olpc_battery: Add support for CHARGE_FULL_DESIGN

Some user space software (read: UPower) uses CHARGE_FULL_DESIGN for internal
calculations. The design capacity of the OLPC batteries is effectively fixed
and only needs to be exported.

Signed-off-by: Sascha Silbe <sascha-pgp@silbe.org>
Signed-off-by: Paul Fox <pgf@laptop.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 0cd4f15e3013..663b73023eaf 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -201,6 +201,54 @@ static int olpc_bat_get_tech(union power_supply_propval *val)
         return ret;
 }
 
+static int olpc_bat_get_charge_full_design(union power_supply_propval *val)
+{
+        uint8_t ec_byte;
+        union power_supply_propval tech;
+        int ret, mfr;
+
+        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 = 3000000*.8;
+                        break;
+                default:
+                        return -EIO;
+                }
+                break;
+
+        case POWER_SUPPLY_TECHNOLOGY_LiFe:
+                switch (mfr) {
+                case 1: /* Gold Peak */
+                        val->intval = 2800000;
+                        break;
+                case 2: /* BYD */
+                        val->intval = 3100000;
+                        break;
+                default:
+                        return -EIO;
+                }
+                break;
+
+        default:
+                return -EIO;
+        }
+
+        return ret;
+}
+
 /*********************************************************************
  *              Battery properties
  *********************************************************************/
@@ -294,6 +342,11 @@ static int olpc_bat_get_property(struct power_supply *psy,
                 else
                         val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
                 break;
+        case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+                ret = olpc_bat_get_charge_full_design(val);
+                if (ret)
+                        return ret;
+                break;
         case POWER_SUPPLY_PROP_TEMP:
                 ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
                 if (ret)
@@ -341,6 +394,7 @@ static enum power_supply_property olpc_xo1_bat_props[] = {
         POWER_SUPPLY_PROP_CURRENT_AVG,
         POWER_SUPPLY_PROP_CAPACITY,
         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+        POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
         POWER_SUPPLY_PROP_TEMP,
         POWER_SUPPLY_PROP_TEMP_AMBIENT,
         POWER_SUPPLY_PROP_MANUFACTURER,