gpiolib: add support for disabling line bias

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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>

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Kent Gibson 2019-11-05 10:04:25 +08:00 • committed by Bartosz Golaszewski

parent 7b479a8448

commit 2148ad7790

3 changed files with 54 additions and 10 deletions

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include/uapi/linux/gpio.h

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