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18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/jiffies.h>
22#include <linux/i2c.h>
23#include <linux/hwmon.h>
24#include <linux/hwmon-sysfs.h>
25#include <linux/err.h>
26#include <linux/mutex.h>
27#include <linux/of.h>
28
29#include <linux/platform_data/max6697.h>
30
31enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
32 max6697, max6698, max6699 };
33
34
35
36static const u8 MAX6697_REG_TEMP[] = {
37 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
38static const u8 MAX6697_REG_TEMP_EXT[] = {
39 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
40static const u8 MAX6697_REG_MAX[] = {
41 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
42static const u8 MAX6697_REG_CRIT[] = {
43 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
44
45
46
47
48
49#define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \
50 (((reg) & 0x01) << 6) | ((reg) & 0x80))
51
52#define MAX6697_REG_STAT(n) (0x44 + (n))
53
54#define MAX6697_REG_CONFIG 0x41
55#define MAX6581_CONF_EXTENDED (1 << 1)
56#define MAX6693_CONF_BETA (1 << 2)
57#define MAX6697_CONF_RESISTANCE (1 << 3)
58#define MAX6697_CONF_TIMEOUT (1 << 5)
59#define MAX6697_REG_ALERT_MASK 0x42
60#define MAX6697_REG_OVERT_MASK 0x43
61
62#define MAX6581_REG_RESISTANCE 0x4a
63#define MAX6581_REG_IDEALITY 0x4b
64#define MAX6581_REG_IDEALITY_SELECT 0x4c
65#define MAX6581_REG_OFFSET 0x4d
66#define MAX6581_REG_OFFSET_SELECT 0x4e
67
68#define MAX6697_CONV_TIME 156
69
70struct max6697_chip_data {
71 int channels;
72 u32 have_ext;
73 u32 have_crit;
74 u32 have_fault;
75 u8 valid_conf;
76 const u8 *alarm_map;
77};
78
79struct max6697_data {
80 struct device *hwmon_dev;
81
82 enum chips type;
83 const struct max6697_chip_data *chip;
84
85 int update_interval;
86 int temp_offset;
87
88 struct mutex update_lock;
89 unsigned long last_updated;
90 bool valid;
91
92
93 u8 temp[8][4];
94#define MAX6697_TEMP_INPUT 0
95#define MAX6697_TEMP_EXT 1
96#define MAX6697_TEMP_MAX 2
97#define MAX6697_TEMP_CRIT 3
98 u32 alarms;
99};
100
101
102static const u8 max6581_alarm_map[] = {
103 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15,
104 16, 17, 18, 19, 20, 21, 22, 23 };
105
106static const struct max6697_chip_data max6697_chip_data[] = {
107 [max6581] = {
108 .channels = 8,
109 .have_crit = 0xff,
110 .have_ext = 0x7f,
111 .have_fault = 0xfe,
112 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
113 .alarm_map = max6581_alarm_map,
114 },
115 [max6602] = {
116 .channels = 5,
117 .have_crit = 0x12,
118 .have_ext = 0x02,
119 .have_fault = 0x1e,
120 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
121 },
122 [max6622] = {
123 .channels = 5,
124 .have_crit = 0x12,
125 .have_ext = 0x02,
126 .have_fault = 0x1e,
127 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
128 },
129 [max6636] = {
130 .channels = 7,
131 .have_crit = 0x72,
132 .have_ext = 0x02,
133 .have_fault = 0x7e,
134 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
135 },
136 [max6689] = {
137 .channels = 7,
138 .have_crit = 0x72,
139 .have_ext = 0x02,
140 .have_fault = 0x7e,
141 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
142 },
143 [max6693] = {
144 .channels = 7,
145 .have_crit = 0x72,
146 .have_ext = 0x02,
147 .have_fault = 0x7e,
148 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
149 MAX6697_CONF_TIMEOUT,
150 },
151 [max6694] = {
152 .channels = 5,
153 .have_crit = 0x12,
154 .have_ext = 0x02,
155 .have_fault = 0x1e,
156 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
157 MAX6697_CONF_TIMEOUT,
158 },
159 [max6697] = {
160 .channels = 7,
161 .have_crit = 0x72,
162 .have_ext = 0x02,
163 .have_fault = 0x7e,
164 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
165 },
166 [max6698] = {
167 .channels = 7,
168 .have_crit = 0x72,
169 .have_ext = 0x02,
170 .have_fault = 0x0e,
171 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
172 },
173 [max6699] = {
174 .channels = 5,
175 .have_crit = 0x12,
176 .have_ext = 0x02,
177 .have_fault = 0x1e,
178 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
179 },
180};
181
182static struct max6697_data *max6697_update_device(struct device *dev)
