1. 根目录:
2. arch
3. arm
4. plat-orion
5. include
6. plat
7. orion-gpio.h

/*
 * arch/arm/plat-orion/include/plat/orion-gpio.h
 *
 * Marvell Orion SoC GPIO handling.
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef __PLAT_GPIO_H
#define __PLAT_GPIO_H

#include <linux/init.h>
#include <linux/types.h>
#include <linux/irqdomain.h>

struct gpio_desc;

/*
 * Orion-specific GPIO API extensions.
 */
void orion_gpio_set_unused(unsigned pin);
void orion_gpio_set_blink(unsigned pin, int blink);
int orion_gpio_led_blink_set(struct gpio_desc *desc, int state,
	unsigned long *delay_on, unsigned long *delay_off);

#define GPIO_INPUT_OK		(1 << 0)
#define GPIO_OUTPUT_OK		(1 << 1)
void orion_gpio_set_valid(unsigned pin, int mode);

/* Initialize gpiolib. */
void __init orion_gpio_init(struct device_node *np,
			    int gpio_base, int ngpio,
			    void __iomem *base, int mask_offset,
			    int secondary_irq_base,
			    int irq[4]);

#endif