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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-06-10 17:10:30 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-06-10 17:10:30 +0200
commit4c277e2f859694291245701f054962e05c1ca16d (patch)
treea138d1a6460d2887ed3edc83bed55be9c7cdf8b0 /Documentation
parentafd8d7c7f93681370f6fc2ec62f2705710eee62d (diff)
parent4573e9ef51539905e713ce2b3148fe96b90b772d (diff)
Merge branch 'pm-opp'
* pm-opp: opp: Don't parse icc paths unnecessarily opp: Remove bandwidth votes when target_freq is zero opp: core: add regulators enable and disable opp: Reorder the code for !target_freq case opp: Expose bandwidth information via debugfs cpufreq: dt: Add support for interconnect bandwidth scaling opp: Update the bandwidth on OPP frequency changes opp: Add sanity checks in _read_opp_key() opp: Add support for parsing interconnect bandwidth interconnect: Remove unused module exit code from core interconnect: Disallow interconnect core to be built as a module interconnect: Add of_icc_get_by_index() helper function OPP: Add helpers for reading the binding properties dt-bindings: opp: Introduce opp-peak-kBps and opp-avg-kBps bindings
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/opp/opp.txt17
-rw-r--r--Documentation/devicetree/bindings/property-units.txt4
2 files changed, 18 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
index 68592271461f..9d16d417e9be 100644
--- a/Documentation/devicetree/bindings/opp/opp.txt
+++ b/Documentation/devicetree/bindings/opp/opp.txt
@@ -83,9 +83,14 @@ properties.
Required properties:
- opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. This is a
- required property for all device nodes but devices like power domains. The
- power domain nodes must have another (implementation dependent) property which
- uniquely identifies the OPP nodes.
+ required property for all device nodes, unless another "required" property to
+ uniquely identify the OPP nodes exists. Devices like power domains must have
+ another (implementation dependent) property.
+
+- opp-peak-kBps: Peak bandwidth in kilobytes per second, expressed as an array
+ of 32-bit big-endian integers. Each element of the array represents the
+ peak bandwidth value of each interconnect path. The number of elements should
+ match the number of interconnect paths.
Optional properties:
- opp-microvolt: voltage in micro Volts.
@@ -132,6 +137,12 @@ Optional properties:
- opp-level: A value representing the performance level of the device,
expressed as a 32-bit integer.
+- opp-avg-kBps: Average bandwidth in kilobytes per second, expressed as an array
+ of 32-bit big-endian integers. Each element of the array represents the
+ average bandwidth value of each interconnect path. The number of elements
+ should match the number of interconnect paths. This property is only
+ meaningful in OPP tables where opp-peak-kBps is present.
+
- clock-latency-ns: Specifies the maximum possible transition latency (in
nanoseconds) for switching to this OPP from any other OPP.
diff --git a/Documentation/devicetree/bindings/property-units.txt b/Documentation/devicetree/bindings/property-units.txt
index e9b8360b3288..c80a110c1e26 100644
--- a/Documentation/devicetree/bindings/property-units.txt
+++ b/Documentation/devicetree/bindings/property-units.txt
@@ -41,3 +41,7 @@ Temperature
Pressure
----------------------------------------
-kpascal : kilopascal
+
+Throughput
+----------------------------------------
+-kBps : kilobytes per second