Added missing tegra files.HEADmaster

1 files changed, 823 insertions, 0 deletions

diff --git a/drivers/hwmon/adt7461.c b/drivers/hwmon/adt7461.c
new file mode 100644
index 00000000000..10ea2eb8066
--- /dev/null
+++ b/drivers/hwmon/adt7461.c
@@ -0,0 +1,823 @@
+/*
+ * adt7461.c - Linux kernel modules for hardware
+ *          monitoring
+ * Copyright (C) 2003-2010  Jean Delvare <khali@linux-fr.org>
+ *
+ * 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/regulator/consumer.h>
+#include <linux/i2c.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/adt7461.h>
+
+#define DRIVER_NAME "adt7461"
+
+/*
+ * The ADT7461 registers
+ */
+
+#define ADT7461_REG_R_MAN_ID                    0xFE
+#define ADT7461_REG_R_CHIP_ID                   0xFF
+#define ADT7461_REG_R_CONFIG1                   0x03
+#define ADT7461_REG_W_CONFIG1                   0x09
+#define ADT7461_REG_R_CONVRATE                  0x04
+#define ADT7461_REG_W_CONVRATE                  0x0A
+#define ADT7461_REG_R_STATUS                    0x02
+#define ADT7461_REG_R_LOCAL_TEMP                0x00
+#define ADT7461_REG_R_LOCAL_HIGH                0x05
+#define ADT7461_REG_W_LOCAL_HIGH                0x0B
+#define ADT7461_REG_R_LOCAL_LOW                 0x06
+#define ADT7461_REG_W_LOCAL_LOW                 0x0C
+#define ADT7461_REG_R_LOCAL_CRIT                0x20
+#define ADT7461_REG_W_LOCAL_CRIT                0x20
+#define ADT7461_REG_R_REMOTE_TEMPH              0x01
+#define ADT7461_REG_R_REMOTE_TEMPL              0x10
+#define ADT7461_REG_R_REMOTE_OFFSH              0x11
+#define ADT7461_REG_W_REMOTE_OFFSH              0x11
+#define ADT7461_REG_R_REMOTE_OFFSL              0x12
+#define ADT7461_REG_W_REMOTE_OFFSL              0x12
+#define ADT7461_REG_R_REMOTE_HIGHH              0x07
+#define ADT7461_REG_W_REMOTE_HIGHH              0x0D
+#define ADT7461_REG_R_REMOTE_HIGHL              0x13
+#define ADT7461_REG_W_REMOTE_HIGHL              0x13
+#define ADT7461_REG_R_REMOTE_LOWH               0x08
+#define ADT7461_REG_W_REMOTE_LOWH               0x0E
+#define ADT7461_REG_R_REMOTE_LOWL               0x14
+#define ADT7461_REG_W_REMOTE_LOWL               0x14
+#define ADT7461_REG_R_REMOTE_CRIT               0x19
+#define ADT7461_REG_W_REMOTE_CRIT               0x19
+#define ADT7461_REG_R_TCRIT_HYST                0x21
+#define ADT7461_REG_W_TCRIT_HYST                0x21
+
+/* Configuration Register Bits */
+#define EXTENDED_RANGE_BIT              BIT(2)
+#define THERM2_BIT                      BIT(5)
+#define STANDBY_BIT                     BIT(6)
+#define ALERT_BIT                       BIT(7)
+
+/* Max Temperature Measurements */
+#define EXTENDED_RANGE_OFFSET   64U
+#define STANDARD_RANGE_MAX              127U
+#define EXTENDED_RANGE_MAX              (150U + EXTENDED_RANGE_OFFSET)
+
+/*
+ * Device flags
+ */
+#define ADT7461_FLAG_ADT7461_EXT                0x01    /* ADT7461 extended mode */
+#define ADT7461_FLAG_THERM2                     0x02    /* Pin 6 as Therm2 */
+
+/*
+ * Client data
+ */
+
+struct adt7461_data {
+        struct work_struct work;
+        struct i2c_client *client;
+        struct device *hwmon_dev;
+        struct mutex update_lock;
+        struct regulator *regulator;
+        char valid; /* zero until following fields are valid */
+        unsigned long last_updated; /* in jiffies */
+        int flags;
+
+        u8 config;              /* configuration register value */
+        u8 alert_alarms;        /* Which alarm bits trigger ALERT# */
+
+        /* registers values */
+        s8 temp8[4];    /* 0: local low limit
+                           1: local high limit
+                           2: local critical limit
+                           3: remote critical limit */
+        s16 temp11[5];  /* 0: remote input
+                           1: remote low limit
+                           2: remote high limit
+                           3: remote offset
+                           4: local input */
+        u8 temp_hyst;
+        u8 alarms; /* bitvector */
+        void (*alarm_fn)(bool raised);
+        int irq_gpio;
+};
+
+/*
+ * Conversions
+ */
+
+static inline int temp_from_s8(s8 val)
+{
+        return val * 1000;
+}
+
+static u8 hyst_to_reg(long val)
+{
+        if (val <= 0)
+                return 0;
+        if (val >= 30500)
+                return 31;
+        return (val + 500) / 1000;
+}
+
+/*
+ * ADT7461 attempts to write values that are outside the range
+ * 0 < temp < 127 are treated as the boundary value.
