linux-kernel - Re: [PATCH v3 5/5] clk: export tree topology and clk data via sysfs

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Message-ID: <CAPtuhTiVR6NQfgH6-JGd6EC68bdOb6JwDKqaiswS8YR3sNt-Vg@mail.gmail.com>
Date:	Tue, 22 Nov 2011 09:42:58 -0800
From:	Mike Turquette <mturquette@...aro.org>
To:	Arnd Bergmann <arnd.bergmann@...aro.org>
Cc:	Mike Turquette <mturquette@...com>, linux@....linux.org.uk,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, jeremy.kerr@...onical.com,
	broonie@...nsource.wolfsonmicro.com, tglx@...utronix.de,
	linus.walleij@...ricsson.com, amit.kucheria@...aro.org,
	dsaxena@...aro.org, patches@...aro.org,
	linaro-dev@...ts.linaro.org, aul@...an.com,
	grant.likely@...retlab.ca, sboyd@...cinc.com,
	shawn.guo@...escale.com, skannan@...cinc.com,
	magnus.damm@...il.com, eric.miao@...aro.org,
	richard.zhao@...aro.org, Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [PATCH v3 5/5] clk: export tree topology and clk data via sysfs

On Tue, Nov 22, 2011 at 5:07 AM, Arnd Bergmann <arnd.bergmann@...aro.org> wrote:
> On Tuesday 22 November 2011, Mike Turquette wrote:
>> Introduces kobject support for the common struct clk, exports per-clk
>> data via read-only callbacks and models the clk tree topology in sysfs.
>>
>> Also adds support for generating the clk tree in clk_init and migrating
>> nodes when input sources are switches in clk_set_parent.
>>
>> Signed-off-by: Mike Turquette <mturquette@...aro.org>
>> ---
>>  drivers/clk/Kconfig     |   10 +++
>>  drivers/clk/Makefile    |    1 +
>>  drivers/clk/clk-sysfs.c |  199 +++++++++++++++++++++++++++++++++++++++++++++++
>>  drivers/clk/clk.c       |    5 +-
>>  include/linux/clk.h     |   36 ++++++++-
>>  5 files changed, 248 insertions(+), 3 deletions(-)
>>  create mode 100644 drivers/clk/clk-sysfs.c
>
> Since this introduces a new top-level hierarchy in sysfs, it certainly needs
> to be reviewed by Greg K-H (on Cc now). Also, you have to add a proper
> documentation for every new node and attribute in Documentation/ABI along
> with the code.

I don't intend to keep it in the top-level /sys/ directory.  I
mentioned that in the coverletter, but not here.  I wasn't sure where
to put it, and I knew reviewers would be happy to point the right
place out to me.

>> +static struct kobject *clk_kobj;
>> +LIST_HEAD(kobj_list);
>
> The list head should be static.

Will put into V4.

Thanks,
Mike

>
>        Arnd
>
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