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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-18 19:32:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-18 19:32:28 +0300
commitd0411ec8ca6b98061023873e334323ef102100cc (patch)
treeef7aa05ba464fc5d59c8753e5fb8599bf628937b /Documentation/power/pm_qos_interface.rst
parent4b09ddbcd107e280077bd3e918c8089dfa426980 (diff)
parent918e162e6a71e924a343b41f71789ad14e1e3229 (diff)
downloadlinux-d0411ec8ca6b98061023873e334323ef102100cc.tar.xz
Merge tag 'pm-5.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki: "These modify the Intel RAPL driver to allow it to use an MMIO interface to the hardware, make the int340X thermal driver provide such an interface for it, add Intel Ice Lake CPU IDs to the RAPL driver (these changes depend on the previously merged x86 arch changes), update cpufreq to use the PM QoS framework for managing the min and max frequency limits, and add update the imx-cpufreq-dt cpufreq driver to support i.MX8MN. Specifics: - Add MMIO interface support to the Intel RAPL power capping driver and update the int340X thermal driver to provide a RAPL MMIO interface (Zhang Rui, Stephen Rothwell). - Add Intel Ice Lake CPU IDs to the RAPL driver (Zhang Rui, Rajneesh Bhardwaj). - Make cpufreq use the PM QoS framework (instead of notifiers) for managing the min and max frequency constraints (Viresh Kumar). - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson Huang)" * tag 'pm-5.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (27 commits) cpufreq: Make cpufreq_generic_init() return void intel_rapl: need linux/cpuhotplug.h for enum cpuhp_state powercap/rapl: Add Ice Lake NNPI support to RAPL driver powercap/intel_rapl: add support for ICX-D powercap/intel_rapl: add support for ICX powercap/intel_rapl: add support for IceLake desktop intel_rapl: Fix module autoloading issue int340X/processor_thermal_device: add support for MMIO RAPL intel_rapl: support two power limits for every RAPL domain intel_rapl: support 64 bit register intel_rapl: abstract RAPL common code intel_rapl: cleanup hardcoded MSR access intel_rapl: cleanup some functions intel_rapl: abstract register access operations intel_rapl: abstract register address intel_rapl: introduce struct rapl_if_private intel_rapl: introduce intel_rapl.h intel_rapl: remove hardcoded register index intel_rapl: use reg instead of msr cpufreq: imx-cpufreq-dt: Add i.MX8MN support ...
Diffstat (limited to 'Documentation/power/pm_qos_interface.rst')
-rw-r--r--Documentation/power/pm_qos_interface.rst12
1 files changed, 7 insertions, 5 deletions
diff --git a/Documentation/power/pm_qos_interface.rst b/Documentation/power/pm_qos_interface.rst
index 945fc6d760c9..69921f072ce1 100644
--- a/Documentation/power/pm_qos_interface.rst
+++ b/Documentation/power/pm_qos_interface.rst
@@ -129,7 +129,7 @@ int dev_pm_qos_remove_request(handle):
and call the notification trees if the target was changed as a result of
removing the request.
-s32 dev_pm_qos_read_value(device):
+s32 dev_pm_qos_read_value(device, type):
Returns the aggregated value for a given device's constraints list.
enum pm_qos_flags_status dev_pm_qos_flags(device, mask)
@@ -176,12 +176,14 @@ Notification mechanisms:
The per-device PM QoS framework has a per-device notification tree.
-int dev_pm_qos_add_notifier(device, notifier):
- Adds a notification callback function for the device.
+int dev_pm_qos_add_notifier(device, notifier, type):
+ Adds a notification callback function for the device for a particular request
+ type.
+
The callback is called when the aggregated value of the device constraints list
- is changed (for resume latency device PM QoS only).
+ is changed.
-int dev_pm_qos_remove_notifier(device, notifier):
+int dev_pm_qos_remove_notifier(device, notifier, type):
Removes the notification callback function for the device.