pcaled(4) on OpenBSD

The text b6218bc557b3, as OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8, OpenBSD 4.7, OpenBSD 4.6, OpenBSD 4.5, OpenBSD 4.4 shipped it.

Philips PCA9532/PCA9552 GPIO LED dimmer