blob: 3c70622c8cb1bef7f05c831d64f0d3106338b517 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * adm1025.c
3 *
4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
5 * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
6 *
7 * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
8 * voltages (including its own power source) and up to two temperatures
9 * (its own plus up to one external one). Voltages are scaled internally
10 * (which is not the common way) with ratios such that the nominal value
11 * of each voltage correspond to a register value of 192 (which means a
12 * resolution of about 0.5% of the nominal value). Temperature values are
13 * reported with a 1 deg resolution and a 3 deg accuracy. Complete
14 * datasheet can be obtained from Analog's website at:
15 * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html
16 *
17 * This driver also supports the ADM1025A, which differs from the ADM1025
18 * only in that it has "open-drain VID inputs while the ADM1025 has
19 * on-chip 100k pull-ups on the VID inputs". It doesn't make any
20 * difference for us.
21 *
22 * This driver also supports the NE1619, a sensor chip made by Philips.
23 * That chip is similar to the ADM1025A, with a few differences. The only
24 * difference that matters to us is that the NE1619 has only two possible
25 * addresses while the ADM1025A has a third one. Complete datasheet can be
26 * obtained from Philips's website at:
27 * http://www.semiconductors.philips.com/pip/NE1619DS.html
28 *
29 * Since the ADM1025 was the first chipset supported by this driver, most
30 * comments will refer to this chipset, but are actually general and
31 * concern all supported chipsets, unless mentioned otherwise.
32 *
33 * This program is free software; you can redistribute it and/or modify
34 * it under the terms of the GNU General Public License as published by
35 * the Free Software Foundation; either version 2 of the License, or
36 * (at your option) any later version.
37 *
38 * This program is distributed in the hope that it will be useful,
39 * but WITHOUT ANY WARRANTY; without even the implied warranty of
40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
41 * GNU General Public License for more details.
42 *
43 * You should have received a copy of the GNU General Public License
44 * along with this program; if not, write to the Free Software
45 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
46 */
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <linux/module.h>
49#include <linux/init.h>
50#include <linux/slab.h>
51#include <linux/jiffies.h>
52#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040053#include <linux/hwmon.h>
Jean Delvare303760b2005-07-31 21:52:01 +020054#include <linux/hwmon-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040055#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/*
58 * Addresses to scan
59 * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
60 * NE1619 has two possible addresses: 0x2c and 0x2d.
61 */
62
63static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65/*
66 * Insmod parameters
67 */
68
Jean Delvaref4b50262005-07-31 21:49:03 +020069I2C_CLIENT_INSMOD_2(adm1025, ne1619);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71/*
72 * The ADM1025 registers
73 */
74
75#define ADM1025_REG_MAN_ID 0x3E
76#define ADM1025_REG_CHIP_ID 0x3F
77#define ADM1025_REG_CONFIG 0x40
78#define ADM1025_REG_STATUS1 0x41
79#define ADM1025_REG_STATUS2 0x42
80#define ADM1025_REG_IN(nr) (0x20 + (nr))
81#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2)
82#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2)
83#define ADM1025_REG_TEMP(nr) (0x26 + (nr))
84#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2)
85#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2)
86#define ADM1025_REG_VID 0x47
87#define ADM1025_REG_VID4 0x49
88
89/*
90 * Conversions and various macros
91 * The ADM1025 uses signed 8-bit values for temperatures.
