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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> | |
9e427083 | 27 | #include <linux/of_device.h> |
5372d2d7 GR |
28 | #include <linux/of.h> |
29 | ||
30 | #include <linux/platform_data/max6697.h> | |
31 | ||
32 | enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, | |
33 | max6697, max6698, max6699 }; | |
34 | ||
35 | /* Report local sensor as temp1 */ | |
36 | ||
37 | static const u8 MAX6697_REG_TEMP[] = { | |
38 | 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; | |
39 | static const u8 MAX6697_REG_TEMP_EXT[] = { | |
40 | 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; | |
41 | static const u8 MAX6697_REG_MAX[] = { | |
42 | 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; | |
43 | static const u8 MAX6697_REG_CRIT[] = { | |
44 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; | |
45 | ||
46 | /* | |
47 | * Map device tree / platform data register bit map to chip bit map. | |
48 | * Applies to alert register and over-temperature register. | |
49 | */ | |
50 | #define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ | |
51 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) | |
52 | ||
53 | #define MAX6697_REG_STAT(n) (0x44 + (n)) | |
54 | ||
55 | #define MAX6697_REG_CONFIG 0x41 | |
56 | #define MAX6581_CONF_EXTENDED (1 << 1) | |
57 | #define MAX6693_CONF_BETA (1 << 2) | |
58 | #define MAX6697_CONF_RESISTANCE (1 << 3) | |
59 | #define MAX6697_CONF_TIMEOUT (1 << 5) | |
60 | #define MAX6697_REG_ALERT_MASK 0x42 | |
61 | #define MAX6697_REG_OVERT_MASK 0x43 | |
62 | ||
63 | #define MAX6581_REG_RESISTANCE 0x4a | |
64 | #define MAX6581_REG_IDEALITY 0x4b | |
65 | #define MAX6581_REG_IDEALITY_SELECT 0x4c | |
66 | #define MAX6581_REG_OFFSET 0x4d | |
67 | #define MAX6581_REG_OFFSET_SELECT 0x4e | |
68 | ||
69 | #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ | |
70 | ||
71 | struct max6697_chip_data { | |
72 | int channels; | |
73 | u32 have_ext; | |
74 | u32 have_crit; | |
75 | u32 have_fault; | |
76 | u8 valid_conf; | |
77 | const u8 *alarm_map; | |
78 | }; | |
79 | ||
80 | struct max6697_data { | |
8d373552 | 81 | struct i2c_client *client; |
5372d2d7 GR |
82 | |
83 | enum chips type; | |
84 | const struct max6697_chip_data *chip; | |
85 | ||
86 | int update_interval; /* in milli-seconds */ | |
87 | int temp_offset; /* in degrees C */ | |
88 | ||
89 | struct mutex update_lock; | |
90 | unsigned long last_updated; /* In jiffies */ | |
91 | bool valid; /* true if following fields are valid */ | |
92 | ||
93 | /* 1x local and up to 7x remote */ | |
94 | u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ | |
95 | #define MAX6697_TEMP_INPUT 0 | |
96 | #define MAX6697_TEMP_EXT 1 | |
97 | #define MAX6697_TEMP_MAX 2 | |
98 | #define MAX6697_TEMP_CRIT 3 | |
99 | u32 alarms; | |
100 | }; | |
101 | ||
102 | /* Diode fault status bits on MAX6581 are right shifted by one bit */ | |
103 | static const u8 max6581_alarm_map[] = { | |
104 | 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, | |
105 | 16, 17, 18, 19, 20, 21, 22, 23 }; | |
106 | ||
107 | static const struct max6697_chip_data max6697_chip_data[] = { | |
108 | [max6581] = { | |
109 | .channels = 8, | |
110 | .have_crit = 0xff, | |
111 | .have_ext = 0x7f, | |
112 | .have_fault = 0xfe, | |
113 | .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, | |
114 | .alarm_map = max6581_alarm_map, | |
115 | }, | |
116 | [max6602] = { | |
117 | .channels = 5, | |
118 | .have_crit = 0x12, | |
119 | .have_ext = 0x02, | |
120 | .have_fault = 0x1e, | |
121 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
122 | }, | |
123 | [max6622] = { | |
124 | .channels = 5, | |
125 | .have_crit = 0x12, | |
126 | .have_ext = 0x02, | |
127 | .have_fault = 0x1e, | |
128 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
129 | }, | |
130 | [max6636] = { | |
131 | .channels = 7, | |
132 | .have_crit = 0x72, | |
133 | .have_ext = 0x02, | |
134 | .have_fault = 0x7e, | |
135 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
136 | }, | |
137 | [max6689] = { | |
138 | .channels = 7, | |
139 | .have_crit = 0x72, | |
140 | .have_ext = 0x02, | |
141 | .have_fault = 0x7e, | |
142 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
143 | }, | |
