diff options
| author | Beata Michalska <beata.michalska@arm.com> | 2025-01-31 16:24:36 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-02-17 18:09:20 +0000 |
| commit | 38e480d4fcac2e191e2f24f381aa8957865c49b2 (patch) | |
| tree | 3576ed5a036e86f398d97dae82dc0847291d6b76 /drivers/cpufreq/cpufreq.c | |
| parent | 004b500a9031973ba0d05edca860193f9a5938df (diff) | |
cpufreq: Allow arch_freq_get_on_cpu to return an error
Allow arch_freq_get_on_cpu to return an error for cases when retrieving
current CPU frequency is not possible, whether that being due to lack of
required arch support or due to other circumstances when the current
frequency cannot be determined at given point of time.
Signed-off-by: Beata Michalska <beata.michalska@arm.com>
Reviewed-by: Prasanna Kumar T S M <ptsm@linux.microsoft.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20250131162439.3843071-2-beata.michalska@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 30ffbddc7ece..e69b0e39654c 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -729,18 +729,18 @@ show_one(cpuinfo_transition_latency, cpuinfo.transition_latency); show_one(scaling_min_freq, min); show_one(scaling_max_freq, max); -__weak unsigned int arch_freq_get_on_cpu(int cpu) +__weak int arch_freq_get_on_cpu(int cpu) { - return 0; + return -EOPNOTSUPP; } static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf) { ssize_t ret; - unsigned int freq; + int freq; freq = arch_freq_get_on_cpu(policy->cpu); - if (freq) + if (freq > 0) ret = sysfs_emit(buf, "%u\n", freq); else if (cpufreq_driver->setpolicy && cpufreq_driver->get) ret = sysfs_emit(buf, "%u\n", cpufreq_driver->get(policy->cpu)); |