Re: [PATCH] serial: 8250: Add Armada 38x earlycon support

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Sep 02, 2026 at 03:17:09PM -0700, Rosen Penev wrote:
> Register the Armada 38x UART compatible with the built-in 8250
> earlycon implementation so stdout-path can enable an early console
> without adding a generic ns16550a compatible to the device tree.
> 
> Keeping the vendor-specific compatible avoids exposing the UART to the
> generic OF 8250 runtime driver while preserving the DesignWare driver
> Armada-specific runtime handling.
> 
> Assisted-by: Codex:GPT-5
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
>  drivers/tty/serial/8250/8250_early.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
> index 44ec209f37c4..265d49850e15 100644
> --- a/drivers/tty/serial/8250/8250_early.c
> +++ b/drivers/tty/serial/8250/8250_early.c
> @@ -175,6 +175,7 @@ EARLYCON_DECLARE(uart8250, early_serial8250_setup);
>  EARLYCON_DECLARE(uart, early_serial8250_setup);
>  OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup);
>  OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup);
> +OF_EARLYCON_DECLARE(uart, "marvell,armada-38x-uart", early_serial8250_setup);
>  OF_EARLYCON_DECLARE(uart, "nvidia,tegra20-uart", early_serial8250_setup);
>  OF_EARLYCON_DECLARE(uart, "snps,dw-apb-uart", early_serial8250_setup);
>  
> -- 
> 2.55.0
> 

How was this tested?

thanks,

greg k-h