# Copyright (c) 2020-2021 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

description: |
    This is a representation of generic radio Front-End Module (FEM)
    that has a two-pin control interface (CTX, CRX).

    The CTX control pin is used to enable the Power Amplifier (PA) in
    the transmit path. This is therefore sometimes referred to as
    the "PA pin" in other contexts.

    The CRX control pin is used to enable the Low Noise Amplifier
    (LNA) in the receive path, and is sometimes referred to as
    the "LNA pin" in other contexts.

    Each of these pins is optional, and may be omitted if not present.
    (Though if you do specify a pin, you must also specify its
    corresponding settle-time-us property.)

compatible: "generic-fem-two-ctrl-pins"

include: base.yaml

properties:
  ctx-gpios:
    type: phandle-array
    description: |
        SoC GPIO connected to the CTX input pin on the FEM device.

  crx-gpios:
    type: phandle-array
    description: |
        SoC GPIO connected to the CRX input pin on the FEM device.

  ctx-settle-time-us:
    type: int
    description: |
        Desired minimum settling time, in microseconds, from
        assertion of the CTX pin to beginning of transmission.

  crx-settle-time-us:
    type: int
    description: |
        Desired minimum settling time, in microseconds, from
        assertion of the CRX pin to beginning of reception.

  tx-gain-db:
    type: int
    description: |
        TX gain of the PA of the FEM device, in dB.

  rx-gain-db:
    type: int
    description: |
        RX gain of the LNA of the FEM device, in dB.