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Add TPSChrome comments on charging code

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This change adds more comments on charging states and fixes battery
temperature out of range log messages.

Signed-off-by: Rong Chang <rongchang@chromium.org>
BUG=chrome-os-partner:10900,12222
TEST=none

Change-Id: Ie3240dc246ad7590078929e41575c67798373aca
Reviewed-on: https://gerrit.chromium.org/gerrit/29253
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Ready: Rong Chang <rongchang@chromium.org>
Tested-by: Rong Chang <rongchang@chromium.org>
This commit is contained in:
Rong Chang
2012-08-05 19:18:54 +08:00
committed by Gerrit
parent 6156c1b904
commit ea9a51856e
1 changed files with 38 additions and 5 deletions
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43
common/pmu_tps65090_charger.c
View File

@@ -134,6 +134,9 @@ static int wait_t3_discharging(void)
return ST_DISCHARGING;
}
/*
* Turn off the host application processor
*/
static int system_off(void)
{
if (chipset_in_state(CHIPSET_STATE_ON)) {
@@ -152,6 +155,9 @@ static int system_off(void)
return wait_t1_idle();
}
/*
* Notify the host when battery remaining charge is lower than 10%
*/
static int notify_battery_low(void)
{
static timestamp_t last_notify_time;
@@ -231,35 +237,62 @@ static int calc_next_state(int state)
return ST_PRE_CHARGING;
case ST_CHARGING:
/* Go back to idle state when AC is unplugged */
if (!get_ac())
break;
if (battery_temperature(&batt_temp) ||
!battery_charging_range(batt_temp)) {
CPUTS("[pmu] charging: battery hot\n");
/*
* Disable charging on battery access error, or charging
* temperature out of range.
*/
if (battery_temperature(&batt_temp)) {
CPUTS("[pmu] charging: unable to get battery "
"temperature\n");
enable_charging(0);
break;
} else if (!battery_charging_range(batt_temp)) {
CPRINTF("[pmu] charging: temperature out of range "
"%dC\n",
battery_temperature_celsius(batt_temp));
enable_charging(0);
break;
}
/*
* Disable charging on battery alarm events or access error:
* - over temperature
* - over current
*/
if (battery_status(&alarm) || (alarm & ALARM_CHARGING)) {
CPUTS("[pmu] charging: battery alarm\n");
enable_charging(0);
break;
}
/*
* Disable charging on charger alarm events:
* - charger over current
* - charger over temperature
*/
if (pmu_is_charger_alarm()) {
CPUTS("[pmu] charging: charger alarm\n");
enable_charging(0);
break;
}
return wait_t2_charging();
case ST_DISCHARGING:
/* Go back to idle state when AC is plugged */
if (get_ac())
return wait_t1_idle();
/* Check battery discharging temperature range */
if (battery_temperature(&batt_temp) == 0) {
if (!battery_discharging_range(batt_temp)) {
CPUTS("[pmu] discharging: battery hot\n");
CPRINTF("[pmu] discharging: temperature out of"
"range %dC\n",
battery_temperature_celsius(batt_temp));
enable_charging(0);
return system_off();
}