| /linux/Documentation/timers/ |
| H A D | hrtimers.rst | 2 hrtimers - subsystem for high-resolution kernel timers
5 This patch introduces a new subsystem for high-resolution kernel timers.
9 back and forth trying to integrate high-resolution and high-precision
11 such high-resolution timer implementations in practice, we came to the
18 - the forced handling of low-resolution and high-resolution timers in
21 32-bitness assumptions, and has been honed and micro-optimized for a
23 for many years - and thus even small extensions to it easily break
26 current usage - but it is simply not suitable to be extended for
27 high-res timers.
29 - the unpredictable [O(N)] overhead of cascading leads to delays which
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| H A D | highres.rst | 2 High resolution timers and dynamic ticks design notes
8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
31 ---------------------------
40 - time ordered enqueueing into a rb-tree
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| /linux/Documentation/fb/ |
| H A D | viafb.modes | 10 # 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock)
13 # Resolution 640 480
28 mode "640x480-60"
31 timings 39722 48 16 33 10 96 2 endmode mode "480x640-60"
35 # 640x480, 75 Hz, Non-Interlaced (31.50 MHz dotclock)
38 # Resolution 640 480
52 mode "640x480-75"
56 # 640x480, 85 Hz, Non-Interlaced (36.000 MHz dotclock)
59 # Resolution 640 480
73 mode "640x480-85"
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| /linux/lib/fonts/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
12 bool "Select compiled-in fonts"
29 This is the "high resolution" font for the VGA frame buffer (the one
35 Given the resolution provided by the frame buffer device, answer N
42 This is the "high resolution" font for the VGA frame buffer (the one
52 Small console font with Macintosh-style high-half glyphs. Some Mac
68 Small console font with PC-style control-character and high-half
76 Small console font with PC-style control characters and high-half
84 bool "Medium-size 6x10 font"
87 Medium-size console font. Suitable for framebuffer consoles on
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| /linux/Documentation/input/ |
| H A D | event-codes.rst | 1 .. _input-event-codes:
36 - Used as markers to separate events. Events may be separated in time or in
41 - Used to describe state changes of keyboards, buttons, or other key-like
46 - Used to describe relative axis value changes, e.g. moving the mouse 5 units
51 - Used to describe absolute axis value changes, e.g. describing the
56 - Used to describe miscellaneous input data that do not fit into other types.
60 - Used to describe binary state input switches.
64 - Used to turn LEDs on devices on and off.
68 - Used to output sound to devices.
72 - Used for autorepeating devices.
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| /linux/Documentation/hwmon/ |
| H A D | adm9240.rst | 10 Addresses scanned: I2C 0x2c - 0x2f
20 Addresses scanned: I2C 0x2c - 0x2f
24 http://pdfserv.maxim-ic.com/en/ds/DS1780.pdf
30 Addresses scanned: I2C 0x2c - 0x2f
37 - Frodo Looijaard <frodol@dds.nl>,
38 - Philip Edelbrock <phil@netroedge.com>,
39 - Michiel Rook <michiel@grendelproject.nl>,
40 - Grant Coady <gcoady.lk@gmail.com> with guidance
44 ---------
46 chip MSB 5-bit address. Each chip reports a unique manufacturer
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| H A D | w83793.rst | 10 Addresses scanned: I2C 0x2c - 0x2f
15 - Yuan Mu (Winbond Electronics)
16 - Rudolf Marek <r.marek@assembler.cz>
20 -----------------
36 -----------
44 sets of 6-pin CPU VID input.
47 If your motherboard maker used the reference design, the resolution of
48 voltage0-2 is 2mV, resolution of voltage3/4/5 is 16mV, 8mV for voltage6,
49 24mV for voltage7/8. Temp1-4 have a 0.25 degree Celsius resolution,
50 temp5-6 have a 1 degree Celsiis resolution.
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| H A D | tmp513.rst | 1 .. SPDX-License-Identifier: GPL-2.0
22 Eric Tremblay <etremblay@distech-controls.com>
25 -----------
28 The TMP512 (dual-channel) and TMP513 (triple-channel) are system monitors
29 that include remote sensors, a local temperature sensor, and a high-side current
31 temperatures, on-chip temperatures, and system voltage/power/current
35 -40 to + 125 degrees with a resolution of 0.0625 degree C.
40 0 to 127.5 degrees with a resolution of 0.5 degree.
44 **temp[1-4]_input**
46 **temp[1-4]_crit**
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| H A D | asc7621.rst | 20 Andigilog has both the PECI and pre-PECI versions of the Heceta-6, as
21 Intel calls them. Heceta-6e has high frequency PWM and Heceta-6p has
23 Heceta-6e part and aSC7621 is the Heceta-6p part. They are both in
27 specification. First enhancement is temperature reading resolution. We
28 have used registers below 20h for vendor-specific functions in addition
29 to those in the Intel-specified vendor range.
