diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index b743312..6f46e27 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -390,6 +390,18 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called bmp085.
 
+config PCH_PHUB
+	tristate "PCH Packet Hub of Intel Topcliff"
+	depends on PCI
+	help
+	  This driver is for PCH(Platform controller Hub) PHUB(Packet Hub) of
+	  Intel Topcliff which is an IOH(Input/Output Hub) for x86 embedded
+	  processor. The Topcliff has MAC address and Option ROM data in SROM.
+	  This driver can access MAC address and Option ROM data in SROM.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called pch_phub.
+
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 42eab95..9f2986b 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -35,3 +35,4 @@
 obj-y				+= cb710/
 obj-$(CONFIG_VMWARE_BALLOON)	+= vmw_balloon.o
 obj-$(CONFIG_ARM_CHARLCD)	+= arm-charlcd.o
+obj-$(CONFIG_PCH_PHUB)		+= pch_phub.o
diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c
new file mode 100644
index 0000000..ed56e4f
--- /dev/null
+++ b/drivers/misc/pch_phub.c
@@ -0,0 +1,717 @@
+/*
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/if_ether.h>
+#include <linux/ctype.h>
+
+#define PHUB_STATUS 0x00		/* Status Register offset */
+#define PHUB_CONTROL 0x04		/* Control Register offset */
+#define PHUB_TIMEOUT 0x05		/* Time out value for Status Register */
+#define PCH_PHUB_ROM_WRITE_ENABLE 0x01	/* Enabling for writing ROM */
+#define PCH_PHUB_ROM_WRITE_DISABLE 0x00	/* Disabling for writing ROM */
+#define PCH_PHUB_ROM_START_ADDR 0x14	/* ROM data area start address offset */
+
+/* MAX number of INT_REDUCE_CONTROL registers */
+#define MAX_NUM_INT_REDUCE_CONTROL_REG 128
+#define PCI_DEVICE_ID_PCH1_PHUB 0x8801
+#define PCH_MINOR_NOS 1
+#define CLKCFG_CAN_50MHZ 0x12000000
+#define CLKCFG_CANCLK_MASK 0xFF000000
+
+/* SROM ACCESS Macro */
+#define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
+
+/* Registers address offset */
+#define PCH_PHUB_ID_REG				0x0000
+#define PCH_PHUB_QUEUE_PRI_VAL_REG		0x0004
+#define PCH_PHUB_RC_QUEUE_MAXSIZE_REG		0x0008
+#define PCH_PHUB_BRI_QUEUE_MAXSIZE_REG		0x000C
+#define PCH_PHUB_COMP_RESP_TIMEOUT_REG		0x0010
+#define PCH_PHUB_BUS_SLAVE_CONTROL_REG		0x0014
+#define PCH_PHUB_DEADLOCK_AVOID_TYPE_REG	0x0018
+#define PCH_PHUB_INTPIN_REG_WPERMIT_REG0	0x0020
+#define PCH_PHUB_INTPIN_REG_WPERMIT_REG1	0x0024
+#define PCH_PHUB_INTPIN_REG_WPERMIT_REG2	0x0028
+#define PCH_PHUB_INTPIN_REG_WPERMIT_REG3	0x002C
+#define PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE	0x0040
+#define CLKCFG_REG_OFFSET			0x500
+
+#define PCH_PHUB_OROM_SIZE 15360
+
+/**
+ * struct pch_phub_reg - PHUB register structure
+ * @phub_id_reg:			PHUB_ID register val
+ * @q_pri_val_reg:			QUEUE_PRI_VAL register val
+ * @rc_q_maxsize_reg:			RC_QUEUE_MAXSIZE register val
+ * @bri_q_maxsize_reg:			BRI_QUEUE_MAXSIZE register val
+ * @comp_resp_timeout_reg:		COMP_RESP_TIMEOUT register val
+ * @bus_slave_control_reg:		BUS_SLAVE_CONTROL_REG register val
+ * @deadlock_avoid_type_reg:		DEADLOCK_AVOID_TYPE register val
+ * @intpin_reg_wpermit_reg0:		INTPIN_REG_WPERMIT register 0 val
+ * @intpin_reg_wpermit_reg1:		INTPIN_REG_WPERMIT register 1 val
+ * @intpin_reg_wpermit_reg2:		INTPIN_REG_WPERMIT register 2 val
+ * @intpin_reg_wpermit_reg3:		INTPIN_REG_WPERMIT register 3 val