+ *
+ * ADT7461 in "extended mode" operation uses unsigned integers offset by
+ * 64 (e.g., 0 -> -64 degC).  The range is restricted to -64..191 degC.
+ */
+static inline int temp_from_u8(struct adt7461_data *data, u8 val)
+{
+        if (data->flags & ADT7461_FLAG_ADT7461_EXT)
+                return (val - 64) * 1000;
+        else
+                return temp_from_s8(val);
+}
+
+static inline int temp_from_u16(struct adt7461_data *data, u16 val)
+{
+        if (data->flags & ADT7461_FLAG_ADT7461_EXT)
+                return (val - 0x4000) / 64 * 250;
+        else
+                return val / 32 * 125;
+}
+
+static u8 temp_to_u8(struct adt7461_data *data, long val)
+{
+        if (data->flags & ADT7461_FLAG_ADT7461_EXT) {
+                if (val <= -64000)
+                        return 0;
+                if (val >= 191000)
+                        return 0xFF;
+                return (val + 500 + 64000) / 1000;
+        } else {
+                if (val <= 0)
+                        return 0;
+                if (val >= 127000)
+                        return 127;
+                return (val + 500) / 1000;
+        }
+}
+
+static u16 temp_to_u16(struct adt7461_data *data, long val)
+{
+        if (data->flags & ADT7461_FLAG_ADT7461_EXT) {
+                if (val <= -64000)
+                        return 0;
+                if (val >= 191750)
+                        return 0xFFC0;
+                return (val + 64000 + 125) / 250 * 64;
+        } else {
+                if (val <= 0)
+                        return 0;
+                if (val >= 127750)
+                        return 0x7FC0;
+                return (val + 125) / 250 * 64;
+        }
+}
+
+static int adt7461_read_reg(struct i2c_client* client, u8 reg, u8 *value)
+{
+        int err;
+
+        err = i2c_smbus_read_byte_data(client, reg);
+        if (err < 0) {
+                pr_err("adt7461_read_reg:Register %#02x read failed (%d)\n",
+                         reg, err);
+                return err;
+        }
+        *value = err;
+
+        return 0;
+}
+
+static int adt7461_read16(struct i2c_client *client, u8 regh, u8 regl,
+                        u16 *value)
+{
+        int err;
+        u8 oldh, newh, l;
+
+        /*
+         * There is a trick here. We have to read two registers to have the
+         * sensor temperature, but we have to beware a conversion could occur
+         * inbetween the readings. The datasheet says we should either use
+         * the one-shot conversion register, which we don't want to do
+         * (disables hardware monitoring) or monitor the busy bit, which is
+         * impossible (we can't read the values and monitor that bit at the
+         * exact same time). So the solution used here is to read the high
+         * byte once, then the low byte, then the high byte again. If the new
+         * high byte matches the old one, then we have a valid reading. Else
+         * we have to read the low byte again, and now we believe we have a
+         * correct reading.
