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authorDarrick J. Wong <djwong@us.ibm.com>2008-02-18 13:33:23 -0800
committerMark M. Hoffman <mhoffman@lightlink.com>2008-02-18 21:51:29 -0500
commit57df46d6d9ccd6ced95f169020f79ae637423087 (patch)
tree7ca14cba0e78cc8f35094e7cc9a8cbd7a715af19 /drivers/hwmon/adt7473.c
parentae770152c801f10a91e5e86597a39b5f9ccf2d0d (diff)
hwmon: New driver for Analog Devices ADT7473 sensor chip
This driver reports voltage, temperature and fan sensor readings on an ADT7473 chip. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers/hwmon/adt7473.c')
-rw-r--r--drivers/hwmon/adt7473.c1157
1 files changed, 1157 insertions, 0 deletions
diff --git a/drivers/hwmon/adt7473.c b/drivers/hwmon/adt7473.c
new file mode 100644
index 000000000000..a3daeefff472
--- /dev/null
+++ b/drivers/hwmon/adt7473.c
@@ -0,0 +1,1157 @@
+/*
+ * A hwmon driver for the Analog Devices ADT7473
+ * Copyright (C) 2007 IBM
+ *
+ * Author: Darrick J. Wong <djwong@us.ibm.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/log2.h>
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x2C, 0x2D, 0x2E, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(adt7473);
+
+/* ADT7473 registers */
+#define ADT7473_REG_BASE_ADDR 0x20
+
+#define ADT7473_REG_VOLT_BASE_ADDR 0x21
+#define ADT7473_REG_VOLT_MAX_ADDR 0x22
+#define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46
+#define ADT7473_REG_VOLT_MIN_MAX_ADDR 0x49
+
+#define ADT7473_REG_TEMP_BASE_ADDR 0x25
+#define ADT7473_REG_TEMP_MAX_ADDR 0x27
+#define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E
+#define ADT7473_REG_TEMP_LIMITS_MAX_ADDR 0x53
+#define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67
+#define ADT7473_REG_TEMP_TMIN_MAX_ADDR 0x69
+#define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A
+#define ADT7473_REG_TEMP_TMAX_MAX_ADDR 0x6C
+
+#define ADT7473_REG_FAN_BASE_ADDR 0x28
+#define ADT7473_REG_FAN_MAX_ADDR 0x2F
+#define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54
+#define ADT7473_REG_FAN_MIN_MAX_ADDR 0x5B
+
+#define ADT7473_REG_PWM_BASE_ADDR 0x30
+#define ADT7473_REG_PWM_MAX_ADDR 0x32
+#define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64
+#define ADT7473_REG_PWM_MIN_MAX_ADDR 0x66
+#define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38
+#define ADT7473_REG_PWM_MAX_MAX_ADDR 0x3A
+#define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C
+#define ADT7473_REG_PWM_BHVR_MAX_ADDR 0x5E
+#define ADT7473_PWM_BHVR_MASK 0xE0
+#define ADT7473_PWM_BHVR_SHIFT 5
+
+#define ADT7473_REG_CFG1 0x40
+#define ADT7473_CFG1_START 0x01
+#define ADT7473_CFG1_READY 0x04
+#define ADT7473_REG_CFG2 0x73
+#define ADT7473_REG_CFG3 0x78
+#define ADT7473_REG_CFG4 0x7D
+#define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08
+#define ADT7473_REG_CFG5 0x7C
+#define ADT7473_CFG5_TEMP_TWOS 0x01
+#define ADT7473_CFG5_TEMP_OFFSET 0x02
+
+#define ADT7473_REG_DEVICE 0x3D
+#define ADT7473_VENDOR 0x41
+#define ADT7473_REG_VENDOR 0x3E
+#define ADT7473_DEVICE 0x73
+#define ADT7473_REG_REVISION 0x3F
+#define ADT7473_REV_68 0x68
+#define ADT7473_REV_69 0x69
+
+#define ADT7473_REG_ALARM1 0x41
+#define ADT7473_VCCP_ALARM 0x02
+#define ADT7473_VCC_ALARM 0x04
+#define ADT7473_R1T_ALARM 0x10
+#define ADT7473_LT_ALARM 0x20
+#define ADT7473_R2T_ALARM 0x40
+#define ADT7473_OOL 0x80
+#define ADT7473_REG_ALARM2 0x42
+#define ADT7473_OVT_ALARM 0x02
+#define ADT7473_FAN1_ALARM 0x04
+#define ADT7473_FAN2_ALARM 0x08
+#define ADT7473_FAN3_ALARM 0x10
+#define ADT7473_FAN4_ALARM 0x20
+#define ADT7473_R1T_SHORT 0x40
+#define ADT7473_R2T_SHORT 0x80
+#define ADT7473_REG_MAX_ADDR 0x80
+
+#define ALARM2(x) ((x) << 8)
+
+#define ADT7473_VOLT_COUNT 2
+#define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x))
+#define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2))
+#define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \
+ ((x) * 2) + 1)
+
+#define ADT7473_TEMP_COUNT 3
+#define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x))
+#define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
+#define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \
