The AD3530R/AD3530 is an 8-Channel, 16-Bit Voltage Output DAC, while the
AD3531R/AD3531 is a 4-Channel, 16-Bit Voltage Output DAC. These devices
include software-programmable gain controls that provide full-scale
output spans of 2.5V or 5V for reference voltages of 2.5V. They operate
from a single supply voltage range of 2.7V to 5.5V and are guaranteed to
be monotonic by design. Additionally, these devices features a 2.5V,
5ppm/°C internal reference, which is disabled by default.
This adds the documentation for ad3530r.
Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com>
---
.../devicetree/bindings/iio/dac/adi,ad3530r.yaml | 89 ++++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 90 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..6b50dce38383c8eb0d2107bf4e44cd320776f481
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ad3530r.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD3530R and Similar DACs
+
+maintainers:
+ - Kim Seer Paller <kimseer.paller@analog.com>
+
+description: |
+ The AD3530R/AD3530 are low power, 8-channel, 16-bit, buffered voltage output,
+ DACs that include a 2.5V internal reference (disabled by default), and a gain
+ bit field, resulting in a full-scale output span of 2.5V (gain = 1) or 5V
+ (gain = 2) for a reference voltage of 2.5V.
+ Datasheet can be found here:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/2664fa.pdf
+
+properties:
+ compatible:
+ enum:
+ - adi,ad3530r
+ - adi,ad3531r
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 50000000
+
+ vdd-supply:
+ description: Power Supply Input.
+
+ iovdd-supply:
+ description: Digital Power Supply Input.
+
+ ref-supply:
+ description:
+ Reference Input/Output. The voltage at the REF pin sets the full-scale
+ range of all channels. If not provided the internal reference is used and
+ also provided on the VREF pin.
+
+ reset-gpios:
+ description:
+ Active low signal that is falling edge sensitive. When it is deasserted,
+ the digital core initialization is performed and all DAC registers except
+ the Interface Configuration A register are reset to their default values.
+ maxItems: 1
+
+ ldac-gpios:
+ description:
+ LDAC pin to be used as a hardware trigger to update the DAC channels. If
+ not present, the DAC channels are updated by Software LDAC.
+ maxItems: 1
+
+ adi,double-output-range:
+ description:
+ Configure the output range for all channels. If the property is present,
+ the output will range from 0V to 2Vref. If the property is not
+ present, the output will range from 0V to Vref.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - vdd-supply
+ - iovdd-supply
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+additionalProperties: false
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ dac@0 {
+ compatible = "adi,ad3530r";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+
+ vdd-supply = <&vdd>;
+ iovdd-supply = <&iovdd>;
+ };
+ };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 2d3c31c74594ca1934c67e7aad0a179feeaa39bf..7862469226f52375adc219115ef68d03662127be 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1295,6 +1295,7 @@ L: linux-iio@vger.kernel.org
S: Supported
W: https://ez.analog.com/linux-software-drivers
F: Documentation/ABI/testing/sysfs-bus-iio-dac-ad3530r
+F: Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml
ANALOG DEVICES INC AD3552R DRIVER
M: Nuno Sá <nuno.sa@analog.com>
--
2.34.1
On Wed, Mar 19, 2025 at 11:47:57AM +0800, Kim Seer Paller wrote: > The AD3530R/AD3530 is an 8-Channel, 16-Bit Voltage Output DAC, while the "Document the AD3530R/AD3530, an 8-Channel, 16-bit...." > AD3531R/AD3531 is a 4-Channel, 16-Bit Voltage Output DAC. These devices > include software-programmable gain controls that provide full-scale > output spans of 2.5V or 5V for reference voltages of 2.5V. They operate > from a single supply voltage range of 2.7V to 5.5V and are guaranteed to > be monotonic by design. Additionally, these devices features a 2.5V, > 5ppm/°C internal reference, which is disabled by default. > > This adds the documentation for ad3530r. And that sentence us really not needed. See submitting patches. > > Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com> > --- > .../devicetree/bindings/iio/dac/adi,ad3530r.yaml | 89 ++++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 90 insertions(+) > > diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml > new file mode 100644 > index 0000000000000000000000000000000000000000..6b50dce38383c8eb0d2107bf4e44cd320776f481 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad3530r.yaml > @@ -0,0 +1,89 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/dac/adi,ad3530r.