diff --git a/drivers/misc/smsc_hub.c b/drivers/misc/smsc_hub.c
new file mode 100644
index 0000000..bde25d9
--- /dev/null
+++ b/drivers/misc/smsc_hub.c
@@ -0,0 +1,372 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/smsc3503.h>
+#include <linux/module.h>
+#include <mach/msm_xo.h>
+
+#define SMSC3503_I2C_ADDR 0x08
+#define SMSC_GSBI_I2C_BUS_ID 10
+static const unsigned short normal_i2c[] = {
+SMSC3503_I2C_ADDR, I2C_CLIENT_END };
+
+struct hsic_hub {
+	struct regulator *hsic_hub_reg;
+	struct device *dev;
+	struct i2c_client *client;
+	struct msm_xo_voter *xo_handle;
+};
+static struct hsic_hub *smsc_hub;
+
+/* APIs for setting/clearing bits and for reading/writing values */
+static inline int hsic_hub_get_u8(struct i2c_client *client, u8 reg)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0)
+		pr_err("%s:i2c_read8 failed\n", __func__);
+	return ret;
+}
+
+static inline int hsic_hub_get_u16(struct i2c_client *client, u8 reg)
+{
+	int ret;
+
+	ret = i2c_smbus_read_word_data(client, reg);
+	if (ret < 0)
+		pr_err("%s:i2c_read16 failed\n", __func__);
+	return ret;
+}
+
+static inline int hsic_hub_write_word_data(struct i2c_client *client, u8 reg,
+						u16 value)
+{
+	int ret;
+
+	ret = i2c_smbus_write_word_data(client, reg, value);
+	if (ret)
+		pr_err("%s:i2c_write16 failed\n", __func__);
+	return ret;
+}
+
+static inline int hsic_hub_write_byte_data(struct i2c_client *client, u8 reg,
+						u8 value)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, reg, value);
+	if (ret)
+		pr_err("%s:i2c_write_byte_data failed\n", __func__);
+	return ret;
+}
+
+static inline int hsic_hub_set_bits(struct i2c_client *client, u8 reg,
+					u8 value)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0) {
+		pr_err("%s:i2c_read_byte_data failed\n", __func__);
+		return ret;
+	}
+	return i2c_smbus_write_byte_data(client, reg, (ret | value));
+}
+
+static inline int hsic_hub_clear_bits(struct i2c_client *client, u8 reg,
+					u8 value)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0) {
+		pr_err("%s:i2c_read_byte_data failed\n", __func__);
+		return ret;
+	}
+	return i2c_smbus_write_byte_data(client, reg, (ret & ~value));
+}
+
+static int i2c_hsic_hub_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+				     I2C_FUNC_SMBUS_WORD_DATA))
+		return -EIO;
+
+	/* CONFIG_N bit in SP_ILOCK register has to be set before changing
+	 * other registers to change default configuration of hsic hub.
+	 */
+	hsic_hub_set_bits(client, SMSC3503_SP_ILOCK, CONFIG_N);
+
+	/* Can change default configuartion like VID,PID, strings etc
+	 * by writing new values to hsic hub registers.
+	 */
+	hsic_hub_write_word_data(client, SMSC3503_VENDORID, 0x05C6);
+
+	/* CONFIG_N bit in SP_ILOCK register has to be cleared for new
+	 * values in registers to be effective after writing to
+	 * other registers.
+	 */
+	hsic_hub_clear_bits(client, SMSC3503_SP_ILOCK, CONFIG_N);
+
+	return 0;
+}
+
+static int i2c_hsic_hub_remove(struct i2c_client *client)
+{
+	return 0;
+}
+
+static const struct i2c_device_id hsic_hub_id[] = {
+	{"i2c_hsic_hub", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, hsichub_id);
+
+static struct i2c_driver hsic_hub_driver = {
+	.driver = {
+		.name = "i2c_hsic_hub",
+	},
+	.probe    = i2c_hsic_hub_probe,
+	.remove   = i2c_hsic_hub_remove,
+	.id_table = hsic_hub_id,
+};
+
+#define HSIC_HUB_VDD_VOL_MIN	1650000 /* uV */
+#define HSIC_HUB_VDD_VOL_MAX	1950000 /* uV */
+#define HSIC_HUB_VDD_LOAD	36000	/* uA */
+static int __devinit smsc_hub_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	const struct smsc_hub_platform_data *pdata;
+	struct i2c_adapter *i2c_adap;
+	struct i2c_board_info i2c_info;
+
+	if (!pdev->dev.platform_data) {
+		dev_err(&pdev->dev, "No platform data\n");
+		return -ENODEV;
+	}
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata->hub_reset)
+		return -EINVAL;
+
+	smsc_hub = kzalloc(sizeof(*smsc_hub), GFP_KERNEL);
+	if (!smsc_hub)
+		return -ENOMEM;
+
+	smsc_hub->hsic_hub_reg = regulator_get(&pdev->dev, "EXT_HUB_VDDIO");
+	if (IS_ERR(smsc_hub->hsic_hub_reg)) {
+		dev_err(&pdev->dev, "unable to get ext hub vddcx\n");
+		ret = PTR_ERR(smsc_hub->hsic_hub_reg);
+		goto free_mem;
+	}
+
+	ret = gpio_request(pdata->hub_reset, "HSIC_HUB_RESET_GPIO");
+	if (ret < 0) {
+		dev_err(&pdev->dev, "gpio request failed for GPIO%d\n",
+							pdata->hub_reset);
+		goto gpio_req_fail;
+	}
+
+	ret = regulator_set_voltage(smsc_hub->hsic_hub_reg,
+			HSIC_HUB_VDD_VOL_MIN,
+			HSIC_HUB_VDD_VOL_MAX);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to set the voltage"
+				"for hsic hub reg\n");
+		goto reg_set_voltage_fail;
+	}
+
+	ret = regulator_set_optimum_mode(smsc_hub->hsic_hub_reg,
+				HSIC_HUB_VDD_LOAD);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Unable to set optimum mode of regulator:"
+							"VDDCX\n");
+		goto reg_optimum_mode_fail;
+	}
+
+	ret = regulator_enable(smsc_hub->hsic_hub_reg);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to enable ext hub vddcx\n");
+		goto reg_enable_fail;
+	}
+
+	smsc_hub->xo_handle = msm_xo_get(MSM_XO_TCXO_D1, "hsic_hub");
+	if (IS_ERR(smsc_hub->xo_handle)) {
+		dev_err(&pdev->dev, "not able to get the handle"
+					 "for TCXO D1 buffer\n");
+			goto disable_regulator;
+	}
+
+	ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_ON);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to vote for TCXO"
+			"D1 buffer\n");
+		goto xo_vote_fail;
+	}
+
+	gpio_direction_output(pdata->hub_reset, 0);
+	/* Hub reset should be asserted for minimum 2microsec
+	 * before deasserting.