92 */
93
94static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
95
96#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
97#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
98 (val) * 192 >= (scale) * 255 ? 255 : \
99 ((val) * 192 + (scale)/2) / (scale))
100
101#define TEMP_FROM_REG(reg) ((reg) * 1000)
102#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
103 (val) >= 126500 ? 127 : \
104 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
105
106/*
107 * Functions declaration
108 */
109
110static int adm1025_attach_adapter(struct i2c_adapter *adapter);
111static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
112static void adm1025_init_client(struct i2c_client *client);
113static int adm1025_detach_client(struct i2c_client *client);
114static struct adm1025_data *adm1025_update_device(struct device *dev);
115
116/*
117 * Driver data (common to all clients)
118 */
119
120static struct i2c_driver adm1025_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100121 .driver = {
122 .owner = THIS_MODULE,
123 .name = "adm1025",
124 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .id = I2C_DRIVERID_ADM1025,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 .attach_adapter = adm1025_attach_adapter,
127 .detach_client = adm1025_detach_client,
128};
129
130/*
131 * Client data (each client gets its own)
132 */
133
134struct adm1025_data {
135 struct i2c_client client;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400136 struct class_device *class_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 struct semaphore update_lock;
138 char valid; /* zero until following fields are valid */
139 unsigned long last_updated; /* in jiffies */
140
141 u8 in[6]; /* register value */
142 u8 in_max[6]; /* register value */
143 u8 in_min[6]; /* register value */
144 s8 temp[2]; /* register value */
145 s8 temp_min[2]; /* register value */
146 s8 temp_max[2]; /* register value */
147 u16 alarms; /* register values, combined */
148 u8 vid; /* register values, combined */
149 u8 vrm;
150};
151
152/*
153 * Sysfs stuff
154 */
155
156#define show_in(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400157static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{ \
159 struct adm1025_data *data = adm1025_update_device(dev); \
160 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
161 in_scale[offset])); \
162} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400163static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{ \
165 struct adm1025_data *data = adm1025_update_device(dev); \
166 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
167 in_scale[offset])); \
168} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400169static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{ \
171 struct adm1025_data *data = adm1025_update_device(dev); \
172 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
173 in_scale[offset])); \
174} \
175static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
176show_in(0);
177show_in(1);
178show_in(2);
179show_in(3);
180show_in(4);
181show_in(5);
182
183#define show_temp(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400184static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{ \
186 struct adm1025_data *data = adm1025_update_device(dev); \
187 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
188} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400189static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{ \
191 struct adm1025_data *data = adm1025_update_device(dev); \
192 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \
193} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400194static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{ \
196 struct adm1025_data *data = adm1025_update_device(dev); \
197 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \
198}\
199static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL);
200show_temp(1);
201show_temp(2);
202
203#define set_in(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400204static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 size_t count) \
206{ \
207 struct i2c_client *client = to_i2c_client(dev); \
208 struct adm1025_data *data = i2c_get_clientdata(client); \
209 long val = simple_strtol(buf, NULL, 10); \
210 \
211 down(&data->update_lock); \
212 data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \
213 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \
214 data->in_min[offset]); \
215 up(&data->update_lock); \
216 return count; \
217} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400218static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 size_t count) \
220{ \
221 struct i2c_client *client = to_i2c_client(dev); \
222 struct adm1025_data *data = i2c_get_clientdata(client); \
223 long val = simple_strtol(buf, NULL, 10); \
224 \
225 down(&data->update_lock); \
226 data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \
227 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \
228 data->in_max[offset]); \
229 up(&data->update_lock); \
230 return count; \
231} \
232static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
233 show_in##offset##_min, set_in##offset##_min); \
234static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
235 show_in##offset##_max, set_in##offset##_max);
236set_in(0);
237set_in(1);
238set_in(2);
239set_in(3);
240set_in(4);
241set_in(5);
242
243#define set_temp(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400244static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 size_t count) \
246{ \
247 struct i2c_client *client = to_i2c_client(dev); \
248 struct adm1025_data *data = i2c_get_clientdata(client); \
249 long val = simple_strtol(buf, NULL, 10); \
250 \
251 down(&data->update_lock); \
252 data->temp_min[offset-1] = TEMP_TO_REG(val); \
253 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \
254 data->temp_min[offset-1]); \
255 up(&data->update_lock); \
256 return count; \
257} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400258static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 size_t count) \
260{ \
261 struct i2c_client *client = to_i2c_client(dev); \
262 struct adm1025_data *data = i2c_get_clientdata(client); \
263 long val = simple_strtol(buf, NULL, 10); \
264 \
265 down(&data->update_lock); \
266 data->temp_max[offset-1] = TEMP_TO_REG(val); \
267 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \
268 data->temp_max[offset-1]); \
269 up(&data->update_lock); \
270 return count; \
271} \
272static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
273 show_temp##offset##_min, set_temp##offset##_min); \
274static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
275 show_temp##offset##_max, set_temp##offset##_max);
276set_temp(1);
277set_temp(2);
278
Yani Ioannou74880c02005-05-17 06:41:12 -0400279static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
281 struct adm1025_data *data = adm1025_update_device(dev);
282 return sprintf(buf, "%u\n", data->alarms);
283}
284static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
285
Yani Ioannou74880c02005-05-17 06:41:12 -0400286static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
288 struct adm1025_data *data = adm1025_update_device(dev);
289 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
290}
Grant Coady937df8d2005-05-12 11:59:29 +1000291static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Yani Ioannou74880c02005-05-17 06:41:12 -0400293static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
295 struct adm1025_data *data = adm1025_update_device(dev);
296 return sprintf(buf, "%u\n", data->vrm);
297}
Yani Ioannou74880c02005-05-17 06:41:12 -0400298static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
300 struct i2c_client *client = to_i2c_client(dev);
301 struct adm1025_data *data = i2c_get_clientdata(client);
302 data->vrm = simple_strtoul(buf, NULL, 10);
303 return count;
304}
305static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
306
307/*
308 * Real code
309 */
310
311static int adm1025_attach_adapter(struct i2c_adapter *adapter)
312{
313 if (!(adapter->class & I2C_CLASS_HWMON))
314 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200315 return i2c_probe(adapter, &addr_data, adm1025_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
318/*
319 * The following function does more than just detection. If detection
320 * succeeds, it also registers the new chip.
