[PATCH] smsc47m192: New hwmon driver for SMSC LPC47M192/997

New driver (smsc47m192) which supports voltage and temperature
measurement features of SMSC LPC47M192 and LPC47M997 chips.

Signed-off-by: Hartmut Rick <linux@rick.claranet.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 671 insertions, 1 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index a6a8d66129b3..9cf3d9c5962f 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -333,11 +333,32 @@ config SENSORS_SMSC47M1
         help
           If you say yes here you get support for the integrated fan
           monitoring and control capabilities of the SMSC LPC47B27x,
-          LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x and LPC47M192 chips.
+          LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x, LPC47M192 and
+          LPC47M997 chips.
+
+          The temperature and voltage sensor features of the LPC47M192
+          and LPC47M997 are supported by another driver, select also
+          "SMSC LPC47M192 and compatibles" below for those.
 
           This driver can also be built as a module.  If so, the module
           will be called smsc47m1.
 
+config SENSORS_SMSC47M192
+        tristate "SMSC LPC47M192 and compatibles"
+        depends on HWMON && I2C && EXPERIMENTAL
+        select HWMON_VID
+        help
+          If you say yes here you get support for the temperature and
+          voltage sensors of the SMSC LPC47M192 and LPC47M997 chips.
+
+          The fan monitoring and control capabilities of these chips
+          are supported by another driver, select
+          "SMSC LPC47M10x and compatibles" above. You need both drivers
+          if you want fan control and voltage/temperature sensor support.
+
+          This driver can also be built as a module.  If so, the module
+          will be called smsc47m192.
+
 config SENSORS_SMSC47B397
         tristate "SMSC LPC47B397-NC"
         depends on HWMON && I2C && EXPERIMENTAL
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index fbdb8d911a72..d0904593c9ea 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_SENSORS_PC87360)	+= pc87360.o
 obj-$(CONFIG_SENSORS_SIS5595)   += sis5595.o
 obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
 obj-$(CONFIG_SENSORS_SMSC47M1)  += smsc47m1.o
+obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
 obj-$(CONFIG_SENSORS_VIA686A)   += via686a.o
 obj-$(CONFIG_SENSORS_VT8231)    += vt8231.o
 obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o
diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
new file mode 100644
index 000000000000..bdc4570acf9a
--- /dev/null
+++ b/drivers/hwmon/smsc47m192.c
@@ -0,0 +1,648 @@
+/*
+    smsc47m192.c - Support for hardware monitoring block of
+                   SMSC LPC47M192 and LPC47M997 Super I/O chips
+
+    Copyright (C) 2006  Hartmut Rick <linux@rick.claranet.de>
+
+    Derived from lm78.c and other chip drivers.
+
+    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.
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(smsc47m192);
+
+/* SMSC47M192 registers */
+#define SMSC47M192_REG_IN(nr)           ((nr)<6 ? (0x20 + (nr)) : \
+                                        (0x50 + (nr) - 6))
+#define SMSC47M192_REG_IN_MAX(nr)       ((nr)<6 ? (0x2b + (nr) * 2) : \
+                                        (0x54 + (((nr) - 6) * 2)))
+#define SMSC47M192_REG_IN_MIN(nr)       ((nr)<6 ? (0x2c + (nr) * 2) : \
+                                        (0x55 + (((nr) - 6) * 2)))
+static u8 SMSC47M192_REG_TEMP[3] =      { 0x27, 0x26, 0x52 };
+static u8 SMSC47M192_REG_TEMP_MAX[3] =  { 0x39, 0x37, 0x58 };
+static u8 SMSC47M192_REG_TEMP_MIN[3] =  { 0x3A, 0x38, 0x59 };
+#define SMSC47M192_REG_TEMP_OFFSET(nr)  ((nr)==2 ? 0x1e : 0x1f)
+#define SMSC47M192_REG_ALARM1           0x41
+#define SMSC47M192_REG_ALARM2           0x42
+#define SMSC47M192_REG_VID              0x47
+#define SMSC47M192_REG_VID4             0x49
+#define SMSC47M192_REG_CONFIG           0x40
+#define SMSC47M192_REG_SFR              0x4f
+#define SMSC47M192_REG_COMPANY_ID       0x3e
+#define SMSC47M192_REG_VERSION          0x3f
+
+/* generalised scaling with integer rounding */
+static inline int SCALE(long val, int mul, int div)
+{
+        if (val < 0)
+                return (val * mul - div / 2) / div;
+        else
+                return (val * mul + div / 2) / div;
+}
+
+/* Conversions */
+
+/* smsc47m192 internally scales voltage measurements */
+static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
+
+static inline unsigned int IN_FROM_REG(u8 reg, int n)
+{
+        return SCALE(reg, nom_mv[n], 192);
+}
+
+static inline u8 IN_TO_REG(unsigned long val, int n)
+{
+        return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
+}
+
+/* TEMP: 0.001 degC units (-128C to +127C)
+   REG: 1C/bit, two's complement */
+static inline s8 TEMP_TO_REG(int val)
+{
+        return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
+}
+
+static inline int TEMP_FROM_REG(s8 val)
+{
+        return val * 1000;
+}
+
+struct smsc47m192_data {
+        struct i2c_client client;
+        struct class_device *class_dev;
+        struct semaphore update_lock;
+        char valid;             /* !=0 if following fields are valid */
+        unsigned long last_updated;     /* In jiffies */
+
+        u8 in[8];               /* Register value */
+        u8 in_max[8];           /* Register value */
+        u8 in_min[8];           /* Register value */
+        s8 temp[3];             /* Register value */
+        s8 temp_max[3];         /* Register value */
+        s8 temp_min[3];         /* Register value */
+        s8 temp_offset[3];      /* Register value */
+        u16 alarms;             /* Register encoding, combined */
+        u8 vid;                 /* Register encoding, combined */
