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Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik...
[mirror_ubuntu-artful-kernel.git] / drivers / hwmon / max6697.c
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5372d2d7
GR		 1/*
2 * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
3 *
4 * based on max1668.c
5 * Copyright (c) 2011 David George <david.george@ska.ac.za>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
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/* Report local sensor as temp1 */
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 * Map device tree / platform data register bit map to chip bit map.
47 * Applies to alert register and over-temperature register.
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 /* ms per channel, worst case */
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; /* in milli-seconds */
86 int temp_offset; /* in degrees C */
87
88 struct mutex update_lock;
89 unsigned long last_updated; /* In jiffies */
90 bool valid; /* true if following fields are valid */
91
92 /* 1x local and up to 7x remote */
93 u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */
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/* Diode fault status bits on MAX6581 are right shifted by one bit */
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 struct attribute *max6697_attributes[8][7] = {
403 {
404 &sensor_dev_attr_temp1_input.dev_attr.attr,
405 &sensor_dev_attr_temp1_max.dev_attr.attr,
406 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
407 &sensor_dev_attr_temp1_crit.dev_attr.attr,
408 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
409 NULL
410 }, {
411 &sensor_dev_attr_temp2_input.dev_attr.attr,
412 &sensor_dev_attr_temp2_max.dev_attr.attr,
413 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
414 &sensor_dev_attr_temp2_crit.dev_attr.attr,
415 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
416 &sensor_dev_attr_temp2_fault.dev_attr.attr,
417 NULL
418 }, {
419 &sensor_dev_attr_temp3_input.dev_attr.attr,
420 &sensor_dev_attr_temp3_max.dev_attr.attr,
421 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
422 &sensor_dev_attr_temp3_crit.dev_attr.attr,
423 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
424 &sensor_dev_attr_temp3_fault.dev_attr.attr,
425 NULL
426 }, {
427 &sensor_dev_attr_temp4_input.dev_attr.attr,
428 &sensor_dev_attr_temp4_max.dev_attr.attr,
429 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
430 &sensor_dev_attr_temp4_crit.dev_attr.attr,
431 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
432 &sensor_dev_attr_temp4_fault.dev_attr.attr,
433 NULL
434 }, {
435 &sensor_dev_attr_temp5_input.dev_attr.attr,
436 &sensor_dev_attr_temp5_max.dev_attr.attr,
437 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
438 &sensor_dev_attr_temp5_crit.dev_attr.attr,
439 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
440 &sensor_dev_attr_temp5_fault.dev_attr.attr,
441 NULL
442 }, {
443 &sensor_dev_attr_temp6_input.dev_attr.attr,
444 &sensor_dev_attr_temp6_max.dev_attr.attr,
445 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
446 &sensor_dev_attr_temp6_crit.dev_attr.attr,
447 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
448 &sensor_dev_attr_temp6_fault.dev_attr.attr,
449 NULL
450 }, {
451 &sensor_dev_attr_temp7_input.dev_attr.attr,
452 &sensor_dev_attr_temp7_max.dev_attr.attr,
453 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
454 &sensor_dev_attr_temp7_crit.dev_attr.attr,
455 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
456 &sensor_dev_attr_temp7_fault.dev_attr.attr,
457 NULL
458 }, {
459 &sensor_dev_attr_temp8_input.dev_attr.attr,
460 &sensor_dev_attr_temp8_max.dev_attr.attr,
