diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2026-02-10 14:51:09 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2026-03-22 12:44:23 +0000 |
| commit | f789b8cc39f0dc46b1654aff84e420927bea4272 (patch) | |
| tree | 20966a80724f6ae428fc149fb7b01260f409ba40 | |
| parent | cfeae3ce3e5a5755aeada4930a84cf4cbac3ea10 (diff) | |
dt-bindings: iio: dac: maxim,ds4424: add maxim,rfs-ohms property
The Maxim DS4422/DS4424 and DS4402/DS4404 current DACs determine their
full-scale output current via external resistors (Rfs) connected to the
FSx pins. Without knowing these values, the full-scale range of the
hardware is undefined.
Add the 'maxim,rfs-ohms' property to describe these physical components.
This property is required to provide a complete description of the
hardware configuration.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | Documentation/devicetree/bindings/iio/dac/maxim,ds4424.yaml | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/dac/maxim,ds4424.yaml b/Documentation/devicetree/bindings/iio/dac/maxim,ds4424.yaml index efe63e6cb55d..4323df2036ac 100644 --- a/Documentation/devicetree/bindings/iio/dac/maxim,ds4424.yaml +++ b/Documentation/devicetree/bindings/iio/dac/maxim,ds4424.yaml @@ -27,9 +27,43 @@ properties: vcc-supply: true + maxim,rfs-ohms: + description: | + Array of resistance values in Ohms for the external Rfs resistors + connected to the FS pins. These values determine the full-scale + output current. The actual resistance depends on the chip variant + and specific hardware design requirements. + minItems: 2 + maxItems: 4 + required: - compatible - reg + - maxim,rfs-ohms + +allOf: + - if: + properties: + compatible: + contains: + enum: + - maxim,ds4402 + - maxim,ds4422 + then: + properties: + maxim,rfs-ohms: + maxItems: 2 + - if: + properties: + compatible: + contains: + enum: + - maxim,ds4404 + - maxim,ds4424 + then: + properties: + maxim,rfs-ohms: + minItems: 4 additionalProperties: false @@ -43,6 +77,7 @@ examples: compatible = "maxim,ds4424"; reg = <0x10>; /* When A0, A1 pins are ground */ vcc-supply = <&vcc_3v3>; + maxim,rfs-ohms = <40000>, <40000>, <40000>, <40000>; }; }; ... |