On Fri, Oct 19, 2007 at 08:23:19AM -0500, Kumar Gala wrote:
>
> On Oct 18, 2007, at 5:29 PM, Anton Vorontsov wrote:
>
>> On Thu, Oct 18, 2007 at 02:58:25PM -0500, Kumar Gala wrote:
>> [...]
>>>> +
>>>> + [EMAIL PROTECTED],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.
[Unrelated to the patch.
I've tried to erase first (hrcw) sector, everything passes fine, but
`md fe000000` still gives data back. Probably some hardware magic used
to prevent this? ;-)
=> erase fe000000 fe03ffff
.. done
Erased 2 sectors
=> md fe000000
fe000000: 42424242 42424242 05050505 05050505 BBBBBBBB........
fe000010: 00000000 00000000 83838383 83838383 ................
fe000020: a0a0a0a0 a0a0a0a0 60606060 60606060 ........````````
...
=> md fe020000
fe020000: ffffffff ffffffff ffffffff ffffffff ................
...]
>
>> 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?
Yes, apparently. :-)
>> 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.
Good idea.
>>
>> 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.
Here it is:
bootcmd=run ramargs;cp.b fff00000 400000 2000;bootm ff800000 ffa00000 400000
I.e.
0xFF800000 - kernel
0xFFA00000 - ramdisk
0xFFF00000 - dtb, one sector
Reworked patch (lbus+flash) follow, using this stock partitions map:
0x00000000-0x00020000 : "hrcw" <- 128 kB
0x01f80000-0x02000000 : "u-boot" <- 512 kB
0x00020000-0x01800000 : "rootfs" <- 24448 kB
0x01800000-0x01a00000 : "kernel" <- 2048 kB
0x01a00000-0x01f00000 : "ramdisk" <- 5120 kB
0x01f00000-0x01f20000 : "dtb" <- 128 kB
0x01f20000-0x01f80000 : "spare" <- 384 kB
I'm not sure about "ramdisk" partition though, maybe concatenate
kernel+ramdisk to use with initramfs kernels instead?
- - - -
From: Anton Vorontsov <[EMAIL PROTECTED]>
Subject: [PATCH] [POWERPC] MPC8568E-MDS: create localbus node, add flash support
This patch:
- creates localbus node;
- moves bcsr into it;
- creates flash node (1 32MB Spansion x16 CFI) and its partitions;
- adds localbus to the probe path.
Signed-off-by: Anton Vorontsov <[EMAIL PROTECTED]>
---
arch/powerpc/boot/dts/mpc8568mds.dts | 61 +++++++++++++++++++++++++++-
arch/powerpc/platforms/85xx/mpc85xx_mds.c | 1 +
2 files changed, 59 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/boot/dts/mpc8568mds.dts
b/arch/powerpc/boot/dts/mpc8568mds.dts
index 5439437..8ddeaf8 100644
--- a/arch/powerpc/boot/dts/mpc8568mds.dts
+++ b/arch/powerpc/boot/dts/mpc8568mds.dts
@@ -42,9 +42,64 @@
reg = <00000000 10000000>;
};
- [EMAIL PROTECTED] {
- device_type = "board-control";
- reg = <f8000000 8000>;
+ [EMAIL PROTECTED] {
+ #address-cells = <2>;
+ #size-cells = <1>;
+ compatible = "fsl,mpc8568-localbus";
+ reg = <e0005000 d8>;
+ ranges = <1 0 f8000000 0008000
+ 0 0 fe000000 2000000>;
+
+ [EMAIL PROTECTED],0 {
+ device_type = "board-control";
+ reg = <1 0 8000>;
+ };
+
+ [EMAIL PROTECTED],0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "Spansion,S29GL256N11TFIV2O", "cfi-flash";
+ reg = <0 0 2000000>;
+ bank-width = <2>;
+ device-width = <1>;
+
+ [EMAIL PROTECTED] {
+ label = "hrcw";
+ reg = <0 20000>;
+ read-only;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "u-boot";
+ reg = <1f80000 80000>;
+ read-only;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "rootfs";
+ reg = <20000 17e0000>;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "kernel";
+ reg = <1800000 200000>;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "ramdisk";
+ reg = <1a00000 500000>;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "dtb";
+ reg = <1f00000 20000>;
+ };
+
+ [EMAIL PROTECTED] {
+ label = "spare";
+ reg = <1f20000 60000>;
+ };
+ };
};
[EMAIL PROTECTED] {
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index 61b3eed..45ffca4 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -139,6 +139,7 @@ static struct of_device_id mpc85xx_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .type = "qe", },
+ { .compatible = "fsl,mpc8568-localbus", },
{},
};
--
1.5.0.6
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