461 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
462 &sensor_dev_attr_temp8_crit.dev_attr.attr,
463 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
464 &sensor_dev_attr_temp8_fault.dev_attr.attr,
465 NULL
466 }
467};
468
469static const struct attribute_group max6697_group[8] = {
470 { .attrs = max6697_attributes[0] },
471 { .attrs = max6697_attributes[1] },
472 { .attrs = max6697_attributes[2] },
473 { .attrs = max6697_attributes[3] },
474 { .attrs = max6697_attributes[4] },
475 { .attrs = max6697_attributes[5] },
476 { .attrs = max6697_attributes[6] },
477 { .attrs = max6697_attributes[7] },
478};
479
480static void max6697_get_config_of(struct device_node *node,
481 struct max6697_platform_data *pdata)
482{
483 int len;
484 const __be32 *prop;
485
486 prop = of_get_property(node, "smbus-timeout-disable", &len);
487 if (prop)
488 pdata->smbus_timeout_disable = true;
489 prop = of_get_property(node, "extended-range-enable", &len);
490 if (prop)
491 pdata->extended_range_enable = true;
492 prop = of_get_property(node, "beta-compensation-enable", &len);
493 if (prop)
494 pdata->beta_compensation = true;
495 prop = of_get_property(node, "alert-mask", &len);
496 if (prop && len == sizeof(u32))
497 pdata->alert_mask = be32_to_cpu(prop[0]);
498 prop = of_get_property(node, "over-temperature-mask", &len);
499 if (prop && len == sizeof(u32))
500 pdata->over_temperature_mask = be32_to_cpu(prop[0]);
501 prop = of_get_property(node, "resistance-cancellation", &len);
502 if (prop) {
503 if (len == sizeof(u32))
504 pdata->resistance_cancellation = be32_to_cpu(prop[0]);
505 else
506 pdata->resistance_cancellation = 0xfe;
507 }
508 prop = of_get_property(node, "transistor-ideality", &len);
509 if (prop && len == 2 * sizeof(u32)) {
510 pdata->ideality_mask = be32_to_cpu(prop[0]);
511 pdata->ideality_value = be32_to_cpu(prop[1]);
512 }
513}
514
515static int max6697_init_chip(struct i2c_client *client)
516{
517 struct max6697_data *data = i2c_get_clientdata(client);
518 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
519 struct max6697_platform_data p;
520 const struct max6697_chip_data *chip = data->chip;
521 int factor = chip->channels;
522 int ret, reg;
523
524 /*
525 * Don't touch configuration if neither platform data nor OF
526 * configuration was specified. If that is the case, use the
527 * current chip configuration.
528 */
529 if (!pdata && !client->dev.of_node) {
530 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG);
531 if (reg < 0)
532 return reg;
533 if (data->type == max6581) {
534 if (reg & MAX6581_CONF_EXTENDED)
535 data->temp_offset = 64;
536 reg = i2c_smbus_read_byte_data(client,
537 MAX6581_REG_RESISTANCE);
538 if (reg < 0)
539 return reg;
540 factor += hweight8(reg);
541 } else {
542 if (reg & MAX6697_CONF_RESISTANCE)
543 factor++;
544 }
545 goto done;
546 }
547
548 if (client->dev.of_node) {
549 memset(&p, 0, sizeof(p));
550 max6697_get_config_of(client->dev.of_node, &p);
551 pdata = &p;
552 }
553
554 reg = 0;
555 if (pdata->smbus_timeout_disable &&
556 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
557 reg |= MAX6697_CONF_TIMEOUT;
558 }
559 if (pdata->extended_range_enable &&
560 (chip->valid_conf & MAX6581_CONF_EXTENDED)) {
561 reg |= MAX6581_CONF_EXTENDED;
562 data->temp_offset = 64;
563 }
564 if (pdata->resistance_cancellation &&
565 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) {
566 reg |= MAX6697_CONF_RESISTANCE;
567 factor++;
568 }
569 if (pdata->beta_compensation &&
570 (chip->valid_conf & MAX6693_CONF_BETA)) {
571 reg |= MAX6693_CONF_BETA;
572 }
573
574 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
575 if (ret < 0)
576 return ret;
577
578 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
579 MAX6697_MAP_BITS(pdata->alert_mask));