144 | [max6693] = { | |
145 | .channels = 7, | |
146 | .have_crit = 0x72, | |
147 | .have_ext = 0x02, | |
148 | .have_fault = 0x7e, | |
149 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
150 | MAX6697_CONF_TIMEOUT, | |
151 | }, | |
152 | [max6694] = { | |
153 | .channels = 5, | |
154 | .have_crit = 0x12, | |
155 | .have_ext = 0x02, | |
156 | .have_fault = 0x1e, | |
157 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
158 | MAX6697_CONF_TIMEOUT, | |
159 | }, | |
160 | [max6697] = { | |
161 | .channels = 7, | |
162 | .have_crit = 0x72, | |
163 | .have_ext = 0x02, | |
164 | .have_fault = 0x7e, | |
165 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
166 | }, | |
167 | [max6698] = { | |
168 | .channels = 7, | |
169 | .have_crit = 0x72, | |
170 | .have_ext = 0x02, | |
171 | .have_fault = 0x0e, | |
172 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
173 | }, | |
174 | [max6699] = { | |
175 | .channels = 5, | |
176 | .have_crit = 0x12, | |
177 | .have_ext = 0x02, | |
178 | .have_fault = 0x1e, | |
179 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
180 | }, | |
181 | }; | |
182 | ||
183 | static struct max6697_data *max6697_update_device(struct device *dev) | |
184 | { | |
8d373552 GR |
185 | struct max6697_data *data = dev_get_drvdata(dev); |
186 | struct i2c_client *client = data->client; | |
5372d2d7 GR |
187 | struct max6697_data *ret = data; |
188 | int val; | |
189 | int i; | |
190 | u32 alarms; | |
191 | ||
192 | mutex_lock(&data->update_lock); | |
193 | ||
194 | if (data->valid && | |
195 | !time_after(jiffies, data->last_updated | |
196 | + msecs_to_jiffies(data->update_interval))) | |
197 | goto abort; | |
198 | ||
199 | for (i = 0; i < data->chip->channels; i++) { | |
200 | if (data->chip->have_ext & (1 << i)) { | |
201 | val = i2c_smbus_read_byte_data(client, | |
202 | MAX6697_REG_TEMP_EXT[i]); | |
203 | if (unlikely(val < 0)) { | |
204 | ret = ERR_PTR(val); | |
205 | goto abort; | |
206 | } | |
207 | data->temp[i][MAX6697_TEMP_EXT] = val; | |
208 | } | |
209 | ||
210 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); | |
211 | if (unlikely(val < 0)) { | |
212 | ret = ERR_PTR(val); | |
213 | goto abort; | |
214 | } | |
215 | data->temp[i][MAX6697_TEMP_INPUT] = val; | |
216 | ||
217 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); | |
218 | if (unlikely(val < 0)) { | |
219 | ret = ERR_PTR(val); | |
220 | goto abort; | |
221 | } | |
222 | data->temp[i][MAX6697_TEMP_MAX] = val; | |
223 | ||
224 | if (data->chip->have_crit & (1 << i)) { | |
225 | val = i2c_smbus_read_byte_data(client, | |
226 | MAX6697_REG_CRIT[i]); | |
227 | if (unlikely(val < 0)) { | |
228 | ret = ERR_PTR(val); | |
229 | goto abort; | |
230 | } | |
231 | data->temp[i][MAX6697_TEMP_CRIT] = val; | |
232 | } | |
233 | } | |
234 | ||
235 | alarms = 0; | |
236 | for (i = 0; i < 3; i++) { | |
237 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); | |
238 | if (unlikely(val < 0)) { | |
239 | ret = ERR_PTR(val); | |
240 | goto abort; | |
241 | } | |
242 | alarms = (alarms << 8) | val; | |
243 | } | |
244 | data->alarms = alarms; | |
245 | data->last_updated = jiffies; | |
246 | data->valid = true; | |
247 | abort: | |
248 | mutex_unlock(&data->update_lock); | |
249 | ||
250 | return ret; | |
251 | } | |
252 | ||
740c2f2b | 253 | static ssize_t temp_input_show(struct device *dev, |
5372d2d7 GR |
254 | struct device_attribute *devattr, char *buf) |
255 | { | |
256 | int index = to_sensor_dev_attr(devattr)->index; | |
257 | struct max6697_data *data = max6697_update_device(dev); | |
258 | int temp; | |
259 | ||
260 | if (IS_ERR(data)) | |
261 | return PTR_ERR(data); | |
262 | ||
263 | temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; | |
264 | temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; | |
265 | ||
266 | return sprintf(buf, "%d\n", temp * 125); | |
267 | } | |
268 | ||
740c2f2b GR |
269 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
270 | char *buf) | |
5372d2d7 GR |
271 | { |
272 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
273 | int index = to_sensor_dev_attr_2(devattr)->index; | |
274 | struct max6697_data *data = max6697_update_device(dev); | |
275 | int temp; | |
276 | ||
277 | if (IS_ERR(data)) | |
278 | return PTR_ERR(data); | |
279 | ||
