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Documentation: power: bq24257: Document exported sysfs entries

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Document the settings exported by bq24257 charger driver through sysfs
entries:
- ovp_voltage
- in_dpm_voltage
- high_impedance_enable
- sysoff_enable

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
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Andreas Dannenberg 2015-09-28 17:34:02 -05:00 committed by Sebastian Reichel
parent 007ee5f656
commit 6169588f69
1 changed files with 58 additions and 0 deletions
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Documentation/ABI/testing/sysfs-class-power
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@ -74,3 +74,61 @@ Description:
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