1 .. SPDX-License-Identifier: GPL-2.0 1 .. SPDX-License-Identifier: GPL-2.0
2 2
3 ============================================== 3 ===========================================================
4 Kernel driver for Intel Cherry Trail Whiskey C 4 Kernel driver for Intel Cherry Trail Whiskey Cove PMIC LEDs
5 ============================================== 5 ===========================================================
6 6
7 /sys/class/leds/<led>/hw_pattern 7 /sys/class/leds/<led>/hw_pattern
8 -------------------------------- 8 --------------------------------
9 9
10 Specify a hardware pattern for the Whiskey Cov 10 Specify a hardware pattern for the Whiskey Cove PMIC LEDs.
11 11
12 The only supported pattern is hardware breathi 12 The only supported pattern is hardware breathing mode::
13 13
14 "0 2000 1 2000" 14 "0 2000 1 2000"
15 15
16 ^ 16 ^
17 | 17 |
18 Max-| --- 18 Max-| ---
19 | / \ 19 | / \
20 | / \ 20 | / \
21 | / \ / 21 | / \ /
22 | / \ / 22 | / \ /
23 Min-|- --- 23 Min-|- ---
24 | 24 |
25 0------2------4--> time (sec) 25 0------2------4--> time (sec)
26 26
27 The rise and fall times must be the same value 27 The rise and fall times must be the same value.
28 Supported values are 2000, 1000, 500 and 250 f 28 Supported values are 2000, 1000, 500 and 250 for
29 breathing frequencies of 1/4, 1/2, 1 and 2 Hz. 29 breathing frequencies of 1/4, 1/2, 1 and 2 Hz.
30 30
31 The set pattern only controls the timing. For 31 The set pattern only controls the timing. For max brightness the last
32 set brightness is used and the max brightness 32 set brightness is used and the max brightness can be changed
33 while breathing by writing the brightness attr 33 while breathing by writing the brightness attribute.
34 34
35 This is just like how blinking works in the LE 35 This is just like how blinking works in the LED subsystem,
36 for both sw and hw blinking the brightness can 36 for both sw and hw blinking the brightness can also be changed
37 while blinking. Breathing on this hw really is 37 while blinking. Breathing on this hw really is just a variant
38 mode of blinking. 38 mode of blinking.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.