parse traces from the common clock infrastructure

[kdub]

Traces from clock_set_rate, clock_enable, clock_disable need
specialized parsing. Add additional feature to parse these traces.

Test: run the 3 new unit tests (nosetests tests/test_common_clk.py)

Change-Id: Ib93b72697fc4d5eb30cffb914bbe0cb4c4cd872d

[bjackman]

Could you squash the two commits together? That way we don't break git bisect by having a commit where the tests fail.

[bjackman]

You can just write this as

"""
Definitions of common_clk (CONFIG_COMMON_CLK) trace parsers
registered by the FTrace class
"""

[bjackman]

I think you can simplify this: if you add an intermediate common class then you only need to write generate_data_dict once. And then you can actually move the parse_common_clock_data inside that method. Something like this (untested):

class CommonClkBase(Base):
    def generate_data_dict(self, data_str):
        #clock traces are of the form "clk_name field0=x field1=y ..."
        clk_name, fields = data_str.split(' ', 1)
        ret = super(CommonClkBase, self).generate_data_dict(fields)
        ret['clk_name'] = clk_name
        return ret

[kdub]

@bjackman Thanks for the review, adopted all suggestions

[bjackman]

Welcome aboard 😁

[joelagnel]

Awesome. :):)