< + [EMAIL PROTECTED] {
< + compatible = "cfi-flash";
< + reg = <00000000 02000000>;
< + bank-width = <4>;
< + device-width = <2>;
< + #size-cells = <1>;
< + #address-cells = <1>;
< + [EMAIL PROTECTED] {
< + label = "firmware";
< + reg = <0 a0000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "dtb";
< + reg = <a0000 20000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "kernel";
< + reg = <c0000 240000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "initrd";
< + reg = <300000 200000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "small-fs";
< + reg = <500000 400000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "misc";
< + reg = <900000 800000>;
< + };
< + [EMAIL PROTECTED] {
< + label = "big-fs";
< + reg = <1100000 f00000>;
< + };
< + };
< + };
This MTD layout only works on boards with 32 MiB (or 64 MiB) flash
memory. On TQM5200 boards with smaller Flashes (16 MiB, 8 MiB and 4 MiB)
the MTD partition borders do not match with the physikal memory borders.
On a board with 16 MiB FLASH for example the "big-fs" _and_ the "misc"
partition could not be used. "big-fs", because the memory is too small
(which is OK) and "misc", because it overlaps 1 MiB over the physikal
flash border. So only the first 9 MiB of the flash could be used in Linux.
The remaining 7 MiB couldn't be accessed.
I would propose a Flash layout, where the (filesystem) partitions end
on powers of two, to match the physical flash boarders:
[EMAIL PROTECTED] {
label = "firmware";
reg = <0 a0000>;
};
[EMAIL PROTECTED] {
label = "dtb";
reg = <a0000 20000>;
};
[EMAIL PROTECTED] {
label = "kernel";
reg = <c0000 180000>;
};
[EMAIL PROTECTED] {
label = "initrd";
reg = <240000 1c0000>;
};
[EMAIL PROTECTED] {
label = "small-fs";
reg = <400000 400000>;
};
[EMAIL PROTECTED] {
label = "misc";
reg = <800000 800000>;
};
[EMAIL PROTECTED] {
label = "big-fs";
reg = <1000000 1000000>;
};
};
};
Best Regards,
Martin Krause
--
View this message in context:
http://www.nabble.com/-PATCH-00-11---POWERPC--Add-TQM5200-CM5200-Motion-PRO-board-support-tf4680980.html#a13403420
Sent from the linuxppc-dev mailing list archive at Nabble.com.
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
