#define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */
#define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */
-#define EC_BAT_ACR 0x12
+#define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */
#define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */
#define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */
#define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */
ec_word = be16_to_cpu(ec_word);
val->intval = ec_word * 100 / 256;
break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ ec_word = be16_to_cpu(ec_word);
+ val->intval = ec_word * 6250 / 15;
+ break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
if (ret)
POWER_SUPPLY_PROP_TEMP_AMBIENT,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
};
/* EEPROM reading goes completely around the power_supply API, sadly */
if (!olpc_platform_info.ecver)
return -ENXIO;
- if (olpc_platform_info.ecver < 0x43) {
- printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver);
+
+ /*
+ * We've seen a number of EC protocol changes; this driver requires
+ * the latest EC protocol, supported by 0x44 and above.
+ */
+ if (olpc_platform_info.ecver < 0x44) {
+ printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
+ "battery driver.\n", olpc_platform_info.ecver);
return -ENXIO;
}