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[86.49.244.181]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-496b499cc49sm57113005e9.9.2026.07.25.01.12.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Jul 2026 01:12:10 -0700 (PDT) Date: Sat, 25 Jul 2026 10:12:08 +0200 From: Joshua Crofts To: Jonathan Cameron Cc: David Lechner , Nuno =?UTF-8?B?U8Oh?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] dt-bindings: iio: dac: add support for mcp47a1 Message-ID: <20260725101208.06f60b70@systembl0wer> In-Reply-To: <20260725000439.5ad6f4d1@jic23-huawei> References: <20260721-mcp47a1-add-support-v1-0-da045a2567e3@gmail.com> <20260721-mcp47a1-add-support-v1-1-da045a2567e3@gmail.com> <20260725000439.5ad6f4d1@jic23-huawei> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sat, 25 Jul 2026 00:04:51 +0100 Jonathan Cameron wrote: > On Tue, 21 Jul 2026 20:24:38 +0200 > Joshua Crofts wrote: > > > The Microchip MCP47A1 is a 6-bit volatile Digital-to-Analog converted > > which communicates via I2C. > > > > Signed-off-by: Joshua Crofts > > --- > > .../bindings/iio/dac/microchip,mcp47a1.yaml | 56 ++++++++++++++++++++++ > > MAINTAINERS | 6 +++ > > 2 files changed, 62 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp47a1.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp47a1.yaml > > new file mode 100644 > > index 000000000000..3322fca03b3a > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp47a1.yaml > > > + > > +examples: > > + - | > > + i2c { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + dac@2e { > > + compatible = "microchip,mcp47a1"; > > + reg = <0x2e>; > > + vref-supply = <&vref_regulator>; > > + vdd-supply = <&vdd_regulator>; > > + }; > > + > > + dac@3e { > > + compatible = "microchip,mcp47a1"; > Hi Joshua, > > What is the advantage of the second example? I'd drop it. > Hi Jonathan, Per the datasheet, the MCP47A1 can have two different I2C slave addresses (0x2e and 0x3e), which allows two DACs to share the same bus, something I thought would be good to illustrate in the example. -- Kind regards, Joshua Crofts