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/linux/Documentation/devicetree/bindings/input/
H A Dmicrochip,qt1050.txt1 Microchip AT42QT1050 Five-channel Touch Sensor IC
11 - compatible: Must be "microchip,qt1050"
12 - reg: The I2C address of the device
13 - interrupts: The sink for the touchpad's IRQ output,
14 see ../interrupt-controller/interrupts.txt
17 - wakeup-source: touch keys can be used as a wakeup source
19 Each button (key) is represented as a sub-node:
25 - linux,code: Keycode to emit.
26 - reg: The key number. Valid values: 0, 1, 2, 3, 4.
28 Optional subnode-properties:
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/linux/tools/perf/Documentation/
H A Dperf-report.txt1 perf-report(1)
5 ----
6 perf-report - Read perf.data (created by perf record) and display the profile
9 --------
11 'perf report' [-i <file> | --input=file]
14 -----------
19 -------
20 -i::
21 --input=::
24 -v::
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H A Dperf-kvm.txt1 perf-kvm(1)
5 ----
6 perf-kvm - Tool to trace/measure kvm guest os
9 --------
11 'perf kvm' [--host] [--guest] [--guestmount=<path>
12 [--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]]
13 {top|record|report|diff|buildid-list} [<options>]
14 'perf kvm' [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path>
15 | --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat} [<options>]
19 -----------
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/linux/Documentation/devicetree/bindings/iio/adc/
H A Dst,spear600-adc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/st,spear600-adc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jonathan Cameron <jic23@kernel.org>
14 10-bit resolution. Datasheet can be found here:
20 - st,spear600-adc
28 sampling-frequency:
35 vref-external:
40 External voltage reference in milli-volts. If omitted the internal voltage
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H A Dmaxim,max34408.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Ivan Mikhaylov <fr0st61te@gmail.com>
13 The MAX34408/MAX34409 are two- and four-channel current monitors that are
15 unidirectional current sensor offers precision high-side operation with a
16 low full-scale sense voltage. The devices automatically sequence through
17 two or four channels and collect the current-sense samples and average them
18 to reduce the effect of impulse noise. The raw ADC samples are compared to
19 user-programmable digital thresholds to indicate overcurrent conditions.
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/linux/Documentation/hwmon/
H A Dfam15h_power.rst16 - BIOS and Kernel Developer's Guide (BKDG) For AMD Family 15h Processors
17 - BIOS and Kernel Developer's Guide (BKDG) For AMD Family 16h Processors
18 - AMD64 Architecture Programmer's Manual Volume 2: System Programming
23 -----------
55 On multi-node processors the calculated value is for the entire
57 attributes only for internal node0 of a multi-node processor.
62 calculate the average power consumed by a processor during a
91 CPU average power
102 iii. At time x, SW reads CpuSwPwrAcc MSR and samples the PTSC.
106 iv. At time y, SW reads CpuSwPwrAcc MSR and samples the PTSC.
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H A Dsysfs-interface.rst5 through the sysfs interface. Since lm-sensors 3.0.0, libsensors is
6 completely chip-independent. It assumes that all the kernel drivers
10 This is a major improvement compared to lm-sensors 2.
22 For this reason, even if we aim at a chip-independent libsensors, it will
37 Up to lm-sensors 3.0.0, libsensors looks for hardware monitoring attributes
38 in the "physical" device directory. Since lm-sensors 3.0.1, attributes found
61 to cause an alarm) is chip-dependent.
69 ----------------
76 -------------------------------------------------------------------------
79 `[0-*]` denotes any positive number starting from 0
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H A Dina3221.rst10 Addresses: I2C 0x40 - 0x43
19 -----------
24 and power are calculated host-side from these.
27 -------------
41 average is above this value.
56 samples Number of samples using in the averaging mode.
58 Supports the list of number of samples:
67 * S: number of samples
68 * BC: bus-voltage conversion time in millisecond
69 * SC: shunt-voltage conversion time in millisecond
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H A Dina2xx.rst10 Addresses: I2C 0x40 - 0x4f
20 Addresses: I2C 0x40 - 0x4f
30 Addresses: I2C 0x40 - 0x4f
40 Addresses: I2C 0x40 - 0x4f
50 Addresses: I2C 0x40 - 0x4f
60 Addresses: I2C 0x40 - 0x4f
70 Addresses: I2C 0x40 - 0x4f
80 -----------
82 The INA219 is a high-side current shunt and power monitor with an I2C
99 The SY24655 is a high- and low-side current shunt and power monitor with an I2C
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H A Dina209.rst6 * Burr-Brown / Texas Instruments INA209
10 Addresses scanned: -
16 - Paul Hays <Paul.Hays@cattail.ca>
17 - Ira W. Snyder <iws@ovro.caltech.edu>
18 - Guenter Roeck <linux@roeck-us.net>
22 -----------
24 The TI / Burr-Brown INA209 monitors voltage, current, and power on the high side
31 -------------
76 update_interval data conversion time; affects number of samples used
77 to average results for shunt and bus voltages.
