Hello,
while writing a new DT file I stumbled across this warning
.../arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dev.dtb: serial@2810000: Unevaluated properties are not allowed ('rs485-rts-active-high' was unexpected)
From schema: .../Documentation/devicetree/bindings/serial/8250_omap.yaml
The property is currently used in the OMAP serial driver
drivers/tty/serial/omap-serial.c
1511: if (of_property_read_bool(np, "rs485-rts-active-high")) {
and a few DT files.
I do require it, despite being wrong, because of some legacy reasons [1].
Before commit 767d3467eb60 ("dt-bindings: serial: 8250_omap: drop rs485
properties") this property was allowed.
What should I do?
- ignore the warning
- send a patch to reintroduce `rs485-rts-active-high: true` in 8250_omap.yaml
- something else?
I would be inclined to send the following patch, do you agree?
diff --git a/Documentation/devicetree/bindings/serial/8250_omap.yaml b/Documentation/devicetree/bindings/serial/8250_omap.yaml
index eb3488d8f9ee..e634e98aa994 100644
--- a/Documentation/devicetree/bindings/serial/8250_omap.yaml
+++ b/Documentation/devicetree/bindings/serial/8250_omap.yaml
@@ -70,6 +70,7 @@ properties:
dsr-gpios: true
rng-gpios: true
dcd-gpios: true
+ rs485-rts-active-low: true
rts-gpio: true
power-domains: true
clock-frequency: true
[1] https://lore.kernel.org/all/ZBItlBhzo+YETcJO@xxxxxxxxxxxxxxxxxxxxxxxxxxxx/
Francesco
