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hwmon: (lm80) Convert voltage display function macros into functions
[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / lm80.c
CommitLineData
1da177e4
LT		 1/*
2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
1160631b 3 * monitoring
1da177e4 4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
1160631b 5 * and Philip Edelbrock <phil@netroedge.com>
1da177e4
LT		 6 *
7 * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
943b0830 29#include <linux/hwmon.h>
f8181762 30#include <linux/hwmon-sysfs.h>
943b0830 31#include <linux/err.h>
9a61bf63 32#include <linux/mutex.h>
1da177e4
LT		 33
34/* Addresses to scan */
25e9c86d
MH		 35static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
36 0x2e, 0x2f, I2C_CLIENT_END };
1da177e4 37
1da177e4
LT		 38/* Many LM80 constants specified below */
39
40/* The LM80 registers */
41#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
42#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
43#define LM80_REG_IN(nr) (0x20 + (nr))
44
45#define LM80_REG_FAN1 0x28
46#define LM80_REG_FAN2 0x29
47#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
48
49#define LM80_REG_TEMP 0x27
50#define LM80_REG_TEMP_HOT_MAX 0x38
51#define LM80_REG_TEMP_HOT_HYST 0x39
52#define LM80_REG_TEMP_OS_MAX 0x3a
53#define LM80_REG_TEMP_OS_HYST 0x3b
54
55#define LM80_REG_CONFIG 0x00
56#define LM80_REG_ALARM1 0x01
57#define LM80_REG_ALARM2 0x02
58#define LM80_REG_MASK1 0x03
59#define LM80_REG_MASK2 0x04
60#define LM80_REG_FANDIV 0x05
61#define LM80_REG_RES 0x06
62
9908ad4c
JD		 63#define LM96080_REG_CONV_RATE 0x07
64#define LM96080_REG_MAN_ID 0x3e
65#define LM96080_REG_DEV_ID 0x3f
66
1da177e4 67
1160631b
GR		 68/*
69 * Conversions. Rounding and limit checking is only done on the TO_REG
70 * variants. Note that you should be a bit careful with which arguments
71 * these macros are called: arguments may be evaluated more than once.
72 * Fixing this is just not worth it.
73 */
1da177e4 74
2a844c14 75#define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255))
66b3b1f7 76#define IN_FROM_REG(val) ((val) * 10)
1da177e4
LT		 77
78static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
79{
80 if (rpm == 0)
81 return 255;
2a844c14
GR		 82 rpm = clamp_val(rpm, 1, 1000000);
83 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
1da177e4
LT		 84}
85
66b3b1f7
FM		 86#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
87 (val) == 255 ? 0 : 1350000/((div) * (val)))
1da177e4 88
688a3174
GR		 89#define TEMP_FROM_REG(reg) ((reg) * 125 / 32)
90#define TEMP_TO_REG(temp) (DIV_ROUND_CLOSEST(clamp_val((temp), \
91 -128000, 127000), 1000) << 8)
1da177e4
LT		 92
93#define DIV_FROM_REG(val) (1 << (val))
94
9711bcdd
GR		 95enum temp_index {
96 t_input = 0,
97 t_hot_max,
98 t_hot_hyst,
99 t_os_max,
100 t_os_hyst,
101 t_num_temp
102};
103
104static const u8 temp_regs[t_num_temp] = {
105 [t_input] = LM80_REG_TEMP,
106 [t_hot_max] = LM80_REG_TEMP_HOT_MAX,
107 [t_hot_hyst] = LM80_REG_TEMP_HOT_HYST,
108 [t_os_max] = LM80_REG_TEMP_OS_MAX,
109 [t_os_hyst] = LM80_REG_TEMP_OS_HYST,
110};
111
1adf3a3e
GR		 112enum in_index {
113 i_input = 0,
114 i_max,
115 i_min,
116 i_num_in
117};
118
1da177e4
LT		 119/*
120 * Client data (each client gets its own)
121 */
122
123struct lm80_data {
118c9a61 124 struct i2c_client *client;
9a61bf63 125 struct mutex update_lock;
96585f1a 126 char error; /* !=0 if error occurred during last update */
1da177e4
LT		 127 char valid; /* !=0 if following fields are valid */
128 unsigned long last_updated; /* In jiffies */
129
1adf3a3e 130 u8 in[i_num_in][7]; /* Register value, 1st index is enum in_index */
1da177e4
LT		 131 u8 fan[2]; /* Register value */
132 u8 fan_min[2]; /* Register value */
133 u8 fan_div[2]; /* Register encoding, shifted right */
9711bcdd 134 s16 temp[t_num_temp]; /* Register values, normalized to 16 bit */
1da177e4
LT		 135 u16 alarms; /* Register encoding, combined */
136};
137
6cc37ee5 138/*
1da177e4
LT		 139 * Functions declaration
