linux-kernel - Re: [RFC PATCH] memory: renesas-rpc-if: Correct QSPI data transfer in Manual mode

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Date:   Tue, 8 Mar 2022 09:29:55 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Duc Nguyen <duc.nguyen.ub@...esas.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>,
        Andrew Gabbasov <andrew_gabbasov@...tor.com>
Subject: Re: [RFC PATCH] memory: renesas-rpc-if: Correct QSPI data transfer in
 Manual mode

Hi Wolfram,

On Tue, Mar 8, 2022 at 9:21 AM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
> > Wolfram: which platform did you use for QSPI testing, so I don't
> > break that again?
>
> I did my refactoring using an Eagle board and once this worked, I
> enabled QSPI on Falcon. All remotely. Condor was another candidate but
> it was broken in the lab at that time.

OK, thanks!

> >     Without that (e.g. old H3 R-Car ES1.0), it crashes with an
>
> Frankly, I wouldn't trust ES1.0 as a reliable source for QSPI. Could you
> start with the newest Gen3 board you have and then go to previous ones?

This is not QSPI, but HF.

Building a new firmware for R-Car H3 ES1.0 with HF unlocked will be
complicated, as it is not supported by upstream TF-A.

Note that HF also fails to probe on R-Car M3-W and M3-N ES1.0.
Haven't tried it on R-Car E3 yet.  All those have a (not so new) TF-A,
but built with RCAR_RPC_HYPERFLASH_LOCKED=0.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds