Re: [PATCH 0/2] sunxi: Support UART1 and UART2 on the T113

[Andre Przywara <andre.przywara@arm.com>]

On Thu, 11 Apr 2024 15:14:14 +1000
John Watts <contact@jookia.org> wrote:

Hi John,

> The T113 supports UART1 and UART2 on PG and PD pins respectively.
> Add support for these in U-Boot so we can use them.

So those bits are just for the *debug* UARTs. Traditionally this is UART0,
with some particular pinmux, sometimes UART2 on older SoCs.

So is there a board that uses those pins for a debug console? I want to
avoid making this code even messier than it already is, without good
reasons. Also please note that I tried to clean this up here:
https://patchwork.ozlabs.org/project/uboot/patch/20240103001239.17482-20-andre.przywara@arm.com/

> Note: I'm not entirely sure if the PD pins should be default, they
> overlap with the LCD pins. I am however using this on a real board.

Is this a custom board? Could you consider using UART0 for debug then?
This one doesn't support RTS/CTS, so you do not waste the more capable
UARTs for debug.

Cheers,
Andre

> Signed-off-by: John Watts <contact@jookia.org>
> ---
> John Watts (2):
>       sunxi: Support UART1 on the T113
>       sunxi: Support UART2 on the T113
> 
>  arch/arm/mach-sunxi/board.c | 9 +++++++--
>  include/sunxi_gpio.h        | 1 +
>  2 files changed, 8 insertions(+), 2 deletions(-)
> ---
> base-commit: 777c28460947371ada40868dc994dfe8537d7115
> change-id: 20240411-t113serial-a6e9ca8d8848
> 
> Best regards,