Merge git://git.infradead.org/battery-2.6

* git://git.infradead.org/battery-2.6:
  power_supply: Sharp SL-6000 (tosa) batteries support
  power_supply: fix up CHARGE_COUNTER output to be more precise
  power_supply: add CHARGE_COUNTER property and olpc_battery support for it
  power_supply: bump EC version check that we refuse to run with in olpc_battery
  power_supply: cleanup of the OLPC battery driver
  power_supply: add eeprom dump file to olpc_battery's sysfs
  power_supply: Support serial number in olpc_battery

Documentation/power/power_supply_class.txt

@@ -101,6 +101,10 @@ of charge when battery became full/empty". It also could mean "value of
 charge when battery considered full/empty at given conditions (temperature,
 age)". I.e. these attributes represents real thresholds, not design values.
 
+CHARGE_COUNTER - the current charge counter (in µAh).  This could easily
+be negative; there is no empty or full value.  It is only useful for
+relative, time-based measurements.
+
 ENERGY_FULL, ENERGY_EMPTY - same as above but for energy.
 
 CAPACITY - capacity in percents.

drivers/power/Kconfig

@@ -49,6 +49,13 @@ config BATTERY_OLPC
 	help
 	  Say Y to enable support for the battery on the OLPC laptop.
 
+config BATTERY_TOSA
+	tristate "Sharp SL-6000 (tosa) battery"
+	depends on MACH_TOSA && MFD_TC6393XB
+	help
+	  Say Y to enable support for the battery on the Sharp Zaurus
+	  SL-6000 (tosa) models.
+
 config BATTERY_PALMTX
 	tristate "Palm T|X battery"
 	depends on MACH_PALMTX

drivers/power/Makefile

@@ -20,4 +20,5 @@ obj-$(CONFIG_APM_POWER)		+= apm_power.o
 obj-$(CONFIG_BATTERY_DS2760)	+= ds2760_battery.o
 obj-$(CONFIG_BATTERY_PMU)	+= pmu_battery.o
 obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
+obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
 obj-$(CONFIG_BATTERY_PALMTX)	+= palmtx_battery.o

drivers/power/olpc_battery.c

@@ -19,7 +19,7 @@
 
 #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 */
@@ -84,32 +84,10 @@ static struct power_supply olpc_ac = {
 	.get_property = olpc_ac_get_prop,
 };
 
-/*********************************************************************
- *		Battery properties
- *********************************************************************/
-static int olpc_bat_get_property(struct power_supply *psy,
-				 enum power_supply_property psp,
-				 union power_supply_propval *val)
-{
-	int ret = 0;
-	int16_t ec_word;
-	uint8_t ec_byte;
-
-	ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
-	if (ret)
-		return ret;
+static char bat_serial[17]; /* Ick */
 
-	/* Theoretically there's a race here -- the battery could be
-	   removed immediately after we check whether it's present, and
-	   then we query for some other property of the now-absent battery.
-	   It doesn't matter though -- the EC will return the last-known
-	   information, and it's as if we just ran that _little_ bit faster
-	   and managed to read it out before the battery went away. */
-	if (!(ec_byte & BAT_STAT_PRESENT) && psp != POWER_SUPPLY_PROP_PRESENT)
-		return -ENODEV;
-
-	switch (psp) {
-	case POWER_SUPPLY_PROP_STATUS:
+static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte)
+{
 	if (olpc_platform_info.ecver > 0x44) {
 		if (ec_byte & BAT_STAT_CHARGING)
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
@@ -127,16 +105,16 @@ static int olpc_bat_get_property(struct power_supply *psy,
 			val->intval = POWER_SUPPLY_STATUS_FULL;
 		else /* Not _necessarily_ true but EC doesn't tell all yet */
 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
-			break;
 	}
-	case POWER_SUPPLY_PROP_PRESENT:
-		val->intval = !!(ec_byte & BAT_STAT_PRESENT);
-		break;
 
-	case POWER_SUPPLY_PROP_HEALTH:
-		if (ec_byte & BAT_STAT_DESTROY)
-			val->intval = POWER_SUPPLY_HEALTH_DEAD;
-		else {
+	return 0;
+}
+
+static int olpc_bat_get_health(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
 	ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
 	if (ret)
 		return ret;
@@ -163,12 +141,17 @@ static int olpc_bat_get_property(struct power_supply *psy,
 
 	default:
 		/* Eep. We don't know this failure code */
-				return -EIO;
+		ret = -EIO;
 	}
-		}
-		break;
 
