Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * max1619.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | * monitoring |
| 4 | * Copyright (C) 2003-2004 Alexey Fisher <fishor@mail.ru> |
| 5 | * Jean Delvare <khali@linux-fr.org> |
| 6 | * |
| 7 | * Based on the lm90 driver. The MAX1619 is a sensor chip made by Maxim. |
| 8 | * It reports up to two temperatures (its own plus up to |
| 9 | * one external one). Complete datasheet can be |
| 10 | * obtained from Maxim's website at: |
| 11 | * http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/jiffies.h> |
| 33 | #include <linux/i2c.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 34 | #include <linux/hwmon.h> |
Jean Delvare | 71062ff | 2008-01-06 15:27:59 +0100 | [diff] [blame] | 35 | #include <linux/hwmon-sysfs.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 36 | #include <linux/err.h> |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 37 | #include <linux/mutex.h> |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 38 | #include <linux/sysfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Mark M. Hoffman | 25e9c86 | 2008-02-17 22:28:03 -0500 | [diff] [blame] | 40 | static const unsigned short normal_i2c[] = { |
| 41 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | /* |
| 44 | * Insmod parameters |
| 45 | */ |
| 46 | |
Jean Delvare | f4b5026 | 2005-07-31 21:49:03 +0200 | [diff] [blame] | 47 | I2C_CLIENT_INSMOD_1(max1619); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * The MAX1619 registers |
| 51 | */ |
| 52 | |
| 53 | #define MAX1619_REG_R_MAN_ID 0xFE |
| 54 | #define MAX1619_REG_R_CHIP_ID 0xFF |
| 55 | #define MAX1619_REG_R_CONFIG 0x03 |
| 56 | #define MAX1619_REG_W_CONFIG 0x09 |
| 57 | #define MAX1619_REG_R_CONVRATE 0x04 |
| 58 | #define MAX1619_REG_W_CONVRATE 0x0A |
| 59 | #define MAX1619_REG_R_STATUS 0x02 |
| 60 | #define MAX1619_REG_R_LOCAL_TEMP 0x00 |
| 61 | #define MAX1619_REG_R_REMOTE_TEMP 0x01 |
| 62 | #define MAX1619_REG_R_REMOTE_HIGH 0x07 |
| 63 | #define MAX1619_REG_W_REMOTE_HIGH 0x0D |
| 64 | #define MAX1619_REG_R_REMOTE_LOW 0x08 |
| 65 | #define MAX1619_REG_W_REMOTE_LOW 0x0E |
| 66 | #define MAX1619_REG_R_REMOTE_CRIT 0x10 |
| 67 | #define MAX1619_REG_W_REMOTE_CRIT 0x12 |
| 68 | #define MAX1619_REG_R_TCRIT_HYST 0x11 |
| 69 | #define MAX1619_REG_W_TCRIT_HYST 0x13 |
| 70 | |
| 71 | /* |
Andrew Morton | a80e8ee | 2008-10-17 17:51:16 +0200 | [diff] [blame] | 72 | * Conversions |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | */ |
| 74 | |
Andrew Morton | a80e8ee | 2008-10-17 17:51:16 +0200 | [diff] [blame] | 75 | static int temp_from_reg(int val) |
| 76 | { |
| 77 | return (val & 0x80 ? val-0x100 : val) * 1000; |
| 78 | } |
| 79 | |
| 80 | static int temp_to_reg(int val) |
| 81 | { |
| 82 | return (val < 0 ? val+0x100*1000 : val) / 1000; |
| 83 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * Functions declaration |
| 87 | */ |
| 88 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 89 | static int max1619_probe(struct i2c_client *client, |
| 90 | const struct i2c_device_id *id); |
| 91 | static int max1619_detect(struct i2c_client *client, int kind, |
| 92 | struct i2c_board_info *info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static void max1619_init_client(struct i2c_client *client); |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 94 | static int max1619_remove(struct i2c_client *client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | static struct max1619_data *max1619_update_device(struct device *dev); |
| 96 | |
| 97 | /* |
| 98 | * Driver data (common to all clients) |
| 99 | */ |
| 100 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 101 | static const struct i2c_device_id max1619_id[] = { |
| 102 | { "max1619", max1619 }, |
| 103 | { } |
| 104 | }; |
| 105 | MODULE_DEVICE_TABLE(i2c, max1619_id); |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | static struct i2c_driver max1619_driver = { |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 108 | .class = I2C_CLASS_HWMON, |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 109 | .driver = { |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 110 | .name = "max1619", |
