| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/iio/adc/ |
| D | ti-adc12138.txt | 4 - compatible: Should be one of
8 - reg: SPI chip select number for the device
9 - interrupts: Should contain interrupt for EOC (end of conversion)
10 - clocks: phandle to conversion clock input
11 - spi-max-frequency: Definision as per
12 Documentation/devicetree/bindings/spi/spi-bus.txt
13 - vref-p-supply: The regulator supply for positive analog voltage reference
16 - vref-n-supply: The regulator supply for negative analog voltage reference
17 (Note that this must not go below GND or exceed vref-p)
19 - ti,acquisition-time: The number of conversion clock periods for the S/H's
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/iio/adc/ |
| D | ti,adc12138.yaml | 1 # 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
34 spi-max-frequency: true
36 vref-p-supply:
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/input/touchscreen/ |
| D | ad7879.txt | 1 * Analog Devices AD7879(-1)/AD7889(-1) touchscreen interface (SPI/I2C)
4 - compatible : for SPI slave, use "adi,ad7879"
5 for I2C slave, use "adi,ad7879-1"
6 - reg : SPI chipselect/I2C slave address
7 See spi-bus.txt for more SPI slave properties
8 - interrupts : touch controller interrupt
9 - touchscreen-max-pressure : maximum reported pressure
10 - adi,resistance-plate-x : total resistance of X-plate (for pressure
13 - touchscreen-swapped-x-y : X and Y axis are swapped (boolean)
14 - adi,first-conversion-delay : 0-12: In 128us steps (starting with 128us)
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/input/touchscreen/ |
| D | ad7879.txt | 1 * Analog Devices AD7879(-1)/AD7889(-1) touchscreen interface (SPI/I2C)
4 - compatible : for SPI slave, use "adi,ad7879"
5 for I2C slave, use "adi,ad7879-1"
6 - reg : SPI chipselect/I2C slave address
7 See spi-bus.txt for more SPI slave properties
8 - interrupts : touch controller interrupt
9 - touchscreen-max-pressure : maximum reported pressure
10 - adi,resistance-plate-x : total resistance of X-plate (for pressure
13 - touchscreen-swapped-x-y : X and Y axis are swapped (boolean)
14 - adi,first-conversion-delay : 0-12: In 128us steps (starting with 128us)
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| /kernel/linux/linux-5.10/drivers/staging/comedi/ |
| D | comedidev.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * header file for kernel-only structures, variables, and constants
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
13 #include <linux/dma-mapping.h>
29 * struct comedi_subdevice - Working data for a COMEDI subdevice
35 * the low-level driver.)
37 * low-level driver.)
39 * the COMEDI core and user application. (Initialized by the low-level
42 * asynchronous acquisition commands. (Optionally initialized by the
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| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
3 tristate "Data acquisition support (comedi)"
5 Enable support for a wide range of data acquisition devices
23 running at 10 kHz has of 2-4 seconds of buffer.
32 channels running at 100 kHz has 2-4 seconds of buffer.
41 the questions about misc non-hardware comedi drivers.
62 generate sample waveforms on systems that don't have data acquisition
80 tristate "SSV Embedded Systems DIL/Net-PC support"
83 Enable support for SSV Embedded Systems DIL/Net-PC
102 tristate "Advantech PCL-711/711b and ADlink ACL-8112 ISA card support"
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| /kernel/linux/linux-4.19/drivers/staging/comedi/ |
| D | comedidev.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * header file for kernel-only structures, variables, and constants
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
13 #include <linux/dma-mapping.h>
29 * struct comedi_subdevice - Working data for a COMEDI subdevice
35 * the low-level driver.)
37 * low-level driver.)