321 */
322static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
323{
324 struct i2c_client *new_client;
325 struct adm1025_data *data;
326 int err = 0;
327 const char *name = "";
328 u8 config;
329
330 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
331 goto exit;
332
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200333 if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 err = -ENOMEM;
335 goto exit;
336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 /* The common I2C client data is placed right before the
339 ADM1025-specific data. */
340 new_client = &data->client;
341 i2c_set_clientdata(new_client, data);
342 new_client->addr = address;
343 new_client->adapter = adapter;
344 new_client->driver = &adm1025_driver;
345 new_client->flags = 0;
346
347 /*
348 * Now we do the remaining detection. A negative kind means that
349 * the driver was loaded with no force parameter (default), so we
350 * must both detect and identify the chip. A zero kind means that
351 * the driver was loaded with the force parameter, the detection
352 * step shall be skipped. A positive kind means that the driver
353 * was loaded with the force parameter and a given kind of chip is
354 * requested, so both the detection and the identification steps
355 * are skipped.
356 */
357 config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
358 if (kind < 0) { /* detection */
359 if ((config & 0x80) != 0x00
360 || (i2c_smbus_read_byte_data(new_client,
361 ADM1025_REG_STATUS1) & 0xC0) != 0x00
362 || (i2c_smbus_read_byte_data(new_client,
363 ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
364 dev_dbg(&adapter->dev,
365 "ADM1025 detection failed at 0x%02x.\n",
366 address);
367 goto exit_free;
368 }
369 }
370
371 if (kind <= 0) { /* identification */
372 u8 man_id, chip_id;
373
374 man_id = i2c_smbus_read_byte_data(new_client,
375 ADM1025_REG_MAN_ID);
376 chip_id = i2c_smbus_read_byte_data(new_client,
377 ADM1025_REG_CHIP_ID);
378
379 if (man_id == 0x41) { /* Analog Devices */
380 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
381 kind = adm1025;
382 }
383 } else
384 if (man_id == 0xA1) { /* Philips */
385 if (address != 0x2E
386 && (chip_id & 0xF0) == 0x20) { /* NE1619 */
387 kind = ne1619;
388 }
389 }
390
391 if (kind <= 0) { /* identification failed */
392 dev_info(&adapter->dev,
393 "Unsupported chip (man_id=0x%02X, "
394 "chip_id=0x%02X).\n", man_id, chip_id);
395 goto exit_free;
396 }
397 }
398
399 if (kind == adm1025) {
400 name = "adm1025";
401 } else if (kind == ne1619) {
402 name = "ne1619";
403 }
404
405 /* We can fill in the remaining client fields */
406 strlcpy(new_client->name, name, I2C_NAME_SIZE);
407 data->valid = 0;
408 init_MUTEX(&data->update_lock);
409
410 /* Tell the I2C layer a new client has arrived */
411 if ((err = i2c_attach_client(new_client)))
412 goto exit_free;
413
414 /* Initialize the ADM1025 chip */
415 adm1025_init_client(new_client);
416
417 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400418 data->class_dev = hwmon_device_register(&new_client->dev);
419 if (IS_ERR(data->class_dev)) {
420 err = PTR_ERR(data->class_dev);
421 goto exit_detach;
422 }
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 device_create_file(&new_client->dev, &dev_attr_in0_input);
425 device_create_file(&new_client->dev, &dev_attr_in1_input);
426 device_create_file(&new_client->dev, &dev_attr_in2_input);
427 device_create_file(&new_client->dev, &dev_attr_in3_input);
428 device_create_file(&new_client->dev, &dev_attr_in5_input);
429 device_create_file(&new_client->dev, &dev_attr_in0_min);
430 device_create_file(&new_client->dev, &dev_attr_in1_min);
431 device_create_file(&new_client->dev, &dev_attr_in2_min);
432 device_create_file(&new_client->dev, &dev_attr_in3_min);
433 device_create_file(&new_client->dev, &dev_attr_in5_min);
434 device_create_file(&new_client->dev, &dev_attr_in0_max);
435 device_create_file(&new_client->dev, &dev_attr_in1_max);
436 device_create_file(&new_client->dev, &dev_attr_in2_max);
437 device_create_file(&new_client->dev, &dev_attr_in3_max);
438 device_create_file(&new_client->dev, &dev_attr_in5_max);
439 device_create_file(&new_client->dev, &dev_attr_temp1_input);
440 device_create_file(&new_client->dev, &dev_attr_temp2_input);
441 device_create_file(&new_client->dev, &dev_attr_temp1_min);
442 device_create_file(&new_client->dev, &dev_attr_temp2_min);
443 device_create_file(&new_client->dev, &dev_attr_temp1_max);
444 device_create_file(&new_client->dev, &dev_attr_temp2_max);
445 device_create_file(&new_client->dev, &dev_attr_alarms);
Grant Coady937df8d2005-05-12 11:59:29 +1000446 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 device_create_file(&new_client->dev, &dev_attr_vrm);
448
449 /* Pin 11 is either in4 (+12V) or VID4 */
450 if (!(config & 0x20)) {
451 device_create_file(&new_client->dev, &dev_attr_in4_input);
452 device_create_file(&new_client->dev, &dev_attr_in4_min);
453 device_create_file(&new_client->dev, &dev_attr_in4_max);
454 }
455
456 return 0;
457
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400458exit_detach:
459 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460exit_free:
461 kfree(data);
462exit:
463 return err;
464}
465
466static void adm1025_init_client(struct i2c_client *client)
467{
468 u8 reg;
469 struct adm1025_data *data = i2c_get_clientdata(client);
470 int i;
471
Jean Delvare303760b2005-07-31 21:52:01 +0200472 data->vrm = vid_which_vrm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 /*
475 * Set high limits
476 * Usually we avoid setting limits on driver init, but it happens
477 * that the ADM1025 comes with stupid default limits (all registers
478 * set to 0). In case the chip has not gone through any limit
479 * setting yet, we better set the high limits to the max so that
480 * no alarm triggers.
