Matt Sealey wrote: > Scott Wood wrote: >> Jon Smirl wrote: > >>>>> cell-index = <1>; >>>> What is cell-index for? >>> I was using it to control the bus number, is that the wrong >>> attribute? >> >> It shouldn't be specified at all -- the hardware has no concept of >> a device number. > > Well, all i2c devices have a chip id you can probe for,
I meant a controller device number (a.k.a. bus number), which (outside of documentation) is purely a Linux invention, and which is what cell-index was being used for above. > as for buses I think cell-index is a holdover from the way the PSC > code is organised on the MPC5200 for example - if you have multiple > buses which use the same registers, for example. It's redundant on > the PSC's for programming because they all use different register > offsets but if you move to other devices like the GPTs, then it is > then useful for debugging (it is far more interesting to say GPT1 > than GPT @ offset to match the) and in general for tweaking OTHER > parts of the chip (for instance the CDM - very relevant!) which use > single registers to control entire swathes of units. Right, that's what cell-index is for. This is different. :-) -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