+ ((x) * 2) + 1)
+#define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x))
+#define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x))
+
+#define ADT7473_FAN_COUNT 4
+#define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2))
+#define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
+
+#define ADT7473_PWM_COUNT 3
+#define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x))
+#define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x))
+#define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x))
+#define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x))
+
+/* How often do we reread sensors values? (In jiffies) */
+#define SENSOR_REFRESH_INTERVAL (2 * HZ)
+
+/* How often do we reread sensor limit values? (In jiffies) */
+#define LIMIT_REFRESH_INTERVAL (60 * HZ)
+
+/* datasheet says to divide this number by the fan reading to get fan rpm */
+#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
+#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
+#define FAN_PERIOD_INVALID 65535
+#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
+
+struct adt7473_data {
+ struct i2c_client client;
+ struct device *hwmon_dev;
+ struct attribute_group attrs;
+ struct mutex lock;
+ char sensors_valid;
+ char limits_valid;
+ unsigned long sensors_last_updated; /* In jiffies */
+ unsigned long limits_last_updated; /* In jiffies */
+
+ u8 volt[ADT7473_VOLT_COUNT];
+ s8 volt_min[ADT7473_VOLT_COUNT];
+ s8 volt_max[ADT7473_VOLT_COUNT];
+
+ s8 temp[ADT7473_TEMP_COUNT];
+ s8 temp_min[ADT7473_TEMP_COUNT];
+ s8 temp_max[ADT7473_TEMP_COUNT];
+ s8 temp_tmin[ADT7473_TEMP_COUNT];
+ /* This is called the !THERM limit in the datasheet */
+ s8 temp_tmax[ADT7473_TEMP_COUNT];
+
+ u16 fan[ADT7473_FAN_COUNT];
+ u16 fan_min[ADT7473_FAN_COUNT];
+
+ u8 pwm[ADT7473_PWM_COUNT];
+ u8 pwm_max[ADT7473_PWM_COUNT];
+ u8 pwm_min[ADT7473_PWM_COUNT];
+ u8 pwm_behavior[ADT7473_PWM_COUNT];
+
+ u8 temp_twos_complement;
+ u8 temp_offset;
+
+ u16 alarm;
+ u8 max_duty_at_overheat;
+};
+
+static int adt7473_attach_adapter(struct i2c_adapter *adapter);
+static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind);
+static int adt7473_detach_client(struct i2c_client *client);
+
+static struct i2c_driver adt7473_driver = {
+ .driver = {
+ .name = "adt7473",
+ },
+ .attach_adapter = adt7473_attach_adapter,
+ .detach_client = adt7473_detach_client,
+};
+
+/*
+ * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
+ * that the low byte must be read before the high byte.
+ */
+static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
+{
+ u16 foo;
+ foo = i2c_smbus_read_byte_data(client, reg);
+ foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
+ return foo;
+}
+
+static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
+ u16 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
+ && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
+}
+
+static void adt7473_init_client(struct i2c_client *client)
+{
+ int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
+
+ if (!(reg & ADT7473_CFG1_READY)) {
+ dev_err(&client->dev, "Chip not ready.\n");
+ } else {
+ /* start monitoring */
+ i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
+ reg | ADT7473_CFG1_START);
+ }
+}
+
+static struct adt7473_data *adt7473_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ unsigned long local_jiffies = jiffies;
+ u8 cfg;
+ int i;
+
+ mutex_lock(&data->lock);
+ if (time_before(local_jiffies, data->sensors_last_updated +
+ SENSOR_REFRESH_INTERVAL)
+ && data->sensors_valid)
+ goto no_sensor_update;
+
+ for (i = 0; i < ADT7473_VOLT_COUNT; i++)
+ data->volt[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_VOLT(i));
+
+ /* Determine temperature encoding */
+ cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
+ data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
+
+ /*
+ * What does this do? it implies a variable temperature sensor
+ * offset, but the datasheet doesn't say anything about this bit
+ * and other parts of the datasheet imply that "offset64" mode
+ * means that you shift temp values by -64 if the above bit was set.
