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/linux/drivers/w1/slaves/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # 1-wire slaves configuration
6 menu "1-wire Slaves"
11 Say Y here if you want to connect 1-wire thermal sensors to your
12 wire.
17 Say Y here if you want to connect 1-wire
18 simple 64bit memory rom(ds2401/ds2411/ds1990*) to your wire.
23 Say Y or M here if you want to use a DS2405 1-wire
24 single-channel addressable switch.
25 This device can also work as a single-channel
[all …]
/linux/Documentation/w1/
H A Dw1-generic.rst2 Introduction to the 1-wire (w1) subsystem
5 The 1-wire bus is a simple master-slave bus that communicates via a single
6 signal wire (plus ground, so two wires).
18 - DS9490 usb device
19 - W1-over-GPIO
20 - DS2482 (i2c to w1 bridge)
21 - Emulated devices, such as a RS232 converter, parallel port adapter, etc
25 ------------------------------
29 - sysfs entries for that w1 master are created
30 - the w1 bus is periodically searched for new slave devices
[all …]
/linux/Documentation/devicetree/bindings/interrupt-controller/
H A Dintel,ce4100-lapic.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/intel,ce4100-lapic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rahul Tanwar <rtanwar@maxlinear.com>
28 [1] https://pdos.csail.mit.edu/6.828/2008/readings/ia32/IA32-3A.pdf
32 const: intel,ce4100-lapic
37 interrupt-controller: true
39 '#interrupt-cells':
42 intel,virtual-wire-mode:
[all …]
/linux/Documentation/devicetree/bindings/sound/
H A Dmt6359.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Eason Yen <eason.yen@mediatek.com>
11 - Jiaxin Yu <jiaxin.yu@mediatek.com>
12 - Shane Chien <shane.chien@mediatek.com>
20 mediatek,dmic-mode:
23 Indicates how many data pins are used to transmit two channels of PDM
24 signal. 0 means two wires, 1 means one wire. Default value is 0.
26 - 0 # one wire
[all …]
H A Dmediatek,mt8365-afe.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mediatek,mt8365-afe.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Alexandre Mergnat <amergnat@baylibre.com>
14 const: mediatek,mt8365-afe-pcm
19 "#sound-dai-cells":
24 - description: 26M clock
25 - description: mux for audio clock
26 - description: audio i2s0 mck
[all …]
H A Dmt6358.txt10 - compatible - "string" - One of:
11 "mediatek,mt6358-sound"
12 "mediatek,mt6366-sound"
13 - Avdd-supply : power source of AVDD
16 - mediatek,dmic-mode : Indicates how many data pins are used to transmit two
17 channels of PDM signal. 0 means two wires, 1 means one wire. Default
23 compatible = "mediatek,mt6358-sound";
24 Avdd-supply = <&mt6358_vaud28_reg>;
25 mediatek,dmic-mode = <0>;
/linux/drivers/w1/masters/
H A Dds2482.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * ds2482.c - provides i2c to w1-master bridge(s)
7 * It is a I2C to 1-wire bridge.
8 * There are two variations: -100 and -800, which have 1 or 8 1-wire ports.
10 * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4382
25 * The APU bit controls whether an active pullup (controlled slew-rate
27 * a 1-Wire line from low to high. When APU = 0, active pullup is disabled
29 * only a single slave on the 1-Wire line.
34 "0-disable, 1-enable (default)");
36 /* extra configurations - e.g. 1WS */
[all …]
/linux/Documentation/hwmon/
H A Dlm85.rst79 - Philip Pokorny <ppokorny@penguincomputing.com>,
80 - Frodo Looijaard <frodol@dds.nl>,
81 - Richard Barrington <rich_b_nz@clear.net.nz>,
82 - Margit Schubert-While <margitsw@t-online.de>,
83 - Justin Thiessen <jthiessen@penguincomputing.com>
86 -----------
92 The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
94 temperatures and five (5) voltages. It has four (4) 16-bit counters for
104 The temperatures measured are one internal diode, and two remote diodes.
127 ----------------
[all …]
H A Dasc7621.rst20 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
28 have used registers below 20h for vendor-specific functions in addition
29 to those in the Intel-specified vendor range.