+        u8 vrm;
+};
+
+static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
+static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
+                int kind);
+static int smsc47m192_detach_client(struct i2c_client *client);
+static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
+
+static struct i2c_driver smsc47m192_driver = {
+        .driver = {
+                .name   = "smsc47m192",
+        },
+        .attach_adapter = smsc47m192_attach_adapter,
+        .detach_client  = smsc47m192_detach_client,
+};
+
+/* Voltages */
+static ssize_t show_in(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
+}
+
+static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
+}
+
+static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
+}
+
+static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        unsigned long val = simple_strtoul(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->in_min[nr] = IN_TO_REG(val, nr);
+        i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
+                                                        data->in_min[nr]);
+        up(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        unsigned long val = simple_strtoul(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->in_max[nr] = IN_TO_REG(val, nr);
+        i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
+                                                        data->in_max[nr]);
+        up(&data->update_lock);
+        return count;
+}
+
+#define show_in_offset(offset)                                  \
+static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
+                show_in, NULL, offset);                         \
+static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
+                show_in_min, set_in_min, offset);               \
+static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
+                show_in_max, set_in_max, offset);
+
+show_in_offset(0)
+show_in_offset(1)
+show_in_offset(2)
+show_in_offset(3)
+show_in_offset(4)
+show_in_offset(5)
+show_in_offset(6)
+show_in_offset(7)
+
+/* Temperatures */
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
+}
+
+static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
+}
+
+static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        long val = simple_strtol(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->temp_min[nr] = TEMP_TO_REG(val);
+        i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
+                                                data->temp_min[nr]);
+        up(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        long val = simple_strtol(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->temp_max[nr] = TEMP_TO_REG(val);
+        i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
+                                                data->temp_max[nr]);
+        up(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_temp_offset(struct device *dev, struct device_attribute
+                *attr, char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
+}
+
+static ssize_t set_temp_offset(struct device *dev, struct device_attribute
+                *attr, const char *buf, size_t count)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
+        long val = simple_strtol(buf, NULL, 10);
+
+        down(&data->update_lock);
+        data->temp_offset[nr] = TEMP_TO_REG(val);
+        if (nr>1)
+                i2c_smbus_write_byte_data(client,
+                        SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
+        else if (data->temp_offset[nr] != 0) {
+                /* offset[0] and offset[1] share the same register,
+                        SFR bit 4 activates offset[0] */
+                i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
+                                        (sfr & 0xef) | (nr==0 ? 0x10 : 0));
+                data->temp_offset[1-nr] = 0;
+                i2c_smbus_write_byte_data(client,
+                        SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
+        } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
+                i2c_smbus_write_byte_data(client,
+                                        SMSC47M192_REG_TEMP_OFFSET(nr), 0);
+        up(&data->update_lock);
+        return count;
+}
+
+#define show_temp_index(index)                                          \
+static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO,                 \
+                show_temp, NULL, index-1);                              \
+static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR,         \
+                show_temp_min, set_temp_min, index-1);                  \
+static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR,         \
+                show_temp_max, set_temp_max, index-1);                  \
+static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR,      \
+                show_temp_offset, set_temp_offset, index-1);
+
+show_temp_index(1)
+show_temp_index(2)
+show_temp_index(3)
+
+/* VID */
+static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%d\n", data->vrm);
+}
+
+static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        data->vrm = simple_strtoul(buf, NULL, 10);
+        return count;
+}
+static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
+
+/* Alarms */
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+        int nr = sensor_attr->index;
+        struct smsc47m192_data *data = smsc47m192_update_device(dev);
+        return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
+static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
+static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
+static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000);
