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/openbmc/linux/Documentation/devicetree/bindings/hwmon/
H A Dntc-thermistor.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 ---
3 $id: http://devicetree.org/schemas/hwmon/ntc-thermistor.yaml#
4 $schema: http://devicetree.org/meta-schemas/core.yaml#
9 - Linus Walleij <linus.walleij@linaro.org>
13 vary in resistance in an often non-linear way in relation to temperature.
16 temperature is non-linear, software drivers most often need to use a look
19 When used in practice, a thermistor is often connected between ground, a
20 pull-up resistor or/and a pull-down resistor and a fixed voltage like this:
22 + e.g. 5V = pull-up voltage (puv)
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/openbmc/linux/Documentation/hwmon/
H A Dpcf8591.rst17 - Aurelien Jarno <aurelien@aurel32.net>
18 - valuable contributions by Jan M. Sendler <sendler@sendler.de>,
19 - Jean Delvare <jdelvare@suse.de>
23 -----------
25 The PCF8591 is an 8-bit A/D and D/A converter (4 analog inputs and one
29 The PCF8591 has 4 analog inputs programmable as single-ended or
32 - mode 0 : four single ended inputs
35 - mode 1 : three differential inputs
37 Pins AIN0 to AIN2 are positive differential inputs for channels 0 to 2
39 - mode 2 : single ended and differential mixed
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/openbmc/linux/Documentation/devicetree/bindings/iio/adc/
H A Dadi,ad7124.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Stefan Popa <stefan.popa@analog.com>
16 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7124-8.pdf
21 - adi,ad7124-4
22 - adi,ad7124-8
32 clock-names:
34 - const: mclk
40 '#address-cells':
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H A Dadi,max11410.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Ibrahim Tilki <Ibrahim.Tilki@analog.com>
21 - adi,max11410
30 interrupt-names:
34 - enum: [gpio0, gpio1]
35 - const: gpio1
37 '#address-cells':
40 '#size-cells':
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/openbmc/linux/include/linux/iio/dac/
H A Dad5791.h1 /* SPDX-License-Identifier: GPL-2.0-only */
12 * struct ad5791_platform_data - platform specific information
13 * @vref_pos_mv: Vdd Positive Analog Supply Volatge (mV)
15 * @use_rbuf_gain2: ext. amplifier connected in gain of two configuration
/openbmc/linux/fs/overlayfs/
H A Dnamei.c1 // SPDX-License-Identifier: GPL-2.0-only
38 struct ovl_fs *ofs = OVL_FS(d->sb); in ovl_check_redirect()
40 d->absolute_redirect = false; in ovl_check_redirect()
46 d->absolute_redirect = true; in ovl_check_redirect()
50 * that will stop further lookup in lower layers (d->stop=true) in ovl_check_redirect()
53 * layers (reset d->stop). in ovl_check_redirect()
55 d->stop = false; in ovl_check_redirect()
59 memcpy(buf, d->name.name, prelen); in ovl_check_redirect()
63 kfree(d->redirect); in ovl_check_redirect()
64 d->redirect = buf; in ovl_check_redirect()
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H A Dexport.c1 // SPDX-License-Identifier: GPL-2.0-only
7 * Copyright (C) 2017-2018 CTERA Networks. All Rights Reserved.
41 * Before encoding a non-upper directory file handle from real layer N, we need
44 * "layer N connected" ancestor and verifying that all parents along the way are
47 * making that ancestor "layer N connected". For example:
55 * in ovl_lookup_real_ancestor() will not be able to lookup a connected overlay
56 * dentry from the connected lower dentry /a/b/c.
60 * /a/b. After copy up (and index) of /a/b, it will become "layer 2 connected"
63 * a connected overlay dentry will be accomplished.
67 * layer 1. If that improvement is made, then the check for "layer N connected"
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/openbmc/linux/Documentation/devicetree/bindings/bus/
H A Dmoxtet.txt4 - compatible : Should be "cznic,moxtet"
5 - #address-cells : Has to be 1
6 - #size-cells : Has to be 0
7 - spi-cpol : Required inverted clock polarity
8 - spi-cpha : Required shifted clock phase
9 - interrupts : Must contain reference to the shared interrupt line
10 - interrupt-controller : Required
11 - #interrupt-cells : Has to be 1
14 ../spi/spi-bus.txt.
