aboutsummaryrefslogtreecommitdiff
path: root/drivers/power/olpc_battery.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/power/olpc_battery.c')
-rw-r--r--drivers/power/olpc_battery.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 58e419299cd..8fefe5a7355 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -10,7 +10,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/types.h>
#include <linux/err.h>
+#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/jiffies.h>
@@ -231,6 +233,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
if (ret)
return ret;
break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ if (ec_byte & BAT_STAT_TRICKLE)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ else if (ec_byte & BAT_STAT_CHARGING)
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
BAT_STAT_TRICKLE));
@@ -276,6 +286,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
return ret;
val->intval = ec_byte;
break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else if (ec_byte & BAT_STAT_LOW)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
case POWER_SUPPLY_PROP_TEMP:
ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
if (ret)
@@ -315,12 +333,14 @@ static int olpc_bat_get_property(struct power_supply *psy,
static enum power_supply_property olpc_bat_props[] = {
POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_TEMP_AMBIENT,
POWER_SUPPLY_PROP_MANUFACTURER,
@@ -370,6 +390,29 @@ static struct bin_attribute olpc_bat_eeprom = {
.read = olpc_bat_eeprom_read,
};
+/* Allow userspace to see the specific error value pulled from the EC */
+
+static ssize_t olpc_bat_error_read(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ uint8_t ec_byte;
+ ssize_t ret;
+
+ ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", ec_byte);
+}
+
+static struct device_attribute olpc_bat_error = {
+ .attr = {
+ .name = "error",
+ .mode = S_IRUGO,
+ },
+ .show = olpc_bat_error_read,
+};
+
/*********************************************************************
* Initialisation
*********************************************************************/
@@ -433,8 +476,14 @@ static int __init olpc_bat_init(void)
if (ret)
goto eeprom_failed;
+ ret = device_create_file(olpc_bat.dev, &olpc_bat_error);
+ if (ret)
+ goto error_failed;
+
goto success;
+error_failed:
+ device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
eeprom_failed:
power_supply_unregister(&olpc_bat);
battery_failed:
@@ -447,6 +496,7 @@ success:
static void __exit olpc_bat_exit(void)
{
+ device_remove_file(olpc_bat.dev, &olpc_bat_error);
device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
power_supply_unregister(&olpc_bat);
power_supply_unregister(&olpc_ac);