blob: 9331c56d2ba6d6acfd022880a8be90d8dbc94560 [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 = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100122 .name = "adm1025",
123 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 .id = I2C_DRIVERID_ADM1025,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .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 +1000290static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
Yani Ioannou74880c02005-05-17 06:41:12 -0400292static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
294 struct adm1025_data *data = adm1025_update_device(dev);
295 return sprintf(buf, "%u\n", data->vrm);
296}
Yani Ioannou74880c02005-05-17 06:41:12 -0400297static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
299 struct i2c_client *client = to_i2c_client(dev);
300 struct adm1025_data *data = i2c_get_clientdata(client);
301 data->vrm = simple_strtoul(buf, NULL, 10);
302 return count;
303}
304static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
305
306/*
307 * Real code
308 */
309
310static int adm1025_attach_adapter(struct i2c_adapter *adapter)
311{
312 if (!(adapter->class & I2C_CLASS_HWMON))
313 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200314 return i2c_probe(adapter, &addr_data, adm1025_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
317/*
318 * The following function does more than just detection. If detection
319 * succeeds, it also registers the new chip.
320 */
321static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
322{
323 struct i2c_client *new_client;
324 struct adm1025_data *data;
325 int err = 0;
326 const char *name = "";
327 u8 config;
328
329 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
330 goto exit;
331
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200332 if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 err = -ENOMEM;
334 goto exit;
335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 /* The common I2C client data is placed right before the
338 ADM1025-specific data. */
339 new_client = &data->client;
340 i2c_set_clientdata(new_client, data);
341 new_client->addr = address;
342 new_client->adapter = adapter;
343 new_client->driver = &adm1025_driver;
344 new_client->flags = 0;
345
346 /*
347 * Now we do the remaining detection. A negative kind means that
348 * the driver was loaded with no force parameter (default), so we
349 * must both detect and identify the chip. A zero kind means that
350 * the driver was loaded with the force parameter, the detection
351 * step shall be skipped. A positive kind means that the driver
352 * was loaded with the force parameter and a given kind of chip is
353 * requested, so both the detection and the identification steps
354 * are skipped.
355 */
356 config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
357 if (kind < 0) { /* detection */
358 if ((config & 0x80) != 0x00
359 || (i2c_smbus_read_byte_data(new_client,
360 ADM1025_REG_STATUS1) & 0xC0) != 0x00
361 || (i2c_smbus_read_byte_data(new_client,
362 ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
363 dev_dbg(&adapter->dev,
364 "ADM1025 detection failed at 0x%02x.\n",
365 address);
366 goto exit_free;
367 }
368 }
369
370 if (kind <= 0) { /* identification */
371 u8 man_id, chip_id;
372
373 man_id = i2c_smbus_read_byte_data(new_client,
374 ADM1025_REG_MAN_ID);
375 chip_id = i2c_smbus_read_byte_data(new_client,
376 ADM1025_REG_CHIP_ID);
377
378 if (man_id == 0x41) { /* Analog Devices */
379 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
380 kind = adm1025;
381 }
382 } else
383 if (man_id == 0xA1) { /* Philips */
384 if (address != 0x2E
385 && (chip_id & 0xF0) == 0x20) { /* NE1619 */
386 kind = ne1619;
387 }
388 }
389
390 if (kind <= 0) { /* identification failed */
391 dev_info(&adapter->dev,
392 "Unsupported chip (man_id=0x%02X, "
393 "chip_id=0x%02X).\n", man_id, chip_id);
394 goto exit_free;
395 }
396 }
397
398 if (kind == adm1025) {
399 name = "adm1025";
400 } else if (kind == ne1619) {
401 name = "ne1619";
402 }
403
404 /* We can fill in the remaining client fields */
405 strlcpy(new_client->name, name, I2C_NAME_SIZE);
406 data->valid = 0;
407 init_MUTEX(&data->update_lock);
408
409 /* Tell the I2C layer a new client has arrived */
410 if ((err = i2c_attach_client(new_client)))
411 goto exit_free;
412
413 /* Initialize the ADM1025 chip */
414 adm1025_init_client(new_client);
415
416 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400417 data->class_dev = hwmon_device_register(&new_client->dev);
418 if (IS_ERR(data->class_dev)) {
419 err = PTR_ERR(data->class_dev);
420 goto exit_detach;
421 }
422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 device_create_file(&new_client->dev, &dev_attr_in0_input);
424 device_create_file(&new_client->dev, &dev_attr_in1_input);
425 device_create_file(&new_client->dev, &dev_attr_in2_input);
426 device_create_file(&new_client->dev, &dev_attr_in3_input);
427 device_create_file(&new_client->dev, &dev_attr_in5_input);
428 device_create_file(&new_client->dev, &dev_attr_in0_min);