+ */
+ data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
+
+ for (i = 0; i < ADT7473_TEMP_COUNT; i++)
+ data->temp[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_TEMP(i));
+
+ for (i = 0; i < ADT7473_FAN_COUNT; i++)
+ data->fan[i] = adt7473_read_word_data(client,
+ ADT7473_REG_FAN(i));
+
+ for (i = 0; i < ADT7473_PWM_COUNT; i++)
+ data->pwm[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM(i));
+
+ data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
+ if (data->alarm & ADT7473_OOL)
+ data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
+ ADT7473_REG_ALARM2));
+
+ data->sensors_last_updated = local_jiffies;
+ data->sensors_valid = 1;
+
+no_sensor_update:
+ if (time_before(local_jiffies, data->limits_last_updated +
+ LIMIT_REFRESH_INTERVAL)
+ && data->limits_valid)
+ goto out;
+
+ for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
+ data->volt_min[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_VOLT_MIN(i));
+ data->volt_max[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_VOLT_MAX(i));
+ }
+
+ for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
+ data->temp_min[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_TEMP_MIN(i));
+ data->temp_max[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_TEMP_MAX(i));
+ data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_TEMP_TMIN(i));
+ data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_TEMP_TMAX(i));
+ }
+
+ for (i = 0; i < ADT7473_FAN_COUNT; i++)
+ data->fan_min[i] = adt7473_read_word_data(client,
+ ADT7473_REG_FAN_MIN(i));
+
+ for (i = 0; i < ADT7473_PWM_COUNT; i++) {
+ data->pwm_max[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM_MAX(i));
+ data->pwm_min[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM_MIN(i));
+ data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM_BHVR(i));
+ }
+
+ data->limits_last_updated = local_jiffies;
+ data->limits_valid = 1;
+
+out:
+ mutex_unlock(&data->lock);
+ return data;
+}
+
+/*
+ * On this chip, voltages are given as a count of steps between a minimum
+ * and maximum voltage, not a direct voltage.
+ */
+static const int volt_convert_table[][2] = {
+ {2997, 3},
+ {4395, 4},
+};
+
+static int decode_volt(int volt_index, u8 raw)
+{
+ int cmax = volt_convert_table[volt_index][0];
+ int cmin = volt_convert_table[volt_index][1];
+ return ((raw * (cmax - cmin)) / 255) + cmin;
+}
+
+static u8 encode_volt(int volt_index, int cooked)
+{
+ int cmax = volt_convert_table[volt_index][0];
+ int cmin = volt_convert_table[volt_index][1];
+ u8 x;
+
+ if (cooked > cmax)
+ cooked = cmax;
+ else if (cooked < cmin)
+ cooked = cmin;
+
+ x = ((cooked - cmin) * 255) / (cmax - cmin);
+
+ return x;
+}
+
+static ssize_t show_volt_min(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ decode_volt(attr->index, data->volt_min[attr->index]));
+}
+
+static ssize_t set_volt_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
+
+ mutex_lock(&data->lock);
+ data->volt_min[attr->index] = volt;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
+ volt);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_volt_max(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ decode_volt(attr->index, data->volt_max[attr->index]));
+}
+
+static ssize_t set_volt_max(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
+
+ mutex_lock(&data->lock);
+ data->volt_max[attr->index] = volt;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
+ volt);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+
+ return sprintf(buf, "%d\n",
+ decode_volt(attr->index, data->volt[attr->index]));
+}
+
+/*
+ * This chip can report temperature data either as a two's complement
+ * number in the range -128 to 127, or as an unsigned number that must
+ * be offset by 64.
