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/linux/Documentation/devicetree/bindings/clock/
H A Dfixed-clock.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/clock/fixed-clock.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Simple fixed-rate clock sources
10 - Michael Turquette <mturquette@baylibre.com>
11 - Stephen Boyd <sboyd@kernel.org>
16 - description:
17 Preferred name is 'clock-<freq>' with <freq> being the output
18 frequency as defined in the 'clock-frequency' property.
[all …]
/linux/drivers/clk/
H A Dclk-fixed-rate.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
4 * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <mturquette@linaro.org>
6 * Fixed rate clock implementation
9 #include <linux/clk-provider.h>
18 * DOC: basic fixed-rate clock that cannot gate
20 * Traits of this clock:
21 * prepare - clk_(un)prepare only ensures parents are prepared
22 * enable - clk_enable only ensures parents are enabled
23 * rate - rate is always a fixed value. No clk_set_rate support
[all …]
H A Dkunit_clk_fixed_rate_test.dtso1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
5 #include "clk-fixed-rate_test.h"
8 fixed_50MHz: kunit-clock {
9 compatible = "fixed-clock";
10 #clock-cells = <0>;
11 clock-frequency = <TEST_FIXED_FREQUENCY>;
12 clock-accuracy = <TEST_FIXED_ACCURACY>;
15 kunit-clock-consumer {
16 compatible = "test,single-clk-consumer";
H A Dclk.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
4 * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
6 * Standard functionality for the common clock API. See Documentation/driver-api/clk.rst
9 #include <linux/clk/clk-conf.h>
12 #include <linux/clk-provider.h>
91 unsigned long accuracy; member
123 if (!core->rpm_enabled) in clk_pm_runtime_get()
126 return pm_runtime_resume_and_get(core->dev); in clk_pm_runtime_get()
131 if (!core->rpm_enabled) in clk_pm_runtime_put()
[all …]
/linux/Documentation/timers/
H A Dtimekeeping.rst2 Clock sources, Clock events, sched_clock() and delay timers
10 If you grep through the kernel source you will find a number of architecture-
11 specific implementations of clock sources, clockevents and several likewise
12 architecture-specific overrides of the sched_clock() function and some
15 To provide timekeeping for your platform, the clock source provides
16 the basic timeline, whereas clock events shoot interrupts on certain points
17 on this timeline, providing facilities such as high-resolution timers.
22 Clock sources
23 -------------
25 The purpose of the clock source is to provide a timeline for the system that
[all …]
/linux/Documentation/hwmon/
H A Dpc87360.rst22 -----------------
27 - 0: None
28 - **1**: Forcibly enable internal voltage and temperature channels,
30 - 2: Forcibly enable all voltage and temperature channels, except in9
31 - 3: Forcibly enable all voltage and temperature channels, including in9
42 -----------
56 PC87360 - 2 2 - 0xE1
57 PC87363 - 2 2 - 0xE8
58 PC87364 - 3 3 - 0xE4
60 PC87366 11 3 3 3-4 0xE9
[all …]
H A Dshtc1.rst41 -----------
48 address 0x70. See Documentation/i2c/instantiating-devices.rst for methods to
53 1. blocking (pull the I2C clock line down while performing the measurement) or
54 non-blocking mode. Blocking mode will guarantee the fastest result but
55 the I2C bus will be busy during that time. By default, non-blocking mode
56 is used. Make sure clock-stretching works properly on your device if you
58 2. high or low accuracy. High accuracy is used by default and using it is
61 sysfs-Interface
62 ---------------
65 - temperature input
[all …]
H A Dlm63.rst45 -----------
53 - No low limit for local temperature.
54 - No critical limit for local temperature.
55 - Critical limit for remote temperature can be changed only once. We
56 will consider that the critical limit is read-only.
67 store the value in an 8-bit register and have a selectable clock divider
68 to make sure that the result will fit in the register, the LM63 uses 16-bit
93 The LM96163 is an enhanced version of LM63 with improved temperature accuracy
/linux/arch/arm/boot/dts/alphascale/
H A Dalphascale-asm9260.dtsi2 * Copyright 2014 Oleksij Rempel <linux@rempel-privat.de>
7 #include <dt-bindings/clock/alphascale,asm9260.h>
10 #address-cells = <1>;
11 #size-cells = <1>;
12 interrupt-parent = <&icoll>;
20 #address-cells = <0>;
21 #size-cells = <0>;
24 compatible = "arm,arm926ej-s";
31 compatible = "fixed-clock";
32 #clock-cells = <0>;
[all …]
/linux/Documentation/sound/designs/
H A Dtimestamping.rst7 - Trigger_tstamp is the system time snapshot taken when the .trigger
