Re: [PATCH v3 2/2] [POWERPC] MPC8568E-MDS: add support for flash

On Oct 18, 2007, at 5:29 PM, Anton Vorontsov wrote:

On Thu, Oct 18, 2007 at 02:58:25PM -0500, Kumar Gala wrote:
[...]

quoted

quoted

+
+		flash@0,0 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "Spansion,S29GL256N11TFIV2O", "cfi-flash";
+			reg = <0 0 2000000>;
+			bank-width = <2>;
+			device-width = <1>;
+

Are you basing the partition map on something or making it up?
Clearly hrcw & u-boot are at fixed offsets, wondering about kernel &
rootfs?

I'm making it up. From the brief look at the u-boot* git sources,
there is no `flashboot` yet, thus I'm free to make this up...

I've partitioned this flash based on these thoughts:

1. HRCW - whole sector, to not wear out it, plus it's impossible to
   create just 64 bytes partition;

this makes sense.

2. Kernel - 2MB, should be enough for bootup kernels?

seems reasonable.

3. Rootfs - the rest up to...

do we need a small section for the device tree?

4. U-Boot at the end.

can we reorder partitions?  not sure if there is any value in having  
the things we know will always be there like hrcw & u-boot at fixed  
mtd0, mtd1, etc.

I'm not saying that it's best map ever, I'm open to suggestions. ;-)

* Unfortunately I didn't look at the stock Freescale u-boot, maybe
  there was flashboot, most probably.. I'll find the CD to look this
  up.

Yeah I have no idea what we ship w/regards to the BSPs.

- k