| 111 | }, |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 112 | .probe = max1619_probe, |
| 113 | .remove = max1619_remove, |
| 114 | .id_table = max1619_id, |
| 115 | .detect = max1619_detect, |
| 116 | .address_data = &addr_data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | /* |
| 120 | * Client data (each client gets its own) |
| 121 | */ |
| 122 | |
| 123 | struct max1619_data { |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 124 | struct device *hwmon_dev; |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 125 | struct mutex update_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | char valid; /* zero until following fields are valid */ |
| 127 | unsigned long last_updated; /* in jiffies */ |
| 128 | |
| 129 | /* registers values */ |
| 130 | u8 temp_input1; /* local */ |
| 131 | u8 temp_input2, temp_low2, temp_high2; /* remote */ |
| 132 | u8 temp_crit2; |
| 133 | u8 temp_hyst2; |
| 134 | u8 alarms; |
| 135 | }; |
| 136 | |
| 137 | /* |
| 138 | * Sysfs stuff |
| 139 | */ |
| 140 | |
| 141 | #define show_temp(value) \ |
Yani Ioannou | 8627f9b | 2005-05-17 06:42:03 -0400 | [diff] [blame] | 142 | static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { \ |
| 144 | struct max1619_data *data = max1619_update_device(dev); \ |
Andrew Morton | a80e8ee | 2008-10-17 17:51:16 +0200 | [diff] [blame] | 145 | return sprintf(buf, "%d\n", temp_from_reg(data->value)); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
| 147 | show_temp(temp_input1); |
| 148 | show_temp(temp_input2); |
| 149 | show_temp(temp_low2); |
| 150 | show_temp(temp_high2); |
| 151 | show_temp(temp_crit2); |
| 152 | show_temp(temp_hyst2); |
| 153 | |
| 154 | #define set_temp2(value, reg) \ |
Yani Ioannou | 8627f9b | 2005-05-17 06:42:03 -0400 | [diff] [blame] | 155 | static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | size_t count) \ |
| 157 | { \ |
| 158 | struct i2c_client *client = to_i2c_client(dev); \ |
| 159 | struct max1619_data *data = i2c_get_clientdata(client); \ |
| 160 | long val = simple_strtol(buf, NULL, 10); \ |
| 161 | \ |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 162 | mutex_lock(&data->update_lock); \ |
Andrew Morton | a80e8ee | 2008-10-17 17:51:16 +0200 | [diff] [blame] | 163 | data->value = temp_to_reg(val); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | i2c_smbus_write_byte_data(client, reg, data->value); \ |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 165 | mutex_unlock(&data->update_lock); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return count; \ |
| 167 | } |
| 168 | |
| 169 | set_temp2(temp_low2, MAX1619_REG_W_REMOTE_LOW); |
| 170 | set_temp2(temp_high2, MAX1619_REG_W_REMOTE_HIGH); |
| 171 | set_temp2(temp_crit2, MAX1619_REG_W_REMOTE_CRIT); |
| 172 | set_temp2(temp_hyst2, MAX1619_REG_W_TCRIT_HYST); |
| 173 | |
Yani Ioannou | 8627f9b | 2005-05-17 06:42:03 -0400 | [diff] [blame] | 174 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
| 176 | struct max1619_data *data = max1619_update_device(dev); |
| 177 | return sprintf(buf, "%d\n", data->alarms); |
| 178 | } |
| 179 | |
Jean Delvare | 71062ff | 2008-01-06 15:27:59 +0100 | [diff] [blame] | 180 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
| 181 | char *buf) |
| 182 | { |
| 183 | int bitnr = to_sensor_dev_attr(attr)->index; |
| 184 | struct max1619_data *data = max1619_update_device(dev); |
| 185 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); |
| 186 | } |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); |
| 189 | static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL); |
| 190 | static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_low2, |
| 191 | set_temp_low2); |
| 192 | static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_high2, |
| 193 | set_temp_high2); |
| 194 | static DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit2, |
| 195 | set_temp_crit2); |
| 196 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp_hyst2, |