11 estimate with a delay. In the latter two cases, the low-level driver
17 - tstamp is the current system timestamp updated during the last
19 The difference (tstamp - trigger_tstamp) defines the elapsed time.
29 - ``avail`` reports how much can be written in the ring buffer
30 - ``delay`` reports the time it will take to hear a new sample after all
43 ascii-art, this could be represented as follows (for the playback
47 --------------------------------------------------------------> time
53 |< codec delay >|<--hw delay-->|<queued samples>|<---avail->|
54 |<----------------- delay---------------------->| |
[all …]
/linux/arch/arm/boot/dts/intel/pxa/
H A Dpxa300-raumfeld-tuneable-clock.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 #include <dt-bindings/clock/maxim,max9485.h>
6 xo_27mhz: oscillator-27mhz {
7 compatible = "fixed-clock";
8 #clock-cells = <0>;
9 clock-frequency = <27000000>;
10 clock-accuracy = <100>;
14 compatible = "simple-audio-card";
15 simple-audio-card,name = "Raumfeld Speaker";
16 #address-cells = <1>;
[all …]
H A Dpxa300-raumfeld-speaker-one.dts1 // SPDX-License-Identifier: GPL-2.0
3 /dts-v1/;
5 #include "pxa300-raumfeld-common.dtsi"
9 compatible = "raumfeld,raumfeld-speaker-one-pxa303", "marvell,pxa300";
13 #sound-dai-cells = <0>;
14 Vdd-supply = <&reg_3v3>;
15 Vdda-supply = <&reg_va_5v0>;
18 xo_11mhz: oscillator-11mhz {
19 compatible = "fixed-clock";
20 #clock-cells = <0>;
[all …]
/linux/drivers/clk/at91/
H A Ddt-compat.c1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/clk-provider.h>
33 const char *name = np->name; in of_sama5d2_clk_audio_pll_frac_setup()
53 "atmel,sama5d2-clk-audio-pll-frac",
59 const char *name = np->name; in of_sama5d2_clk_audio_pll_pad_setup()
79 "atmel,sama5d2-clk-audio-pll-pad",
85 const char *name = np->name; in of_sama5d2_clk_audio_pll_pmc_setup()
105 "atmel,sama5d2-clk-audio-pll-pmc",
161 if (of_property_read_string(np, "clock-output-names", &name)) in of_sama5d2_clk_generated_setup()
162 name = gcknp->name; in of_sama5d2_clk_generated_setup()
[all …]
/linux/drivers/video/fbdev/kyro/
H A DSTG4000InitDevice.c41 /* Core clock freq */
44 /* Reference Clock freq */
61 /* PLL Clock */
101 /* Program SD-RAM interface */ in InitSDRAMRegisters()
129 /* Translate clock in Hz */ in ProgramClock()
133 /* Work out acceptable clock in ProgramClock()
134 * The method calculates ~ +- 0.4% (1/256) in ProgramClock()
136 ulMinClock = coreClock - (coreClock >> 8); in ProgramClock()
139 /* Scale clock required for use in calculations */ in ProgramClock()
147 /* loop for pre-divider from min to max */ in ProgramClock()
[all …]
/linux/include/linux/
H A Dhrtimer_defs.h1 /* SPDX-License-Identifier: GPL-2.0 */
14 * idea of the (in)accuracy of timers. Timer values are rounded up to
36 * struct hrtimer_clock_base - the timer base for a specific clock
37 * @cpu_base: per cpu clock base
38 * @index: clock type index for per_cpu support when moving a
40 * @clockid: clock id for per_cpu support
44 * @offset: offset of this clock to the monotonic base
69 * struct hrtimer_cpu_base - the per cpu clock bases
70 * @lock: lock protecting the base and associated clock bases
74 * @clock_was_set_seq: Sequence counter of clock was set events
[all …]
/linux/Documentation/devicetree/bindings/iio/adc/
H A Dti,adc12138.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Texas Instruments ADC12138 and similar self-calibrating ADCs
10 - Akinobu Mita <akinobu.mita@gmail.com>
19 - ti,adc12130
20 - ti,adc12132
21 - ti,adc12138
32 description: Conversion clock input.