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices AD3530R and Similar DACs > + > +maintainers: > + - Kim Seer Paller <kimseer.paller@analog.com> > + > +description: | > + The AD3530R/AD3530 are low power, 8-channel, 16-bit, buffered voltage output, > + DACs that include a 2.5V internal reference (disabled by default), and a gain > + bit field, resulting in a full-scale output span of 2.5V (gain = 1) or 5V > + (gain = 2) for a reference voltage of 2.5V. > + Datasheet can be found here: > + https://www.analog.com/media/en/technical-documentation/data-sheets/2664fa.pdf > + > +properties: > + compatible: > + enum: > + - adi,ad3530r > + - adi,ad3531r > + > + reg: > + maxItems: 1 > + > + spi-max-frequency: > + maximum: 50000000 > + > + vdd-supply: > + description: Power Supply Input. > + > + iovdd-supply: > + description: Digital Power Supply Input. > + > + ref-supply: > + description: > + Reference Input/Output. The voltage at the REF pin sets the full-scale > + range of all channels. If not provided the internal reference is used and > + also provided on the VREF pin. > + > + reset-gpios: > + description: > + Active low signal that is falling edge sensitive. When it is deasserted, > + the digital core initialization is performed and all DAC registers except > + the Interface Configuration A register are reset to their default values. > + maxItems: 1 > + > + ldac-gpios: > + description: > + LDAC pin to be used as a hardware trigger to update the DAC channels. If > + not present, the DAC channels are updated by Software LDAC. > + maxItems: 1 > + > + adi,double-output-range: > + description: > + Configure the output range for all channels. If the property is present, > + the output will range from 0V to 2Vref. If the property is not > + present, the output will range from 0V to Vref. You already have adi,range-double. It's not us who should find it, but you. You have just ADI bindings to look at. We have all bindings. Best regards, Krzysztof
On Wed, 19 Mar 2025 11:47:57 +0800, Kim Seer Paller wrote: > The AD3530R/AD3530 is an 8-Channel, 16-Bit Voltage Output DAC, while the > AD3531R/AD3531 is a 4-Channel, 16-Bit Voltage Output DAC. These devices > include software-programmable gain controls that provide full-scale > output spans of 2.5V or 5V for reference voltages of 2.5V. They operate > from a single supply voltage range of 2.7V to 5.5V and are guaranteed to > be monotonic by design. Additionally, these devices features a 2.5V, > 5ppm/°C internal reference, which is disabled by default. > > This adds the documentation for ad3530r. > > Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com> > --- > .../devicetree/bindings/iio/dac/adi,ad3530r.yaml | 89 ++++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 90 insertions(+) > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: dtschema/dtc warnings/errors: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.example.dtb: adc@0: pwm-names: ['convst1'] is too short from schema $id: http://devicetree.org/schemas/iio/adc/adi,ad7606.yaml# doc reference errors (make refcheckdocs): Warning: Documentation/arch/powerpc/cxl.rst references a file that doesn't exist: Documentation/ABI/testing/sysfs-class-cxl Warning: lib/Kconfig.debug references a file that doesn't exist: Documentation/dev-tools/fault-injection/fault-injection.rst Documentation/arch/powerpc/cxl.rst: Documentation/ABI/testing/sysfs-class-cxl lib/Kconfig.debug: Documentation/dev-tools/fault-injection/fault-injection.rst See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250319-togreg-v1-3-d8244a502f2c@analog.com The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
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