Merge tag 'pm-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix up recently added features (the Kryo cpufreq driver and
  performance states coverage in the generic power domains framework),
  add missing documentation for a recently added sysfs knob in the
  intel_pstate driver and fix an error in its documentation.

  Specifics:

   - Fix the initialization time error handling in the recently added
     Kryo cpufreq driver (Dan Carpenter).

   - Fix up the recently added coverage of performance states in the
     generic power domains (genpd) framework (Viresh Kumar).

   - Add missing documentation of the new hwp_dynamic_boost sysfs knob
     in the intel_pstate driver (Rafael Wysocki).

   - Fix incorrect sysfs path in the intel_pstate driver documentation
     (Rafael Wysocki)"

* tag 'pm-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Documentation: intel_pstate: Describe hwp_dynamic_boost sysfs knob
  Documentation: admin-guide: intel_pstate: Fix sysfs path
  PM / Domains: Rename opp_node to np
  PM / Domains: Fix return value of of_genpd_opp_to_performance_state()
  cpufreq: qcom-kryo: Fix error handling in probe()

diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst
index 8b9164990956743da612f2c968a191864dfc4c81..8f1d3de449b53fedcc78d1aee506e6882f2be90c 100644 (file)
--- a/Documentation/admin-guide/pm/intel_pstate.rst
+++ b/Documentation/admin-guide/pm/intel_pstate.rst
@@ -324,8 +324,7 @@ Global Attributes
 
 ``intel_pstate`` exposes several global attributes (files) in ``sysfs`` to
 control its functionality at the system level.  They are located in the
-``/sys/devices/system/cpu/cpufreq/intel_pstate/`` directory and affect all
-CPUs.
+``/sys/devices/system/cpu/intel_pstate/`` directory and affect all CPUs.
 
 Some of them are not present if the ``intel_pstate=per_cpu_perf_limits``
 argument is passed to the kernel in the command line.
@@ -379,6 +378,17 @@ argument is passed to the kernel in the command line.
        but it affects the maximum possible value of per-policy P-state limits
        (see `Interpretation of Policy Attributes`_ below for details).
 
+``hwp_dynamic_boost``
+       This attribute is only present if ``intel_pstate`` works in the
+       `active mode with the HWP feature enabled <Active Mode With HWP_>`_ in
+       the processor.  If set (equal to 1), it causes the minimum P-state limit
+       to be increased dynamically for a short time whenever a task previously
+       waiting on I/O is selected to run on a given logical CPU (the purpose
+       of this mechanism is to improve performance).
+
+       This setting has no effect on logical CPUs whose minimum P-state limit
+       is directly set to the highest non-turbo P-state or above it.
+
 .. _status_attr:
 
 ``status``

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 4925af5c4cf039e6cc07918967aa6995353e4bd8..c298de8a8308b89569ad4e2d750f9c4c721ed20d 100644 (file)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2487,10 +2487,9 @@ EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
  * power domain corresponding to a DT node's "required-opps" property.
  *
  * @dev: Device for which the performance-state needs to be found.
- * @opp_node: DT node where the "required-opps" property is present. This can be
+ * @np: DT node where the "required-opps" property is present. This can be
  *     the device node itself (if it doesn't have an OPP table) or a node
  *     within the OPP table of a device (if device has an OPP table).
- * @state: Pointer to return performance state.
  *
  * Returns performance state corresponding to the "required-opps" property of
  * a DT node. This calls platform specific genpd->opp_to_performance_state()
@@ -2499,7 +2498,7 @@ EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
  * Returns performance state on success and 0 on failure.
  */
 unsigned int of_genpd_opp_to_performance_state(struct device *dev,
-                                              struct device_node *opp_node)
+                                              struct device_node *np)
 {
        struct generic_pm_domain *genpd;
        struct dev_pm_opp *opp;
@@ -2514,7 +2513,7 @@ unsigned int of_genpd_opp_to_performance_state(struct device *dev,
 
        genpd_lock(genpd);
 
-       opp = of_dev_pm_opp_find_required_opp(&genpd->dev, opp_node);
+       opp = of_dev_pm_opp_find_required_opp(&genpd->dev, np);
        if (IS_ERR(opp)) {
                dev_err(dev, "Failed to find required OPP: %ld\n",
                        PTR_ERR(opp));

diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-kryo.c
index 01bddacf5c3b40e5dd9604d0675f75c99656bd44..29389accf3e97df7a5700b49e980c88de0974583 100644 (file)
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
@@ -87,8 +87,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
        int ret;
 
        cpu_dev = get_cpu_device(0);
-       if (NULL == cpu_dev)
-               ret = -ENODEV;
+       if (!cpu_dev)
+               return -ENODEV;
 
        msm8996_version = qcom_cpufreq_kryo_get_msm_id();
        if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
@@ -97,8 +97,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
        }
 
        np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
-       if (IS_ERR(np))
-               return PTR_ERR(np);
+       if (!np)
+               return -ENOENT;
 
        ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");
        if (!ret) {

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 9206a4fef9ac151905a825700c6ae7477d7cbd88..cb8d84090cfb7adb478d156727279aa48686d816 100644 (file)
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -234,7 +234,7 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
 int of_genpd_parse_idle_states(struct device_node *dn,
                               struct genpd_power_state **states, int *n);
 unsigned int of_genpd_opp_to_performance_state(struct device *dev,
-                               struct device_node *opp_node);
+                               struct device_node *np);
 
 int genpd_dev_pm_attach(struct device *dev);
 struct device *genpd_dev_pm_attach_by_id(struct device *dev,
@@ -274,9 +274,9 @@ static inline int of_genpd_parse_idle_states(struct device_node *dn,
 
 static inline unsigned int
 of_genpd_opp_to_performance_state(struct device *dev,
-                                 struct device_node *opp_node)
+                                 struct device_node *np)
 {
-       return -ENODEV;
+       return 0;
 }
 
 static inline int genpd_dev_pm_attach(struct device *dev)