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Thu, 30 Jun 2022 09:57:20 -0700 (PDT) Received: (nullmailer pid 2895373 invoked by uid 1000); Thu, 30 Jun 2022 16:57:17 -0000 Date: Thu, 30 Jun 2022 10:57:17 -0600 From: Rob Herring To: Conor Dooley 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220629184343.3438856-5-mail@conchuod.ie> X-Mailman-Approved-At: Mon, 04 Jul 2022 13:23:02 +0200 Cc: Niklas Cassel , alsa-devel@alsa-project.org, David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Conor Dooley , Thierry Reding , Krzysztof Kozlowski , linux-riscv@lists.infradead.org, Sam Ravnborg , Masahiro Yamada , Daniel Lezcano , Jose Abreu , Geert Uytterhoeven , Eugeniy Paltsev , devicetree@vger.kernel.org, Albert Ou , Mark Brown , Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Dillon Min , Liam Girdwood , Serge Semin , linux-spi@vger.kernel.org, Vinod Koul , Rob Herring , Palmer Dabbelt , Daniel Vetter , dmaengine@vger.kernel.org, Damien Le Moal X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Wed, 29 Jun 2022 19:43:33 +0100, Conor Dooley wrote: > From: Conor Dooley > > 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 > --- > Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 6 ------ > 1 file changed, 6 deletions(-) > Reviewed-by: Rob Herring