[Gc-linux-cvs] linux/drivers/gpio gpiolib.c,NONE,1.1

[Albert H. <he...@us...>]

Update of /cvsroot/gc-linux/linux/drivers/gpio
In directory ddv4jf1.ch3.sourceforge.com:/tmp/cvs-serv401/drivers/gpio

Added Files:
	gpiolib.c 
Log Message:
Add vanilla drivers/gpio/gpiolib.c, include/asm-generic/gpio.h and include/linux/gpio.h.


--- NEW FILE: gpiolib.c ---
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/gpio.h>


/* Optional implementation infrastructure for GPIO interfaces.
 *
 * Platforms may want to use this if they tend to use very many GPIOs
 * that aren't part of a System-On-Chip core; or across I2C/SPI/etc.
 *
 * When kernel footprint or instruction count is an issue, simpler
 * implementations may be preferred.  The GPIO programming interface
 * allows for inlining speed-critical get/set operations for common
[...1215 lines suppressed...]
	return single_open(file, gpiolib_show, NULL);
}

static struct file_operations gpiolib_operations = {
	.open		= gpiolib_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int __init gpiolib_debugfs_init(void)
{
	/* /sys/kernel/debug/gpio */
	(void) debugfs_create_file("gpio", S_IFREG | S_IRUGO,
				NULL, NULL, &gpiolib_operations);
	return 0;
}
subsys_initcall(gpiolib_debugfs_init);

#endif	/* DEBUG_FS */