Hi Chris,
On 24.08.2016 02:24, Chris Packham wrote:
On Tue, Aug 23, 2016 at 10:54 PM, Chris Packham <judge.pack...@gmail.com> wrote:
On Tue, Aug 23, 2016 at 6:57 PM, Stefan Roese <s...@denx.de> wrote:
Hi Chris,
On 22.08.2016 02:38, Chris Packham wrote:
From: Chris Packham <chris.pack...@alliedtelesis.co.nz>
Add pin control settings for the NAND flash interface. This interface
is multiplexed with the device bus interface to the function is "dev"
not "nand" as one might expect.
Signed-off-by: Chris Packham <chris.pack...@alliedtelesis.co.nz>
Cc: Luka Perkov <luka.per...@sartura.hr>
Cc: Dirk Eibach <eib...@gdsys.de>
---
I don't think this is strictly necessary. A quick scan of boards that
use this family of processor all seem to set their MPP configurations
manually.
Correct. Unfortunately we don't have a pin-ctrl driver for AXP / A38x
in U-Boot yet. Such a driver would be very welcome though. ;)
Another issue is that technically on the Armada-385 there are 4 possible
CE pins. The board I'm looking at happens to use CE#0 (mpp25) but mpp26,
mpp27 and mpp6 are all potentially available. I guess if any boards
actually use them they can add them to their pin specification. At the
very least such boards would need to update the num-cs property anyway.
How is this handled in the kernel?
I haven't seen anything in the kernel yet that uses these chip selects.
I would very much like to see
these changes in the dts in sync with the kernel as much as
possible. Does the kernel also use "dev" instead of "nand" here?
Yes I based this on
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/armada-39x.dtsi
I haven't got round to porting the kernel to my board so I imagine a
similar change will be required to armada-38x.dtsi in the kernel.
I've sent a kernel patch for the armada-38x[1] so perhaps we should
just drop this one and sync up if/when the kernel patch is accepted.
[1] -
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/451027.html
Yes, this is better. I'll drop the patch for now and will make sure
that we sync with the kernel at some later time. Perhaps we even
have a pinctrl driver for A38x at that time... ;)
Thanks,
Stefan
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