+ */
+static int decode_temp(struct adt7473_data *data, u8 raw)
+{
+ if (data->temp_twos_complement)
+ return (s8)raw;
+ return raw - 64;
+}
+
+static u8 encode_temp(struct adt7473_data *data, int cooked)
+{
+ if (data->temp_twos_complement)
+ return (cooked & 0xFF);
+ return cooked + 64;
+}
+
+static ssize_t show_temp_min(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ 1000 * decode_temp(data, data->temp_min[attr->index]));
+}
+
+static ssize_t set_temp_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10) / 1000;
+ temp = encode_temp(data, temp);
+
+ mutex_lock(&data->lock);
+ data->temp_min[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_temp_max(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ 1000 * decode_temp(data, data->temp_max[attr->index]));
+}
+
+static ssize_t set_temp_max(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10) / 1000;
+ temp = encode_temp(data, temp);
+
+ mutex_lock(&data->lock);
+ data->temp_max[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ 1000 * decode_temp(data, data->temp[attr->index]));
+}
+
+static ssize_t show_fan_min(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+
+ if (FAN_DATA_VALID(data->fan_min[attr->index]))
+ return sprintf(buf, "%d\n",
+ FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
+ else
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t set_fan_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ if (!temp)
+ return -EINVAL;
+ temp = FAN_RPM_TO_PERIOD(temp);
+
+ mutex_lock(&data->lock);
+ data->fan_min[attr->index] = temp;
+ adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+
+ if (FAN_DATA_VALID(data->fan[attr->index]))
+ return sprintf(buf, "%d\n",
+ FAN_PERIOD_TO_RPM(data->fan[attr->index]));
+ else
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t show_max_duty_at_crit(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n", data->max_duty_at_overheat);
+}
+
+static ssize_t set_max_duty_at_crit(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ u8 reg;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+ temp = temp && 0xFF;
+
+ mutex_lock(&data->lock);
+ data->max_duty_at_overheat = temp;
+ reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
+ if (temp)
+ reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
+ else
+ reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n", data->pwm[attr->index]);
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->lock);
+ data->pwm[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm_max(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
+}
+
+static ssize_t set_pwm_max(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->lock);
+ data->pwm_max[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm_min(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
+}
+
+static ssize_t set_pwm_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->lock);
+ data->pwm_min[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_temp_tmax(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ 1000 * decode_temp(data, data->temp_tmax[attr->index]));
+}
+
+static ssize_t set_temp_tmax(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10) / 1000;
+ temp = encode_temp(data, temp);
+
+ mutex_lock(&data->lock);
+ data->temp_tmax[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_temp_tmin(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ return sprintf(buf, "%d\n",
+ 1000 * decode_temp(data, data->temp_tmin[attr->index]));
+}
+
+static ssize_t set_temp_tmin(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10) / 1000;
+ temp = encode_temp(data, temp);
+
+ mutex_lock(&data->lock);
+ data->temp_tmin[attr->index] = temp;
+ i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
+ temp);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm_enable(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+
+ switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
+ case 3:
+ return sprintf(buf, "0\n");
+ case 7:
+ return sprintf(buf, "1\n");
+ default:
+ return sprintf(buf, "2\n");
+ }
+}
+
+static ssize_t set_pwm_enable(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ u8 reg;
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ switch (temp) {
+ case 0:
+ temp = 3;
+ break;
+ case 1:
+ temp = 7;
+ break;
+ case 2:
+ /* Enter automatic mode with fans off */
+ temp = 4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->lock);
+ reg = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM_BHVR(attr->index));
+ reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
+ (reg & ~ADT7473_PWM_BHVR_MASK);
+ i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
+ reg);
+ data->pwm_behavior[attr->index] = reg;
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm_auto_temp(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adt7473_data *data = adt7473_update_device(dev);
+ int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
+
+ switch (bhvr) {
+ case 3:
+ case 4:
+ case 7:
+ return sprintf(buf, "0\n");
+ case 0:
+ case 1:
+ case 5:
+ case 6:
+ return sprintf(buf, "%d\n", bhvr + 1);
+ case 2:
+ return sprintf(buf, "4\n");
+ }
+ /* shouldn't ever get here */
+ BUG();
+}
+
+static ssize_t set_pwm_auto_temp(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf,
+ size_t count)
+{
+ u8 reg;
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adt7473_data *data = i2c_get_clientdata(client);
+ int temp = simple_strtol(buf, NULL, 10);
+
+ switch (temp) {
+ case 1:
+ case 2:
+ case 6:
+ case 7:
+ temp--;
+ break;
+ case 0:
+ temp = 4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->lock);
+ reg = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_PWM_BHVR(attr->index));
+ reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
+ (reg & ~ADT7473_PWM_BHVR_MASK);
+ i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
+ reg);
+ data->pwm_behavior[attr->index] = reg;
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+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 adt7473_data *data = adt7473_update_device(dev);
+
+ if (data->alarm & attr->index)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+
+static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
+ set_volt_max, 0);
+static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
+ set_volt_max, 1);
+
+static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
+ set_volt_min, 0);
+static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
+ set_volt_min, 1);
+
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
+
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
+ ADT7473_VCCP_ALARM);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
+ ADT7473_VCC_ALARM);
+
