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/Documentation/devicetree/bindings/opp/
Dopp-v2-qcom-level.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/opp-v2-qcom-level.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm OPP
10 - Niklas Cassel <nks@flawful.org>
13 - $ref: opp-v2-base.yaml#
17 const: operating-points-v2-qcom-level
20 '^opp-?[0-9]+$':
25 opp-level: true
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Dopp-v2.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/opp-v2.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic OPP (Operating Performance Points)
10 - Viresh Kumar <viresh.kumar@linaro.org>
13 - $ref: opp-v2-base.yaml#
17 const: operating-points-v2
22 - |
24 * Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states
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Dopp-v2-base.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/opp-v2-base.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic OPP (Operating Performance Points) Common Properties
10 - Viresh Kumar <viresh.kumar@linaro.org>
13 Devices work at voltage-current-frequency combinations and some implementations
25 pattern: '^opp-table(-[a-z0-9]+)?$'
27 opp-shared:
29 Indicates that device nodes using this OPP Table Node's phandle switch
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Dopp-v2-kryo-cpu.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/opp-v2-kryo-cpu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm Technologies, Inc. NVMEM OPP
10 - Ilia Lin <ilia.lin@kernel.org>
13 - $ref: opp-v2-base.yaml#
17 the CPU frequencies subset and voltage value of each OPP varies based on
22 The qcom-cpufreq-nvmem driver reads the efuse value from the SoC to provide
23 the OPP framework with required information (existing HW bitmap).
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Dopp-v1.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/opp-v1.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic OPP (Operating Performance Points) v1
10 - Viresh Kumar <viresh.kumar@linaro.org>
13 Devices work at voltage-current-frequency combinations and some implementations
19 This binding only supports voltage-frequency pairs.
24 operating-points:
25 $ref: /schemas/types.yaml#/definitions/uint32-matrix
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/Documentation/devicetree/bindings/power/
Dqcom,rpmpd.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Bjorn Andersson <andersson@kernel.org>
19 - enum:
20 - qcom,mdm9607-rpmpd
21 - qcom,msm8226-rpmpd
22 - qcom,msm8909-rpmpd
23 - qcom,msm8916-rpmpd
24 - qcom,msm8917-rpmpd
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/Documentation/devicetree/bindings/cpufreq/
Dqcom-cpufreq-nvmem.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/qcom-cpufreq-nvmem.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Ilia Lin <ilia.lin@kernel.org>
17 on the CPU OPP in use. The CPUFreq driver sets the CPR power domain level
18 according to the required OPPs defined in the CPU OPP tables.
20 For old implementation efuses are parsed to select the correct opp table and
28 - qcom,apq8064
29 - qcom,apq8096
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Dapple,cluster-cpufreq.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/apple,cluster-cpufreq.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hector Martin <marcan@marcan.st>
13 Apple SoCs (e.g. M1) have a per-cpu-cluster DVFS controller that is part of
15 operating-points-v2 table to define the CPU performance states, with the
16 opp-level property specifying the hardware p-state index for that level.
21 - items:
22 - enum:
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Dcpufreq-dt.txt11 - None
14 - operating-points: Refer to Documentation/devicetree/bindings/opp/opp-v1.yaml for
17 - clock-latency: Specify the possible maximum transition latency for clock,
19 - voltage-tolerance: Specify the CPU voltage tolerance in percentage.
20 - #cooling-cells:
22 Documentation/devicetree/bindings/thermal/thermal-cooling-devices.yaml.
27 #address-cells = <1>;
28 #size-cells = <0>;
31 compatible = "arm,cortex-a9";
33 next-level-cache = <&L2>;
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/Documentation/devicetree/bindings/power/avs/
Dqcom,cpr.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Niklas Cassel <nks@flawful.org>
14 or other device. Each OPP of a device corresponds to a "corner" that has
23 - enum:
24 - qcom,qcs404-cpr
25 - const: qcom,cpr
36 - description: Reference clock.
38 clock-names:
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/Documentation/devicetree/bindings/display/msm/
Dgpu.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Rob Clark <robdclark@gmail.com>
14 # as a work-around:
20 - qcom,adreno
21 - amd,imageon
23 - compatible
28 - description: |
30 figure out the chip-id.
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/Documentation/devicetree/bindings/soc/qcom/
Dqcom,rpmh-rsc.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/soc/qcom/qcom,rpmh-rsc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Bjorn Andersson <bjorn.andersson@linaro.org>
27 ACTIVE - Triggered by Linux
28 SLEEP - Triggered by F/W
29 WAKE - Triggered by F/W
30 CONTROL - Triggered by F/W
31 See also:: <dt-bindings/soc/qcom,rpmh-rsc.h>
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Dqcom,smd-rpm.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/soc/qcom/qcom,smd-rpm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
23 Refer to Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.yaml
28 - Andy Gross <agross@kernel.org>
29 - Bjorn Andersson <bjorn.andersson@linaro.org>
34 - items:
35 - enum:
36 - qcom,rpm-apq8084
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/Documentation/devicetree/bindings/interconnect/
Dqcom,msm8998-bwmon.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/interconnect/qcom,msm8998-bwmon.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
17 - Measuring the bandwidth between CPUs and Last Level Cache Controller -
19 - Measuring the bandwidth between Last Level Cache Controller and memory
20 (DDR) - called LLCC BWMON.
