Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm63.c - driver for the National Semiconductor LM63 temperature sensor | |
3 | * with integrated fan control | |
4 | * Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> | |
5 | * Based on the lm90 driver. | |
6 | * | |
7 | * The LM63 is a sensor chip made by National Semiconductor. It measures | |
8 | * two temperatures (its own and one external one) and the speed of one | |
9 | * fan, those speed it can additionally control. Complete datasheet can be | |
10 | * obtained from National's website at: | |
11 | * http://www.national.com/pf/LM/LM63.html | |
12 | * | |
13 | * The LM63 is basically an LM86 with fan speed monitoring and control | |
14 | * capabilities added. It misses some of the LM86 features though: | |
15 | * - No low limit for local temperature. | |
16 | * - No critical limit for local temperature. | |
17 | * - Critical limit for remote temperature can be changed only once. We | |
18 | * will consider that the critical limit is read-only. | |
19 | * | |
20 | * The datasheet isn't very clear about what the tachometer reading is. | |
21 | * I had a explanation from National Semiconductor though. The two lower | |
22 | * bits of the read value have to be masked out. The value is still 16 bit | |
23 | * in width. | |
24 | * | |
25 | * This program is free software; you can redistribute it and/or modify | |
26 | * it under the terms of the GNU General Public License as published by | |
27 | * the Free Software Foundation; either version 2 of the License, or | |
28 | * (at your option) any later version. | |
29 | * | |
30 | * This program is distributed in the hope that it will be useful, | |
31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
33 | * GNU General Public License for more details. | |
34 | * | |
35 | * You should have received a copy of the GNU General Public License | |
36 | * along with this program; if not, write to the Free Software | |
37 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
38 | */ | |
39 | ||
40 | #include <linux/config.h> | |
41 | #include <linux/module.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/jiffies.h> | |
45 | #include <linux/i2c.h> | |
46 | #include <linux/i2c-sensor.h> | |
47 | ||
48 | /* | |
49 | * Addresses to scan | |
50 | * Address is fully defined internally and cannot be changed. | |
51 | */ | |
52 | ||
53 | static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; | |
54 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
55 | ||
56 | /* | |
57 | * Insmod parameters | |
58 | */ | |
59 | ||
60 | SENSORS_INSMOD_1(lm63); | |
61 | ||
62 | /* | |
63 | * The LM63 registers | |
64 | */ | |
65 | ||
66 | #define LM63_REG_CONFIG1 0x03 | |
67 | #define LM63_REG_CONFIG2 0xBF | |
68 | #define LM63_REG_CONFIG_FAN 0x4A | |
69 | ||
70 | #define LM63_REG_TACH_COUNT_MSB 0x47 | |
71 | #define LM63_REG_TACH_COUNT_LSB 0x46 | |
72 | #define LM63_REG_TACH_LIMIT_MSB 0x49 | |
73 | #define LM63_REG_TACH_LIMIT_LSB 0x48 | |
74 | ||
75 | #define LM63_REG_PWM_VALUE 0x4C | |
76 | #define LM63_REG_PWM_FREQ 0x4D | |
77 | ||
78 | #define LM63_REG_LOCAL_TEMP 0x00 | |
79 | #define LM63_REG_LOCAL_HIGH 0x05 | |
80 | ||
81 | #define LM63_REG_REMOTE_TEMP_MSB 0x01 | |
82 | #define LM63_REG_REMOTE_TEMP_LSB 0x10 | |
83 | #define LM63_REG_REMOTE_OFFSET_MSB 0x11 | |
84 | #define LM63_REG_REMOTE_OFFSET_LSB 0x12 | |
85 | #define LM63_REG_REMOTE_HIGH_MSB 0x07 | |
86 | #define LM63_REG_REMOTE_HIGH_LSB 0x13 | |
87 | #define LM63_REG_REMOTE_LOW_MSB 0x08 | |
88 | #define LM63_REG_REMOTE_LOW_LSB 0x14 | |
89 | #define LM63_REG_REMOTE_TCRIT 0x19 | |
90 | #define LM63_REG_REMOTE_TCRIT_HYST 0x21 | |
91 | ||
92 | #define LM63_REG_ALERT_STATUS 0x02 | |
93 | #define LM63_REG_ALERT_MASK 0x16 | |
94 | ||
