| // Copyright 2018 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.gpioimpl; |
| |
| using fuchsia.hardware.gpio; |
| using zx; |
| |
| @transport("Banjo") |
| @banjo_layout("ddk-protocol") |
| protocol GpioImpl { |
| /// Configures a GPIO for input. |
| ConfigIn(struct { |
| index uint32; |
| flags uint32; |
| }) -> (struct { |
| s zx.status; |
| }); |
| /// Configures a GPIO for output. |
| ConfigOut(struct { |
| index uint32; |
| initial_value uint8; |
| }) -> (struct { |
| s zx.status; |
| }); |
| /// Configures the GPIO pin for an alternate function (I2C, SPI, etc) |
| /// the interpretation of "function" is platform dependent. |
| SetAltFunction(struct { |
| index uint32; |
| function uint64; |
| }) -> (struct { |
| s zx.status; |
| }); |
| /// Configures the GPIO pin drive strength. |
| SetDriveStrength(struct { |
| index uint32; |
| ua uint64; |
| }) -> (struct { |
| s zx.status; |
| actual_ua uint64; |
| }); |
| /// Returns the configured drive strength for a GPIO pin in microamps (ua). |
| GetDriveStrength(struct { |
| index uint32; |
| }) -> (struct { |
| s zx.status; |
| value uint64; |
| }); |
| /// Reads the current value of a GPIO (0 or 1). |
| Read(struct { |
| index uint32; |
| }) -> (struct { |
| s zx.status; |
| value uint8; |
| }); |
| /// Sets the current value of the GPIO (any non-zero value maps to 1). |
| Write(struct { |
| index uint32; |
| value uint8; |
| }) -> (struct { |
| s zx.status; |
| }); |
| /// Gets an interrupt object pertaining to a particular GPIO pin. |
| GetInterrupt(struct { |
| index uint32; |
| flags uint32; |
| }) -> (resource struct { |
| s zx.status; |
| irq zx.handle:INTERRUPT; |
| }); |
| /// Release the interrupt. |
| ReleaseInterrupt(struct { |
| index uint32; |
| }) -> (struct { |
| s zx.status; |
| }); |
| /// Set GPIO polarity. |
| SetPolarity(struct { |
| index uint32; |
| polarity fuchsia.hardware.gpio.GpioPolarity; |
| }) -> (struct { |
| s zx.status; |
| }); |
| }; |