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diff --git a/dts/Bindings/iio/resolver/ad2s90.txt b/dts/Bindings/iio/resolver/ad2s90.txt
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--- a/dts/Bindings/iio/resolver/ad2s90.txt
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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;
-};