Messages in this thread |  | | From | David Lin <> | Subject | [PATCH 0/3] led: ledtrig-transient: add support for hrtimer | Date | Sun, 30 Apr 2017 14:36:58 -0700 |
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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
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 | 13 +++---- 3 files changed, 66 insertions(+), 11 deletions(-)
-- 2.13.0.rc0.306.g87b477812d-goog
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