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     1 Zodiac Inflight Innovations RAVE Supervisory Processor
    2 
    3 RAVE Supervisory Processor communicates with SoC over UART. It is
    4 expected that its Device Tree node is specified as a child of a node
    5 corresponding to UART controller used for communication.
    6 
    7 Required parent device properties:
    8 
    9  - compatible: Should be one of:
   10         - "zii,rave-sp-niu"
   11         - "zii,rave-sp-mezz"
   12         - "zii,rave-sp-esb"
   13         - "zii,rave-sp-rdu1"
   14         - "zii,rave-sp-rdu2"
   15 
   16  - current-speed: Should be set to baud rate SP device is using
   17 
   18 RAVE SP consists of the following sub-devices:
   19 
   20 Device                           Description
   21 ------                           -----------
   22 rave-sp-wdt                     : Watchdog
   23 rave-sp-nvmem                   : Interface to onboard EEPROM
   24 rave-sp-backlight               : Display backlight
   25 rave-sp-hwmon                   : Interface to onboard hardware sensors
   26 rave-sp-leds                    : Interface to onboard LEDs
   27 rave-sp-input                   : Interface to onboard power button
   28 
   29 Example of usage:
   30 
   31         rdu {
   32                 compatible = "zii,rave-sp-rdu2";
   33                 current-speed = <1000000>;
   34 
   35                 watchdog {
   36                         compatible = "zii,rave-sp-watchdog";
   37                 };
   38         };
   39 
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