31 Our conversion process produces a result that is reported as two bytes.
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
37 sheet says 10-bits of resolution, although you may find the lower bits
[all …]
H A Dlm95234.rst22 Author: Guenter Roeck <linux@roeck-us.net>
25 -----------
27 LM95233 and LM95234 are 11-bit digital temperature sensors with a 2-wire
29 that can very accurately monitor the temperature of two (LM95233)
32 graphics processors or diode-connected 2N3904s. The chip's TruTherm
37 is provided within a range of -127 to +255 degrees (+127.875 degrees for
42 affects the hysteresis on all channels. The first two external sensors also
H A Dtc654.rst13 - Chris Packham <chris.packham@alliedtelesis.co.nz>
14 - Masahiko Iwamoto <iwamoto@allied-telesis.co.jp>
17 -----------
20 The TC654 uses the 2-wire interface compatible with the SMBUS 2.0
21 specification. The TC654 has two (2) inputs for measuring fan RPM and
25 -------------------
/linux/Documentation/i2c/
H A Dsummary.rst6 a protocol developed by Philips. It is a two-wire protocol with variable
12 e.g. TWI (Two Wire Interface), IIC.
14 The latest official I2C specification is the `"I²C-bus specification and user
15 manual" (UM10204) <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_
36 .. kernel-figure:: i2c_bus.svg
59 video-related chips.
66 --------
75 --------------------
82 target. Work to replace the old terminology in the Linux Kernel is on-going.
/linux/drivers/block/drbd/
H A Ddrbd_protocol.h1 /* SPDX-License-Identifier: GPL-2.0-only */
33 P_SUPERSEDED = 0x18, /* Used in proto C, two-primaries conflict detection */
64 /* Only use these two if both support FF_THIN_RESYNC */
74 P_ZEROES = 0x36, /* data sock: zero-out, WRITE_ZEROES */
93 /* This is the layout for a packet on the wire.
154 u32 size; /* == bio->bi_size */
159 u32 size; /* == bio->bi_size */
166 * P_SUPERSEDED (proto C, two-primaries conflict detection)
193 /* supports TRIM/DISCARD on the "wire" protocol */
196 /* Detect all-zeros during resync, and rather TRIM/UNMAP/DISCARD those blocks
[all …]
/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_eeprom.c27 /* AT24CM02 and M24M02-R have a 256-byte write page size.
31 #define EEPROM_PAGE_MASK (EEPROM_PAGE_SIZE - 1)
35 /* EEPROM memory addresses are 19-bits long, which can
37 * The upper 3 bits are sent as part of the 7-bit
38 * "Device Type Identifier"--an I2C concept, which for EEPROM devices
39 * is hard-coded as 1010b, indicating that it is an EEPROM
40 * device--this is the wire format, followed by the upper
41 * 3 bits of the 19-bit address, followed by the direction,
42 * followed by two bytes holding the rest of the 16-bits of
43 * the EEPROM memory address. The format on the wire for EEPROM
[all …]
/linux/include/linux/
H A Dw1.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
12 * struct w1_reg_num - broken out slave device id
49 * struct w1_slave - holds a single slave device on the bus
51 * @owner: Points to the one wire "wire" kernel module.
84 * struct w1_bus_master - operations available on a bus master
93 * @touch_bit: the lowest-level function for devices that really support the
94 * 1-wire protocol.