580 if (ret < 0)
581 return ret;
582
583 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
584 MAX6697_MAP_BITS(pdata->over_temperature_mask));
585 if (ret < 0)
586 return ret;
587
588 if (data->type == max6581) {
589 factor += hweight8(pdata->resistance_cancellation >> 1);
590 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
591 pdata->resistance_cancellation >> 1);
592 if (ret < 0)
593 return ret;
594 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
595 pdata->ideality_mask >> 1);
596 if (ret < 0)
597 return ret;
598 ret = i2c_smbus_write_byte_data(client,
599 MAX6581_REG_IDEALITY_SELECT,
600 pdata->ideality_value);
601 if (ret < 0)
602 return ret;
603 }
604done:
605 data->update_interval = factor * MAX6697_CONV_TIME;
606 return 0;
607}
608
609static void max6697_remove_files(struct i2c_client *client)
610{
611 int i;
612
613 for (i = 0; i < ARRAY_SIZE(max6697_group); i++)
614 sysfs_remove_group(&client->dev.kobj, &max6697_group[i]);
615}
616
617static int max6697_probe(struct i2c_client *client,
618 const struct i2c_device_id *id)
619{
620 struct i2c_adapter *adapter = client->adapter;
621 struct device *dev = &client->dev;
622 struct max6697_data *data;
623 int i, err;
624
625 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
626 return -ENODEV;
627
628 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
629 if (!data)
630 return -ENOMEM;
631
632 data->type = id->driver_data;
633 data->chip = &max6697_chip_data[data->type];
634
635 i2c_set_clientdata(client, data);
636 mutex_init(&data->update_lock);
637
638 err = max6697_init_chip(client);
639 if (err)
640 return err;
641
642 for (i = 0; i < data->chip->channels; i++) {
643 err = sysfs_create_file(&dev->kobj,
644 max6697_attributes[i][0]);
645 if (err)
646 goto error;
647 err = sysfs_create_file(&dev->kobj,
648 max6697_attributes[i][1]);
649 if (err)
650 goto error;
651 err = sysfs_create_file(&dev->kobj,
652 max6697_attributes[i][2]);
653 if (err)
654 goto error;
655
656 if (data->chip->have_crit & (1 << i)) {
657 err = sysfs_create_file(&dev->kobj,
658 max6697_attributes[i][3]);
659 if (err)
660 goto error;
661 err = sysfs_create_file(&dev->kobj,
662 max6697_attributes[i][4]);
663 if (err)
664 goto error;
665 }
666 if (data->chip->have_fault & (1 << i)) {
667 err = sysfs_create_file(&dev->kobj,
668 max6697_attributes[i][5]);
669 if (err)
670 goto error;
671 }
672 }
673
674 data->hwmon_dev = hwmon_device_register(dev);
675 if (IS_ERR(data->hwmon_dev)) {
676 err = PTR_ERR(data->hwmon_dev);
677 goto error;
678 }
679
680 return 0;
681
682error:
683 max6697_remove_files(client);
684 return err;
685}
686
687static int max6697_remove(struct i2c_client *client)
688{
689 struct max6697_data *data = i2c_get_clientdata(client);
690
691 hwmon_device_unregister(data->hwmon_dev);
692 max6697_remove_files(client);
693
694 return 0;
695}
696
697static const struct i2c_device_id max6697_id[] = {
698 { "max6581", max6581 },
699 { "max6602", max6602 },
700 { "max6622", max6622 },
701 { "max6636", max6636 },
702 { "max6689", max6689 },
703 { "max6693", max6693 },
704 { "max6694", max6694 },
705 { "max6697", max6697 },
706 { "max6698", max6698 },
707 { "max6699", max6699 },
708 { }
709};
710MODULE_DEVICE_TABLE(i2c, max6697_id);
711
712static struct i2c_driver max6697_driver = {
713 .class = I2C_CLASS_HWMON,
714 .driver = {
715 .name = "max6697",
716 },
717 .probe = max6697_probe,
718 .remove = max6697_remove,
719 .id_table = max6697_id,
720};
721
722module_i2c_driver(max6697_driver);
723
724MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
725MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
726MODULE_LICENSE("GPL");
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