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leds: we don't want people to use LED subsystem for vibrations

Message ID 20200811135226.GA26056@duo.ucw.cz
State New
Headers show
Series leds: we don't want people to use LED subsystem for vibrations | expand

Commit Message

Pavel Machek Aug. 11, 2020, 1:52 p.m. UTC 
Hi!

This will eventually go in, unless I hear some good reasons not to.

Best regards,
								Pavel
diff mbox series

Patch

===

    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>

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