i2c: add bus driver for ALI15x3 devices

This is from the i2c CVS tree.

drivers/i2c/busses/Kconfig

@@ -5,6 +5,20 @@
 
 menu "I2C Hardware Sensors Mainboard support"
 
+config I2C_ALI15X3
+	tristate "  ALI 15x3"
+	depends on I2C && I2C_PROC && PCI && EXPERIMENTAL
+	help
+	  If you say yes to this option, support will be included for the
+	  Acer Labs Inc. (ALI) M1514 and M1543 motherboard I2C interfaces.
+
+	  This can also be built as a module.  If so, the module will be
+	  called i2c-ali15x3.
+
+	  You will also need the latest user-space utilties: you can find them
+	  in the lm_sensors package, which you can download at
+	  http://www.lm-sensors.nu
+
 config I2C_AMD756
 	tristate "  AMD 756/766"
 	depends on I2C && I2C_PROC

drivers/i2c/busses/Makefile

@@ -2,5 +2,6 @@
 # Makefile for the kernel hardware sensors bus drivers.
 #
 
+obj-$(CONFIG_I2C_ALI15X3)	+= i2c-ali15x3.o
 obj-$(CONFIG_I2C_AMD756)	+= i2c-amd756.o
 obj-$(CONFIG_I2C_AMD8111)	+= i2c-amd8111.o

drivers/i2c/busses/i2c-ali15x3.c

+/*
+    ali15x3.c - Part of lm_sensors, Linux kernel modules for hardware
+              monitoring
+    Copyright (c) 1999  Frodo Looijaard <frodol@dds.nl> and
+    Philip Edelbrock <phil@netroedge.com> and
+    Mark D. Studebaker <mdsxyz123@yahoo.com>
+
+    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; either version 2 of the License, or
+    (at your option) any later version.
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+    This is the driver for the SMB Host controller on
+    Acer Labs Inc. (ALI) M1541 and M1543C South Bridges.
+
+    The M1543C is a South bridge for desktop systems.
+    The M1533 is a South bridge for portable systems.
+    They are part of the following ALI chipsets:
+       "Aladdin Pro 2": Includes the M1621 Slot 1 North bridge
+       with AGP and 100MHz CPU Front Side bus
+       "Aladdin V": Includes the M1541 Socket 7 North bridge
+       with AGP and 100MHz CPU Front Side bus
+       "Aladdin IV": Includes the M1541 Socket 7 North bridge
+       with host bus up to 83.3 MHz.
+    For an overview of these chips see http://www.acerlabs.com
+
+    The M1533/M1543C devices appear as FOUR separate devices
+    on the PCI bus. An output of lspci will show something similar
+    to the following:
+
+	00:02.0 USB Controller: Acer Laboratories Inc. M5237
+	00:03.0 Bridge: Acer Laboratories Inc. M7101
+	00:07.0 ISA bridge: Acer Laboratories Inc. M1533
+	00:0f.0 IDE interface: Acer Laboratories Inc. M5229
+
+    The SMB controller is part of the 7101 device, which is an
+    ACPI-compliant Power Management Unit (PMU).
+
+    The whole 7101 device has to be enabled for the SMB to work.
+    You can't just enable the SMB alone.
+    The SMB and the ACPI have separate I/O spaces.
+    We make sure that the SMB is enabled. We leave the ACPI alone.
+
+    This driver controls the SMB Host only.
+    The SMB Slave controller on the M15X3 is not enabled.
+
+    This driver does not use interrupts.
