Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1731885

Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer

From David Lin <dtwlin@google.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer
Date 2017-09-13 23:30 +0200
Message-ID <upnom-4fk-27@gated-at.bofh.it> (permalink)
References <upk77-227-1@gated-at.bofh.it> <upmsh-3DB-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

On Wed, Sep 13, 2017 at 1:20 PM, Pavel Machek <pavel@ucw.cz> wrote:
>
> Hi!
>
> > These patch series add the LED_BRIGHTNESS_FAST flag support for
> > ledtrig-transient to use hrtimer so that platforms with high-resolution timer
> > support can have better accuracy in the trigger duration timing. The need for
> > this support is driven by the fact that Android has removed the timed_ouput [1]
> > and is now using led-trigger for handling vibrator control which requires the
> > timer to be accurate up to a millisecond. However, this flag support would also
> > allow hrtimer to co-exist with the ktimer without causing warning to the
> > existing drivers [2].
>
> NAK.
>
> LEDs do not need extra overhead, and vibrator control should not go
> through LED subsystem.
>
> Input subsystem includes support for vibrations and force
> feedback. Please use that instead.

I thought we are already over this discussion. As of now, the support
of vibrator through ledtrig is documented
(Documentation/leds/ledtrig-transient.txt) and there are users using
it.

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer David Lin <dtwlin@google.com> - 2017-09-13 20:00 +0200
  [PATCH v2 2/3] leds: Add the LED_BRIGHTNESS_FAST flag David Lin <dtwlin@google.com> - 2017-09-13 20:00 +0200
  [PATCH v2 3/3] led: ledtrig-transient: add support for hrtimer David Lin <dtwlin@google.com> - 2017-09-13 20:00 +0200
  [PATCH v2 1/3] leds: Replace flags bit shift with BIT() macros David Lin <dtwlin@google.com> - 2017-09-13 20:00 +0200
    Re: [PATCH v2 1/3] leds: Replace flags bit shift with BIT() macros Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-14 21:50 +0200
  Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-13 22:30 +0200
    Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer David Lin <dtwlin@google.com> - 2017-09-13 23:30 +0200
      Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-13 23:40 +0200
        Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer David Lin <dtwlin@google.com> - 2017-09-14 19:40 +0200
          Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-14 21:50 +0200
    Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-14 21:40 +0200
      Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer David Lin <dtwlin@google.com> - 2017-09-14 21:40 +0200
        Re: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-14 22:10 +0200
      Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-14 23:00 +0200
        Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-15 20:40 +0200
          Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-16 00:00 +0200
            Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-16 00:40 +0200
              Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-17 18:50 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-17 20:30 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-17 23:20 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-18 23:00 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-19 00:30 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-19 22:50 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-09-19 23:10 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-20 21:40 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-20 13:30 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-20 22:10 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-20 13:30 +0200
            Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-16 15:10 +0200
        Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-16 00:00 +0200
          Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-16 14:40 +0200
            Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-17 18:50 +0200
              Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-17 20:00 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-18 22:50 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Pavel Machek <pavel@ucw.cz> - 2017-09-20 13:20 +0200
                Re: Vibrations in input vs. LED was Re: [PATCH v2 0/3] led:  ledtrig-transient: add support for hrtimer Jacek Anaszewski <jacek.anaszewski@gmail.com> - 2017-09-20 20:50 +0200

csiph-web