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/linux/drivers/cpuidle/governors/
H A Dmenu.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * menu.c - the menu idle governor
5 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>
39 * -----------------------
53 * menu uses a running average for this correction factor, but it uses a set of
61 * Repeatable-interval-detector
62 * ----------------------------
102 /* Update the repeating-pattern data. */ in menu_update_intervals()
103 data->intervals[data->interval_ptr++] = interval_us; in menu_update_intervals()
104 if (data->interval_ptr >= INTERVALS) in menu_update_intervals()
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/linux/drivers/input/keyboard/
H A Dqt1050.c1 // SPDX-License-Identifier: GPL-2.0
109 u32 samples; member
229 err = regmap_read(ts->regmap, QT1050_CHIP_ID, &val); in qt1050_identify()
231 dev_err(&ts->client->dev, "Failed to read chip ID: %d\n", err); in qt1050_identify()
236 dev_err(&ts->client->dev, "ID %d not supported\n", val); in qt1050_identify()
241 err = regmap_read(ts->regmap, QT1050_FW_VERSION, &val); in qt1050_identify()
243 dev_err(&ts->client->dev, "could not read the firmware version\n"); in qt1050_identify()
247 dev_info(&ts->client->dev, "AT42QT1050 firmware version %1d.%1d\n", in qt1050_identify()
256 struct input_dev *input = ts->input; in qt1050_irq_threaded()
262 err = regmap_read(ts->regmap, QT1050_DET_STATUS, &val); in qt1050_irq_threaded()
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/linux/Documentation/userspace-api/media/drivers/
H A Dimx-uapi.rst1 .. SPDX-License-Identifier: GPL-2.0
13 ---------
18 - V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR
30 -----------------------------------
33 NTSC/PAL signal re-sync (too little or too many video lines). When
34 this happens, the IPU triggers a mechanism to re-establish vertical
60 - V4L2_CID_IMX_FIM_ENABLE
64 - V4L2_CID_IMX_FIM_NUM
66 How many frame interval measurements to average before comparing against
70 - V4L2_CID_IMX_FIM_TOLERANCE_MIN
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/linux/Documentation/userspace-api/media/v4l/
H A Dext-ctrls-colorimetry.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _colorimetry-controls:
15 -----------------------
17 .. _colorimetry-control-id:
32 .. flat-table:: struct v4l2_ctrl_hdr10_cll_info
33 :header-rows: 0
34 :stub-columns: 0
37 * - __u16
38 - ``max_content_light_level``
39 - The upper bound for the maximum light level among all individual
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/linux/include/linux/sunrpc/
H A Dmetrics.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Declarations for RPC client per-operation metrics
9 * RPC client per-operation statistics provide latency and retry
14 * These counters are not meant to be human-readable, but are meant to be
18 * by the tools by taking the difference between two instantaneous samples
19 * and dividing that by the time between the samples.
23 * arrays per-CPU because these counters are always modified behind locks.
40 * transmissions are required, on average, to complete that
/linux/arch/x86/events/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
35 average power consumption on Family 15h processors.
43 e.g., perf stat -e amd_l3/.../,amd_df/.../.
46 module will be called 'amd-uncore'.
