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PCALED(4) Device Drivers Manual PCALED(4)

Philips PCA9532/PCA9552 GPIO LED dimmer

pcaled* at iic?
gpio* at pcaled?

The pcaled driver provides support for the Philips PCA9532 and PCA9552 GPIO controllers which are specifically optimized to dim LEDs in 256 discrete steps.

gpio(4), iic(4), intro(4), gpioctl(8)

The pcaled driver first appeared in OpenBSD 4.0.

The pcaled driver was written by Dale Rahn <drahn@openbsd.org>.
July 16, 2013 OpenBSD-current