Service Indicators (LEDS)

The ‘leds’ node under ‘ibm,opal’ lists service indicators available in the system and their capabilities.

leds {
      compatible = "ibm,opal-v3-led";
      phandle = <0x1000006b>;
      linux,phandle = <0x1000006b>;
      led-mode = "lightpath";

      U78C9.001.RST0027-P1-C1 {
              led-types = "identify", "fault";
              phandle = <0x1000006f>;
              linux,phandle = <0x1000006f>;
      };
      /* Other LED nodes like the above one */
};

compatible

property describes LEDs compatibility.

led-mode

property describes service indicator mode (lightpath/guidinglight).

Each node under ‘leds’ node describes location code of FRU/Enclosure.

The properties under each node:

led-types

Supported indicators (attention/identify/fault).

These LEDs can be accessed through OPAL_LEDS_{GET/SET}_INDICATOR interfaces. Refer to Service Indicators (LEDS) for interface details.