/* * smsc47m192.c - Support for hardware monitoring block of * SMSC LPC47M192 and compatible 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> #include <linux/sysfs.h> #include <linux/mutex.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; /* 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 clamp_val(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 clamp_val(SCALE(val, 1, 1000), -128000, 127000); } static inline int TEMP_FROM_REG(s8 val) { return val * 1000; } struct smsc47m192_data { struct device *hwmon_dev; struct mutex 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_probe(struct i2c_client *client, const struct i2c_device_id *id); static int smsc47m192_detect(struct i2c_client *client, struct i2c_board_info *info); static int smsc47m192_remove(struct i2c_client *client); static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); static const struct i2c_device_id smsc47m192_id[] = { { "smsc47m192", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, smsc47m192_id); static struct i2c_driver smsc47m192_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "smsc47m192", }, .probe = smsc47m192_probe, .remove = smsc47m192_remove, .id_table = smsc47m192_id, .detect = smsc47m192_detect, .address_list = normal_i2c, }; /* 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; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&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]); mutex_unlock(&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; int err; err = kstrtoul(buf, 10, &val); if (err) return err; mutex_lock(&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]); mutex_unlock(&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; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&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]); mutex_unlock(&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; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&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]); mutex_unlock(&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; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&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); mutex_unlock(&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 = dev_get_drvdata(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 smsc47m192_data *data = dev_get_drvdata(dev); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; data->vrm = val; 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_fault, S_IRUGO, show_alarm, NULL, 0x4000); static SENSOR_DEVICE_ATTR(temp3_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); static struct attribute *smsc47m192_attributes[] = { &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in0_min.dev_attr.attr, &sensor_dev_attr_in0_max.dev_attr.attr, &sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in5_min.dev_attr.attr, &sensor_dev_attr_in5_max.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, &sensor_dev_attr_in6_input.dev_attr.attr, &sensor_dev_attr_in6_min.dev_attr.attr, &sensor_dev_attr_in6_max.dev_attr.attr, &sensor_dev_attr_in6_alarm.dev_attr.attr, &sensor_dev_attr_in7_input.dev_attr.attr, &sensor_dev_attr_in7_min.dev_attr.attr, &sensor_dev_attr_in7_max.dev_attr.attr, &sensor_dev_attr_in7_alarm.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_offset.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp2_offset.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp3_offset.dev_attr.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &dev_attr_cpu0_vid.attr, &dev_attr_vrm.attr, NULL }; static const struct attribute_group smsc47m192_group = { .attrs = smsc47m192_attributes, }; static struct attribute *smsc47m192_attributes_in4[] = { &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, NULL }; static const struct attribute_group smsc47m192_group_in4 = { .attrs = smsc47m192_attributes_in4, }; 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); } } /* Return 0 if detection is successful, -ENODEV otherwise */ static int smsc47m192_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; int version; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; /* Detection criteria from sensors_detect script */ version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION); if (i2c_smbus_read_byte_data(client, SMSC47M192_REG_COMPANY_ID) == 0x55 && (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 compatible, " "version 2, stepping A%d\n", version & 0x0f); } else { dev_dbg(&adapter->dev, "SMSC47M192 detection failed at 0x%02x\n", client->addr); return -ENODEV; } strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); return 0; } static int smsc47m192_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct smsc47m192_data *data; int config; int err; data = devm_kzalloc(&client->dev, sizeof(struct smsc47m192_data), GFP_KERNEL); if (!data) return -ENOMEM; i2c_set_clientdata(client, data); data->vrm = vid_which_vrm(); mutex_init(&data->update_lock); /* Initialize the SMSC47M192 chip */ smsc47m192_init_client(client); /* Register sysfs hooks */ err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group); if (err) return err; /* Pin 110 is either in4 (+12V) or VID4 */ config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); if (!(config & 0x20)) { err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group_in4); if (err) goto exit_remove_files; } data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove_files; } return 0; exit_remove_files: sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); return err; } static int smsc47m192_remove(struct i2c_client *client) { struct smsc47m192_data *data = i2c_get_clientdata(client); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 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; mutex_lock(&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; } mutex_unlock(&data->update_lock); return data; } module_i2c_driver(smsc47m192_driver); MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); MODULE_DESCRIPTION("SMSC47M192 driver"); MODULE_LICENSE("GPL");