Yes, that is a device on the lpb via an fpga. We have tried to configure the chip select 4 configuration register at address MBAR + 0x0310, and it seems to be ok. what do you mean with “chip select parameters”? We have been able to edit it in U-BOOT, and the board (that chip) now works… The strange thing, is that when we read in linux, at that address, we see other content value… Suggestions?
Thanks Lorenzo On 13/nov/2013, at 08:32 AM, Anatolij Gustschin <ag...@denx.de> wrote: > On Tue, 12 Nov 2013 20:23:20 +0100 > neorf3k <neor...@gmail.com> wrote: > >> we have tried to read and program an 8bit register with 32bit address. >> we have mapped it with: ioremap, kmalloc etc… and then using: outb, >> iowrite8 etc.. but when we write to it, the value doesn’t change… >> with other memory location is ok. >> That is an 8 bit register, located at 0x10020000 in a mpc5200b >> architecture. we are using kernel 2.6.33. >> what could be? > > 0x10020000 is not in the internal register memory map, so it > is probably a device on the LocalPlus bus. Did you configure > the chip select parameters for this device and did you enable > the associated chip select? > > HTH, > > Anatolij > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
