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hwmon: Fix unchecked return status, batch 3
[deliverable/linux.git] / drivers / hwmon / lm63.c
CommitLineData
1da177e4
LT		 1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
2d45771e 4 * Copyright (C) 2004-2006 Jean Delvare <khali@linux-fr.org>
1da177e4
LT		 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
1da177e4
LT		 40#include <linux/module.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/jiffies.h>
44#include <linux/i2c.h>
10c08f81 45#include <linux/hwmon-sysfs.h>
943b0830
MH		 46#include <linux/hwmon.h>
47#include <linux/err.h>
9a61bf63 48#include <linux/mutex.h>
1da177e4
LT		 49
50/*
51 * Addresses to scan
52 * Address is fully defined internally and cannot be changed.
53 */
54
55static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
1da177e4
LT		 56
57/*
58 * Insmod parameters
59 */
60
f4b50261 61I2C_CLIENT_INSMOD_1(lm63);
1da177e4
LT		 62
63/*
64 * The LM63 registers
65 */
66
67#define LM63_REG_CONFIG1 0x03
68#define LM63_REG_CONFIG2 0xBF
69#define LM63_REG_CONFIG_FAN 0x4A
70
71#define LM63_REG_TACH_COUNT_MSB 0x47
72#define LM63_REG_TACH_COUNT_LSB 0x46
73#define LM63_REG_TACH_LIMIT_MSB 0x49
74#define LM63_REG_TACH_LIMIT_LSB 0x48
75
76#define LM63_REG_PWM_VALUE 0x4C
77#define LM63_REG_PWM_FREQ 0x4D
78
79#define LM63_REG_LOCAL_TEMP 0x00
80#define LM63_REG_LOCAL_HIGH 0x05
81
82#define LM63_REG_REMOTE_TEMP_MSB 0x01
83#define LM63_REG_REMOTE_TEMP_LSB 0x10
84#define LM63_REG_REMOTE_OFFSET_MSB 0x11
85#define LM63_REG_REMOTE_OFFSET_LSB 0x12
86#define LM63_REG_REMOTE_HIGH_MSB 0x07
87#define LM63_REG_REMOTE_HIGH_LSB 0x13
88#define LM63_REG_REMOTE_LOW_MSB 0x08
89#define LM63_REG_REMOTE_LOW_LSB 0x14
90#define LM63_REG_REMOTE_TCRIT 0x19
91#define LM63_REG_REMOTE_TCRIT_HYST 0x21
92
93#define LM63_REG_ALERT_STATUS 0x02
94#define LM63_REG_ALERT_MASK 0x16
95
96#define LM63_REG_MAN_ID 0xFE
97#define LM63_REG_CHIP_ID 0xFF
98
99/*
100 * Conversions and various macros
101 * For tachometer counts, the LM63 uses 16-bit values.
102 * For local temperature and high limit, remote critical limit and hysteresis
44bbe87e 103 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
1da177e4 104 * For remote temperature, low and high limits, it uses signed 11-bit values
44bbe87e 105 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
1da177e4
LT		 106 */
107
108#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
109 5400000 / (reg))
110#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
111 (5400000 / (val)) & 0xFFFC)
112#define TEMP8_FROM_REG(reg) ((reg) * 1000)
113#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
114 (val) >= 127000 ? 127 : \
115 (val) < 0 ? ((val) - 500) / 1000 : \
116 ((val) + 500) / 1000)
117#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
118#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
119 (val) >= 127875 ? 0x7FE0 : \
120 (val) < 0 ? ((val) - 62) / 125 * 32 : \
121 ((val) + 62) / 125 * 32)
122#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
123 (val) >= 127000 ? 127 : \
124 ((val) + 500) / 1000)
125
126/*
127 * Functions declaration
128 */
129
130static int lm63_attach_adapter(struct i2c_adapter *adapter);
131static int lm63_detach_client(struct i2c_client *client);
132
133static struct lm63_data *lm63_update_device(struct device *dev);
134
135static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
136static void lm63_init_client(struct i2c_client *client);
137
138/*
139 * Driver data (common to all clients)
140 */
141
142static struct i2c_driver lm63_driver = {
cdaf7934 143 .driver = {
cdaf7934
LR		 144 .name = "lm63",
145 },
1da177e4
LT		 146 .attach_adapter = lm63_attach_adapter,
147 .detach_client = lm63_detach_client,
148};
149
150/*
151 * Client data (each client gets its own)
152 */
153
154struct lm63_data {
155 struct i2c_client client;
943b0830 156 struct class_device *class_dev;
9a61bf63 157 struct mutex update_lock;
1da177e4
LT		 158 char valid; /* zero until following fields are valid */
159 unsigned long last_updated; /* in jiffies */
160
161 /* registers values */
162 u8 config, config_fan;