+*/
+
+/* Note: we assume there can only be one ALI15X3, with one SMBus interface */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <asm/io.h>
+
+/* ALI15X3 SMBus address offsets */
+#define SMBHSTSTS (0 + ali15x3_smba)
+#define SMBHSTCNT (1 + ali15x3_smba)
+#define SMBHSTSTART (2 + ali15x3_smba)
+#define SMBHSTCMD (7 + ali15x3_smba)
+#define SMBHSTADD (3 + ali15x3_smba)
+#define SMBHSTDAT0 (4 + ali15x3_smba)
+#define SMBHSTDAT1 (5 + ali15x3_smba)
+#define SMBBLKDAT (6 + ali15x3_smba)
+
+/* PCI Address Constants */
+#define SMBCOM    0x004
+#define SMBBA     0x014
+#define SMBATPC   0x05B		/* used to unlock xxxBA registers */
+#define SMBHSTCFG 0x0E0
+#define SMBSLVC   0x0E1
+#define SMBCLK    0x0E2
+#define SMBREV    0x008
+
+/* Other settings */
+#define MAX_TIMEOUT 200		/* times 1/100 sec */
+#define ALI15X3_SMB_IOSIZE 32
+
+/* this is what the Award 1004 BIOS sets them to on a ASUS P5A MB.
+   We don't use these here. If the bases aren't set to some value we
+   tell user to upgrade BIOS and we fail.
+*/
+#define ALI15X3_SMB_DEFAULTBASE 0xE800
+
+/* ALI15X3 address lock bits */
+#define ALI15X3_LOCK	0x06
+
+/* ALI15X3 command constants */
+#define ALI15X3_ABORT      0x02
+#define ALI15X3_T_OUT      0x04
+#define ALI15X3_QUICK      0x00
+#define ALI15X3_BYTE       0x10
+#define ALI15X3_BYTE_DATA  0x20
+#define ALI15X3_WORD_DATA  0x30
+#define ALI15X3_BLOCK_DATA 0x40
+#define ALI15X3_BLOCK_CLR  0x80
+
+/* ALI15X3 status register bits */
+#define ALI15X3_STS_IDLE	0x04
+#define ALI15X3_STS_BUSY	0x08
+#define ALI15X3_STS_DONE	0x10
+#define ALI15X3_STS_DEV		0x20	/* device error */
+#define ALI15X3_STS_COLL	0x40	/* collision or no response */
+#define ALI15X3_STS_TERM	0x80	/* terminated by abort */
+#define ALI15X3_STS_ERR		0xE0	/* all the bad error bits */
+
+
+/* If force_addr is set to anything different from 0, we forcibly enable
+   the device at the given address. */
+static int force_addr = 0;
+MODULE_PARM(force_addr, "i");
+MODULE_PARM_DESC(force_addr,
+		 "Initialize the base address of the i2c controller");
+
+
+static void ali15x3_do_pause(unsigned int amount);
+static int ali15x3_transaction(void);
+
+static unsigned short ali15x3_smba = 0;
+
+/* Detect whether a ALI15X3 can be found, and initialize it, where necessary.
+   Note the differences between kernels with the old PCI BIOS interface and
+   newer kernels with the real PCI interface. In compat.h some things are
+   defined to make the transition easier. */
+int ali15x3_setup(void)
+{
+	u16 a;
+	unsigned char temp;
+
+	struct pci_dev *ALI15X3_dev;
+
+	/* First check whether we can access PCI at all */
+	if (pci_present() == 0) {
+		printk("i2c-ali15x3.o: Error: No PCI-bus found!\n");
+		return -ENODEV;
+	}
+
+	/* Look for the ALI15X3, M7101 device */
+	ALI15X3_dev = NULL;
+	ALI15X3_dev = pci_find_device(PCI_VENDOR_ID_AL,
+				      PCI_DEVICE_ID_AL_M7101, ALI15X3_dev);
+	if (ALI15X3_dev == NULL) {
+		printk("i2c-ali15x3.o: Error: Can't detect ali15x3!\n");
+		return -ENODEV;
+	}
+
+/* Check the following things:
+	- SMB I/O address is initialized
+	- Device is enabled
+	- We can use the addresses
+*/
+
+/* Unlock the register.
+   The data sheet says that the address registers are read-only
+   if the lock bits are 1, but in fact the address registers
+   are zero unless you clear the lock bits.
+*/
+	pci_read_config_byte(ALI15X3_dev, SMBATPC, &temp);
+	if (temp & ALI15X3_LOCK) {
+		temp &= ~ALI15X3_LOCK;
+		pci_write_config_byte(ALI15X3_dev, SMBATPC, temp);
+	}
+
+/* Determine the address of the SMBus area */
+	pci_read_config_word(ALI15X3_dev, SMBBA, &ali15x3_smba);
+	ali15x3_smba &= (0xffff & ~(ALI15X3_SMB_IOSIZE - 1));
+	if (ali15x3_smba == 0 && force_addr == 0) {
+		printk
+		    ("i2c-ali15x3.o: ALI15X3_smb region uninitialized - upgrade BIOS or use force_addr=0xaddr\n");
+		return -ENODEV;
+	}
+
+	if(force_addr)
+		ali15x3_smba = force_addr & ~(ALI15X3_SMB_IOSIZE - 1);
+
+	if (check_region(ali15x3_smba, ALI15X3_SMB_IOSIZE)) {
+		printk
+		    ("i2c-ali15x3.o: ALI15X3_smb region 0x%x already in use!\n",
+		     ali15x3_smba);
+		return -ENODEV;
+	}
+
+	if(force_addr) {
+		printk("i2c-ali15x3.o: forcing ISA address 0x%04X\n", ali15x3_smba);
+		if (PCIBIOS_SUCCESSFUL !=
+		    pci_write_config_word(ALI15X3_dev, SMBBA, ali15x3_smba))
+			return -ENODEV;
+		if (PCIBIOS_SUCCESSFUL !=
+		    pci_read_config_word(ALI15X3_dev, SMBBA, &a))
+			return -ENODEV;
+		if ((a & ~(ALI15X3_SMB_IOSIZE - 1)) != ali15x3_smba) {
+			/* make sure it works */
+			printk("i2c-ali15x3.o: force address failed - not supported?\n");
+			return -ENODEV;
+		}
+	}
+/* check if whole device is enabled */
+	pci_read_config_byte(ALI15X3_dev, SMBCOM, &temp);
+	if ((temp & 1) == 0) {
+		printk("i2c-ali15x3: enabling SMBus device\n");
+		pci_write_config_byte(ALI15X3_dev, SMBCOM, temp | 0x01);
+	}
+
+/* Is SMB Host controller enabled? */
+	pci_read_config_byte(ALI15X3_dev, SMBHSTCFG, &temp);
+	if ((temp & 1) == 0) {
+		printk("i2c-ali15x3: enabling SMBus controller\n");
+		pci_write_config_byte(ALI15X3_dev, SMBHSTCFG, temp | 0x01);
+	}
+
+/* set SMB clock to 74KHz as recommended in data sheet */
+	pci_write_config_byte(ALI15X3_dev, SMBCLK, 0x20);
+
+	/* Everything is happy, let's grab the memory and set things up. */
+	request_region(ali15x3_smba, ALI15X3_SMB_IOSIZE, "ali15x3-smb");
+
+#ifdef DEBUG
+/*
+  The interrupt routing for SMB is set up in register 0x77 in the
+  1533 ISA Bridge device, NOT in the 7101 device.
+  Don't bother with finding the 1533 device and reading the register.
