What:		/sys/class/leds/<led>/als_channel
Date:		May 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Set the ALS output channel to use as input in
		ALS-current-control mode (1, 2), where:

		1 - out_current1
		2 - out_current2

What:		/sys/class/leds/<led>/als_en
Date:		May 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Enable ALS-current-control mode (0, 1).

What:		/sys/class/leds/<led>/falltime
What:		/sys/class/leds/<led>/risetime
Date:		April 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Set the pattern generator fall and rise times (0..7), where:

		0 - 2048 us
		1 - 262 ms
		2 - 524 ms
		3 - 1.049 s
		4 - 2.097 s
		5 - 4.194 s
		6 - 8.389 s
		7 - 16.78 s

What:		/sys/class/leds/<led>/id
Date:		April 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Get the id of this led (0..3).

What:		/sys/class/leds/<led>/linear
Date:		April 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Set the brightness-mapping mode (0, 1), where:

		0 - exponential mode
		1 - linear mode

What:		/sys/class/leds/<led>/pwm
Date:		April 2012
KernelVersion:	3.5
Contact:	Johan Hovold <jhovold@gmail.com>
Description:
		Set the PWM-input control mask (5 bits), where:

		bit 5 - PWM-input enabled in Zone 4
		bit 4 - PWM-input enabled in Zone 3
		bit 3 - PWM-input enabled in Zone 2
		bit 2 - PWM-input enabled in Zone 1
		bit 1 - PWM-input enabled in Zone 0
		bit 0 - PWM-input enabled