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| author |  Pierre Gondois <pierre.gondois@arm.com>
| 2024-02-22 14:57:01 +0100 |
|---|---|---|
| committer |  Viresh Kumar <viresh.kumar@linaro.org>
| 2024-03-06 10:54:24 +0530 |
| commit | ad2a91086e288c9ab1d74eee57edabe08bd90471 (patch) | |
| tree | fede8296497fbbaef1ea2394fd767f4003b3fc3f /drivers/cpufreq/scmi-cpufreq.c | |
| parent | firmware: arm_scmi: Populate fast channel rate_limit (diff) | |
| download | linux-ad2a91086e288c9ab1d74eee57edabe08bd90471.tar.gz linux-ad2a91086e288c9ab1d74eee57edabe08bd90471.tar.bz2 linux-ad2a91086e288c9ab1d74eee57edabe08bd90471.zip | |
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: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/scmi-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/scmi-cpufreq.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 4ee23f4ebf4a..0b483bd0d3ca 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -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: |