On Tue, 27 Dec 2022, Joseph Strauss wrote: > Added multicolor support to the BlinkM driver, making it easier to > control from userspace. The BlinkM LED is a programmable RGB LED. The > driver currently supports only the regular LED sysfs class, resulting in > the creation of three distinct classes, one for red, green, and blue. > The user then has to input three values into the three seperate > brightness files within those classes. The multicolor LED framework > makes the device easier to control with the multi_intensity file: the > user can input three values at once to form a color, while still > controlling the lightness with the brightness file. > > The main struct blinkm_led has changed slightly. A struct > led_classdev_mc has been added to represent the multicolor sysfs class, > and an additional struct led_classdev pointer has been added for > convenience, which points to the struct led_classdev within struct > led_classdev_mc. The struct led_classdev for the regular sysfs classes > remain. Additionally, a field representing the multicolor LED has been > added to the struct blinkm_data, seperate from the blinkm_leds[3] array. > > In the blinkm_probe function, the multicolor LED class is registered > after the regular LED classes. The blinkm_set_mc_brightness() function > had to be added to calculate the three color components and then set the > fields of the blinkm_data structure accordingly. > > Signed-off-by: Joseph Strauss <jstrauss@xxxxxxxxxxx> > --- > Changes in v2: > - Replaced instances of the constant 3 with NUM_LEDS, where applicable > - Fixed formatting errors > - Replaced loop inside of blinkm_set_mc_brightness() with equivalent > statements > - Changed id of multicolor class from 4 to 3 > - Replaced call to devm_kmalloc_array() with devm_kcalloc() > > Documentation/leds/leds-blinkm.rst | 26 +++++- > drivers/leds/Kconfig | 1 + > drivers/leds/leds-blinkm.c | 143 +++++++++++++++++++++++------ > 3 files changed, 137 insertions(+), 33 deletions(-) Another one for Pavel until I can build some knowledge. -- Lee Jones [李琼斯]