280 | temp = data->temp[nr][index]; | |
281 | temp -= data->temp_offset; | |
282 | ||
283 | return sprintf(buf, "%d\n", temp * 1000); | |
284 | } | |
285 | ||
740c2f2b | 286 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
5372d2d7 GR |
287 | char *buf) |
288 | { | |
289 | int index = to_sensor_dev_attr(attr)->index; | |
290 | struct max6697_data *data = max6697_update_device(dev); | |
291 | ||
292 | if (IS_ERR(data)) | |
293 | return PTR_ERR(data); | |
294 | ||
295 | if (data->chip->alarm_map) | |
296 | index = data->chip->alarm_map[index]; | |
297 | ||
298 | return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); | |
299 | } | |
300 | ||
740c2f2b GR |
301 | static ssize_t temp_store(struct device *dev, |
302 | struct device_attribute *devattr, const char *buf, | |
303 | size_t count) | |
5372d2d7 GR |
304 | { |
305 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
306 | int index = to_sensor_dev_attr_2(devattr)->index; | |
8d373552 | 307 | struct max6697_data *data = dev_get_drvdata(dev); |
5372d2d7 GR |
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; | |
8d373552 | 319 | ret = i2c_smbus_write_byte_data(data->client, |
5372d2d7 GR |
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 | ||
740c2f2b GR |
328 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); |
329 | static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); | |
330 | static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); | |
331 | ||
332 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); | |
333 | static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); | |
334 | static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); | |
335 | ||
336 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); | |
337 | static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); | |
338 | static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); | |
339 | ||
340 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); | |
341 | static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); | |
342 | static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); | |
343 | ||
344 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); | |
345 | static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); | |
346 | static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); | |
347 | ||
348 | static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); | |
349 | static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); | |
350 | static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); | |
351 | ||
352 | static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); | |
353 | static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); | |
354 | static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); | |
355 | ||
356 | static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); | |
357 | static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); | |
358 | static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); | |
359 | ||
360 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); | |
361 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); | |
362 | static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); | |
363 | static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); | |
364 | static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); | |
365 | static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); | |
366 | static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); | |
367 | static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); | |
368 | ||
369 | static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); | |
370 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); | |
371 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); | |
372 | static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); | |
373 | static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); | |
374 | static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); | |
375 | static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); | |
376 | static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); | |
377 | ||
378 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); | |
379 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); | |
