/*
* Register the handler for a given RETU interrupt source.
*/
int retu_request_irq(int id, void *irq_handler, unsigned long arg, char *name)
{
struct retu_irq_handler_desc *hnd;
if (irq_handler == NULL || id >= MAX_RETU_IRQ_HANDLERS ||
name == NULL) {
printk(KERN_ERR PFX "Invalid arguments to %s\n",
__FUNCTION__);
return -EINVAL;
}
hnd = &retu_irq_handlers[id];
if (hnd->func != NULL) {
printk(KERN_ERR PFX "IRQ %d already reserved\n", id);
return -EBUSY;
}
printk(KERN_INFO PFX "Registering interrupt %d for device %s\n",
id, name);
hnd->func = irq_handler;
hnd->arg = arg;
strlcpy(hnd->name, name, sizeof(hnd->name));
retu_ack_irq(id);
retu_enable_irq(id);
return 0;
}
static void retu_headset_det_enable(struct retu_headset *hs)
{
mutex_lock(&hs->mutex);
if (!hs->detection_enabled) {
hs->detection_enabled = 1;
retu_set_clear_reg_bits(RETU_REG_CC1, (1 << 10) | (1 << 8), 0);
retu_enable_irq(RETU_INT_HOOK);
}
mutex_unlock(&hs->mutex);
}
