Commit ad2a9108 authored by Pierre Gondois's avatar Pierre Gondois Committed by Viresh Kumar
Browse files

cpufreq: scmi: Set transition_delay_us 



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: default avatarPierre Gondois <pierre.gondois@arm.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 2441caa8

drivers/cpufreq/scmi-cpufreq.c

+26 −0
Original line number Diff line number Diff line
@@ -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: