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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-02-12 14:14:33 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-02-12 14:14:33 +0300
commit78317ed93a5865889cc1471df2afc9d7bc59f6e2 (patch)
tree34d0ce5d8a0a9ac7abda60f708874883adf9c6d6 /drivers/cpufreq/scmi-cpufreq.c
parentd13937116f1e82bf508a6325111b322c30c85eb9 (diff)
parenta9a744dd5b82843a9c99d9f97794fb51bc2ed8dd (diff)
downloadlinux-78317ed93a5865889cc1471df2afc9d7bc59f6e2.tar.xz
Merge branch 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm into pm-opp
Pull operating performance points (OPP) framework updates for v5.1 from Viresh Kumar: "This pull request contains following changes: - Introduced new OPP helper for power-estimation and used it in several cpufreq drivers (Quentin Perret, Matthias Kaehlcke, Dietmar Eggemann, and Yangtao Li). - OPP Debugfs cleanup (Greg KH). - OPP core cleanup (Viresh Kumar)." * 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: OMAP: Register an Energy Model cpufreq: imx6q: Register an Energy Model opp: no need to check return value of debugfs_create functions cpufreq: mediatek: Register an Energy Model cpufreq: scmi: Register an Energy Model cpufreq: arm_big_little: Register an Energy Model cpufreq: scpi: Register an Energy Model cpufreq: dt: Register an Energy Model PM / OPP: Introduce a power estimation helper PM / OPP: Remove unused parameter of _generic_set_opp_clk_only()
Diffstat (limited to 'drivers/cpufreq/scmi-cpufreq.c')
-rw-r--r--drivers/cpufreq/scmi-cpufreq.c39
1 files changed, 36 insertions, 3 deletions
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index 242c3370544e..0d87e1433296 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -12,6 +12,7 @@
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/cpu_cooling.h>
+#include <linux/energy_model.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/pm_opp.h>
@@ -103,13 +104,42 @@ scmi_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
return 0;
}
+static int __maybe_unused
+scmi_get_cpu_power(unsigned long *power, unsigned long *KHz, int cpu)
+{
+ struct device *cpu_dev = get_cpu_device(cpu);
+ unsigned long Hz;
+ int ret, domain;
+
+ if (!cpu_dev) {
+ pr_err("failed to get cpu%d device\n", cpu);
+ return -ENODEV;
+ }
+
+ domain = handle->perf_ops->device_domain_id(cpu_dev);
+ if (domain < 0)
+ return domain;
+
+ /* Get the power cost of the performance domain. */
+ Hz = *KHz * 1000;
+ ret = handle->perf_ops->est_power_get(handle, domain, &Hz, power);
+ if (ret)
+ return ret;
+
+ /* The EM framework specifies the frequency in KHz. */
+ *KHz = Hz / 1000;
+
+ return 0;
+}
+
static int scmi_cpufreq_init(struct cpufreq_policy *policy)
{
- int ret;
+ int ret, nr_opp;
unsigned int latency;
struct device *cpu_dev;
struct scmi_data *priv;
struct cpufreq_frequency_table *freq_table;
+ struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power);
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
@@ -136,8 +166,8 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
return ret;
}
- ret = dev_pm_opp_get_opp_count(cpu_dev);
- if (ret <= 0) {
+ nr_opp = dev_pm_opp_get_opp_count(cpu_dev);
+ if (nr_opp <= 0) {
dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
ret = -EPROBE_DEFER;
goto out_free_opp;
@@ -171,6 +201,9 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
policy->cpuinfo.transition_latency = latency;
policy->fast_switch_possible = true;
+
+ em_register_perf_domain(policy->cpus, nr_opp, &em_cb);
+
return 0;
out_free_priv: