power_supply: Support serial number in olpc_battery

This adds serial number support to the OLPC battery driver.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index ab1e8289f07f..7524a63a54cb 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -84,6 +84,8 @@ static struct power_supply olpc_ac = {
         .get_property = olpc_ac_get_prop,
 };
 
+static char bat_serial[17]; /* Ick */
+
 /*********************************************************************
  *              Battery properties
  *********************************************************************/
@@ -94,6 +96,7 @@ static int olpc_bat_get_property(struct power_supply *psy,
         int ret = 0;
         int16_t ec_word;
         uint8_t ec_byte;
+        uint64_t ser_buf;
 
         ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
         if (ret)
@@ -241,6 +244,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
                 ec_word = be16_to_cpu(ec_word);
                 val->intval = ec_word * 100 / 256;
                 break;
+        case POWER_SUPPLY_PROP_SERIAL_NUMBER:
+                ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
+                if (ret)
+                        return ret;
+
+                sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
+                val->strval = bat_serial;
+                break;
         default:
                 ret = -EINVAL;
                 break;
@@ -260,6 +271,7 @@ static enum power_supply_property olpc_bat_props[] = {
         POWER_SUPPLY_PROP_TEMP,
         POWER_SUPPLY_PROP_TEMP_AMBIENT,
         POWER_SUPPLY_PROP_MANUFACTURER,
+        POWER_SUPPLY_PROP_SERIAL_NUMBER,
 };
 
 /*********************************************************************