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. changes v7->v8: - consistently use "LEDs group multicolor" throughout the code. - rename some variables with more explicit names. - improve comments. - use the 100-characters per line limit. 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 | 13 ++ drivers/leds/rgb/Makefile | 1 + drivers/leds/rgb/leds-group-multicolor.c | 164 ++++++++++++++++++ include/linux/device.h | 13 ++ include/linux/leds.h | 3 + 8 files changed, 318 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
