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/Documentation/devicetree/bindings/regulator/
Dregulator.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Voltage/Current Regulators
10 - Liam Girdwood <lgirdwood@gmail.com>
11 - Mark Brown <broonie@kernel.org>
14 regulator-name:
18 regulator-min-microvolt:
21 regulator-max-microvolt:
24 regulator-microvolt-offset:
[all …]
/Documentation/devicetree/bindings/usb/
Dchipidea,usb2-imx.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/usb/chipidea,usb2-imx.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Xu Yang <xu.yang_2@nxp.com>
15 - enum:
16 - fsl,imx27-usb
17 - items:
18 - enum:
19 - fsl,imx23-usb
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Dusb251xb.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Microchip USB 2.0 Hi-Speed Hub Controller
10 - Richard Leitner <richard.leitner@skidata.com>
15 - microchip,usb2422
16 - microchip,usb2512b
17 - microchip,usb2512bi
18 - microchip,usb2513b
19 - microchip,usb2513bi
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Dpxa-usb.txt6 - compatible: Should be "marvell,pxa-ohci" for USB controllers
10 - "marvell,enable-port1", "marvell,enable-port2", "marvell,enable-port3"
12 - "marvell,port-mode" selects the mode of the ports:
16 - "marvell,power-sense-low" - power sense pin is low-active.
17 - "marvell,power-control-low" - power control pin is low-active.
18 - "marvell,no-oc-protection" - disable over-current protection.
19 - "marvell,oc-mode-perport" - enable per-port over-current protection.
20 - "marvell,power_on_delay" Power On to Power Good time - in ms.
25 compatible = "marvell,pxa-ohci";
28 marvell,enable-port1;
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Ddwc2.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
13 - $ref: usb-drd.yaml#
14 - $ref: usb-hcd.yaml#
19 - const: brcm,bcm2835-usb
20 - const: hisilicon,hi6220-usb
21 - const: ingenic,jz4775-otg
22 - const: ingenic,jz4780-otg
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Dfsl,imx8mp-dwc3.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/usb/fsl,imx8mp-dwc3.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Li Jun <jun.li@nxp.com>
15 const: fsl,imx8mp-dwc3
19 - description: Address and length of the register set for HSIO Block Control
20 - description: Address and length of the register set for the wrapper of dwc3 core on the SOC.
22 "#address-cells":
25 "#size-cells":
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/Documentation/hwmon/
Dltc4282.rst1 .. SPDX-License-Identifier: GPL-2.0-only
12 Addresses scanned: - I2C 0x40 - 0x5A (7-bit)
13 Addresses scanned: - I2C 0x80 - 0xB4 with a step of 2 (8-bit)
17 https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4282.pdf
25 from a live backplane. Using one or more external N-channel pass transistors,
26 board supply voltage and inrush current are ramped up at an adjustable rate. An
27 I2C interface and onboard ADC allows for monitoring of board current, voltage,
28 power, energy and fault status. The device features analog foldback current
31 parallel MOSFETs or support a 2-stage start-up that first charges the load
32 capacitance followed by enabling a low on-resistance path to the load. The
[all …]
/Documentation/devicetree/bindings/hwmon/
Dadi,ltc4282.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 LTC4282 I2C High Current Hot Swap Controller over I2C
10 - Nuno Sa <nuno.sa@analog.com>
13 Analog Devices LTC4282 I2C High Current Hot Swap Controller over I2C.
15 https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4282.pdf
20 - adi,ltc4282
25 vdd-supply: true
30 '#clock-cells':
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/Documentation/ABI/testing/
Dsysfs-class-power-twl40304 Writing to this can disable charging.
14 current is available and doesn't switch off
19 be taken that battery is not over-charged.
