On 12/10/2013 11:51 PM, Sascha Hauer wrote:
On Mon, Dec 09, 2013 at 06:00:12PM -0800, Paul Walmsley wrote:
Treat both negative and zero return values from clk_round_rate() as
errors. This is needed since subsequent patches will convert
clk_round_rate()'s return value to be an unsigned type, rather than a
signed type, since some clock sources can generate rates higher than
(2^31)-1 Hz.
Eventually, when calling clk_round_rate(), only a return value of zero
will be considered a error. All other values will be considered valid
rates. The comparison against values less than 0 is kept to preserve
the correct behavior in the meantime.
Shouldn't it be an error when the result is not within sensible limits
instead? What do you do with a rate of 1Hz?
It's up to the caller of clk_round_rate() to decide what doesn't make
sense for its use-case. The caller can certainly react to non-zero
rates as it likes.
The 0 return code (and the previous negative return values that were
used previously) are just intended for the clock framework to signal
explicit errors encountered during clk_round_rate()'s execution.
- Paul
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