MPC8280 bus_clk
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
Quoted 5 lines
From: "Rune Torgersen" <[email protected]>
To: "HU Chunlin" <[email protected]>
Subject: RE: [U-Boot-Users] MPC8280bus_clk
Date: Mon, 22 Mar 2004 10:40:31 -0600
Quoted 7 lines
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)
Quoted 3 lines
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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