32 The fan speed control uses this finer value to produce a "step-less" fan
33 PWM output. These two bytes are "read-locked" to guarantee that once a
34 high or low byte is read, the other byte is locked-in until after the
35 next read of any register. So to get an atomic reading, read high or low
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| H A D | adt7410.rst | 14 https://www.analog.com/static/imported-files/data_sheets/ADT7410.pdf
23 https://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf
33 https://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf
43 https://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf
48 -----------
51 -55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a
52 resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an
56 common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events.
57 Both pins can individually set to be active-low or active-high, while the whole
64 package, a slightly narrower operating temperature range (-40°C to +150°C), and
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| H A D | da9055.rst | 14 -----------
17 resolution and track and hold circuitry combined with an analogue input
24 - Channel 0: VDDOUT - measurement of the system voltage
25 - Channel 1: ADC_IN1 - high impedance input (0 - 2.5V)
26 - Channel 2: ADC_IN2 - high impedance input (0 - 2.5V)
27 - Channel 3: ADC_IN3 - high impedance input (0 - 2.5V)
28 - Channel 4: Internal Tjunc. - sense (internal temp. sensor)
34 ------------------
48 ----------------------
55 Degrees celsius = -0.4084 * (ADC_RES - T_OFFSET) + 307.6332
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| /linux/Documentation/w1/slaves/ |
| H A D | w1_therm.rst | 16 -----------
46 in the module), it will drive the line high during the longer conversion
49 -1 if at least one sensor still in conversion, 1 if conversion is complete
61 its current resolution. Default conversion time is set by the driver according
70 Writing a resolution value (in bits) to ``w1_slave`` will change the
72 the sensor. Resolution is reset when the sensor gets power-cycled.
74 To store the current resolution in EEPROM, write ``0`` to ``w1_slave``.
78 Alternatively, resolution can be read or written using the dedicated
79 ``resolution`` entry on each device, if supported by the sensor.
81 Some non-genuine DS18B20 chips are fixed in 12-bit mode only, so the actual
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| /linux/include/sound/ac97/ |
| H A D | regs.h | 1 /* SPDX-License-Identifier: GPL-2.0+
33 /* range 0x28-0x3a - AUDIO AC'97 2.0 extensions */
44 /* range 0x3c-0x58 - MODEM */
54 #define AC97_GPIO_POLARITY 0x4e /* GPIO Pin Polarity/Type, 0=low, 1=high active */
59 /* range 0x5a-0x7b - Vendor Specific */
62 /* range 0x60-0x6f (page 1) - extended codec registers */
108 #define AC97_BC_16BIT_DAC 0x0000 /* 16-bit DAC resolution */
109 #define AC97_BC_18BIT_DAC 0x0040 /* 18-bit DAC resolution */
110 #define AC97_BC_20BIT_DAC 0x0080 /* 20-bit DAC resolution */
112 #define AC97_BC_16BIT_ADC 0x0000 /* 16-bit ADC resolution */
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| /linux/kernel/time/ |
| H A D | tick-oneshot.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains functions which manage high resolution tick
6 * Copyright(C) 2005-2006, Linutronix GmbH, Thomas Gleixner <tglx@kernel.org>
7 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
8 * Copyright(C) 2006-2007, Timesys Corp., Thomas Gleixner
18 #include "tick-internal.h"
21 * tick_program_event - program the CPU local timer device for the next event
36 dev->next_event = KTIME_MAX; in tick_program_event()
52 * tick_resume_oneshot - resume oneshot mode
63 * tick_setup_oneshot - setup the event device for oneshot mode (hres or nohz)
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| H A D | hrtimer.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright(C) 2005-2006, Linutronix GmbH, Thomas Gleixner <tglx@kernel.org>
4 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
5 * Copyright(C) 2006-2007 Timesys Corp., Thomas Gleixner
7 * High-resolution kernel timers
9 * In contrast to the low-resolution timeout API, aka timer wheel,
10 * hrtimers provide finer resolution and accuracy depending on system
51 #include "tick-internal.h"
62 * timer->base->cpu_base->running == timer
70 * All state transitions are protected by cpu_base->lock.
