[PATCH 2/5] power_supply: add an ERROR property that displays raw errors and use for OLPC

[Andres Salomon <dilinger@collabora.co.uk>]

Grab the error code from EC_BAT_ERRCODE and let the user see it (rather
than attempting to decode it as we do with PROP_HEALTH).

Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
---
 drivers/power/olpc_battery.c       |    8 ++++++++
 drivers/power/power_supply_sysfs.c |    1 +
 include/linux/power_supply.h       |    1 +
 3 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 8f41733..f8d2d6b 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -242,6 +242,13 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		}
 		break;
 
+	case POWER_SUPPLY_PROP_ERROR:
+		ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+		if (ret)
+			return ret;
+		val->intval = ec_byte;
+		break;
+
 	case POWER_SUPPLY_PROP_MANUFACTURER:
 		ret = olpc_bat_get_mfr(val);
 		if (ret)
@@ -319,6 +326,7 @@ static enum power_supply_property olpc_bat_props[] = {
 	POWER_SUPPLY_PROP_CAPACITY,
 	POWER_SUPPLY_PROP_TEMP,
 	POWER_SUPPLY_PROP_TEMP_AMBIENT,
+	POWER_SUPPLY_PROP_ERROR,
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_SERIAL_NUMBER,
 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index da73591..add5f39 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -115,6 +115,7 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(time_to_empty_avg),
 	POWER_SUPPLY_ATTR(time_to_full_now),
 	POWER_SUPPLY_ATTR(time_to_full_avg),
+	POWER_SUPPLY_ATTR(error),
 	/* Properties of type `const char *' */
 	POWER_SUPPLY_ATTR(model_name),
 	POWER_SUPPLY_ATTR(manufacturer),
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 594c494..1e45cbc 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -95,6 +95,7 @@ enum power_supply_property {
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 	POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
 	POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
+	POWER_SUPPLY_PROP_ERROR,
 	/* Properties of type `const char *' */
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_MANUFACTURER,
-- 
1.5.6.5