[PATCH] clk: debug clock tree

On 12/13/2012 09:27 AM, Mike Turquette wrote:

On Wed, Dec 12, 2012 at 7:49 PM, Prashant Gaikwad [off-list ref] wrote:

quoted

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.

quoted

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