481 */
482 for (i=0; i<6; i++) {
483 reg = i2c_smbus_read_byte_data(client,
484 ADM1025_REG_IN_MAX(i));
485 if (reg == 0)
486 i2c_smbus_write_byte_data(client,
487 ADM1025_REG_IN_MAX(i),
488 0xFF);
489 }
490 for (i=0; i<2; i++) {
491 reg = i2c_smbus_read_byte_data(client,
492 ADM1025_REG_TEMP_HIGH(i));
493 if (reg == 0)
494 i2c_smbus_write_byte_data(client,
495 ADM1025_REG_TEMP_HIGH(i),
496 0x7F);
497 }
498
499 /*
500 * Start the conversions
501 */
502 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
503 if (!(reg & 0x01))
504 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
505 (reg&0x7E)|0x01);
506}
507
508static int adm1025_detach_client(struct i2c_client *client)
509{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400510 struct adm1025_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 int err;
512
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400513 hwmon_device_unregister(data->class_dev);
514
Jean Delvare7bef5592005-07-27 22:14:49 +0200515 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400518 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 return 0;
520}
521
522static struct adm1025_data *adm1025_update_device(struct device *dev)
523{
524 struct i2c_client *client = to_i2c_client(dev);
525 struct adm1025_data *data = i2c_get_clientdata(client);
526
527 down(&data->update_lock);
528
529 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
530 int i;
531
532 dev_dbg(&client->dev, "Updating data.\n");
533 for (i=0; i<6; i++) {
534 data->in[i] = i2c_smbus_read_byte_data(client,
535 ADM1025_REG_IN(i));
536 data->in_min[i] = i2c_smbus_read_byte_data(client,
537 ADM1025_REG_IN_MIN(i));
538 data->in_max[i] = i2c_smbus_read_byte_data(client,
539 ADM1025_REG_IN_MAX(i));
540 }
541 for (i=0; i<2; i++) {
542 data->temp[i] = i2c_smbus_read_byte_data(client,
543 ADM1025_REG_TEMP(i));
544 data->temp_min[i] = i2c_smbus_read_byte_data(client,
545 ADM1025_REG_TEMP_LOW(i));
546 data->temp_max[i] = i2c_smbus_read_byte_data(client,
547 ADM1025_REG_TEMP_HIGH(i));
548 }
549 data->alarms = i2c_smbus_read_byte_data(client,
550 ADM1025_REG_STATUS1)
551 | (i2c_smbus_read_byte_data(client,
552 ADM1025_REG_STATUS2) << 8);
553 data->vid = (i2c_smbus_read_byte_data(client,
554 ADM1025_REG_VID) & 0x0f)
555 | ((i2c_smbus_read_byte_data(client,
556 ADM1025_REG_VID4) & 0x01) << 4);
557
558 data->last_updated = jiffies;
559 data->valid = 1;
560 }
561
562 up(&data->update_lock);
563
564 return data;
565}
566
567static int __init sensors_adm1025_init(void)
568{
569 return i2c_add_driver(&adm1025_driver);
570}
571
572static void __exit sensors_adm1025_exit(void)
573{
574 i2c_del_driver(&adm1025_driver);
575}
576
577MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
578MODULE_DESCRIPTION("ADM1025 driver");
579MODULE_LICENSE("GPL");
580
581module_init(sensors_adm1025_init);
582module_exit(sensors_adm1025_exit);