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+What: /sys/class/chromeos/<ec-device-name>/lightbar/brightness
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ Writing to this file adjusts the overall brightness of
+ the lightbar, separate from any color intensity. The
+ valid range is 0 (off) to 255 (maximum brightness).
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/interval_msec
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ The lightbar is controlled by an embedded controller (EC),
+ which also manages the keyboard, battery charging, fans,
+ and other system hardware. To prevent unprivileged users
+ from interfering with the other EC functions, the rate at
+ which the lightbar control files can be read or written is
+ limited.
+
+ Reading this file will return the number of milliseconds
+ that must elapse between accessing any of the lightbar
+ functions through this interface. Going faster will simply
+ block until the necessary interval has lapsed. The interval
+ applies uniformly to all accesses of any kind by any user.
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/led_rgb
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ This allows you to control each LED segment. If the
+ lightbar is already running one of the automatic
+ sequences, you probably won’t see anything change because
+ your color setting will be almost immediately replaced.
+ To get useful results, you should stop the lightbar
+ sequence first.
+
+ The values written to this file are sets of four integers,
+ indicating LED, RED, GREEN, BLUE. The LED number is 0 to 3
+ to select a single segment, or 4 to set all four segments
+ to the same value at once. The RED, GREEN, and BLUE
+ numbers should be in the range 0 (off) to 255 (maximum).
+ You can update more than one segment at a time by writing
+ more than one set of four integers.
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/program
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ This allows you to upload and run custom lightbar sequences.
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/sequence
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ The Pixel lightbar has a number of built-in sequences
+ that it displays under various conditions, such as at
+ power on, shut down, or while running. Reading from this
+ file displays the current sequence that the lightbar is
+ displaying. Writing to this file allows you to change the
+ sequence.
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/userspace_control
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ This allows you to take the control of the lightbar. This
+ prevents the kernel from going through its normal
+ sequences.
+
+What: /sys/class/chromeos/<ec-device-name>/lightbar/version
+Date: August 2015
+KernelVersion: 4.2
+Description:
+ Show the information about the lightbar version.