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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * lm87.c
3 *
4 * Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl>
5 * Philip Edelbrock <phil@netroedge.com>
6 * Stephen Rousset <stephen.rousset@rocketlogix.com>
7 * Dan Eaton <dan.eaton@rocketlogix.com>
Jean Delvarea8884202008-07-16 19:30:14 +02008 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
10 * Original port to Linux 2.6 by Jeff Oliver.
11 *
12 * The LM87 is a sensor chip made by National Semiconductor. It monitors up
13 * to 8 voltages (including its own power source), up to three temperatures
14 * (its own plus up to two external ones) and up to two fans. The default
15 * configuration is 6 voltages, two temperatures and two fans (see below).
16 * Voltages are scaled internally with ratios such that the nominal value of
17 * each voltage correspond to a register value of 192 (which means a
18 * resolution of about 0.5% of the nominal value). Temperature values are
19 * reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
20 * datasheet can be obtained from National's website at:
21 * http://www.national.com/pf/LM/LM87.html
22 *
23 * Some functions share pins, so not all functions are available at the same
Ben Hutchings47064d62008-10-17 17:51:12 +020024 * time. Which are depends on the hardware setup. This driver normally
25 * assumes that firmware configured the chip correctly. Where this is not
26 * the case, platform code must set the I2C client's platform_data to point
27 * to a u8 value to be written to the channel register.
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 * For reference, here is the list of exclusive functions:
29 * - in0+in5 (default) or temp3
30 * - fan1 (default) or in6
31 * - fan2 (default) or in7
32 * - VID lines (default) or IRQ lines (not handled by this driver)
33 *
34 * The LM87 additionally features an analog output, supposedly usable to
35 * control the speed of a fan. All new chips use pulse width modulation
36 * instead. The LM87 is the only hardware monitoring chipset I know of
37 * which uses amplitude modulation. Be careful when using this feature.
38 *
Jean Delvarec7fa3732007-10-09 15:22:22 +020039 * This driver also supports the ADM1024, a sensor chip made by Analog
40 * Devices. That chip is fully compatible with the LM87. Complete
41 * datasheet can be obtained from Analog's website at:
42 * http://www.analog.com/en/prod/0,2877,ADM1024,00.html
43 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * This program is free software; you can redistribute it and/or modify
45 * it under the terms of the GNU General Public License as published by
46 * the Free Software Foundation; either version 2 of the License, or
47 * (at your option) any later version.
48 *
49 * This program is distributed in the hope that it will be useful,
50 * but WITHOUT ANY WARRANTY; without even the implied warranty of
51 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
52 * GNU General Public License for more details.
53 *
54 * You should have received a copy of the GNU General Public License
55 * along with this program; if not, write to the Free Software
56 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
57 */
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/module.h>
60#include <linux/init.h>
61#include <linux/slab.h>
62#include <linux/jiffies.h>
63#include <linux/i2c.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040064#include <linux/hwmon.h>
Jean Delvarec2803b92007-09-26 23:39:01 +020065#include <linux/hwmon-sysfs.h>
Jean Delvare303760b2005-07-31 21:52:01 +020066#include <linux/hwmon-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040067#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010068#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70/*
71 * Addresses to scan
72 * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
73 */
74
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050075static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77/*
78 * Insmod parameters
79 */
80
Jean Delvarec7fa3732007-10-09 15:22:22 +020081I2C_CLIENT_INSMOD_2(lm87, adm1024);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83/*
84 * The LM87 registers
85 */
86
87/* nr in 0..5 */
88#define LM87_REG_IN(nr) (0x20 + (nr))
89#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
90#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
91/* nr in 0..1 */
92#define LM87_REG_AIN(nr) (0x28 + (nr))
93#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
94#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
95
96static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
97static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
98static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
99
100#define LM87_REG_TEMP_HW_INT_LOCK 0x13
101#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
102#define LM87_REG_TEMP_HW_INT 0x17
103#define LM87_REG_TEMP_HW_EXT 0x18
104
105/* nr in 0..1 */
106#define LM87_REG_FAN(nr) (0x28 + (nr))
107#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
108#define LM87_REG_AOUT 0x19
109
110#define LM87_REG_CONFIG 0x40
111#define LM87_REG_CHANNEL_MODE 0x16
112#define LM87_REG_VID_FAN_DIV 0x47
113#define LM87_REG_VID4 0x49
114
115#define LM87_REG_ALARMS1 0x41
116#define LM87_REG_ALARMS2 0x42
117
118#define LM87_REG_COMPANY_ID 0x3E
119#define LM87_REG_REVISION 0x3F
120
121/*
122 * Conversions and various macros
123 * The LM87 uses signed 8-bit values for temperatures.
