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cpufreq: scmi: Set transition_delay_us

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Make use of the newly added callbacks:
- rate_limit_get()
- fast_switch_rate_limit()
to populate policies's `transition_delay_us`, defined as the
'Preferred average time interval between consecutive
invocations of the driver to set the frequency for this policy.'

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Pierre Gondois 2024-02-22 14:57:01 +01:00 committed by Viresh Kumar
parent 2441caa84a
commit ad2a91086e
1 changed files with 26 additions and 0 deletions
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26
drivers/cpufreq/scmi-cpufreq.c
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@ -144,6 +144,29 @@ scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power,
return 0;
}
static int
scmi_get_rate_limit(u32 domain, bool has_fast_switch)
{
int ret, rate_limit;
if (has_fast_switch) {
/*
* Fast channels are used whenever available,
* so use their rate_limit value if populated.
*/
ret = perf_ops->fast_switch_rate_limit(ph, domain,
&rate_limit);
if (!ret && rate_limit)
return rate_limit;
}
ret = perf_ops->rate_limit_get(ph, domain, &rate_limit);
if (ret)
return 0;
return rate_limit;
}
static int scmi_cpufreq_init(struct cpufreq_policy *policy)
{
int ret, nr_opp, domain;
@ -250,6 +273,9 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
policy->fast_switch_possible =
perf_ops->fast_switch_possible(ph, domain);
policy->transition_delay_us =
scmi_get_rate_limit(domain, policy->fast_switch_possible);
return 0;
out_free_opp: