cregit-Linux how code gets into the kernel

Release 4.7 include/linux/platform_data/gpio-davinci.h

/*
 * DaVinci GPIO Platform Related Defines
 *
 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __DAVINCI_GPIO_PLATFORM_H

#define __DAVINCI_GPIO_PLATFORM_H

#include <linux/io.h>
#include <linux/spinlock.h>

#include <asm-generic/gpio.h>


struct davinci_gpio_platform_data {
	
u32	ngpio;
	
u32	gpio_unbanked;
};



struct davinci_gpio_controller {
	
struct gpio_chip	chip;
	
struct irq_domain	*irq_domain;
	/* Serialize access to GPIO registers */
	
spinlock_t		lock;
	
void __iomem		*regs;
	
void __iomem		*set_data;
	
void __iomem		*clr_data;
	
void __iomem		*in_data;
	
int			gpio_unbanked;
	
unsigned		gpio_irq;
};

/*
 * basic gpio routines
 */

#define	GPIO(X)		(X)	
/* 0 <= X <= (DAVINCI_N_GPIO - 1) */

/* Convert GPIO signal to GPIO pin number */

#define GPIO_TO_PIN(bank, gpio)	(16 * (bank) + (gpio))


static inline u32 __gpio_mask(unsigned gpio) { return 1 << (gpio % 32); }

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#endif

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