+         */
+        if ((err = adt7461_read_reg(client, regh, &oldh))
+         || (err = adt7461_read_reg(client, regl, &l))
+         || (err = adt7461_read_reg(client, regh, &newh)))
+                return err;
+        if (oldh != newh) {
+                err = adt7461_read_reg(client, regl, &l);
+                if (err)
+                        return err;
+        }
+        *value = (newh << 8) | l;
+
+        return 0;
+}
+
+static struct adt7461_data *adt7461_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7461_data *data = i2c_get_clientdata(client);
+
+        mutex_lock(&data->update_lock);
+
+        if (time_after(jiffies, data->last_updated + HZ / 2 + HZ / 10)
+         || !data->valid) {
+                u8 h, l;
+
+                adt7461_read_reg(client, ADT7461_REG_R_LOCAL_LOW, &data->temp8[0]);
+                adt7461_read_reg(client, ADT7461_REG_R_LOCAL_HIGH, &data->temp8[1]);
+                adt7461_read_reg(client, ADT7461_REG_R_LOCAL_CRIT, &data->temp8[2]);
+                adt7461_read_reg(client, ADT7461_REG_R_REMOTE_CRIT, &data->temp8[3]);
+                adt7461_read_reg(client, ADT7461_REG_R_TCRIT_HYST, &data->temp_hyst);
+
+                if (adt7461_read_reg(client, ADT7461_REG_R_LOCAL_TEMP, &h) == 0)
+                        data->temp11[4] = h << 8;
+
+                adt7461_read16(client, ADT7461_REG_R_REMOTE_TEMPH,
+                                ADT7461_REG_R_REMOTE_TEMPL, &data->temp11[0]);
+
+                if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_LOWH, &h) == 0) {
+                        data->temp11[1] = h << 8;
+                        if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_LOWL, &l) == 0)
+                                data->temp11[1] |= l;
+                }
+                if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_HIGHH, &h) == 0) {
+                        data->temp11[2] = h << 8;
+                        if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_HIGHL, &l) == 0)
+                                data->temp11[2] |= l;
+                }
+
+                if (adt7461_read_reg(client, ADT7461_REG_R_REMOTE_OFFSH,
+                                        &h) == 0
+                 && adt7461_read_reg(client, ADT7461_REG_R_REMOTE_OFFSL,
+                                        &l) == 0)
+                        data->temp11[3] = (h << 8) | l;
+                adt7461_read_reg(client, ADT7461_REG_R_STATUS, &data->alarms);
+
+                /* Re-enable ALERT# output if relevant alarms are all clear */
+                if (!(data->flags & ADT7461_FLAG_THERM2)
+                 && (data->alarms & data->alert_alarms) == 0) {
+                        u8 config;
+
+                        adt7461_read_reg(client, ADT7461_REG_R_CONFIG1, &config);
+                        if (config & 0x80) {
+                                pr_err("adt7461_update_device:Re-enabling ALERT#\n");
+                                i2c_smbus_write_byte_data(client,
+                                                        ADT7461_REG_W_CONFIG1,
+                                                        config & ~ALERT_BIT);
+                        }
+                }
+
+                data->last_updated = jiffies;
+                data->valid = 1;
+        }
+
+        mutex_unlock(&data->update_lock);
+
+        return data;
+}
+
+/*
+ * Sysfs stuff
+ */
+
+static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
+                          char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct adt7461_data *data = adt7461_update_device(dev);
+        int temp;
+
+        temp = temp_from_u8(data, data->temp8[attr->index]);
+
+        return sprintf(buf, "%d\n", temp);
+}
+
+static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
+                         const char *buf, size_t count)
+{
+        static const u8 reg[4] = {
+                ADT7461_REG_W_LOCAL_LOW,
+                ADT7461_REG_W_LOCAL_HIGH,
+                ADT7461_REG_W_LOCAL_CRIT,
+                ADT7461_REG_W_REMOTE_CRIT,
+        };
+
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        long val = simple_strtol(buf, NULL, 10);
+        int nr = attr->index;
+
+        mutex_lock(&data->update_lock);
+        data->temp8[nr] = temp_to_u8(data, val);
+        i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
+                          char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct adt7461_data *data = adt7461_update_device(dev);
+        int temp;
+
+        temp = temp_from_u16(data, data->temp11[attr->index]);
+
+        return sprintf(buf, "%d\n", temp);
+}
+
+static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
