linux-kernel - Re: [PATCH v8 2/2] spi: cadence-quadpsi: Add support for the Cadence QSPI controller

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Date:   Wed, 29 Jan 2020 13:01:37 +0100
From:   Simon Goldschmidt <simon.k.r.goldschmidt@...il.com>
To:     "Ramuthevar, Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Tien-Fong Chee <tien.fong.chee@...el.com>,
        Marek Vasut <marex@...x.de>
Cc:     Mark Brown <broonie@...nel.org>, Vignesh R <vigneshr@...com>,
        linux-spi@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>, dan.carpenter@...cle.com,
        cheol.yong.kim@...el.com, qi-ming.wu@...el.com
Subject: Re: [PATCH v8 2/2] spi: cadence-quadpsi: Add support for the Cadence
 QSPI controller

+ some people possibly interested in this for the Altera platforms (see below)

Hi all,

This is about moving the cadence qspi driver (which is used on TI, Altera FPGAs
and a new Intel SoC) to spi-mem.Vadivel asked me to include some Altera people
in the loop (see below), as this is the only platform currently untested,
I think.

Right now, I'm not in the position to test this myself as we're currently stuck
on an older RT kernel, so I cannot test with HEAD.

Feel free to involve other Intel/Altera if you're interested in that peripheral
not being broke for socfpga in one of the next releases :-)

On Wed, Jan 29, 2020 at 10:18 AM Ramuthevar, Vadivel MuruganX
<vadivel.muruganx.ramuthevar@...ux.intel.com> wrote:
>
> Hi,
>
>   Thank you for the query and confirmation.
>
> On 29/1/2020 4:31 PM, Simon Goldschmidt wrote:
>
> On Wed, Jan 29, 2020 at 8:25 AM Ramuthevar,Vadivel MuruganX
> <vadivel.muruganx.ramuthevar@...ux.intel.com> wrote:
>
> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>
> Add support for the Cadence QSPI controller. This controller is
> present in the Intel Lightning Mountain(LGM) SoCs, Altera and TI SoCs.
> This driver has been tested on the Intel LGM SoCs.
>
> So it has been tested on LGM and Vignesh gave his ok for TI. Is there anyone
> in the loop by now checking that this is valid for the 3rd platform using this
> (Altera)?
>
> Or am I wrong in thinking that this driver is meant to replace
> drivers/mtd/spi-nor/cadence-quadspi.c used on that platform?
>
> Absolutely , You are right, this driver is meant to replace to drivers/mtd/spi-nor/cadence-quadspi.c
> for Intel, TI and Altera SoC's using Cadence-QSPI IP.
>
> Meanwhile we have adapted to spi-mem framework (to support spi-nor/nand)and also didn't change the existing
> functionalities of spi-nor flash operations like hw_init/read/write/erase in drivers/mtd/spi-nor/cadence-quadspi.c,
> so it works fine (might be in Altera as well).
>
> Already I checked that Graham Moore <grmoore@...nsource.altera.com> who has submitted the existing driver patches to upstream,
> His mail-id is bouncing back, then I decided that you are the right person to ask, could you please add them in loop if you know the team
> (socfpga platform engineers).

OK, done that. I mainly know them from U-Boot development, so I'm not sure
who's responsible for the Linux drivers...

Regards,
Simon

>
> Regards
> Vadivel
>
> Regards,
> Simon
>