bc51ae11
JD		 163 u16 fan[2]; /* 0: input
164 1: low limit */
1da177e4
LT		 165 u8 pwm1_freq;
166 u8 pwm1_value;
bc51ae11
JD		 167 s8 temp8[3]; /* 0: local input
168 1: local high limit
169 2: remote critical limit */
170 s16 temp11[3]; /* 0: remote input
171 1: remote low limit
172 2: remote high limit */
1da177e4
LT		 173 u8 temp2_crit_hyst;
174 u8 alarms;
175};
176
177/*
178 * Sysfs callback functions and files
179 */
180
bc51ae11
JD		 181static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
182 char *buf)
183{
184 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
185 struct lm63_data *data = lm63_update_device(dev);
186 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
1da177e4 187}
1da177e4 188
bc51ae11
JD		 189static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
190 const char *buf, size_t count)
1da177e4
LT		 191{
192 struct i2c_client *client = to_i2c_client(dev);
193 struct lm63_data *data = i2c_get_clientdata(client);
194 unsigned long val = simple_strtoul(buf, NULL, 10);
195
9a61bf63 196 mutex_lock(&data->update_lock);
bc51ae11 197 data->fan[1] = FAN_TO_REG(val);
1da177e4 198 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
bc51ae11 199 data->fan[1] & 0xFF);
1da177e4 200 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
bc51ae11 201 data->fan[1] >> 8);
9a61bf63 202 mutex_unlock(&data->update_lock);
1da177e4
LT		 203 return count;
204}
205
bc51ae11
JD		 206static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
207 char *buf)
1da177e4
LT		 208{
209 struct lm63_data *data = lm63_update_device(dev);
210 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
211 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
212 (2 * data->pwm1_freq));
213}
214
bc51ae11
JD		 215static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
216 const char *buf, size_t count)
1da177e4
LT		 217{
218 struct i2c_client *client = to_i2c_client(dev);
219 struct lm63_data *data = i2c_get_clientdata(client);
220 unsigned long val;
221
222 if (!(data->config_fan & 0x20)) /* register is read-only */
223 return -EPERM;
224
225 val = simple_strtoul(buf, NULL, 10);
9a61bf63 226 mutex_lock(&data->update_lock);
1da177e4
LT		 227 data->pwm1_value = val <= 0 ? 0 :
228 val >= 255 ? 2 * data->pwm1_freq :
229 (val * data->pwm1_freq * 2 + 127) / 255;
230 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
9a61bf63 231 mutex_unlock(&data->update_lock);
1da177e4
LT		 232 return count;
233}
234
bc51ae11
JD		 235static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
236 char *buf)
1da177e4
LT		 237{
238 struct lm63_data *data = lm63_update_device(dev);
239 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
240}
241
bc51ae11
JD		 242static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
243 char *buf)
244{
245 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
246 struct lm63_data *data = lm63_update_device(dev);
247 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
1da177e4 248}
bc51ae11
JD		 249
250static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
251 const char *buf, size_t count)
252{
253 struct i2c_client *client = to_i2c_client(dev);
254 struct lm63_data *data = i2c_get_clientdata(client);
255 long val = simple_strtol(buf, NULL, 10);
256
9a61bf63 257 mutex_lock(&data->update_lock);
bc51ae11
JD		 258 data->temp8[1] = TEMP8_TO_REG(val);
259 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
9a61bf63 260 mutex_unlock(&data->update_lock);
bc51ae11 261 return count;
1da177e4 262}
bc51ae11
JD		 263
264static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
265 char *buf)
266{
267 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
268 struct lm63_data *data = lm63_update_device(dev);
269 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
1da177e4 270}
bc51ae11
JD		 271
272static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
273 const char *buf, size_t count)
274{
275 static const u8 reg[4] = {
276 LM63_REG_REMOTE_LOW_MSB,
277 LM63_REG_REMOTE_LOW_LSB,
278 LM63_REG_REMOTE_HIGH_MSB,
279 LM63_REG_REMOTE_HIGH_LSB,
280 };
281