17 - reg : Should be position on the Moxtet bus (how many Moxtet
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/openbmc/linux/Documentation/devicetree/bindings/iio/amplifiers/
H A Dadi,hmc425a.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: HMC425A 6-bit Digital Step Attenuator
10 - Michael Hennerich <michael.hennerich@analog.com>
14 HMC425A 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
15 https://www.analog.com/media/en/technical-documentation/data-sheets/hmc425A.pdf
20 - adi,hmc425a
22 vcc-supply: true
24 ctrl-gpios:
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/openbmc/linux/Documentation/ABI/testing/
H A Dsysfs-bus-iio-timer-stm328 - "reset"
11 - "enable"
14 - "update"
18 - "compare_pulse"
19 The trigger output send a positive pulse
21 - "OC1REF"
23 - "OC2REF"
25 - "OC3REF"
27 - "OC4REF"
32 - "OC5REF"
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H A Dsysfs-bus-iio3 Contact: linux-iio@vger.kernel.org
11 Contact: linux-iio@vger.kernel.org
25 Contact: linux-iio@vger.kernel.org
31 Contact: linux-iio@vger.kernel.org
38 Contact: linux-iio@vger.kernel.org
44 The contents of the label are free-form, but there are some
51 * "proximity-wifi"
52 * "proximity-lte"
53 * "proximity-wifi-lte"
54 * "proximity-wifi-left"
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/openbmc/linux/Documentation/devicetree/bindings/display/panel/
H A Dmantix,mlaf057we51-x.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/panel/mantix,mlaf057we51-x.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Mantix MLAF057WE51-X 5.7" 720x1440 TFT LCD panel
10 - Guido Günther <agx@sigxcpu.org>
13 Mantix MLAF057WE51 X is a 720x1440 TFT LCD panel connected using
14 a MIPI-DSI video interface.
17 - $ref: panel-common.yaml#
22 - mantix,mlaf057we51-x
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/openbmc/linux/fs/exportfs/
H A Dexpfs.c1 // SPDX-License-Identifier: GPL-2.0-only
30 const struct export_operations *nop = dir->d_sb->s_export_op; in exportfs_get_name()
33 if (nop->get_name) in exportfs_get_name()
34 return nop->get_name(dir, name, child); in exportfs_get_name()
53 inode = result->d_inode; in find_acceptable_alias()
54 spin_lock(&inode->i_lock); in find_acceptable_alias()
55 hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { in find_acceptable_alias()
57 spin_unlock(&inode->i_lock); in find_acceptable_alias()
64 spin_lock(&inode->i_lock); in find_acceptable_alias()
67 spin_unlock(&inode->i_lock); in find_acceptable_alias()
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/openbmc/linux/drivers/gpu/drm/
H A Ddrm_of.c1 // SPDX-License-Identifier: GPL-2.0-only
5 #include <linux/media-bus-format.h>
25 * drm_of_crtc_port_mask - find the mask of a registered CRTC by port OF node
39 if (tmp->port == port) in drm_of_crtc_port_mask()
50 * drm_of_find_possible_crtcs - find the possible CRTCs for an encoder port
83 * drm_of_component_match_add - Add a component helper OF node match rule
101 * drm_of_component_probe - Generic probe function for a component based master
121 if (!dev->of_node) in drm_of_component_probe()
122 return -EINVAL; in drm_of_component_probe()
129 port = of_parse_phandle(dev->of_node, "ports", i); in drm_of_component_probe()
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/openbmc/qemu/include/hw/misc/
H A Dled.h4 * Copyright (C) 2020 Philippe Mathieu-Daudé <f4bug@amsat.org>
6 * SPDX-License-Identifier: GPL-2.0-or-later
12 #include "hw/qdev-core.h"
23 * https://www.lumileds.com/products/color-leds/luxeon-rebel-color/
48 * Determines whether a GPIO is using a positive (active-high)
77 * This utility is meant for LED connected to GPIO.
/openbmc/linux/Documentation/devicetree/bindings/net/
H A Dibm,emac.txt8 correct clock-frequency property.
13 - device_type : "network"
15 - compatible : compatible list, contains 2 entries, first is
16 "ibm,emac-CHIP" where CHIP is the host ASIC (440gx,
18 "ibm,emac4". For Axon, thus, we have: "ibm,emac-axon",
20 - interrupts : <interrupt mapping for EMAC IRQ and WOL IRQ>
21 - reg : <registers mapping>
22 - local-mac-address : 6 bytes, MAC address
23 - mal-device : phandle of the associated McMAL node
24 - mal-tx-channel : 1 cell, index of the tx channel on McMAL associated
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/openbmc/qemu/docs/specs/
H A Divshmem-spec.rst2 Device Specification for Inter-VM shared memory device
5 The Inter-VM shared memory device (ivshmem) is designed to share a
27 --------
31 - BAR0 holds device registers (256 Byte MMIO)
32 - BAR1 holds MSI-X table and PBA (only ivshmem-doorbell)
33 - BAR2 maps the shared memory object
37 - If you only need the shared memory part, BAR2 suffices. This way,
41 - If you additionally need the capability for peers to interrupt each
50 IVPosition register (described below) to become non-negative before
57 --------------------
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/openbmc/linux/Documentation/devicetree/bindings/iio/proximity/
H A Dsemtech,sx9310.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Daniel Campello <campello@chromium.org>
16 https://www.semtech.com/products/smart-sensing/sar-sensors/sx9310
19 - $ref: /schemas/iio/iio.yaml#
24 - semtech,sx9310
25 - semtech,sx9311
37 vdd-supply:
40 svdd-supply:
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/openbmc/linux/Documentation/misc-devices/
H A Dspear-pcie-gadget.rst1 .. SPDX-License-Identifier: GPL-2.0
37 -----------------------
42 no_of_msi zero if MSI is not enabled by host. A positive value is the
53 ------------------------
61 inta write 1 to assert INTA and 0 to de-assert.
