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Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-power-twl4030')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-power-twl4030 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-power-twl4030 b/Documentation/ABI/testing/sysfs-class-power-twl4030 new file mode 100644 index 000000000000..be26af0f1895 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-power-twl4030 @@ -0,0 +1,45 @@ +What: /sys/class/power_supply/twl4030_ac/max_current + /sys/class/power_supply/twl4030_usb/max_current +Description: + Read/Write limit on current which may + be drawn from the ac (Accessory Charger) or + USB port. + + Value is in micro-Amps. + + Value is set automatically to an appropriate + value when a cable is plugged or unplugged. + + Value can the set by writing to the attribute. + The change will only persist until the next + plug event. These event are reported via udev. + + +What: /sys/class/power_supply/twl4030_usb/mode +Description: + Changing mode for USB port. + Writing to this can disable charging. + + Possible values are: + "auto" - draw power as appropriate for detected + power source and battery status. + "off" - do not draw any power. + "continuous" + - activate mode described as "linear" in + TWL data sheets. This uses whatever + current is available and doesn't switch off + when voltage drops. + + This is useful for unstable power sources + such as bicycle dynamo, but care should + be taken that battery is not over-charged. + +What: /sys/class/power_supply/twl4030_ac/mode +Description: + Changing mode for 'ac' port. + Writing to this can disable charging. + + Possible values are: + "auto" - draw power as appropriate for detected + power source and battery status. + "off" - do not draw any power. |