On Tue, 15 Jan 2013 11:39:51 -0800 "Ira W. Snyder" <i...@ovro.caltech.edu> wrote:
> On Mon, Jan 14, 2013 at 06:59:59PM -0600, Kim Phillips wrote: > > On Tue, 8 Jan 2013 18:25:11 -0800 > > Barry Grussling <ba...@grussling.com> wrote: > > > > > While trying to bring up a custom MPC8308 based board I found > > > that the clocking was wrong. The comment in > > > include/configs/mpc8308_p1m.h led me to believe > > > setting HRCWH_PCI_HOST and HRCWH_PCI1_ARBITER_ENABLE in the > > > CONFIG_SYS_HRCW_HIGH should allow the system to work, but on > > > my newer version of the 8308 this is not working. Setting > > > the HRCWH_PCI_HOST bit (which doesn't exist according to the manual) > > > doesn't latch, and as such the im->reset.rcwh & HRCWH_PCI_HOST test > > > in speed.c fails. Since this board is running off the > > > CONFIG_83XX_CLKIN and is not a PCI client, I end up with 0xdeadbeef > > > and hosed clock values. > > > > > > This patch allows for proper clocks on the 8308 as a workaround > > > for the lack of HRCWH_PCI_HOST support. > > > > > > Signed-off-by: Barry Grussling <ba...@grussling.com> > > > > > > --- > > > > can I get an ack from someone else with an 8308 here please? This > > custom board fix has the possibility of bricking all existing > > 8308 based mainline boards. > > > > Thanks, > > > > Kim > > > > Hi Kim, Barry, > > I have an MPC8308RDB board, which is reported by U-Boot as: > CPU: e300c3, MPC8308, Rev: 1.0 at 400 MHz, CSB: 133.333 MHz > Board: Freescale MPC8308RDB Rev 1.0 > > Barry: what does your board report as it boots up? Is it a newer version > of the MPC8308 chip? Can you also dump the registers shown below? Use > "md e0000900 4" to dump them. Also, please send me the output of > "hexdump -C u-boot.bin | head" for your U-Boot image. > > Dumping the HRCWH register, I get the value a0606c00. > => md e0000900 4 > e0000900: 44060000 a0606c00 00000000 00000000 D....`l......... > > So on my board, the HRCWH_PCI_HOST bit *is* latched just fine. The > Freescale manual says the HRCWH register doesn't have this bit, but the > comments in include/configs/MPC8308RDB.h say that it must be set for the > board to work correctly. > > The MPC8308RDB is a standalone board, and does not define > CONFIG_83XX_PCICLK. Since the HRCWH_PCI_HOST bit was latched, my U-Boot > takes the first branch in the "if (im->reset.rcwh & HRCWH_PCI_HOST) {" > path, and continues to work as normal. > > In conclusion, the patch doesn't break my board. But I don't know why > Barry's board needs the patch. Thanks for taking a look at this, Ira. Barry, can you post your custom board support code? Does it set HRCWH_PCI_HOST in the RCW in flash? Can you confirm the RCW is being read from flash correctly? Kim _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot