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cpufreq: tegra: update comment for clarity

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Tegra's driver got updated a bit (00917dd cpufreq: Tegra: implement intermediate
frequency callbacks) and implements new 'intermediate freq' infrastructure of
core. Above commit updated comments about when to call
clk_prepare_enable(pll_x_clk) and Doug wasn't satisfied with those comments and
said this:

> The "Though when target-freq is intermediate freq, we don't need to
> take this reference." makes me think that this function is actually
> called when target-freq is intermediate freq.  I don't think it is,
> right?

For better clarity just make that comment more explicit about when we call
tegra_target_intermediate().

Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reported-and-reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2014-06-10 10:27:12 +05:30 committed by Rafael J. Wysocki
parent 830bcac4e4
commit 40cc549013
1 changed files with 6 additions and 3 deletions
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9
drivers/cpufreq/tegra-cpufreq.c
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@ -71,9 +71,12 @@ static int tegra_target_intermediate(struct cpufreq_policy *policy,
/*
* Take an extra reference to the main pll so it doesn't turn
* off when we move the cpu off of it as enabling it again while we
* switch to it from tegra_target() would take additional time. Though
* when target-freq is intermediate freq, we don't need to take this
* reference.
* switch to it from tegra_target() would take additional time.
*
* When target-freq is equal to intermediate freq we don't need to
* switch to an intermediate freq and so this routine isn't called.
* Also, we wouldn't be using pll_x anymore and must not take extra
* reference to it, as it can be disabled now to save some power.
*/
clk_prepare_enable(pll_x_clk);