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| /linux/drivers/clocksource/ |
| H A D | scx200_hrt.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * high-resolution timer. The Geode SC-1100 (at least) has a buggy
8 * given as a boot-arg. In its absence, the Generic Timekeeping code
9 * will detect and de-rate the bad TSC, allowing this timer to take
12 * Based on work by John Stultz, and Ted Phelps (in a 2.6.12-rc6 patch)
29 MODULE_PARM_DESC(ppm, "+-adjust to actual XO freq (ppm)");
37 #define HR_TM27MPD (1 << 2) /* 1 turns off input clock (power-down) */
63 return -ENODEV; in init_hrt_clocksource()
65 /* Reserve the timer's ISA io-region for ourselves */ in init_hrt_clocksource()
68 "NatSemi SCx200 High-Resolution Timer")) { in init_hrt_clocksource()
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| /linux/tools/perf/pmu-events/arch/common/common/ |
| H A D | software.json | 4 "EventName": "cpu-clock",
5 "BriefDescription": "Per-CPU high-resolution timer based event",
7 "ScaleUnit": "1e-6msec"
11 "EventName": "task-clock",
12 "BriefDescription": "Per-task high-resolution timer based event",
14 "ScaleUnit": "1e-6msec"
19 "BriefDescription": "Number of page faults [This event is an alias of page-faults]",
24 "EventName": "page-faults",
30 "EventName": "context-switches",
37 "BriefDescription": "Number of context switches [This event is an alias of context-switches]",
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| /linux/Documentation/iio/ |
| H A D | ad7380.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
23 * `AD7380-4 <https://www.analog.com/en/products/ad7380-4.html>`_
24 * `AD7381-4 <https://www.analog.com/en/products/ad7381-4.html>`_
25 * `AD7383-4 <https://www.analog.com/en/products/ad7383-4.html>`_
26 * `AD7384-4 <https://www.analog.com/en/products/ad7384-4.html>`_
27 * `AD7386-4 <https://www.analog.com/en/products/ad7386-4.html>`_
28 * `AD7387-4 <https://www.analog.com/en/products/ad7387-4.html>`_
29 * `AD7388-4 <https://www.analog.com/en/products/ad7388-4.html>`_
30 * `AD7389-4 <https://www.analog.com/en/products/ad7389-4.html>`_
31 * `ADAQ4370-4 <https://www.analog.com/en/products/adaq4370-4.html>`_
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-driver-w1_therm | 5 (RW) read or write TH and TL (Temperature High an Low) alarms.
7 (typical -55 degC to 125 degC), if not values will be trimmed
11 master level, refer to Documentation/w1/w1-generic.rst for
41 * '-xx': xx is kernel error when reading power status
47 What: /sys/bus/w1/devices/.../resolution
51 (RW) get or set the device resolution (on supported devices,
52 if not, this entry is not present). Note that the resolution
55 values after power-on. Read or write are :
57 * '9..14': device resolution in bit
58 or resolution to set in bit
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| /linux/Documentation/devicetree/bindings/display/bridge/ |
| H A D | ti,dlpc3433.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jagan Teki <jagan@amarulasolutions.com>
11 - Christopher Vollo <chris@renewoutreach.org>
15 for processing high resolution DMD based projectors.
21 It supports upto 720p resolution with 60 and 120 Hz refresh
30 - 0x1b
31 - 0x1d
33 enable-gpios:
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| H A D | toshiba,tc358775.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Vinay Simha BN <simhavcs@gmail.com>
15 MIPI DSI-RX Data 4-lane, CLK 1-lane with data rates up to 800 Mbps/lane.
17 Up to 1600x1200 24-bit/pixel resolution for single-link LVDS display panel
19 Up to WUXGA (1920x1200 24-bit pixels) resolution for dual-link LVDS display
25 - toshiba,tc358765
26 - toshiba,tc358775
32 vdd-supply:
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| /linux/drivers/media/rc/ |
| H A D | ene_ir.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 #define ENE_STATUS 0 /* hardware status - unused */
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
130 /* detected RX carrier period (resolution: 500 ns) */
134 /* detected RX carrier pulse width (resolution: 500 ns) */
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| /linux/Documentation/devicetree/bindings/power/supply/ |
| H A D | bq24735.yaml | 1 # SPDX-License-Identifier: GPL-2.0
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: TI BQ24735 Li-Ion Battery Charger
11 - Sebastian Reichel <sre@kernel.org>
14 - $ref: power-supply.yaml#
27 ti,ac-detect-gpios:
33 absence despite ACOK being active (high) on AC adapter presence.
35 ti,charge-current:
39 This value must be between 128mA and 8.128A with a 64mA step resolution.
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| /linux/drivers/hwmon/ |
| H A D | lm90.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
5 * Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de>
9 * one external one) with a 0.125 deg resolution (1 deg for local
10 * temperature) and a 3-4 deg accuracy.
18 * When device is auto-detected, the driver will assume an LM99.
77 * pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
124 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
126 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
228 #define LM90_STATUS_RHIGH BIT(4) /* remote high temp limit tripped */
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| /linux/Documentation/driver-api/gpio/ |
| H A D | drivers-on-gpio.rst | 6 the right in-kernel and userspace APIs/ABIs for the job, and that these
10 - leds-gpio: drivers/leds/leds-gpio.c will handle LEDs connected to GPIO
13 - ledtrig-gpio: drivers/leds/trigger/ledtrig-gpio.c will provide a LED trigger,
14 i.e. a LED will turn on/off in response to a GPIO line going high or low
15 (and that LED may in turn use the leds-gpio as per above).
17 - gpio-keys: drivers/input/keyboard/gpio_keys.c is used when your GPIO line
20 - gpio-keys-polled: drivers/input/keyboard/gpio_keys_polled.c is used when your
24 - gpio_mouse: drivers/input/mouse/gpio_mouse.c is used to provide a mouse with
29 - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from
31 off/on, for an actual PWM waveform, see pwm-gpio below.)
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