39 * the COMEDI core and user application. (Initialized by the low-level
42 * asynchronous acquisition commands. (Optionally initialized by the
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| D | comedi.h | 1 /* SPDX-License-Identifier: LGPL-2.0+ */
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 1998-2001 David A. Schleef <ds@schleef.org>
32 * NOTE: 'comedi_config --init-data' is deprecated
40 /* length of nth chunk of firmware data -*/
78 /* counters -- these are arbitrary values */
119 /* try to use a real-time interrupt while performing command */
122 /* wake up on end-of-scan events */
161 #define TRIG_TIME 0x00000008 /* trigger at time N ns */
165 #define TRIG_INT 0x00000080 /* trigger on comedi-internal signal N */
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| /kernel/linux/linux-5.10/drivers/media/dvb-frontends/ |
| D | stb0899_algo.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
50 struct stb0899_internal *internal = &state->internal;
55 return stb0899_calc_srate(internal->master_clk, sfr);
71 dprintk(state->verbose, FE_DEBUG, 1, "-->"); in stb0899_set_srate()
103 * Compute the amount of time needed by the derotator to lock
105 * return: derotator time constant (ms)
122 struct stb0899_internal *internal = &state->internal; in stb0899_carr_width()
124 return (internal->srate + (internal->srate * internal->rolloff) / 100); in stb0899_carr_width()
133 struct stb0899_internal *internal = &state->internal; in stb0899_first_subrange()
134 struct stb0899_params *params = &state->params; in stb0899_first_subrange()
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| /kernel/linux/linux-4.19/tools/memory-model/ |
| D | README | 40 $ herd7 -conf linux-kernel.cfg litmus-tests/SB+fencembonceonces.litmus
54 Time SB+fencembonceonces 0.01
60 See "herd7 -help" or "herdtools7/doc/" for more information.
73 $ klitmus7 -o mymodules litmus-tests/SB+fencembonceonces.litmus
90 Time SB+fencembonceonces 0.16
96 And, as with "herd7", please see "klitmus7 -help" or "herdtools7/doc/"
105 Quick-reference guide to the Linux-kernel memory model.
111 Lists common memory-ordering patterns.
116 linux-kernel.bell
118 references, memory barriers, atomic read-modify-write operations,
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| /kernel/linux/linux-4.19/drivers/media/dvb-frontends/ |
| D | stb0899_algo.c | 62 struct stb0899_internal *internal = &state->internal;
67 return stb0899_calc_srate(internal->master_clk, sfr);
83 dprintk(state->verbose, FE_DEBUG, 1, "-->"); in stb0899_set_srate()
115 * Compute the amount of time needed by the derotator to lock
117 * return: derotator time constant (ms)
134 struct stb0899_internal *internal = &state->internal; in stb0899_carr_width()
136 return (internal->srate + (internal->srate * internal->rolloff) / 100); in stb0899_carr_width()
145 struct stb0899_internal *internal = &state->internal; in stb0899_first_subrange()
146 struct stb0899_params *params = &state->params; in stb0899_first_subrange()
147 struct stb0899_config *config = state->config; in stb0899_first_subrange()
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| /kernel/linux/linux-5.10/tools/memory-model/ |
| D | README | 49 ----------------------------
53 ------------ ----------
54 -- 4.18 7.48 --
55 4.15 -- 4.19 7.49 --
56 4.20 -- 5.5 7.54 --
57 5.6 -- 7.56 --
68 tests is available in tools/memory-model/Documentation/litmus-tests.txt.
70 Example litmus tests may be found in the Linux-kernel source tree:
72 tools/memory-model/litmus-tests/
73 Documentation/litmus-tests/
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| /kernel/linux/linux-5.10/Documentation/RCU/Design/Memory-Ordering/ |
| D | Tree-RCU-Memory-Ordering.rst | 2 A Tour Through TREE_RCU's Grace-Period Memory Ordering
13 grace-period memory ordering guarantee is provided.
18 RCU grace periods provide extremely strong memory-ordering guarantees
19 for non-idle non-offline code.
22 period that are within RCU read-side critical sections.
25 of that grace period that are within RCU read-side critical sections.
27 Note well that RCU-sched read-side critical sections include any region
30 an extremely small region of preemption-disabled code, one can think of
37 a linked RCU-protected data structure, and phase two frees that element.
39 phase-one update (in the common case, removal) must not witness state
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| /kernel/linux/linux-4.19/Documentation/RCU/Design/Memory-Ordering/ |
| D | Tree-RCU-Memory-Ordering.html | 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
4 <head><title>A Tour Through TREE_RCU's Grace-Period Memory Ordering</title>
5 <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
13 grace-period memory ordering guarantee is provided.
28 <p>RCU grace periods provide extremely strong memory-ordering guarantees
29 for non-idle non-offline code.
32 period that are within RCU read-side critical sections.
