Lennart, On Sun, 22 Apr 2007 11:41:51 -0400, Lennart Sorensen wrote: > On Fri, Apr 20, 2007 at 07:49:33PM +0200, Jean Delvare wrote: > > The scx200_acb driver was heavily modified in 2.6.17 and 2.6.18, not > > much since then. I am not familiar with the hardware so I can't comment > > on which chips are supposed to work and which aren't. > > Well 2.6.18's scx200_acb works on the geode LX module I have, but no on > the geode sc1200 module (where scx200_i2c does work). > > scx200_acb doesn't detect any device that it can drive (nothing in dmesg > at all when loaded) on the sc1200.
On the SCx200, the scx200_acb driver doesn't actually detect the device. It uses arbitrary I/O addresses and hopes for the best. By default, two buses are created, at 0x820 and 0x840. This might simply not be the right addresses for your board. See Documentation/i2c/busses/scx200_acb. You should enable CONFIG_I2C_DEBUG_BUS and see what the driver says when being loaded. I seem to remember there has been a patch floating around to auto-detect the right ports back in June 2006, but it seems to have been lost somehow. Jordan, do you remember? > I believe the main changes that > happened to scx200_acb was adding support for the newer CSxxxx chipsets, > such as the one used with the geode LX (which does work now). Not only. There was also a log of bug fixing. -- Jean Delvare - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