78 Program all PCIe registers in such a way that when this device is connected
83 #mount -t configfs none /Config
109 as BAR0 address then when this device will be connected to a host, it will be
138 To de-assert INTA::
170 # cd -
/openbmc/linux/Documentation/devicetree/bindings/mailbox/
H A Dti,omap-mailbox.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mailbox/ti,omap-mailbox.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Suman Anna <s-anna@ti.com>
15 external to the various processor subsystems and is connected on an
35 lines can also be routed to different processor sub-systems on DRA7xx as they
43 smaller, and the interrupt output lines are connected directly to various
49 within a SoC. The sub-mailboxes (actual communication channels) are
56 "mbox-names" (please see Documentation/devicetree/bindings/mailbox/mailbox.txt
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/openbmc/linux/Documentation/input/devices/
H A Datarikbd.rst12 provides a convenient connection point for a mouse and switch-type joysticks.
13 The ikbd processor also maintains a time-of-day clock with one second
18 The ikbd communicates with the main processor over a high speed bi-directional
41 0xF8-0xFB relative mouse position records (lsbs determined by
43 0xFC time-of-day
67 ---------------------------
92 +127...-128 range, the motion is broken into multiple packets.
97 ---------------------------
104 ---------------------
120 ------------------------
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H A Diforce-protocol.rst7 Home page at `<http://web.archive.org/web/*/http://www.esil.univ-mrs.fr>`_
16 specify force effects to I-Force 2.0 devices. None of this information comes
25 send data to your I-Force device based on what you read in this document.
30 All values are hexadecimal with big-endian encoding (msb on the left). Beware,
31 values inside packets are encoded using little-endian. Bytes whose roles are
35 ------------------------
64 00 X-Axis lsb
65 01 X-Axis msb
66 02 Y-Axis lsb, or gas pedal for a wheel
67 03 Y-Axis msb, or brake pedal for a wheel
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/openbmc/u-boot/lib/
H A DKconfig7 This is used by SoC platforms which do not have built-in ELM
13 Enabling this option will pass "-O2" to gcc when compiling
86 This option allows you to use the built-in libgcc implementation
87 of U-Boot instead of the one provided by the compiler.
122 If this variable is defined, U-Boot is linked against the
128 prompt "Pseudo-random library support type"
132 Select the library to provide pseudo-random number generator
137 bool "Pseudo-random library support"
147 The faster memset() is the arch-specific one (if available) enabled
150 size-constrained environments even this may be too big. Enable this
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/openbmc/openpower-hw-diags/analyzer/ras-data/
H A Dras-data-definition.md15 The value of this keyword is a `string` representing a 32-bit hexidecimal number
16 in the format `[0-9A-Fa-f]{8}`. This value is used to determine the chip model
23 keyword is a positive integer. Version `1` has been deprecated. The current
44 connected to this chip. Each element of this object will have the format:
55 This describes how the bus is connected to this chip. Note that the `unit`
58 find the connected `parent` chip/unit.
61 | ------- | ----------------------------------------------------------------- |
88 | -------- | ------------------------------------------------------------------ |
102 | ----- | --------------------------------- |
112 | ------- | ------------------------------------------------------ |
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/openbmc/linux/Documentation/driver-api/nfc/
H A Dnfc-hci.rst5 - Author: Eric Lapuyade, Samuel Ortiz
6 - Contact: eric.lapuyade@intel.com, samuel.ortiz@intel.com
9 -------
12 enables easy writing of HCI-based NFC drivers. The HCI layer runs as an NFC Core
17 ---
30 - one for executing commands : nfc_hci_msg_tx_work(). Only one command
32 - one for dispatching received events and commands : nfc_hci_msg_rx_work().
35 --------------------------
40 those gates have pipes connected when the hci device is set up.
41 In case the chip supports pre-opened gates and pseudo-static pipes, the driver
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