+static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000);
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
+static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
+static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
+static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
+static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
+static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
+
+/* This function is called when:
+    * smsc47m192_driver is inserted (when this module is loaded), for each
+      available adapter
+    * when a new adapter is inserted (and smsc47m192_driver is still present) */
+static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
+{
+        if (!(adapter->class & I2C_CLASS_HWMON))
+                return 0;
+        return i2c_probe(adapter, &addr_data, smsc47m192_detect);
+}
+
+static void smsc47m192_init_client(struct i2c_client *client)
+{
+        int i;
+        u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
+        u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
+
+        /* select cycle mode (pause 1 sec between updates) */
+        i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
+                                                (sfr & 0xfd) | 0x02);
+        if (!(config & 0x01)) {
+                /* initialize alarm limits */
+                for (i=0; i<8; i++) {
+                        i2c_smbus_write_byte_data(client,
+                                SMSC47M192_REG_IN_MIN(i), 0);
+                        i2c_smbus_write_byte_data(client,
+                                SMSC47M192_REG_IN_MAX(i), 0xff);
+                }
+                for (i=0; i<3; i++) {
+                        i2c_smbus_write_byte_data(client,
+                                SMSC47M192_REG_TEMP_MIN[i], 0x80);
+                        i2c_smbus_write_byte_data(client,
+                                SMSC47M192_REG_TEMP_MAX[i], 0x7f);
+                }
+
+                /* start monitoring */
+                i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
+                                                (config & 0xf7) | 0x01);
+        }
+}
+
+/* This function is called by i2c_probe */
+static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
+                int kind)
+{
+        struct i2c_client *client;
+        struct smsc47m192_data *data;
+        int err = 0;
+        int version, config;
+
+        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+                goto exit;
+
+        if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
+                err = -ENOMEM;
+                goto exit;
+        }
+
+        client = &data->client;
+        i2c_set_clientdata(client, data);
+        client->addr = address;
+        client->adapter = adapter;
+        client->driver = &smsc47m192_driver;
+
+        if (kind == 0)
+                kind = smsc47m192;
+
+        /* Detection criteria from sensors_detect script */
+        if (kind < 0) {
+                if (i2c_smbus_read_byte_data(client,
+                                SMSC47M192_REG_COMPANY_ID) == 0x55
+                 && ((version = i2c_smbus_read_byte_data(client,
+                                SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
+                 && (i2c_smbus_read_byte_data(client,
+                                SMSC47M192_REG_VID) & 0x70) == 0x00
+                 && (i2c_smbus_read_byte_data(client,
+                                SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
+                        dev_info(&adapter->dev,
+                                 "found SMSC47M192 or SMSC47M997, "
+                                 "version 2, stepping A%d\n", version & 0x0f);
+                } else {
+                        dev_dbg(&adapter->dev,
+                                "SMSC47M192 detection failed at 0x%02x\n",
+                                address);
+                        goto exit_free;
+                }
+        }
+
+        /* Fill in the remaining client fields and put into the global list */
+        strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
+        data->vrm = vid_which_vrm();
+        init_MUTEX(&data->update_lock);
+
+        /* Tell the I2C layer a new client has arrived */
+        if ((err = i2c_attach_client(client)))
+                goto exit_free;
+
+        /* Initialize the SMSC47M192 chip */
+        smsc47m192_init_client(client);
+
+        /* Register sysfs hooks */
+        data->class_dev = hwmon_device_register(&client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto exit_detach;
+        }
+
+        device_create_file(&client->dev, &sensor_dev_attr_in0_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in0_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in0_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in0_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in1_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in1_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in1_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in1_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in2_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in2_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in2_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in2_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in3_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in3_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in3_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in3_alarm.dev_attr);
+
+        /* Pin 110 is either in4 (+12V) or VID4 */
+        config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
+        if (!(config & 0x20)) {
+                device_create_file(&client->dev,
