linux-kernel - Re: [PATCH] ARM: dts: am33xx: Add missing serial console speed

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Message-Id: <176229761135.2840692.14067519312360759831.b4-ty@baylibre.com>
Date: Tue, 04 Nov 2025 15:06:51 -0800
From: Kevin Hilman <khilman@...libre.com>
To: Tony Lindgren <tony@...mide.com>, 
 Bruno Thomsen <bruno.thomsen@...il.com>, Judith Mendez <jm@...com>, 
 Arnd Bergmann <arnd@...db.de>, Matti Vaittinen <mazziesaccount@...il.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>
Cc: linux-omap@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: am33xx: Add missing serial console speed


On Thu, 02 Oct 2025 11:53:05 +0200, Geert Uytterhoeven wrote:
> Without a serial console speed specified in chosen/stdout-path in the
> DTB, the serial console uses the default speed of the serial driver,
> unless explicitly overridden in a legacy console= kernel command-line
> parameter.
> 
> After dropping "ti,omap3-uart" from the list of compatible values in DT,
> AM33xx serial ports can no longer be used with the legacy OMAP serial
> driver, but only with the OMAP-flavored 8250 serial driver (which is
> mutually-exclusive with the former).  However, replacing
> CONFIG_SERIAL_OMAP=y by CONFIG_SERIAL_8250_OMAP=y (with/without enabling
> CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP) may not be sufficient to restore
> serial console functionality: the legacy OMAP serial driver defaults to
> 115200 bps, while the 8250 serial driver defaults to 9600 bps, causing
> no visible output on the serial console when no appropriate console=
> kernel command-line parameter is specified.
> 
> [...]

Applied, thanks!

[1/1] ARM: dts: am33xx: Add missing serial console speed
      commit: 9c95fc710b0d05f797db9e26d56524efa74f8978

Best regards,
-- 
Kevin Hilman <khilman@...libre.com>