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Message-ID: <86802c440810141539x97ceaa4meaab109fae3d9d4c@mail.gmail.com> Date: Tue, 14 Oct 2008 15:39:44 -0700 From: "Yinghai Lu" <yinghai@...nel.org> To: donald.d.dugger@...el.com Cc: linux-kernel@...r.kernel.org Subject: Re: [PATCH] Enable console on PCI serial devices On Tue, Oct 14, 2008 at 3:31 PM, <donald.d.dugger@...el.com> wrote: > The problem with using a PCI serial card for the console is that, until > the PCI serial driver is loaded, output will be lost. The issue is that > PCI serial devices use a non-standard I/O port address and sometimes use > a non-standard crystal frequency. This patch gets around those problems > by allowing you to specify both I/O port address and crystal frequency on > the kernel command line. The serial console specification is enhanced to be: > > BBBBPNF-III/CCC > > where BBBB is the baud rate, P is the parity, N is the number of bits, > F is the flow control, III is the I/O port address (prefix with 0x for > hexadecimal) and CCC is the crystal frequency. -III and /CCC are optional > and can be omitted although -III must be specified if you want to set > /CCC. For example, the option I use is: > > console=ttyS0,115200-0xe880/921600 Did you check console=uart8250,io,0xe880,115200n8 hope you can expand that to support CCC YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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