mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-14 23:47:10 +02:00
3260740c92
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6839 3c298f89-4303-0410-b956-a3cf2f4a3e73
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
|
|
* ADM5120 LED (GPIO) driver
|
|
*
|
|
* Copyright (C) Jeroen Vreeken (pe1rxq@amsat.org), 2005
|
|
*/
|
|
|
|
#include <linux/autoconf.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/fs.h>
|
|
|
|
#define LED_MINOR 151
|
|
#define GPIO_IO ((unsigned long *)0xb20000b8)
|
|
|
|
static ssize_t adm5120_led_write(struct file *file, const char __user *data,
|
|
size_t len, loff_t *ppos)
|
|
{
|
|
unsigned char val;
|
|
|
|
if (!len || get_user(val, data))
|
|
return -EFAULT;
|
|
*GPIO_IO=(*GPIO_IO & 0x00ffffff) | (val<<24);
|
|
return 1;
|
|
}
|
|
|
|
static struct file_operations adm5120_led_fops = {
|
|
.owner = THIS_MODULE,
|
|
.write = adm5120_led_write,
|
|
};
|
|
|
|
static struct miscdevice adm5120_led_device = {
|
|
LED_MINOR,
|
|
"led",
|
|
&adm5120_led_fops,
|
|
};
|
|
|
|
static int __init adm5120_led_init(void)
|
|
{
|
|
printk(KERN_INFO "ADM5120 LED & GPIO driver\n");
|
|
if (misc_register(&adm5120_led_device)) {
|
|
printk(KERN_WARNING "Couldn't register device %d\n", LED_MINOR);
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit adm5120_led_exit(void)
|
|
{
|
|
misc_deregister(&adm5120_led_device);
|
|
}
|
|
|
|
module_init(adm5120_led_init);
|
|
module_exit(adm5120_led_exit);
|
|
|
|
MODULE_DESCRIPTION("ADM5120 LED and GPIO driver");
|
|
MODULE_AUTHOR("Jeroen Vreeken");
|
|
MODULE_LICENSE("GPL");
|