2.15.9 Emacs/24.3 Mule/6.0
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset="US-ASCII"
Date: Thu, 1 Dec 2016 01:43:03 +0000
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Dec 2016 01:43:03.4797 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SG2PR0601MB1453
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 1123
Lines: 52


Hi Stephen, again

Can I confirm ??
Was I misunderstanding ??

> I understand your point, but I think devm_get_clk_from_child()
> needs new DT setings, and it can't keep compatibility, or
> it makes driver complex.
> I think it is nice to have. but, I want to keep current style.
> Thus, I will try to use current of_clk_get() as-is, and
> call clk_free() somehow in this driver.

	------ Pattern1 -----------
	sound_soc {
		clocks = <&xxx>, <&xxx>;
		clock-names = "cpu", "codec";
		...
		cpu { /* of_cpu_node */
			...
		};
		codec { /* of_codec_node */
			...
		};
	};
	----------------------------

Do you mean, this case we can use

	devm_get_clk_from_child(dev, of_cpu_node,   "cpu");
	devm_get_clk_from_child(dev, of_codec_node, "codec");

	------ Pattern2 -----------
	sound_soc {
		...
		cpu { /* of_cpu_node */
			clocks = <&xxx>;
			...
		};
		codec { /* of_codec_node */
			clocks = <&xxx>;
			...
		};
	};
	----------------------------

And, this case, we can use

	devm_get_clk_from_child(dev, of_cpu_node,   NULL);
	devm_get_clk_from_child(dev, of_codec_node, NULL);

If so, I can use it without DT change.