95 | #define LM63_REG_MAN_ID 0xFE | |
96 | #define LM63_REG_CHIP_ID 0xFF | |
97 | ||
98 | /* | |
99 | * Conversions and various macros | |
100 | * For tachometer counts, the LM63 uses 16-bit values. | |
101 | * For local temperature and high limit, remote critical limit and hysteresis | |
102 | * value, it uses signed 8-bit values with LSB = 1 degree Celcius. | |
103 | * For remote temperature, low and high limits, it uses signed 11-bit values | |
104 | * with LSB = 0.125 degree Celcius, left-justified in 16-bit registers. | |
105 | */ | |
106 | ||
107 | #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ | |
108 | 5400000 / (reg)) | |
109 | #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ | |
110 | (5400000 / (val)) & 0xFFFC) | |
111 | #define TEMP8_FROM_REG(reg) ((reg) * 1000) | |
112 | #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ | |
113 | (val) >= 127000 ? 127 : \ | |
114 | (val) < 0 ? ((val) - 500) / 1000 : \ | |
115 | ((val) + 500) / 1000) | |
116 | #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) | |
117 | #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ | |
118 | (val) >= 127875 ? 0x7FE0 : \ | |
119 | (val) < 0 ? ((val) - 62) / 125 * 32 : \ | |
120 | ((val) + 62) / 125 * 32) | |
121 | #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ | |
122 | (val) >= 127000 ? 127 : \ | |
123 | ((val) + 500) / 1000) | |
124 | ||
125 | /* | |
126 | * Functions declaration | |
127 | */ | |
128 | ||
129 | static int lm63_attach_adapter(struct i2c_adapter *adapter); | |
130 | static int lm63_detach_client(struct i2c_client *client); | |
131 | ||
132 | static struct lm63_data *lm63_update_device(struct device *dev); | |
133 | ||
134 | static int lm63_detect(struct i2c_adapter *adapter, int address, int kind); | |
135 | static void lm63_init_client(struct i2c_client *client); | |
136 | ||
137 | /* | |
138 | * Driver data (common to all clients) | |
139 | */ | |
140 | ||
141 | static struct i2c_driver lm63_driver = { | |
142 | .owner = THIS_MODULE, | |
143 | .name = "lm63", | |
144 | .flags = I2C_DF_NOTIFY, | |
145 | .attach_adapter = lm63_attach_adapter, | |
146 | .detach_client = lm63_detach_client, | |
147 | }; | |
148 | ||
149 | /* | |
150 | * Client data (each client gets its own) | |
151 | */ | |
152 | ||
153 | struct lm63_data { | |
154 | struct i2c_client client; | |
155 | struct semaphore update_lock; | |
156 | char valid; /* zero until following fields are valid */ | |
157 | unsigned long last_updated; /* in jiffies */ | |
158 | ||
159 | /* registers values */ | |
160 | u8 config, config_fan; | |
161 | u16 fan1_input; | |
162 | u16 fan1_low; | |
163 | u8 pwm1_freq; | |
164 | u8 pwm1_value; | |
165 | s8 temp1_input; | |
166 | s8 temp1_high; | |
167 | s16 temp2_input; | |
168 | s16 temp2_high; | |
169 | s16 temp2_low; | |
170 | s8 temp2_crit; | |
171 | u8 temp2_crit_hyst; | |
172 | u8 alarms; | |
173 | }; | |
174 | ||
175 | /* | |
176 | * Sysfs callback functions and files | |
177 | */ | |
178 | ||
179 | #define show_fan(value) \ | |
180 | static ssize_t show_##value(struct device *dev, char *buf) \ | |
181 | { \ | |
182 | struct lm63_data *data = lm63_update_device(dev); \ | |
183 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->value)); \ | |
184 | } | |
185 | show_fan(fan1_input); | |
186 | show_fan(fan1_low); | |
187 | ||
188 | static ssize_t set_fan1_low(struct device *dev, const char *buf, | |
189 | size_t count) | |
190 | { | |
191 | struct i2c_client *client = to_i2c_client(dev); | |
192 | struct lm63_data *data = i2c_get_clientdata(client); | |
193 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
194 | ||
195 | down(&data->update_lock); | |
196 | data->fan1_low = FAN_TO_REG(val); | |
197 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, | |
