// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.hardware.gpio;

using zx;

protocol Gpio {
    /// Configures a GPIO for input.
    ConfigIn(uint32 flags) -> () error zx.status;

    /// Configures a GPIO for output.
    ConfigOut(uint8 initial_value) -> () error zx.status;

    /// Reads the current value of a GPIO (0 or 1).
    Read() -> (uint8 value) error zx.status;

    /// Sets the current value of the GPIO (any non-zero value maps to 1).
    Write(uint8 value) -> () error zx.status;
};