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linux/Documentation/ABI/testing/sysfs-class-power
Adam Thomson cf45004195 power: supply: Add 'usb_type' property and supporting code 
This commit adds the 'usb_type' property to represent USB supplies
which can report a number of different types based on a connection
event.

Examples of this already exist in drivers whereby the existing 'type'
property is updated, based on an event, to represent what was
connected (e.g. USB, USB_DCP, USB_ACA, ...). Current implementations
however don't show all supported connectable types, so this knowledge
has to be exlicitly known for each driver that supports this.

The 'usb_type' property is intended to fill this void and show users
all possible USB types supported by a driver. The property, when read,
shows all available types for the driver, and the one currently chosen
is highlighted/bracketed. It is expected that the 'type' property
would then just show the top-level type 'USB', and this would be
static.

Currently the 'usb_type' enum contains all of the USB variant types
that exist for the 'type' enum at this time, and in addition has
SDP and PPS types. The mirroring is intentional so as to not impact
existing usage of the 'type' property.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-25 14:17:48 +02:00

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===== General Properties =====
What: /sys/class/power_supply/<supply_name>/manufacturer
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the name of the device manufacturer.
Access: Read
Valid values: Represented as string
What: /sys/class/power_supply/<supply_name>/model_name
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the name of the device model.
Access: Read
Valid values: Represented as string
What: /sys/class/power_supply/<supply_name>/serial_number
Date: January 2008
Contact: linux-pm@vger.kernel.org
Description:
Reports the serial number of the device.
Access: Read
Valid values: Represented as string
What: /sys/class/power_supply/<supply_name>/type
Date: May 2010
Contact: linux-pm@vger.kernel.org
Description:
Describes the main type of the supply.
Access: Read
Valid values: "Battery", "UPS", "Mains", "USB"
===== Battery Properties =====
What: /sys/class/power_supply/<supply_name>/capacity
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Fine grain representation of battery capacity.
Access: Read
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_alert_max
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Maximum battery capacity trip-wire value where the supply will
notify user-space of the event. This is normally used for the
battery discharging scenario where user-space needs to know the
battery has dropped to an upper level so it can take
appropriate action (e.g. warning user that battery level is
low).
Access: Read, Write
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_alert_min
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Minimum battery capacity trip-wire value where the supply will
notify user-space of the event. This is normally used for the
battery discharging scenario where user-space needs to know the
battery has dropped to a lower level so it can take
appropriate action (e.g. warning user that battery level is
critically low).
Access: Read, Write
Valid values: 0 - 100 (percent)
What: /sys/class/power_supply/<supply_name>/capacity_level
Date: June 2009
Contact: linux-pm@vger.kernel.org
Description:
Coarse representation of battery capacity.
Access: Read
Valid values: "Unknown", "Critical", "Low", "Normal", "High",
"Full"
What: /sys/class/power_supply/<supply_name>/current_avg
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports an average IBAT current reading for the battery, over a
fixed period. Normally devices will provide a fixed interval in
which they average readings to smooth out the reported value.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/current_max
Date: October 2010
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum IBAT current allowed into the battery.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/current_now
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports an instant, single IBAT current reading for the battery.
This value is not averaged/smoothed.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/charge_type
Date: July 2009
Contact: linux-pm@vger.kernel.org
Description:
Represents the type of charging currently being applied to the
battery.
Access: Read
Valid values: "Unknown", "N/A", "Trickle", "Fast"
What: /sys/class/power_supply/<supply_name>/charge_term_current
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Reports the charging current value which is used to determine
when the battery is considered full and charging should end.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/health
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the health of the battery or battery side of charger
functionality.
Access: Read
Valid values: "Unknown", "Good", "Overheat", "Dead",
"Over voltage", "Unspecified failure", "Cold",
"Watchdog timer expire", "Safety timer expire"
What: /sys/class/power_supply/<supply_name>/precharge_current
Date: June 2017
Contact: linux-pm@vger.kernel.org
Description:
Reports the charging current applied during pre-charging phase
for a battery charge cycle.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/present
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports whether a battery is present or not in the system.
Access: Read
Valid values:
0: Absent
1: Present
What: /sys/class/power_supply/<supply_name>/status
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Represents the charging status of the battery. Normally this
is read-only reporting although for some supplies this can be
used to enable/disable charging to the battery.
Access: Read, Write
Valid values: "Unknown", "Charging", "Discharging",
"Not charging", "Full"
What: /sys/class/power_supply/<supply_name>/technology
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Describes the battery technology supported by the supply.
Access: Read
Valid values: "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
"NiCd", "LiMn"
What: /sys/class/power_supply/<supply_name>/temp
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the current TBAT battery temperature reading.