380 | static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); | |
381 | static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); | |
382 | static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); | |
383 | static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); | |
384 | static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); | |
5372d2d7 | 385 | |
6bf44ced GR |
386 | static DEVICE_ATTR(dummy, 0, NULL, NULL); |
387 | ||
388 | static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, | |
389 | int index) | |
390 | { | |
391 | struct device *dev = container_of(kobj, struct device, kobj); | |
8d373552 | 392 | struct max6697_data *data = dev_get_drvdata(dev); |
6bf44ced GR |
393 | const struct max6697_chip_data *chip = data->chip; |
394 | int channel = index / 6; /* channel number */ | |
395 | int nr = index % 6; /* attribute index within channel */ | |
396 | ||
397 | if (channel >= chip->channels) | |
398 | return 0; | |
399 | ||
400 | if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) | |
401 | return 0; | |
402 | if (nr == 5 && !(chip->have_fault & (1 << channel))) | |
403 | return 0; | |
404 | ||
405 | return attr->mode; | |
406 | } | |
407 | ||
408 | /* | |
409 | * max6697_is_visible uses the index into the following array to determine | |
410 | * if attributes should be created or not. Any change in order or content | |
411 | * must be matched in max6697_is_visible. | |
412 | */ | |
413 | static struct attribute *max6697_attributes[] = { | |
414 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
415 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
416 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
417 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
418 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
419 | &dev_attr_dummy.attr, | |
420 | ||
421 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
422 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
423 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
424 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
425 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
426 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
427 | ||
428 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
429 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
430 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
431 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
432 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
433 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
434 | ||
435 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
436 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
437 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
438 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
439 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
440 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
441 | ||
442 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
443 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
444 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
445 | &sensor_dev_attr_temp5_crit.dev_attr.attr, | |
446 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, | |
447 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
448 | ||
449 | &sensor_dev_attr_temp6_input.dev_attr.attr, | |
450 | &sensor_dev_attr_temp6_max.dev_attr.attr, | |
451 | &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, | |
452 | &sensor_dev_attr_temp6_crit.dev_attr.attr, | |
453 | &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, | |
454 | &sensor_dev_attr_temp6_fault.dev_attr.attr, | |
455 | ||
456 | &sensor_dev_attr_temp7_input.dev_attr.attr, | |
457 | &sensor_dev_attr_temp7_max.dev_attr.attr, | |
458 | &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, | |
459 | &sensor_dev_attr_temp7_crit.dev_attr.attr, | |
460 | &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, | |
461 | &sensor_dev_attr_temp7_fault.dev_attr.attr, | |
462 | ||
463 | &sensor_dev_attr_temp8_input.dev_attr.attr, | |
464 | &sensor_dev_attr_temp8_max.dev_attr.attr, | |
465 | &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, | |
466 | &sensor_dev_attr_temp8_crit.dev_attr.attr, | |