124 */
125
126#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
127#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
128 (val) * 192 >= (scale) * 255 ? 255 : \
129 ((val) * 192 + (scale)/2) / (scale))
130
131#define TEMP_FROM_REG(reg) ((reg) * 1000)
132#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
133 (val) >= 126500 ? 127 : \
134 (((val) < 0 ? (val)-500 : (val)+500) / 1000))
135
136#define FAN_FROM_REG(reg,div) ((reg) == 255 || (reg) == 0 ? 0 : \
Jean Delvareb965d4b2007-09-26 22:16:56 +0200137 (1350000 + (reg)*(div) / 2) / ((reg)*(div)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138#define FAN_TO_REG(val,div) ((val)*(div) * 255 <= 1350000 ? 255 : \
139 (1350000 + (val)*(div) / 2) / ((val)*(div)))
140
141#define FAN_DIV_FROM_REG(reg) (1 << (reg))
142
143/* analog out is 9.80mV/LSB */
144#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
145#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
146 (val) >= 2500 ? 255 : \
147 ((val) * 10 + 49) / 98)
148
149/* nr in 0..1 */
150#define CHAN_NO_FAN(nr) (1 << (nr))
151#define CHAN_TEMP3 (1 << 2)
152#define CHAN_VCC_5V (1 << 3)
Jean Delvare889af3d2007-10-08 22:48:10 +0200153#define CHAN_NO_VID (1 << 7)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155/*
156 * Functions declaration
157 */
158
Jean Delvarea8884202008-07-16 19:30:14 +0200159static int lm87_probe(struct i2c_client *client,
160 const struct i2c_device_id *id);
Jean Delvare310ec792009-12-14 21:17:23 +0100161static int lm87_detect(struct i2c_client *new_client,
Jean Delvarea8884202008-07-16 19:30:14 +0200162 struct i2c_board_info *info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163static void lm87_init_client(struct i2c_client *client);
Jean Delvarea8884202008-07-16 19:30:14 +0200164static int lm87_remove(struct i2c_client *client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165static struct lm87_data *lm87_update_device(struct device *dev);
166
167/*
168 * Driver data (common to all clients)
169 */
170
Jean Delvarea8884202008-07-16 19:30:14 +0200171static const struct i2c_device_id lm87_id[] = {
172 { "lm87", lm87 },
173 { "adm1024", adm1024 },
174 { }
175};
176MODULE_DEVICE_TABLE(i2c, lm87_id);
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178static struct i2c_driver lm87_driver = {
Jean Delvarea8884202008-07-16 19:30:14 +0200179 .class = I2C_CLASS_HWMON,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100180 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100181 .name = "lm87",
182 },
Jean Delvarea8884202008-07-16 19:30:14 +0200183 .probe = lm87_probe,
184 .remove = lm87_remove,
185 .id_table = lm87_id,
186 .detect = lm87_detect,
187 .address_data = &addr_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188};
189
190/*
191 * Client data (each client gets its own)
192 */
193
194struct lm87_data {
Tony Jones1beeffe2007-08-20 13:46:20 -0700195 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100196 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 char valid; /* zero until following fields are valid */
198 unsigned long last_updated; /* In jiffies */
199
200 u8 channel; /* register value */
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200201 u8 config; /* original register value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 u8 in[8]; /* register value */
204 u8 in_max[8]; /* register value */
205 u8 in_min[8]; /* register value */
206 u16 in_scale[8];
207
208 s8 temp[3]; /* register value */
209 s8 temp_high[3]; /* register value */
210 s8 temp_low[3]; /* register value */
211 s8 temp_crit_int; /* min of two register values */
212 s8 temp_crit_ext; /* min of two register values */
213
214 u8 fan[2]; /* register value */
215 u8 fan_min[2]; /* register value */
216 u8 fan_div[2]; /* register value, shifted right */
217 u8 aout; /* register value */
218
219 u16 alarms; /* register values, combined */
220 u8 vid; /* register values, combined */
221 u8 vrm;
222};
223
224/*
225 * Sysfs stuff
226 */
227
228static inline int lm87_read_value(struct i2c_client *client, u8 reg)
229{
230 return i2c_smbus_read_byte_data(client, reg);
231}
232
233static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
234{
235 return i2c_smbus_write_byte_data(client, reg, value);
236}
237
238#define show_in(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400239static ssize_t show_in##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{ \
241 struct lm87_data *data = lm87_update_device(dev); \
242 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
243 data->in_scale[offset])); \
244} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400245static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{ \
247 struct lm87_data *data = lm87_update_device(dev); \
248 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
249 data->in_scale[offset])); \
250} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400251static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{ \
253 struct lm87_data *data = lm87_update_device(dev); \