198 | data->fan1_low & 0xFF); | |
199 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, | |
200 | data->fan1_low >> 8); | |
201 | up(&data->update_lock); | |
202 | return count; | |
203 | } | |
204 | ||
205 | static ssize_t show_pwm1(struct device *dev, char *buf) | |
206 | { | |
207 | struct lm63_data *data = lm63_update_device(dev); | |
208 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
209 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
210 | (2 * data->pwm1_freq)); | |
211 | } | |
212 | ||
213 | static ssize_t set_pwm1(struct device *dev, const char *buf, size_t count) | |
214 | { | |
215 | struct i2c_client *client = to_i2c_client(dev); | |
216 | struct lm63_data *data = i2c_get_clientdata(client); | |
217 | unsigned long val; | |
218 | ||
219 | if (!(data->config_fan & 0x20)) /* register is read-only */ | |
220 | return -EPERM; | |
221 | ||
222 | val = simple_strtoul(buf, NULL, 10); | |
223 | down(&data->update_lock); | |
224 | data->pwm1_value = val <= 0 ? 0 : | |
225 | val >= 255 ? 2 * data->pwm1_freq : | |
226 | (val * data->pwm1_freq * 2 + 127) / 255; | |
227 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
228 | up(&data->update_lock); | |
229 | return count; | |
230 | } | |
231 | ||
232 | static ssize_t show_pwm1_enable(struct device *dev, char *buf) | |
233 | { | |
234 | struct lm63_data *data = lm63_update_device(dev); | |
235 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
236 | } | |
237 | ||
238 | #define show_temp8(value) \ | |
239 | static ssize_t show_##value(struct device *dev, char *buf) \ | |
240 | { \ | |
241 | struct lm63_data *data = lm63_update_device(dev); \ | |
242 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->value)); \ | |
243 | } | |
244 | #define show_temp11(value) \ | |
245 | static ssize_t show_##value(struct device *dev, char *buf) \ | |
246 | { \ | |
247 | struct lm63_data *data = lm63_update_device(dev); \ | |
248 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->value)); \ | |
249 | } | |
250 | show_temp8(temp1_input); | |
251 | show_temp8(temp1_high); | |
252 | show_temp11(temp2_input); | |
253 | show_temp11(temp2_high); | |
254 | show_temp11(temp2_low); | |
255 | show_temp8(temp2_crit); | |
256 | ||
257 | #define set_temp8(value, reg) \ | |
258 | static ssize_t set_##value(struct device *dev, const char *buf, \ | |
259 | size_t count) \ | |
260 | { \ | |
261 | struct i2c_client *client = to_i2c_client(dev); \ | |
262 | struct lm63_data *data = i2c_get_clientdata(client); \ | |
263 | long val = simple_strtol(buf, NULL, 10); \ | |
264 | \ | |
265 | down(&data->update_lock); \ | |
266 | data->value = TEMP8_TO_REG(val); \ | |
267 | i2c_smbus_write_byte_data(client, reg, data->value); \ | |
268 | up(&data->update_lock); \ | |
269 | return count; \ | |
270 | } | |
271 | #define set_temp11(value, reg_msb, reg_lsb) \ | |
272 | static ssize_t set_##value(struct device *dev, const char *buf, \ | |
273 | size_t count) \ | |
274 | { \ | |
275 | struct i2c_client *client = to_i2c_client(dev); \ | |
276 | struct lm63_data *data = i2c_get_clientdata(client); \ | |
277 | long val = simple_strtol(buf, NULL, 10); \ | |
278 | \ | |
279 | down(&data->update_lock); \ | |
280 | data->value = TEMP11_TO_REG(val); \ | |
281 | i2c_smbus_write_byte_data(client, reg_msb, data->value >> 8); \ | |
282 | i2c_smbus_write_byte_data(client, reg_lsb, data->value & 0xff); \ | |
283 | up(&data->update_lock); \ | |
284 | return count; \ | |
285 | } | |
286 | set_temp8(temp1_high, LM63_REG_LOCAL_HIGH); | |
287 | set_temp11(temp2_high, LM63_REG_REMOTE_HIGH_MSB, LM63_REG_REMOTE_HIGH_LSB); | |
288 | set_temp11(temp2_low, LM63_REG_REMOTE_LOW_MSB, LM63_REG_REMOTE_LOW_LSB); | |
289 | ||
