| /Linux-v4.19/Documentation/admin-guide/pm/ |
| D | cpufreq.rst | 41 to as CPU performance scaling or CPU frequency scaling (because it involves
48 The Linux kernel supports CPU performance scaling by means of the ``CPUFreq``
49 (CPU Frequency scaling) subsystem that consists of three layers of code: the
50 core, scaling governors and scaling drivers.
53 interfaces for all platforms that support CPU performance scaling. It defines
57 As a rule, each governor implements one, possibly parametrized, scaling
60 Scaling drivers talk to the hardware. They provide scaling governors with
63 by scaling governors.
65 In principle, all available scaling governors can be used with every scaling
67 performance scaling algorithms for P-state selection can be represented in a
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| D | intel_pstate.rst | 14 :doc:`CPU performance scaling subsystem <cpufreq>` in the Linux kernel
15 (``CPUFreq``). It is a scaling driver for the Sandy Bridge and later
48 ``sysfs`` which allows another ``CPUFreq`` scaling driver to be loaded and
67 In this mode the driver bypasses the scaling governors layer of ``CPUFreq`` and
68 provides its own scaling algorithms for P-state selection. Those algorithms
69 can be applied to ``CPUFreq`` policies in the same way as generic scaling
74 They are not generic scaling governors, but their names are the same as the
171 implemented by the generic ``schedutil`` scaling governor except that the
196 Then, the driver behaves like a regular ``CPUFreq`` scaling driver. That is,
197 it is invoked by generic scaling governors when necessary to talk to the
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| /Linux-v4.19/Documentation/cpu-freq/ |
| D | index.txt | 1 CPU frequency and voltage scaling code in the Linux(TM) kernel
13 Clock scaling allows you to change the clock speed of the CPUs on the
55 Clock and voltage scaling for the SA-1100:
56 * http://www.lartmaker.nl/projects/scaling
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| D | cpufreq-stats.txt | 2 CPU frequency and voltage scaling statistics in the Linux(TM) kernel
113 CPU Frequency scaling --->
114 [*] CPU Frequency scaling
118 "CPU Frequency scaling" (CONFIG_CPU_FREQ) should be enabled to configure
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| /Linux-v4.19/drivers/cpufreq/ |
| D | Kconfig.arm | 2 # ARM CPU Frequency scaling drivers
69 ("AVS") to handle voltage and frequency scaling. This driver provides
101 tristate "CPU Frequency scaling support for MediaTek SoCs"
164 CPU Frequency scaling support for S3C2410
172 CPU Frequency scaling support for S3C2412 and S3C2413 SoC CPUs.
175 bool "S3C2416 CPU Frequency scaling support"
181 voltage scaling mode in which it is possible to reduce the
187 bool "Allow voltage scaling for S3C2416 arm core"
190 Enable CPU voltage scaling when entering the dvs mode.
197 bool "S3C2440/S3C2442 CPU Frequency scaling support"
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| D | Kconfig.powerpc | 2 tristate "CBE frequency scaling"
11 bool "CBE frequency scaling using PMI interface"
50 tristate "CPU frequency scaling for IBM POWERNV platform"
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| D | intel_pstate.c | 147 int scaling; member
1393 trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu); in intel_pstate_set_pstate()
1425 cpu->pstate.scaling = pstate_funcs.get_scaling(); in intel_pstate_get_cpu_pstates()
1426 cpu->pstate.max_freq = cpu->pstate.max_pstate * cpu->pstate.scaling; in intel_pstate_get_cpu_pstates()
1432 cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling; in intel_pstate_get_cpu_pstates()
1434 cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling; in intel_pstate_get_cpu_pstates()
1683 trace_cpu_frequency(target_pstate * cpu->pstate.scaling, cpu->cpu); in intel_pstate_adjust_pstate()
2076 policy->min = cpu->pstate.min_pstate * cpu->pstate.scaling; in __intel_pstate_cpu_init()
2077 policy->max = cpu->pstate.turbo_pstate * cpu->pstate.scaling; in __intel_pstate_cpu_init()
2080 policy->cpuinfo.min_freq = cpu->pstate.min_pstate * cpu->pstate.scaling; in __intel_pstate_cpu_init()
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| D | Kconfig | 1 menu "CPU Frequency scaling"
4 bool "CPU Frequency scaling"
7 CPU Frequency scaling allows you to change the clock speed of
132 tristate "'userspace' governor for userspace frequency scaling"
205 comment "CPU frequency scaling drivers"
328 tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
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| /Linux-v4.19/drivers/clk/meson/ |
| D | Kconfig | 29 want peripherals and CPU frequency scaling to work.