-	case POWER_SUPPLY_PROP_MANUFACTURER:
+	return ret;
+}
+
+static int olpc_bat_get_mfr(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
 	ec_byte = BAT_ADDR_MFR_TYPE;
 	ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 	if (ret)
@@ -185,8 +168,15 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		val->strval = "Unknown";
 		break;
 	}
-		break;
-	case POWER_SUPPLY_PROP_TECHNOLOGY:
+
+	return ret;
+}
+
+static int olpc_bat_get_tech(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
 	ec_byte = BAT_ADDR_MFR_TYPE;
 	ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
 	if (ret)
@@ -203,6 +193,64 @@ static int olpc_bat_get_property(struct power_supply *psy,
 		val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 		break;
 	}
+
+	return ret;
+}
+
+/*********************************************************************
+ *		Battery properties
+ *********************************************************************/
+static int olpc_bat_get_property(struct power_supply *psy,
+				 enum power_supply_property psp,
+				 union power_supply_propval *val)
+{
+	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)
+		return ret;
+
+	/* Theoretically there's a race here -- the battery could be
+	   removed immediately after we check whether it's present, and
+	   then we query for some other property of the now-absent battery.
+	   It doesn't matter though -- the EC will return the last-known
+	   information, and it's as if we just ran that _little_ bit faster
+	   and managed to read it out before the battery went away. */
+	if (!(ec_byte & BAT_STAT_PRESENT) && psp != POWER_SUPPLY_PROP_PRESENT)
+		return -ENODEV;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = olpc_bat_get_status(val, ec_byte);
+		if (ret)
+			return ret;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = !!(ec_byte & BAT_STAT_PRESENT);
+		break;
+
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (ec_byte & BAT_STAT_DESTROY)
+			val->intval = POWER_SUPPLY_HEALTH_DEAD;
+		else {
+			ret = olpc_bat_get_health(val);
+			if (ret)
+				return ret;
+		}
+		break;
+
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		ret = olpc_bat_get_mfr(val);
+		if (ret)
+			return ret;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		ret = olpc_bat_get_tech(val);
+		if (ret)
+			return ret;
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
 		ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
@@ -241,6 +289,22 @@ 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_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)
+			return ret;
+
+		sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
+		val->strval = bat_serial;
+		break;
 	default:
 		ret = -EINVAL;
 		break;
@@ -260,6 +324,50 @@ 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,
+	POWER_SUPPLY_PROP_CHARGE_COUNTER,
+};
+
+/* EEPROM reading goes completely around the power_supply API, sadly */
+
+#define EEPROM_START	0x20
+#define EEPROM_END	0x80
+#define EEPROM_SIZE	(EEPROM_END - EEPROM_START)
+
+static ssize_t olpc_bat_eeprom_read(struct kobject *kobj,
+		struct bin_attribute *attr, char *buf, loff_t off, size_t count)
+{
+	uint8_t ec_byte;
+	int ret, end;
+
+	if (off >= EEPROM_SIZE)
+		return 0;
+	if (off + count > EEPROM_SIZE)
+		count = EEPROM_SIZE - off;
+
+	end = EEPROM_START + off + count;
+	for (ec_byte = EEPROM_START + off; ec_byte < end; ec_byte++) {
+		ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1,
+				&buf[ec_byte - EEPROM_START], 1);
+		if (ret) {
+			printk(KERN_ERR "olpc-battery:  EC command "
+					"EC_BAT_EEPROM @ 0x%x failed -"
+					" %d!\n", ec_byte, ret);
+			return -EIO;
+		}
+	}
+
+	return count;
+}
+
+static struct bin_attribute olpc_bat_eeprom = {
+	.attr = {
+		.name = "eeprom",
+		.mode = S_IRUGO,
+		.owner = THIS_MODULE,
+	},
+	.size = 0,
+	.read = olpc_bat_eeprom_read,
 };
 
 /*********************************************************************
@@ -290,8 +398,14 @@ static int __init olpc_bat_init(void)
 
 	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;
 	}
 
@@ -315,8 +429,14 @@ static int __init olpc_bat_init(void)
 	if (ret)
 		goto battery_failed;
 
+	ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
+	if (ret)
+		goto eeprom_failed;
+
 	goto success;
 
+eeprom_failed:
+	power_supply_unregister(&olpc_bat);
 battery_failed:
 	power_supply_unregister(&olpc_ac);
 ac_failed:
@@ -327,6 +447,7 @@ static int __init olpc_bat_init(void)
 
 static void __exit olpc_bat_exit(void)
 {
+	device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
 	power_supply_unregister(&olpc_bat);
 	power_supply_unregister(&olpc_ac);
 	platform_device_unregister(bat_pdev);

drivers/power/power_supply_sysfs.c

@@ -99,6 +99,7 @@ static struct device_attribute power_supply_attrs[] = {
 	POWER_SUPPLY_ATTR(charge_empty),
 	POWER_SUPPLY_ATTR(charge_now),
 	POWER_SUPPLY_ATTR(charge_avg),
+	POWER_SUPPLY_ATTR(charge_counter),
 	POWER_SUPPLY_ATTR(energy_full_design),
 	POWER_SUPPLY_ATTR(energy_empty_design),
 	POWER_SUPPLY_ATTR(energy_full),

include/linux/power_supply.h

@@ -78,6 +78,7 @@ enum power_supply_property {
 	POWER_SUPPLY_PROP_CHARGE_EMPTY,
 	POWER_SUPPLY_PROP_CHARGE_NOW,
 	POWER_SUPPLY_PROP_CHARGE_AVG,
+	POWER_SUPPLY_PROP_CHARGE_COUNTER,
 	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 	POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
 	POWER_SUPPLY_PROP_ENERGY_FULL,