Hi Dan, On 9/11/19 8:01 PM, Dan Murphy wrote: > Add a documentation of LED Multicolor LED class specific > sysfs attributes. > > Signed-off-by: Dan Murphy <dmurphy@xxxxxx> > --- > .../ABI/testing/sysfs-class-led-multicolor | 73 +++++++++++++++++++ > 1 file changed, 73 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-class-led-multicolor > > diff --git a/Documentation/ABI/testing/sysfs-class-led-multicolor b/Documentation/ABI/testing/sysfs-class-led-multicolor > new file mode 100644 > index 000000000000..4ea54c2ad4c8 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-class-led-multicolor > @@ -0,0 +1,73 @@ > +What: /sys/class/leds/<led>/brightness > +Date: Sept 2019 > +KernelVersion: 5.5 > +Contact: Dan Murphy <dmurphy@xxxxxx> > +Description: read/write > + The multicolor class will redirect the device drivers call back > + function for brightness control to the multicolor class > + brightness control function. > + > + Writing to this file will update all LEDs within the group to a > + calculated percentage of what each color LED in the group is set > + to. The percentage is calculated via the equation below: > + > + led_brightness = requested_value * led_color_intensity/led_color_max_intensity > + > + For additional details please refer to > + Documentation/leds/leds-class-multicolor.rst. > + > + The value of the color is from 0 to > + /sys/class/leds/<led>/max_brightness. > + > +What: /sys/class/leds/<led>/colors/color_mix > +Date: Sept 2019 > +KernelVersion: 5.5 > +Contact: Dan Murphy <dmurphy@xxxxxx> > +Description: read/write > + The values written to this file should contain the intensity > + values of each multicolor LED within the colors directory. The > + index of given color is reported by the color_id file present in > + colors/<color> directory. The index determines the position in > + the sequence of intensities on which the related intensity > + should be passed to this file. > + > + For additional details please refer to > + Documentation/leds/leds-class-multicolor.rst. As already mentioned in the reply to Pavel - let's avoid the introduction of another sysfs file with multiple values. Color intensity files will only cache the value and actual write will be performed upon writing brightness file. > + > +What: /sys/class/leds/<led>/colors/<led_color>/color_id > +Date: Sept 2019 > +KernelVersion: 5.5 > +Contact: Dan Murphy <dmurphy@xxxxxx> > +Description: read only > + This file when read will return the index of the color in the > + color_mix. > + > + For additional details please refer to > + Documentation/leds/leds-class-multicolor.rst. > + > +What: /sys/class/leds/<led>/colors/<led_color>/intensity > +Date: Sept 2019 > +KernelVersion: 5.5 > +Contact: Dan Murphy <dmurphy@xxxxxx> > +Description: read/write > + The led_color directory is dynamically created based on the > + colors defined by the registrar of the class. > + The led_color can be but not limited to red, green, blue, > + white, amber, yellow and violet. There is one directory per color > + presented. The brightness file is created under each > + led_color directory and controls the individual LED color > + setting. > + > + The value of the color is from 0 to > + /sys/class/leds/<led>/colors/<led_color>/max_intensity. > + > +What: /sys/class/leds/<led>/colors/<led_color>/max_intensity > +Date: Sept 2019 > +KernelVersion: 5.5 > +Contact: Dan Murphy <dmurphy@xxxxxx> > +Description: read only > + Maximum intensity level for the LED color, default is > + 255 (LED_FULL). > + > + If the LED does not support different intensity levels, this > + should be 1. > -- Best regards, Jacek Anaszewski