+ * @int_reduce_control_reg:		INT_REDUCE_CONTROL registers val
+ * @clkcfg_reg:				CLK CFG register val
+ * @pch_phub_base_address:		Register base address
+ * @pch_phub_extrom_base_address:	external rom base address
+ */
+struct pch_phub_reg {
+	u32 phub_id_reg;
+	u32 q_pri_val_reg;
+	u32 rc_q_maxsize_reg;
+	u32 bri_q_maxsize_reg;
+	u32 comp_resp_timeout_reg;
+	u32 bus_slave_control_reg;
+	u32 deadlock_avoid_type_reg;
+	u32 intpin_reg_wpermit_reg0;
+	u32 intpin_reg_wpermit_reg1;
+	u32 intpin_reg_wpermit_reg2;
+	u32 intpin_reg_wpermit_reg3;
+	u32 int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
+	u32 clkcfg_reg;
+	void __iomem *pch_phub_base_address;
+	void __iomem *pch_phub_extrom_base_address;
+};
+
+/* SROM SPEC for MAC address assignment offset */
+static const int pch_phub_mac_offset[ETH_ALEN] = {0x3, 0x2, 0x1, 0x0, 0xb, 0xa};
+
+static DEFINE_MUTEX(pch_phub_mutex);
+
+/**
+ * pch_phub_read_modify_write_reg() - Reading modifying and writing register
+ * @reg_addr_offset:	Register offset address value.
+ * @data:		Writing value.
+ * @mask:		Mask value.
+ */
+static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
+					   unsigned int reg_addr_offset,
+					   unsigned int data, unsigned int mask)
+{
+	void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
+	iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
+}
+
+/* pch_phub_save_reg_conf - saves register configuration */
+static void pch_phub_save_reg_conf(struct pci_dev *pdev)
+{
+	unsigned int i;
+	struct pch_phub_reg *chip = pci_get_drvdata(pdev);
+
+	void __iomem *p = chip->pch_phub_base_address;
+
+	chip->phub_id_reg = ioread32(p + PCH_PHUB_ID_REG);
+	chip->q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
+	chip->rc_q_maxsize_reg = ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
+	chip->bri_q_maxsize_reg = ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
+	chip->comp_resp_timeout_reg =
+				ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
+	chip->bus_slave_control_reg =
+				ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
+	chip->deadlock_avoid_type_reg =
+				ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
+	chip->intpin_reg_wpermit_reg0 =
+				ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
+	chip->intpin_reg_wpermit_reg1 =
+				ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
+	chip->intpin_reg_wpermit_reg2 =
+				ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
+	chip->intpin_reg_wpermit_reg3 =
+				ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
+	dev_dbg(&pdev->dev, "%s : "
+		"chip->phub_id_reg=%x, "
+		"chip->q_pri_val_reg=%x, "
+		"chip->rc_q_maxsize_reg=%x, "
+		"chip->bri_q_maxsize_reg=%x, "
+		"chip->comp_resp_timeout_reg=%x, "
+		"chip->bus_slave_control_reg=%x, "
+		"chip->deadlock_avoid_type_reg=%x, "
+		"chip->intpin_reg_wpermit_reg0=%x, "
+		"chip->intpin_reg_wpermit_reg1=%x, "
+		"chip->intpin_reg_wpermit_reg2=%x, "
+		"chip->intpin_reg_wpermit_reg3=%x\n", __func__,
+		chip->phub_id_reg,
+		chip->q_pri_val_reg,
+		chip->rc_q_maxsize_reg,
+		chip->bri_q_maxsize_reg,
+		chip->comp_resp_timeout_reg,
+		chip->bus_slave_control_reg,
+		chip->deadlock_avoid_type_reg,
+		chip->intpin_reg_wpermit_reg0,
+		chip->intpin_reg_wpermit_reg1,
+		chip->intpin_reg_wpermit_reg2,
+		chip->intpin_reg_wpermit_reg3);
