On Mon, 02 Jan 2023, Jean-Jacques Hiblot wrote: > Some HW design implement multicolor LEDs with several monochromatic LEDs. > Grouping the monochromatic LEDs allows to configure them in sync and use > the triggers. > The PWM multicolor LED driver implements such grouping but only for > PWM-based LEDs. As this feature is also desirable for the other types of > LEDs, this series implements it for any kind of LED device. Another for Pavel. > changes v6->v7: > - in led_mcg_probe() increment the counter at the end of the loop for > clarity. > > changes v5->v6: > - restore sysfs access to the leds when the device is removed > > changes v4->v5: > - Use "depends on COMPILE_TEST || OF" in Kconfig to indicate that OF > is a functional requirement, not just a requirement for the > compilation. > - in led_mcg_probe() check if devm_of_led_get_optional() returns an > error before testing for the end of the list. > - use sysfs_emit() instead of sprintf() in color_show(). > - some grammar fixes in the comments and the commit logs. > > changes v2->v3, only minor changes: > - rephrased the Kconfig descritpion > - make the sysfs interface of underlying LEDs read-only only if the probe > is successful. > - sanitize the header files > - removed the useless call to dev_set_drvdata() > - use dev_fwnode() to get the fwnode to the device. > > changes v1->v2: > - Followed Rob Herrings's suggestion to make the dt binding much simpler. > - Added a patch to store the color property of a LED in its class > structure (struct led_classdev). > > > Jean-Jacques Hiblot (6): > devres: provide devm_krealloc_array() > leds: class: simplify the implementation of devm_of_led_get() > leds: provide devm_of_led_get_optional() > leds: class: store the color index in struct led_classdev > dt-bindings: leds: Add binding for a multicolor group of LEDs > leds: Add a multicolor LED driver to group monochromatic LEDs > > Documentation/ABI/testing/sysfs-class-led | 9 + > .../bindings/leds/leds-group-multicolor.yaml | 64 +++++++ > drivers/leds/led-class.c | 65 +++++-- > drivers/leds/rgb/Kconfig | 10 ++ > drivers/leds/rgb/Makefile | 1 + > drivers/leds/rgb/leds-group-multicolor.c | 166 ++++++++++++++++++ > include/linux/device.h | 13 ++ > include/linux/leds.h | 3 + > 8 files changed, 317 insertions(+), 14 deletions(-) > create mode 100644 Documentation/devicetree/bindings/leds/leds-group-multicolor.yaml > create mode 100644 drivers/leds/rgb/leds-group-multicolor.c > > -- > 2.25.1 > -- Lee Jones [李琼斯]
