tree 43deadf60dfe7760cbb917f5460d416cd3c43ed5
parent 7b479a8448c2e5ced36ca6a2d03178b920298ee5
author Kent Gibson <warthog618@gmail.com> 1572919465 +0800
committer Bartosz Golaszewski <bgolaszewski@baylibre.com> 1573572630 +0100

gpiolib: add support for disabling line bias

Allow pull up/down bias to be disabled, allowing the line to float
or to be biased only by external circuitry.
Use case is for where the bias has been applied previously, either
by default or by the user, but that setting may conflict with the
current use of the line.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>