254 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
255 data->in_scale[offset])); \
256} \
257static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
258 show_in##offset##_input, NULL);
259show_in(0);
260show_in(1);
261show_in(2);
262show_in(3);
263show_in(4);
264show_in(5);
265show_in(6);
266show_in(7);
267
268static void set_in_min(struct device *dev, const char *buf, int nr)
269{
270 struct i2c_client *client = to_i2c_client(dev);
271 struct lm87_data *data = i2c_get_clientdata(client);
272 long val = simple_strtol(buf, NULL, 10);
273
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100274 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
276 lm87_write_value(client, nr<6 ? LM87_REG_IN_MIN(nr) :
277 LM87_REG_AIN_MIN(nr-6), data->in_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100278 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
281static void set_in_max(struct device *dev, const char *buf, int nr)
282{
283 struct i2c_client *client = to_i2c_client(dev);
284 struct lm87_data *data = i2c_get_clientdata(client);
285 long val = simple_strtol(buf, NULL, 10);
286
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100287 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
289 lm87_write_value(client, nr<6 ? LM87_REG_IN_MAX(nr) :
290 LM87_REG_AIN_MAX(nr-6), data->in_max[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100291 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292}
293
294#define set_in(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400295static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 const char *buf, size_t count) \
297{ \
298 set_in_min(dev, buf, offset); \
299 return count; \
300} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400301static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 const char *buf, size_t count) \
303{ \
304 set_in_max(dev, buf, offset); \
305 return count; \
306} \
307static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
308 show_in##offset##_min, set_in##offset##_min); \
309static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
310 show_in##offset##_max, set_in##offset##_max);
311set_in(0);
312set_in(1);
313set_in(2);
314set_in(3);
315set_in(4);
316set_in(5);
317set_in(6);
318set_in(7);
319
320#define show_temp(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400321static ssize_t show_temp##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{ \
323 struct lm87_data *data = lm87_update_device(dev); \
324 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
325} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400326static ssize_t show_temp##offset##_low(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{ \
328 struct lm87_data *data = lm87_update_device(dev); \
329 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
330} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400331static ssize_t show_temp##offset##_high(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{ \
333 struct lm87_data *data = lm87_update_device(dev); \
334 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
335}\
336static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
337 show_temp##offset##_input, NULL);
338show_temp(1);
339show_temp(2);
340show_temp(3);
341
342static void set_temp_low(struct device *dev, const char *buf, int nr)
343{
344 struct i2c_client *client = to_i2c_client(dev);
345 struct lm87_data *data = i2c_get_clientdata(client);
346 long val = simple_strtol(buf, NULL, 10);
347
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100348 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 data->temp_low[nr] = TEMP_TO_REG(val);
350 lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100351 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352}
353
354static void set_temp_high(struct device *dev, const char *buf, int nr)
355{
356 struct i2c_client *client = to_i2c_client(dev);
357 struct lm87_data *data = i2c_get_clientdata(client);
358 long val = simple_strtol(buf, NULL, 10);
359
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100360 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 data->temp_high[nr] = TEMP_TO_REG(val);
362 lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100363 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364}
365
366#define set_temp(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400367static ssize_t set_temp##offset##_low(struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 const char *buf, size_t count) \
369{ \
370 set_temp_low(dev, buf, offset-1); \
371 return count; \
372} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400373static ssize_t set_temp##offset##_high(struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 const char *buf, size_t count) \
375{ \
376 set_temp_high(dev, buf, offset-1); \
377 return count; \
378} \
379static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
380 show_temp##offset##_high, set_temp##offset##_high); \