140 */
141
8c8bacc8
JD		 142static int lm80_probe(struct i2c_client *client,
143 const struct i2c_device_id *id);
310ec792 144static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
1da177e4 145static void lm80_init_client(struct i2c_client *client);
1da177e4
LT		 146static struct lm80_data *lm80_update_device(struct device *dev);
147static int lm80_read_value(struct i2c_client *client, u8 reg);
148static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
149
150/*
151 * Driver data (common to all clients)
152 */
153
8c8bacc8 154static const struct i2c_device_id lm80_id[] = {
1f86df49 155 { "lm80", 0 },
9908ad4c 156 { "lm96080", 1 },
8c8bacc8
JD		 157 { }
158};
159MODULE_DEVICE_TABLE(i2c, lm80_id);
160
1da177e4 161static struct i2c_driver lm80_driver = {
8c8bacc8 162 .class = I2C_CLASS_HWMON,
cdaf7934 163 .driver = {
cdaf7934
LR		 164 .name = "lm80",
165 },
8c8bacc8 166 .probe = lm80_probe,
8c8bacc8
JD		 167 .id_table = lm80_id,
168 .detect = lm80_detect,
c3813d6a 169 .address_list = normal_i2c,
1da177e4
LT		 170};
171
172/*
173 * Sysfs stuff
174 */
175
1adf3a3e
GR		 176static ssize_t show_in(struct device *dev, struct device_attribute *attr,
177 char *buf)
178{
179 struct lm80_data *data = lm80_update_device(dev);
180 int index = to_sensor_dev_attr_2(attr)->index;
181 int nr = to_sensor_dev_attr_2(attr)->nr;
182
183 if (IS_ERR(data))
184 return PTR_ERR(data);
185 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index]));
1da177e4 186}
1da177e4 187
1adf3a3e
GR		 188static ssize_t set_in(struct device *dev, struct device_attribute *attr,
189 const char *buf, size_t count)
190{
191 struct lm80_data *data = dev_get_drvdata(dev);
192 struct i2c_client *client = data->client;
193 int index = to_sensor_dev_attr_2(attr)->index;
194 int nr = to_sensor_dev_attr_2(attr)->nr;
195 long val;
196 u8 reg;
197 int err = kstrtol(buf, 10, &val);
198 if (err < 0)
199 return err;
200
201 reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index);
202
203 mutex_lock(&data->update_lock);
204 data->in[nr][index] = IN_TO_REG(val);
205 lm80_write_value(client, reg, data->in[nr][index]);
206 mutex_unlock(&data->update_lock);
207 return count;
1da177e4 208}
f8181762
JD		 209
210#define show_fan(suffix, value) \
66b3b1f7
FM		 211static ssize_t show_fan_##suffix(struct device *dev, \
212 struct device_attribute *attr, char *buf) \
1da177e4 213{ \
f8181762 214 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4 215 struct lm80_data *data = lm80_update_device(dev); \
2faaa931
FM		 216 if (IS_ERR(data)) \
217 return PTR_ERR(data); \
f8181762
JD		 218 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
219 DIV_FROM_REG(data->fan_div[nr]))); \
1da177e4 220}
f8181762
JD		 221show_fan(min, fan_min)
222show_fan(input, fan)
1da177e4 223
f8181762
JD		 224static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
225 char *buf)
226{
227 int nr = to_sensor_dev_attr(attr)->index;
228 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 229 if (IS_ERR(data))
230 return PTR_ERR(data);
f8181762 231 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
1da177e4 232}
1da177e4 233
f8181762
JD		 234static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
235 const char *buf, size_t count)
236{
237 int nr = to_sensor_dev_attr(attr)->index;
118c9a61
GR		 238 struct lm80_data *data = dev_get_drvdata(dev);
239 struct i2c_client *client = data->client;
6a9e7c4c
FM		 240 unsigned long val;
241 int err = kstrtoul(buf, 10, &val);
242 if (err < 0)
243 return err;
f8181762
JD		 244
245 mutex_lock(&data->update_lock);
246 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
247 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
1da177e4 250}
1da177e4 251
1160631b
GR		 252/*
253 * Note: we save and restore the fan minimum here, because its value is
254 * determined in part by the fan divisor. This follows the principle of
255 * least surprise; the user doesn't expect the fan minimum to change just
256 * because the divisor changed.
