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Commit f9e3a419 authored by Charles Keepax's avatar Charles Keepax Committed by Linus Walleij
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gpio: of: Reflect decoupling of open collector and active low/high 



Commit 4c0facdd ("gpio: core: Decouple open drain/source flag with
active low/high") decoupled the open collector outputs from active
low/high but did not update the documentation.

Update the device tree documentation to correctly reflect this new
separation between the two concepts.

Signed-off-by: default avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 6dc0048c

Documentation/devicetree/bindings/gpio/gpio.txt

+4 −3
Original line number Diff line number Diff line
@@ -74,11 +74,12 @@ GPIO pin number, and GPIO flags as accepted by the "qe_pio_e" gpio-controller. 
Optional standard bitfield specifiers for the last cell:



- Bit 0: 0 means active high, 1 means active low

- Bit 1: 1 means single-ended wiring, see:

- Bit 1: 0 mean push-pull wiring, see:

           https://en.wikipedia.org/wiki/Push-pull_output

         1 means single-ended wiring, see:

           https://en.wikipedia.org/wiki/Single-ended_triode

	   When used with active-low, this means open drain/collector, see:

- Bit 2: 0 means open-source, 1 means open drain, see:

           https://en.wikipedia.org/wiki/Open_collector

	   When used with active-high, this means open source/emitter



1.1) GPIO specifier best practices

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