void __p2pm_do_poff(void)
{
/* check GPIO port */
if(!gpio_is_valid_port(param.gpio)){
PWARNING("can't power-off in order to invalid gpio port=%d\n",param.gpio);
return;
}
PEMERG("power-off by GPIO port = %d\n",param.gpio);
gpio_set_value(param.gpio,param.pol?1:0);
}
/* initilazie */
static int init_key(struct msudev_keyev_ops *ops)
{
int retval = 0;
struct key_param *kp = (struct key_param *)ops->data;
memset(kp,0,sizeof(struct key_param));
/* get key mapping to gpio */
{
struct device_node *np;
const u32 *prop;
u32 len,i;
np = of_find_compatible_node(NULL,devtype,compatible);
if(!np){
_ERR("NOT found a node : dev_type=\"%s\", compatible=\"%s\"\n",
devtype, compatible);
retval = -EINVAL;
goto fail;
}
prop = of_get_property(np,"key-map",&len);
len /= sizeof(u32);
if(!prop||len<3||(len%3)){
_ERR("NOT found \"key-map\" property or too few cells in this property\n");
retval = -EINVAL;
goto fail;
}
kp->nr_map = len/3;
kp->maps = (struct gpio_maps *)kzalloc(sizeof(struct gpio_maps) * kp->nr_map,
GFP_KERNEL);
if(NULL==kp->maps){
_ERR("failed to allocate memory\n");
retval=-ENOMEM;
goto fail;
}
for(i=0;i<len;i+=3){
struct gpio_maps *p = &kp->maps[i/3];
p->keyno = prop[i];
if(p->keyno >= (sizeof(kp->keymap)*8)){
_ERR("invalid key number = %d\n", p->keyno);
retval = -EINVAL;
goto fail;
}
p->gpio = of_get_gpio(np,prop[i+1]);
if(p->gpio<0){
_ERR("NOT foud gpio port");
retval=p->gpio;
goto fail;
}
if(!gpio_is_valid_port(p->gpio)){
_ERR("invalid gpio = %d\n",p->gpio);
retval=-ENODEV;
goto fail;
}
if(prop[i+2])
p->flags |= FLAG_REVERSE;
_INFO("key[%d] --> gpio[%d]%s\n",p->keyno,p->gpio,(p->flags&FLAG_REVERSE)?" : REVERSE":"");
}
}
/* setup timer */
setup_timer(&(kp->timer),timer_fn,(unsigned long)&key_param);
kp->timer.expires = jiffies + timer_period;
add_timer(&(kp->timer));
fail:
if(retval<0){
/* deallocate memory */
if(kp->maps){
kfree(kp->maps);
kp->maps=NULL;
kp->nr_map = 0;
}
}
/* complete */
return retval;
}