183{
184 struct i2c_client *client = to_i2c_client(dev);
185 struct max6697_data *data = i2c_get_clientdata(client);
186 struct max6697_data *ret = data;
187 int val;
188 int i;
189 u32 alarms;
190
191 mutex_lock(&data->update_lock);
192
193 if (data->valid &&
194 !time_after(jiffies, data->last_updated
195 + msecs_to_jiffies(data->update_interval)))
196 goto abort;
197
198 for (i = 0; i < data->chip->channels; i++) {
199 if (data->chip->have_ext & (1 << i)) {
200 val = i2c_smbus_read_byte_data(client,
201 MAX6697_REG_TEMP_EXT[i]);
202 if (unlikely(val < 0)) {
203 ret = ERR_PTR(val);
204 goto abort;
205 }
206 data->temp[i][MAX6697_TEMP_EXT] = val;
207 }
208
209 val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]);
210 if (unlikely(val < 0)) {
211 ret = ERR_PTR(val);
212 goto abort;
213 }
214 data->temp[i][MAX6697_TEMP_INPUT] = val;
215
216 val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]);
217 if (unlikely(val < 0)) {
218 ret = ERR_PTR(val);
219 goto abort;
220 }
221 data->temp[i][MAX6697_TEMP_MAX] = val;
222
223 if (data->chip->have_crit & (1 << i)) {
224 val = i2c_smbus_read_byte_data(client,
225 MAX6697_REG_CRIT[i]);
226 if (unlikely(val < 0)) {
227 ret = ERR_PTR(val);
228 goto abort;
229 }
230 data->temp[i][MAX6697_TEMP_CRIT] = val;
231 }
232 }
233
234 alarms = 0;
235 for (i = 0; i < 3; i++) {
236 val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i));
237 if (unlikely(val < 0)) {
238 ret = ERR_PTR(val);
239 goto abort;
240 }
241 alarms = (alarms << 8) | val;
242 }
243 data->alarms = alarms;
244 data->last_updated = jiffies;
245 data->valid = true;
246abort:
247 mutex_unlock(&data->update_lock);
248
249 return ret;
250}
251
252static ssize_t show_temp_input(struct device *dev,
253 struct device_attribute *devattr, char *buf)
254{
255 int index = to_sensor_dev_attr(devattr)->index;
256 struct max6697_data *data = max6697_update_device(dev);
257 int temp;
258
259 if (IS_ERR(data))
260 return PTR_ERR(data);
261
262 temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3;
263 temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5;
264
265 return sprintf(buf, "%d\n", temp * 125);
266}
267
268static ssize_t show_temp(struct device *dev,
269 struct device_attribute *devattr, char *buf)
270{
271 int nr = to_sensor_dev_attr_2(devattr)->nr;
272 int index = to_sensor_dev_attr_2(devattr)->index;
273 struct max6697_data *data = max6697_update_device(dev);
274 int temp;
275
276 if (IS_ERR(data))
277 return PTR_ERR(data);
278
279 temp = data->temp[nr][index];
280 temp -= data->temp_offset;
281
282 return sprintf(buf, "%d\n", temp * 1000);
283}
284
285static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
286 char *buf)
287{
288 int index = to_sensor_dev_attr(attr)->index;
289 struct max6697_data *data = max6697_update_device(dev);
290
291 if (IS_ERR(data))
292 return PTR_ERR(data);
293
294 if (data->chip->alarm_map)
295 index = data->chip->alarm_map[index];
296
297 return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1);
298}
299
300static ssize_t set_temp(struct device *dev,
301 struct device_attribute *devattr,
302 const char *buf, size_t count)
303{
304 int nr = to_sensor_dev_attr_2(devattr)->nr;
305 int index = to_sensor_dev_attr_2(devattr)->index;
306 struct i2c_client *client = to_i2c_client(dev);
307 struct max6697_data *data = i2c_get_clientdata(client);
308 long temp;
309 int ret;
310
311 ret = kstrtol(buf, 10, &temp);
312 if (ret < 0)
313 return ret;
314
315 mutex_lock(&data->update_lock);
316 temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset;
317 temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127);
318 data->temp[nr][index] = temp;
319 ret = i2c_smbus_write_byte_data(client,
320 index == 2 ? MAX6697_REG_MAX[nr]
321 : MAX6697_REG_CRIT[nr],
322 temp);
323 mutex_unlock(&data->update_lock);
324
325 return ret < 0 ? ret : count;
326}
327
328static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
329static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
330 0, MAX6697_TEMP_MAX);
331static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
332 0, MAX6697_TEMP_CRIT);
333