381static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
382 show_temp##offset##_low, set_temp##offset##_low);
383set_temp(1);
384set_temp(2);
385set_temp(3);
386
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400387static ssize_t show_temp_crit_int(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
389 struct lm87_data *data = lm87_update_device(dev);
390 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
391}
392
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400393static ssize_t show_temp_crit_ext(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
395 struct lm87_data *data = lm87_update_device(dev);
396 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
397}
398
399static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
400static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
401static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
402
403#define show_fan(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400404static ssize_t show_fan##offset##_input(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405{ \
406 struct lm87_data *data = lm87_update_device(dev); \
407 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
408 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
409} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400410static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{ \
412 struct lm87_data *data = lm87_update_device(dev); \
413 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
414 FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
415} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400416static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{ \
418 struct lm87_data *data = lm87_update_device(dev); \
419 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
420} \
421static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
422 show_fan##offset##_input, NULL);
423show_fan(1);
424show_fan(2);
425
426static void set_fan_min(struct device *dev, const char *buf, int nr)
427{
428 struct i2c_client *client = to_i2c_client(dev);
429 struct lm87_data *data = i2c_get_clientdata(client);
430 long val = simple_strtol(buf, NULL, 10);
431
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100432 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 data->fan_min[nr] = FAN_TO_REG(val,
434 FAN_DIV_FROM_REG(data->fan_div[nr]));
435 lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100436 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437}
438
439/* Note: we save and restore the fan minimum here, because its value is
440 determined in part by the fan clock divider. This follows the principle
Andreas Mohrd6e05ed2006-06-26 18:35:02 +0200441 of least surprise; the user doesn't expect the fan minimum to change just
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 because the divider changed. */
443static ssize_t set_fan_div(struct device *dev, const char *buf,
444 size_t count, int nr)
445{
446 struct i2c_client *client = to_i2c_client(dev);
447 struct lm87_data *data = i2c_get_clientdata(client);
448 long val = simple_strtol(buf, NULL, 10);
449 unsigned long min;
450 u8 reg;
451
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100452 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 min = FAN_FROM_REG(data->fan_min[nr],
454 FAN_DIV_FROM_REG(data->fan_div[nr]));
455
456 switch (val) {
457 case 1: data->fan_div[nr] = 0; break;
458 case 2: data->fan_div[nr] = 1; break;
459 case 4: data->fan_div[nr] = 2; break;
460 case 8: data->fan_div[nr] = 3; break;
461 default:
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100462 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 return -EINVAL;
464 }
465
466 reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
467 switch (nr) {
468 case 0:
469 reg = (reg & 0xCF) | (data->fan_div[0] << 4);
470 break;
471 case 1:
472 reg = (reg & 0x3F) | (data->fan_div[1] << 6);
473 break;
474 }
475 lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
476
477 data->fan_min[nr] = FAN_TO_REG(min, val);
478 lm87_write_value(client, LM87_REG_FAN_MIN(nr),
479 data->fan_min[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100480 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482 return count;
483}
484
485#define set_fan(offset) \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400486static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 size_t count) \
488{ \
489 set_fan_min(dev, buf, offset-1); \
490 return count; \
491} \
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400492static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 size_t count) \
494{ \
495 return set_fan_div(dev, buf, count, offset-1); \
496} \
497static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
498 show_fan##offset##_min, set_fan##offset##_min); \
499static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
500 show_fan##offset##_div, set_fan##offset##_div);
501set_fan(1);
502set_fan(2);
503
