Alemao ha scritto:
Hi all,
Im trying to use a NAND flash (NAND512W3A, from ST) in MPC8360
localbus, with UPM.
My board is based on the mpc8360erdk. I also have a NOR flash
connected in the localbus.
But I have some doubts in how to put this information at the DTS file.
Im doing this way:
[EMAIL PROTECTED] {
.
.
.
};
[EMAIL PROTECTED] {
compatible = "fsl,mpc8360-localbus";
#address-cells = <2>;
#size-cells = <1>;
reg = <e0005000 d8>;
ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
1 0 60000000 4000000>; // nand
flash, 64 MB (512 Mb)
[EMAIL PROTECTED],0 {
compatible = "amd,s29glxxx", "cfi-flash";
reg = <0 0 40000>;
bank-width = <2>;
device-width = <1>;
};
[EMAIL PROTECTED],0 {
compatible = "stmicro,NAND512W3A", "fsl,upm-nand";
reg = <1 0 4000000>; //reg = <1 0 1>;
width = <1>;
upm = "A";
upm-addr-offset = <16>;
upm-cmd-offset = <8>;
gpios = <4 18>;
gpio-parent = <&qe_pio>;
wait-pattern;
wait-write;
};
};
Maybe it'd be better:
NOR: [EMAIL PROTECTED],0 {
compatible = "amd,s29glxxx", "cfi-flash";
reg = <0 0 40000>;
bank-width = <2>;
device-width = <1>;
};
NAND: [EMAIL PROTECTED],0 {
compatible = "stmicro,NAND512W3A", fsl,upm-nand";
reg = <1 0 4000000>; //reg = <1 0 1>;
width = <1>;
upm = "A";
upm-addr-offset = <16>;
upm-cmd-offset = <8>;
gpios = <4 18>;
In range information:
ranges = <0 0 ff800000 1000000 // nor flash, 16 MB
1 0 60000000 4000000>; // nand flash, 64 MB (512 Mb)
i dont know what ff800000 and 60000000 means,
They are the physical addresses. You have to write the addresses
according to your memory map.
i got those values from some posts in the mail-list. I also searched
the datasheet and didnt find anything about those values.
The size values, 1000000 and 4000000, im using the memory density.
Is this correct? Cause i read some posts that the nand size was very
small, like 32K, seems that its something like the block size of
nand.
Ok the last value is the size.
In reg information:
reg = <0 0 1000000>; // nor-flash
reg = <1 0 4000000>; // nand-flash
Dont know if its correct. The third argument i used the size,
but the second i dont know what value use.
Ok, right. The second value is simply an offset.
In other post by Anton, i saw something like these:
[EMAIL PROTECTED],0 {
flash {
...
};
};
Should i use it?
No I think it's not needed, however, follow the instruction of
booting-without-of.txt. In this guide you can find all the nodes you can
use.
I must confess, im really confuse about all this stuffs.
I read linux/Documentation/powerpc/booting-without-of.txt but didnt
clarify so much.
Cheers,
--
Alemao
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--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
[EMAIL PROTECTED]
+39 06 72582838
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