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path: root/drivers/power/olpc_battery.c
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Diffstat (limited to 'drivers/power/olpc_battery.c')
-rw-r--r--drivers/power/olpc_battery.c62
1 files changed, 58 insertions, 4 deletions
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index eaf917dc30d4..a89a41acf9c5 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -232,11 +232,9 @@ static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
case POWER_SUPPLY_TECHNOLOGY_LiFe:
switch (mfr) {
- case 1: /* Gold Peak */
- val->intval = 2800000;
- break;
+ case 1: /* Gold Peak, fall through */
case 2: /* BYD */
- val->intval = 3100000;
+ val->intval = 2800000;
break;
default:
return -EIO;
@@ -268,6 +266,55 @@ static int olpc_bat_get_charge_now(union power_supply_propval *val)
return 0;
}
+static int olpc_bat_get_voltage_max_design(union power_supply_propval *val)
+{
+ uint8_t ec_byte;
+ union power_supply_propval tech;
+ int mfr;
+ int ret;
+
+ ret = olpc_bat_get_tech(&tech);
+ if (ret)
+ return ret;
+
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ mfr = ec_byte >> 4;
+
+ switch (tech.intval) {
+ case POWER_SUPPLY_TECHNOLOGY_NiMH:
+ switch (mfr) {
+ case 1: /* Gold Peak */
+ val->intval = 6000000;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ case POWER_SUPPLY_TECHNOLOGY_LiFe:
+ switch (mfr) {
+ case 1: /* Gold Peak */
+ val->intval = 6400000;
+ break;
+ case 2: /* BYD */
+ val->intval = 6500000;
+ break;
+ default:
+ return -EIO;
+ }
+ break;
+
+ default:
+ return -EIO;
+ }
+
+ return ret;
+}
+
/*********************************************************************
* Battery properties
*********************************************************************/
@@ -402,6 +449,11 @@ static int olpc_bat_get_property(struct power_supply *psy,
sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
val->strval = bat_serial;
break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ ret = olpc_bat_get_voltage_max_design(val);
+ if (ret)
+ return ret;
+ break;
default:
ret = -EINVAL;
break;
@@ -429,6 +481,7 @@ static enum power_supply_property olpc_xo1_bat_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
/* XO-1.5 does not have ambient temperature property */
@@ -450,6 +503,7 @@ static enum power_supply_property olpc_xo15_bat_props[] = {
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
};
/* EEPROM reading goes completely around the power_supply API, sadly */