K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2019-12-17T15:56:48.461343Z
K 7
svn:log
V 715
Update owc_gpiobus (one-wire over gpio) to the modern gpio_pin interface.

It used to be required that a device be a child of gpiobus(4) to manipulate
gpio pins. That requirement didn't work well for FDT-based systems with many
cross-hierarchy users of gpio, so a more modern framework was created that
removed the old hierarchy requirement.

These changes adapt the owc_gpiobus driver to use the newer gpio_pin_*
functions to acquire, release, and manipulate gpio pins. This allows a
single driver to work for both hinted-attachment and fdt-based systems, and
removes the requirement that any one-wire fdt nodes must appear at the root
of the devicetree.

Differential Revision:	https://reviews.freebsd.org/D22710

END