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/linux/include/linux/mfd/
H A Dac100.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2016 Chen-Yu Tsai
7 * Chen-Yu Tsai <wens@csie.org>
92 #define AC100_ADC_DAP_L_L_A_C 0x87 /* Left Low Avg. Coef */
94 #define AC100_ADC_DAP_R_L_A_C 0x89 /* Right Low Avg. Coef */
99 #define AC100_ADC_DAP_N_TH 0x8e /* Noise Threshold */
100 #define AC100_ADC_DAP_L_H_N_A_C 0x8f /* Left High Noise Avg. Coef */
101 #define AC100_ADC_DAP_L_L_N_A_C 0x90 /* Left Low Noise Avg. Coef */
102 #define AC100_ADC_DAP_R_H_N_A_C 0x91 /* Right High Noise Avg. Coef */
103 #define AC100_ADC_DAP_R_L_N_A_C 0x92 /* Right Low Noise Avg. Coef */
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H A Dsi476x-reports.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * include/media/si476x-platform.h -- Definitions of the data formats
15 * struct si476x_rsq_status - structure containing received signal
18 * true - Indicatedes that the value is below
20 * false - Indicatedes that the value is above
22 * @multlint: Multipath Detect Low.
23 * true - Indicatedes that the value is below
25 * false - Indicatedes that the value is above
28 * true - Indicatedes that the value is below
30 * false - Indicatedes that the value is above
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/linux/Documentation/ABI/testing/
H A Dsysfs-bus-iio-adc-mcp35643 Contact: linux-iio@vger.kernel.org
6 circuit of the Delta-Sigma modulator. The different BOOST
12 Contact: linux-iio@vger.kernel.org
15 the current biasing circuit of the Delta-Sigma modulator.
19 Contact: linux-iio@vger.kernel.org
22 auto-zeroing algorithm (the input multiplexer and the ADC
26 input as VIN+/VIN-, one with VIN+/VIN- inverted. In this case the
30 ultra-low offset without any digital calibration. The resulting
32 conversions, which is on the order of magnitude of the noise
34 so the residual offset error temperature drift is extremely low.
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/linux/include/uapi/linux/media/raspberrypi/
H A Dpisp_be_config.h1 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
5 * Copyright (C) 2021 - Raspberry Pi Ltd
98 * struct pisp_be_global_config - PiSP global enable bitmaps
112 * struct pisp_be_input_buffer_config - PiSP Back End input buffer
116 /* low 3
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/linux/drivers/net/wireless/ath/ath5k/
H A Dani.c27 * Adaptive Noise Immunity (ANI) controls five noise immunity parameters
33 * - "noise immunity"
35 * - "spur immunity"
37 * - "firstep level"
39 * - "OFDM weak signal detection"
41 * - "CCK weak signal detection"
61 * ath5k_ani_set_noise_immunity_level() - Set noise immunity level
75 static const s8 lo[] = { -52, -56, -60, -64, -70 }; in ath5k_ani_set_noise_immunity_level()
76 static const s8 hi[] = { -18, -18, -16, -14, -12 }; in ath5k_ani_set_noise_immunity_level()
77 static const s8 sz[] = { -34, -41, -48, -55, -62 }; in ath5k_ani_set_noise_immunity_level()
[all …]
H A Dani.h40 * enum ath5k_ani_mode - mode for ANI / noise sensitivity
44 * @ATH5K_ANI_MODE_MANUAL_LOW: Manually set all immunity parameters to low,
60 * struct ath5k_ani_state - ANI state and associated counters
62 * @noise_imm_level: Noise immunity level
/linux/Documentation/userspace-api/media/dvb/
H A Dfrontend.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 - Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H,
16 - Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B)
18 - Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS
20 The Digital TV frontend controls several sub-devices including:
22 - Tuner
24 - Digital TV demodulator
26 - Low noise amplifier (LNA)
28 - Satellite Equipment Control (SEC) [#f1]_.
36 Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport)
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/linux/Documentation/devicetree/bindings/iio/adc/
H A Dadi,ad4080.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Analog Devices AD4080 20-Bit, 40 MSPS, Differential SAR ADC
11 - Antoniu Miclaus <antoniu.miclaus@analog.com>
14 The AD4080 is a high speed, low noise, low distortion, 20-bit, Easy Drive,
15 successive approximation register (SAR) analog-to-digital converter (ADC).
