File content as of revision 2:7aab896b1a3b:

{
    "name": "atmel-rf",
    "config": {
        "full-spi-speed": {
            "help": "Maximum SPI clock speed (Hz), as long as sufficient inter-byte spacing",
            "value": 7500000
        },
        "full-spi-speed-byte-spacing": {
            "help": "Required byte spacing in nanoseconds if full SPI speed is in use",
            "value": 250
        },
        "low-spi-speed": {
            "help": "Maximum SPI clock speed (Hz) if no inter-byte spacing",
            "value": 3750000
        },
        "use-spi-spacing-api": {
            "help": "Use SPI spacing API proposed in https://github.com/ARMmbed/mbed-os/pull/5353 to ensure spacing between bytes - either run at full speed with spacing, or low with no spacing",
            "value": false
        },
        "assume-spaced-spi":  {
            "help": "If not using SPI spacing API, assume platform has widely-spaced bytes in bursts, so use full clock speed rather than low.",
            "value": false
        },
        "provide-default": {
            "help": "Provide default NanostackRfpy. [true/false]",
            "value": false
        }
    },
    "target_overrides": {
        "STM": {
            "assume-spaced-spi": true
        }
    }
}