38 Say Y if you want peripherals and CPU frequency scaling to work.
47 Say Y if you want peripherals and CPU frequency scaling to work.
|
| /Linux-v4.19/drivers/leds/ |
| D | leds-pca963x.c | 63 unsigned int scaling; member
232 unsigned int scaling = pca963x->chip->chipdef->scaling; in pca963x_period_scale() local
234 return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val; in pca963x_period_scale()
342 if (of_property_read_u32(np, "nxp,period-scale", &chip->scaling)) in pca963x_dt_init()
343 chip->scaling = 1000; in pca963x_dt_init()
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| /Linux-v4.19/Documentation/media/uapi/v4l/ |
| D | crop.rst | 20 abilities cropping and scaling. Some video output devices can scale an
48 support scaling or the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and
70 The cropping, insertion and scaling process
111 Video hardware can have various cropping, insertion and scaling
112 limitations. It may only scale up or down, support only discrete scaling
113 factors, or have different scaling abilities in horizontal and vertical
114 direction. Also it may not support scaling at all. At the same time the
131 Suppose scaling on a video capture device is restricted to a factor 1:1
146 rectangle of 608 × 456 pixels. The present scaling factors limit
218 /* We could check the actual image size now, the actual scaling factor
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| D | dev-subdev.rst | 96 :ref:`pipeline-scaling`, where image scaling can be performed on both
100 .. _pipeline-scaling:
113 scaling on the sensor is required to achieve higher frame rates.
188 - Sub-devices that scale frames using variable scaling factors should
190 modified. If the 1:1 scaling ratio is supported, this means that
201 for the pipeline described in :ref:`pipeline-scaling` (table columns
290 Selections: cropping, scaling and composition
313 The scaling operation changes the size of the image by scaling it to new
314 dimensions. The scaling ratio isn't specified explicitly, but is implied
323 subdev supports scaling but not composing, the top and left values are
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| D | selection-api-configuration.rst | 11 Video hardware can have various cropping, composing and scaling
12 limitations. It may only scale up or down, support only discrete scaling
13 factors, or have different scaling abilities in the horizontal and
14 vertical directions. Also it may not support scaling at all. At the same
133 An application can detect if scaling is performed by comparing the width
136 scaling is applied. The application can compute the scaling ratios using
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| D | selection-api-examples.rst | 60 Example: Querying for scaling factors
82 /* computing scaling factors */
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| D | selection-api-intro.rst | 12 these abilities cropping, scaling and composing.
28 scaling then the cropping and composing rectangles have the same size.
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| D | selection-api.rst | 5 Cropping, composing and scaling -- the SELECTION API
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| D | vidioc-cropcap.rst | 12 VIDIOC_CROPCAP - Information about the video cropping and scaling abilities
44 support cropping and/or scaling and/or have non-square pixels, and for
79 - This is the pixel aspect (y / x) when no scaling is applied, the
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| D | selection-api-targets.rst | 16 Targets used by a cropping, composing and scaling process
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| /Linux-v4.19/Documentation/devicetree/bindings/iio/adc/ |
| D | qcom,spmi-vadc.txt | 56 - qcom,pre-scaling:
59 Definition: Used for scaling the channel input signal before the signal is
61 pre-determined ratio and use it for post scaling. Select one from
121 qcom,pre-scaling = <1 3>;
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| /Linux-v4.19/Documentation/hwmon/ |
| D | vt1211 | 75 external scaling resistors. This external scaling needs to be compensated for
80 The board level scaling resistors according to VIA's recommendation are as
97 performs the scaling and returns the properly scaled voltage value.
114 internal thermal diode and the driver does all the scaling for temp2 and
116 temp1 and temp3-temp7, scaling depends on the board implementation and needs
141 scaling resistor (Rs):
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| D | mc13783-adc | 25 a chip internal scaling applied .
31 chip internal scaling:
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| /Linux-v4.19/drivers/gpu/drm/arm/ |
| D | malidp_crtc.c | 260 u8 scaling = cs->scaled_planes_mask; in malidp_crtc_atomic_check_scaling() local
263 if (!scaling) { in malidp_crtc_atomic_check_scaling()
269 if (scaling & (scaling - 1)) in malidp_crtc_atomic_check_scaling()
276 if (!(mp->layer->id & scaling)) in malidp_crtc_atomic_check_scaling()
|
| /Linux-v4.19/Documentation/media/v4l-drivers/ |
| D | soc-camera.rst | 120 pixel. Changing sensor window sizes preserves any scaling factors, therefore
124 much as possible by modifying scaling factors. If the sensor window cannot be
127 In soc-camera there are two locations, where scaling and cropping can take
130 It is more efficient to perform scaling and cropping in the camera driver to
133 driver may decide to also use its own scaling and cropping to fulfill the user's
140 .s_fmt() and .try_fmt() have to be implemented too. Sensor window and scaling
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| /Linux-v4.19/arch/arm64/boot/dts/qcom/ |
| D | pm8916.dtsi | 70 qcom,pre-scaling = <1 10>;
74 qcom,pre-scaling = <1 3>;
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| /Linux-v4.19/Documentation/devicetree/bindings/cpufreq/ |
| D | cpufreq-spear.txt | 4 SPEAr SoC cpufreq driver for CPU frequency scaling.
|