257 */
f8181762
JD		 258static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t count)
1da177e4 260{
f8181762 261 int nr = to_sensor_dev_attr(attr)->index;
118c9a61
GR		 262 struct lm80_data *data = dev_get_drvdata(dev);
263 struct i2c_client *client = data->client;
6a9e7c4c 264 unsigned long min, val;
1da177e4 265 u8 reg;
6a9e7c4c
FM		 266 int err = kstrtoul(buf, 10, &val);
267 if (err < 0)
268 return err;
1da177e4
LT		 269
270 /* Save fan_min */
9a61bf63 271 mutex_lock(&data->update_lock);
1da177e4
LT		 272 min = FAN_FROM_REG(data->fan_min[nr],
273 DIV_FROM_REG(data->fan_div[nr]));
274
275 switch (val) {
66b3b1f7
FM		 276 case 1:
277 data->fan_div[nr] = 0;
278 break;
279 case 2:
280 data->fan_div[nr] = 1;
281 break;
282 case 4:
283 data->fan_div[nr] = 2;
284 break;
285 case 8:
286 data->fan_div[nr] = 3;
287 break;
1da177e4 288 default:
118c9a61 289 dev_err(dev,
b55f3757
GR		 290 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
291 val);
9a61bf63 292 mutex_unlock(&data->update_lock);
1da177e4
LT		 293 return -EINVAL;
294 }
295
296 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
297 | (data->fan_div[nr] << (2 * (nr + 1)));
298 lm80_write_value(client, LM80_REG_FANDIV, reg);
299
300 /* Restore fan_min */
301 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
302 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
9a61bf63 303 mutex_unlock(&data->update_lock);
1da177e4
LT		 304
305 return count;
306}
307
9711bcdd
GR		 308static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
309 char *buf)
1da177e4 310{
9711bcdd 311 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4 312 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 313 if (IS_ERR(data))
314 return PTR_ERR(data);
9711bcdd 315 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
1da177e4
LT		 316}
317
9711bcdd
GR		 318static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
319 const char *buf, size_t count)
320{
321 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
322 struct lm80_data *data = dev_get_drvdata(dev);
323 struct i2c_client *client = data->client;
324 int nr = attr->index;
325 long val;
326 int err = kstrtol(buf, 10, &val);
327 if (err < 0)
328 return err;
1da177e4 329
9711bcdd
GR		 330 mutex_lock(&data->update_lock);
331 data->temp[nr] = TEMP_TO_REG(val);
332 lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8);
333 mutex_unlock(&data->update_lock);
334 return count;
1da177e4 335}
1da177e4 336
6cc37ee5
JD		 337static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
338 char *buf)
1da177e4
LT		 339{
340 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 341 if (IS_ERR(data))
342 return PTR_ERR(data);
1da177e4
LT		 343 return sprintf(buf, "%u\n", data->alarms);
344}
345
e84542f5
JD		 346static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
347 char *buf)
348{
349 int bitnr = to_sensor_dev_attr(attr)->index;
350 struct lm80_data *data = lm80_update_device(dev);
2faaa931
FM		 351 if (IS_ERR(data))
352 return PTR_ERR(data);
e84542f5
JD		 353 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
354}
355
1adf3a3e
GR		 356static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
357 show_in, set_in, i_min, 0);
358static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
359 show_in, set_in, i_min, 1);
360static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
361 show_in, set_in, i_min, 2);
362static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
363 show_in, set_in, i_min, 3);
364static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
365 show_in, set_in, i_min, 4);
366static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
367 show_in, set_in, i_min, 5);
368static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
369 show_in, set_in, i_min, 6);
370static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
371 show_in, set_in, i_max, 0);