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
+ set_temp_max, 0);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
+ set_temp_max, 1);
+static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
+ set_temp_max, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
+ set_temp_min, 0);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
+ set_temp_min, 1);
+static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
+ set_temp_min, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
+ ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
+static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
+ ADT7473_LT_ALARM);
+static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
+ ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
+
+static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
+ set_fan_min, 0);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
+ set_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
+ set_fan_min, 2);
+static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
+ set_fan_min, 3);
+
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
+ ALARM2(ADT7473_FAN1_ALARM));
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
+ ALARM2(ADT7473_FAN2_ALARM));
+static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
+ ALARM2(ADT7473_FAN3_ALARM));
+static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
+ ALARM2(ADT7473_FAN4_ALARM));
+
+static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
+ show_max_duty_at_crit, set_max_duty_at_crit, 0);
+
+static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
+static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
+static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
+
+static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_min, set_pwm_min, 0);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_min, set_pwm_min, 1);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_min, set_pwm_min, 2);
+
+static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_max, set_pwm_max, 0);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_max, set_pwm_max, 1);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
+ show_pwm_max, set_pwm_max, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmin, set_temp_tmin, 0);
+static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmin, set_temp_tmin, 1);
+static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmin, set_temp_tmin, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmax, set_temp_tmax, 0);
+static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmax, set_temp_tmax, 1);
+static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
+ show_temp_tmax, set_temp_tmax, 2);
+
+static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+ set_pwm_enable, 0);
+static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+ set_pwm_enable, 1);
+static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
+ set_pwm_enable, 2);
+
+static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
+ show_pwm_auto_temp, set_pwm_auto_temp, 0);
+static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
+ show_pwm_auto_temp, set_pwm_auto_temp, 1);
+static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
+ show_pwm_auto_temp, set_pwm_auto_temp, 2);
+
+static struct attribute *adt7473_attr[] =
+{
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
+ &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
+ &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
+ &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
+ &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
+ &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
+
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan3_min.dev_attr.attr,
+ &sensor_dev_attr_fan4_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan3_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan4_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
+
+ &sensor_dev_attr_pwm1.dev_attr.attr,
+ &sensor_dev_attr_pwm2.dev_attr.attr,
+ &sensor_dev_attr_pwm3.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
+ &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
+
+ &sensor_dev_attr_pwm1_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm2_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm3_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
+ &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
+
+ NULL
+};
+
+static int adt7473_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_probe(adapter, &addr_data, adt7473_detect);
+}
+
+static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *client;
+ struct adt7473_data *data;
+ int err = 0;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ client = &data->client;
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &adt7473_driver;
+
+ i2c_set_clientdata(client, data);
+
+ mutex_init(&data->lock);
+
+ if (kind <= 0) {
+ int vendor, device, revision;
+
+ vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
+ if (vendor != ADT7473_VENDOR) {
+ err = -ENODEV;
+ goto exit_free;
+ }
+
+ device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
+ if (device != ADT7473_DEVICE) {
+ err = -ENODEV;
+ goto exit_free;
+ }
+
+ revision = i2c_smbus_read_byte_data(client,
+ ADT7473_REG_REVISION);
+ if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
+ err = -ENODEV;
+ goto exit_free;
+ }
+ } else
+ dev_dbg(&adapter->dev, "detection forced\n");
+
+ strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
+
+ err = i2c_attach_client(client);
+ if (err)
+ goto exit_free;
+
+ dev_info(&client->dev, "%s chip found\n", client->name);
+
+ /* Initialize the ADT7473 chip */
+ adt7473_init_client(client);
+
+ /* Register sysfs hooks */
+ data->attrs.attrs = adt7473_attr;
+ err = sysfs_create_group(&client->dev.kobj, &data->attrs);
+ if (err)
+ goto exit_detach;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
+ }
+
+ return 0;
+
+exit_remove:
+ sysfs_remove_group(&client->dev.kobj, &data->attrs);
+exit_detach:
+ i2c_detach_client(client);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int adt7473_detach_client(struct i2c_client *client)
+{
+ struct adt7473_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &data->attrs);
+ i2c_detach_client(client);
+ kfree(data);
+ return 0;
+}
+
+static int __init adt7473_init(void)
+{
+ return i2c_add_driver(&adt7473_driver);
+}
+
+static void __exit adt7473_exit(void)
+{
+ i2c_del_driver(&adt7473_driver);
+}
+
+MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
+MODULE_DESCRIPTION("ADT7473 driver");
+MODULE_LICENSE("GPL");
+
+module_init(adt7473_init);
+module_exit(adt7473_exit);

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