+	for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
+		chip->int_reduce_control_reg[i] =
+		    ioread32(p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
+		dev_dbg(&pdev->dev, "%s : "
+			"chip->int_reduce_control_reg[%d]=%x\n",
+			__func__, i, chip->int_reduce_control_reg[i]);
+	}
+	chip->clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
+}
+
+/* pch_phub_restore_reg_conf - restore register configuration */
+static void pch_phub_restore_reg_conf(struct pci_dev *pdev)
+{
+	unsigned int i;
+	struct pch_phub_reg *chip = pci_get_drvdata(pdev);
+	void __iomem *p;
+	p = chip->pch_phub_base_address;
+
+	iowrite32(chip->phub_id_reg, p + PCH_PHUB_ID_REG);
+	iowrite32(chip->q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
+	iowrite32(chip->rc_q_maxsize_reg, p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
+	iowrite32(chip->bri_q_maxsize_reg, p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
+	iowrite32(chip->comp_resp_timeout_reg,
+					p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
+	iowrite32(chip->bus_slave_control_reg,
+					p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
+	iowrite32(chip->deadlock_avoid_type_reg,
+					p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
+	iowrite32(chip->intpin_reg_wpermit_reg0,
+					p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
+	iowrite32(chip->intpin_reg_wpermit_reg1,
+					p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
+	iowrite32(chip->intpin_reg_wpermit_reg2,
+					p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
+	iowrite32(chip->intpin_reg_wpermit_reg3,
+					p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
+	dev_dbg(&pdev->dev, "%s : "
+		"chip->phub_id_reg=%x, "
+		"chip->q_pri_val_reg=%x, "
+		"chip->rc_q_maxsize_reg=%x, "
+		"chip->bri_q_maxsize_reg=%x, "
+		"chip->comp_resp_timeout_reg=%x, "
+		"chip->bus_slave_control_reg=%x, "
+		"chip->deadlock_avoid_type_reg=%x, "
+		"chip->intpin_reg_wpermit_reg0=%x, "
+		"chip->intpin_reg_wpermit_reg1=%x, "
+		"chip->intpin_reg_wpermit_reg2=%x, "
+		"chip->intpin_reg_wpermit_reg3=%x\n", __func__,
+		chip->phub_id_reg,
+		chip->q_pri_val_reg,
+		chip->rc_q_maxsize_reg,
+		chip->bri_q_maxsize_reg,
+		chip->comp_resp_timeout_reg,
+		chip->bus_slave_control_reg,
+		chip->deadlock_avoid_type_reg,
+		chip->intpin_reg_wpermit_reg0,
+		chip->intpin_reg_wpermit_reg1,
+		chip->intpin_reg_wpermit_reg2,
+		chip->intpin_reg_wpermit_reg3);
+	for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
+		iowrite32(chip->int_reduce_control_reg[i],
+			p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
+		dev_dbg(&pdev->dev, "%s : "
+			"chip->int_reduce_control_reg[%d]=%x\n",
+			__func__, i, chip->int_reduce_control_reg[i]);
+	}
+
+	iowrite32(chip->clkcfg_reg, p + CLKCFG_REG_OFFSET);
+}
+
+/**
+ * pch_phub_read_serial_rom() - Reading Serial ROM
+ * @offset_address:	Serial ROM offset address to read.
+ * @data:		Read buffer for specified Serial ROM value.
+ */
+static void pch_phub_read_serial_rom(struct pch_phub_reg *chip,
+				     unsigned int offset_address, u8 *data)
+{
+	void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
+								offset_address;
+
+	*data = ioread8(mem_addr);
+}
+
+/**
+ * pch_phub_write_serial_rom() - Writing Serial ROM
+ * @offset_address:	Serial ROM offset address.
+ * @data:		Serial ROM value to write.
