From: David Lin <dtwlin@google.com>
To: corbet@lwn.net, rpurdie@rpsys.net, jacek.anaszewski@gmail.com,
pavel@ucw.cz, hdegoede@redhat.com, gregkh@linuxfoundation.org
Cc: robh@kernel.org, romlem@google.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org,
David Lin <dtwlin@google.com>
Subject: [PATCH v2 0/3] led: ledtrig-transient: add support for hrtimer
Date: Wed, 13 Sep 2017 10:53:57 -0700 [thread overview]
Message-ID: <20170913175400.42744-1-dtwlin@google.com> (raw)
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].
David
[1] https://patchwork.kernel.org/patch/8664831/
[2] https://lkml.org/lkml/2015/4/28/260
Changes from v1 to v2:
- Convert all the bit shifting flag in leds.h to use the BIT macro.
- Removed inline modifiers for the timer helper function.
David Lin (3):
leds: Replace flags bit shift with BIT() macros
leds: Add the LED_BRIGHTNESS_FAST flag
led: ledtrig-transient: add support for hrtimer
Documentation/leds/leds-class.txt | 5 +++
drivers/leds/trigger/ledtrig-transient.c | 59 +++++++++++++++++++++++++++++---
include/linux/leds.h | 19 +++++-----
3 files changed, 69 insertions(+), 14 deletions(-)
--
2.14.1.581.gf28d330327-goog
next reply other threads:[~2017-09-13 17:53 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 17:53 David Lin [this message]
2017-09-13 17:53 ` [PATCH v2 1/3] leds: Replace flags bit shift with BIT() macros David Lin
2017-09-14 19:43 ` Jacek Anaszewski
2017-09-13 17:53 ` [PATCH v2 2/3] leds: Add the LED_BRIGHTNESS_FAST flag David Lin
2017-09-13 17:54 ` [PATCH v2 3/3] led: ledtrig-transient: add support for hrtimer David Lin
2017-09-13 20:20 ` [PATCH v2 0/3] " Pavel Machek
2017-09-13 21:20 ` David Lin
2017-09-13 21:34 ` Pavel Machek
2017-09-14 17:31 ` David Lin
2017-09-14 19:42 ` Pavel Machek
2017-09-14 19:31 ` Jacek Anaszewski
2017-09-14 19:38 ` David Lin
2017-09-14 20:03 ` Jacek Anaszewski
2017-09-14 20:58 ` Vibrations in input vs. LED was " Pavel Machek
2017-09-15 18:34 ` Dmitry Torokhov
2017-09-15 21:55 ` Jacek Anaszewski
2017-09-15 22:30 ` Dmitry Torokhov
2017-09-17 16:41 ` Jacek Anaszewski
2017-09-17 18:22 ` Pavel Machek
2017-09-17 21:15 ` Pavel Machek
2017-09-18 20:50 ` Jacek Anaszewski
2017-09-18 22:29 ` Dmitry Torokhov
2017-09-19 20:45 ` Jacek Anaszewski
2017-09-19 21:07 ` Dmitry Torokhov
2017-09-20 19:31 ` Jacek Anaszewski
2017-09-20 11:29 ` Pavel Machek
2017-09-20 20:08 ` Jacek Anaszewski
2017-10-06 11:48 ` Pavel Machek
2017-10-06 20:57 ` Jacek Anaszewski
2017-09-20 11:26 ` Pavel Machek
2017-09-28 5:03 ` David Lin
2017-09-28 5:43 ` Dmitry Torokhov
2017-09-28 19:22 ` David Lin
2017-10-05 0:40 ` Dmitry Torokhov
2017-09-16 12:59 ` Pavel Machek
2017-09-15 21:55 ` Jacek Anaszewski
2017-09-16 1:58 ` Pavel Machek
2017-09-17 16:41 ` Jacek Anaszewski
2017-09-17 17:50 ` Pavel Machek
2017-09-18 20:43 ` Jacek Anaszewski
2017-09-20 11:15 ` Pavel Machek
2017-09-20 18:44 ` Jacek Anaszewski
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