blob: 3ec12421694f591df0de7c1e43ea924c331af1c1 [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 = {
121 .owner = THIS_MODULE,
122 .name = "adm1025",
123 .id = I2C_DRIVERID_ADM1025,
124 .flags = I2C_DF_NOTIFY,
125 .attach_adapter = adm1025_attach_adapter,
126 .detach_client = adm1025_detach_client,
127};
128
129/*
130 * Client data (each client gets its own)
131 */
132
133struct adm1025_data {
134 struct i2c_client client;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400135 struct class_device *class_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 struct semaphore update_lock;
137 char valid; /* zero until following fields are valid */
138 unsigned long last_updated; /* in jiffies */
139
140 u8 in[6]; /* register value */
141 u8 in_max[6]; /* register value */
142 u8 in_min[6]; /* register value */
143 s8 temp[2]; /* register value */
144 s8 temp_min[2]; /* register value */
145 s8 temp_max[2]; /* register value */
146 u16 alarms; /* register values, combined */
147 u8 vid; /* register values, combined */
148 u8 vrm;
149};
150
151/*
152 * Sysfs stuff
153 */
154
155#define show_in(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400156static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{ \
158 struct adm1025_data *data = adm1025_update_device(dev); \
159 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
160 in_scale[offset])); \
161} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400162static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{ \
164 struct adm1025_data *data = adm1025_update_device(dev); \
165 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
166 in_scale[offset])); \
167} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400168static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{ \
170 struct adm1025_data *data = adm1025_update_device(dev); \
171 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
172 in_scale[offset])); \
173} \
174static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
175show_in(0);
176show_in(1);
177show_in(2);
178show_in(3);
179show_in(4);
180show_in(5);
181
182#define show_temp(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400183static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{ \
185 struct adm1025_data *data = adm1025_update_device(dev); \
186 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
187} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400188static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{ \
190 struct adm1025_data *data = adm1025_update_device(dev); \
191 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \
192} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400193static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{ \
195 struct adm1025_data *data = adm1025_update_device(dev); \
196 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \
197}\
198static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL);
199show_temp(1);
200show_temp(2);
201
202#define set_in(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400203static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 size_t count) \
205{ \
206 struct i2c_client *client = to_i2c_client(dev); \
207 struct adm1025_data *data = i2c_get_clientdata(client); \
208 long val = simple_strtol(buf, NULL, 10); \
209 \
210 down(&data->update_lock); \
211 data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \
212 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \
213 data->in_min[offset]); \
214 up(&data->update_lock); \
215 return count; \
216} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400217static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 size_t count) \
219{ \
220 struct i2c_client *client = to_i2c_client(dev); \
221 struct adm1025_data *data = i2c_get_clientdata(client); \
222 long val = simple_strtol(buf, NULL, 10); \
223 \
224 down(&data->update_lock); \
225 data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \
226 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \
227 data->in_max[offset]); \
228 up(&data->update_lock); \
229 return count; \
230} \
231static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
232 show_in##offset##_min, set_in##offset##_min); \
233static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
234 show_in##offset##_max, set_in##offset##_max);
235set_in(0);
236set_in(1);
237set_in(2);
238set_in(3);
239set_in(4);
240set_in(5);
241
242#define set_temp(offset) \
