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* [PATCH] leds: we don't want people to use LED subsystem for vibrations
@ 2020-08-11 13:52 Pavel Machek
  0 siblings, 0 replies; only message in thread
From: Pavel Machek @ 2020-08-11 13:52 UTC (permalink / raw)
  To: linux-doc, kernel list, corbet, jacek.anaszewski, linux-leds

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Hi!

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

Best regards,
								Pavel

===

    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

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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2020-08-11 13:52 [PATCH] leds: we don't want people to use LED subsystem for vibrations Pavel Machek

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