static int __init dev_init(void)
{
int ret;
ret = misc_register(&misc);
printk (DEVICE_NAME"\tinitialized\n");
s3c2410_gpio_cfgpin(S3C2410_GPG(4), S3C2410_GPIO_OUTPUT);
set_bl(1);
return ret;
}
static ssize_t dev_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
{
unsigned char ch;
int ret;
if (count == 0) {
return count;
}
ret = copy_from_user(&ch, buffer, sizeof ch) ? -EFAULT : 0;
if (ret) {
return ret;
}
ch &= 0x01;
set_bl(ch);
return count;
}
static int __init bl_dev_init(void)
{
int ret;
ret = gpio_request(GPIO_BL, "backlight");
if (ret) {
printk("%s: request GPIO %d for backlight failed, ret = %d\n",
DEVICE_NAME, GPIO_BL, ret);
return ret;
}
s3c_gpio_cfgpin(GPIO_BL, S3C_GPIO_OUTPUT);
set_bl(1);
gpio_free(GPIO_BL);
ret = misc_register(&misc);
printk(DEVICE_NAME"\tinitialized\n");
return ret;
}