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400504static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505{
506 struct lm87_data *data = lm87_update_device(dev);
507 return sprintf(buf, "%d\n", data->alarms);
508}
509static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
510
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400511static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512{
513 struct lm87_data *data = lm87_update_device(dev);
514 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
515}
516static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
517
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400518static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Jean Delvare90d66192007-10-08 18:24:35 +0200520 struct lm87_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 return sprintf(buf, "%d\n", data->vrm);
522}
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400523static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
Jean Delvare8f74efe2007-12-01 11:25:33 +0100525 struct lm87_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 data->vrm = simple_strtoul(buf, NULL, 10);
527 return count;
528}
529static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
530
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400531static ssize_t show_aout(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
533 struct lm87_data *data = lm87_update_device(dev);
534 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
535}
Yani Ioannou8627f9b2005-05-17 06:42:03 -0400536static ssize_t set_aout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
538 struct i2c_client *client = to_i2c_client(dev);
539 struct lm87_data *data = i2c_get_clientdata(client);
540 long val = simple_strtol(buf, NULL, 10);
541
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100542 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 data->aout = AOUT_TO_REG(val);
544 lm87_write_value(client, LM87_REG_AOUT, data->aout);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100545 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 return count;
547}
548static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
549
Jean Delvarec2803b92007-09-26 23:39:01 +0200550static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
551 char *buf)
552{
553 struct lm87_data *data = lm87_update_device(dev);
554 int bitnr = to_sensor_dev_attr(attr)->index;
555 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
556}
557static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
558static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
559static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
560static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
561static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
562static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
563static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
564static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
565static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
566static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
567static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
568static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
569static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
570static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
571static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573/*
574 * Real code
575 */
576
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200577static struct attribute *lm87_attributes[] = {
578 &dev_attr_in1_input.attr,
579 &dev_attr_in1_min.attr,
580 &dev_attr_in1_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200581 &sensor_dev_attr_in1_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200582 &dev_attr_in2_input.attr,
583 &dev_attr_in2_min.attr,
584 &dev_attr_in2_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200585 &sensor_dev_attr_in2_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200586 &dev_attr_in3_input.attr,
587 &dev_attr_in3_min.attr,
588 &dev_attr_in3_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200589 &sensor_dev_attr_in3_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200590 &dev_attr_in4_input.attr,
591 &dev_attr_in4_min.attr,
592 &dev_attr_in4_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200593 &sensor_dev_attr_in4_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200594
595 &dev_attr_temp1_input.attr,
596 &dev_attr_temp1_max.attr,
597 &dev_attr_temp1_min.attr,
598 &dev_attr_temp1_crit.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200599 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200600 &dev_attr_temp2_input.attr,
601 &dev_attr_temp2_max.attr,
602 &dev_attr_temp2_min.attr,
603 &dev_attr_temp2_crit.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200604 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
605 &sensor_dev_attr_temp2_fault.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200606
607 &dev_attr_alarms.attr,
608 &dev_attr_aout_output.attr,
