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SubjectRe: [PATCH] clk: debug clock tree
On Monday 24 December 2012 11:07 PM, Mike Turquette wrote:
> On Sun, Dec 23, 2012 at 4:26 AM, Prashant Gaikwad <pgaikwad@nvidia.com> wrote:
>> On Saturday 22 December 2012 04:26 AM, Mike Turquette wrote:
>>> On Wed, Dec 19, 2012 at 11:53 PM, Prashant Gaikwad <pgaikwad@nvidia.com>
>>> wrote:
>>>> On Thursday 13 December 2012 11:31 PM, Stephen Warren wrote:
>>>>> On 12/13/2012 09:27 AM, Mike Turquette wrote:
>>>>>> On Wed, Dec 12, 2012 at 7:49 PM, Prashant Gaikwad <pgaikwad@nvidia.com>
>>>>>> wrote:
>>>>>>> Adds debug file "clock_tree" in /sys/kernel/debug/clk dir.
>>>>>>> It helps to view all the clock registered in tree format.
>>>>>>>
>>>>>> Prashant,
>>>>>>
>>>>>> Thanks for submitting this. We've been talking about having a single
>>>>>> file for representing the tree for some time.
>>>>>>
>>>>>> Regarding the output format had you considered using a well known
>>>>>> format which can be parsed using well known parsing libs? This avoids
>>>>>> needing a custom parser just for this one file. JSON springs to mind
>>>>>> as something lightweight and well-understood.
>>>>> One advantage of the format below is that it's very easily
>>>>> human-readable, and it's not too hard to parse (although I guess you'd
>>>>> have to parse the indent level to get parent/child relation, which would
>>>>> suck a bit). Is there room to provide both? Otherwise, I guess the
>>>>> kernel could include a script to convert from JSON/whatever into the
>>>>> format below.
>>>>>
>>>>>>> For example:
>>>>>>> clock enable_cnt prepare_cnt rate
>>>>>>> ---------------------------------------------------------------------
>>>>>>> i2s0_sync 0 0 24000000
>>>>>>> spdif_in_sync 0 0 24000000
>>>>>>> spdif_mux 0 0 24000000
>>>>>>> spdif 0 0 24000000
>>>>>>> spdif_doubler 0 0 48000000
>>>>>>> spdif_div 0 0 48000000
>>>>>>> spdif_2x 0 0 48000000
>>>>>
>>>> Even I think that output must be easily human-readable. How about adding
>>>> sysfs to switch between human-readable and machine-readable format?
>>>> I will try come up with a implementation.
>>>>
>>> Do you mean a sysfs file which controls the output format? How about
>>> just two different files? One can be clk-dump (machine readable) and
>>> the other is clk-summary (human readable).
>>
>> It is also fine. Is this patch ok for human-readable format? or any
>> suggestions?
>> I will change the file name to clk-summary.
>>
> Prashant,
>
> Yes the format seems to be agreeable for human-readable format based
> on the feedback on the list. Go ahead and keep the column titles and
> the dashed lines that I commented on earlier... my comments are less
> relevant if a separate machine-readable clk-dump file exists.

Thanks Mike!!

> Are you going to take a crack at JSON-formatted output for clk-dump?

I will work on it.

> Thanks,
> Mike
>
>>> Regards,
>>> Mike
>>



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