Marc, No problem at all, better for it to be accessible to others in case they run across similar issues. No kidding? As far as I know the at91rm9200 is essentially the grandfather of the at91sam9g20 I am using now; similar design but two revisions older. As of yesterday afternoon I myself have begun to suspect there could be a problem with the spi controller hardware within the mcu. I have also been working with the board manufacturer in solving this problem as well. In an attempt to troubleshoot your driver I was comparing it with a different kernel driver recommended by my board manufacturer (Micromint) that was written by another customer. This particular driver has apparently been well received, however, I have yet to have any luck getting it to work. Even when a representative from the company sent it to me precompiled and tested, I still had no lluck getting it to work in an identical environment. Now I know the ADC works because I have userland code which directly accesses the ADC and I get correct output. Note that this code completely bypasses the atmel spi controller and operates directly on the ADC128S052s registers. Suspicious right? I assume you are using the atmel-spi driver as the master controller driver correct? If so, did you make any modifications to it at all? Thanks for your help guys. John Marc Pignat <marc.pignat@xxxxxxx> wrote: >Hi John, > >(You asked me in private, but I prefer to respond on the mailing list). > >This driver was working, I wrote (and tested it) in 2008 ;) >The hardware it was running on was a custom at91rm9200 based board with >a adc084s051. >The last time a checked it, it was on 2.6.28, and it was still working fine. > >I just had a look to the adc128s052 datasheet, and it looks compatible >with this driver. > >Guenter, the spi_write_then_read() function is really the good one. >In brief, the write selects the channel, then the read reads the data. > >I think the problem you're facing is either in the spi driver or in the >hardware. > > >Best regards > > >Marc _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