609
610 NULL
611};
612
613static const struct attribute_group lm87_group = {
614 .attrs = lm87_attributes,
615};
616
617static struct attribute *lm87_attributes_opt[] = {
618 &dev_attr_in6_input.attr,
619 &dev_attr_in6_min.attr,
620 &dev_attr_in6_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200621 &sensor_dev_attr_in6_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200622
623 &dev_attr_fan1_input.attr,
624 &dev_attr_fan1_min.attr,
625 &dev_attr_fan1_div.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200626 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200627
628 &dev_attr_in7_input.attr,
629 &dev_attr_in7_min.attr,
630 &dev_attr_in7_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200631 &sensor_dev_attr_in7_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200632
633 &dev_attr_fan2_input.attr,
634 &dev_attr_fan2_min.attr,
635 &dev_attr_fan2_div.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200636 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200637
638 &dev_attr_temp3_input.attr,
639 &dev_attr_temp3_max.attr,
640 &dev_attr_temp3_min.attr,
641 &dev_attr_temp3_crit.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200642 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
643 &sensor_dev_attr_temp3_fault.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200644
645 &dev_attr_in0_input.attr,
646 &dev_attr_in0_min.attr,
647 &dev_attr_in0_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200648 &sensor_dev_attr_in0_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200649 &dev_attr_in5_input.attr,
650 &dev_attr_in5_min.attr,
651 &dev_attr_in5_max.attr,
Jean Delvarec2803b92007-09-26 23:39:01 +0200652 &sensor_dev_attr_in5_alarm.dev_attr.attr,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200653
654 &dev_attr_cpu0_vid.attr,
655 &dev_attr_vrm.attr,
656
657 NULL
658};
659
660static const struct attribute_group lm87_group_opt = {
661 .attrs = lm87_attributes_opt,
662};
663
Jean Delvarea8884202008-07-16 19:30:14 +0200664/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvare310ec792009-12-14 21:17:23 +0100665static int lm87_detect(struct i2c_client *new_client,
Jean Delvarea8884202008-07-16 19:30:14 +0200666 struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
Jean Delvarea8884202008-07-16 19:30:14 +0200668 struct i2c_adapter *adapter = new_client->adapter;
Jean Delvare52df6442009-12-09 20:35:57 +0100669 const char *name;
670 u8 cid, rev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
672 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Jean Delvarea8884202008-07-16 19:30:14 +0200673 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
Jean Delvare52df6442009-12-09 20:35:57 +0100675 if (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)
676 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 /* Now, we do the remaining detection. */
Jean Delvare52df6442009-12-09 20:35:57 +0100679 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
680 rev = lm87_read_value(new_client, LM87_REG_REVISION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Jean Delvare52df6442009-12-09 20:35:57 +0100682 if (cid == 0x02 /* National Semiconductor */
683 && (rev >= 0x01 && rev <= 0x08))
684 name = "lm87";
685 else if (cid == 0x41 /* Analog Devices */
686 && (rev & 0xf0) == 0x10)
687 name = "adm1024";
688 else {
689 dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
690 new_client->addr);
691 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 }
693
Jean Delvare52df6442009-12-09 20:35:57 +0100694 strlcpy(info->type, name, I2C_NAME_SIZE);
Jean Delvarea8884202008-07-16 19:30:14 +0200695
696 return 0;
697}
698
699static int lm87_probe(struct i2c_client *new_client,
700 const struct i2c_device_id *id)
701{
702 struct lm87_data *data;
703 int err;
704
705 data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL);
706 if (!data) {
707 err = -ENOMEM;
708 goto exit;
709 }
710
711 i2c_set_clientdata(new_client, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 data->valid = 0;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100713 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 /* Initialize the LM87 chip */
716 lm87_init_client(new_client);
717
718 data->in_scale[0] = 2500;
719 data->in_scale[1] = 2700;
720 data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
721 data->in_scale[3] = 5000;
722 data->in_scale[4] = 12000;
723 data->in_scale[5] = 2700;
724 data->in_scale[6] = 1875;
725 data->in_scale[7] = 1875;
726
727 /* Register sysfs hooks */
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200728 if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
Jean Delvarea8884202008-07-16 19:30:14 +0200729 goto exit_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
731 if (data->channel & CHAN_NO_FAN(0)) {
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200732 if ((err = device_create_file(&new_client->dev,
733 &dev_attr_in6_input))
734 || (err = device_create_file(&new_client->dev,
735 &dev_attr_in6_min))