334static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
335static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
336 1, MAX6697_TEMP_MAX);
337static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
338 1, MAX6697_TEMP_CRIT);
339
340static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
341static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
342 2, MAX6697_TEMP_MAX);
343static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
344 2, MAX6697_TEMP_CRIT);
345
346static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
347static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
348 3, MAX6697_TEMP_MAX);
349static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
350 3, MAX6697_TEMP_CRIT);
351
352static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
353static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
354 4, MAX6697_TEMP_MAX);
355static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
356 4, MAX6697_TEMP_CRIT);
357
358static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
359static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
360 5, MAX6697_TEMP_MAX);
361static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
362 5, MAX6697_TEMP_CRIT);
363
364static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_input, NULL, 6);
365static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
366 6, MAX6697_TEMP_MAX);
367static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
368 6, MAX6697_TEMP_CRIT);
369
370static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_input, NULL, 7);
371static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
372 7, MAX6697_TEMP_MAX);
373static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
374 7, MAX6697_TEMP_CRIT);
375
376static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22);
377static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16);
378static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17);
379static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18);
380static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19);
381static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20);
382static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21);
383static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23);
384
385static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
386static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8);
387static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
388static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10);
389static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11);
390static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
391static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
392static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15);
393
394static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1);
395static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
396static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3);
397static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4);
398static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5);
399static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6);
400static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7);
401
402static DEVICE_ATTR(dummy, 0, NULL, NULL);
403
404static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr,
405 int index)
406{
407 struct device *dev = container_of(kobj, struct device, kobj);
408 struct i2c_client *client = to_i2c_client(dev);
409 struct max6697_data *data = i2c_get_clientdata(client);
410 const struct max6697_chip_data *chip = data->chip;
411 int channel = index / 6;
412 int nr = index % 6;
413
414 if (channel >= chip->channels)
415 return 0;
416
417 if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel)))
418 return 0;
419 if (nr == 5 && !(chip->have_fault & (1 << channel)))
420 return 0;
421
422 return attr->mode;
423}
424
425
426
427
428
429
430static struct attribute *max6697_attributes[] = {
431 &sensor_dev_attr_temp1_input.dev_attr.attr,
432 &sensor_dev_attr_temp1_max.dev_attr.attr,
433 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
