Date: Thu, 20 May 2010 20:45:22 +0200 From: Andreas Tobler <andreast-list@fgznet.ch> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: iic/i2c debugging on PowerMac Message-ID: <4BF58342.7010707@fgznet.ch>
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Hi,
I'm trying to access (read/write) an i2c device on my G5. The problem
is, I do not know the right i2c address although I have it from the
device-tree, it's 0x15e.
I read about the i2c utilitiy which requires the iic driver compiled
into the kernel. Done that and it seems it is there:
unin0
iichb0 pnpinfo name=i2c compat=keywest-i2c
iicbus0
iic0 at addr=0
fcu0 pnpinfo name=fan compat=fcu at addr=0x15e
But I do not have this device entry in /dev. Trying to create one does
not work.
mknod /dev/iic0 c 103 0
mknod: /dev/iic0: No such file or directory
This is a netboot environment, might this be the cause of not being able
to create the device?
Or do I have another issue?
Has anyone experience with iic buses on PowerMac or hints on debug
techniques?
TIA,
Andreas
help
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