linux-kernel - Re: Question regarding Linux-6.3.5 and Sunxi A20 NAND/NFC support

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Date:   Thu, 17 Aug 2023 22:21:35 +0100
From:   Fawad Lateef <fawadlateef@...il.com>
To:     John Watts <contact@...kia.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux sunXi <linux-sunxi@...ts.linux.dev>,
        kernelnewbies <kernelnewbies@...nelnewbies.org>,
        boris.brezillon@...labora.com
Subject: Re: Question regarding Linux-6.3.5 and Sunxi A20 NAND/NFC support

On Wed, 16 Aug 2023 at 01:20, John Watts <contact@...kia.org> wrote:
>
> On Tue, Aug 15, 2023 at 11:01:02PM +0100, Fawad Lateef wrote:
> > Hi everyone,
> >
> > Can someone guide me? I am not sure what I am missing here.
> >
> > I am trying to debug the code but I assume that the SUNXI NAND driver
> > is supposed to be working and that something is missing from my
> > changes and additions to the dts/dtsi for A20 SOM.
> >
> > Thanks in advance
>
> Hi there Fawad,
>
> I've hit this problem before and it's usually been because the pins are being
> used by another peripheral already
>
> Could you post the kernel log? It might have some notes on this.
>
> John.

Hi John,

Thanks for your help. I found the reason for my issue. I defined the
pinctrl information under the "soc" next to "nfc" entry in
sunxi-a20.dtsi which was messing it up.

I moved them inside the "pio" dtsi block and NAND is detected now.
Though almost all blocks are reported as bad-blocks.  I am thinking
that it's happening as I don't have partition information defined in
DTS. Do you think that this is the reason for bad-blocks reporting?

Regards,

Fawad Lateef