Documentation/leds/leds-blinkm.rst

2 Leds BlinkM driver
5 The leds-blinkm driver supports the devices of the BlinkM family.
7 They are RGB-LED modules driven by a (AT)tiny microcontroller and
10 daisy-chain up to 127 BlinkMs on an I2C bus.
16 The interface this driver provides is 3-fold:
18 a) LED multicolor class interface for use with triggers
23   blinkm-<i2c-bus-nr>-<i2c-device-nr>:rgb:indicator
25   $ ls -h /sys/class/leds/blinkm-1-9:rgb:indicator
45   blinkm-<i2c-bus-nr>-<i2c-device-nr>-<color>
47   $ ls -h /sys/class/leds/blinkm-6-*
48   /sys/class/leds/blinkm-6-9-blue:
51   /sys/class/leds/blinkm-6-9-green:
54   /sys/class/leds/blinkm-6-9-red:
57 (same is /sys/bus/i2c/devices/6-0009/leds)
64   $ cat blinkm-6-9-blue/brightness
67   $ echo 200 > blinkm-6-9-blue/brightness
70   $ modprobe ledtrig-heartbeat
71   $ echo heartbeat > blinkm-6-9-green/trigger
75 b) Sysfs group to control rgb, fade, hsb, scripts ...
80 E.g. below /sys/bus/i2c/devices/6-0009/blinkm
82   $ ls -h /sys/bus/i2c/devices/6-0009/blinkm/