diff options
Diffstat (limited to 'drivers/power/olpc_battery.c')
| -rw-r--r-- | drivers/power/olpc_battery.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index 7385092f9bc8..1630add1a6de 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -267,6 +267,55 @@ 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 *********************************************************************/ @@ -401,6 +450,11 @@ 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; @@ -428,6 +482,7 @@ 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 */ @@ -449,6 +504,7 @@ 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 */ |