+  if ((....... & 0x0F) == 1)
+     printk("i2c-ali15x3.o: ALI15X3 using Interrupt 9 for SMBus.\n");
+*/
+	pci_read_config_byte(ALI15X3_dev, SMBREV, &temp);
+	printk("i2c-ali15x3.o: SMBREV = 0x%X\n", temp);
+	printk("i2c-ali15x3.o: ALI15X3_smba = 0x%X\n", ali15x3_smba);
+#endif				/* DEBUG */
+
+	return 0;
+}
+
+
+/* Internally used pause function */
+void ali15x3_do_pause(unsigned int amount)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout(amount);
+}
+
+/* Another internally used function */
+int ali15x3_transaction(void)
+{
+	int temp;
+	int result = 0;
+	int timeout = 0;
+
+#ifdef DEBUG
+	printk
+	    ("i2c-ali15x3.o: Transaction (pre): STS=%02x, CNT=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, "
+	     "DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTCNT),
+	     inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
+	     inb_p(SMBHSTDAT1));
+#endif
+
+	/* get status */
+	temp = inb_p(SMBHSTSTS);
+
+	/* Make sure the SMBus host is ready to start transmitting */
+	/* Check the busy bit first */
+	if (temp & ALI15X3_STS_BUSY) {
+/*
+   If the host controller is still busy, it may have timed out in the previous transaction,
+   resulting in a "SMBus Timeout" printk.
+   I've tried the following to reset a stuck busy bit.
+	1. Reset the controller with an ABORT command.
+	   (this doesn't seem to clear the controller if an external device is hung)
+	2. Reset the controller and the other SMBus devices with a T_OUT command.
+	   (this clears the host busy bit if an external device is hung,
+	   but it comes back upon a new access to a device)
+	3. Disable and reenable the controller in SMBHSTCFG
+   Worst case, nothing seems to work except power reset.
+*/
+/* Abort - reset the host controller */
+/*
+#ifdef DEBUG
+    printk("i2c-ali15x3.o: Resetting host controller to clear busy condition\n",temp);
+#endif
+    outb_p(ALI15X3_ABORT, SMBHSTCNT);
+    temp = inb_p(SMBHSTSTS);
+    if (temp & ALI15X3_STS_BUSY) {
+*/
+
+/*
+   Try resetting entire SMB bus, including other devices -
+   This may not work either - it clears the BUSY bit but
+   then the BUSY bit may come back on when you try and use the chip again.
+   If that's the case you are stuck.
+*/
+		printk
+		    ("i2c-ali15x3.o: Resetting entire SMB Bus to clear busy condition (%02x)\n",
+		     temp);
+		outb_p(ALI15X3_T_OUT, SMBHSTCNT);
+		temp = inb_p(SMBHSTSTS);
+	}
+/*
+  }
+*/
+
+	/* now check the error bits and the busy bit */
+	if (temp & (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) {
+		/* do a clear-on-write */
+		outb_p(0xFF, SMBHSTSTS);
+		if ((temp = inb_p(SMBHSTSTS)) &
+		    (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) {
+			/* this is probably going to be correctable only by a power reset
+			   as one of the bits now appears to be stuck */
+			/* This may be a bus or device with electrical problems. */
+			printk
+			    ("i2c-ali15x3.o: SMBus reset failed! (0x%02x) - controller or device on bus is probably hung\n",
+			     temp);
+			return -1;
+		}
+	} else {
+		/* check and clear done bit */
+		if (temp & ALI15X3_STS_DONE) {
+			outb_p(temp, SMBHSTSTS);
+		}
+	}
+
+	/* start the transaction by writing anything to the start register */
+	outb_p(0xFF, SMBHSTSTART);
+
+	/* We will always wait for a fraction of a second! */
+	timeout = 0;
+	do {
+		ali15x3_do_pause(1);
+		temp = inb_p(SMBHSTSTS);
+	} while ((!(temp & (ALI15X3_STS_ERR | ALI15X3_STS_DONE)))
+		 && (timeout++ < MAX_TIMEOUT));
+
+	/* If the SMBus is still busy, we give up */
+	if (timeout >= MAX_TIMEOUT) {
+		result = -1;
+		printk("i2c-ali15x3.o: SMBus Timeout!\n");
+	}
+
+	if (temp & ALI15X3_STS_TERM) {
+		result = -1;
+#ifdef DEBUG
+		printk("i2c-ali15x3.o: Error: Failed bus transaction\n");
+#endif
+	}
+
+/*
+  Unfortunately the ALI SMB controller maps "no response" and "bus collision"
+  into a single bit. No reponse is the usual case so don't
+  do a printk.
