Merge tag 'xfs-fixes-for-linus-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / Documentation / gpio / board.txt

diff --git a/Documentation/gpio/board.txt b/Documentation/gpio/board.txt
index 40884c4..a0f6189 100644 (file)
--- 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
 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
 
 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
 
 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.