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Handle overtemp condition in discharging state

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This change adds battery operating temperature check. Host and EC
will be turned off when overtemp. EC can be waked up by predefined
external signals like key press or AC_PRESENT gpio.

For safty reason, this change does not check battery temperature
after EC deep sleep.

Signed-off-by: Rong Chang <rongchang@chromium.org>
BUG=chrome-os-partner:8451,9108
TEST=none
  Mock battery_temperature() fucntion to test.

Change-Id: I3203515b3df86192f690f9b98901020209ce49b3
This commit is contained in:
Rong Chang
2012-04-25 11:45:16 +08:00
parent 470916fb0f
commit 5774ebbd78
1 changed files with 6 additions and 2 deletions
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8
common/charge_state.c
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@@ -388,15 +388,19 @@ static enum power_state state_charge(struct power_state_context *ctx)
*/
static enum power_state state_discharge(struct power_state_context *ctx)
{
struct batt_params *batt = &ctx->curr.batt;
if (ctx->curr.ac)
return PWR_STATE_INIT;
if (ctx->curr.error)
return PWR_STATE_ERROR;
/* TODO(rong): crosbug.com/p/8451
* handle overtemp in discharge mode
/* Overtemp in discharging state
* - poweroff host and ec
*/
if (batt->temperature > ctx->battery->temp_discharge_max ||
batt->temperature < ctx->battery->temp_discharge_min)
poweroff_wait_ac();
return PWR_STATE_UNCHANGE;
}