+                                   &sensor_dev_attr_in4_input.dev_attr);
+                device_create_file(&client->dev,
+                                   &sensor_dev_attr_in4_min.dev_attr);
+                device_create_file(&client->dev,
+                                   &sensor_dev_attr_in4_max.dev_attr);
+                device_create_file(&client->dev,
+                                   &sensor_dev_attr_in4_alarm.dev_attr);
+        }
+        device_create_file(&client->dev, &sensor_dev_attr_in5_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in5_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in5_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in5_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in6_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in6_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in6_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in6_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in7_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in7_min.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in7_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_in7_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp1_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp1_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp1_min.dev_attr);
+        device_create_file(&client->dev,
+                           &sensor_dev_attr_temp1_offset.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp1_alarm.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp2_min.dev_attr);
+        device_create_file(&client->dev,
+                           &sensor_dev_attr_temp2_offset.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr);
+        device_create_file(&client->dev,
+                           &sensor_dev_attr_temp2_input_fault.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp3_input.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp3_max.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp3_min.dev_attr);
+        device_create_file(&client->dev,
+                           &sensor_dev_attr_temp3_offset.dev_attr);
+        device_create_file(&client->dev, &sensor_dev_attr_temp3_alarm.dev_attr);
+        device_create_file(&client->dev,
+                           &sensor_dev_attr_temp3_input_fault.dev_attr);
+        device_create_file(&client->dev, &dev_attr_cpu0_vid);
+        device_create_file(&client->dev, &dev_attr_vrm);
+
+        return 0;
+
+exit_detach:
+        i2c_detach_client(client);
+exit_free:
+        kfree(data);
+exit:
+        return err;
+}
+
+static int smsc47m192_detach_client(struct i2c_client *client)
+{
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        int err;
+
+        hwmon_device_unregister(data->class_dev);
+
+        if ((err = i2c_detach_client(client)))
+                return err;
+
+        kfree(data);
+
+        return 0;
+}
+
+static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct smsc47m192_data *data = i2c_get_clientdata(client);
+        int i, config;
+
+        down(&data->update_lock);
+
+        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+         || !data->valid) {
+                u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
+
+                dev_dbg(&client->dev, "Starting smsc47m192 update\n");
+
+                for (i = 0; i <= 7; i++) {
+                        data->in[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_IN(i));
+                        data->in_min[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_IN_MIN(i));
+                        data->in_max[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_IN_MAX(i));
+                }
+                for (i = 0; i < 3; i++) {
+                        data->temp[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_TEMP[i]);
+                        data->temp_max[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_TEMP_MAX[i]);
+                        data->temp_min[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_TEMP_MIN[i]);
+                }
+                for (i = 1; i < 3; i++)
+                        data->temp_offset[i] = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_TEMP_OFFSET(i));
+                /* first offset is temp_offset[0] if SFR bit 4 is set,
+                                        temp_offset[1] otherwise */
+                if (sfr & 0x10) {
+                        data->temp_offset[0] = data->temp_offset[1];
+                        data->temp_offset[1] = 0;
+                } else
+                        data->temp_offset[0] = 0;
+
+                data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
+                            & 0x0f;
+                config = i2c_smbus_read_byte_data(client,
+                                                  SMSC47M192_REG_CONFIG);
+                if (config & 0x20)
+                        data->vid |= (i2c_smbus_read_byte_data(client,
+                                        SMSC47M192_REG_VID4) & 0x01) << 4;
+                data->alarms = i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_ALARM1) |
+                               (i2c_smbus_read_byte_data(client,
+                                                SMSC47M192_REG_ALARM2) << 8);
+
+                data->last_updated = jiffies;
+                data->valid = 1;
+        }
+
+        up(&data->update_lock);
+
+        return data;
+}
+
+static int __init smsc47m192_init(void)
+{
+        return i2c_add_driver(&smsc47m192_driver);
+}
+
+static void __exit smsc47m192_exit(void)
+{
+        i2c_del_driver(&smsc47m192_driver);
+}
+
+MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
+MODULE_DESCRIPTION("SMSC47M192 driver");
+MODULE_LICENSE("GPL");
+
+module_init(smsc47m192_init);
+module_exit(smsc47m192_exit);