282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
283 struct i2c_client *client = to_i2c_client(dev);
284 struct lm63_data *data = i2c_get_clientdata(client);
285 long val = simple_strtol(buf, NULL, 10);
286 int nr = attr->index;
287
9a61bf63 288 mutex_lock(&data->update_lock);
bc51ae11
JD		 289 data->temp11[nr] = TEMP11_TO_REG(val);
290 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
291 data->temp11[nr] >> 8);
292 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
293 data->temp11[nr] & 0xff);
9a61bf63 294 mutex_unlock(&data->update_lock);
bc51ae11 295 return count;
1da177e4 296}
1da177e4
LT		 297
298/* Hysteresis register holds a relative value, while we want to present
299 an absolute to user-space */
bc51ae11
JD		 300static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
301 char *buf)
1da177e4
LT		 302{
303 struct lm63_data *data = lm63_update_device(dev);
bc51ae11 304 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
1da177e4
LT		 305 - TEMP8_FROM_REG(data->temp2_crit_hyst));
306}
307
308/* And now the other way around, user-space provides an absolute
309 hysteresis value and we have to store a relative one */
bc51ae11
JD		 310static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
311 const char *buf, size_t count)
1da177e4
LT		 312{
313 struct i2c_client *client = to_i2c_client(dev);
314 struct lm63_data *data = i2c_get_clientdata(client);
315 long val = simple_strtol(buf, NULL, 10);
316 long hyst;
317
9a61bf63 318 mutex_lock(&data->update_lock);
bc51ae11 319 hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
1da177e4
LT		 320 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
321 HYST_TO_REG(hyst));
9a61bf63 322 mutex_unlock(&data->update_lock);
1da177e4
LT		 323 return count;
324}
325
bc51ae11
JD		 326static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
327 char *buf)
1da177e4
LT		 328{
329 struct lm63_data *data = lm63_update_device(dev);
330 return sprintf(buf, "%u\n", data->alarms);
331}
332
2d45771e
JD		 333static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
334 char *buf)
335{
336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
337 struct lm63_data *data = lm63_update_device(dev);
338 int bitnr = attr->index;
339
340 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
341}
342
bc51ae11
JD		 343static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
344static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
345 set_fan, 1);
1da177e4
LT		 346
347static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
348static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
349
bc51ae11
JD		 350static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
351static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
352 set_temp8, 1);
1da177e4 353
bc51ae11
JD		 354static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
355static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
356 set_temp11, 1);
357static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
358 set_temp11, 2);
359static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
1da177e4
LT		 360static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
361 set_temp2_crit_hyst);
362
2d45771e
JD		 363/* Individual alarm files */
364static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
365static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
366static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 2);
367static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
368static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
369static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
370/* Raw alarm file for compatibility */
1da177e4
LT		 371static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
372
373/*
374 * Real code
375 */
376
377static int lm63_attach_adapter(struct i2c_adapter *adapter)
378{
379 if (!(adapter->class & I2C_CLASS_HWMON))
380 return 0;
2ed2dc3c 381 return i2c_probe(adapter, &addr_data, lm63_detect);
1da177e4
LT		 382}
383
384/*
385 * The following function does more than just detection. If detection
386 * succeeds, it also registers the new chip.
