Messages in this thread | | | From | Sebastian Hesselbarth <> | Subject | Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash partition | Date | Sat, 28 Nov 2015 18:38:15 +0100 |
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On 28.11.2015 17:52, Andrew Lunn wrote: > On Sat, Nov 28, 2015 at 12:14:05PM +0100, Sebastian Hesselbarth wrote: >> Current NAND node has an additional flash partition for the whole >> flash overlapping with real partitions. Remove this partition as >> the whole flash is already represented by the NAND device itself. > > If i remember correctly, we discussed this when the contribution was > made. I think the stock firmware might use this for applying updates. > Maybe Benoit can comment?
Yes, please.
> If so, removing this will break compatibility with stock firmware. Do > we want to do that? There are a few other mvebu dts files with a > partition spanning the whole flash. Should we remove them as well?
Well, there is already a mtd device that spans the whole flash so what is the purpose of another "partition" that isn't a part but all of the device? Actually, I doubt that a FW update will wipe the flash as a whole, i.e. including boot loader, boot env, user config.
Anyway, let's see if Benoit can shed some light on this.
FWIW, neither single partitions nor a combined partitions node should be a direct sub-node of the _controller_ but a NAND _device_ node instead. Luckily, multi-device systems are not that common, so I guess we wait with it until such a system pops up for testing.
Sebastian
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