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iio: proximity: as3935: add missing required spi-max-frequency
spi-max-frequency is required to be set for the as3935 part, and document such usage. Cc: devicetree@vger.kernel.org Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com> Signed-off-by: Rob Herring <robh@kernel.org>
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@ -3,6 +3,7 @@ Austrian Microsystems AS3935 Franklin lightning sensor device driver
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Required properties:
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- compatible: must be "ams,as3935"
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- reg: SPI chip select number for the device
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- spi-max-frequency: specifies maximum SPI clock frequency
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- spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI
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slave node bindings.
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- interrupt-parent : should be the phandle for the interrupt controller
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@ -21,6 +22,7 @@ Example:
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as3935@0 {
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compatible = "ams,as3935";
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reg = <0>;
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spi-max-frequency = <400000>;
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spi-cpha;
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interrupt-parent = <&gpio1>;
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interrupts = <16 1>;
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