387 */
388static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
389{
390 struct i2c_client *new_client;
391 struct lm63_data *data;
392 int err = 0;
393
394 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
395 goto exit;
396
ba9c2e8d 397 if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
1da177e4
LT		 398 err = -ENOMEM;
399 goto exit;
400 }
1da177e4
LT		 401
402 /* The common I2C client data is placed right before the
403 LM63-specific data. */
404 new_client = &data->client;
405 i2c_set_clientdata(new_client, data);
406 new_client->addr = address;
407 new_client->adapter = adapter;
408 new_client->driver = &lm63_driver;
409 new_client->flags = 0;
410
411 /* Default to an LM63 if forced */
412 if (kind == 0)
413 kind = lm63;
414
415 if (kind < 0) { /* must identify */
416 u8 man_id, chip_id, reg_config1, reg_config2;
417 u8 reg_alert_status, reg_alert_mask;
418
419 man_id = i2c_smbus_read_byte_data(new_client,
420 LM63_REG_MAN_ID);
421 chip_id = i2c_smbus_read_byte_data(new_client,
422 LM63_REG_CHIP_ID);
423 reg_config1 = i2c_smbus_read_byte_data(new_client,
424 LM63_REG_CONFIG1);
425 reg_config2 = i2c_smbus_read_byte_data(new_client,
426 LM63_REG_CONFIG2);
427 reg_alert_status = i2c_smbus_read_byte_data(new_client,
428 LM63_REG_ALERT_STATUS);
429 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
430 LM63_REG_ALERT_MASK);
431
432 if (man_id == 0x01 /* National Semiconductor */
433 && chip_id == 0x41 /* LM63 */
434 && (reg_config1 & 0x18) == 0x00
435 && (reg_config2 & 0xF8) == 0x00
436 && (reg_alert_status & 0x20) == 0x00
437 && (reg_alert_mask & 0xA4) == 0xA4) {
438 kind = lm63;
439 } else { /* failed */
440 dev_dbg(&adapter->dev, "Unsupported chip "
441 "(man_id=0x%02X, chip_id=0x%02X).\n",
442 man_id, chip_id);
443 goto exit_free;
444 }
445 }
446
447 strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
448 data->valid = 0;
9a61bf63 449 mutex_init(&data->update_lock);
1da177e4
LT		 450
451 /* Tell the I2C layer a new client has arrived */
452 if ((err = i2c_attach_client(new_client)))
453 goto exit_free;
454
455 /* Initialize the LM63 chip */
456 lm63_init_client(new_client);
457
458 /* Register sysfs hooks */
943b0830
MH		 459 data->class_dev = hwmon_device_register(&new_client->dev);
460 if (IS_ERR(data->class_dev)) {
461 err = PTR_ERR(data->class_dev);
462 goto exit_detach;
463 }
464
1da177e4 465 if (data->config & 0x04) { /* tachometer enabled */
bc51ae11
JD		 466 device_create_file(&new_client->dev,
467 &sensor_dev_attr_fan1_input.dev_attr);
468 device_create_file(&new_client->dev,
469 &sensor_dev_attr_fan1_min.dev_attr);
2d45771e
JD		 470 device_create_file(&new_client->dev,
471 &sensor_dev_attr_fan1_min_alarm.dev_attr);
1da177e4
LT		 472 }
473 device_create_file(&new_client->dev, &dev_attr_pwm1);
474 device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
bc51ae11
JD		 475 device_create_file(&new_client->dev,
476 &sensor_dev_attr_temp1_input.dev_attr);
477 device_create_file(&new_client->dev,
478 &sensor_dev_attr_temp2_input.dev_attr);
479 device_create_file(&new_client->dev,
480 &sensor_dev_attr_temp2_min.dev_attr);
481 device_create_file(&new_client->dev,
482 &sensor_dev_attr_temp1_max.dev_attr);
483 device_create_file(&new_client->dev,
484 &sensor_dev_attr_temp2_max.dev_attr);
485 device_create_file(&new_client->dev,
486 &sensor_dev_attr_temp2_crit.dev_attr);
1da177e4 487 device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
2d45771e
JD		 488
489 device_create_file(&new_client->dev,
490 &sensor_dev_attr_temp2_input_fault.dev_attr);
491 device_create_file(&new_client->dev,
492 &sensor_dev_attr_temp2_min_alarm.dev_attr);
493 device_create_file(&new_client->dev,
494 &sensor_dev_attr_temp1_max_alarm.dev_attr);
495 device_create_file(&new_client->dev,
496 &sensor_dev_attr_temp2_max_alarm.dev_attr);
497 device_create_file(&new_client->dev,
498 &sensor_dev_attr_temp2_crit_alarm.dev_attr);
1da177e4
LT		 499 device_create_file(&new_client->dev, &dev_attr_alarms);
500
501 return 0;
502
943b0830
MH		 503exit_detach:
504 i2c_detach_client(new_client);
1da177e4
LT		 505exit_free:
506 kfree(data);
507exit:
508 return err;
509}
510
511/* Idealy we shouldn't have to initialize anything, since the BIOS
512 should have taken care of everything */
513static void lm63_init_client(struct i2c_client *client)
