diff --git a/arch/arm/boot/dts/omap3-n950-n9.dtsi b/arch/arm/boot/dts/omap3-n950-n9.dtsi
index 6fc1acc..b42a265 100644
--- a/arch/arm/boot/dts/omap3-n950-n9.dtsi
+++ b/arch/arm/boot/dts/omap3-n950-n9.dtsi
@@ -276,6 +276,26 @@
 
 &i2c2 {
 	clock-frequency = <400000>;
+
+	bq27521: bq27521@55 {
+		compatible = "ti,bq27521";
+		reg = <0x55>;
+	};
+
+
+	bq24153a@6b {
+		compatible = "ti,bq24150a";
+ 		reg = <0x6b>;
+
+                ti,current-limit = <100>;
+ 		ti,weak-battery-voltage = <3400>;
+ 		ti,battery-regulation-voltage = <4000>; /* FIXME: 4200 */
+ 		ti,charge-current = <500>; /* FIXME: 650 */
+ 		ti,termination-current = <100>;
+
+		ti,resistor-sense = <68>;
+ 		ti,usb-charger-detection = <&twl_power>;
+	};
 };
 
 &i2c3 {
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index ed44439..4ab2bfc 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -381,6 +381,30 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
 		[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
 		BQ27XXX_DM_REG_ROWS,
 	},
+	[BQ27521] = {				/* FIXME */
+		[BQ27XXX_REG_CTRL] = 0x02,
+		[BQ27XXX_REG_TEMP] = 0x0a,
+		[BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_VOLT] = 0x0c,
+		[BQ27XXX_REG_AI] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_FLAGS] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_NAC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_FCC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_AE] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_SOC] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
+		[BQ27XXX_REG_AP] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
+		[BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
+	},
 	[BQ27530] = {
 		[BQ27XXX_REG_CTRL] = 0x00,
 		[BQ27XXX_REG_TEMP] = 0x06,
@@ -700,6 +724,15 @@ static enum power_supply_property bq27520g4_battery_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 };
 
+static enum power_supply_property bq27521_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+};
+
 static enum power_supply_property bq27530_battery_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_PRESENT,
@@ -792,6 +825,7 @@ static struct {
 	BQ27XXX_PROP(BQ27520G2, bq27520g2_battery_props),
 	BQ27XXX_PROP(BQ27520G3, bq27520g3_battery_props),
 	BQ27XXX_PROP(BQ27520G4, bq27520g4_battery_props),
+	BQ27XXX_PROP(BQ27521, bq27521_battery_props),
 	BQ27XXX_PROP(BQ27530, bq27530_battery_props),
 	BQ27XXX_PROP(BQ27541, bq27541_battery_props),
 	BQ27XXX_PROP(BQ27545, bq27545_battery_props),
@@ -1529,6 +1563,7 @@ static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
 	case BQ27520G2:
 	case BQ27520G3:
 	case BQ27520G4:
+	case BQ27521:
 	case BQ27541:
 	case BQ27545:
 		return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
@@ -1594,6 +1629,11 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 	bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
 	bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
 
+	if (di->chip == BQ27521) {
+		di->cache.flags = 0;
+		return;
+	}
+
 	cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
 	if ((cache.flags & 0xff) == 0xff)
 		cache.flags = -1; /* read error */
@@ -1792,11 +1832,14 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
 	if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
 		return -ENODEV;
 
+	printk("bq27: get property %d\n", psp);
+
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
 		ret = bq27xxx_battery_status(di, val);
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		printk("bq27: get voltage\n");
 		ret = bq27xxx_battery_voltage(di, val);
 		break;
 	case POWER_SUPPLY_PROP_PRESENT:
@@ -1998,8 +2041,12 @@ static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, di);
 
+	printk("bq27: probe\n");
 	di->dev = &pdev->dev;
 	di->chip = pdata->chip;
+	printk("bq27: probe chip %d\n", di->chip);
+	di->chip = BQ27521;
+	printk("bq27: probe chip %d\n", di->chip);	
 	di->name = pdata->name ?: dev_name(&pdev->dev);
 	di->bus.read = bq27xxx_battery_platform_read;
 
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index a597221..fd9b989 100644
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -239,6 +239,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
 	{ "bq27520g2", BQ27520G2 },
 	{ "bq27520g3", BQ27520G3 },
 	{ "bq27520g4", BQ27520G4 },
+	{ "bq27521", BQ27521 },
 	{ "bq27530", BQ27530 },
 	{ "bq27531", BQ27530 },
 	{ "bq27541", BQ27541 },
@@ -269,6 +270,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
 	{ .compatible = "ti,bq27520g2" },
 	{ .compatible = "ti,bq27520g3" },
 	{ .compatible = "ti,bq27520g4" },
+	{ .compatible = "ti,bq27521" },
 	{ .compatible = "ti,bq27530" },
 	{ .compatible = "ti,bq27531" },
 	{ .compatible = "ti,bq27541" },
diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
index 11e1168..1e80931 100644
--- a/include/linux/power/bq27xxx_battery.h
+++ b/include/linux/power/bq27xxx_battery.h
@@ -14,6 +14,7 @@ enum bq27xxx_chip {
 	BQ27520G2, /* bq27520G2 */
 	BQ27520G3, /* bq27520G3 */
 	BQ27520G4, /* bq27520G4 */
+	BQ27521, /* bq27521 */	
 	BQ27530, /* bq27530, bq27531 */
 	BQ27541, /* bq27541, bq27542, bq27546, bq27742 */
 	BQ27545, /* bq27545 */
