/*
* FET1: Backlight on the Chromebook
* FET6: LCD panel on the Chromebook
*/
void
tps65090_fet_enable(int fet)
{
int i;
if (fet < 1 || fet > NFET)
return;
for (i = 0; i < 10; i++) {
if (!tps65090_fet_set(fet, 1))
break;
if (i != 9)
tps65090_fet_set(fet, 0);
}
}
int tps65090_fet_enable(unsigned int fet_id)
{
struct pmic *pmic;
ulong start;
int loops;
int ret;
ret = tps65090_check_fet(fet_id);
if (ret)
return ret;
pmic = pmic_get(TPS65090_NAME);
if (!pmic)
return -EACCES;
start = get_timer(0);
for (loops = 0;; loops++) {
ret = tps65090_fet_set(pmic, fet_id, true);
if (!ret)
break;
if (get_timer(start) > 100)
break;
/* Turn it off and try again until we time out */
tps65090_fet_set(pmic, fet_id, false);
}
if (ret)
debug("%s: FET%d failed to power on: time=%lums, loops=%d\n",
__func__, fet_id, get_timer(start), loops);
else if (loops)
debug("%s: FET%d powered on after %lums, loops=%d\n",
__func__, fet_id, get_timer(start), loops);
/*
* Unfortunately, there are some conditions where the power
* good bit will be 0, but the fet still comes up. One such
* case occurs with the lcd backlight. We'll just return 0 here
* and assume that the fet will eventually come up.
*/
if (ret == -EAGAIN)
ret = 0;
return ret;
}
void
tps65090_fet_disable(int fet)
{
if (fet < 1 || fet > NFET)
return;
tps65090_fet_set(fet, 0);
}
int tps65090_fet_enable(unsigned int fet_id)
{
int loops;
ulong start;
int ret = 0;
if (tps65090_check_fet(fet_id))
return -1;
if (tps65090_select())
return -1;
start = get_timer(0);
for (loops = 0; ; loops++) {
ret = tps65090_fet_set(fet_id, 1);
if (!ret)
break;
if (get_timer(start) > 100)
break;
/* Turn it off and try again until we time out */
tps65090_fet_set(fet_id, 0);
}
tps65090_deselect();
if (ret) {
debug("%s: FET%d failed to power on: time=%lums, loops=%d\n",
__func__, fet_id, get_timer(start), loops);
} else if (loops) {
debug("%s: FET%d powered on after %lums, loops=%d\n",
__func__, fet_id, get_timer(start), loops);
}
/*
* Unfortunately, there are some conditions where the power
* good bit will be 0, but the fet still comes up. One such
* case occurs with the lcd backlight. We'll just return 0 here
* and assume that the fet will eventually come up.
*/
if (ret == FET_ERR_NOT_READY)
ret = 0;
return ret;
}
int tps65090_fet_disable(unsigned int fet_id)
{
int ret;
if (tps65090_check_fet(fet_id))
return -1;
if (tps65090_select())
return -1;
ret = tps65090_fet_set(fet_id, 0);
tps65090_deselect();
return ret;
}
int tps65090_fet_disable(unsigned int fet_id)
{
struct pmic *pmic;
int ret;
ret = tps65090_check_fet(fet_id);
if (ret)
return ret;
pmic = pmic_get(TPS65090_NAME);
if (!pmic)
return -EACCES;
ret = tps65090_fet_set(pmic, fet_id, false);
return ret;
}