+  This means that bus collisions go unreported.
+*/
+	if (temp & ALI15X3_STS_COLL) {
+		result = -1;
+#ifdef DEBUG
+		printk
+		    ("i2c-ali15x3.o: Error: no response or bus collision ADD=%02x\n",
+		     inb_p(SMBHSTADD));
+#endif
+	}
+
+/* haven't ever seen this */
+	if (temp & ALI15X3_STS_DEV) {
+		result = -1;
+		printk("i2c-ali15x3.o: Error: device error\n");
+	}
+#ifdef DEBUG
+	printk
+	    ("i2c-ali15x3.o: Transaction (post): STS=%02x, CNT=%02x, CMD=%02x, ADD=%02x, "
+	     "DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTCNT),
+	     inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
+	     inb_p(SMBHSTDAT1));
+#endif
+	return result;
+}
+
+/* Return -1 on error. */
+s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
+		   unsigned short flags, char read_write, u8 command,
+		   int size, union i2c_smbus_data * data)
+{
+	int i, len;
+	int temp;
+	int timeout;
+
+/* clear all the bits (clear-on-write) */
+	outb_p(0xFF, SMBHSTSTS);
+/* make sure SMBus is idle */
+	temp = inb_p(SMBHSTSTS);
+	for (timeout = 0;
+	     (timeout < MAX_TIMEOUT) && !(temp & ALI15X3_STS_IDLE);
+	     timeout++) {
+		ali15x3_do_pause(1);
+		temp = inb_p(SMBHSTSTS);
+	}
+	if (timeout >= MAX_TIMEOUT) {
+		printk("i2c-ali15x3.o: Idle wait Timeout! STS=0x%02x\n",
+		       temp);
+	}
+
+	switch (size) {
+	case I2C_SMBUS_PROC_CALL:
+		printk
+		    ("i2c-ali15x3.o: I2C_SMBUS_PROC_CALL not supported!\n");
+		return -1;
+	case I2C_SMBUS_QUICK:
+		outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
+		       SMBHSTADD);
+		size = ALI15X3_QUICK;
+		break;
+	case I2C_SMBUS_BYTE:
+		outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
+		       SMBHSTADD);
+		if (read_write == I2C_SMBUS_WRITE)
+			outb_p(command, SMBHSTCMD);
+		size = ALI15X3_BYTE;
+		break;
+	case I2C_SMBUS_BYTE_DATA:
+		outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
+		       SMBHSTADD);
+		outb_p(command, SMBHSTCMD);
+		if (read_write == I2C_SMBUS_WRITE)
+			outb_p(data->byte, SMBHSTDAT0);
+		size = ALI15X3_BYTE_DATA;
+		break;
+	case I2C_SMBUS_WORD_DATA:
+		outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
+		       SMBHSTADD);
+		outb_p(command, SMBHSTCMD);
+		if (read_write == I2C_SMBUS_WRITE) {
+			outb_p(data->word & 0xff, SMBHSTDAT0);
+			outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
+		}
+		size = ALI15X3_WORD_DATA;
+		break;
+	case I2C_SMBUS_BLOCK_DATA:
+		outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
+		       SMBHSTADD);
+		outb_p(command, SMBHSTCMD);
+		if (read_write == I2C_SMBUS_WRITE) {
+			len = data->block[0];
+			if (len < 0) {
+				len = 0;
+				data->block[0] = len;
+			}
+			if (len > 32) {
+				len = 32;
+				data->block[0] = len;
+			}
+			outb_p(len, SMBHSTDAT0);
+			outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT);	/* Reset SMBBLKDAT */