372static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
373 show_in, set_in, i_max, 1);
374static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
375 show_in, set_in, i_max, 2);
376static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
377 show_in, set_in, i_max, 3);
378static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
379 show_in, set_in, i_max, 4);
380static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
381 show_in, set_in, i_max, 5);
382static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
383 show_in, set_in, i_max, 6);
384static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, i_input, 0);
385static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, i_input, 1);
386static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, i_input, 2);
387static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, i_input, 3);
388static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, i_input, 4);
389static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, i_input, 5);
390static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, i_input, 6);
f8181762
JD		 391static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
392 show_fan_min, set_fan_min, 0);
393static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
394 show_fan_min, set_fan_min, 1);
395static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
396static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
397static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
398 show_fan_div, set_fan_div, 0);
399static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
400 show_fan_div, set_fan_div, 1);
9711bcdd
GR		 401static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input);
402static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp,
403 set_temp, t_hot_max);
404static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp,
405 set_temp, t_hot_hyst);
406static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
407 set_temp, t_os_max);
408static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp,
409 set_temp, t_os_hyst);
1da177e4 410static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
e84542f5
JD		 411static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
412static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
413static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
414static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
415static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
416static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
417static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
418static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
419static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
420static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
421static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
1da177e4
LT		 422
423/*
424 * Real code
425 */
426
118c9a61 427static struct attribute *lm80_attrs[] = {
f8181762
JD		 428 &sensor_dev_attr_in0_min.dev_attr.attr,
429 &sensor_dev_attr_in1_min.dev_attr.attr,
430 &sensor_dev_attr_in2_min.dev_attr.attr,
431 &sensor_dev_attr_in3_min.dev_attr.attr,
432 &sensor_dev_attr_in4_min.dev_attr.attr,
433 &sensor_dev_attr_in5_min.dev_attr.attr,
434 &sensor_dev_attr_in6_min.dev_attr.attr,
435 &sensor_dev_attr_in0_max.dev_attr.attr,
436 &sensor_dev_attr_in1_max.dev_attr.attr,
437 &sensor_dev_attr_in2_max.dev_attr.attr,
438 &sensor_dev_attr_in3_max.dev_attr.attr,
439 &sensor_dev_attr_in4_max.dev_attr.attr,
440 &sensor_dev_attr_in5_max.dev_attr.attr,
441 &sensor_dev_attr_in6_max.dev_attr.attr,
442 &sensor_dev_attr_in0_input.dev_attr.attr,
443 &sensor_dev_attr_in1_input.dev_attr.attr,
444 &sensor_dev_attr_in2_input.dev_attr.attr,
445 &sensor_dev_attr_in3_input.dev_attr.attr,
446 &sensor_dev_attr_in4_input.dev_attr.attr,
447 &sensor_dev_attr_in5_input.dev_attr.attr,