736 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200737 &dev_attr_in6_max))
738 || (err = device_create_file(&new_client->dev,
739 &sensor_dev_attr_in6_alarm.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200740 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 } else {
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200742 if ((err = device_create_file(&new_client->dev,
743 &dev_attr_fan1_input))
744 || (err = device_create_file(&new_client->dev,
745 &dev_attr_fan1_min))
746 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200747 &dev_attr_fan1_div))
748 || (err = device_create_file(&new_client->dev,
749 &sensor_dev_attr_fan1_alarm.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200750 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 }
752
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200753 if (data->channel & CHAN_NO_FAN(1)) {
754 if ((err = device_create_file(&new_client->dev,
755 &dev_attr_in7_input))
756 || (err = device_create_file(&new_client->dev,
757 &dev_attr_in7_min))
758 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200759 &dev_attr_in7_max))
760 || (err = device_create_file(&new_client->dev,
761 &sensor_dev_attr_in7_alarm.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200762 goto exit_remove;
763 } else {
764 if ((err = device_create_file(&new_client->dev,
765 &dev_attr_fan2_input))
766 || (err = device_create_file(&new_client->dev,
767 &dev_attr_fan2_min))
768 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200769 &dev_attr_fan2_div))
770 || (err = device_create_file(&new_client->dev,
771 &sensor_dev_attr_fan2_alarm.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200772 goto exit_remove;
773 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
775 if (data->channel & CHAN_TEMP3) {
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200776 if ((err = device_create_file(&new_client->dev,
777 &dev_attr_temp3_input))
778 || (err = device_create_file(&new_client->dev,
779 &dev_attr_temp3_max))
780 || (err = device_create_file(&new_client->dev,
781 &dev_attr_temp3_min))
782 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200783 &dev_attr_temp3_crit))
784 || (err = device_create_file(&new_client->dev,
785 &sensor_dev_attr_temp3_alarm.dev_attr))
786 || (err = device_create_file(&new_client->dev,
787 &sensor_dev_attr_temp3_fault.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200788 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 } else {
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200790 if ((err = device_create_file(&new_client->dev,
791 &dev_attr_in0_input))
792 || (err = device_create_file(&new_client->dev,
793 &dev_attr_in0_min))
794 || (err = device_create_file(&new_client->dev,
795 &dev_attr_in0_max))
796 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200797 &sensor_dev_attr_in0_alarm.dev_attr))
798 || (err = device_create_file(&new_client->dev,
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200799 &dev_attr_in5_input))
800 || (err = device_create_file(&new_client->dev,
801 &dev_attr_in5_min))
802 || (err = device_create_file(&new_client->dev,
Jean Delvarec2803b92007-09-26 23:39:01 +0200803 &dev_attr_in5_max))
804 || (err = device_create_file(&new_client->dev,
805 &sensor_dev_attr_in5_alarm.dev_attr)))
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200806 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 }
808
809 if (!(data->channel & CHAN_NO_VID)) {
Jean Delvare8a665a02007-05-08 17:21:59 +0200810 data->vrm = vid_which_vrm();
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200811 if ((err = device_create_file(&new_client->dev,
812 &dev_attr_cpu0_vid))
813 || (err = device_create_file(&new_client->dev,
814 &dev_attr_vrm)))
815 goto exit_remove;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 }
817
Tony Jones1beeffe2007-08-20 13:46:20 -0700818 data->hwmon_dev = hwmon_device_register(&new_client->dev);
819 if (IS_ERR(data->hwmon_dev)) {
820 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200821 goto exit_remove;
822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824 return 0;
825
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200826exit_remove:
827 sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
828 sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829exit_free:
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200830 lm87_write_value(new_client, LM87_REG_CONFIG, data->config);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 kfree(data);
832exit:
833 return err;
834}
835
836static void lm87_init_client(struct i2c_client *client)
837{
838 struct lm87_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Ben Hutchings47064d62008-10-17 17:51:12 +0200840 if (client->dev.platform_data) {
841 data->channel = *(u8 *)client->dev.platform_data;
842 lm87_write_value(client,
843 LM87_REG_CHANNEL_MODE, data->channel);
844 } else {
845 data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
846 }
