sonic-buildimage/device/celestica/x86_64-cel_belgite-r0/pddf/pd-plugin.json

{
    "XCVR":
    {
        "xcvr_present":
        {
           "i2c":
           {
               "valmap-SFP+": {"1":false, "0":true }
           }
        }
    },
    "PSU":
    {
        "psu_present": 
        {
            "i2c":
            {
                "valmap": { "1":true, "0":false }
            }
        },
        "psu_power_good": 
        {
            "i2c":
            {
                "valmap": { "0": true, "1":false }
            }
        },
        "psu_fan_dir":
        {
            "i2c":
            {
                "valmap": { "0":"INTAKE", "1":"EXHAUST" }
            }
        },
        "PSU_FAN_MAX_SPEED":"18000"
    },
    "FAN":
    {
        "direction":
        {
            "i2c":
            {
                "valmap": {"1":"EXHAUST", "0":"INTAKE"}
            }
        },
        "present":
        {
            "i2c":
            {
                "valmap": {"1":false, "0":true}
            }
        },
        "duty_cycle_to_pwm": "lambda dc: dc*255/100",

        "pwm_to_duty_cycle": "lambda pwm: pwm/255*100"
    }
}