514{
515 struct lm63_data *data = i2c_get_clientdata(client);
516
517 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
518 data->config_fan = i2c_smbus_read_byte_data(client,
519 LM63_REG_CONFIG_FAN);
520
521 /* Start converting if needed */
522 if (data->config & 0x40) { /* standby */
523 dev_dbg(&client->dev, "Switching to operational mode");
524 data->config &= 0xA7;
525 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
526 data->config);
527 }
528
529 /* We may need pwm1_freq before ever updating the client data */
530 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
531 if (data->pwm1_freq == 0)
532 data->pwm1_freq = 1;
533
534 /* Show some debug info about the LM63 configuration */
535 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
536 (data->config & 0x04) ? "tachometer input" :
537 "alert output");
538 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
539 (data->config_fan & 0x08) ? "1.4" : "360",
540 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
541 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
542 (data->config_fan & 0x10) ? "low" : "high",
543 (data->config_fan & 0x20) ? "manual" : "auto");
544}
545
546static int lm63_detach_client(struct i2c_client *client)
547{
943b0830 548 struct lm63_data *data = i2c_get_clientdata(client);
1da177e4
LT		 549 int err;
550
943b0830
MH		 551 hwmon_device_unregister(data->class_dev);
552
7bef5594 553 if ((err = i2c_detach_client(client)))
1da177e4 554 return err;
1da177e4 555
943b0830 556 kfree(data);
1da177e4
LT		 557 return 0;
558}
559
560static struct lm63_data *lm63_update_device(struct device *dev)
561{
562 struct i2c_client *client = to_i2c_client(dev);
563 struct lm63_data *data = i2c_get_clientdata(client);
564
9a61bf63 565 mutex_lock(&data->update_lock);
1da177e4
LT		 566
567 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
568 if (data->config & 0x04) { /* tachometer enabled */
569 /* order matters for fan1_input */
bc51ae11
JD		 570 data->fan[0] = i2c_smbus_read_byte_data(client,
571 LM63_REG_TACH_COUNT_LSB) & 0xFC;
572 data->fan[0] |= i2c_smbus_read_byte_data(client,
573 LM63_REG_TACH_COUNT_MSB) << 8;
574 data->fan[1] = (i2c_smbus_read_byte_data(client,
575 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
576 | (i2c_smbus_read_byte_data(client,
577 LM63_REG_TACH_LIMIT_MSB) << 8);
1da177e4
LT		 578 }
579
580 data->pwm1_freq = i2c_smbus_read_byte_data(client,
581 LM63_REG_PWM_FREQ);
582 if (data->pwm1_freq == 0)
583 data->pwm1_freq = 1;
584 data->pwm1_value = i2c_smbus_read_byte_data(client,
585 LM63_REG_PWM_VALUE);
586
bc51ae11
JD		 587 data->temp8[0] = i2c_smbus_read_byte_data(client,
588 LM63_REG_LOCAL_TEMP);
589 data->temp8[1] = i2c_smbus_read_byte_data(client,
590 LM63_REG_LOCAL_HIGH);
1da177e4
LT		 591
592 /* order matters for temp2_input */
bc51ae11
JD		 593 data->temp11[0] = i2c_smbus_read_byte_data(client,
594 LM63_REG_REMOTE_TEMP_MSB) << 8;
595 data->temp11[0] |= i2c_smbus_read_byte_data(client,
596 LM63_REG_REMOTE_TEMP_LSB);
597 data->temp11[1] = (i2c_smbus_read_byte_data(client,
1da177e4
LT		 598 LM63_REG_REMOTE_LOW_MSB) << 8)
599 | i2c_smbus_read_byte_data(client,
600 LM63_REG_REMOTE_LOW_LSB);
bc51ae11
JD		 601 data->temp11[2] = (i2c_smbus_read_byte_data(client,
602 LM63_REG_REMOTE_HIGH_MSB) << 8)
603 | i2c_smbus_read_byte_data(client,
604 LM63_REG_REMOTE_HIGH_LSB);
605 data->temp8[2] = i2c_smbus_read_byte_data(client,
606 LM63_REG_REMOTE_TCRIT);
1da177e4
LT		 607 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
608 LM63_REG_REMOTE_TCRIT_HYST);
609
610 data->alarms = i2c_smbus_read_byte_data(client,
611 LM63_REG_ALERT_STATUS) & 0x7F;
612
613 data->last_updated = jiffies;
614 data->valid = 1;
615 }
616
9a61bf63 617 mutex_unlock(&data->update_lock);
1da177e4
LT		 618
619 return data;
620}
621
622static int __init sensors_lm63_init(void)
623{
624 return i2c_add_driver(&lm63_driver);
625}
626
627static void __exit sensors_lm63_exit(void)
628{
629 i2c_del_driver(&lm63_driver);
630}
631
632MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
633MODULE_DESCRIPTION("LM63 driver");
634MODULE_LICENSE("GPL");
635
636module_init(sensors_lm63_init);
637module_exit(sensors_lm63_exit);
Linux kernel - Deliverables
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