448 &sensor_dev_attr_in6_input.dev_attr.attr,
449 &sensor_dev_attr_fan1_min.dev_attr.attr,
450 &sensor_dev_attr_fan2_min.dev_attr.attr,
451 &sensor_dev_attr_fan1_input.dev_attr.attr,
452 &sensor_dev_attr_fan2_input.dev_attr.attr,
453 &sensor_dev_attr_fan1_div.dev_attr.attr,
454 &sensor_dev_attr_fan2_div.dev_attr.attr,
9711bcdd
GR		 455 &sensor_dev_attr_temp1_input.dev_attr.attr,
456 &sensor_dev_attr_temp1_max.dev_attr.attr,
457 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
458 &sensor_dev_attr_temp1_crit.dev_attr.attr,
459 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
0501a381 460 &dev_attr_alarms.attr,
e84542f5
JD		 461 &sensor_dev_attr_in0_alarm.dev_attr.attr,
462 &sensor_dev_attr_in1_alarm.dev_attr.attr,
463 &sensor_dev_attr_in2_alarm.dev_attr.attr,
464 &sensor_dev_attr_in3_alarm.dev_attr.attr,
465 &sensor_dev_attr_in4_alarm.dev_attr.attr,
466 &sensor_dev_attr_in5_alarm.dev_attr.attr,
467 &sensor_dev_attr_in6_alarm.dev_attr.attr,
468 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
469 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
470 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
471 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
0501a381
MH		 472 NULL
473};
118c9a61 474ATTRIBUTE_GROUPS(lm80);
0501a381 475
8c8bacc8 476/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 477static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
1da177e4 478{
8c8bacc8 479 struct i2c_adapter *adapter = client->adapter;
9908ad4c
JD		 480 int i, cur, man_id, dev_id;
481 const char *name = NULL;
1da177e4
LT		 482
483 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
8c8bacc8 484 return -ENODEV;
1da177e4 485
9908ad4c
JD		 486 /* First check for unused bits, common to both chip types */
487 if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
488 || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
8c8bacc8 489 return -ENODEV;
9908ad4c
JD		 490
491 /*
492 * The LM96080 has manufacturer and stepping/die rev registers so we
493 * can just check that. The LM80 does not have such registers so we
494 * have to use a more expensive trick.
495 */
496 man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
497 dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
498 if (man_id == 0x01 && dev_id == 0x08) {
499 /* Check more unused bits for confirmation */
500 if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
66b3b1f7 501 return -ENODEV;
9908ad4c
JD		 502
503 name = "lm96080";
504 } else {
505 /* Check 6-bit addressing */
506 for (i = 0x2a; i <= 0x3d; i++) {
507 cur = i2c_smbus_read_byte_data(client, i);
508 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
509 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
510 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
511 return -ENODEV;
512 }
513
514 name = "lm80";
1da177e4
LT		 515 }
516
9908ad4c 517 strlcpy(info->type, name, I2C_NAME_SIZE);
1da177e4 518
8c8bacc8
JD		 519 return 0;
520}
1da177e4 521
8c8bacc8
JD		 522static int lm80_probe(struct i2c_client *client,
523 const struct i2c_device_id *id)
524{
118c9a61
GR		 525 struct device *dev = &client->dev;
526 struct device *hwmon_dev;
8c8bacc8 527 struct lm80_data *data;
8c8bacc8 528
118c9a61 529 data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
c38b2820
GR		 530 if (!data)
531 return -ENOMEM;
8c8bacc8 532
118c9a61 533 data->client = client;
8c8bacc8 534 mutex_init(&data->update_lock);
1da177e4
LT		 535
536 /* Initialize the LM80 chip */
6cc37ee5 537 lm80_init_client(client);
1da177e4
LT		 538
539 /* A few vars need to be filled upon startup */
6cc37ee5
JD		 540 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
541 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
1da177e4 542
118c9a61
GR		 543 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
544 data, lm80_groups);
943b0830 545
118c9a61 546 return PTR_ERR_OR_ZERO(hwmon_dev);