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_alert_max
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Maximum TBAT temperature trip-wire value where the supply will
notify user-space of the event. This is normally used for the
battery charging scenario where user-space needs to know the
battery temperature has crossed an upper threshold so it can
take appropriate action (e.g. warning user that battery level is
critically high, and charging has stopped).
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_alert_min
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Minimum TBAT temperature trip-wire value where the supply will
notify user-space of the event. This is normally used for the
battery charging scenario where user-space needs to know the
battery temperature has crossed a lower threshold so it can take
appropriate action (e.g. warning user that battery level is
high, and charging current has been reduced accordingly to
remedy the situation).
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_max
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum allowed TBAT battery temperature for
charging.
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_min
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Reports the minimum allowed TBAT battery temperature for
charging.
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/voltage_avg,
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports an average VBAT voltage reading for the battery, over a
fixed period. Normally devices will provide a fixed interval in
which they average readings to smooth out the reported value.
Access: Read
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/voltage_max,
Date: January 2008
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum safe VBAT voltage permitted for the battery,
during charging.
Access: Read
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/voltage_min,
Date: January 2008
Contact: linux-pm@vger.kernel.org
Description:
Reports the minimum safe VBAT voltage permitted for the battery,
during discharging.
Access: Read
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/voltage_now,
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports an instant, single VBAT voltage reading for the battery.
This value is not averaged/smoothed.
Access: Read
Valid values: Represented in microvolts
===== USB Properties =====
What: /sys/class/power_supply/<supply_name>/current_avg
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports an average IBUS current reading over a fixed period.
Normally devices will provide a fixed interval in which they
average readings to smooth out the reported value.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/current_max
Date: October 2010
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum IBUS current the supply can support.
Access: Read
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/current_now
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the IBUS current supplied now. This value is generally
read-only reporting, unless the 'online' state of the supply
is set to be programmable, in which case this value can be set
within the reported min/max range.
Access: Read, Write
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/input_current_limit
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Details the incoming IBUS current limit currently set in the
supply. Normally this is configured based on the type of
connection made (e.g. A configured SDP should output a maximum
of 500mA so the input current limit is set to the same value).
Access: Read, Write
Valid values: Represented in microamps
What: /sys/class/power_supply/<supply_name>/online,
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Indicates if VBUS is present for the supply. When the supply is
online, and the supply allows it, then it's possible to switch
between online states (e.g. Fixed -> Programmable for a PD_PPS
USB supply so voltage and current can be controlled).
Access: Read, Write
Valid values:
0: Offline
1: Online Fixed - Fixed Voltage Supply
2: Online Programmable - Programmable Voltage Supply
What: /sys/class/power_supply/<supply_name>/temp
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the current supply temperature reading. This would
normally be the internal temperature of the device itself (e.g
TJUNC temperature of an IC)
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_alert_max
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Maximum supply temperature trip-wire value where the supply will
notify user-space of the event. This is normally used for the
charging scenario where user-space needs to know the supply
temperature has crossed an upper threshold so it can take
appropriate action (e.g. warning user that the supply
temperature is critically high, and charging has stopped to
remedy the situation).
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_alert_min
Date: July 2012
Contact: linux-pm@vger.kernel.org
Description:
Minimum supply temperature trip-wire value where the supply will
notify user-space of the event. This is normally used for the
charging scenario where user-space needs to know the supply
temperature has crossed a lower threshold so it can take
appropriate action (e.g. warning user that the supply
temperature is high, and charging current has been reduced
accordingly to remedy the situation).
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_max
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum allowed supply temperature for operation.
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/temp_min
Date: July 2014
Contact: linux-pm@vger.kernel.org
Description:
Reports the mainimum allowed supply temperature for operation.
Access: Read
Valid values: Represented in 1/10 Degrees Celsius
What: /sys/class/power_supply/<supply_name>/usb_type
Date: March 2018
Contact: linux-pm@vger.kernel.org
Description:
Reports what type of USB connection is currently active for
the supply, for example it can show if USB-PD capable source
is attached.
Access: Read-Only
Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
"PD_DRP", "PD_PPS", "BrickID"
What: /sys/class/power_supply/<supply_name>/voltage_max
Date: January 2008
Contact: linux-pm@vger.kernel.org
Description:
Reports the maximum VBUS voltage the supply can support.
Access: Read
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/voltage_min
Date: January 2008
Contact: linux-pm@vger.kernel.org
Description:
Reports the minimum VBUS voltage the supply can support.
Access: Read
Valid values: Represented in microvolts
What: /sys/class/power_supply/<supply_name>/voltage_now
Date: May 2007
Contact: linux-pm@vger.kernel.org
Description:
Reports the VBUS voltage supplied now. This value is generally
read-only reporting, unless the 'online' state of the supply
is set to be programmable, in which case this value can be set
within the reported min/max range.
