[U-Boot] [PATCH 1/4] ppc4xx: Add function to check and dynamically change PCI sync clock

[Stefan Roese <sr@denx.de>]

On Monday 19 October 2009 16:16:02 Stefan Roese wrote:
> PPC440EP(x)/PPC440GR(x):
> In asynchronous PCI mode, the synchronous PCI clock must meet
> certain requirements. The following equation describes the
> relationship that must be maintained between the asynchronous PCI
> clock and synchronous PCI clock. Select an appropriate PCI:PLB
> ratio to maintain the relationship:
> 
> AsyncPCIClk - 1MHz <= SyncPCIclock <= (2 * AsyncPCIClk) - 1MHz
> 
> This patch now adds a function to check and reconfigure the sync
> PCI clock to meet this requirement. This is in preparation for
> some AMCC boards (Sequoia/Rainier and Yosemite/Yellowstone) using this
> function to not violate the PCI clocking rules.

Patch series (1...4) applied to u-boot-ppc4xx/master. Thanks.

Cheers,
Stefan

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