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     1 * AT86RF230 IEEE 802.15.4 *
    2 
    3 Required properties:
    4   - compatible:         should be "atmel,at86rf230", "atmel,at86rf231",
    5                         "atmel,at86rf233" or "atmel,at86rf212"
    6   - spi-max-frequency:  maximal bus speed, should be set to 7500000 depends
    7                         sync or async operation mode
    8   - reg:                the chipselect index
    9   - interrupts:         the interrupt generated by the device. Non high-level
   10                         can occur deadlocks while handling isr.
   11 
   12 Optional properties:
   13   - reset-gpio:         GPIO spec for the rstn pin
   14   - sleep-gpio:         GPIO spec for the slp_tr pin
   15   - xtal-trim:          u8 value for fine tuning the internal capacitance
   16                         arrays of xtal pins: 0 = +0 pF, 0xf = +4.5 pF
   17 
   18 Example:
   19 
   20         at86rf231@0 {
   21                 compatible = "atmel,at86rf231";
   22                 spi-max-frequency = <7500000>;
   23                 reg = <0>;
   24                 interrupts = <19 4>;
   25                 interrupt-parent = <&gpio3>;
   26                 xtal-trim = /bits/ 8 <0x06>;
   27         };
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