Re: [DistroKit] [PATCH] v7a: kernel: use 8250-based serial driver for OMAP

[Robert Schwebel <r.schwebel@pengutronix.de>]

Applied to next.

On Fri, Dec 12, 2025 at 01:32:14PM +0100, Ahmad Fatoum wrote:
> v6.18-rc1 introduced commit ca8be8fc2c ("ARM: dts: am33xx-l4: fix UART
> compatible"), which changed the compatible for the serial device nodes
> to satisfy a binding checker warning.
> 
> Prior to that commit, there were two drivers that matched the UART
> on the AM335x, but now there is only one and it's not the one we had
> enabled in our kernel config.
> 
> Enable the 8250 UART driver and disable the old one we no longer use.
> As this changes the name of the UART devices from /dev/ttyO to /dev/ttyS
> by default (unless the CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP compatibility
> option is enabled), we also enable CONFIG_DRIVER_SERIAL_NS16550_OMAP_TTYS
> in barebox, so the correct TTY device is fixed up.
> 
> Reported-by: Michael Olbrich <mol@pengutronix.de>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
>  configs/platform-v7a/barebox-am335x-mlo.config | 2 +-
>  configs/platform-v7a/barebox.config            | 2 +-
>  configs/platform-v7a/kernelconfig              | 5 ++---
>  3 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/configs/platform-v7a/barebox-am335x-mlo.config b/configs/platform-v7a/barebox-am335x-mlo.config
> index 0390ce03603a..964ad484b126 100644
> --- a/configs/platform-v7a/barebox-am335x-mlo.config
> +++ b/configs/platform-v7a/barebox-am335x-mlo.config
> @@ -247,7 +247,7 @@ CONFIG_OF_GPIO=y
>  # CONFIG_SERIAL_DEV_BUS is not set
>  # CONFIG_DRIVER_SERIAL_ARM_DCC is not set
>  CONFIG_DRIVER_SERIAL_NS16550=y
> -# CONFIG_DRIVER_SERIAL_NS16550_OMAP_TTYS is not set
> +CONFIG_DRIVER_SERIAL_NS16550_OMAP_TTYS=y
>  # CONFIG_DRIVER_SERIAL_CADENCE is not set
>  # CONFIG_SERIAL_SIFIVE is not set
>  # end of serial drivers
> diff --git a/configs/platform-v7a/barebox.config b/configs/platform-v7a/barebox.config
> index 94158ea58381..7c696f1f48e1 100644
> --- a/configs/platform-v7a/barebox.config
> +++ b/configs/platform-v7a/barebox.config
> @@ -724,7 +724,7 @@ CONFIG_SERIAL_AMBA_PL011=y
>  CONFIG_DRIVER_SERIAL_IMX=y
>  CONFIG_DRIVER_SERIAL_STM32=y
>  CONFIG_DRIVER_SERIAL_NS16550=y
> -# CONFIG_DRIVER_SERIAL_NS16550_OMAP_TTYS is not set
> +CONFIG_DRIVER_SERIAL_NS16550_OMAP_TTYS=y
>  # CONFIG_DRIVER_SERIAL_CADENCE is not set
>  # CONFIG_DRIVER_SERIAL_LPUART32 is not set
>  # CONFIG_SERIAL_SIFIVE is not set
> diff --git a/configs/platform-v7a/kernelconfig b/configs/platform-v7a/kernelconfig
> index f637dd7518ea..2985ce961e01 100644
> --- a/configs/platform-v7a/kernelconfig
> +++ b/configs/platform-v7a/kernelconfig
> @@ -1966,7 +1966,8 @@ CONFIG_SERIAL_8250_BCM2835AUX=y
>  CONFIG_SERIAL_8250_FSL=y
>  # CONFIG_SERIAL_8250_DW is not set
>  # CONFIG_SERIAL_8250_RT288X is not set
> -# CONFIG_SERIAL_8250_OMAP is not set
> +CONFIG_SERIAL_8250_OMAP=y
> +# CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP is not set
>  # CONFIG_SERIAL_OF_PLATFORM is not set
>  
>  #
> @@ -1988,8 +1989,6 @@ CONFIG_SERIAL_IMX_CONSOLE=y
>  # CONFIG_SERIAL_UARTLITE is not set
>  CONFIG_SERIAL_CORE=y
>  CONFIG_SERIAL_CORE_CONSOLE=y
> -CONFIG_SERIAL_OMAP=y
> -CONFIG_SERIAL_OMAP_CONSOLE=y
>  # CONFIG_SERIAL_SIFIVE is not set
>  # CONFIG_SERIAL_SCCNXP is not set
>  # CONFIG_SERIAL_SC16IS7XX is not set
> -- 
> 2.47.3
> 
> 
> 

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