Yani Ioannou74880c02005-05-17 06:41:12 -0400243static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 size_t count) \
245{ \
246 struct i2c_client *client = to_i2c_client(dev); \
247 struct adm1025_data *data = i2c_get_clientdata(client); \
248 long val = simple_strtol(buf, NULL, 10); \
249 \
250 down(&data->update_lock); \
251 data->temp_min[offset-1] = TEMP_TO_REG(val); \
252 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \
253 data->temp_min[offset-1]); \
254 up(&data->update_lock); \
255 return count; \
256} \
Yani Ioannou74880c02005-05-17 06:41:12 -0400257static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 size_t count) \
259{ \
260 struct i2c_client *client = to_i2c_client(dev); \
261 struct adm1025_data *data = i2c_get_clientdata(client); \
262 long val = simple_strtol(buf, NULL, 10); \
263 \
264 down(&data->update_lock); \
265 data->temp_max[offset-1] = TEMP_TO_REG(val); \
266 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \
267 data->temp_max[offset-1]); \
268 up(&data->update_lock); \
269 return count; \
270} \
271static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
272 show_temp##offset##_min, set_temp##offset##_min); \
273static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
274 show_temp##offset##_max, set_temp##offset##_max);
275set_temp(1);
276set_temp(2);
277
Yani Ioannou74880c02005-05-17 06:41:12 -0400278static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279{
280 struct adm1025_data *data = adm1025_update_device(dev);
281 return sprintf(buf, "%u\n", data->alarms);
282}
283static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
284
Yani Ioannou74880c02005-05-17 06:41:12 -0400285static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
287 struct adm1025_data *data = adm1025_update_device(dev);
288 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
289}
Grant Coady937df8d2005-05-12 11:59:29 +1000290/* in1_ref is deprecated in favour of cpu0_vid, remove after 2005-11-11 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291static DEVICE_ATTR(in1_ref, S_IRUGO, show_vid, NULL);
Grant Coady937df8d2005-05-12 11:59:29 +1000292static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Yani Ioannou74880c02005-05-17 06:41:12 -0400294static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
296 struct adm1025_data *data = adm1025_update_device(dev);
297 return sprintf(buf, "%u\n", data->vrm);
298}
Yani Ioannou74880c02005-05-17 06:41:12 -0400299static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
301 struct i2c_client *client = to_i2c_client(dev);
302 struct adm1025_data *data = i2c_get_clientdata(client);
303 data->vrm = simple_strtoul(buf, NULL, 10);
304 return count;
305}
306static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
307
308/*
309 * Real code
310 */
311
312static int adm1025_attach_adapter(struct i2c_adapter *adapter)
313{
314 if (!(adapter->class & I2C_CLASS_HWMON))
315 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200316 return i2c_probe(adapter, &addr_data, adm1025_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317}
318
319/*
320 * The following function does more than just detection. If detection
321 * succeeds, it also registers the new chip.
322 */
323static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
324{
325 struct i2c_client *new_client;
326 struct adm1025_data *data;
327 int err = 0;
328 const char *name = "";
329 u8 config;
330
331 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
332 goto exit;
333
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200334 if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 err = -ENOMEM;
336 goto exit;
337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 /* The common I2C client data is placed right before the
340 ADM1025-specific data. */
341 new_client = &data->client;
342 i2c_set_clientdata(new_client, data);
343 new_client->addr = address;
344 new_client->adapter = adapter;
345 new_client->driver = &adm1025_driver;
346 new_client->flags = 0;
347
348 /*
349 * Now we do the remaining detection. A negative kind means that
350 * the driver was loaded with no force parameter (default), so we
351 * must both detect and identify the chip. A zero kind means that
352 * the driver was loaded with the force parameter, the detection
353 * step shall be skipped. A positive kind means that the driver
354 * was loaded with the force parameter and a given kind of chip is
355 * requested, so both the detection and the identification steps
356 * are skipped.