25 Writing to this can disable charging.
Dsysfs-bus-iio-adc-mcp35643 Contact: linux-iio@vger.kernel.org
5 This attribute is used to set the gain of the biasing current
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
35 Write '1' to enable it, write '0' to disable it.
[all …]
Dsysfs-class-power-ltc4162l1 What: /sys/class/power_supply/ltc4162-l/charge_status
18 What: /sys/class/power_supply/ltc4162-l/ibat
22 Battery input current as measured by the charger. Negative value
29 What: /sys/class/power_supply/ltc4162-l/vbat
39 What: /sys/class/power_supply/ltc4162-l/vbat_avg
43 Battery voltage, averaged over time, as measured by the charger.
49 What: /sys/class/power_supply/ltc4162-l/force_telemetry
53 To save battery current, the measurement system is disabled if
55 voltage, current and temperature measurements.
65 What: /sys/class/power_supply/ltc4162-l/arm_ship_mode
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Dsysfs-bus-usb10 This allows to avoid side-effects with drivers
28 drivers, non-authorized one are not. By default, wired
33 Contact: linux-usb@vger.kernel.org
67 What: /sys/bus/usb-serial/drivers/.../new_id
69 Contact: linux-usb@vger.kernel.org
72 extra bus folder "usb-serial" in sysfs; apart from that
97 If CONFIG_PM is set and a USB 2.0 lpm-capable device is plugged
103 or disable) indicating whether or not USB2 hardware LPM is
105 the file to enable/disable the feature.
113 If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged
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Dsysfs-class-power5 Contact: linux-pm@vger.kernel.org
14 Contact: linux-pm@vger.kernel.org
23 Contact: linux-pm@vger.kernel.org
32 Contact: linux-pm@vger.kernel.org
43 Contact: linux-pm@vger.kernel.org
47 Reports an average IBAT current reading for the battery, over
54 Reports an average IBUS current reading over a fixed period.
62 batteries and for USB IBUS current.
66 Contact: linux-pm@vger.kernel.org
70 Reports the maximum IBAT current allowed into the battery.
[all …]
/Documentation/power/regulator/
Doverview.rst2 Linux voltage and current regulator framework
9 voltage and current regulators.
13 regulators (where voltage output is controllable) and current sinks (where
14 current limit is controllable).
26 - Regulator
27 - Electronic device that supplies power to other devices.
28 Most regulators can enable and disable their output while
29 some can control their output voltage and or current.
31 Input Voltage -> Regulator -> Output Voltage
34 - PMIC
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Dconsumer.rst35 2. Regulator Output Enable & Disable (static & dynamic drivers)
55 A consumer can disable its supply when no longer needed by calling::
60 This may not disable the supply if it's shared with other consumers. The
103 4. Regulator Current Limit Control & Status (dynamic drivers)
107 current limit to match system operating points. e.g. LCD backlight driver can
108 change the current limit to vary the backlight brightness, USB drivers may want
111 Consumers can control their supply current limit by calling::
115 Where min_uA and max_uA are the minimum and maximum acceptable current limit in
120 when enabled, then the current limit changes instantly, otherwise the current
121 limit configuration changes and the current limit is physically set when the
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/Documentation/devicetree/bindings/mfd/
Dst,stpmic1.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
12 - pascal Paillet <p.paillet@foss.st.com>
24 "#interrupt-cells":
27 interrupt-controller: true
36 const: st,stpmic1-onkey
40 - description: onkey-falling, happens when onkey is pressed. IT_PONKEY_F of pmic
41 - description: onkey-rising, happens when onkey is released. IT_PONKEY_R of pmic
43 interrupt-names:
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/Documentation/devicetree/bindings/leds/backlight/
Drichtek,rt4831-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - ChiYuan Huang <cy_huang@richtek.com>
17 Each channel driving current is up to 30mA
20 https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
23 - $ref: common.yaml#
27 const: richtek,rt4831-backlight
29 default-brightness:
[all …]
/Documentation/arch/powerpc/
Ddexcr.rst1 .. SPDX-License-Identifier: GPL-2.0-or-later
11 PowerPC ISA 3.1B (Power10) that allows per-cpu control over several dynamic
13 branch target prediction) and enabling return-oriented programming (ROP)
18 to enable/disable the aspect. There are several variants of the DEXCR for
24 A hypervisor-privileged SPR that can control aspects for the hypervisor and
27 An optional ultravisor-privileged SPR that can control aspects for the ultravisor.
29 Userspace can examine the current DEXCR state using a dedicated SPR that
30 provides a non-privileged read-only view of the userspace DEXCR aspects.
