Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 10 Aug 2022 14:40:35 +0100
From:   Mark Brown <broonie@kernel.org>
To:     Patrice CHOTARD <patrice.chotard@foss.st.com>
Cc:     Alexandre Torgue <alexandre.torgue@foss.st.com>,
        linux-spi@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        christophe.kerello@foss.st.com
Subject: Re: [PATCH v2 1/2] spi: stm32_qspi: Add transfer_one_message() spi
 callback
Message-ID: <YvO1U7VB7WQv0oKR@sirena.org.uk>
References: <20220810093215.794977-1-patrice.chotard@foss.st.com>
 <20220810093215.794977-2-patrice.chotard@foss.st.com>
 <YvOtZtrRHd4AT+j+@sirena.org.uk>
 <d41e3814-3fab-18a3-7218-d5c28eaecff8@foss.st.com>
 <YvOxOg0vXSGrZLfP@sirena.org.uk>
 <38200a6f-fdc1-fa94-7bc6-91ca528235ed@foss.st.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha512;
        protocol="application/pgp-signature"; boundary="21y0RXUsptdj3o80"
Content-Disposition: inline
In-Reply-To: <38200a6f-fdc1-fa94-7bc6-91ca528235ed@foss.st.com>
Precedence: bulk


--21y0RXUsptdj3o80
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Wed, Aug 10, 2022 at 03:31:59PM +0200, Patrice CHOTARD wrote:
> On 8/10/22 15:23, Mark Brown wrote:
> > On Wed, Aug 10, 2022 at 03:15:08PM +0200, Patrice CHOTARD wrote:

> > Yes.  Though I'm not clear if the bindings actually want to enforce it
> > there, it's a device level property not a controller level one so it
> > might not be something where controller support gets validated.

> Ah yes, i see, parallel-memories should not be used in our qspi controller node.
> So i can't reuse parallel-memories for my purpose.

> So i need to add a new proprietary property at controller level as done in the v1 ?

Can't the controller figure this out by looking at the properties of the
connected devices?  You'd need to just return an error if we ever
triggered transfer_one_message() on a device that can't support the
operation.

--21y0RXUsptdj3o80
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmLztVIACgkQJNaLcl1U
h9B5Nwf+LqqU0x5SAVtWEAkovEh2F95cA6yjgmiKu5b4XJoJIIkHIi8Hym6frbxI
/Dr2p4xqVytxvWo3HeH1mc/utjZ2nogSlwgODbdIsIW9pCVdZqdIckw/Bxc7u4nF
/sqKHA8I8UwKqgFNeEAJtLRSOvm55KPe8UrjjFXgxB3yEFLrm0jgS9ULBXNpv9Mf
W7+hbsbmtgOhkHeh9qpWExwBx/y//jLxQ8h/D0UT9F2A2TgiXMaKUeX8du0Z+PLr
HD2BB2+vm3Bq/YprTBNGp/zyFdg/ESuWfhlmG041cW0CxPKFTGcr9Oz2qEtV8TYY
fhc72oFs7Ylf8lrTOVN1FuQ+cH6GPg==
=f5sp
-----END PGP SIGNATURE-----

--21y0RXUsptdj3o80--