Hi.
We have a new board which we are suing with U-boot. The CPU is a P2020. I am having a few minor problems, and I was hoping to get some help.
Boot Count. We are keen to use the boot counter feature, but Iam struggling to find a suitable register in the P2020. The file arch/powerpc/lib/bootcount.c list a few locations that work with other PowerPC chips, but I can't find any of those registers in the P2020 documentation.
Me too on finding such a register.
SPI Flash seems very slow. The SPI flash accesses all seem to be veryslow. I can increase the SPI clock (to 40 MHz) and this helps, but the real problem is the code in drivers/spi/fsl_espi.c. Here there is an 80us delay after each 32-bit value is written to the TX FIFO. I don't understand why this delay is there? If I reduce it to 2 usec everything still works, and SPI Flash accesses are much faster. I can easily produce a patch to remove or reduce this delay, but I'd rather know why it was there in the first place?
Timer Interrupts seem to stop. Once U-boot has started the timerinterrupts seem to stop. I have added a test command that prints out the timestamp variable (from arch/powerpc/lib/interrupts.c). I can see that when we enter the interactive loop this variable stops incrementing. I can add boot scripts that output this value, and it is incrementing until the console becomes interactive. Has anyone else seen a problem like this?
I have but only when running from our BDI2000/BDI3000 emulator. We figured it was something with the emulator settings but I was never convinced. If you find out why, please let me know. Oh, we have a P2010 though.
Jocke