Where did you getfrom? It's not in the rs485 bindings, so will just be ignored.
RTS is generated as part of the UART, not as a random GPIO. For UART4 RTS will be GPIO15.
It looks like the RS485 overrides got added to the Pi4 uart4 overlay, but not the Pi5 variant.
See the README for the dt overrides for RS485 - https://github.com/raspberrypi/linux/bl ... 5300-L5322
Code:
rts-gpio = <&pca9535 7 GPIO_ACTIVE_HIGH>;RTS is generated as part of the UART, not as a random GPIO. For UART4 RTS will be GPIO15.
It looks like the RS485 overrides got added to the Pi4 uart4 overlay, but not the Pi5 variant.
See the README for the dt overrides for RS485 - https://github.com/raspberrypi/linux/bl ... 5300-L5322
Statistics: Posted by 6by9 — Wed Jul 30, 2025 4:09 pm