The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/iio/dac/ltc2632.txt

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    1 Linear Technology LTC2632/2634/2636 DAC
    2 
    3 Required properties:
    4  - compatible: Has to contain one of the following:
    5         lltc,ltc2632-l12
    6         lltc,ltc2632-l10
    7         lltc,ltc2632-l8
    8         lltc,ltc2632-h12
    9         lltc,ltc2632-h10
   10         lltc,ltc2632-h8
   11         lltc,ltc2634-l12
   12         lltc,ltc2634-l10
   13         lltc,ltc2634-l8
   14         lltc,ltc2634-h12
   15         lltc,ltc2634-h10
   16         lltc,ltc2634-h8
   17         lltc,ltc2636-l12
   18         lltc,ltc2636-l10
   19         lltc,ltc2636-l8
   20         lltc,ltc2636-h12
   21         lltc,ltc2636-h10
   22         lltc,ltc2636-h8
   23 
   24 Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
   25 apply. In particular, "reg" and "spi-max-frequency" properties must be given.
   26 
   27 Optional properties:
   28         - vref-supply: Phandle to the external reference voltage supply. This should
   29           only be set if there is an external reference voltage connected to the VREF
   30           pin. If the property is not set the internal reference is used.
   31 
   32 Example:
   33 
   34         vref: regulator-vref {
   35                 compatible = "regulator-fixed";
   36                 regulator-name = "vref-ltc2632";
   37                 regulator-min-microvolt = <1250000>;
   38                 regulator-max-microvolt = <1250000>;
   39                 regulator-always-on;
   40         };
   41 
   42         spi_master {
   43                 dac: ltc2632@0 {
   44                         compatible = "lltc,ltc2632-l12";
   45                         reg = <0>; /* CS0 */
   46                         spi-max-frequency = <1000000>;
   47                         vref-supply = <&vref>; /* optional */
   48                 };
   49         };

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