wenaideyu wenaideyu wrote on Tuesday, August 10, 2010 8:59 PM: > Hi: > thanks a lot for your advice. I have printed the value of > PCI_RST(GPIO[13]) before switching from NAND to PCI, the value is 1. > Itmeans PCI_RST has been driven high. > > but the board still resets while the kernel calls > "davinci_cfg_reg(DM646X_PCIEN)" in the file of board-dm646x-evm.c > > I just select the PCI bus support in the configuration of > kernel,and I do not select the support of mtd and ata in kernel. > > shoud I do some configuration about the Davincihd1080p evm while it acts > as a PCI host? > > best wishes!
By default, GPIO13 may not be used as PCI_RST. As per the wiki link, "The Altera CPLD on the board controls the mux switches depending on whether or not the EVM is plugged into a PCI backplane. To instead control the switches with a GPIO, the CPLD must be reprogrammed with a modified firmware..." - Hemant _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
