[PATCH 10/19] cpufreq: amd: add amd-pstate frequencies attributes
From: Huang Rui <ray.huang@amd.com>
Date: 2021-09-08 15:01:50
Also in:
lkml
Subsystem:
amd pstate driver, cpu frequency scaling framework, the rest · Maintainers:
Huang Rui, Mario Limonciello, "Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
Introduce sysfs attributes to get the different level processor frequencies. Signed-off-by: Huang Rui <ray.huang@amd.com> --- drivers/cpufreq/amd-pstate.c | 80 +++++++++++++++++++++++++++++++++++- 1 file changed, 79 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 48dedd5af101..3c727a22cb69 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c@@ -577,16 +577,94 @@ static int amd_pstate_cpu_exit(struct cpufreq_policy *policy) return 0; } -static ssize_t show_is_amd_pstate_enabled(struct cpufreq_policy *policy, +/* Sysfs attributes */ + +static ssize_t show_amd_pstate_max_freq(struct cpufreq_policy *policy, char *buf) +{ + int ret = 0, max_freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + max_freq = amd_get_max_freq(cpudata); + if (max_freq < 0) + return max_freq; + + ret += sprintf(&buf[ret], "%u\n", max_freq); + + return ret; +} + +static ssize_t show_amd_pstate_nominal_freq(struct cpufreq_policy *policy, + char *buf) +{ + int ret = 0, nominal_freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + nominal_freq = amd_get_nominal_freq(cpudata); + if (nominal_freq < 0) + return nominal_freq; + + ret += sprintf(&buf[ret], "%u\n", nominal_freq); + + return ret; +} + +static ssize_t +show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *policy, char *buf) +{ + int ret = 0, freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + freq = amd_get_lowest_nonlinear_freq(cpudata); + if (freq < 0) + return freq; + + ret += sprintf(&buf[ret], "%u\n", freq); + + return ret; +} + +static ssize_t show_amd_pstate_min_freq(struct cpufreq_policy *policy, char *buf) +{ + int ret = 0; + int freq; + struct amd_cpudata *cpudata; + + cpudata = policy->driver_data; + + freq = amd_get_min_freq(cpudata); + if (freq < 0) + return freq; + + ret += sprintf(&buf[ret], "%u\n", freq); + + return ret; +} + +static ssize_t show_is_amd_pstate_enabled(struct cpufreq_policy *policy, + char *buf) { return sprintf(&buf[0], "%d\n", acpi_cpc_valid() ? 1 : 0); } cpufreq_freq_attr_ro(is_amd_pstate_enabled); +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); +cpufreq_freq_attr_ro(amd_pstate_min_freq); static struct freq_attr *amd_pstate_attr[] = { &is_amd_pstate_enabled, + &amd_pstate_max_freq, + &amd_pstate_nominal_freq, + &amd_pstate_lowest_nonlinear_freq, + &amd_pstate_min_freq, NULL, };
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2.25.1