467 | &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, | |
468 | &sensor_dev_attr_temp8_fault.dev_attr.attr, | |
469 | NULL | |
5372d2d7 GR |
470 | }; |
471 | ||
6bf44ced GR |
472 | static const struct attribute_group max6697_group = { |
473 | .attrs = max6697_attributes, .is_visible = max6697_is_visible, | |
5372d2d7 | 474 | }; |
8d373552 | 475 | __ATTRIBUTE_GROUPS(max6697); |
5372d2d7 GR |
476 | |
477 | static void max6697_get_config_of(struct device_node *node, | |
478 | struct max6697_platform_data *pdata) | |
479 | { | |
480 | int len; | |
481 | const __be32 *prop; | |
482 | ||
8de2dcc9 AL |
483 | pdata->smbus_timeout_disable = |
484 | of_property_read_bool(node, "smbus-timeout-disable"); | |
485 | pdata->extended_range_enable = | |
486 | of_property_read_bool(node, "extended-range-enable"); | |
487 | pdata->beta_compensation = | |
488 | of_property_read_bool(node, "beta-compensation-enable"); | |
489 | ||
5372d2d7 GR |
490 | prop = of_get_property(node, "alert-mask", &len); |
491 | if (prop && len == sizeof(u32)) | |
492 | pdata->alert_mask = be32_to_cpu(prop[0]); | |
493 | prop = of_get_property(node, "over-temperature-mask", &len); | |
494 | if (prop && len == sizeof(u32)) | |
495 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); | |
496 | prop = of_get_property(node, "resistance-cancellation", &len); | |
497 | if (prop) { | |
498 | if (len == sizeof(u32)) | |
499 | pdata->resistance_cancellation = be32_to_cpu(prop[0]); | |
500 | else | |
501 | pdata->resistance_cancellation = 0xfe; | |
502 | } | |
503 | prop = of_get_property(node, "transistor-ideality", &len); | |
504 | if (prop && len == 2 * sizeof(u32)) { | |
505 | pdata->ideality_mask = be32_to_cpu(prop[0]); | |
506 | pdata->ideality_value = be32_to_cpu(prop[1]); | |
507 | } | |
508 | } | |
509 | ||
8d373552 GR |
510 | static int max6697_init_chip(struct max6697_data *data, |
511 | struct i2c_client *client) | |
5372d2d7 | 512 | { |
5372d2d7 GR |
513 | struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); |
514 | struct max6697_platform_data p; | |
515 | const struct max6697_chip_data *chip = data->chip; | |
516 | int factor = chip->channels; | |
517 | int ret, reg; | |
518 | ||
519 | /* | |
520 | * Don't touch configuration if neither platform data nor OF | |
521 | * configuration was specified. If that is the case, use the | |
522 | * current chip configuration. | |
523 | */ | |
524 | if (!pdata && !client->dev.of_node) { | |
525 | reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); | |
526 | if (reg < 0) | |
527 | return reg; | |
528 | if (data->type == max6581) { | |
529 | if (reg & MAX6581_CONF_EXTENDED) | |
530 | data->temp_offset = 64; | |
531 | reg = i2c_smbus_read_byte_data(client, | |
532 | MAX6581_REG_RESISTANCE); | |
533 | if (reg < 0) | |
534 | return reg; | |
535 | factor += hweight8(reg); | |
536 | } else { | |
537 | if (reg & MAX6697_CONF_RESISTANCE) | |
538 | factor++; | |
539 | } | |
540 | goto done; | |
541 | } | |
542 | ||
543 | if (client->dev.of_node) { | |
544 | memset(&p, 0, sizeof(p)); | |
545 | max6697_get_config_of(client->dev.of_node, &p); | |
546 | pdata = &p; | |
547 | } | |
548 | ||
549 | reg = 0; | |
550 | if (pdata->smbus_timeout_disable && | |
551 | (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { | |
552 | reg |= MAX6697_CONF_TIMEOUT; | |
553 | } | |
554 | if (pdata->extended_range_enable && | |
555 | (chip->valid_conf & MAX6581_CONF_EXTENDED)) { | |
556 | reg |= MAX6581_CONF_EXTENDED; | |
557 | data->temp_offset = 64; | |
558 | } | |
559 | if (pdata->resistance_cancellation && | |
560 | (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { | |
561 | reg |= MAX6697_CONF_RESISTANCE; | |
562 | factor++; | |
563 | } | |
564 | if (pdata->beta_compensation && | |
565 | (chip->valid_conf & MAX6693_CONF_BETA)) { | |
566 | reg |= MAX6693_CONF_BETA; | |
567 | } | |
568 | ||
569 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); | |
570 | if (ret < 0) | |
571 | return ret; | |
572 | ||
573 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, | |
574 | MAX6697_MAP_BITS(pdata->alert_mask)); | |
575 | if (ret < 0) | |
576 | return ret; | |
577 | ||
578 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, | |
579 | MAX6697_MAP_BITS(pdata->over_temperature_mask)); | |
