1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net> |
4 | * |
5 | * based on max1668.c |
6 | * Copyright (c) 2011 David George <david.george@ska.ac.za> |
7 | */ |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> |
11 | #include <linux/slab.h> |
12 | #include <linux/jiffies.h> |
13 | #include <linux/i2c.h> |
14 | #include <linux/hwmon.h> |
15 | #include <linux/hwmon-sysfs.h> |
16 | #include <linux/err.h> |
17 | #include <linux/mutex.h> |
18 | #include <linux/of.h> |
19 | |
20 | #include <linux/platform_data/max6697.h> |
21 | |
22 | enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, |
23 | max6697, max6698, max6699 }; |
24 | |
25 | /* Report local sensor as temp1 */ |
26 | |
27 | static const u8 MAX6697_REG_TEMP[] = { |
28 | 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; |
29 | static const u8 MAX6697_REG_TEMP_EXT[] = { |
30 | 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; |
31 | static const u8 MAX6697_REG_MAX[] = { |
32 | 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; |
33 | static const u8 MAX6697_REG_CRIT[] = { |
34 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; |
35 | |
36 | /* |
37 | * Map device tree / platform data register bit map to chip bit map. |
38 | * Applies to alert register and over-temperature register. |
39 | */ |
40 | #define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ |
41 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) |
42 | #define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) |
43 | |
44 | #define MAX6697_REG_STAT(n) (0x44 + (n)) |
45 | |
46 | #define MAX6697_REG_CONFIG 0x41 |
47 | #define MAX6581_CONF_EXTENDED (1 << 1) |
48 | #define MAX6693_CONF_BETA (1 << 2) |
49 | #define MAX6697_CONF_RESISTANCE (1 << 3) |
50 | #define MAX6697_CONF_TIMEOUT (1 << 5) |
51 | #define MAX6697_REG_ALERT_MASK 0x42 |
52 | #define MAX6697_REG_OVERT_MASK 0x43 |
53 | |
54 | #define MAX6581_REG_RESISTANCE 0x4a |
55 | #define MAX6581_REG_IDEALITY 0x4b |
56 | #define MAX6581_REG_IDEALITY_SELECT 0x4c |
57 | #define MAX6581_REG_OFFSET 0x4d |
58 | #define MAX6581_REG_OFFSET_SELECT 0x4e |
59 | #define MAX6581_OFFSET_MIN -31750 |
60 | #define MAX6581_OFFSET_MAX 31750 |
61 | |
62 | #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ |
63 | |
64 | struct max6697_chip_data { |
65 | int channels; |
66 | u32 have_ext; |
67 | u32 have_crit; |
68 | u32 have_fault; |
69 | u8 valid_conf; |
70 | const u8 *alarm_map; |
71 | }; |
72 | |
73 | struct max6697_data { |
74 | struct i2c_client *client; |
75 | |
76 | enum chips type; |
77 | const struct max6697_chip_data *chip; |
78 | |
79 | int update_interval; /* in milli-seconds */ |
80 | int temp_offset; /* in degrees C */ |
81 | |
82 | struct mutex update_lock; |
83 | unsigned long last_updated; /* In jiffies */ |
84 | bool valid; /* true if following fields are valid */ |
85 | |
86 | /* 1x local and up to 7x remote */ |
87 | u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ |
88 | #define MAX6697_TEMP_INPUT 0 |
89 | #define MAX6697_TEMP_EXT 1 |
90 | #define MAX6697_TEMP_MAX 2 |
91 | #define MAX6697_TEMP_CRIT 3 |
92 | u32 alarms; |
93 | }; |
94 | |
95 | /* Diode fault status bits on MAX6581 are right shifted by one bit */ |
96 | static const u8 max6581_alarm_map[] = { |
97 | 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, |
98 | 16, 17, 18, 19, 20, 21, 22, 23 }; |
99 | |
100 | static const struct max6697_chip_data max6697_chip_data[] = { |
101 | [max6581] = { |
102 | .channels = 8, |
103 | .have_crit = 0xff, |
104 | .have_ext = 0x7f, |
105 | .have_fault = 0xfe, |
106 | .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, |
107 | .alarm_map = max6581_alarm_map, |
108 | }, |
109 | [max6602] = { |
110 | .channels = 5, |
111 | .have_crit = 0x12, |
112 | .have_ext = 0x02, |
113 | .have_fault = 0x1e, |
114 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
115 | }, |
116 | [max6622] = { |
