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Fri, 08 May 2026 18:38:00 -0700 (PDT) From: Hungyu Lin To: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Hungyu Lin Subject: [PATCH v3 1/1] dt-bindings: iio: dds: Add AD9832/AD9835 binding Date: Sat, 9 May 2026 01:37:45 +0000 Message-Id: <20260509013745.80478-2-dennylin0707@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260509013745.80478-1-dennylin0707@gmail.com> References: <20260509013745.80478-1-dennylin0707@gmail.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add devicetree binding documentation for AD9832 and AD9835 DDS devices. These devices are SPI-controlled direct digital synthesizers requiring AVDD, DVDD supplies and an external master clock. Require spi-cpol since AD9832/AD9835 use SPI mode 2. Update the example to include spi-cpol and use a generic node name. Signed-off-by: Hungyu Lin --- .../bindings/iio/dds/adi,ad9832.yaml | 91 +++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml diff --git a/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml b/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml new file mode 100644 index 000000000000..9f3e41cb0a0d --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dds/adi,ad9832.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD9832 / AD9835 DDS + +maintainers: + - Hungyu Lin + +description: | + Binding for Analog Devices AD9832 and AD9835 SPI-controlled direct + digital synthesizers (DDS). The devices use an external master clock + and are controlled over a serial SPI-compatible interface. + +properties: + compatible: + enum: + - adi,ad9832 + - adi,ad9835 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 20000000 + + spi-cpol: true + + clocks: + maxItems: 1 + description: + External master clock input. + + clock-names: + const: mclk + + avdd-supply: + description: + Analog power supply. + + dvdd-supply: + description: + Digital power supply. + +required: + - compatible + - reg + - clocks + - clock-names + - avdd-supply + - dvdd-supply + - spi-cpol + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + mclk: clock { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <25000000>; + }; + + vdd_3v3: regulator { + compatible = "regulator-fixed"; + regulator-name = "vdd_3v3"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + }; + + spi { + #address-cells = <1>; + #size-cells = <0>; + + dds@0 { + compatible = "adi,ad9832"; + reg = <0>; + spi-max-frequency = <20000000>; + spi-cpol; + clocks = <&mclk>; + clock-names = "mclk"; + avdd-supply = <&vdd_3v3>; + dvdd-supply = <&vdd_3v3>; + }; + }; -- 2.34.1