Sagem F@st 240x Manual de usuario descargar pdf (Pagina 251)

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free_irq(button_irqs[i].irq, (void *)&button_irqs[i]);

}

return 0;

}

static int s3c64xx_buttons_read(struct file *filp, char __user *buff, size_t count, loff_t *offp)

{

unsigned long err;

if (!ev_press) {

if (filp->f_flags & O_NONBLOCK)

return -EAGAIN;

else

wait_event_interruptible(button_waitq, ev_press);

}

ev_press = 0;

err = copy_to_user((void *)buff, (const void *)(&key_values), min(sizeof(key_values), count));

return err ? -EFAULT : min(sizeof(key_values), count);

}

static unsigned int s3c64xx_buttons_poll( struct file *file, struct poll_table_struct *wait)

{

unsigned int mask = 0;

poll_wait(file, &button_waitq, wait);

if (ev_press)

mask |= POLLIN | POLLRDNORM;

return mask;

}

static struct file_operations dev_fops = {

.owner = THIS_MODULE,

.open = s3c64xx_buttons_open,

.release = s3c64xx_buttons_close,

.read = s3c64xx_buttons_read,

.poll = s3c64xx_buttons_poll,

};

static struct miscdevice misc = {

.minor = MISC_DYNAMIC_MINOR,

.name = DEVICE_NAME,

.fops = &dev_fops,

};

static int __init dev_init(void)

{

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Sagem F@st 240x Manual de usuario Pagina 251