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freebsd/Bindings/iio/dac/ad7303.txt
Warner Losh 0d4a4b1301 Bring in Ian Campbell's pruned dts repo.
From git://xenbits.xen.org/people/ianc/device-tree-rebasing.git
commit efa963ec806366c9628dfd1269316bb93b7ecb15
Merge: a72ba09 459c249
Author: Ian Campbell <ian.campbell@citrix.com>
Date:   Wed Feb 26 08:39:16 2014 +0000

    Merge tag 'v3.14-rc4-dts'

    Linux 3.14-rc4
2014-02-27 19:39:44 +00:00

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Analog Devices AD7303 DAC device driver
Required properties:
- compatible: Must be "adi,ad7303"
- reg: SPI chip select number for the device
- spi-max-frequency: Max SPI frequency to use (< 30000000)
- Vdd-supply: Phandle to the Vdd power supply
Optional properties:
- REF-supply: Phandle to the external reference voltage supply. This should
only be set if there is an external reference voltage connected to the REF
pin. If the property is not set Vdd/2 is used as the reference voltage.
Example:
ad7303@4 {
compatible = "adi,ad7303";
reg = <4>;
spi-max-frequency = <10000000>;
Vdd-supply = <&vdd_supply>;
adi,use-external-reference;
REF-supply = <&vref_supply>;
};