diff options
author | David S. Miller <davem@davemloft.net> | 2016-10-30 12:42:58 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-10-30 12:42:58 -0400 |
commit | 27058af401e49d88a905df000dd26f443fcfa8ce (patch) | |
tree | 819f32113d3b8374b9fbf72e2202d4c4d4511a60 /Documentation/gpio | |
parent | 357f4aae859b5d74554b0ccbb18556f1df4166c3 (diff) | |
parent | 2a26d99b251b8625d27aed14e97fc10707a3a81f (diff) | |
download | op-kernel-dev-27058af401e49d88a905df000dd26f443fcfa8ce.zip op-kernel-dev-27058af401e49d88a905df000dd26f443fcfa8ce.tar.gz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Mostly simple overlapping changes.
For example, David Ahern's adjacency list revamp in 'net-next'
conflicted with an adjacency list traversal bug fix in 'net'.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/gpio')
-rw-r--r-- | Documentation/gpio/board.txt | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/gpio/board.txt b/Documentation/gpio/board.txt index 40884c4..a0f6189 100644 --- a/Documentation/gpio/board.txt +++ b/Documentation/gpio/board.txt @@ -6,7 +6,7 @@ Note that it only applies to the new descriptor-based interface. For a description of the deprecated integer-based GPIO interface please refer to gpio-legacy.txt (actually, there is no real mapping possible with the old interface; you just fetch an integer from somewhere and request the -corresponding GPIO. +corresponding GPIO). All platforms can enable the GPIO library, but if the platform strictly requires GPIO functionality to be present, it needs to select GPIOLIB from its @@ -162,6 +162,9 @@ The driver controlling "foo.0" will then be able to obtain its GPIOs as follows: Since the "led" GPIOs are mapped as active-high, this example will switch their signals to 1, i.e. enabling the LEDs. And for the "power" GPIO, which is mapped -as active-low, its actual signal will be 0 after this code. Contrary to the legacy -integer GPIO interface, the active-low property is handled during mapping and is -thus transparent to GPIO consumers. +as active-low, its actual signal will be 0 after this code. Contrary to the +legacy integer GPIO interface, the active-low property is handled during +mapping and is thus transparent to GPIO consumers. + +A set of functions such as gpiod_set_value() is available to work with +the new descriptor-oriented interface. |