Can not get PATA to work for Compact Flash with 2.6.28 kernel

[Steven A. Falco]

Lixin Yao wrote:
> 
> 
> I use a San Disk compact flash (CF) card on a board with MPC8248
> processor. The CF is connected to data and address bus of the processor
> and operates in TRUE IDE mode. The registers are memory mapped. I can
> read the file system on the CF in u-boot (1.3.4). U-boot can identify
> the CF and mount file system correctly.
> 
> The hardware is known good hardware.
> 
> I use 2.6.28 kernel and configured support for PATA for the CF.

The second register set does not start at register 0.  It starts
at register 6.  We are using 1 chip select from the processor,
and generate two chip selects to the CF that are 0x80 apart (on
a sequoia board).

So here is what I am using on the modified sequoia board.  Note
the 0x00000098 - you might think it should be 0x00000080 as per
the discussion above, but because the second register set starts
at 6, you have to build that into the address.  

pata at 1,0 {
compatible = "harris,hydra_temp-pata", "ata-generic";
bank-width = <2>;
reg = <0x00000001 0x00000000 0x00000020 0x00000001 0x00000098 0x00000004>;
reg-shift = <2>;
pio-mode = <6>;
interrupt-parent = <&UIC0>;
interrupts = <0x1b 0x4>;
};

	Steve