loading NOR flash from DT

Sergei Shtylyov sshtylyov at ru.mvista.com
Thu Oct 18 06:23:23 EST 2007

Sebastian Siewior wrote:

>>>I have here a MPC8544 DS board with NOR flash on it and Kumar's git
>>>tree. I'm trying to detect this flash with the physmap_of module. I
>>>added a nor_flash block (I used sequoia.dts as an example) into my
>>>device tree on the same level as soc8544 or memory (or between them).
>>>After modprobing physmap_of nothing happend. Then I tried to make a tree
>>>with plb -> opb -> ebc and finally nor_flash but still nothing changed.
>>>Is there a user space dependency or did I just edit my device tree the
>>>wrong way? Any hints are welcome :)
>>Post your device tree please.  I don't recall MPC8544 even having PLB,
>>OPB, or EBC busses, so they likely aren't getting probed.

> 	flash at fc000000 {
> 			compatible = "amd,s29gl512n", "cfi-flash";
> 			reg = <fc000000 4000000>;
> 			bank-width = <2>;
> 			#address-cells = <1>;
> 			#size-cells = <1>;
> 			fs at 0 {
> 					label = "fs";
> 					reg = <0 f80000>;
> 			};
> 			firmware at f80000 {
> 					label ="firmware";
> 					reg = <f80000 80000>;
> 					read-only;
> 			};

    This looks good, so the problem is it doesn't get registered by the 
platform code as I've said.

WBR, Sergei

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