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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 | ||
31 | enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, | |
32 | max6697, max6698, max6699 }; | |
33 | ||
34 | /* Report local sensor as temp1 */ | |
35 | ||
36 | static const u8 MAX6697_REG_TEMP[] = { | |
37 | 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; | |
38 | static const u8 MAX6697_REG_TEMP_EXT[] = { | |
39 | 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; | |
40 | static const u8 MAX6697_REG_MAX[] = { | |
41 | 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; | |
42 | static 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 | ||
70 | struct 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 | ||
79 | struct 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 */ | |
102 | static 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 | ||
106 | static 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 | ||
182 | static 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; | |
246 | abort: | |
247 | mutex_unlock(&data->update_lock); | |
248 | ||
249 | return ret; | |
250 | } | |
251 | ||
252 | static 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 | ||
268 | static 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 | ||
285 | static 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 | ||
300 | static 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 | ||
328 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0); | |
329 | static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
330 | 0, MAX6697_TEMP_MAX); | |
331 | static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
332 | 0, MAX6697_TEMP_CRIT); | |
333 | ||
334 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1); | |
335 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
336 | 1, MAX6697_TEMP_MAX); | |
337 | static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
338 | 1, MAX6697_TEMP_CRIT); | |
339 | ||
340 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2); | |
341 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
342 | 2, MAX6697_TEMP_MAX); | |
343 | static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
344 | 2, MAX6697_TEMP_CRIT); | |
345 | ||
346 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3); | |
347 | static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
348 | 3, MAX6697_TEMP_MAX); | |
349 | static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
350 | 3, MAX6697_TEMP_CRIT); | |
351 | ||
352 | static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4); | |
353 | static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
354 | 4, MAX6697_TEMP_MAX); | |
355 | static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
356 | 4, MAX6697_TEMP_CRIT); | |
357 | ||
358 | static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5); | |
359 | static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
360 | 5, MAX6697_TEMP_MAX); | |
361 | static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
362 | 5, MAX6697_TEMP_CRIT); | |
363 | ||
364 | static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_input, NULL, 6); | |
365 | static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
366 | 6, MAX6697_TEMP_MAX); | |
367 | static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
368 | 6, MAX6697_TEMP_CRIT); | |
369 | ||
370 | static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_input, NULL, 7); | |
371 | static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
372 | 7, MAX6697_TEMP_MAX); | |
373 | static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, | |
374 | 7, MAX6697_TEMP_CRIT); | |
375 | ||
376 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22); | |
377 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16); | |
378 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17); | |
379 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18); | |
380 | static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19); | |
381 | static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20); | |
382 | static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21); | |
383 | static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23); | |
384 | ||
385 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14); | |
386 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8); | |
387 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
388 | static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10); | |
389 | static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11); | |
390 | static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12); | |
391 | static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13); | |
392 | static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15); | |
393 | ||
394 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1); | |
395 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); | |
396 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3); | |
397 | static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4); | |
398 | static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5); | |
399 | static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6); | |
400 | static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7); | |
401 | ||
402 | static 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 | ||
469 | static 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 | ||
480 | static 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 | ||
515 | static 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 | } | |
604 | done: | |
605 | data->update_interval = factor * MAX6697_CONV_TIME; | |
606 | return 0; | |
607 | } | |
608 | ||
609 | static 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 | ||
617 | static 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 | ||
682 | error: | |
683 | max6697_remove_files(client); | |
684 | return err; | |
685 | } | |
686 | ||
687 | static 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 | ||
697 | static 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 | }; | |
710 | MODULE_DEVICE_TABLE(i2c, max6697_id); | |
711 | ||
712 | static 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 | ||
722 | module_i2c_driver(max6697_driver); | |
723 | ||
724 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
725 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); | |
726 | MODULE_LICENSE("GPL"); |