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| author | Pavel Machek <pavel@ucw.cz> | 2020-08-11 15:48:13 +0200 |
|---|---|---|
| committer | Pavel Machek <pavel@ucw.cz> | 2020-08-17 18:04:15 +0200 |
| commit | a2f8e2b4f1817d9438b281d96ca45ca455707f95 (patch) | |
| tree | dfd4ae60cc1d0fc57c435e913137b7250d640e3f | |
| parent | fa31311c31634e5e900d61b1eb24df4c8555b5f8 (diff) | |
leds: we don't want people to use LED subsystem for vibrations
Remove notes about vibrations, as that is better done using input
subsystem.
Signed-off-by: Pavel Machek <pavel@ucw.cz>
| -rw-r--r-- | Documentation/leds/ledtrig-transient.rst | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/Documentation/leds/ledtrig-transient.rst b/Documentation/leds/ledtrig-transient.rst index eedfa1626e8a..63072f310660 100644 --- a/Documentation/leds/ledtrig-transient.rst +++ b/Documentation/leds/ledtrig-transient.rst @@ -17,12 +17,6 @@ set a timer to hold a state, however when user space application crashes or goes away without deactivating the timer, the hardware will be left in that state permanently. -As a specific example of this use-case, let's look at vibrate feature on -phones. Vibrate function on phones is implemented using PWM pins on SoC or -PMIC. There is a need to activate one shot timer to control the vibrate -feature, to prevent user space crashes leaving the phone in vibrate mode -permanently causing the battery to drain. - Transient trigger addresses the need for one shot timer activation. The transient trigger can be enabled and disabled just like the other leds triggers. @@ -159,7 +153,6 @@ repeat the following step as needed:: This trigger is intended to be used for the following example use cases: - - Control of vibrate (phones, tablets etc.) hardware by user space app. - Use of LED by user space app as activity indicator. - Use of LED by user space app as a kind of watchdog indicator -- as long as the app is alive, it can keep the LED illuminated, if it dies |