290 | /* Hysteresis register holds a relative value, while we want to present | |
291 | an absolute to user-space */ | |
292 | static ssize_t show_temp2_crit_hyst(struct device *dev, char *buf) | |
293 | { | |
294 | struct lm63_data *data = lm63_update_device(dev); | |
295 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp2_crit) | |
296 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); | |
297 | } | |
298 | ||
299 | /* And now the other way around, user-space provides an absolute | |
300 | hysteresis value and we have to store a relative one */ | |
301 | static ssize_t set_temp2_crit_hyst(struct device *dev, const char *buf, | |
302 | size_t count) | |
303 | { | |
304 | struct i2c_client *client = to_i2c_client(dev); | |
305 | struct lm63_data *data = i2c_get_clientdata(client); | |
306 | long val = simple_strtol(buf, NULL, 10); | |
307 | long hyst; | |
308 | ||
309 | down(&data->update_lock); | |
310 | hyst = TEMP8_FROM_REG(data->temp2_crit) - val; | |
311 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, | |
312 | HYST_TO_REG(hyst)); | |
313 | up(&data->update_lock); | |
314 | return count; | |
315 | } | |
316 | ||
317 | static ssize_t show_alarms(struct device *dev, char *buf) | |
318 | { | |
319 | struct lm63_data *data = lm63_update_device(dev); | |
320 | return sprintf(buf, "%u\n", data->alarms); | |
321 | } | |
322 | ||
323 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan1_input, NULL); | |
324 | static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan1_low, | |
325 | set_fan1_low); | |
326 | ||
327 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
328 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
329 | ||
330 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp1_input, NULL); | |
331 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp1_high, | |
332 | set_temp1_high); | |
333 | ||
334 | static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp2_input, NULL); | |
335 | static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp2_low, | |
336 | set_temp2_low); | |
337 | static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp2_high, | |
338 | set_temp2_high); | |
339 | static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp2_crit, NULL); | |
340 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, | |
341 | set_temp2_crit_hyst); | |
342 | ||
343 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
344 | ||
345 | /* | |
346 | * Real code | |
347 | */ | |
348 | ||
349 | static int lm63_attach_adapter(struct i2c_adapter *adapter) | |
350 | { | |
351 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
352 | return 0; | |
353 | return i2c_detect(adapter, &addr_data, lm63_detect); | |
354 | } | |
355 | ||
356 | /* | |
357 | * The following function does more than just detection. If detection | |
358 | * succeeds, it also registers the new chip. | |
359 | */ | |
360 | static int lm63_detect(struct i2c_adapter *adapter, int address, int kind) | |
361 | { | |
362 | struct i2c_client *new_client; | |
363 | struct lm63_data *data; | |
364 | int err = 0; | |
365 | ||
366 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
367 | goto exit; | |
368 | ||
369 | if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) { | |
370 | err = -ENOMEM; | |
371 | goto exit; | |
372 | } | |
373 | memset(data, 0, sizeof(struct lm63_data)); | |
374 | ||
375 | /* The common I2C client data is placed right before the | |
376 | LM63-specific data. */ | |
377 | new_client = &data->client; | |
378 | i2c_set_clientdata(new_client, data); | |
379 | new_client->addr = address; | |
380 | new_client->adapter = adapter; | |
381 | new_client->driver = &lm63_driver; | |
382 | new_client->flags = 0; | |
383 | ||
384 | /* Default to an LM63 if forced */ | |
385 | if (kind == 0) | |