| 197 | set_temp_hyst2); |
| 198 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
Jean Delvare | 71062ff | 2008-01-06 15:27:59 +0100 | [diff] [blame] | 199 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); |
| 200 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
| 201 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
| 202 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 204 | static struct attribute *max1619_attributes[] = { |
| 205 | &dev_attr_temp1_input.attr, |
| 206 | &dev_attr_temp2_input.attr, |
| 207 | &dev_attr_temp2_min.attr, |
| 208 | &dev_attr_temp2_max.attr, |
| 209 | &dev_attr_temp2_crit.attr, |
| 210 | &dev_attr_temp2_crit_hyst.attr, |
| 211 | |
| 212 | &dev_attr_alarms.attr, |
Jean Delvare | 71062ff | 2008-01-06 15:27:59 +0100 | [diff] [blame] | 213 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
| 214 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
| 215 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
| 216 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 217 | NULL |
| 218 | }; |
| 219 | |
| 220 | static const struct attribute_group max1619_group = { |
| 221 | .attrs = max1619_attributes, |
| 222 | }; |
| 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | /* |
| 225 | * Real code |
| 226 | */ |
| 227 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 228 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame^] | 229 | static int max1619_detect(struct i2c_client *client, int kind, |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 230 | struct i2c_board_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame^] | 232 | struct i2c_adapter *adapter = client->adapter; |
| 233 | u8 reg_config, reg_convrate, reg_status, man_id, chip_id; |
Andrew Morton | b0020e3 | 2005-11-07 01:01:49 -0800 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 236 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame^] | 238 | /* detection */ |
| 239 | reg_config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG); |
| 240 | reg_convrate = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONVRATE); |
| 241 | reg_status = i2c_smbus_read_byte_data(client, MAX1619_REG_R_STATUS); |
| 242 | if ((reg_config & 0x03) != 0x00 |
| 243 | || reg_convrate > 0x07 || (reg_status & 0x61) != 0x00) { |
| 244 | dev_dbg(&adapter->dev, "MAX1619 detection failed at 0x%02x\n", |
| 245 | client->addr); |
| 246 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
Jean Delvare | 52df644 | 2009-12-09 20:35:57 +0100 | [diff] [blame^] | 249 | /* identification */ |
| 250 | man_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_MAN_ID); |
| 251 | chip_id = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CHIP_ID); |
| 252 | if (man_id != 0x4D || chip_id != 0x04) { |
| 253 | dev_info(&adapter->dev, |
| 254 | "Unsupported chip (man_id=0x%02X, chip_id=0x%02X).\n", |
| 255 | man_id, chip_id); |
| 256 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 259 | strlcpy(info->type, "max1619", I2C_NAME_SIZE); |
Andrew Morton | b0020e3 | 2005-11-07 01:01:49 -0800 | [diff] [blame] | 260 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static int max1619_probe(struct i2c_client *new_client, |
| 265 | const struct i2c_device_id *id) |
| 266 | { |
| 267 | struct max1619_data *data; |
| 268 | int err; |
| 269 | |
| 270 | data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL); |
| 271 | if (!data) { |
| 272 | err = -ENOMEM; |
| 273 | goto exit; |
| 274 | } |
| 275 | |
| 276 | i2c_set_clientdata(new_client, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | data->valid = 0; |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 278 | mutex_init(&data->update_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | /* Initialize the MAX1619 chip */ |
| 281 | max1619_init_client(new_client); |
| 282 | |
| 283 | /* Register sysfs hooks */ |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 284 | if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group))) |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 285 | goto exit_free; |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 286 | |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 287 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