25 - const: qcom,msm8998-bwmon # BWMON v4
26 - items:
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/Documentation/power/
Dopp.rst2 Operating Performance Points (OPP) Library
5 (C) 2009-2010 Nishanth Menon <nm@ti.com>, Texas Instruments Incorporated
10 2. Initial OPP List Registration
11 3. OPP Search Functions
12 4. OPP Availability Control Functions
13 5. OPP Data Retrieval Functions
19 1.1 What is an Operating Performance Point (OPP)?
20 -------------------------------------------------
22 Complex SoCs of today consists of a multiple sub-modules working in conjunction.
25 facilitate this, sub-modules in a SoC are grouped into domains, allowing some
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/Documentation/gpu/amdgpu/display/
Ddcn-overview.rst10 .. kernel-figure:: dc_pipeline_overview.svg
19 * **Display Pipe and Plane (DPP)**: This block provides pre-blend pixel
24 multiple planes, using global or per-pixel alpha.
26 * **Output Pixel Processing (OPP)**: Process and format pixels to be sent to
38 * **Multi-Media HUB (MMHUBBUB)**: Memory controller interface for DMCUB and DWB
43 the Display Micro-Controller Unit - version B (DMCUB), which is handled via
60 OPP. It is DC's responsibility to drive the best configuration for each
73 the Global Sync deserves an extra level of detail described in the next
84 ----------------------
95 * OPP
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Ddc-glossary.rst7 'Documentation/gpu/amdgpu/amdgpu-glossary.rst'; if you cannot find it anywhere,
19 Application-Specific Integrated Circuit
49 Cathode Ray Tube Controller - commonly called "Controller" - Generates
108 Display Micro-Controller Unit
111 Display Micro-Controller Unit, version B
168 Memory Access at Last Level
194 OPP
225 Transition-Minimized Differential Signaling
/Documentation/devicetree/bindings/thermal/
Dthermal-cooling-devices.yaml1 # SPDX-License-Identifier: (GPL-2.0)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-cooling-devices.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Amit Kucheria <amitk@kernel.org>
20 - thermal-sensor: device that measures temperature, has SoC-specific bindings
21 - cooling-device: device used to dissipate heat either passively or actively
22 - thermal-zones: a container of the following node types used to describe all
28 - Passive cooling: by means of regulating device performance. A typical
31 - Active cooling: by means of activating devices in order to remove the
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/Documentation/driver-api/thermal/
Dcpu-cooling-api.rst22 --------------------------------------------
30 "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
42 the name "thermal-cpufreq-%x" linking it with a device tree node, in
54 This interface function unregisters the "thermal-cpufreq-%x" cooling device.
63 supported currently). This power model requires that the operating-points of
64 the CPUs are registered using the kernel's opp library and the
73 - The time the processor spends running, consuming dynamic power, as
76 - The voltage and frequency levels as a result of DVFS. The DVFS
77 level is a dominant factor governing power consumption.
78 - In running time the 'execution' behaviour (instruction types, memory
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/Documentation/scheduler/
Dschedutil.rst15 individual tasks to task-group slices to CPU runqueues. As the basis for this
31 Note that blocked tasks still contribute to the aggregates (task-group slices
57 r_dvfs := -----
61 hardware counters (Intel APERF/MPERF, ARMv8.4-AMU) to provide us this ratio.
65 f_cur := ----- * P0
68 4C-turbo; if available and turbo enabled
69 f_max := { 1C-turbo; if turbo enabled
73 r_dvfs := min( 1, ----- )
78 r_cpu is determined as the ratio of highest performance level of the current
79 CPU vs the highest performance level of any other CPU in the system.
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Dsched-capacity.rst9 ----------------
13 different performance characteristics - on such platforms, not all CPUs can be
23 - not all CPUs may have the same microarchitecture (µarch).
24 - with Dynamic Voltage and Frequency Scaling (DVFS), not all CPUs may be
25 physically able to attain the higher Operating Performance Points (OPP).
28 performance-oriented than the LITTLE ones (more pipeline stages, bigger caches,
39 -------------------
43 attainable performance level. This original capacity is returned by
49 while ``original capacity`` is class-agnostic. The rest of this document will use
54 ---------------------
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/Documentation/devicetree/bindings/soc/tegra/
Dnvidia,tegra20-pmc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/soc/tegra/nvidia,tegra20-pmc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Thierry Reding <thierry.reding@gmail.com>
11 - Jonathan Hunter <jonathanh@nvidia.com>
16 - nvidia,tegra20-pmc
17 - nvidia,tegra30-pmc
18 - nvidia,tegra114-pmc
19 - nvidia,tegra124-pmc
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