[Voyage-linux] modprobe scx200_acb : probe failed

[Thorsten von Eicken]

> I'm getting an error ( : probe failed ) when I try to modprobe scx200_acb. Despite the error, I'm still able to load the lm77 module, and get temperature readings from /sys/bus/i2c/drivers/lm77/.... Since I have a work around, this issue isn't pressing, but I still have a two questions about the reported error.


Same here with a non-voyage 2.6.11 kernel. I enabled debugging and added 
a bit more info into the relevant message and I get:

i2c /dev entries driver
scx200_acb: ACBCTL2 readback failed, got 0xff
  : probe failed

The driver write 0x70 to ACBCTL2 and expects to read 0x70 back, but it 
gets 0xff instead. Looked into the manual briefly, but seems too 
complicated to figure out quickly. As you mention, lm77 works fine 
thereafter. Weird...
	Thorsten