[PATCH v3 5/5] clk: export tree topology and clk data via sysfs
mturquette at ti.com
Tue Nov 22 20:19:51 UTC 2011
On Tue, Nov 22, 2011 at 12:02 PM, Arnd Bergmann <arnd at arndb.de> wrote:
> On Tuesday 22 November 2011 12:19:51 Grant Likely wrote:
>> On Tue, Nov 22, 2011 at 11:01 AM, Mike Turquette <mturquette at linaro.org> wrote:
>> > Others have requested to have knobs made available for actually
>> > performing clk_enable/clk_disable and even clk_set_rate from
>> > userspace. I hate this idea and won't implement it. I encourage
>> > anyone that needs this to do it in debugfs.
>> > Does that work-split make sense to you, or do you still not like the
>> > idea of having topology and read-only info in sysfs?
>> Unless there is a solid real-world use case for exporting this data to
>> userspace, I do not think sysfs is a good idea. As long as the usage
>> (beyond debug) is theoretical I think the whole thing should be in
>> debugfs. It can always be moved at a later date If a real use case
>> does become important.
> I would recomment not to spend any time on implementing a debugfs interface
> for this right now. As far as I can tell, nothing relies on exporting
> the structure to user space, so Mike's time is better spent on getting the
> other four patches merged.
Seems to be some consensus on this. Will drop userspace-visible clk
tree from V4 patchset.
> Note that the static topology information about clocks will already be
> visible in /proc/devicetree when that is enabled and the clocks are
> described in the .dts file.
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