Re: [PATCH 2/3] arm64: dts: imx93: add dma support for lpuart[2..9]

[Fabio Estevam]

Hi Frank,

On Wed, Aug 23, 2023 at 3:01 PM Frank Li <Frank.Li@xxxxxxx> wrote:
>
> Add dma support for lpuart[2..9]. The lpuart1 is debug console.

LPUART1 is the debug console on a particular board, but nothing prevents someone
to design an imx93 board that has another LPUART port as the debug console.

I suggest enabling DMA for all ports. That's what we do with other i.MX devices.

By the way, the fsl_lpuart driver disables DMA for the console:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/tty/serial/fsl_lpuart.c?h=v6.5-rc7#n1696