linux-dev/Documentation/ABI/testing/sysfs-class-led, branch master

docs: ABI: unify /sys/class/leds//brightness documentation

2020-10-30T12:14:48Z

This ABI is defined twice, one for normal leds and another one for multicolor ones. Ensure that just one definition is there at ABI. Acked-by: Pavel Machek Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/1115022e7f172b19ee8610f2ad28cc2f0ca93592.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman

docs: ABI: cleanup several ABI documents

2020-10-30T12:14:29Z

There are some ABI documents that, while they don't generate any warnings, they have issues when parsed by get_abi.pl script on its output result. Address them, in order to provide a clean output. Reviewed-by: Tom Rix # for fpga-manager Reviewed-By: Kajol Jain # for sysfs-bus-event_source-devices-hv_gpci and sysfs-bus-event_source-devices-hv_24x7 Acked-by: Jonathan Cameron #for IIO Acked-by: Oded Gabbay # for Habanalabs Acked-by: Vaibhav Jain # for sysfs-bus-papr-pmem Acked-by: Cezary Rojewski # for catpt Acked-by: Suzuki K Poulose Acked-by: Ilya Dryomov # for rbd Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/5bc78e5b68ed1e9e39135173857cb2e753be868f.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman

docs: ABI: testing: make the files compatible with ReST output

2020-10-30T12:07:01Z

Some files over there won't parse well by Sphinx. Fix them. Acked-by: Jonathan Cameron # for IIO Acked-by: Fabrice Gasnier Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/58cf3c2d611e0197fb215652719ebd82ca2658db.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman

leds: class: Add new optional brightness_hw_changed attribute

2017-01-29T18:59:42Z

Some LEDs may have their brightness level changed autonomously (outside of kernel control) by hardware / firmware. This commit adds support for an optional brightness_hw_changed attribute to signal such changes to userspace (if a driver can detect them): What: /sys/class/leds//brightness_hw_changed Date: January 2017 KernelVersion: 4.11 Description: Last hardware set brightness level for this LED. Some LEDs may be changed autonomously by hardware/firmware. Only LEDs where this happens and the driver can detect this, will have this file. This file supports poll() to detect when the hardware changes the brightness. Reading this file will return the last brightness level set by the hardware, this may be different from the current brightness. Drivers which want to support this, simply add LED_BRIGHT_HW_CHANGED to their flags field and call led_classdev_notify_brightness_hw_changed() with the hardware set brightness when they detect a hardware / firmware triggered brightness change. Signed-off-by: Hans de Goede Acked-by: Pavel Machek Signed-off-by: Jacek Anaszewski

cleanup LED documentation and make it match reality

2016-11-22T11:07:03Z

sysfs-class-led fails to mention some important details. Also fix led vs LED and english. Signed-off-by: Pavel Machek Signed-off-by: Jacek Anaszewski

Documentation: move oneshot trigger attributes documentation to ABI

2016-08-29T13:06:32Z

Documentation of sysfs interface should be in ABI in the first place. This moves relevant part of documentation and mentions where to look for it. Fix trivial typos whilst we are at it. Signed-off-by: Rafał Miłecki Signed-off-by: Jacek Anaszewski

Fix common misspellings

2011-03-31T14:26:23Z

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi

leds: add output inversion option to backlight trigger

2011-01-13T16:03:06Z

Extend the LED backlight tirgger driver with an option that allows for inverting the trigger output polarity. With the invertion option provided, I (ab)use the backlight trigger for driving a LED that indicates LCD display blank condtition on my Amstrad Delta videophone. Since the machine has no dedicated power LED, it was not possible to distinguish if the display was blanked, or the machine was turned off, without touching it. The invert sysfs control is patterned after a similiar function of the GPIO trigger driver. [akpm@linux-foundation.org: make output match input, tighten input checking] [akpm@linux-foundation.org: make output match input, tighten input checking] Signed-off-by: Janusz Krzysztofik Cc: Paul Mundt Acked-by: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

led: document sysfs interface

2009-08-28T19:21:12Z

Also fix Documentation/led-class.txt, the acceptable range of values for brightness is 0-max_brightness, not 0-255. Cc: Richard Purdie Signed-off-by: Corentin Chary Signed-off-by: Len Brown