386 | kind = lm63; | |
387 | ||
388 | if (kind < 0) { /* must identify */ | |
389 | u8 man_id, chip_id, reg_config1, reg_config2; | |
390 | u8 reg_alert_status, reg_alert_mask; | |
391 | ||
392 | man_id = i2c_smbus_read_byte_data(new_client, | |
393 | LM63_REG_MAN_ID); | |
394 | chip_id = i2c_smbus_read_byte_data(new_client, | |
395 | LM63_REG_CHIP_ID); | |
396 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
397 | LM63_REG_CONFIG1); | |
398 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
399 | LM63_REG_CONFIG2); | |
400 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
401 | LM63_REG_ALERT_STATUS); | |
402 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
403 | LM63_REG_ALERT_MASK); | |
404 | ||
405 | if (man_id == 0x01 /* National Semiconductor */ | |
406 | && chip_id == 0x41 /* LM63 */ | |
407 | && (reg_config1 & 0x18) == 0x00 | |
408 | && (reg_config2 & 0xF8) == 0x00 | |
409 | && (reg_alert_status & 0x20) == 0x00 | |
410 | && (reg_alert_mask & 0xA4) == 0xA4) { | |
411 | kind = lm63; | |
412 | } else { /* failed */ | |
413 | dev_dbg(&adapter->dev, "Unsupported chip " | |
414 | "(man_id=0x%02X, chip_id=0x%02X).\n", | |
415 | man_id, chip_id); | |
416 | goto exit_free; | |
417 | } | |
418 | } | |
419 | ||
420 | strlcpy(new_client->name, "lm63", I2C_NAME_SIZE); | |
421 | data->valid = 0; | |
422 | init_MUTEX(&data->update_lock); | |
423 | ||
424 | /* Tell the I2C layer a new client has arrived */ | |
425 | if ((err = i2c_attach_client(new_client))) | |
426 | goto exit_free; | |
427 | ||
428 | /* Initialize the LM63 chip */ | |
429 | lm63_init_client(new_client); | |
430 | ||
431 | /* Register sysfs hooks */ | |
432 | if (data->config & 0x04) { /* tachometer enabled */ | |
433 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
434 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
435 | } | |
436 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
437 | device_create_file(&new_client->dev, &dev_attr_pwm1_enable); | |
438 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
439 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
440 | device_create_file(&new_client->dev, &dev_attr_temp2_min); | |
441 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
442 | device_create_file(&new_client->dev, &dev_attr_temp2_max); | |
443 | device_create_file(&new_client->dev, &dev_attr_temp2_crit); | |
444 | device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst); | |
445 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
446 | ||
447 | return 0; | |
448 | ||
449 | exit_free: | |
450 | kfree(data); | |
451 | exit: | |
452 | return err; | |
453 | } | |
454 | ||
455 | /* Idealy we shouldn't have to initialize anything, since the BIOS | |
456 | should have taken care of everything */ | |
457 | static void lm63_init_client(struct i2c_client *client) | |
458 | { | |
459 | struct lm63_data *data = i2c_get_clientdata(client); | |
460 | ||
461 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
462 | data->config_fan = i2c_smbus_read_byte_data(client, | |
463 | LM63_REG_CONFIG_FAN); | |
464 | ||
465 | /* Start converting if needed */ | |
466 | if (data->config & 0x40) { /* standby */ | |
467 | dev_dbg(&client->dev, "Switching to operational mode"); | |
468 | data->config &= 0xA7; | |
469 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
470 | data->config); | |
471 | } | |
472 | ||
473 | /* We may need pwm1_freq before ever updating the client data */ | |
474 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
475 | if (data->pwm1_freq == 0) | |
476 | data->pwm1_freq = 1; | |
477 | ||
478 | /* Show some debug info about the LM63 configuration */ | |
479 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
480 | (data->config & 0x04) ? "tachometer input" : | |
