Hello list,

inside the automatic U-Boot patch tracking system a new ticket [DNX#2006040142001249] was created:

<snip>

• Switched default PCI speed for 8540 ADS back to 33MHz
• Added comments and a printf to warn that PCI-X won't work at 33MHz

---

cpu/mpc85xx/pci.c | 3 +++ doc/README.mpc85xxads | 3 +++ include/configs/MPC8540ADS.h | 6 +++++- 3 files changed, 11 insertions(+), 1 deletions(-)

db86eda9e3cd0b3e89bd50965a49b6232f1d97c3 diff --git a/cpu/mpc85xx/pci.c b/cpu/mpc85xx/pci.c index ca11bce..cfb7dcd 100644 --- a/cpu/mpc85xx/pci.c +++ b/cpu/mpc85xx/pci.c @@ -72,6 +72,9 @@ pci_mpc85xx_init(struct pci_controller *

if (!(gur->pordevsr & PORDEVSR_PCI)) { /* PCI-X init */

• if (CONFIG_SYS_CLK_FREQ < 66000000)
  

• 	printf("PCI-X will only work at 66 MHz\n");
  

• reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E; pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);

diff --git a/doc/README.mpc85xxads b/doc/README.mpc85xxads index f0cf782..ae8202b 100644 --- a/doc/README.mpc85xxads +++ b/doc/README.mpc85xxads @@ -100,6 +100,9 @@ Updated 13-July-2004 Jon Loeliger SW7[1:4] = 0101 = 5 => 5 x 66 = 330 CCB Sysclk SW7[5:6] = 01 => 5:2 x 330 = 825 Core clock

• In order to use PCI-X (only in the first PCI slot. The one with
• the RIO connector), you need to set SW1[4] (config) to 1 (off).
• Also, configure the board to run PCI at 66 MHz.

2. MEMORY MAP TO WORK WITH LINUX KERNEL

diff --git a/include/configs/MPC8540ADS.h b/include/configs/MPC8540ADS.h index 81ee945..8e4d2c9 100644 --- a/include/configs/MPC8540ADS.h +++ b/include/configs/MPC8540ADS.h @@ -68,10 +68,14 @@

• The board, however, can run at 66MHz. In any event, this value
• must match the settings of some switches. Details can be found
• in the README.mpc85xxads.

• • XXX -- Can't we run at 66 MHz, anyway? PCI should drop to
• • 33MHz to accommodate, based on a PCI pin.
• • Note that PCI-X won't work at 33MHz.
  */

#ifndef CONFIG_SYS_CLK_FREQ -#define CONFIG_SYS_CLK_FREQ 66000000 +#define CONFIG_SYS_CLK_FREQ 33000000 #endif

-- 1.2.4

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</snip>

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