Access: Read, Write
Valid values: Represented in microvolts
===== Device Specific Properties =====
What: /sys/class/power/ds2760-battery.*/charge_now
Date: May 2010
KernelVersion: 2.6.35
Contact: Daniel Mack <daniel@caiaq.de>
Description:
This file is writeable and can be used to set the current
coloumb counter value inside the battery monitor chip. This
is needed for unavoidable corrections of aging batteries.
A userspace daemon can monitor the battery charging logic
and once the counter drops out of considerable bounds, take
appropriate action.
What: /sys/class/power/ds2760-battery.*/charge_full
Date: May 2010
KernelVersion: 2.6.35
Contact: Daniel Mack <daniel@caiaq.de>
Description:
This file is writeable and can be used to set the assumed
battery 'full level'. As batteries age, this value has to be
amended over time.
What: /sys/class/power_supply/max14577-charger/device/fast_charge_timer
Date: October 2014
KernelVersion: 3.18.0
Contact: Krzysztof Kozlowski <krzk@kernel.org>
Description:
This entry shows and sets the maximum time the max14577
charger operates in fast-charge mode. When the timer expires
the device will terminate fast-charge mode (charging current
will drop to 0 A) and will trigger interrupt.
Valid values:
- 5, 6 or 7 (hours),
- 0: disabled.
What: /sys/class/power_supply/max77693-charger/device/fast_charge_timer
Date: January 2015
KernelVersion: 3.19.0
Contact: Krzysztof Kozlowski <krzk@kernel.org>
Description:
This entry shows and sets the maximum time the max77693
charger operates in fast-charge mode. When the timer expires
the device will terminate fast-charge mode (charging current
will drop to 0 A) and will trigger interrupt.
Valid values:
- 4 - 16 (hours), step by 2 (rounded down)
- 0: disabled.
What: /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
Date: January 2015
KernelVersion: 3.19.0
Contact: Krzysztof Kozlowski <krzk@kernel.org>
Description:
This entry shows and sets the charging current threshold for
entering top-off charging mode. When charging current in fast
charge mode drops below this value, the charger will trigger
interrupt and start top-off charging mode.
Valid values:
- 100000 - 200000 (microamps), step by 25000 (rounded down)
- 200000 - 350000 (microamps), step by 50000 (rounded down)
- 0: disabled.
What: /sys/class/power_supply/max77693-charger/device/top_off_timer
Date: January 2015
KernelVersion: 3.19.0
Contact: Krzysztof Kozlowski <krzk@kernel.org>
Description:
This entry shows and sets the maximum time the max77693
charger operates in top-off charge mode. When the timer expires
the device will terminate top-off charge mode (charging current
will drop to 0 A) and will trigger interrupt.
Valid values:
- 0 - 70 (minutes), step by 10 (rounded down)
What: /sys/class/power_supply/bq24257-charger/ovp_voltage
Date: October 2015
KernelVersion: 4.4.0
Contact: Andreas Dannenberg <dannenberg@ti.com>
Description:
This entry configures the overvoltage protection feature of bq24257-
type charger devices. This feature protects the device and other
components against damage from overvoltage on the input supply. See
device datasheet for details.
Valid values:
- 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
10500000 (all uV)
What: /sys/class/power_supply/bq24257-charger/in_dpm_voltage
Date: October 2015
KernelVersion: 4.4.0
Contact: Andreas Dannenberg <dannenberg@ti.com>
Description:
This entry configures the input dynamic power path management voltage of
bq24257-type charger devices. Once the supply drops to the configured
voltage, the input current limit is reduced down to prevent the further
drop of the supply. When the IC enters this mode, the charge current is
lower than the set value. See device datasheet for details.
Valid values:
- 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
4760000 (all uV)
What: /sys/class/power_supply/bq24257-charger/high_impedance_enable
Date: October 2015
KernelVersion: 4.4.0
Contact: Andreas Dannenberg <dannenberg@ti.com>
Description:
This entry allows enabling the high-impedance mode of bq24257-type
charger devices. If enabled, it places the charger IC into low power
standby mode with the switch mode controller disabled. When disabled,
the charger operates normally. See device datasheet for details.
Valid values:
- 1: enabled
- 0: disabled
What: /sys/class/power_supply/bq24257-charger/sysoff_enable
Date: October 2015
KernelVersion: 4.4.0
Contact: Andreas Dannenberg <dannenberg@ti.com>
Description:
This entry allows enabling the sysoff mode of bq24257-type charger
devices. If enabled and the input is removed, the internal battery FET
is turned off in order to reduce the leakage from the BAT pin to less
than 1uA. Note that on some devices/systems this disconnects the battery
from the system. See device datasheet for details.
Valid values:
- 1: enabled
- 0: disabled
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