On the Linux kernel the mpc52xx_setup_cpu() function used to do this fix up. Does uboot handle this for mpc5200 boards? If so, which version?
uboot is accessing these registers but it is not clear to me if the clocks are completely being set up.
The 5200lite code has been changed to this:
/* * Fix clock configuration. * * Firmware is supposed to be responsible for this. If you are creating a * new board port, do *NOT* duplicate this code. Fix your boot firmware * to set it correctly in the first place */ static void __init lite5200_fix_clock_config(void) { struct mpc52xx_cdm __iomem *cdm;
/* Map zones */ cdm = mpc52xx_find_and_map("mpc5200-cdm"); if (!cdm) { printk(KERN_ERR "%s() failed; expect abnormal behaviour\n", __FUNCTION__); return; }
/* Use internal 48 Mhz */ out_8(&cdm->ext_48mhz_en, 0x00); out_8(&cdm->fd_enable, 0x01); if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ out_be16(&cdm->fd_counters, 0x0001); else out_be16(&cdm->fd_counters, 0x5555);
/* Unmap the regs */ iounmap(cdm); }