What: /sys/class/usb_power_delivery
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Directory for USB Power Delivery devices.
What: /sys/class/usb_power_delivery/.../revision
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
File showing the USB Power Delivery Specification Revision used
in communication.
What: /sys/class/usb_power_delivery/.../version
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This is an optional attribute file showing the version of the
specific revision of the USB Power Delivery Specification. In
most cases the specification version is not known and the file
is not available.
What: /sys/class/usb_power_delivery/.../source-capabilities
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The source capabilities message "Source_Capabilities" contains a
set of Power Data Objects (PDO), each representing a type of
power supply. The order of the PDO objects is defined in the USB
Power Delivery Specification. Each PDO - power supply - will
have its own device, and the PDO device name will start with the
object position number as the first character followed by the
power supply type name (":" as delimiter).
/sys/class/usb_power_delivery/.../source_capabilities/<position>:<type>
What: /sys/class/usb_power_delivery/.../sink-capabilities
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The sink capability message "Sink_Capabilities" contains a set
of Power Data Objects (PDO) just like with source capabilities,
but instead of describing the power capabilities, these objects
describe the power requirements.
The order of the objects in the sink capability message is the
same as with the source capabilities message.
Fixed Supplies
What: /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Devices containing the attributes (the bit fields) defined for
Fixed Supplies.
The device "1:fixed_supply" is special. USB Power Delivery
Specification dictates that the first PDO (at object position
1), and the only mandatory PDO, is always the vSafe5V Fixed
Supply Object. vSafe5V Object has additional fields defined for
it that the other Fixed Supply Objects do not have and that are
related to the USB capabilities rather than power capabilities.
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_power
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file contains boolean value that tells does the device
support both source and sink power roles.
What: /sys/class/usb_power_delivery/.../source-capabilities/1:fixed_supply/usb_suspend_supported
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the USB Suspend Supported bit in
vSafe5V Fixed Supply Object. If the bit is set then the device
will follow the USB 2.0 and USB 3.2 rules for suspend and
resume.
What: /sys/class/usb_power_delivery/.../sink-capabilities/1:fixed_supply/higher_capability
Date: February 2023
Contact: Saranya Gopal <[email protected]>
Description:
This file shows the value of the Higher capability bit in
vsafe5V Fixed Supply Object. If the bit is set, then the sink
needs more than vsafe5V(eg. 12 V) to provide full functionality.
Valid values: 0, 1
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unconstrained_power
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the Unconstrained Power bit in
vSafe5V Fixed Supply Object. The bit is set when an external
source of power, powerful enough to power the entire system on
its own, is available for the device.
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/usb_communication_capable
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the USB Communication Capable bit in
vSafe5V Fixed Supply Object.
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/dual_role_data
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the Dual-Role Data bit in vSafe5V
Fixed Supply Object. Dual role data means ability act as both
USB host and USB device.
What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unchunked_extended_messages_supported
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the Unchunked Extended Messages
Supported bit in vSafe5V Fixed Supply Object.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:fixed_supply/voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The voltage the supply supports in millivolts.
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/peak_current
Date: October 2023
Contact: Heikki Krogerus <[email protected]>
Description:
This file shows the value of the Fixed Power Source Peak Current
Capability field.
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:fixed_supply/maximum_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum current of the fixed source supply in milliamperes.
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/operational_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Operational current of the sink in milliamperes.
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:fixed_supply/fast_role_swap_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
This file contains the value of the "Fast Role Swap USB Type-C
Current" field that tells the current level the sink requires
after a Fast Role Swap.
0 - Fast Swap not supported"
1 - Default USB Power"
2 - 1.5A@5V"
3 - 3.0A@5V"
Variable Supplies
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Variable Power Supply PDO.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/maximum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:variable_supply/minimum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Minimum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:variable_supply/maximum_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The maximum current in milliamperes that the source can supply
at the given Voltage range.
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:variable_supply/operational_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The operational current in milliamperes that the sink requires
at the given Voltage range.
Battery Supplies
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Battery PDO.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery/maximum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:battery/minimum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Minimum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:battery/maximum_power
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum allowable Power in milliwatts.
What: /sys/class/usb_power_delivery/.../sink-capabilities/<position>:battery/operational_power
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The operational power that the sink requires at the given
voltage range.
Standard Power Range (SPR) Programmable Power Supplies
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Programmable Power Supply (PPS) Augmented PDO (APDO).
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/minimum_voltage
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Minimum Voltage in millivolts.
What: /sys/class/usb_power_delivery/.../<capability>/<position>:programmable_supply/maximum_current
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
Maximum Current in milliamperes.
What: /sys/class/usb_power_delivery/.../source-capabilities/<position>:programmable_supply/pps_power_limited
Date: May 2022
Contact: Heikki Krogerus <[email protected]>
Description:
The PPS Power Limited bit indicates whether or not the source
supply will exceed the rated output power if requested.
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