357 */
358 config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
359 if (kind < 0) { /* detection */
360 if ((config & 0x80) != 0x00
361 || (i2c_smbus_read_byte_data(new_client,
362 ADM1025_REG_STATUS1) & 0xC0) != 0x00
363 || (i2c_smbus_read_byte_data(new_client,
364 ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
365 dev_dbg(&adapter->dev,
366 "ADM1025 detection failed at 0x%02x.\n",
367 address);
368 goto exit_free;
369 }
370 }
371
372 if (kind <= 0) { /* identification */
373 u8 man_id, chip_id;
374
375 man_id = i2c_smbus_read_byte_data(new_client,
376 ADM1025_REG_MAN_ID);
377 chip_id = i2c_smbus_read_byte_data(new_client,
378 ADM1025_REG_CHIP_ID);
379
380 if (man_id == 0x41) { /* Analog Devices */
381 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
382 kind = adm1025;
383 }
384 } else
385 if (man_id == 0xA1) { /* Philips */
386 if (address != 0x2E
387 && (chip_id & 0xF0) == 0x20) { /* NE1619 */
388 kind = ne1619;
389 }
390 }
391
392 if (kind <= 0) { /* identification failed */
393 dev_info(&adapter->dev,
394 "Unsupported chip (man_id=0x%02X, "
395 "chip_id=0x%02X).\n", man_id, chip_id);
396 goto exit_free;
397 }
398 }
399
400 if (kind == adm1025) {
401 name = "adm1025";
402 } else if (kind == ne1619) {
403 name = "ne1619";
404 }
405
406 /* We can fill in the remaining client fields */
407 strlcpy(new_client->name, name, I2C_NAME_SIZE);
408 data->valid = 0;
409 init_MUTEX(&data->update_lock);
410
411 /* Tell the I2C layer a new client has arrived */
412 if ((err = i2c_attach_client(new_client)))
413 goto exit_free;
414
415 /* Initialize the ADM1025 chip */
416 adm1025_init_client(new_client);
417
418 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400419 data->class_dev = hwmon_device_register(&new_client->dev);
420 if (IS_ERR(data->class_dev)) {
421 err = PTR_ERR(data->class_dev);
422 goto exit_detach;
423 }
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 device_create_file(&new_client->dev, &dev_attr_in0_input);
426 device_create_file(&new_client->dev, &dev_attr_in1_input);
427 device_create_file(&new_client->dev, &dev_attr_in2_input);
428 device_create_file(&new_client->dev, &dev_attr_in3_input);
429 device_create_file(&new_client->dev, &dev_attr_in5_input);
430 device_create_file(&new_client->dev, &dev_attr_in0_min);
431 device_create_file(&new_client->dev, &dev_attr_in1_min);
432 device_create_file(&new_client->dev, &dev_attr_in2_min);
433 device_create_file(&new_client->dev, &dev_attr_in3_min);
434 device_create_file(&new_client->dev, &dev_attr_in5_min);
435 device_create_file(&new_client->dev, &dev_attr_in0_max);
436 device_create_file(&new_client->dev, &dev_attr_in1_max);
437 device_create_file(&new_client->dev, &dev_attr_in2_max);
438 device_create_file(&new_client->dev, &dev_attr_in3_max);
439 device_create_file(&new_client->dev, &dev_attr_in5_max);
440 device_create_file(&new_client->dev, &dev_attr_temp1_input);
441 device_create_file(&new_client->dev, &dev_attr_temp2_input);
442 device_create_file(&new_client->dev, &dev_attr_temp1_min);
443 device_create_file(&new_client->dev, &dev_attr_temp2_min);
444 device_create_file(&new_client->dev, &dev_attr_temp1_max);
445 device_create_file(&new_client->dev, &dev_attr_temp2_max);
446 device_create_file(&new_client->dev, &dev_attr_alarms);
Grant Coady937df8d2005-05-12 11:59:29 +1000447 /* in1_ref is deprecated, remove after 2005-11-11 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 device_create_file(&new_client->dev, &dev_attr_in1_ref);
Grant Coady937df8d2005-05-12 11:59:29 +1000449 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 device_create_file(&new_client->dev, &dev_attr_vrm);
451
452 /* Pin 11 is either in4 (+12V) or VID4 */
453 if (!(config & 0x20)) {
454 device_create_file(&new_client->dev, &dev_attr_in4_input);
455 device_create_file(&new_client->dev, &dev_attr_in4_min);
456 device_create_file(&new_client->dev, &dev_attr_in4_max);
457 }
458
459 return 0;
460
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400461exit_detach:
462 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463exit_free:
464 kfree(data);
465exit:
466 return err;
467}
468
469static void adm1025_init_client(struct i2c_client *client)
470{
471 u8 reg;
472 struct adm1025_data *data = i2c_get_clientdata(client);
473 int i;
474
Jean Delvare303760b2005-07-31 21:52:01 +0200475 data->vrm = vid_which_vrm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477 /*
478 * Set high limits
479 * Usually we avoid setting limits on driver init, but it happens
480 * that the ADM1025 comes with stupid default limits (all registers
481 * set to 0). In case the chip has not gone through any limit
482 * setting yet, we better set the high limits to the max so that
483 * no alarm triggers.
