Thread (68 messages) 68 messages, 4 authors, 2016-01-25

Re: [PATCH 17/17] cpufreq: dt: No need to allocate resources anymore

From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2016-01-25 10:33:19

On 11-01-16, 18:20, Stephen Boyd wrote:
quoted
@@ -241,9 +234,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
 	}
 
 	priv->cpu_dev = cpu_dev;
-	priv->cpu_reg = cpu_reg;
 	policy->driver_data = priv;
-
 	policy->clk = cpu_clk;
Maybe we can have an dev_pm_opp_get_rate() API and a
cpufreq_generic_opp_get() so we can get rid of policy->clk usage
in this driver?
I thought about this today and couldn't get to a sane solution.
If we implement dev_pm_opp_get_rate(), then it should return the
cached value of the currently programmed OPP. If the OPP isn't set
yet, it can call clk_get_rate() and return that instead. But it
doesn't make any sense to always call clk_get_rate() from
dev_pm_opp_get_rate(), as that doesn't match its name.

OTOH, cpufreq really really needs a clk_get_rate() to happen, there
can be cases where the clk is changed by some other entity, specially
during suspend/resume and there are special checks in cpufreq about
that.

We can surely add a patch later if we get answer to this, but for now,
I will keep this patch as is.

-- 
viresh
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