429 device_create_file(&new_client->dev, &dev_attr_in1_min);
430 device_create_file(&new_client->dev, &dev_attr_in2_min);
431 device_create_file(&new_client->dev, &dev_attr_in3_min);
432 device_create_file(&new_client->dev, &dev_attr_in5_min);
433 device_create_file(&new_client->dev, &dev_attr_in0_max);
434 device_create_file(&new_client->dev, &dev_attr_in1_max);
435 device_create_file(&new_client->dev, &dev_attr_in2_max);
436 device_create_file(&new_client->dev, &dev_attr_in3_max);
437 device_create_file(&new_client->dev, &dev_attr_in5_max);
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_temp1_min);
441 device_create_file(&new_client->dev, &dev_attr_temp2_min);
442 device_create_file(&new_client->dev, &dev_attr_temp1_max);
443 device_create_file(&new_client->dev, &dev_attr_temp2_max);
444 device_create_file(&new_client->dev, &dev_attr_alarms);
Grant Coady937df8d2005-05-12 11:59:29 +1000445 device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 device_create_file(&new_client->dev, &dev_attr_vrm);
447
448 /* Pin 11 is either in4 (+12V) or VID4 */
449 if (!(config & 0x20)) {
450 device_create_file(&new_client->dev, &dev_attr_in4_input);
451 device_create_file(&new_client->dev, &dev_attr_in4_min);
452 device_create_file(&new_client->dev, &dev_attr_in4_max);
453 }
454
455 return 0;
456
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400457exit_detach:
458 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459exit_free:
460 kfree(data);
461exit:
462 return err;
463}
464
465static void adm1025_init_client(struct i2c_client *client)
466{
467 u8 reg;
468 struct adm1025_data *data = i2c_get_clientdata(client);
469 int i;
470
Jean Delvare303760b2005-07-31 21:52:01 +0200471 data->vrm = vid_which_vrm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473 /*
474 * Set high limits
475 * Usually we avoid setting limits on driver init, but it happens
476 * that the ADM1025 comes with stupid default limits (all registers
477 * set to 0). In case the chip has not gone through any limit
478 * setting yet, we better set the high limits to the max so that
479 * no alarm triggers.
480 */
481 for (i=0; i<6; i++) {
482 reg = i2c_smbus_read_byte_data(client,
483 ADM1025_REG_IN_MAX(i));
484 if (reg == 0)
485 i2c_smbus_write_byte_data(client,
486 ADM1025_REG_IN_MAX(i),
487 0xFF);
488 }
489 for (i=0; i<2; i++) {
490 reg = i2c_smbus_read_byte_data(client,
491 ADM1025_REG_TEMP_HIGH(i));
492 if (reg == 0)
493 i2c_smbus_write_byte_data(client,
494 ADM1025_REG_TEMP_HIGH(i),
495 0x7F);
496 }
497
498 /*
499 * Start the conversions
500 */
501 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
502 if (!(reg & 0x01))
503 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
504 (reg&0x7E)|0x01);
505}
506
507static int adm1025_detach_client(struct i2c_client *client)
508{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400509 struct adm1025_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 int err;
511
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400512 hwmon_device_unregister(data->class_dev);
513
Jean Delvare7bef5592005-07-27 22:14:49 +0200514 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400517 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return 0;
519}
520
521static struct adm1025_data *adm1025_update_device(struct device *dev)
522{
523 struct i2c_client *client = to_i2c_client(dev);
524 struct adm1025_data *data = i2c_get_clientdata(client);
525
526 down(&data->update_lock);
527
528 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
529 int i;
530
531 dev_dbg(&client->dev, "Updating data.\n");
532 for (i=0; i<6; i++) {
533 data->in[i] = i2c_smbus_read_byte_data(client,
534 ADM1025_REG_IN(i));
535 data->in_min[i] = i2c_smbus_read_byte_data(client,
536 ADM1025_REG_IN_MIN(i));
537 data->in_max[i] = i2c_smbus_read_byte_data(client,
538 ADM1025_REG_IN_MAX(i));
539 }
540 for (i=0; i<2; i++) {
541 data->temp[i] = i2c_smbus_read_byte_data(client,
542 ADM1025_REG_TEMP(i));
543 data->temp_min[i] = i2c_smbus_read_byte_data(client,
544 ADM1025_REG_TEMP_LOW(i));
545 data->temp_max[i] = i2c_smbus_read_byte_data(client,
546 ADM1025_REG_TEMP_HIGH(i));
547 }
548 data->alarms = i2c_smbus_read_byte_data(client,
549 ADM1025_REG_STATUS1)
550 | (i2c_smbus_read_byte_data(client,
551 ADM1025_REG_STATUS2) << 8);
552 data->vid = (i2c_smbus_read_byte_data(client,
553 ADM1025_REG_VID) & 0x0f)
554 | ((i2c_smbus_read_byte_data(client,
555 ADM1025_REG_VID4) & 0x01) << 4);
556
557 data->last_updated = jiffies;
558 data->valid = 1;
559 }
560
561 up(&data->update_lock);
562
563 return data;
564}
565
566static int __init sensors_adm1025_init(void)
567{
568 return i2c_add_driver(&adm1025_driver);
569}
570
571static void __exit sensors_adm1025_exit(void)
572{
573 i2c_del_driver(&adm1025_driver);
574}
575
576MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
577MODULE_DESCRIPTION("ADM1025 driver");
578MODULE_LICENSE("GPL");
579
580module_init(sensors_adm1025_init);
581module_exit(sensors_adm1025_exit);