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-Analog Devices AD2S90 Resolver-to-Digital Converter
-
-https://www.analog.com/en/products/ad2s90.html
-
-Required properties:
- - compatible: should be "adi,ad2s90"
- - reg: SPI chip select number for the device
- - spi-max-frequency: set maximum clock frequency, must be 830000
- - spi-cpol and spi-cpha:
- Either SPI mode (0,0) or (1,1) must be used, so specify none or both of
- spi-cpha, spi-cpol.
-
-See for more details:
- Documentation/devicetree/bindings/spi/spi-bus.txt
-
-Note about max frequency:
- Chip's max frequency, as specified in its datasheet, is 2Mhz. But a 600ns
- delay is expected between the application of a logic LO to CS and the
- application of SCLK, as also specified. And since the delay is not
- implemented in the spi code, to satisfy it, SCLK's period should be at most
- 2 * 600ns, so the max frequency should be 1 / (2 * 6e-7), which gives
- roughly 830000Hz.
-
-Example:
-resolver@0 {
- compatible = "adi,ad2s90";
- reg = <0>;
- spi-max-frequency = <830000>;
- spi-cpol;
- spi-cpha;
-};
new file mode 100644
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/resolver/adi,ad2s90.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD2S90 Resolver-to-Digital Converter
+
+maintainers:
+ - Matheus Tavares <matheus.bernardino@usp.br>
+
+description: |
+ Datasheet: https://www.analog.com/en/products/ad2s90.html
+
+properties:
+ compatible:
+ const: adi,ad2s90
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 830000
+ description: |
+ Chip's max frequency, as specified in its datasheet, is 2Mhz. But a 600ns
+ delay is expected between the application of a logic LO to CS and the
+ application of SCLK, as also specified. And since the delay is not
+ implemented in the spi code, to satisfy it, SCLK's period should be at
+ most 2 * 600ns, so the max frequency should be 1 / (2 * 6e-7), which gives
+ roughly 830000Hz.
+
+ spi-cpol: true
+
+ spi-cpha: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+
+dependencies:
+ spi-cpol: [ spi-cpha ]
+ spi-cpha: [ spi-cpol ]
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ resolver@0 {
+ compatible = "adi,ad2s90";
+ reg = <0>;
+ spi-max-frequency = <830000>;
+ spi-cpol;
+ spi-cpha;
+ };
+ };
+...