| Enric Balletbo i Serra | ecf8a6c | 2018-12-12 18:33:57 +0100 | [diff] [blame] | 1 | What: /sys/class/chromeos/<ec-device-name>/lightbar/brightness |
| 2 | Date: August 2015 |
| 3 | KernelVersion: 4.2 |
| 4 | Description: |
| 5 | Writing to this file adjusts the overall brightness of |
| 6 | the lightbar, separate from any color intensity. The |
| 7 | valid range is 0 (off) to 255 (maximum brightness). |
| 8 | |
| 9 | What: /sys/class/chromeos/<ec-device-name>/lightbar/interval_msec |
| 10 | Date: August 2015 |
| 11 | KernelVersion: 4.2 |
| 12 | Description: |
| 13 | The lightbar is controlled by an embedded controller (EC), |
| 14 | which also manages the keyboard, battery charging, fans, |
| 15 | and other system hardware. To prevent unprivileged users |
| 16 | from interfering with the other EC functions, the rate at |
| 17 | which the lightbar control files can be read or written is |
| 18 | limited. |
| 19 | |
| 20 | Reading this file will return the number of milliseconds |
| 21 | that must elapse between accessing any of the lightbar |
| 22 | functions through this interface. Going faster will simply |
| 23 | block until the necessary interval has lapsed. The interval |
| 24 | applies uniformly to all accesses of any kind by any user. |
| 25 | |
| 26 | What: /sys/class/chromeos/<ec-device-name>/lightbar/led_rgb |
| 27 | Date: August 2015 |
| 28 | KernelVersion: 4.2 |
| 29 | Description: |
| 30 | This allows you to control each LED segment. If the |
| 31 | lightbar is already running one of the automatic |
| 32 | sequences, you probably won’t see anything change because |
| 33 | your color setting will be almost immediately replaced. |
| 34 | To get useful results, you should stop the lightbar |
| 35 | sequence first. |
| 36 | |
| 37 | The values written to this file are sets of four integers, |
| 38 | indicating LED, RED, GREEN, BLUE. The LED number is 0 to 3 |
| 39 | to select a single segment, or 4 to set all four segments |
| 40 | to the same value at once. The RED, GREEN, and BLUE |
| 41 | numbers should be in the range 0 (off) to 255 (maximum). |
| 42 | You can update more than one segment at a time by writing |
| 43 | more than one set of four integers. |
| 44 | |
| 45 | What: /sys/class/chromeos/<ec-device-name>/lightbar/program |
| 46 | Date: August 2015 |
| 47 | KernelVersion: 4.2 |
| 48 | Description: |
| 49 | This allows you to upload and run custom lightbar sequences. |
| 50 | |
| 51 | What: /sys/class/chromeos/<ec-device-name>/lightbar/sequence |
| 52 | Date: August 2015 |
| 53 | KernelVersion: 4.2 |
| 54 | Description: |
| 55 | The Pixel lightbar has a number of built-in sequences |
| 56 | that it displays under various conditions, such as at |
| 57 | power on, shut down, or while running. Reading from this |
| 58 | file displays the current sequence that the lightbar is |
| 59 | displaying. Writing to this file allows you to change the |
| 60 | sequence. |
| 61 | |
| 62 | What: /sys/class/chromeos/<ec-device-name>/lightbar/userspace_control |
| 63 | Date: August 2015 |
| 64 | KernelVersion: 4.2 |
| 65 | Description: |
| 66 | This allows you to take the control of the lightbar. This |
| 67 | prevents the kernel from going through its normal |
| 68 | sequences. |
| 69 | |
| 70 | What: /sys/class/chromeos/<ec-device-name>/lightbar/version |
| 71 | Date: August 2015 |
| 72 | KernelVersion: 4.2 |
| 73 | Description: |
| 74 | Show the information about the lightbar version. |