34 vref-p-supply:
[all …]
/linux/Documentation/devicetree/bindings/mtd/
H A Dlpc32xx-mlc.txt4 - compatible: "nxp,lpc3220-mlc"
5 - reg: Address and size of the controller
6 - interrupts: The NAND interrupt specification
7 - gpios: GPIO specification for NAND write protect
11 Hz, to make them independent of actual clock speed and to provide for good
12 accuracy:)
13 - nxp,tcea_delay: TCEA_DELAY
14 - nxp,busy_delay: BUSY_DELAY
15 - nxp,nand_ta: NAND_TA
16 - nxp,rd_high: RD_HIGH
[all …]
/linux/drivers/crypto/intel/qat/qat_common/
H A Dadf_clock.c1 // SPDX-License-Identifier: GPL-2.0-only
58 delta_us = timespec_to_us(&ts2) - timespec_to_us(&ts1); in measure_clock()
59 } while (delta_us > MEASURE_CLOCK_DELTA_THRESHOLD_US && --tries); in measure_clock()
62 dev_err(&GET_DEV(accel_dev), "Excessive clock measure delay\n"); in measure_clock()
63 return -ETIMEDOUT; in measure_clock()
74 return -EIO; in measure_clock()
77 delta_us = timespec_to_us(&ts4) - timespec_to_us(&ts3); in measure_clock()
78 } while (delta_us > MEASURE_CLOCK_DELTA_THRESHOLD_US && --tries); in measure_clock()
81 dev_err(&GET_DEV(accel_dev), "Excessive clock measure delay\n"); in measure_clock()
82 return -ETIMEDOUT; in measure_clock()
[all …]
/linux/Documentation/devicetree/bindings/iio/pressure/
H A Dhoneywell,hsc030pa.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
23 pressure-triplet (directly extracted from the part number) or in case it's
27 by the sensor. pmin-pascal and pmax-pascal corespond to the minimum and
30 Please note that in case of an SPI-based sensor, the clock signal should not
34 …-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/bo…
35 …-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/bo…
38 - Petre Rodan <petre.rodan@subdimension.ro>
47 honeywell,transfer-function:
[all …]
/linux/kernel/time/
H A Djiffies.c1 // SPDX-License-Identifier: GPL-2.0+
13 #include "tick-internal.h"
23 * denominator clock source which should function on
30 * for "tick-less" systems.
84 refined_jiffies.name = "refined-jiffies"; in register_refined_jiffies()
89 /* shift_hz stores hz<<8 for extra accuracy */ in register_refined_jiffies()
/linux/arch/x86/kernel/
H A Dpvclock.c1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* paravirtual clock -- common code used by kvm/xen
31 do_div(pv_tsc_khz, src->tsc_to_system_mul); in pvclock_tsc_khz()
32 if (src->tsc_shift < 0) in pvclock_tsc_khz()
33 pv_tsc_khz <<= -src->tsc_shift; in pvclock_tsc_khz()
35 pv_tsc_khz >>= src->tsc_shift; in pvclock_tsc_khz()
61 flags = src->flags; in pvclock_read_flags()
78 flags = src->flags; in __pvclock_clocksource_read()
82 src->flags &= ~PVCLOCK_GUEST_STOPPED; in __pvclock_clocksource_read()
94 * does not sacrifice accuracy. in __pvclock_clocksource_read()
[all …]
/linux/tools/perf/Documentation/
H A Dperf-stat.txt1 perf-stat(1)
5 ----
6 perf-stat - Run a command and gather performance counter statistics
9 --------
11 'perf stat' [-e <EVENT> | --event=EVENT] [-a] <command>
12 'perf stat' [-e <EVENT> | --event=EVENT] [-a] \-- <command> [<options>]
13 'perf stat' [-e <EVENT> | --event=EVENT] [-a] record [-o file] \-- <command> [<options>]
14 'perf stat' report [-i file]
17 -----------
23 -------
[all …]
/linux/arch/arm/boot/dts/allwinner/
H A Dsun8i-v3s.dtsi5 * This file is dual-licensed: you can use it either under the terms
44 #include <dt-bindings/interrupt-controller/arm-gic.h>
45 #include <dt-bindings/clock/sun6i-rtc.h>
46 #include <dt-bindings/clock/sun8i-v3s-ccu.h>
47 #include <dt-bindings/reset/sun8i-v3s-ccu.h>
48 #include <dt-bindings/clock/sun8i-de2.h>
51 #address-cells = <1>;
52 #size-cells = <1>;
53 interrupt-parent = <&gic>;
56 #address-cells = <1>;
[all …]
/linux/Documentation/core-api/
H A Dtimekeeping.rst10 ------------------------------
13 that return time for different clock references:
56 clocksource without (NTP) adjustments for clock drift. This is
60 -----------------------------------------
92 Return a coarse-grained version of the time as a scalar
93 time64_t. This avoids accessing the clock hardware and rounds
98 -------------------------
117 These are quicker than the non-coarse versions, but less accurate,
125 in a fast path and one still expects better than second accuracy,
127 Skipping the hardware clock access saves around 100 CPU cycles
[all …]
/linux/include/uapi/linux/
H A Drtc.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
4 * This version contains the part of the user interface to the Real Time Clock
6 * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
9 * Copyright (C) 1999 Hewlett-Packard Co.
22 * source is self contained, allowing cross-compiles, etc. etc.
54 * +ve pll_value means clock will run faster by
56 * -ve pll_value means clock will run slower by
64 int pll_min; /* max -ve (slower) adjustment value */
66 int pll_negmult; /* factor for -ve correction */
116 #define RTC_VL_ACCURACY_LOW _BITUL(3) /* Voltage is low, RTC accuracy is reduced */

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