31 There is also an SPR that provides a read-only view of the hypervisor enforced
40 -----
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/Documentation/devicetree/bindings/power/supply/
Dactive-semi,act8945a-charger.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/supply/active-semi,act8945a-charger.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Active-semi ACT8945A Charger Function
10 - Sebastian Reichel <sre@kernel.org>
13 - $ref: power-supply.yaml#
17 const: active-semi,act8945a-charger
22 active-semi,chglev-gpios:
24 description: charge current level GPIO
[all …]
/Documentation/devicetree/bindings/leds/
Dleds-lm3532.txt1 * Texas Instruments - lm3532 White LED driver with ambient light sensing
4 The LM3532 provides the 3 high-voltage, low-side current sinks. The device is
5 programmable over an I2C-compatible interface and has independent
6 current control for all three channels. The adaptive current regulation
7 method allows for different LED currents in each current sink thus allowing
11 each with 32 internal voltage setting resistors, 8-bit logarithmic and linear
16 - compatible : "ti,lm3532"
17 - reg : I2C slave address
18 - #address-cells : 1
19 - #size-cells : 0
[all …]
/Documentation/devicetree/bindings/sound/
Dcs35l35.txt5 - compatible : "cirrus,cs35l35"
7 - reg : the I2C address of the device for I2C
9 - VA-supply, VP-supply : power supplies for the device,
13 - interrupts : IRQ line info CS35L35.
14 (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
17 - cirrus,boost-ind-nanohenry: Inductor value for boost converter. The value is
21 - reset-gpios : gpio used to reset the amplifier
23 - cirrus,stereo-config : Boolean to determine if there are 2 AMPs for a
26 - cirrus,audio-channel : Set Location of Audio Signal on Serial Port
30 - cirrus,advisory-channel : Set Location of Advisory Signal on Serial Port
[all …]
/Documentation/networking/device_drivers/ethernet/intel/
Dice.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 2018-2021 Intel Corporation.
13 - Overview
14 - Identifying Your Adapter
15 - Important Notes
16 - Additional Features & Configurations
17 - Performance Optimization
28 This driver supports XDP (Express Data Path) and AF_XDP zero-copy. Note that
43 -------------------------------------------
54 1) Make sure that your system's physical memory is in a high-performance
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/Documentation/networking/
Dip-sysctl.rst1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
25 ip_no_pmtu_disc - INTEGER
26 Disable Path MTU Discovery. If enabled in mode 1 and a
27 fragmentation-required ICMP is received, the PMTU to this
38 accept fragmentation-needed errors if the underlying protocol
39 can verify them besides a plain socket lookup. Current
[all …]
/Documentation/admin-guide/pm/
Dintel_uncore_frequency_scaling.rst1 .. SPDX-License-Identifier: GPL-2.0
8 :Copyright: |copy| 2022-2023 Intel Corporation
13 ------------
21 want to have control over it. The objective is similar to allowing users to set
30 ---------------
45 This is a read-only attribute. If users adjust max_freq_khz,
50 This is a read-only attribute. If users adjust min_freq_khz,
60 This attribute is used to get the current uncore frequency.
63 -----------------------------------------------------------------
72 The current sysfs interface supports controls at package and die level.
[all …]
/Documentation/power/
Dsuspend-and-cpuhotplug.rst5 (C) 2011 - 2014 Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
8 I. Differences between CPU hotplug and Suspend-to-RAM
11 How does the regular CPU hotplug code differ from how the Suspend-to-RAM
14 Well, a picture is worth a thousand words... So ASCII art follows :-)
16 [This depicts the current design in the kernel, and focusses only on the
21 What happens when regular CPU hotplug and Suspend-to-RAM race with each other
24 On a high level, the suspend-resume cycle goes like this::
26 |Freeze| -> |Disable nonboot| -> |Do suspend| -> |Enable nonboot| -> |Thaw |
33 -----------------
58 Iterate over CURRENTLY
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