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200847 data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200849 if (!(data->config & 0x01)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 int i;
851
852 /* Limits are left uninitialized after power-up */
853 for (i = 1; i < 6; i++) {
854 lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
855 lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
856 }
857 for (i = 0; i < 2; i++) {
858 lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
859 lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
860 lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
861 lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
862 }
863 if (data->channel & CHAN_TEMP3) {
864 lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
865 lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
866 } else {
867 lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
868 lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
869 }
870 }
Ben Hutchings49ae6cc2008-10-17 17:51:11 +0200871
872 /* Make sure Start is set and INT#_Clear is clear */
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200873 if ((data->config & 0x09) != 0x01)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 lm87_write_value(client, LM87_REG_CONFIG,
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200875 (data->config & 0x77) | 0x01);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876}
877
Jean Delvarea8884202008-07-16 19:30:14 +0200878static int lm87_remove(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400880 struct lm87_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Tony Jones1beeffe2007-08-20 13:46:20 -0700882 hwmon_device_unregister(data->hwmon_dev);
Mark M. Hoffman0501a382006-09-24 21:14:35 +0200883 sysfs_remove_group(&client->dev.kobj, &lm87_group);
884 sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400885
Ben Hutchingsd2cac802008-10-17 17:51:11 +0200886 lm87_write_value(client, LM87_REG_CONFIG, data->config);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400887 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 return 0;
889}
890
891static struct lm87_data *lm87_update_device(struct device *dev)
892{
893 struct i2c_client *client = to_i2c_client(dev);
894 struct lm87_data *data = i2c_get_clientdata(client);
895
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100896 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897
898 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
899 int i, j;
900
901 dev_dbg(&client->dev, "Updating data.\n");
902
903 i = (data->channel & CHAN_TEMP3) ? 1 : 0;
904 j = (data->channel & CHAN_TEMP3) ? 5 : 6;
905 for (; i < j; i++) {
906 data->in[i] = lm87_read_value(client,
907 LM87_REG_IN(i));
908 data->in_min[i] = lm87_read_value(client,
909 LM87_REG_IN_MIN(i));
910 data->in_max[i] = lm87_read_value(client,
911 LM87_REG_IN_MAX(i));
912 }
913
914 for (i = 0; i < 2; i++) {
915 if (data->channel & CHAN_NO_FAN(i)) {
916 data->in[6+i] = lm87_read_value(client,
917 LM87_REG_AIN(i));
918 data->in_max[6+i] = lm87_read_value(client,
919 LM87_REG_AIN_MAX(i));
920 data->in_min[6+i] = lm87_read_value(client,
921 LM87_REG_AIN_MIN(i));
922
923 } else {
924 data->fan[i] = lm87_read_value(client,
925 LM87_REG_FAN(i));
926 data->fan_min[i] = lm87_read_value(client,
927 LM87_REG_FAN_MIN(i));
928 }
929 }
930
931 j = (data->channel & CHAN_TEMP3) ? 3 : 2;
932 for (i = 0 ; i < j; i++) {
933 data->temp[i] = lm87_read_value(client,
934 LM87_REG_TEMP[i]);
935 data->temp_high[i] = lm87_read_value(client,
936 LM87_REG_TEMP_HIGH[i]);
937 data->temp_low[i] = lm87_read_value(client,
938 LM87_REG_TEMP_LOW[i]);
939 }
940
941 i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
942 j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
943 data->temp_crit_int = min(i, j);
944
945 i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
946 j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
947 data->temp_crit_ext = min(i, j);
948
949 i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
950 data->fan_div[0] = (i >> 4) & 0x03;
951 data->fan_div[1] = (i >> 6) & 0x03;
952 data->vid = (i & 0x0F)
953 | (lm87_read_value(client, LM87_REG_VID4) & 0x01)
954 << 4;
955
956 data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
957 | (lm87_read_value(client, LM87_REG_ALARMS2)
958 << 8);
959 data->aout = lm87_read_value(client, LM87_REG_AOUT);
960
961 data->last_updated = jiffies;
962 data->valid = 1;
963 }
964
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100965 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967 return data;
968}
969
970static int __init sensors_lm87_init(void)
971{
972 return i2c_add_driver(&lm87_driver);
973}
974
975static void __exit sensors_lm87_exit(void)
976{
977 i2c_del_driver(&lm87_driver);
978}
979
980MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
981MODULE_DESCRIPTION("LM87 driver");
982MODULE_LICENSE("GPL");
983
984module_init(sensors_lm87_init);
985module_exit(sensors_lm87_exit);