[LinuxBIOS] Problem to Support SuperIO Winbond W83977AF

Corey Osgood corey_osgood at verizon.net
Wed Apr 4 06:10:18 CEST 2007

Uwe Hermann wrote:
> On Tue, Apr 03, 2007 at 09:17:43AM +0200, ccases at navista.fr wrote:
>>> Without knowing which code you're using we cannot say very much. Can you
>>> post the full patch of the code you're trying to use?
>> The code is attach on mail.
> Try to use the w83627hf in v2, that might work out of the box. If it
> doesn't try to use 0x370, 0x3f0, or 0x2e in this line in auto.c:
> #define SERIAL_DEV PNP_DEV(0x3f0, W83977AF_SP1)
> Page 128 (section 9.2) of the datasheet might help if you still have problems
> afterwards...
> http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83977F_AF-A.pdf
> HTH, Uwe.

You may also need to do early_mtrr_init() (if it's even valid on geode)
before trying to bring up the serial port, I had to do this on my pesky
C3-based PCChips board.

Also, grab the datasheet for the w83977tf (google should find this
easily) if you go datasheet diving. Comparing the init sequence of the
two chips might give you some hint as to where they differ.


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