35 of that grace period that are within RCU read-side critical sections.
38 for which RCU-sched read-side critical sections include any region
41 an extremely small region of preemption-disabled code, one can think of
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| /kernel/linux/linux-4.19/drivers/i2c/muxes/ |
| D | i2c-mux-pca9541.c | 6 * Author: Guenter Roeck <linux@roeck-us.net>
11 * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it>
12 * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it>
22 #include <linux/i2c-mux.h>
36 * single-channel I2C bus multiplexer.
40 * that only one of the masters is instantiated at any given time.
68 #define ARB2_TIMEOUT (HZ / 4) /* 250 ms until acquisition failure */
97 * as they will try to lock the adapter a second time.
101 struct i2c_adapter *adap = client->adapter; in pca9541_reg_write()
104 return __i2c_smbus_xfer(adap, client->addr, client->flags, in pca9541_reg_write()
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| /kernel/linux/linux-5.10/drivers/i2c/muxes/ |
| D | i2c-mux-pca9541.c | 6 * Author: Guenter Roeck <linux@roeck-us.net>
11 * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it>
12 * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it>
23 #include <linux/i2c-mux.h>
36 * single-channel I2C bus multiplexer.
40 * that only one of the masters is instantiated at any given time.
68 #define ARB2_TIMEOUT (HZ / 4) /* 250 ms until acquisition failure */
97 * as they will try to lock the adapter a second time.
101 struct i2c_adapter *adap = client->adapter; in pca9541_reg_write()
104 return __i2c_smbus_xfer(adap, client->addr, client->flags, in pca9541_reg_write()
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| /kernel/linux/linux-5.10/drivers/iio/adc/ |
| D | max1118.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * MAX1117/MAX1118/MAX1119 8-bit, dual-channel ADCs driver
7 * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf
13 * ------ --------- -----------
14 * nCS --> CNVST
15 * SCK --> SCLK
16 * MISO <-- DOUT
17 * ------ --------- -----------
76 * and low for a second time. in max1118_read()
80 .delay = { /* > CNVST Low Time 100 ns */ in max1118_read()
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| D | max1027.c | 1 // SPDX-License-Identifier: GPL-2.0-only
247 dev_warn(&indio_dev->dev, "trigger mode already enabled"); in max1027_read_single_value()
248 return -EBUSY; in max1027_read_single_value()
251 /* Start acquisition on conversion register write */ in max1027_read_single_value()
252 st->reg = MAX1027_SETUP_REG | MAX1027_REF_MODE2 | MAX1027_CKS_MODE2; in max1027_read_single_value()
253 ret = spi_write(st->spi, &st->reg, 1); in max1027_read_single_value()
255 dev_err(&indio_dev->dev, in max1027_read_single_value()
261 st->reg = MAX1027_CONV_REG | MAX1027_CHAN(chan->channel) | in max1027_read_single_value()
263 if (chan->type == IIO_TEMP) in max1027_read_single_value()
264 st->reg |= MAX1027_TEMP; in max1027_read_single_value()
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| /kernel/linux/linux-4.19/drivers/iio/adc/ |
| D | max1118.c | 2 * MAX1117/MAX1118/MAX1119 8-bit, dual-channel ADCs driver
10 * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf
16 * ------ --------- -----------
17 * nCS --> CNVST
18 * SCK --> SCLK
19 * MISO <-- DOUT
20 * ------ --------- -----------
78 * and low for a second time. in max1118_read()
82 .delay_usecs = 1, /* > CNVST Low Time 100 ns */ in max1118_read()
86 * The acquisition interval begins with the falling edge of in max1118_read()
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| D | max1027.c | 226 dev_warn(&indio_dev->dev, "trigger mode already enabled"); in max1027_read_single_value()
227 return -EBUSY; in max1027_read_single_value()
230 /* Start acquisition on conversion register write */ in max1027_read_single_value()
231 st->reg = MAX1027_SETUP_REG | MAX1027_REF_MODE2 | MAX1027_CKS_MODE2; in max1027_read_single_value()
232 ret = spi_write(st->spi, &st->reg, 1); in max1027_read_single_value()
234 dev_err(&indio_dev->dev, in max1027_read_single_value()
240 st->reg = MAX1027_CONV_REG | MAX1027_CHAN(chan->channel) | in max1027_read_single_value()
242 if (chan->type == IIO_TEMP) in max1027_read_single_value()
243 st->reg |= MAX1027_TEMP; in max1027_read_single_value()
244 ret = spi_write(st->spi, &st->reg, 1); in max1027_read_single_value()
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| /kernel/linux/linux-5.10/drivers/acpi/acpica/ |
| D | evglock.c | 1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: evglock - Global Lock support
6 * Copyright (C) 2000 - 2020, Intel Corp.
