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Date:   Thu, 30 Jun 2022 10:57:17 -0600
From:   Rob Herring <robh@kernel.org>
To:     Conor Dooley <mail@conchuod.ie>
Cc:     Daniel Lezcano <daniel.lezcano@linaro.org>,
        Palmer Dabbelt <palmer@dabbelt.com>, dmaengine@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
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        alsa-devel@alsa-project.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-kernel@vger.kernel.org, Jose Abreu <joabreu@synopsys.com>,
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        Masahiro Yamada <masahiroy@kernel.org>,
        Sam Ravnborg <sam@ravnborg.org>,
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        Thierry Reding <thierry.reding@gmail.com>,
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        Paul Walmsley <paul.walmsley@sifive.com>,
        Mark Brown <broonie@kernel.org>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Conor Dooley <conor.dooley@microchip.com>,
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        Rob Herring <robh+dt@kernel.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
        linux-spi@vger.kernel.org
Subject: Re: [PATCH v3 04/15] spi: dt-bindings: dw-apb-ssi: update
 spi-{r,t}x-bus-width
Message-ID: <20220630165717.GA2895317-robh@kernel.org>
References: <20220629184343.3438856-1-mail@conchuod.ie>
 <20220629184343.3438856-5-mail@conchuod.ie>
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On Wed, 29 Jun 2022 19:43:33 +0100, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Most users of dw-apb-ssi use spi-{r,t}x-bus-width of 1, however the
> Canaan k210 is wired up for a width of 4.
> Quoting Serge:
> The modern DW APB SSI controllers of v.4.* and newer also support the
> enhanced SPI Modes too (Dual, Quad and Octal). Since the IP-core
> version is auto-detected at run-time there is no way to create a
> DT-schema correctly constraining the Rx/Tx SPI bus widths.
> /endquote
> 
> As such, drop the restriction on only supporting a bus width of 1.
> 
> Link: https://lore.kernel.org/all/20220620205654.g7fyipwytbww5757@mobilestation/
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 6 ------
>  1 file changed, 6 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>