Thank you for the quick reply.

So for at least 8266 CPU running PCI agent mode, the CONFIG_8260_CLKIN definition must be set to 2 x PCI_CLK, and the bus_clk must be calculated as gd->bus_clk = gd->vco_out / (busdf + 1)?

If so, I think there must be a patch for it.

Regards, HU Chunlin

From: "Rune Torgersen" runet@innovsys.com To: "HU Chunlin" hucl606@hotmail.com Subject: RE: [U-Boot-Users] MPC8280 bus_clk Date: Mon, 22 Mar 2004 10:40:31 -0600

That is a problem for at least eht 8266 CPU when set in PCI agent mode, because the clockiin is then 2x the PCI clock, and is not the bus clock (which is multiplied up from that)

...

I got some information from the Technical Support Engineering Team of Motorola that the statement BUS_CLK == CLKIN applies to local bus mode only.

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