+                          const char *buf, size_t count)
+{
+        static const u8 reg[6] = {
+                ADT7461_REG_W_REMOTE_LOWH,
+                ADT7461_REG_W_REMOTE_LOWL,
+                ADT7461_REG_W_REMOTE_HIGHH,
+                ADT7461_REG_W_REMOTE_HIGHL,
+                ADT7461_REG_W_REMOTE_OFFSH,
+                ADT7461_REG_W_REMOTE_OFFSL,
+        };
+
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        long val = simple_strtol(buf, NULL, 10);
+        int nr = attr->index;
+
+        mutex_lock(&data->update_lock);
+        data->temp11[nr] = temp_to_u16(data, val);
+
+        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
+                                  data->temp11[nr] >> 8);
+        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
+                                  data->temp11[nr] & 0xff);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_temphyst(struct device *dev,
+                struct device_attribute *devattr,
+                char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct adt7461_data *data = adt7461_update_device(dev);
+        int temp;
+
+        temp = temp_from_u8(data, data->temp8[attr->index]);
+
+        return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
+}
+
+static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
+                         const char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        long val = simple_strtol(buf, NULL, 10);
+        int temp;
+
+        mutex_lock(&data->update_lock);
+        temp = temp_from_u8(data, data->temp8[2]);
+        data->temp_hyst = hyst_to_reg(temp - val);
+        i2c_smbus_write_byte_data(client, ADT7461_REG_W_TCRIT_HYST,
+                                  data->temp_hyst);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
+                         char *buf)
+{
+        struct adt7461_data *data = adt7461_update_device(dev);
+        return sprintf(buf, "%d\n", data->alarms);
+}
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute
+                          *devattr, char *buf)
+{
+        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+        struct adt7461_data *data = adt7461_update_device(dev);
+        int bitnr = attr->index;
+
+        return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
+        set_temp8, 0);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
+        set_temp11, 1);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
+        set_temp8, 1);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
+        set_temp11, 2);
+static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
+        set_temp8, 2);
+static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
+        set_temp8, 3);
+static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
+        set_temphyst, 2);
+static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
+        set_temp11, 3);
+
+/* Individual alarm files */
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
+/* Raw alarm file for compatibility */
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static struct attribute *adt7461_attributes[] = {
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_min.dev_attr.attr,
+        &sensor_dev_attr_temp2_min.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp2_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
+
+        &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_fault.dev_attr.attr,
+        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+        &dev_attr_alarms.attr,
+        NULL
+};
+
+static const struct attribute_group adt7461_group = {
+        .attrs = adt7461_attributes,
+};
+
+static void adt7461_work_func(struct work_struct *work)
+{
+        struct adt7461_data *data =
+                        container_of(work, struct adt7461_data, work);
+
+        if (data->alarm_fn) {
+                /* Therm2 line is active low */
+                data->alarm_fn(!gpio_get_value(data->irq_gpio));
+        }
+}
+
+static irqreturn_t adt7461_irq(int irq, void *dev_id)
+{
+        struct adt7461_data *data = dev_id;
+        schedule_work(&data->work);
+
+        return IRQ_HANDLED;
+}
+
+static void adt7461_regulator_enable(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+
+        data->regulator = regulator_get(NULL, "vdd_vcore_temp");
+        if (IS_ERR_OR_NULL(data->regulator)) {
+                pr_err("adt7461_regulator_enable:Couldn't get regulator vdd_vcore_temp\n");
+                data->regulator = NULL;
+        } else {
+                regulator_enable(data->regulator);
+                /* Optimal time to get the regulator turned on
+                 * before initializing adt7461 chip*/