+ */
+static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
+				     unsigned int offset_address, u8 data)
+{
+	void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
+					(offset_address & PCH_WORD_ADDR_MASK);
+	int i;
+	unsigned int word_data;
+	unsigned int pos;
+	unsigned int mask;
+	pos = (offset_address % 4) * 8;
+	mask = ~(0xFF << pos);
+
+	iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
+			chip->pch_phub_extrom_base_address + PHUB_CONTROL);
+
+	word_data = ioread32(mem_addr);
+	iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
+
+	i = 0;
+	while (ioread8(chip->pch_phub_extrom_base_address +
+						PHUB_STATUS) != 0x00) {
+		msleep(1);
+		if (i == PHUB_TIMEOUT)
+			return -ETIMEDOUT;
+		i++;
+	}
+
+	iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
+			chip->pch_phub_extrom_base_address + PHUB_CONTROL);
+
+	return 0;
+}
+
+/**
+ * pch_phub_read_serial_rom_val() - Read Serial ROM value
+ * @offset_address:	Serial ROM address offset value.
+ * @data:		Serial ROM value to read.
+ */
+static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
+					 unsigned int offset_address, u8 *data)
+{
+	unsigned int mem_addr;
+
+	mem_addr = PCH_PHUB_ROM_START_ADDR +
+			pch_phub_mac_offset[offset_address];
+
+	pch_phub_read_serial_rom(chip, mem_addr, data);
+}
+
+/**
+ * pch_phub_write_serial_rom_val() - writing Serial ROM value
+ * @offset_address:	Serial ROM address offset value.
+ * @data:		Serial ROM value.
+ */
+static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
+					 unsigned int offset_address, u8 data)
+{
+	int retval;
+	unsigned int mem_addr;
+
+	mem_addr = PCH_PHUB_ROM_START_ADDR +
+			pch_phub_mac_offset[offset_address];
+
+	retval = pch_phub_write_serial_rom(chip, mem_addr, data);
+
+	return retval;
+}
+
+/* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
+ * for Gigabit Ethernet MAC address
+ */
+static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
+{
+	int retval;
+
+	retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
+	retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
+	retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
+	retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
+
+	retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
+	retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
+	retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
+	retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
+
+	retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
+	retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
+	retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
+	retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
+
+	retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
+	retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
+	retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
+	retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
+
+	retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
+	retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
+	retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
+	retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
+
+	retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
+	retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
+	retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
+	retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
+
+	return retval;
+}
+
+/**
+ * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
+ * @offset_address:	Gigabit Ethernet MAC address offset value.
+ * @data:		Buffer of the Gigabit Ethernet MAC address value.
+ */
+static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
+{
+	int i;
+	for (i = 0; i < ETH_ALEN; i++)
+		pch_phub_read_serial_rom_val(chip, i, &data[i]);
+}
+
+/**
+ * pch_phub_write_gbe_mac_addr() - Write MAC address
+ * @offset_address:	Gigabit Ethernet MAC address offset value.
+ * @data:		Gigabit Ethernet MAC address value.
+ */
+static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
