Commit 4c0facddb7d8 ("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: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
New to the series.
Thanks,
Charles
Documentation/devicetree/bindings/gpio/gpio.txt | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt
index 2209c16..bccb8623 100644
--- a/Documentation/devicetree/bindings/gpio/gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio.txt
@@ -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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2.1.4
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