+                mdelay(5);
+        }
+}
+
+static void adt7461_regulator_disable(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        struct regulator *adt7461_reg = data->regulator;
+        int ret;
+
+        if (adt7461_reg) {
+                ret = regulator_is_enabled(adt7461_reg);
+                if (ret > 0)
+                        regulator_disable(adt7461_reg);
+                regulator_put(adt7461_reg);
+        }
+        data->regulator = NULL;
+}
+
+static void adt7461_enable(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+
+        i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1,
+                                  data->config & ~STANDBY_BIT);
+}
+
+static void adt7461_disable(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+
+        i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1,
+                                  data->config | STANDBY_BIT);
+}
+
+static int adt7461_init_client(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        struct adt7461_platform_data *pdata = client->dev.platform_data;
+        u8 config = 0;
+        u8 value;
+        int err;
+
+        if (!pdata || !pdata->supported_hwrev)
+                return -ENODEV;
+
+        data->irq_gpio = -1;
+
+        if (pdata->therm2) {
+                data->flags |= ADT7461_FLAG_THERM2;
+
+                if (gpio_is_valid(pdata->irq_gpio)) {
+                        if (!IS_ERR(gpio_request(pdata->irq_gpio, "adt7461"))) {
+                                gpio_direction_input(pdata->irq_gpio);
+                                data->irq_gpio = pdata->irq_gpio;
+                        }
+                }
+        }
+
+        if (pdata->ext_range)
+                data->flags |= ADT7461_FLAG_ADT7461_EXT;
+
+        adt7461_regulator_enable(client);
+
+        /* Start the conversions. */
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONVRATE,
+                                                        pdata->conv_rate);
+        if (err < 0)
+                goto error;
+
+        /* External temperature h/w shutdown limit */
+        value = temp_to_u8(data, pdata->shutdown_ext_limit * 1000);
+        err = i2c_smbus_write_byte_data(client,
+                                ADT7461_REG_W_REMOTE_CRIT, value);
+        if (err < 0)
+                goto error;
+
+        /* Local temperature h/w shutdown limit */
+        value = temp_to_u8(data, pdata->shutdown_local_limit * 1000);
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_LOCAL_CRIT,
+                                                                value);
+        if (err < 0)
+                goto error;
+
+        /* External Temperature Throttling limit */
+        value = temp_to_u8(data, pdata->throttling_ext_limit * 1000);
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_REMOTE_HIGHH,
+                                                                value);
+        if (err < 0)
+                goto error;
+
+        /* Local Temperature Throttling limit */
+        value = (data->flags & ADT7461_FLAG_ADT7461_EXT) ?
+                                EXTENDED_RANGE_MAX : STANDARD_RANGE_MAX;
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_LOCAL_HIGH,
+                                                                value);
+        if (err < 0)
+                goto error;
+
+        /* Remote channel offset */
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_REMOTE_OFFSH,
+                                                        pdata->offset);
+        if (err < 0)
+                goto error;
+
+        /* THERM hysteresis */
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_TCRIT_HYST,
+                                        pdata->hysteresis);
+        if (err < 0)
+                goto error;
+
+        if (data->flags & ADT7461_FLAG_THERM2) {
+                data->alarm_fn = pdata->alarm_fn;
+                config = (THERM2_BIT | STANDBY_BIT);
+        } else {
+                config = (~ALERT_BIT & ~THERM2_BIT & STANDBY_BIT);
+        }
+
+        err = i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1, config);
+        if (err < 0)
+                goto error;
+
+        data->config = config;
+        return 0;
+
+error:
+        pr_err("adt7461_init_client:Initialization failed!\n");
+        return err;
+}
+
+static int adt7461_init_irq(struct adt7461_data *data)
+{
+        INIT_WORK(&data->work, adt7461_work_func);
+
+        return request_irq(data->client->irq, adt7461_irq, IRQF_TRIGGER_RISING |
+                                IRQF_TRIGGER_FALLING, DRIVER_NAME, data);
+}
+
+static int adt7461_probe(struct i2c_client *new_client,
+                  const struct i2c_device_id *id)
+{