105 * PARAMETERS: context - From thread interface, not used
132 * Send a unit to the global lock semaphore. The actual acquisition in acpi_ev_global_lock_handler()
152 * PARAMETERS: timeout - Max time to wait for the lock, in millisec.
165 * allows only one thread to acquire the HW Global Lock at a time, and makes
179 * Only one thread can acquire the GL at a time, the global_lock_mutex in acpi_ev_acquire_global_lock()
183 acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex. in acpi_ev_acquire_global_lock()
195 * regardless of where the acquisition request originated. in acpi_ev_acquire_global_lock()
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| /kernel/linux/linux-4.19/drivers/acpi/acpica/ |
| D | evglock.c | 1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: evglock - Global Lock support
6 * Copyright (C) 2000 - 2018, Intel Corp.
105 * PARAMETERS: context - From thread interface, not used
132 * Send a unit to the global lock semaphore. The actual acquisition in acpi_ev_global_lock_handler()
152 * PARAMETERS: timeout - Max time to wait for the lock, in millisec.
165 * allows only one thread to acquire the HW Global Lock at a time, and makes
179 * Only one thread can acquire the GL at a time, the global_lock_mutex in acpi_ev_acquire_global_lock()
183 acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex. in acpi_ev_acquire_global_lock()
195 * regardless of where the acquisition request originated. in acpi_ev_acquire_global_lock()
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| /kernel/linux/linux-4.19/Documentation/virtual/kvm/ |
| D | locking.txt | 4 1. Acquisition Orders
5 ---------------------
7 The acquisition orders for mutexes are as follows:
9 - kvm->lock is taken outside vcpu->mutex
11 - kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock
13 - kvm->slots_lock is taken outside kvm->irq_lock, though acquiring
16 On x86, vcpu->mutex is taken outside kvm->arch.hyperv.hv_lock.
22 ------------
27 the mmu-lock on x86. Currently, the page fault can be fast in one of the
34 2. Write-Protection: The SPTE is present and the fault is
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| /kernel/linux/linux-5.10/drivers/iio/common/ssp_sensors/ |
| D | ssp_dev.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
54 .name = "ssp-accelerometer",
57 .name = "ssp-gyroscope",
63 gpiod_set_value(data->mcu_reset_gpiod, 0); in ssp_toggle_mcu_reset_gpio()
65 gpiod_set_value(data->mcu_reset_gpiod, 1); in ssp_toggle_mcu_reset_gpio()
74 if (data->available_sensors & BIT(i)) { in ssp_sync_available_sensors()
75 ret = ssp_enable_sensor(data, i, data->delay_buf[i]); in ssp_sync_available_sensors()
77 dev_err(&data->spi->dev, in ssp_sync_available_sensors()
85 data->mcu_dump_mode); in ssp_sync_available_sensors()
87 dev_err(&data->spi->dev, in ssp_sync_available_sensors()
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| /kernel/linux/linux-5.10/drivers/gpu/drm/i915/gt/ |
| D | selftest_engine_pm.c | 2 * SPDX-License-Identifier: GPL-2.0
23 * Check that if an engine supports busy-stats, they tell the truth. in live_engine_busy_stats()
27 return -ENOMEM; in live_engine_busy_stats()
42 err = -EBUSY; in live_engine_busy_stats()
48 ENGINE_TRACE(engine, "measuring idle time\n"); in live_engine_busy_stats()
57 engine->name, in live_engine_busy_stats()
60 err = -EINVAL; in live_engine_busy_stats()
66 engine->kernel_context, in live_engine_busy_stats()
75 intel_gt_set_wedged(engine->gt); in live_engine_busy_stats()
76 err = -ETIME; in live_engine_busy_stats()
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