[PATCH 3/4] dt-bindings: iio: dac: Add adi,ad3530r.yaml
From: Kim Seer Paller
Date: Tue Mar 18 2025 - 23:50:20 EST
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@xxxxxxxxxx>
---
.../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@xxxxxxxxxx>
+
+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@xxxxxxxxxxxxxxx
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@xxxxxxxxxx>
--
2.34.1