linux-kernel - Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090 codec

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Date:	Thu, 16 Jul 2015 18:08:35 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	zhengxing <zhengxing@...k-chips.com>, dgreid@...omium.org,
	dianders@...omium.org, heiko@...ech.de, sonnyrao@...omium.org,
	linux-rockchip@...ts.infradead.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090
 codec

Hi Gerry,

On do, 2015-07-16 at 23:25 +0800, Jiang Liu wrote:
> May be that is hidden in some device tree files.
> MODULE_ALIAS() is used by a driver to announce that it supports
> such types of devices. And bus enumerator will create those
> devices by probing hardware or parsing some configuration files.

Then someone could simply point me to the device tree file where that
"platform:" alias comes from. (Note that I, of course, do check the tree
for the substrings involved before tossing questions like these onto
lkml.)

Besides, as far as I can tell, for device tree support the magic
actually hides in
    MODULE_DEVICE_TABLE(of, rockchip_max98090_of_match);

Which, I think, implies that any MODULE_ALIAS("platform:[...]") is
pointless for systems booting with device tree support.

Thanks,


Paul Bolle
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