static int nouveau_voltgpio_init(struct nouveau_device *device)
{
struct nouveau_volt *volt = &device->volt;
struct dcb_gpio_func func;
int i;
/* check we have gpio function info for each vid bit. on some
* boards (ie. nvs295) the vid mask has more bits than there
* are valid gpio functions... from traces, nvidia appear to
* just touch the existing ones, so let's mask off the invalid
* bits and continue with life
*/
for (i = 0; i < 8; i++) {
if (volt->vid_mask & (1 << i)) {
int ret = nouveau_gpio_find(device, 0, tags[i], 0xff, &func);
if (ret) {
if (ret != -ENOENT)
return ret;
nv_debug(device, "VID bit %d has no GPIO\n", i);
volt->vid_mask &= ~(1 << i);
}
}
}
return 0;
}
static int
nouveau_gpio_get(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line)
{
struct dcb_gpio_func func;
int ret;
ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
ret = nouveau_gpio_sense(gpio, idx, func.line);
if (ret >= 0)
ret = (ret == (func.log[1] & 1));
}
return ret;
}
static int
nouveau_gpio_set(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line, int state)
{
struct dcb_gpio_func func;
int ret;
ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
int dir = !!(func.log[state] & 0x02);
int out = !!(func.log[state] & 0x01);
ret = nouveau_gpio_drive(gpio, idx, func.line, dir, out);
}
return ret;
}