434 &sensor_dev_attr_temp1_crit.dev_attr.attr,
435 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
436 &dev_attr_dummy.attr,
437
438 &sensor_dev_attr_temp2_input.dev_attr.attr,
439 &sensor_dev_attr_temp2_max.dev_attr.attr,
440 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
441 &sensor_dev_attr_temp2_crit.dev_attr.attr,
442 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
443 &sensor_dev_attr_temp2_fault.dev_attr.attr,
444
445 &sensor_dev_attr_temp3_input.dev_attr.attr,
446 &sensor_dev_attr_temp3_max.dev_attr.attr,
447 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
448 &sensor_dev_attr_temp3_crit.dev_attr.attr,
449 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
450 &sensor_dev_attr_temp3_fault.dev_attr.attr,
451
452 &sensor_dev_attr_temp4_input.dev_attr.attr,
453 &sensor_dev_attr_temp4_max.dev_attr.attr,
454 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
455 &sensor_dev_attr_temp4_crit.dev_attr.attr,
456 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
457 &sensor_dev_attr_temp4_fault.dev_attr.attr,
458
459 &sensor_dev_attr_temp5_input.dev_attr.attr,
460 &sensor_dev_attr_temp5_max.dev_attr.attr,
461 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
462 &sensor_dev_attr_temp5_crit.dev_attr.attr,
463 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
464 &sensor_dev_attr_temp5_fault.dev_attr.attr,
465
466 &sensor_dev_attr_temp6_input.dev_attr.attr,
467 &sensor_dev_attr_temp6_max.dev_attr.attr,
468 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
469 &sensor_dev_attr_temp6_crit.dev_attr.attr,
470 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
471 &sensor_dev_attr_temp6_fault.dev_attr.attr,
472
473 &sensor_dev_attr_temp7_input.dev_attr.attr,
474 &sensor_dev_attr_temp7_max.dev_attr.attr,
475 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
476 &sensor_dev_attr_temp7_crit.dev_attr.attr,
477 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
478 &sensor_dev_attr_temp7_fault.dev_attr.attr,
479
480 &sensor_dev_attr_temp8_input.dev_attr.attr,
481 &sensor_dev_attr_temp8_max.dev_attr.attr,
482 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
483 &sensor_dev_attr_temp8_crit.dev_attr.attr,
484 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
485 &sensor_dev_attr_temp8_fault.dev_attr.attr,
486 NULL
487};
488
489static const struct attribute_group max6697_group = {
490 .attrs = max6697_attributes, .is_visible = max6697_is_visible,
491};
492
493static void max6697_get_config_of(struct device_node *node,
494 struct max6697_platform_data *pdata)
495{
496 int len;
497 const __be32 *prop;
498
499 prop = of_get_property(node, "smbus-timeout-disable", &len);
500 if (prop)
501 pdata->smbus_timeout_disable = true;
502 prop = of_get_property(node, "extended-range-enable", &len);
503 if (prop)
504 pdata->extended_range_enable = true;
505 prop = of_get_property(node, "beta-compensation-enable", &len);
506 if (prop)
507 pdata->beta_compensation = true;
508 prop = of_get_property(node, "alert-mask", &len);
509 if (prop && len == sizeof(u32))
510 pdata->alert_mask = be32_to_cpu(prop[0]);
511 prop = of_get_property(node, "over-temperature-mask", &len);
512 if (prop && len == sizeof(u32))
513 pdata->over_temperature_mask = be32_to_cpu(prop[0]);
514 prop = of_get_property(node, "resistance-cancellation", &len);
515 if (prop) {
516 if (len == sizeof(u32))
517 pdata->resistance_cancellation = be32_to_cpu(prop[0]);
518 else
519 pdata->resistance_cancellation = 0xfe;
520 }
521 prop = of_get_property(node, "transistor-ideality", &len);
522 if (prop && len == 2 * sizeof(u32)) {
523 pdata->ideality_mask = be32_to_cpu(prop[0]);
524 pdata->ideality_value = be32_to_cpu(prop[1]);
525 }
526}
527
528static int max6697_init_chip(struct i2c_client *client)
529{
530 struct max6697_data *data = i2c_get_clientdata(client);
531 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
532 struct max6697_platform_data p;
533 const struct max6697_chip_data *chip = data->chip;
534 int factor = chip->channels;
535 int ret, reg;
536
537
538
539
540
541
542 if (!pdata && !client->dev.of_node) {
543 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG);
