xref: /optee_os/core/include/drivers/ls_gpio.h (revision 6dcd18c8f698ea84946f08d17db7ae19742c1e83)

/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright 2021 NXP
 *
 * Helper Code for GPIO controller driver
 *
 */

#ifndef __DRIVERS_LS_GPIO_H
#define __DRIVERS_LS_GPIO_H

#include <drivers/gpio.h>
#include <stdlib.h>
#include <tee_api_types.h>
#include <util.h>

/* supported ports for GPIO controller */
#define MAX_GPIO_PINS U(31)

/* map register values to LE by subtracting pin number from MAX GPIO PINS */
#define PIN_SHIFT(x) BIT(MAX_GPIO_PINS - (x))

/* gpio register offsets */
#define GPIODIR U(0x0)  /* direction register */
#define GPIOODR U(0x4)  /* open drain register */
#define GPIODAT U(0x8)  /* data register */
#define GPIOIER U(0xc)  /* interrupt event register */
#define GPIOIMR U(0x10) /* interrupt mask register */
#define GPIOICR U(0x14) /* interrupt control register */
#define GPIOIBE U(0x18) /* input buffer enable register */

/*
 * struct ls_gpio_chip_data describes GPIO controller chip instance
 * The structure contains below members:
 * chip:		generic GPIO chip handle.
 * gpio_base:		starting GPIO module base address managed by this GPIO
 *			controller.
 * gpio_controller:	GPIO controller to be used.
 */
struct ls_gpio_chip_data {
	struct gpio_chip chip;
	vaddr_t gpio_base;
	uint8_t gpio_controller;
};

/*
 * Initialize GPIO Controller
 * gpio_data is a pointer of type 'struct ls_gpio_chip_data'.
 */
TEE_Result ls_gpio_init(struct ls_gpio_chip_data *gpio_data);

#endif /* __DRIVERS_LS_GPIO_H */