static int lsmbus_read_byte(struct device *dev, u8 address)
{
	u8 device;

	device = dev->path.i2c.device;
	return do_smbus_read_byte(get_sm_mmio(dev), device, address);
}

static int lsmbus_read_byte(device_t dev, uint8_t address)
{
	unsigned device;
	struct resource *res;

	device = dev->path.i2c.device;
	res = find_resource(get_pbus_smbus(dev)->dev, 0x58);

	return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_read_byte(device_t dev, u8 address)
{
	u16 device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);
	res = find_resource(pbus->dev, 0x20);

	return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_read_byte(device_t dev, uint8_t address)
{
	uint16_t device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);
	res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4);

	return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_read_byte(device_t dev, uint8_t address)
{
    unsigned device;
    struct resource *res;
    struct bus *pbus;

    device = dev->path.i2c.device;
    pbus = get_pbus_smbus(dev);

    res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

    return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_read_byte(device_t dev, u8 address)
{
	u32 device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	if (!amd_sb700_aux_smbus)
		res = find_resource(pbus->dev, PRIMARY_SMBUS_RESOURCE_NUMBER);
	else
		res = find_resource(pbus->dev, AUXILIARY_SMBUS_RESOURCE_NUMBER);

	return do_smbus_read_byte(res->base, device, address);
}

int smbus_read_byte(unsigned device, unsigned address)
{
	return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}

static int spd_read_byte(u32 device, u32 address)
{
	return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}

int smbusx_read_byte(unsigned smb_index, unsigned device,
				   unsigned address)
{
	return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index << 8),
				  device, address);
}

static int w83795_set_bank(u8 bank)
{
	return do_smbus_write_byte(SMBUS_IO_BASE, W83795_DEV, W83795_REG_BANKSEL, bank);
}

static u8 w83795_read(u16 reg)
{
	int ret;

	ret = w83795_set_bank(reg >> 8);
	if (ret < 0) {
		printk(BIOS_DEBUG, "read faild to set bank %x\n", reg >> 8);
		return -1;
	}

	ret = do_smbus_read_byte(SMBUS_IO_BASE, W83795_DEV, reg & 0xff);
	return ret;
}

static u8 w83795_write(u16 reg, u8 value)
{
	int err;

	err = w83795_set_bank(reg >> 8);
	if (err < 0) {
		printk(BIOS_DEBUG, "write faild to set bank %x\n", reg >> 8);
		return -1;
	}

	err = do_smbus_write_byte(SMBUS_IO_BASE, W83795_DEV, reg & 0xff, value);
	return err;

int smbus_read_byte(u8 device, u8 address)
{
	return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}

u8 smbus_read_byte(u32 smbus_dev, u8 addr, u8 offset)
{
	return do_smbus_read_byte(SMBUS_BASE_ADDRESS, addr, offset);
}

static __attribute__((unused)) int smbus_read_byte(u32 device, u32 address)
{
	return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}

int smbus_read_byte(unsigned int device, unsigned int address)
{
	return do_smbus_read_byte(SMBUS_BASE_ADDRESS, device, address);
}