Messages in this thread | | | Date | Tue, 14 Oct 2008 15:39:44 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH] Enable console on PCI serial devices |
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On Tue, Oct 14, 2008 at 3:31 PM, <donald.d.dugger@intel.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
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