1da177e4
LT		 547}
548
549static int lm80_read_value(struct i2c_client *client, u8 reg)
550{
551 return i2c_smbus_read_byte_data(client, reg);
552}
553
554static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
555{
556 return i2c_smbus_write_byte_data(client, reg, value);
557}
558
559/* Called when we have found a new LM80. */
560static void lm80_init_client(struct i2c_client *client)
561{
1160631b
GR		 562 /*
563 * Reset all except Watchdog values and last conversion values
564 * This sets fan-divs to 2, among others. This makes most other
565 * initializations unnecessary
566 */
1da177e4
LT		 567 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
568 /* Set 11-bit temperature resolution */
569 lm80_write_value(client, LM80_REG_RES, 0x08);
570
571 /* Start monitoring */
572 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
573}
574
575static struct lm80_data *lm80_update_device(struct device *dev)
576{
118c9a61
GR		 577 struct lm80_data *data = dev_get_drvdata(dev);
578 struct i2c_client *client = data->client;
1da177e4 579 int i;
2faaa931
FM		 580 int rv;
581 int prev_rv;
582 struct lm80_data *ret = data;
1da177e4 583
9a61bf63 584 mutex_lock(&data->update_lock);
1da177e4 585
96585f1a
FM		 586 if (data->error)
587 lm80_init_client(client);
588
1da177e4 589 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
118c9a61 590 dev_dbg(dev, "Starting lm80 update\n");
1da177e4 591 for (i = 0; i <= 6; i++) {
2faaa931
FM		 592 rv = lm80_read_value(client, LM80_REG_IN(i));
593 if (rv < 0)
594 goto abort;
1adf3a3e 595 data->in[i_input][i] = rv;
2faaa931
FM		 596
597 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
598 if (rv < 0)
599 goto abort;
1adf3a3e 600 data->in[i_min][i] = rv;
2faaa931
FM		 601
602 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
603 if (rv < 0)
604 goto abort;
1adf3a3e 605 data->in[i_max][i] = rv;
1da177e4 606 }
2faaa931
FM		 607
608 rv = lm80_read_value(client, LM80_REG_FAN1);
609 if (rv < 0)
610 goto abort;
611 data->fan[0] = rv;
612
613 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
614 if (rv < 0)
615 goto abort;
616 data->fan_min[0] = rv;
617
618 rv = lm80_read_value(client, LM80_REG_FAN2);
619 if (rv < 0)
620 goto abort;
621 data->fan[1] = rv;
622
623 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
624 if (rv < 0)
625 goto abort;
626 data->fan_min[1] = rv;
627
628 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
629 if (rv < 0)
630 goto abort;
631 rv = lm80_read_value(client, LM80_REG_RES);
632 if (rv < 0)
633 goto abort;
9711bcdd 634 data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0);
2faaa931 635
9711bcdd
GR		 636 for (i = t_input + 1; i < t_num_temp; i++) {
637 rv = lm80_read_value(client, temp_regs[i]);
638 if (rv < 0)
639 goto abort;
640 data->temp[i] = rv << 8;
641 }
2faaa931
FM		 642
643 rv = lm80_read_value(client, LM80_REG_FANDIV);
644 if (rv < 0)
645 goto abort;
646 data->fan_div[0] = (rv >> 2) & 0x03;
647 data->fan_div[1] = (rv >> 4) & 0x03;
648
649 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
650 if (rv < 0)
651 goto abort;
652 rv = lm80_read_value(client, LM80_REG_ALARM2);
653 if (rv < 0)
654 goto abort;
655 data->alarms = prev_rv + (rv << 8);
656
1da177e4
LT		 657 data->last_updated = jiffies;
658 data->valid = 1;
96585f1a 659 data->error = 0;
1da177e4 660 }
2faaa931
FM		 661 goto done;
662
663abort:
664 ret = ERR_PTR(rv);
665 data->valid = 0;
96585f1a 666 data->error = 1;
1da177e4 667
2faaa931 668done:
9a61bf63 669 mutex_unlock(&data->update_lock);
1da177e4 670
2faaa931 671 return ret;
1da177e4
LT		 672}
673
f0967eea 674module_i2c_driver(lm80_driver);
1da177e4
LT		 675
676MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
677 "Philip Edelbrock <phil@netroedge.com>");
678MODULE_DESCRIPTION("LM80 driver");
679MODULE_LICENSE("GPL");
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