On Tue, March 20, 2012 10:45 pm, Turquette, Mike wrote:

IIRC, that discussion was with respect to the .parent member of struct
clk.  It was decided that having .parent = NULL does not imply that a
clock is a root clock, but instead we rely on the CLK_IS_ROOT flag.  I
can't think of any other instance where a NULL clk when returned from
a registration function would be useful.

I wasn't referring to a discussion with regards to this patch series. I'm
referring to what I believe was a discussion with Russell King on whether
a NULL from clk_get() should be considered a clock and whether it should
be usable as a "clock" with the clock APIs. That's the reason clk_get()
returns -ENOENT instead of NULL.

-Saravana

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