+			for (i = 1; i <= len; i++)
+				outb_p(data->block[i], SMBBLKDAT);
+		}
+		size = ALI15X3_BLOCK_DATA;
+		break;
+	}
+
+	outb_p(size, SMBHSTCNT);	/* output command */
+
+	if (ali15x3_transaction())	/* Error in transaction */
+		return -1;
+
+	if ((read_write == I2C_SMBUS_WRITE) || (size == ALI15X3_QUICK))
+		return 0;
+
+
+	switch (size) {
+	case ALI15X3_BYTE:	/* Result put in SMBHSTDAT0 */
+		data->byte = inb_p(SMBHSTDAT0);
+		break;
+	case ALI15X3_BYTE_DATA:
+		data->byte = inb_p(SMBHSTDAT0);
+		break;
+	case ALI15X3_WORD_DATA:
+		data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
+		break;
+	case ALI15X3_BLOCK_DATA:
+		len = inb_p(SMBHSTDAT0);
+		if (len > 32)
+			len = 32;
+		data->block[0] = len;
+		outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT);	/* Reset SMBBLKDAT */
+		for (i = 1; i <= data->block[0]; i++) {
+			data->block[i] = inb_p(SMBBLKDAT);
+#ifdef DEBUG
+			printk
+			    ("i2c-ali15x3.o: Blk: len=%d, i=%d, data=%02x\n",
+			     len, i, data->block[i]);
+#endif	/* DEBUG */
+		}
+		break;
+	}
+	return 0;
+}
+
+
+u32 ali15x3_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
+	    I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
+	    I2C_FUNC_SMBUS_BLOCK_DATA;
+}
+
+static struct i2c_algorithm smbus_algorithm = {
+	.name		= "Non-I2C SMBus adapter",
+	.id		= I2C_ALGO_SMBUS,
+	.smbus_xfer	= ali15x3_access,
+	.functionality	= ali15x3_func,
+};
+
+static struct i2c_adapter ali15x3_adapter = {
+	.owner		= THIS_MODULE,
+	.name		= "unset",
+	.id		= I2C_ALGO_SMBUS | I2C_HW_SMBUS_ALI15X3,
+	.algo		= &smbus_algorithm,
+};
+
+
+
+static struct pci_device_id ali15x3_ids[] __devinitdata = {
+	{ 0, }
+};
+
+static int __devinit ali15x3_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	if (ali15x3_setup()) {
+		printk
+		    ("i2c-ali15x3.o: ALI15X3 not detected, module not inserted.\n");
+
+		return -ENODEV;
+	}
+
+	sprintf(ali15x3_adapter.name, "SMBus ALI15X3 adapter at %04x",
+		ali15x3_smba);
+	i2c_add_adapter(&ali15x3_adapter);
+}
+
+static void __devexit ali15x3_remove(struct pci_dev *dev)
+{
+	i2c_del_adapter(&ali15x3_adapter);
+}
+
+static struct pci_driver ali15x3_driver = {
+	.name		= "ali15x3 smbus",
+	.id_table	= ali15x3_ids,
+	.probe		= ali15x3_probe,
+	.remove		= __devexit_p(ali15x3_remove),
+};
+
+static int __init i2c_ali15x3_init(void)
+{
+	printk("i2c-ali15x3.o version %s (%s)\n", I2C_VERSION, I2C_DATE);
+	return pci_module_init(&ali15x3_driver);
+}
+
+
+static void __exit i2c_ali15x3_exit(void)
+{
+	pci_unregister_driver(&ali15x3_driver);
+	release_region(ali15x3_smba, ALI15X3_SMB_IOSIZE);
+}
+
+
+
+MODULE_AUTHOR
+    ("Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker <mdsxyz123@yahoo.com>");
+MODULE_DESCRIPTION("ALI15X3 SMBus driver");
+MODULE_LICENSE("GPL");
+
+module_init(i2c_ali15x3_init);
+module_exit(i2c_ali15x3_exit);