16 Maintaining high performance (signal-to-noise and distortion (SINAD) ratio
21 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4080.pdf
23 $ref: /schemas/spi/spi-peripheral-props.yaml#
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H A Dmicrochip,mcp3564.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marius Cristea <marius.cristea@microchip.com>
13 Bindings for the Microchip family of 153.6 ksps, Low-Noise 16/24-Bit
14 Delta-Sigma ADCs with an SPI interface. Datasheet can be found here:
16 …s/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP3561-2-4-Family-Data-Sheet-DS20006181…
18 …ds/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP3561_2_4R-Data-Sheet-DS200006391C.pdf
20 …ProductDocuments/DataSheets/MCP3461-2-4-Two-Four-Eight-Channel-153.6-ksps-Low-Noise-16-Bit-Delta-S…
22 …/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP3461-2-4R-Family-Data-Sheet-DS20006404…
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H A Dlltc,ltc2497.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Michael Hennerich <michael.hennerich@analog.com>
11 - Liam Beguin <liambeguin@gmail.com>
15 low noise, low power, 8-channel, 12-bit successive approximation ADC with an
18 https://www.analog.com/media/en/technical-documentation/data-sheets/2309fd.pdf
25 https://www.analog.com/media/en/technical-documentation/data-sheets/2497fb.pdf
26 https://www.analog.com/media/en/technical-documentation/data-sheets/2499fe.pdf
31 - lltc,ltc2309
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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/devicetree/bindings/iio/frequency/
H A Dadi,admv1014.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Antoniu Miclaus <antoniu.miclaus@analog.com>
21 - adi,admv1014
26 spi-max-frequency:
32 clock-names:
34 - const: lo_in
38 vcm-supply:
40 Common-mode voltage regulator.
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/linux/Documentation/input/devices/
H A Dcma3000_d0x.rst1 CMA3000-D0x Accelerometer
5 * VTI CMA3000-D0x
8 CMA3000-D0X Product Family Specification 8281000A.02.pdf
15 -----------
17 CMA3000 Tri-axis accelerometer supports Motion detect, Measurement and
21 Its the low power mode where interrupts are generated only
47 -------------
50 Noise on X Axis
53 Noise on Y Axis
56 Noise on Z Axis
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/linux/drivers/net/wireless/intel/iwlwifi/mld/
H A Dscan.h1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright (C) 2024-2025 Intel Corporation
53 return SCAN_OFFLOAD_PROBE_REQ_SIZE - DRIVER_TOTAL_IES_LEN; in iwl_mld_scan_max_template_size()
66 /* enum iwl_mld_pass_all_sched_results_states - Defines the states for
82 * enum iwl_mld_traffic_load - Levels of traffic load
84 * @IWL_MLD_TRAFFIC_LOW: low traffic load
95 * struct iwl_mld_scan - Scan data
143 * struct iwl_mld_survey_channel - per-channel survey information
149 * @noise: channel noise in dBm
154 s8 noise; member
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/linux/drivers/media/pci/cx88/
H A Dcx88-dsp.c1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #include "cx88-reg.h"
77 return -int_cos(x - INT_PI); in int_cos()
80 return -int_cos(INT_PI / 2 - (x % (INT_PI / 2))); in int_cos()
89 ret = 32768 - t2 + t4 - t6 + t8; in int_cos()
108 s32 s = x[i] + ((s64)coeff * s_prev / 32768) - s_prev2; in int_goertzel()
114 tmp = (s64)s_prev2 * s_prev2 + (s64)s_prev * s_prev - in int_goertzel()
118 * XXX: N must be low enough so that N*N fits in s32. in int_goertzel()
142 /* The last 192 samples are enough for noise detection */ in noise_magnitude()
143 x += (N - 192); in noise_magnitude()
[all …]
/linux/Documentation/devicetree/bindings/gnss/
H A Dgnss-common.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gnss/gnss-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Johan Hovold <johan@kernel.org>
21 lna-supply:
22 description: A separate regulator supplying power for the Low Noise
26 enable-gpios:
28 asserted. If this line is active low, the GPIO phandle should
33 timepulse-gpios:
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/linux/Documentation/devicetree/bindings/sound/
H A Drichtek,rt9123.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - ChiYuan Huang <cy_huang@richtek.com>
13 RT9123 is a 3.2W mono Class-D audio amplifier that features high efficiency
14 and performance with ultra-low quiescent current. The digital audio interface
15 support various formats, including I2S, left-justified, right-justified, and
18 RTQ9124 is an ultra-low output noise, digital input, mono-channel Class-D
20 both DC and AC load diagnostics, as well as real-time load monitoring to
25 - $ref: dai-common.yaml#
[all …]
H A Dawinic,aw87390.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Weidong Wang <wangweidong.a@awinic.com>
15 sound quallity, which is a new high efficiency, low
16 noise, constant large volume, 6th Smart K audio amplifier.
