[OpenWrt-Devel] [PATCH 3/9] kernel: Allow ubi autoattach to run on NOR flash

[Imre Kaloz]

On Thu, 22 Jan 2015 11:33:14 +0100, Maxime Ripard  
<maxime.ripard at free-electrons.com> wrote:

> Hi,
>
> On Wed, Jan 14, 2015 at 01:37:37PM +0100, Maxime Ripard wrote:
>> On Wed, Jan 14, 2015 at 12:43:25PM +0100, Rafał Miłecki wrote:
>> > On 13 January 2015 at 16:56, Maxime Ripard
>> > <maxime.ripard at free-electrons.com> wrote:
>> > > Some devices out there only have a NOR flash to store the rootfs on.
>> > >
>> > > While using UBI is arguable on this kind of NAND, this is something  
>> that should
>> > > be supported.
>> >
>> > So why use UBI at all? Doesn't it make more sense to stick to the
>> > JFFS2? You should be even able to easily create 2 different image
>> > types (one for NOR, one for NAND) in one target (see bcm53xx).
>>
>> The Openblocks AX3 has a fairly large NOR (128MB) which would make
>> JFFS2 a rather poor choice, and the UBI overhead wouldn't be that bad.
>
> Is that case good enough for you?

Sure, but please implement UBI on NOR as a generic solution.

>> The A385-RD board has a much smaller SPI-NOR (16MB) though, so we
>> could use jffs2 there, but I wasn't seeing much point at creating a
>> whole new layout just for a single board.
>
> I'll switch this one to JFFS2 and the MTDSPLIT framework. Are you
> satisfied with the NAND support? Just to know if I can continue to
> model the NOR stuff on that.

As I've written in the other mail, I'm mostly happy with it, but please  
make sure you don't hardcode available profiles but parse them.


Thanks,

Imre
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel