Document the ABI change in Documentation/ABI/testing/sysfs-class-led. Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx> --- v7: - separated from patch 3 --- Documentation/ABI/testing/sysfs-class-led | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-led b/Documentation/ABI/testing/sysfs-class-led index 3646ec8..20357d5 100644 --- a/Documentation/ABI/testing/sysfs-class-led +++ b/Documentation/ABI/testing/sysfs-class-led @@ -7,6 +7,17 @@ Description: have hardware brightness support so will just be turned on for non-zero brightness settings. The value is between 0 and /sys/class/leds/<led>/max_brightness. + If a driver uses the RGB LED feature then this attribute is + interpreted as a HSV color model value: + <0000000F><HHHHHHHH><SSSSSSSS><VVVVVVVV> + Usage of the least byte is identical to monochrome mode. + Saturation can be 0-255 and hue 0-251 (Colour circle is mapped + to 0-252). If hue and saturation both are 0 the current colour + is preserved and only the brightness is set. This ensures + backwards compatibility with monochrome mode, e.g. for + led_set_brightness() calls from triggers. + Flag F enables setting hue and saturation even if both are 0. + For details and examples see Documentation/leds/leds-class.txt What: /sys/class/leds/<led>/max_brightness Date: March 2006 -- 2.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