19 - $ref: dai-common.yaml#
28 "#sound-dai-cells":
31 awinic,audio-channel:
40 - compatible
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H A Drichtek,rtq9128.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - ChiYuan Huang <cy_huang@richtek.com>
13 The RTQ9128 is a ultra-low output noise, high-efficiency, four-channel
14 class-D audio power amplifier and delivering 4x75W into 4OHm at 10%
18 - $ref: dai-common.yaml#
23 - richtek,rtq9128
28 enable-gpios:
31 richtek,tdm-input-data2-select:
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H A Dst,sta350.txt7 - compatible: "st,sta350"
8 - reg: the I2C address of the device for I2C
9 - reset-gpios: a GPIO spec for the reset pin. If specified, it will be
12 - power-down-gpios: a GPIO spec for the power down pin. If specified,
16 - vdd-dig-supply: regulator spec, providing 3.3V
17 - vdd-pll-supply: regulator spec, providing 3.3V
18 - vcc-supply: regulator spec, providing 5V - 26V
22 - st,output-conf: number, Selects the output configuration:
23 0: 2-channel (full-bridge) power, 2-channel data-out
24 1: 2 (half-bridge). 1 (full-bridge) on-board power
[all …]
/linux/drivers/media/dvb-frontends/
H A Dlgdt330x.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Support for LGDT3302 and LGDT3303 - VSB/QAM
12 * DViCO FusionHDTV 3 Gold-Q
13 * DViCO FusionHDTV 3 Gold-T
44 dev_printk(KERN_DEBUG, &state->client->dev, fmt, ##arg);\
72 for (i = 0; i < len - 1; i += 2) { in i2c_write_demod_bytes()
73 err = i2c_master_send(state->client, buf, 2); in i2c_write_demod_bytes()
75 dev_warn(&state->client->dev, in i2c_write_demod_bytes()
76 "%s: error (addr %02x <- %02x, err = %i)\n", in i2c_write_demod_bytes()
81 return -EREMOTEIO; in i2c_write_demod_bytes()
[all …]
/linux/Documentation/devicetree/bindings/iio/accel/
H A Dadi,adxl380.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Analog Devices ADXL380/382 3-Axis Digital Accelerometer
10 - Ramona Gradinariu <ramona.gradinariu@analog.com>
11 - Antoniu Miclaus <antoniu.miclaus@analog.com>
14 The ADXL380/ADXL382 is a low noise density, low power, 3-axis
24 - adi,adxl380
25 - adi,adxl382
34 interrupt-names:
[all …]
/linux/Documentation/driver-api/thermal/
H A Dintel_dptf.rst1 .. SPDX-License-Identifier: GPL-2.0
12 ------------
31 ----------------------------
43 "42A441D6-AE6A-462b-A84B-4A8CE79027D3" : Passive 1
45 "3A95C389-E4B8-4629-A526-C52C88626BAE" : Active
47 "97C68AE7-15FA-499c-B8C9-5DA81D606E0A" : Critical
49 "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D" : Adaptive performance
51 "5349962F-71E6-431D-9AE8-0A635B710AEE" : Emergency call
53 "9E04115A-AE87-4D1C-9500-0F3E340BFE75" : Passive 2
55 "F5A35014-C209-46A4-993A-EB56DE7530A1" : Power Boss
[all …]
/linux/Documentation/sound/hd-audio/
H A Drealtek-pc-beep.rst20 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
24 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
41 Loopback 1Ah to 21h [active low] (h): 1 bit
58 +--DIV--+--!DIV--+ {1Ah boost control}
60 +--(b == 0)--+--(b != 0)--+
70 +-----!h-----+-----S-----+
79 All Realtek HDA codecs have a vendor-defined widget with node ID 20h which
107 poorly shielded and picks up chassis noise (both of which are the case on my
118 causes terrible headphone noise, the character of which is controlled by the
120 noise by changing "Headphone Mic Boost" in ALSA, now you know why.)
[all …]
/linux/drivers/net/wireless/realtek/rtw88/
H A Drtw8703b.h1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
15 /* masks for assembling LNA index from high and low bits */
37 /* for CCK: bits 0:4: VGA index, bits 5:7: LNA index (low) */
91 #define REG_OFDM0_TX_PSD_NOISE 0x0ce4 /* TX pseudo noise weighting */

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