+        struct adt7461_data *data;
+        int err;
+
+        data = kzalloc(sizeof(struct adt7461_data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        data->client = new_client;
+        i2c_set_clientdata(new_client, data);
+        mutex_init(&data->update_lock);
+
+        data->alert_alarms = 0x7c;
+
+        /* Initialize the ADT7461 chip */
+        err = adt7461_init_client(new_client);
+        if (err < 0)
+                goto exit_free;
+
+        if (data->flags & ADT7461_FLAG_THERM2) {
+                err = adt7461_init_irq(data);
+                if (err < 0)
+                        goto exit_free;
+        }
+
+        /* Register sysfs hooks */
+        if ((err = sysfs_create_group(&new_client->dev.kobj, &adt7461_group)))
+                goto exit_free;
+        if ((err = device_create_file(&new_client->dev,
+                        &sensor_dev_attr_temp2_offset.dev_attr)))
+                goto exit_remove_files;
+
+        data->hwmon_dev = hwmon_device_register(&new_client->dev);
+        if (IS_ERR(data->hwmon_dev)) {
+                err = PTR_ERR(data->hwmon_dev);
+                goto exit_remove_files;
+        }
+
+        adt7461_enable(new_client);
+        return 0;
+
+exit_remove_files:
+        sysfs_remove_group(&new_client->dev.kobj, &adt7461_group);
+exit_free:
+        kfree(data);
+        return err;
+}
+
+static int adt7461_remove(struct i2c_client *client)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+
+        if (data->flags & ADT7461_FLAG_THERM2) {
+                free_irq(client->irq, data);
+                cancel_work_sync(&data->work);
+        }
+        if (gpio_is_valid(data->irq_gpio))
+                gpio_free(data->irq_gpio);
+        hwmon_device_unregister(data->hwmon_dev);
+        sysfs_remove_group(&client->dev.kobj, &adt7461_group);
+        device_remove_file(&client->dev,
+                        &sensor_dev_attr_temp2_offset.dev_attr);
+        adt7461_regulator_disable(client);
+
+        kfree(data);
+        return 0;
+}
+
+static void adt7461_alert(struct i2c_client *client, unsigned int flag)
+{
+        struct adt7461_data *data = i2c_get_clientdata(client);
+        u8 config, alarms;
+
+        adt7461_read_reg(client, ADT7461_REG_R_STATUS, &alarms);
+        if ((alarms & 0x7f) == 0) {
+                pr_err("adt7461_alert:Everything OK\n");
+        } else {
+                if (alarms & 0x61)
+                        pr_err("adt7461_alert:temp%d out of range, please check!\n", 1);
+                if (alarms & 0x1a)
+                        pr_err("adt7461_alert:temp%d out of range, please check!\n", 2);
+                if (alarms & 0x04)
+                        pr_err("adt7461_alert:temp%d diode open, please check!\n", 2);
+
+                /* Disable ALERT# output, because these chips don't implement
+                  SMBus alert correctly; they should only hold the alert line
+                  low briefly. */
+                if (!(data->flags & ADT7461_FLAG_THERM2)
+                 && (alarms & data->alert_alarms)) {
+                        pr_err("adt7461_alert:Disabling ALERT#\n");
+                        adt7461_read_reg(client, ADT7461_REG_R_CONFIG1, &config);
+                        i2c_smbus_write_byte_data(client, ADT7461_REG_W_CONFIG1,
+                                        config | ALERT_BIT);
+                }
+        }
+}
+
+#ifdef CONFIG_PM
+static int adt7461_suspend(struct i2c_client *client, pm_message_t state)
+{
+        disable_irq(client->irq);
+        adt7461_disable(client);
+
+        return 0;
+}
+
+static int adt7461_resume(struct i2c_client *client)
+{
+        adt7461_enable(client);
+        enable_irq(client->irq);
+
+        return 0;
+}
+#endif
+
+/*
+ * Driver data
+ */
+static const struct i2c_device_id adt7461_id[] = {
+        { DRIVER_NAME, 0 },
+};
+
+MODULE_DEVICE_TABLE(i2c, adt7461_id);
+
+static struct i2c_driver adt7461_driver = {
+        .class          = I2C_CLASS_HWMON,
+        .driver = {
+                .name   = DRIVER_NAME,
+        },
+        .probe          = adt7461_probe,
+        .remove         = adt7461_remove,
+        .alert          = adt7461_alert,
+        .id_table       = adt7461_id,
+#ifdef CONFIG_PM
+        .suspend        = adt7461_suspend,
+        .resume         = adt7461_resume,
+#endif
+};
+
+static int __init sensors_adt7461_init(void)
+{
+        return i2c_add_driver(&adt7461_driver);
+}
+
+static void __exit sensors_adt7461_exit(void)
+{
+        i2c_del_driver(&adt7461_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("ADT7461 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_adt7461_init);
+module_exit(sensors_adt7461_exit);