52 Enable AMD Zen3 branch sampling support (BRS) which samples up to
/linux/tools/perf/bench/
H A Dinject-buildid.c1 // SPDX-License-Identifier: GPL-2.0
17 #include <subcmd/parse-options.h>
25 #include "util/build-id.h"
27 #include "util/synthetic-events.h"
34 static unsigned int nr_samples = 100; /* samples per mmap */
59 "Number of iterations used to compute average (default: 100)"),
60 OPT_UINTEGER('m', "nr-mmaps", &nr_mmaps,
62 OPT_UINTEGER('n', "nr-samples", &nr_samples,
70 "perf bench internals inject-build-id <options>",
76 * if it contains a build-id. Stops after collecting 4 times more than
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/linux/drivers/media/rc/
H A Dene_ir.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 #define ENE_STATUS 0 /* hardware status - unused */
17 /* 8 bytes of samples, divided in 2 packets*/
48 /* high parts of samples for fan input (8 samples)*/
101 /* Knobs for protocol decoding - will document when/if will use them */
108 /* Actual register which contains RLC RX data - read by firmware */
112 /* RLC configuration - sample period (1us resolution) + idle mode */
125 * Low nibble - number of carrier pulses to average
126 * High nibble - number of initial carrier pulses to discard
215 unsigned *tx_buffer; /* input samples buffer*/
/linux/drivers/input/touchscreen/
H A Dlpc32xx_ts.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * LPC32xx built-in touchscreen driver
43 #define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s) ((10 - (s)) << 7)
44 #define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s) ((10 - (s)) << 4)
57 #define MOD_NAME "ts-lpc32xx"
60 __raw_readl((dev)->tsc_base + (reg))
62 __raw_writel((val), (dev)->tsc_base + (reg))
83 struct input_dev *input = tsc->dev; in lpc32xx_ts_interrupt()
88 /* FIFO overflow - throw away samples */ in lpc32xx_ts_interrupt()
94 * Gather and normalize 4 samples. Pen-up events may have less in lpc32xx_ts_interrupt()
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H A Dmax11801_ts.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for MAXI MAX11801 - A Resistive touch screen controller with
16 * -----------------------------------------------------
18 * |----------------------------------------------------|
23 * ------------------------------------------------------
28 * http://www.maxim-ic.com/datasheet/index.mvp/id/5943
98 struct i2c_client *client = data->client; in max11801_ts_interrupt()
101 int x = -1; in max11801_ts_interrupt()
102 int y = -1; in max11801_ts_interrupt()
104 status = read_register(data->client, GENERNAL_STATUS_REG); in max11801_ts_interrupt()
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/linux/drivers/platform/chrome/
H A Dcros_ec_sensorhub_ring.c1 // SPDX-License-Identifier: GPL-2.0-only
43 int id = sample->sensor_id; in cros_sensorhub_send_sample()
46 if (id >= sensorhub->sensor_num) in cros_sensorhub_send_sample()
47 return -EINVAL; in cros_sensorhub_send_sample()
49 cb = sensorhub->push_data[id].push_data_cb; in cros_sensorhub_send_sample()
53 indio_dev = sensorhub->push_data[id].indio_dev; in cros_sensorhub_send_sample()
55 if (sample->flag & MOTIONSENSE_SENSOR_FLAG_FLUSH) in cros_sensorhub_send_sample()
58 return cb(indio_dev, sample->vector, sample->timestamp); in cros_sensorhub_send_sample()
62 * cros_ec_sensorhub_register_push_data() - register the callback to the hub.
80 if (sensor_num >= sensorhub->sensor_num) in cros_ec_sensorhub_register_push_data()
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/linux/Documentation/devicetree/bindings/mfd/
H A Dst,stmpe.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
15 - Linus Walleij <linus.walleij@linaro.org>
18 - $ref: /schemas/spi/spi-peripheral-props.yaml#
23 - st,stmpe601
24 - st,stmpe801
25 - st,stmpe811
26 - st,stmpe1600
27 - st,stmpe1601
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/linux/tools/perf/util/
H A Dannotate.h1 /* SPDX-License-Identifier: GPL-2.0 */
150 return which < PERCENT_MAX ? data->percent[which] : -1; in annotation_data__percent()
179 return dl->ops.target.offset_avail && !dl->ops.target.outside; in disasm_line__has_local_offset()
207 /* save data type info keyed by al->offset */
226 * struct sym_hist - symbol histogram information for an event
228 * @nr_samples: Total number of samples.
237 * struct cyc_hist - (CPU) cycle histogram for a basic block
245 * @num: Number of samples for the longest basic block.
246 * @num_aggr: Total number of samples for this address.
276 * struct annotated_source - symbols with hits have this attached as in annotation
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H A Dintel-tpebs.c1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <subcmd/run-command.h>
10 #include "intel-tpebs.h"
31 #define PERF_DATA "-"
84 return -ENOMEM; in evsel__tpebs_start_perf_record()
88 record_argv[i++] = "-W"; in evsel__tpebs_start_perf_record()
89 record_argv[i++] = "--synth=no"; in evsel__tpebs_start_perf_record()
91 scnprintf(control_fd_buf, sizeof(control_fd_buf), "--control=fd:%d,%d", in evsel__tpebs_start_perf_record()
95 record_argv[i++] = "-o"; in evsel__tpebs_start_perf_record()
98 if (!perf_cpu_map__is_any_cpu_or_is_empty(evsel->evlist->core.user_requested_cpus)) { in evsel__tpebs_start_perf_record()
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/linux/Documentation/sound/designs/
H A Dcompress-offload.rst2 ALSA Compress-Offload API
5 Pierre-Louis.Bossart <pierre-louis.bossart@linux.intel.com>
18 in system-on-chip designs, and DSPs are also integrated in audio
20 reduction of power consumption compared to host-based
27 provide a control and data-streaming interface for audio DSPs.
29 The design of this API was inspired by the 2-year experience with the
39 - separation between byte counts and time. Compressed formats may have
41 may vary from frame-to-frame. As a result, it is not possible to
44 reliable audio-video synchronization, which requires precise
45 reporting of the number of samples rendered at any given time.
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