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

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Message-Id: <201111221307.14942.arnd.bergmann@linaro.org>
Date:	Tue, 22 Nov 2011 13:07:14 +0000
From:	Arnd Bergmann <arnd.bergmann@...aro.org>
To:	Mike Turquette <mturquette@...com>
Cc:	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, Mike Turquette <mturquette@...aro.org>,
	"Greg Kroah-Hartman" <gregkh@...e.de>
Subject: Re: [PATCH v3 5/5] clk: export tree topology and clk data via sysfs

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.

> +static struct kobject *clk_kobj;
> +LIST_HEAD(kobj_list);

The list head should be static.

	Arnd
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