From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Olaf Hering <olaf@aepfle.de>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: serial console autodetection not working on powermac
Date: Sun, 02 Dec 2007 12:11:19 +1100 [thread overview]
Message-ID: <1196557879.13230.149.camel@pasglop> (raw)
In-Reply-To: <20071201144021.GA13898@aepfle.de>
On Sat, 2007-12-01 at 15:40 +0100, Olaf Hering wrote:
> How is the serial console autodetection supposed to work with current
> kernels? arch/powerpc/kernel/legacy_serial.c is not compiled unless
> CONFIG_PPC_UDBG_16550 is selected.
> Even if I force this config option, legacy_serial_console remains -1 and
> the ch-a/ch-b check in check_legacy_serial_console() does not trigger.
> Can the ch-a/ch-b check in check_legacy_serial_console() trigger anyway?
>
> The autodetection used to work in earlier kernels.
>
> A compiletime check for CONFIG_SERIAL_PMACZILOG_TTYS is also required,
> to switch between ttyS and ttyPZ. Currently ttyS is hardcoded.
It might well have bitrotted. It should be taken out of that file
anyway. I'll have a look next week. Remind me if I forget :-)
Ben.
prev parent reply other threads:[~2007-12-02 1:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-01 14:40 serial console autodetection not working on powermac Olaf Hering
2007-12-02 1:11 ` Benjamin Herrenschmidt [this message]
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