580 | if (ret < 0) | |
581 | return ret; | |
582 | ||
583 | if (data->type == max6581) { | |
584 | factor += hweight8(pdata->resistance_cancellation >> 1); | |
585 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, | |
586 | pdata->resistance_cancellation >> 1); | |
587 | if (ret < 0) | |
588 | return ret; | |
589 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, | |
5c52add1 | 590 | pdata->ideality_value); |
5372d2d7 GR |
591 | if (ret < 0) |
592 | return ret; | |
593 | ret = i2c_smbus_write_byte_data(client, | |
594 | MAX6581_REG_IDEALITY_SELECT, | |
5c52add1 | 595 | pdata->ideality_mask >> 1); |
5372d2d7 GR |
596 | if (ret < 0) |
597 | return ret; | |
598 | } | |
599 | done: | |
600 | data->update_interval = factor * MAX6697_CONV_TIME; | |
601 | return 0; | |
602 | } | |
603 | ||
5372d2d7 GR |
604 | static int max6697_probe(struct i2c_client *client, |
605 | const struct i2c_device_id *id) | |
606 | { | |
607 | struct i2c_adapter *adapter = client->adapter; | |
608 | struct device *dev = &client->dev; | |
609 | struct max6697_data *data; | |
8d373552 | 610 | struct device *hwmon_dev; |
6bf44ced | 611 | int err; |
5372d2d7 GR |
612 | |
613 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
614 | return -ENODEV; | |
615 | ||
616 | data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); | |
617 | if (!data) | |
618 | return -ENOMEM; | |
619 | ||
9e427083 JMC |
620 | if (client->dev.of_node) |
621 | data->type = (enum chips)of_device_get_match_data(&client->dev); | |
622 | else | |
623 | data->type = id->driver_data; | |
5372d2d7 | 624 | data->chip = &max6697_chip_data[data->type]; |
8d373552 | 625 | data->client = client; |
5372d2d7 GR |
626 | mutex_init(&data->update_lock); |
627 | ||
8d373552 | 628 | err = max6697_init_chip(data, client); |
5372d2d7 GR |
629 | if (err) |
630 | return err; | |
631 | ||
8d373552 GR |
632 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
633 | data, | |
634 | max6697_groups); | |
4109a716 | 635 | return PTR_ERR_OR_ZERO(hwmon_dev); |
5372d2d7 GR |
636 | } |
637 | ||
638 | static const struct i2c_device_id max6697_id[] = { | |
639 | { "max6581", max6581 }, | |
640 | { "max6602", max6602 }, | |
641 | { "max6622", max6622 }, | |
642 | { "max6636", max6636 }, | |
643 | { "max6689", max6689 }, | |
644 | { "max6693", max6693 }, | |
645 | { "max6694", max6694 }, | |
646 | { "max6697", max6697 }, | |
647 | { "max6698", max6698 }, | |
648 | { "max6699", max6699 }, | |
649 | { } | |
650 | }; | |
651 | MODULE_DEVICE_TABLE(i2c, max6697_id); | |
652 | ||
9e427083 JMC |
653 | static const struct of_device_id max6697_of_match[] = { |
654 | { | |
655 | .compatible = "maxim,max6581", | |
656 | .data = (void *)max6581 | |
657 | }, | |
658 | { | |
659 | .compatible = "maxim,max6602", | |
660 | .data = (void *)max6602 | |
661 | }, | |
662 | { | |
663 | .compatible = "maxim,max6622", | |
664 | .data = (void *)max6622 | |
665 | }, | |
666 | { | |
667 | .compatible = "maxim,max6636", | |
668 | .data = (void *)max6636 | |
669 | }, | |
670 | { | |
671 | .compatible = "maxim,max6689", | |
672 | .data = (void *)max6689 | |
673 | }, | |
674 | { | |
675 | .compatible = "maxim,max6693", | |
676 | .data = (void *)max6693 | |
677 | }, | |
678 | { | |
679 | .compatible = "maxim,max6694", | |
680 | .data = (void *)max6694 | |
681 | }, | |
682 | { | |
683 | .compatible = "maxim,max6697", | |
684 | .data = (void *)max6697 | |
685 | }, | |
686 | { | |
687 | .compatible = "maxim,max6698", | |
688 | .data = (void *)max6698 | |
689 | }, | |
690 | { | |
691 | .compatible = "maxim,max6699", | |
692 | .data = (void *)max6699 | |
693 | }, | |
694 | { }, | |
695 | }; | |
696 | MODULE_DEVICE_TABLE(of, max6697_of_match); | |
697 | ||
5372d2d7 GR |
698 | static struct i2c_driver max6697_driver = { |
699 | .class = I2C_CLASS_HWMON, | |
700 | .driver = { | |
701 | .name = "max6697", | |
9e427083 | 702 | .of_match_table = of_match_ptr(max6697_of_match), |
5372d2d7 GR |
703 | }, |
704 | .probe = max6697_probe, | |
5372d2d7 GR |
705 | .id_table = max6697_id, |
706 | }; | |
707 | ||
708 | module_i2c_driver(max6697_driver); | |
709 | ||
710 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
711 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); | |
712 | MODULE_LICENSE("GPL"); |