+{
+	int retval;
+	int i;
+
+	retval = pch_phub_gbe_serial_rom_conf(chip);
+	if (retval)
+		return retval;
+
+	for (i = 0; i < ETH_ALEN; i++) {
+		retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
+		if (retval)
+			return retval;
+	}
+
+	return retval;
+}
+
+static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
+				 struct bin_attribute *attr, char *buf,
+				 loff_t off, size_t count)
+{
+	unsigned int rom_signature;
+	unsigned char rom_length;
+	unsigned int tmp;
+	unsigned int addr_offset;
+	unsigned int orom_size;
+	int ret;
+	int err;
+
+	struct pch_phub_reg *chip =
+		dev_get_drvdata(container_of(kobj, struct device, kobj));
+
+	ret = mutex_lock_interruptible(&pch_phub_mutex);
+	if (ret) {
+		err = -ERESTARTSYS;
+		goto return_err_nomutex;
+	}
+
+	/* Get Rom signature */
+	pch_phub_read_serial_rom(chip, 0x80, (unsigned char *)&rom_signature);
+	rom_signature &= 0xff;
+	pch_phub_read_serial_rom(chip, 0x81, (unsigned char *)&tmp);
+	rom_signature |= (tmp & 0xff) << 8;
+	if (rom_signature == 0xAA55) {
+		pch_phub_read_serial_rom(chip, 0x82, &rom_length);
+		orom_size = rom_length * 512;
+		if (orom_size < off) {
+			addr_offset = 0;
+			goto return_ok;
+		}
+		if (orom_size < count) {
+			addr_offset = 0;
+			goto return_ok;
+		}
+
+		for (addr_offset = 0; addr_offset < count; addr_offset++) {
+			pch_phub_read_serial_rom(chip, 0x80 + addr_offset + off,
+							 &buf[addr_offset]);
+		}
+	} else {
+		err = -ENODATA;
+		goto return_err;
+	}
+return_ok:
+	mutex_unlock(&pch_phub_mutex);
+	return addr_offset;
+
+return_err:
+	mutex_unlock(&pch_phub_mutex);
+return_err_nomutex:
+	return err;
+}
+
+static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
+				  struct bin_attribute *attr,
+				  char *buf, loff_t off, size_t count)
+{
+	int err;
+	unsigned int addr_offset;
+	int ret;
+	struct pch_phub_reg *chip =
+		dev_get_drvdata(container_of(kobj, struct device, kobj));
+
+	ret = mutex_lock_interruptible(&pch_phub_mutex);
+	if (ret)
+		return -ERESTARTSYS;
+
+	if (off > PCH_PHUB_OROM_SIZE) {
+		addr_offset = 0;
+		goto return_ok;
+	}
+	if (count > PCH_PHUB_OROM_SIZE) {
+		addr_offset = 0;
+		goto return_ok;
+	}
+
+	for (addr_offset = 0; addr_offset < count; addr_offset++) {
+		if (PCH_PHUB_OROM_SIZE < off + addr_offset)
+			goto return_ok;
+
+		ret = pch_phub_write_serial_rom(chip, 0x80 + addr_offset + off,
+						       buf[addr_offset]);
+		if (ret) {
+			err = ret;
+			goto return_err;
+		}
+	}
+
+return_ok:
+	mutex_unlock(&pch_phub_mutex);
+	return addr_offset;
+
+return_err:
+	mutex_unlock(&pch_phub_mutex);
+	return err;
+}
+
+static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	u8 mac[8];
+	struct pch_phub_reg *chip = dev_get_drvdata(dev);
+
+	pch_phub_read_gbe_mac_addr(chip, mac);
+
+	return sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+				mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+}
+
+static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	u8 mac[6];
+	struct pch_phub_reg *chip = dev_get_drvdata(dev);
+
+	if (count != 18)
+		return -EINVAL;
+
+	sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
+		(u32 *)&mac[0], (u32 *)&mac[1], (u32 *)&mac[2], (u32 *)&mac[3],
+		(u32 *)&mac[4], (u32 *)&mac[5]);
+
+	pch_phub_write_gbe_mac_addr(chip, mac);
+
+	return count;
+}
+
+static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
+
+static struct bin_attribute pch_bin_attr = {
+	.attr = {
+		.name = "pch_firmware",
+		.mode = S_IRUGO | S_IWUSR,
+	},
+	.size = PCH_PHUB_OROM_SIZE + 1,
+	.read = pch_phub_bin_read,
+	.write = pch_phub_bin_write,
+};
+
+static int __devinit pch_phub_probe(struct pci_dev *pdev,
+				    const struct pci_device_id *id)
+{
+	int retval;
+
+	int ret;
+	unsigned int rom_size;
+	struct pch_phub_reg *chip;
+
+	chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
+	if (chip == NULL)
+		return -ENOMEM;
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+		"%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
+		goto err_pci_enable_dev;
+	}
