# Copyright (c) 2020 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0


description: >
    This is a representation of the nRF21540 Radio Front-End module
compatible: "nordic,nrf21540-fem"

include: base.yaml

properties:
    tx-en-gpios:
        type: phandle-array
        required: false
        description: >
            Gpio of the SOC controlling TX_EN pin of the nRF21540
    rx-en-gpios:
        type: phandle-array
        required: false
        description: >
            Gpio of the SOC controlling RX_EN pin of the nRF21540
    pdn-gpios:
        type: phandle-array
        required: false
        description: >
            Gpio of the SOC controlling PDN pin of the nRF21540
    ant-sel-gpios:
        type: phandle-array
        required: false
        description: >
            Gpio of the SOC controlling ANT-SEL pin of the nRF21540
    mode-gpios:
        type: phandle-array
        required: false
        description: >
            Gpio of the SOC controlling MODE pin of the nRF21540
    spi-if:
        type: phandle
        required: false
        description: >
            Reference to the nordic,nrf21540-fem-spi SPI bus interface.

            This must be present to support SPI control of the FEM.
    tx-en-settle-time-us:
        type: int
        default: 11
        description: >
            Settling time in microseconds from state PG to TX.

            Default value is based on Table 6 of the nRF21540 Product Specification (v1.0),
            and can be overridden for tuned configurations.
    rx-en-settle-time-us:
        type: int
        default: 11
        description: >
            Settling time in microseconds from state PG to RX.

            Default value is based on Table 6 of the nRF21540 Product Specification (v1.0),
            and can be overridden for tuned configurations.
    pdn-settle-time-us:
        type: int
        default: 18
        description: >
            Settling time in microseconds from state PD to PG.

            Default value is based on Table 6 of the nRF21540 Product Specification (v1.0),
            and can be overridden for tuned configurations.
    trx-hold-time-us:
        type: int
        default: 3
        description: >
            Power-off time in microseconds when changing from RX or TX to PG.

            Default value is based on Table 6 of the nRF21540 Product Specification (v1.0),
            and can be overridden for tuned configurations.