544 if (reg < 0)
545 return reg;
546 if (data->type == max6581) {
547 if (reg & MAX6581_CONF_EXTENDED)
548 data->temp_offset = 64;
549 reg = i2c_smbus_read_byte_data(client,
550 MAX6581_REG_RESISTANCE);
551 if (reg < 0)
552 return reg;
553 factor += hweight8(reg);
554 } else {
555 if (reg & MAX6697_CONF_RESISTANCE)
556 factor++;
557 }
558 goto done;
559 }
560
561 if (client->dev.of_node) {
562 memset(&p, 0, sizeof(p));
563 max6697_get_config_of(client->dev.of_node, &p);
564 pdata = &p;
565 }
566
567 reg = 0;
568 if (pdata->smbus_timeout_disable &&
569 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
570 reg |= MAX6697_CONF_TIMEOUT;
571 }
572 if (pdata->extended_range_enable &&
573 (chip->valid_conf & MAX6581_CONF_EXTENDED)) {
574 reg |= MAX6581_CONF_EXTENDED;
575 data->temp_offset = 64;
576 }
577 if (pdata->resistance_cancellation &&
578 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) {
579 reg |= MAX6697_CONF_RESISTANCE;
580 factor++;
581 }
582 if (pdata->beta_compensation &&
583 (chip->valid_conf & MAX6693_CONF_BETA)) {
584 reg |= MAX6693_CONF_BETA;
585 }
586
587 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
588 if (ret < 0)
589 return ret;
590
591 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
592 MAX6697_MAP_BITS(pdata->alert_mask));
593 if (ret < 0)
594 return ret;
595
596 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
597 MAX6697_MAP_BITS(pdata->over_temperature_mask));
598 if (ret < 0)
599 return ret;
600
601 if (data->type == max6581) {
602 factor += hweight8(pdata->resistance_cancellation >> 1);
603 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
604 pdata->resistance_cancellation >> 1);
605 if (ret < 0)
606 return ret;
607 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
608 pdata->ideality_value);
609 if (ret < 0)
610 return ret;
611 ret = i2c_smbus_write_byte_data(client,
612 MAX6581_REG_IDEALITY_SELECT,
613 pdata->ideality_mask >> 1);
614 if (ret < 0)
615 return ret;
616 }
617done:
618 data->update_interval = factor * MAX6697_CONV_TIME;
619 return 0;
620}
621
622static int max6697_probe(struct i2c_client *client,
623 const struct i2c_device_id *id)
624{
625 struct i2c_adapter *adapter = client->adapter;
626 struct device *dev = &client->dev;
627 struct max6697_data *data;
628 int err;
629
630 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
631 return -ENODEV;
632
633 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
634 if (!data)
635 return -ENOMEM;
636
637 data->type = id->driver_data;
638 data->chip = &max6697_chip_data[data->type];
639
640 i2c_set_clientdata(client, data);
641 mutex_init(&data->update_lock);
642
643 err = max6697_init_chip(client);
644 if (err)
645 return err;
646
647 err = sysfs_create_group(&client->dev.kobj, &max6697_group);
648 if (err)
649 return err;
650
651 data->hwmon_dev = hwmon_device_register(dev);
652 if (IS_ERR(data->hwmon_dev)) {
653 err = PTR_ERR(data->hwmon_dev);
654 goto error;
655 }
656
657 return 0;
658
659error:
660 sysfs_remove_group(&client->dev.kobj, &max6697_group);
661 return err;
662}
663
664static int max6697_remove(struct i2c_client *client)
665{
666 struct max6697_data *data = i2c_get_clientdata(client);
667
668 hwmon_device_unregister(data->hwmon_dev);
669 sysfs_remove_group(&client->dev.kobj, &max6697_group);
670
671 return 0;
672}
673
674static const struct i2c_device_id max6697_id[] = {
675 { "max6581", max6581 },
676 { "max6602", max6602 },
677 { "max6622", max6622 },
678 { "max6636", max6636 },
679 { "max6689", max6689 },
680 { "max6693", max6693 },
681 { "max6694", max6694 },
682 { "max6697", max6697 },
683 { "max6698", max6698 },
684 { "max6699", max6699 },
685 { }
686};
687MODULE_DEVICE_TABLE(i2c, max6697_id);
688
689static struct i2c_driver max6697_driver = {
690 .class = I2C_CLASS_HWMON,
691 .driver = {
692 .name = "max6697",
693 },
694 .probe = max6697_probe,
695 .remove = max6697_remove,
696 .id_table = max6697_id,
697};
698
699module_i2c_driver(max6697_driver);
700
701MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
702MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
703MODULE_LICENSE("GPL");
704
