Messages in this thread Patch in this message | | | From | Huang Rui <> | Subject | [PATCH v3 11/21] cpufreq: amd: add amd-pstate frequencies attributes | Date | Fri, 29 Oct 2021 21:02:31 +0800 |
| |
Introduce sysfs attributes to get the different level processor frequencies.
Signed-off-by: Huang Rui <ray.huang@amd.com> --- drivers/cpufreq/amd-pstate.c | 63 ++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 9af27ac1f818..8cf1e80f44e0 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -485,6 +485,68 @@ static int amd_pstate_cpu_exit(struct cpufreq_policy *policy) return 0; } +/* Sysfs attributes */ + +/* This frequency is to indicate the maximum hardware frequency. + * If boost is not active but supported, the frequency will be larger than the + * one in cpuinfo. + */ +static ssize_t show_amd_pstate_max_freq(struct cpufreq_policy *policy, + char *buf) +{ + int max_freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + max_freq = amd_get_max_freq(cpudata); + if (max_freq < 0) + return max_freq; + + return sprintf(&buf[0], "%u\n", max_freq); +} + +static ssize_t show_amd_pstate_nominal_freq(struct cpufreq_policy *policy, + char *buf) +{ + int nominal_freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + nominal_freq = amd_get_nominal_freq(cpudata); + if (nominal_freq < 0) + return nominal_freq; + + return sprintf(&buf[0], "%u\n", nominal_freq); +} + +static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *policy, + char *buf) +{ + int freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + freq = amd_get_lowest_nonlinear_freq(cpudata); + if (freq < 0) + return freq; + + return sprintf(&buf[0], "%u\n", freq); +} + +cpufreq_freq_attr_ro(amd_pstate_max_freq); +cpufreq_freq_attr_ro(amd_pstate_nominal_freq); +cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); + +static struct freq_attr *amd_pstate_attr[] = { + &amd_pstate_max_freq, + &amd_pstate_nominal_freq, + &amd_pstate_lowest_nonlinear_freq, + NULL, +}; + static struct cpufreq_driver amd_pstate_driver = { .flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS, .verify = amd_pstate_verify, @@ -493,6 +555,7 @@ static struct cpufreq_driver amd_pstate_driver = { .exit = amd_pstate_cpu_exit, .set_boost = amd_pstate_set_boost, .name = "amd-pstate", + .attr = amd_pstate_attr, }; static int __init amd_pstate_init(void) -- 2.25.1
| |