| 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. |