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Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash partition

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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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[PATCH 0/4] ARM: dt: mvebu: ix4-300d: NAND cleanup and ECC Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 12:20 +0100
  [PATCH 4/4] ARM: dt: mvebu: ix4-300d: Add ECC properties to NAND flash Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 12:20 +0100
    Re: [PATCH 4/4] ARM: dt: mvebu: ix4-300d: Add ECC properties to NAND  flash Andrew Lunn <andrew@lunn.ch> - 2015-11-28 18:10 +0100
    Re: [PATCH 4/4] ARM: dt: mvebu: ix4-300d: Add ECC properties to  NAND flash Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-11-29 15:40 +0100
      Re: [PATCH 4/4] ARM: dt: mvebu: ix4-300d: Add ECC properties to NAND  flash Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-30 09:40 +0100
        Re: [PATCH 4/4] ARM: dt: mvebu: ix4-300d: Add ECC properties to NAND flash Gregory CLEMENT <gregory.clement@free-electrons.com> - 2015-11-30 15:30 +0100
  [PATCH 3/4] ARM: dt: mvebu: ix4-300d: Cleanup NAND partition ranges Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 12:20 +0100
    Re: [PATCH 3/4] ARM: dt: mvebu: ix4-300d: Cleanup NAND partition  ranges Andrew Lunn <andrew@lunn.ch> - 2015-11-28 18:10 +0100
      Re: [PATCH 3/4] ARM: dt: mvebu: ix4-300d: Cleanup NAND partition ranges Gregory CLEMENT <gregory.clement@free-electrons.com> - 2015-11-30 15:30 +0100
  [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash partition Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 12:20 +0100
    Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash  partition Andrew Lunn <andrew@lunn.ch> - 2015-11-28 18:00 +0100
      Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash  partition Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 18:40 +0100
        Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash partition Benoit Masson <benoitm@perenite.com> - 2015-11-28 21:40 +0100
    Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash  partition Andrew Lunn <andrew@lunn.ch> - 2015-11-28 22:20 +0100
      Re: [PATCH 1/4] ARM: dt: mvebu: ix4-300d: remove whole flash partition Gregory CLEMENT <gregory.clement@free-electrons.com> - 2015-11-30 15:20 +0100
  [PATCH 2/4] ARM: dt: mvebu: ix4-300d: move partitions to partition sub-node Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 12:20 +0100
    Re: [PATCH 2/4] ARM: dt: mvebu: ix4-300d: move partitions to  partition sub-node Andrew Lunn <andrew@lunn.ch> - 2015-11-28 18:10 +0100
      Re: [PATCH 2/4] ARM: dt: mvebu: ix4-300d: move partitions to  partition sub-node Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - 2015-11-28 18:40 +0100
    Re: [PATCH 2/4] ARM: dt: mvebu: ix4-300d: move partitions to partition sub-node Gregory CLEMENT <gregory.clement@free-electrons.com> - 2015-11-30 15:20 +0100

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