On May 12, 2006, at 9:36 AM, Ben Warren wrote:
Hello,
The CPU I'm using (MPC8349) has two hardware I2C interfaces, and I'd like to access the second one in U-boot. Implementing this looks easy to me, but I don't want to reinvent the wheel if it's already been done elsewhere. Has anyone done this? If not, I'll follow up with a proposal.
Depending on what you want to do, you can cheat and just change the pointer to the 2nd interface. If you want something more full featured up to the command level then I think some discussion would be required on how the commands should work for specifying which controller to use.
- kumar
OK, just as a suggestion how about an optional suffix on all the I2C commands. Ex:
iprobe.2 -- discover valid I2C interfaces on controller #2.
imw.0 (or just imw) -- memory write to address on controller #0 (or the only controller in most cases).
Seems like it wouldn't break anything to specify the controller this way.
Marc W. Howard