| 288 | if (IS_ERR(data->hwmon_dev)) { |
| 289 | err = PTR_ERR(data->hwmon_dev); |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 290 | goto exit_remove_files; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 291 | } |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | return 0; |
| 294 | |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 295 | exit_remove_files: |
| 296 | sysfs_remove_group(&new_client->dev.kobj, &max1619_group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | exit_free: |
| 298 | kfree(data); |
| 299 | exit: |
| 300 | return err; |
| 301 | } |
| 302 | |
| 303 | static void max1619_init_client(struct i2c_client *client) |
| 304 | { |
| 305 | u8 config; |
| 306 | |
| 307 | /* |
| 308 | * Start the conversions. |
| 309 | */ |
| 310 | i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONVRATE, |
| 311 | 5); /* 2 Hz */ |
| 312 | config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG); |
| 313 | if (config & 0x40) |
| 314 | i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONFIG, |
| 315 | config & 0xBF); /* run */ |
| 316 | } |
| 317 | |
Jean Delvare | c6d3f6f | 2008-07-16 19:30:15 +0200 | [diff] [blame] | 318 | static int max1619_remove(struct i2c_client *client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | { |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 320 | struct max1619_data *data = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 322 | hwmon_device_unregister(data->hwmon_dev); |
Jean Delvare | a5ebe66 | 2006-09-24 21:24:46 +0200 | [diff] [blame] | 323 | sysfs_remove_group(&client->dev.kobj, &max1619_group); |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 324 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 325 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static struct max1619_data *max1619_update_device(struct device *dev) |
| 330 | { |
| 331 | struct i2c_client *client = to_i2c_client(dev); |
| 332 | struct max1619_data *data = i2c_get_clientdata(client); |
| 333 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 334 | mutex_lock(&data->update_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { |
| 337 | dev_dbg(&client->dev, "Updating max1619 data.\n"); |
| 338 | data->temp_input1 = i2c_smbus_read_byte_data(client, |
| 339 | MAX1619_REG_R_LOCAL_TEMP); |
| 340 | data->temp_input2 = i2c_smbus_read_byte_data(client, |
| 341 | MAX1619_REG_R_REMOTE_TEMP); |
| 342 | data->temp_high2 = i2c_smbus_read_byte_data(client, |
| 343 | MAX1619_REG_R_REMOTE_HIGH); |
| 344 | data->temp_low2 = i2c_smbus_read_byte_data(client, |
| 345 | MAX1619_REG_R_REMOTE_LOW); |
| 346 | data->temp_crit2 = i2c_smbus_read_byte_data(client, |
| 347 | MAX1619_REG_R_REMOTE_CRIT); |
| 348 | data->temp_hyst2 = i2c_smbus_read_byte_data(client, |
| 349 | MAX1619_REG_R_TCRIT_HYST); |
| 350 | data->alarms = i2c_smbus_read_byte_data(client, |
| 351 | MAX1619_REG_R_STATUS); |
| 352 | |
| 353 | data->last_updated = jiffies; |
| 354 | data->valid = 1; |
| 355 | } |
| 356 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 357 | mutex_unlock(&data->update_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
| 359 | return data; |
| 360 | } |
| 361 | |
| 362 | static int __init sensors_max1619_init(void) |
| 363 | { |
| 364 | return i2c_add_driver(&max1619_driver); |
| 365 | } |
| 366 | |
| 367 | static void __exit sensors_max1619_exit(void) |
| 368 | { |
| 369 | i2c_del_driver(&max1619_driver); |
| 370 | } |
| 371 | |
Jean Delvare | 368609c | 2005-07-29 12:15:07 -0700 | [diff] [blame] | 372 | MODULE_AUTHOR("Alexey Fisher <fishor@mail.ru> and " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | "Jean Delvare <khali@linux-fr.org>"); |
| 374 | MODULE_DESCRIPTION("MAX1619 sensor driver"); |
| 375 | MODULE_LICENSE("GPL"); |
| 376 | |
| 377 | module_init(sensors_max1619_init); |
| 378 | module_exit(sensors_max1619_exit); |