Guntupalli, Manikanta schreef op 2023-05-10 18:26:
Hi Maarten,
-----Original Message-----In ZynqMp platform Cadence UART Controller RTS signal routed to
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Subject: Re: [PATCH 0/2] Add rs485 support to uartps driver
Manikanta Guntupalli wrote 2023-04-26 14:29:
> Add optional gpio property to uartps node to support rs485 Add rs485
> support to uartps driver
>
> Manikanta Guntupalli (2):
> dt-bindings: Add optional gpio property to uartps node to support
> rs485
> tty: serial: uartps: Add rs485 support to uartps driver
>
> .../devicetree/bindings/serial/cdns,uart.yaml | 5 +
> drivers/tty/serial/xilinx_uartps.c | 96 ++++++++++++++++++-
> 2 files changed, 100 insertions(+), 1 deletion(-)
Why would you want to use a GPIO and not RTS for choosing the direction as
is more common in this case?
external through the PL(Programmable Logic) design not through
Multiplexed IO.
Then why not route RXD & TXD to the PL as well and connect the module to a
PMOD connector connected to the PL? But I admit that a GPIO always works as
well.