481 | "alert output"); | |
482 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
483 | (data->config_fan & 0x08) ? "1.4" : "360", | |
484 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
485 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
486 | (data->config_fan & 0x10) ? "low" : "high", | |
487 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
488 | } | |
489 | ||
490 | static int lm63_detach_client(struct i2c_client *client) | |
491 | { | |
492 | int err; | |
493 | ||
494 | if ((err = i2c_detach_client(client))) { | |
495 | dev_err(&client->dev, "Client deregistration failed, " | |
496 | "client not detached\n"); | |
497 | return err; | |
498 | } | |
499 | ||
500 | kfree(i2c_get_clientdata(client)); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static struct lm63_data *lm63_update_device(struct device *dev) | |
505 | { | |
506 | struct i2c_client *client = to_i2c_client(dev); | |
507 | struct lm63_data *data = i2c_get_clientdata(client); | |
508 | ||
509 | down(&data->update_lock); | |
510 | ||
511 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
512 | if (data->config & 0x04) { /* tachometer enabled */ | |
513 | /* order matters for fan1_input */ | |
514 | data->fan1_input = i2c_smbus_read_byte_data(client, | |
515 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
516 | data->fan1_input |= i2c_smbus_read_byte_data(client, | |
517 | LM63_REG_TACH_COUNT_MSB) << 8; | |
518 | data->fan1_low = (i2c_smbus_read_byte_data(client, | |
519 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
520 | | (i2c_smbus_read_byte_data(client, | |
521 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
522 | } | |
523 | ||
524 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
525 | LM63_REG_PWM_FREQ); | |
526 | if (data->pwm1_freq == 0) | |
527 | data->pwm1_freq = 1; | |
528 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
529 | LM63_REG_PWM_VALUE); | |
530 | ||
531 | data->temp1_input = i2c_smbus_read_byte_data(client, | |
532 | LM63_REG_LOCAL_TEMP); | |
533 | data->temp1_high = i2c_smbus_read_byte_data(client, | |
534 | LM63_REG_LOCAL_HIGH); | |
535 | ||
536 | /* order matters for temp2_input */ | |
537 | data->temp2_input = i2c_smbus_read_byte_data(client, | |
538 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
539 | data->temp2_input |= i2c_smbus_read_byte_data(client, | |
540 | LM63_REG_REMOTE_TEMP_LSB); | |
541 | data->temp2_high = (i2c_smbus_read_byte_data(client, | |
542 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
543 | | i2c_smbus_read_byte_data(client, | |
544 | LM63_REG_REMOTE_HIGH_LSB); | |
545 | data->temp2_low = (i2c_smbus_read_byte_data(client, | |
546 | LM63_REG_REMOTE_LOW_MSB) << 8) | |
547 | | i2c_smbus_read_byte_data(client, | |
548 | LM63_REG_REMOTE_LOW_LSB); | |
549 | data->temp2_crit = i2c_smbus_read_byte_data(client, | |
550 | LM63_REG_REMOTE_TCRIT); | |
551 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, | |
552 | LM63_REG_REMOTE_TCRIT_HYST); | |
553 | ||
554 | data->alarms = i2c_smbus_read_byte_data(client, | |
555 | LM63_REG_ALERT_STATUS) & 0x7F; | |
556 | ||
557 | data->last_updated = jiffies; | |
558 | data->valid = 1; | |
559 | } | |
560 | ||
561 | up(&data->update_lock); | |
562 | ||
563 | return data; | |
564 | } | |
565 | ||
566 | static int __init sensors_lm63_init(void) | |
567 | { | |
568 | return i2c_add_driver(&lm63_driver); | |
569 | } | |
570 | ||
571 | static void __exit sensors_lm63_exit(void) | |
572 | { | |
573 | i2c_del_driver(&lm63_driver); | |
574 | } | |
575 | ||
576 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
577 | MODULE_DESCRIPTION("LM63 driver"); | |
578 | MODULE_LICENSE("GPL"); | |
579 | ||
580 | module_init(sensors_lm63_init); | |
581 | module_exit(sensors_lm63_exit); |