95 * touch_bit(0) = write-0 cycle
96 * touch_bit(1) = write-1 / read cycle
109 * @triplet: Combines two reads and a smart write for ROM searches
[all …]
/linux/arch/arm64/boot/dts/mediatek/
H A Dmt8186-corsola-steelix-sku131072.dts1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
6 /dts-v1/;
7 #include "mt8186-corsola-steelix.dtsi"
11 compatible = "google,steelix-sku131072", "google,steelix",
13 chassis-type = "convertible";
17 mediatek,dmic-mode = <0>; /* two-wire */
/linux/Documentation/driver-api/
H A Di2c.rst5 the "Inter-IC" bus, a simple bus protocol which is widely used where low
7 some vendors use another name (such as "Two-Wire Interface", TWI) for
8 the same bus. I2C only needs two signals (SCL for clock, SDA for data),
12 I2C is a multi-master bus; open drain signaling is used to arbitrate
18 structured around two kinds of driver, and two kinds of device. An I2C
38 .. kernel-doc:: include/linux/i2c.h
41 .. kernel-doc:: drivers/i2c/i2c-boardinfo.c
44 .. kernel-doc:: drivers/i2c/i2c-core-base.c
47 .. kernel-doc:: drivers/i2c/i2c-core-smbus.c
/linux/Documentation/devicetree/bindings/watchdog/
H A Dzii,rave-sp-wdt.txt7 Documentation/devicetree/bindings/mfd/zii,rave-sp.txt)
11 - compatible: Depending on wire protocol implemented by RAVE SP
13 - "zii,rave-sp-watchdog"
14 - "zii,rave-sp-watchdog-legacy"
18 - wdt-timeout: Two byte nvmem cell specified as per
23 rave-sp {
24 compatible = "zii,rave-sp-rdu1";
25 current-speed = <38400>;
28 wdt_timeout: wdt-timeout@8E {
34 compatible = "zii,rave-sp-watchdog";
[all …]
/linux/include/linux/mfd/wm831x/
H A Dpdata.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * include/linux/mfd/wm831x/pdata.h -- Platform data for WM831x
40 * Configuration for the WM831x DC-DC BuckWise convertors. This
45 * configured as an input to switch between two output voltages,
73 int fivewire; /** 1 for five wire mode, 0 for 4 wire */
/linux/Documentation/devicetree/bindings/i2c/
H A Di2c-octeon.txt1 * Two Wire Serial Interface (TWSI) / I2C
3 - compatible: "cavium,octeon-3860-twsi"
9 compatible: "cavium,octeon-7890-twsi"
13 - reg: The base address of the TWSI/I2C bus controller register bank.
15 - #address-cells: Must be <1>.
17 - #size-cells: Must be <0>. I2C addresses have no size component.
19 - interrupts: A single interrupt specifier.
21 - clock-frequency: The I2C bus clock rate in Hz.
25 #address-cells = <1>;
26 #size-cells = <0>;
[all …]
/linux/Documentation/devicetree/bindings/media/i2c/
H A Dmt9m111.txt4 array size of 1280H x 1024V. It is programmable through a simple two-wire serial
8 - compatible: value should be "micron,mt9m111"
9 - clocks: reference to the master clock.
10 - clock-names: shall be "mclk".
13 sub-node for its digital output video port, in accordance with the video
15 Documentation/devicetree/bindings/media/video-interfaces.txt
18 - pclk-sample: For information see ../video-interfaces.txt. The value is set to
28 clock-names = "mclk";
32 remote-endpoint = <&pxa_camera>;
33 pclk-sample = <1>;
H A Dmt9v032.txt1 * Aptina 1/3-Inch WVGA CMOS Digital Image Sensor
3 The Aptina MT9V032 is a 1/3-inch CMOS active pixel digital image sensor with
5 two-wire serial interface.
9 - compatible: value should be either one among the following
21 - link-frequencies: List of allowed link frequencies in Hz. Each frequency is
22 expressed as a 64-bit big-endian integer.
23 - reset-gpios: GPIO handle which is connected to the reset pin of the chip.
24 - standby-gpios: GPIO handle which is connected to the standby pin of the chip.
27 Documentation/devicetree/bindings/media/video-interfaces.txt.
37 link-frequencies = /bits/ 64
/linux/drivers/spmi/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
8 SPMI (System Power Management Interface) is a two-wire
20 built-in SPMI PMIC Arbiter interface on Hisilicon 3670
31 built-in SPMI PMIC Arbiter interface on Qualcomm MSM family
42 built-in SPMI PMIC Arbiter interface on Mediatek family
/linux/Documentation/devicetree/bindings/powerpc/fsl/
H A Dmpc5200.txt2 ----------------------------
4 (c) 2006-2009 Secret Lab Technologies Ltd
8 ------------------
9 For mpc5200 on-chip devices, the format for each compatible value is
10 <chip>-<device>[-<mode>]. The OS should be able to match a device driver
11 to the device based solely on the compatible value. If two drivers
21 "fsl,mpc5200-<device>".
28 should have two items in the compatible list:
29 compatible = "fsl,mpc5200b-<device>","fsl,mpc5200-<device>";
34 ie. ethernet on mpc5200: compatible = "fsl,mpc5200-fec";
[all …]
/linux/Documentation/devicetree/bindings/fsi/
H A Dfsi-controller.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/fsi/fsi-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Eddie James <eajames@linux.ibm.com>
13 FSI (FRU (Field Replaceable Unit) Service Interface) is a two wire bus. The
18 "#address-cells":
21 "#size-cells":
24 '#interrupt-cells':
27 bus-frequency:
[all …]

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