+	dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
+		ret);
+
+	ret = pci_request_regions(pdev, KBUILD_MODNAME);
+	if (ret) {
+		dev_err(&pdev->dev,
+		"%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
+		goto err_req_regions;
+	}
+	dev_dbg(&pdev->dev, "%s : "
+		"pci_request_regions returns %d\n", __func__, ret);
+
+	chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
+
+
+	if (chip->pch_phub_base_address == 0) {
+		dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
+		ret = -ENOMEM;
+		goto err_pci_iomap;
+	}
+	dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
+		"in pch_phub_base_address variable is 0x%08x\n", __func__,
+		(unsigned int)chip->pch_phub_base_address);
+	chip->pch_phub_extrom_base_address = pci_map_rom(pdev, &rom_size);
+
+	if (chip->pch_phub_extrom_base_address == 0) {
+		dev_err(&pdev->dev, "%s : pci_map_rom FAILED", __func__);
+		ret = -ENOMEM;
+		goto err_pci_map;
+	}
+	dev_dbg(&pdev->dev, "%s : "
+		"pci_map_rom SUCCESS and value in "
+		"pch_phub_extrom_base_address variable is 0x%08x\n", __func__,
+		(unsigned int)chip->pch_phub_extrom_base_address);
+
+	pci_set_drvdata(pdev, chip);
+
+	retval = sysfs_create_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
+	if (retval)
+		goto err_sysfs_create;
+
+	retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
+	if (retval)
+		goto exit_bin_attr;
+
+	pch_phub_read_modify_write_reg(chip, (unsigned int)CLKCFG_REG_OFFSET,
+					CLKCFG_CAN_50MHZ, CLKCFG_CANCLK_MASK);
+
+	/* set the prefech value */
+	iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
+	/* set the interrupt delay value */
+	iowrite32(0x25, chip->pch_phub_base_address + 0x44);
+
+	return 0;
+exit_bin_attr:
+	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
+
+err_sysfs_create:
+	pci_unmap_rom(pdev, chip->pch_phub_extrom_base_address);
+err_pci_map:
+	pci_iounmap(pdev, chip->pch_phub_base_address);
+err_pci_iomap:
+	pci_release_regions(pdev);
+err_req_regions:
+	pci_disable_device(pdev);
+err_pci_enable_dev:
+	kfree(chip);
+	dev_err(&pdev->dev, "%s returns %d\n", __func__, ret);
+	return ret;
+}
+
+static void __devexit pch_phub_remove(struct pci_dev *pdev)
+{
+	struct pch_phub_reg *chip = pci_get_drvdata(pdev);
+
+	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
+	sysfs_remove_bin_file(&pdev->dev.kobj, &pch_bin_attr);
+	pci_unmap_rom(pdev, chip->pch_phub_extrom_base_address);
+	pci_iounmap(pdev, chip->pch_phub_base_address);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+	kfree(chip);
+}
+
+#ifdef CONFIG_PM
+
+static int pch_phub_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	int ret;
+
+	pch_phub_save_reg_conf(pdev);
+	ret = pci_save_state(pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			" %s -pci_save_state returns %d\n", __func__, ret);
+		return ret;
+	}
+	pci_enable_wake(pdev, PCI_D3hot, 0);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+	return 0;
+}
+
+static int pch_phub_resume(struct pci_dev *pdev)
+{
+	int ret;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+		"%s-pci_enable_device failed(ret=%d) ", __func__, ret);
+		return ret;
+	}
+
+	pci_enable_wake(pdev, PCI_D3hot, 0);
+	pch_phub_restore_reg_conf(pdev);
+
+	return 0;
+}
+#else
+#define pch_phub_suspend NULL
+#define pch_phub_resume NULL
+#endif /* CONFIG_PM */
+
+static struct pci_device_id pch_phub_pcidev_id[] = {
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PCH1_PHUB)},
+	{0,}
+};
+
+static struct pci_driver pch_phub_driver = {
+	.name = "pch_phub",
+	.id_table = pch_phub_pcidev_id,
+	.probe = pch_phub_probe,
+	.remove = __devexit_p(pch_phub_remove),
+	.suspend = pch_phub_suspend,
+	.resume = pch_phub_resume
+};
+
+static int __init pch_phub_pci_init(void)
+{
+	return pci_register_driver(&pch_phub_driver);
+}
+
+static void __exit pch_phub_pci_exit(void)
+{
+	pci_unregister_driver(&pch_phub_driver);
+}
+
+module_init(pch_phub_pci_init);
+module_exit(pch_phub_pci_exit);
+
+MODULE_DESCRIPTION("PCH Packet Hub PCI Driver");
+MODULE_LICENSE("GPL");