484 */
485 for (i=0; i<6; i++) {
486 reg = i2c_smbus_read_byte_data(client,
487 ADM1025_REG_IN_MAX(i));
488 if (reg == 0)
489 i2c_smbus_write_byte_data(client,
490 ADM1025_REG_IN_MAX(i),
491 0xFF);
492 }
493 for (i=0; i<2; i++) {
494 reg = i2c_smbus_read_byte_data(client,
495 ADM1025_REG_TEMP_HIGH(i));
496 if (reg == 0)
497 i2c_smbus_write_byte_data(client,
498 ADM1025_REG_TEMP_HIGH(i),
499 0x7F);
500 }
501
502 /*
503 * Start the conversions
504 */
505 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
506 if (!(reg & 0x01))
507 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
508 (reg&0x7E)|0x01);
509}
510
511static int adm1025_detach_client(struct i2c_client *client)
512{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400513 struct adm1025_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 int err;
515
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400516 hwmon_device_unregister(data->class_dev);
517
Jean Delvare7bef5592005-07-27 22:14:49 +0200518 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400521 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 return 0;
523}
524
525static struct adm1025_data *adm1025_update_device(struct device *dev)
526{
527 struct i2c_client *client = to_i2c_client(dev);
528 struct adm1025_data *data = i2c_get_clientdata(client);
529
530 down(&data->update_lock);
531
532 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
533 int i;
534
535 dev_dbg(&client->dev, "Updating data.\n");
536 for (i=0; i<6; i++) {
537 data->in[i] = i2c_smbus_read_byte_data(client,
538 ADM1025_REG_IN(i));
539 data->in_min[i] = i2c_smbus_read_byte_data(client,
540 ADM1025_REG_IN_MIN(i));
541 data->in_max[i] = i2c_smbus_read_byte_data(client,
542 ADM1025_REG_IN_MAX(i));
543 }
544 for (i=0; i<2; i++) {
545 data->temp[i] = i2c_smbus_read_byte_data(client,
546 ADM1025_REG_TEMP(i));
547 data->temp_min[i] = i2c_smbus_read_byte_data(client,
548 ADM1025_REG_TEMP_LOW(i));
549 data->temp_max[i] = i2c_smbus_read_byte_data(client,
550 ADM1025_REG_TEMP_HIGH(i));
551 }
552 data->alarms = i2c_smbus_read_byte_data(client,
553 ADM1025_REG_STATUS1)
554 | (i2c_smbus_read_byte_data(client,
555 ADM1025_REG_STATUS2) << 8);
556 data->vid = (i2c_smbus_read_byte_data(client,
557 ADM1025_REG_VID) & 0x0f)
558 | ((i2c_smbus_read_byte_data(client,
559 ADM1025_REG_VID4) & 0x01) << 4);
560
561 data->last_updated = jiffies;
562 data->valid = 1;
563 }
564
565 up(&data->update_lock);
566
567 return data;
568}
569
570static int __init sensors_adm1025_init(void)
571{
572 return i2c_add_driver(&adm1025_driver);
573}
574
575static void __exit sensors_adm1025_exit(void)
576{
577 i2c_del_driver(&adm1025_driver);
578}
579
580MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
581MODULE_DESCRIPTION("ADM1025 driver");
582MODULE_LICENSE("GPL");
583
584module_init(sensors_adm1025_init);
585module_exit(sensors_adm1025_exit);