Changes in sysfs-class-led-trigger-pattern

aa172ba7 - leds: trigger: pattern: Add support for hrtimer

Tue, 16 Apr 2024 20:18:05 +0000

leds: trigger: pattern: Add support for hrtimerCurrently, led pattern trigger uses timer_list to schedule brightnesschanging. As we know from timer_list API [1], it's not accurate tomilliseconds and depends on HZ granularity.Example:"0 10 0 0 50 10 50 0 100 10 100 0 150 10 150 0 200 10 200 0 250 10 250 0",we expect it to be 60ms long, but it can actually be up to ~120ms(add ~10ms for each pattern when HZ == 100).But sometimes, userspace needs time accurate led patterns to make surethat pattern will be executed during expected time slot.To achieve this goal the patch introduces optional hrtimer usage forled trigger pattern, because hrtimer is microseconds accurate timer.[1]: kernel/time/timer.c#L104Signed-off-by: Martin Kurbanov Link: https://lore.kernel.org/r/20240416201847.357099-1-mmkurbanov@salutedevices.comSigned-off-by: Lee Jones List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern

1ca5d41c - docs: ABI: sysfs-class-led-trigger-pattern: remove repeat duplication

Wed, 19 May 2021 08:51:46 +0000

docs: ABI: sysfs-class-led-trigger-pattern: remove repeat duplicationAs reported by scripts/get_abi.pl: Warning: /sys/class/leds//repeat is defined 2 times: Documentation/ABI/testing/sysfs-class-led-driver-el15203000:0 Documentation/ABI/testing/sysfs-class-led-trigger-pattern:28The definition for the EL15203000 is just a special case ofthe sysfs led class. So, drop it and mentions the possibleexception at the class definition.Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/394580bd2e007ffb640f97212973a772ed8f0409.1621413933.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern

26a07553 - docs: ABI: sysfs-class-led-trigger-pattern: remove hw_pattern duplication

Fri, 30 Oct 2020 07:40:57 +0000

docs: ABI: sysfs-class-led-trigger-pattern: remove hw_pattern duplicationThe ABI files are supposed to be unique. Yet,in the specific case of hw_pattern, there are some duplicatedentries as warned by scripts/get_abi.pl: Warning: /sys/class/leds//hw_pattern is defined 3 times: Documentation/ABI/testing/sysfs-class-led-trigger-pattern:14 Documentation/ABI/testing/sysfs-class-led-driver-sc27xx:0 Documentation/ABI/testing/sysfs-class-led-driver-el15203000:0Drop the duplication from the ABI files, moving the specificdefinitions to files inside Documentation/leds.Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/038e57881550550b298e598f8f9b7f20515cbe15.1604042072.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern

1dd70937 - dt-bindings: leds: Add pattern initialization from Device Tree

Wed, 09 Jan 2019 14:44:45 +0000

dt-bindings: leds: Add pattern initialization from Device TreeDocument new led-pattern property for initialization of LED triggers.The property format is trigger-specific (except being array ofintegers). For pattern trigger, the explanation of pattern format wasmoved to a common file shared with sysfs ABI.Signed-off-by: Krzysztof Kozlowski Acked-by: Pavel Machek Reviewed-by: Rob Herring Signed-off-by: Jacek Anaszewski List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern

406e7f98 - Documentation: ABI: led-trigger-pattern: Fix typos

Wed, 07 Nov 2018 13:45:24 +0000

Documentation: ABI: led-trigger-pattern: Fix typos - Spelling s/brigntess/brightness/, - Double "use".Signed-off-by: Geert Uytterhoeven Acked-by: Pavel Machek Signed-off-by: Jacek Anaszewski List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern

5fd752b6 - leds: core: Introduce LED pattern trigger

Thu, 11 Oct 2018 04:07:14 +0000

leds: core: Introduce LED pattern triggerThis patch adds a new LED trigger that LED device can configureto employ software or hardware pattern engine.Consumers can write 'pattern' file to enable the software patternwhich alters the brightness for the specified duration with onesoftware timer.Moreover consumers can write 'hw_pattern' file to enable the hardwarepattern for some LED controllers which can autonomously controlbrightness over time, according to some preprogrammed hardwarepatterns.Signed-off-by: Raphael Teysseyre Signed-off-by: Baolin Wang Signed-off-by: Jacek Anaszewski List of files: /linux-6.15/Documentation/ABI/testing/sysfs-class-led-trigger-pattern