Joakim Tjernlund wrote: > BTW, the fdr and dfsr calculations appears totally bogus. It seems > like the table is taken from some examples in AN2919 and it is pure luck > that it works most of the time. For me it does not work 100%, instead I get > random errors which hangs both the controller and the RTC device.
Well, the problem is that for a given frequency, there are several values of fdr/dfsr that theoretically work. So I picked what I thought would be good values for dfsr, but maybe it's not possible to pick such values. A while back, someone posted a version of this code that computed the values of fdr/dfsr. I nack'd that patch because I thought the algorithm was too convoluted, but perhaps what we really need is a combination of sorts. The code should read the value of DFSR from the register, and then calculate an appropriate FDR to go with it. -- Timur Tabi Linux kernel developer at Freescale _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
