raspberrypi-utils-sys 0.0.4

Low-level unsafe bindings to raspberrypi-utils
Documentation 
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// SPDX-License-Identifier: BSD-3-Clause
/*
 * Copyright (c) 2024 Raspberry Pi Ltd.
 * All rights reserved.
 */
#ifndef _HARDWARE_GPIO_H
#define _HARDWARE_GPIO_H

#include "pio_platform.h"

#ifndef PARAM_ASSERTIONS_ENABLED_GPIO
#define PARAM_ASSERTIONS_ENABLED_GPIO 0
#endif

#define NUM_BANK0_GPIOS 32

enum gpio_function {
    GPIO_FUNC_XIP = 0,
    GPIO_FUNC_SPI = 1,
    GPIO_FUNC_UART = 2,
    GPIO_FUNC_I2C = 3,
    GPIO_FUNC_PWM = 4,
    GPIO_FUNC_SIO = 5,
    GPIO_FUNC_PIO0 = 6,
    GPIO_FUNC_PIO1 = 7,
    GPIO_FUNC_GPCK = 8,
    GPIO_FUNC_USB = 9,
    GPIO_FUNC_NULL = 0x1f,
};

#define GPIO_OUT 1
#define GPIO_IN 0

enum gpio_irq_level {
    GPIO_IRQ_LEVEL_LOW = 0x1u,
    GPIO_IRQ_LEVEL_HIGH = 0x2u,
    GPIO_IRQ_EDGE_FALL = 0x4u,
    GPIO_IRQ_EDGE_RISE = 0x8u,
};

enum gpio_override {
    GPIO_OVERRIDE_NORMAL = 0,      ///< peripheral signal selected via \ref gpio_set_function
    GPIO_OVERRIDE_INVERT = 1,      ///< invert peripheral signal selected via \ref gpio_set_function
    GPIO_OVERRIDE_LOW = 2,         ///< drive low/disable output
    GPIO_OVERRIDE_HIGH = 3,        ///< drive high/enable output
};
enum gpio_slew_rate {
    GPIO_SLEW_RATE_SLOW = 0,  ///< Slew rate limiting enabled
    GPIO_SLEW_RATE_FAST = 1   ///< Slew rate limiting disabled
};

enum gpio_drive_strength {
    GPIO_DRIVE_STRENGTH_2MA = 0, ///< 2 mA nominal drive strength
    GPIO_DRIVE_STRENGTH_4MA = 1, ///< 4 mA nominal drive strength
    GPIO_DRIVE_STRENGTH_8MA = 2, ///< 8 mA nominal drive strength
    GPIO_DRIVE_STRENGTH_12MA = 3 ///< 12 mA nominal drive strength
};

static inline void check_gpio_param(__unused uint gpio) {
    invalid_params_if(GPIO, gpio >= NUM_BANK0_GPIOS);
}

#endif