+	 */
+	udelay(5);
+	gpio_direction_output(pdata->hub_reset, 1);
+
+	ret = i2c_add_driver(&hsic_hub_driver);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to add I2C hsic_hub_driver\n");
+		goto i2c_add_fail;
+	}
+	usleep_range(10000, 12000);
+	i2c_adap = i2c_get_adapter(SMSC_GSBI_I2C_BUS_ID);
+
+	if (!i2c_adap) {
+		dev_err(&pdev->dev, "failed to get i2c adapter\n");
+		i2c_del_driver(&hsic_hub_driver);
+		goto i2c_add_fail;
+	}
+
+	memset(&i2c_info, 0, sizeof(struct i2c_board_info));
+	strlcpy(i2c_info.type, "i2c_hsic_hub", I2C_NAME_SIZE);
+
+	smsc_hub->client = i2c_new_probed_device(i2c_adap, &i2c_info,
+						   normal_i2c, NULL);
+	i2c_put_adapter(i2c_adap);
+	if (!smsc_hub->client)
+		dev_err(&pdev->dev, "failed to connect to smsc_hub"
+			 "through I2C\n");
+
+i2c_add_fail:
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+xo_vote_fail:
+	msm_xo_put(smsc_hub->xo_handle);
+disable_regulator:
+	regulator_disable(smsc_hub->hsic_hub_reg);
+reg_enable_fail:
+	regulator_set_optimum_mode(smsc_hub->hsic_hub_reg, 0);
+reg_optimum_mode_fail:
+	regulator_set_voltage(smsc_hub->hsic_hub_reg, 0,
+				HSIC_HUB_VDD_VOL_MIN);
+reg_set_voltage_fail:
+	gpio_free(pdata->hub_reset);
+gpio_req_fail:
+	regulator_put(smsc_hub->hsic_hub_reg);
+free_mem:
+	kfree(smsc_hub);
+
+	return ret;
+}
+
+static int smsc_hub_remove(struct platform_device *pdev)
+{
+	const struct smsc_hub_platform_data *pdata;
+
+	pdata = pdev->dev.platform_data;
+	if (smsc_hub->client) {
+		i2c_unregister_device(smsc_hub->client);
+		smsc_hub->client = NULL;
+		i2c_del_driver(&hsic_hub_driver);
+	}
+	pm_runtime_disable(&pdev->dev);
+	msm_xo_put(smsc_hub->xo_handle);
+
+	regulator_disable(smsc_hub->hsic_hub_reg);
+	regulator_set_optimum_mode(smsc_hub->hsic_hub_reg, 0);
+	regulator_set_voltage(smsc_hub->hsic_hub_reg, 0,
+				HSIC_HUB_VDD_VOL_MIN);
+	gpio_free(pdata->hub_reset);
+	regulator_put(smsc_hub->hsic_hub_reg);
+	kfree(smsc_hub);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int msm_smsc_runtime_idle(struct device *dev)
+{
+	dev_dbg(dev, "SMSC HUB runtime idle\n");
+
+	return 0;
+}
+
+static int smsc_hub_lpm_enter(struct device *dev)
+{
+	int ret;
+
+	ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_OFF);
+	if (ret) {
+		pr_err("%s: failed to devote for TCXO"
+			"D1 buffer%d\n", __func__, ret);
+	}
+	return ret;
+}
+
+static int smsc_hub_lpm_exit(struct device *dev)
+{
+	int ret;
+
+	ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_ON);
+	if (ret) {
+		pr_err("%s: failed to vote for TCXO"
+			"D1 buffer%d\n", __func__, ret);
+	}
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops smsc_hub_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(smsc_hub_lpm_enter, smsc_hub_lpm_exit)
+	SET_RUNTIME_PM_OPS(smsc_hub_lpm_enter, smsc_hub_lpm_exit,
+				msm_smsc_runtime_idle)
+};
+#endif
+
+static struct platform_driver smsc_hub_driver = {
+	.driver = {
+		.name = "msm_smsc_hub",
+		.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm = &smsc_hub_dev_pm_ops,
+#endif
+	},
+	.remove = smsc_hub_remove,
+};
+
+static int __init smsc_hub_init(void)
+{
+	return platform_driver_probe(&smsc_hub_driver, smsc_hub_probe);
+}
+
+static void __exit smsc_hub_exit(void)
+{
+	platform_driver_unregister(&smsc_hub_driver);
+}
+subsys_initcall(smsc_hub_init);
+module_exit(smsc_hub_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("SMSC HSIC HUB driver");