From: Mark Brown <broonie@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Magnus Damm <magnus.damm@gmail.com>,
linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Chris Paterson <Chris.Paterson2@renesas.com>,
Biju Das <biju.das@bp.renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH 1/2] spi: renesas,rzv2m-csi: Add SPI Slave related properties
Date: Wed, 27 Sep 2023 11:00:12 +0200 [thread overview]
Message-ID: <ZRPvHJXbuZ9Db2Go@finisterre.sirena.org.uk> (raw)
In-Reply-To: <CAMuHMdUibHxPBCLbeWdNrEk_szm+o4cOcskEMZAqUufNTzQKMQ@mail.gmail.com>
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On Wed, Sep 27, 2023 at 09:59:05AM +0200, Geert Uytterhoeven wrote:
> On Tue, Sep 26, 2023 at 11:08 PM Fabrizio Castro
> > + type: boolean
> > + description:
> > + Use CSI Slave Selection (SS) pin to enable transmission and reception when
> > + in slave mode.
> Can't this be done in a more generic way? I had expected that the
> existing SPI_NO_CS flag can be set using a property in the "slave" subnode,
> but apparently there is no "spi-no-cs" property defined yet.
The description is clearly saying there is a chip select, _NO_CS seems
entirely inappropriate. It's not specified in the device tree because
when there's no chip select for a device it's a fundamental property of
how the device is controlled and we don't need any information beyond
the compatible.
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next prev parent reply other threads:[~2023-09-27 9:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-26 21:08 [PATCH 0/2] Add RZ/V2M CSI slave support Fabrizio Castro
2023-09-26 21:08 ` [PATCH 1/2] spi: renesas,rzv2m-csi: Add SPI Slave related properties Fabrizio Castro
2023-09-27 7:59 ` Geert Uytterhoeven
2023-09-27 9:00 ` Mark Brown [this message]
2023-09-27 9:10 ` Geert Uytterhoeven
2023-09-27 9:21 ` Mark Brown
2023-09-27 9:44 ` Geert Uytterhoeven
2023-09-27 10:05 ` Mark Brown
2023-09-27 10:18 ` Fabrizio Castro
2023-09-27 10:22 ` Mark Brown
2023-09-27 9:43 ` Fabrizio Castro
2023-09-27 9:36 ` Fabrizio Castro
2023-09-27 8:56 ` Mark Brown
2023-09-27 9:40 ` Fabrizio Castro
2023-09-26 21:08 ` [PATCH 2/2] spi: rzv2m-csi: Add Slave mode support Fabrizio Castro
2023-09-27 9:02 ` Mark Brown
2023-09-27 9:12 ` Geert Uytterhoeven
2023-09-27 9:15 ` Mark Brown
2023-09-27 9:51 ` Geert Uytterhoeven
2023-09-27 10:05 ` Fabrizio Castro
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