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([2600:8803:e7e4:1d00:677:c1a1:65b9:2b0c]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7439203b5ffsm348082a34.25.2025.08.15.08.49.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Aug 2025 08:49:41 -0700 (PDT) Message-ID: Date: Fri, 15 Aug 2025 10:49:40 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/9] dt-bindings: spi: Add spi-buses property To: Sean Anderson , Mark Brown , Michal Simek , linux-spi@vger.kernel.org Cc: Jinjie Ruan , Miquel Raynal , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Amit Kumar Mahapatra References: <20250616220054.3968946-1-sean.anderson@linux.dev> <20250616220054.3968946-2-sean.anderson@linux.dev> Content-Language: en-US From: David Lechner In-Reply-To: <20250616220054.3968946-2-sean.anderson@linux.dev> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/16/25 5:00 PM, Sean Anderson wrote: > From: David Lechner > > Add a spi-buses property to the spi-peripheral-props binding to allow > specifying the SPI bus or buses that a peripheral is connected to in > cases where the SPI controller has more than one physical SPI bus. > > Signed-off-by: David Lechner > Signed-off-by: Sean Anderson > --- > > Changes in v2: > - New > > .../devicetree/bindings/spi/spi-peripheral-props.yaml | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml > index 8fc17e16efb2..cfdb55071a08 100644 > --- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml > +++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml > @@ -89,6 +89,16 @@ properties: > description: > Delay, in microseconds, after a write transfer. > > + spi-buses: > + description: > + Array of bus numbers that describes which SPI buses of the controller are > + connected to the peripheral. This only applies to peripherals connected > + to specialized SPI controllers that have multiple SPI buses on a single > + controller. > + $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 Finally have some hardware to test this series with using 2 or 4 buses. I found that we also need an absolute max here to make the bindings checker happy. 8 seems sensible since I haven't seen more than that on a peripheral. We can always increase it if we find hardware that requires more buses. maxItems: 8 > + default: [0] > + > stacked-memories: > description: Several SPI memories can be wired in stacked mode. > This basically means that either a device features several chip