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 | [max6636] = { |
124 | .channels = 7, |
125 | .have_crit = 0x72, |
126 | .have_ext = 0x02, |
127 | .have_fault = 0x7e, |
128 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
129 | }, |
130 | [max6689] = { |
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 | [max6693] = { |
138 | .channels = 7, |
139 | .have_crit = 0x72, |
140 | .have_ext = 0x02, |
141 | .have_fault = 0x7e, |
142 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
143 | MAX6697_CONF_TIMEOUT, |
144 | }, |
145 | [max6694] = { |
146 | .channels = 5, |
147 | .have_crit = 0x12, |
148 | .have_ext = 0x02, |
149 | .have_fault = 0x1e, |
150 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | |
151 | MAX6697_CONF_TIMEOUT, |
152 | }, |
153 | [max6697] = { |
154 | .channels = 7, |
155 | .have_crit = 0x72, |
156 | .have_ext = 0x02, |
157 | .have_fault = 0x7e, |
158 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
159 | }, |
160 | [max6698] = { |
161 | .channels = 7, |
162 | .have_crit = 0x72, |
163 | .have_ext = 0x02, |
164 | .have_fault = 0x0e, |
165 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
166 | }, |
167 | [max6699] = { |
168 | .channels = 5, |
169 | .have_crit = 0x12, |
170 | .have_ext = 0x02, |
171 | .have_fault = 0x1e, |
172 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, |
173 | }, |
174 | }; |
175 | |
176 | static inline int max6581_offset_to_millic(int val) |
177 | { |
178 | return sign_extend32(value: val, index: 7) * 250; |
179 | } |
180 | |
181 | static struct max6697_data *max6697_update_device(struct device *dev) |
182 | { |
183 | struct max6697_data *data = dev_get_drvdata(dev); |
184 | struct i2c_client *client = data->client; |
185 | struct max6697_data *ret = data; |
186 | int val; |
187 | int i; |
188 | u32 alarms; |
189 | |
190 | mutex_lock(&data->update_lock); |
191 | |
192 | if (data->valid && |
193 | !time_after(jiffies, data->last_updated |
194 | + msecs_to_jiffies(data->update_interval))) |
195 | goto abort; |
196 | |
197 | for (i = 0; i < data->chip->channels; i++) { |
198 | if (data->chip->have_ext & (1 << i)) { |
199 | val = i2c_smbus_read_byte_data(client, |
200 | command: MAX6697_REG_TEMP_EXT[i]); |
201 | if (unlikely(val < 0)) { |
202 | ret = ERR_PTR(error: val); |
203 | goto abort; |
204 | } |
205 | data->temp[i][MAX6697_TEMP_EXT] = val; |
206 | } |
207 | |
208 | val = i2c_smbus_read_byte_data(client, command: MAX6697_REG_TEMP[i]); |
209 | if (unlikely(val < 0)) { |
210 | ret = ERR_PTR(error: val); |
211 | goto abort; |
212 | } |
213 | data->temp[i][MAX6697_TEMP_INPUT] = val; |
214 | |
215 | val = i2c_smbus_read_byte_data(client, command: MAX6697_REG_MAX[i]); |
216 | if (unlikely(val < 0)) { |
217 | ret = ERR_PTR(error: val); |
218 | goto abort; |
219 | } |
220 | data->temp[i][MAX6697_TEMP_MAX] = val; |
221 | |
222 | if (data->chip->have_crit & (1 << i)) { |
223 | val = i2c_smbus_read_byte_data(client, |
224 | command: MAX6697_REG_CRIT[i]); |
225 | if (unlikely(val < 0)) { |
226 | ret = ERR_PTR(error: val); |
227 | goto abort; |
228 | } |
229 | data->temp[i][MAX6697_TEMP_CRIT] = val; |
230 | } |
231 | } |
232 | |
233 | alarms = 0; |
234 | for (i = 0; i < 3; i++) { |
235 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); |
236 | if (unlikely(val < 0)) { |
237 | ret = ERR_PTR(error: val); |
238 | goto abort; |
239 | } |
240 | alarms = (alarms << 8) | val; |
241 | } |
242 | data->alarms = alarms; |
243 | data->last_updated = jiffies; |
244 | data->valid = true; |
245 | abort: |
246 | mutex_unlock(lock: &data->update_lock); |
247 | |
248 | return ret; |
249 | } |
250 | |
251 | static ssize_t temp_input_show(struct device *dev, |
252 | struct device_attribute *devattr, char *buf) |
253 | { |
254 | int index = to_sensor_dev_attr(devattr)->index; |
255 | struct max6697_data *data = max6697_update_device(dev); |
256 | int temp; |
257 | |
258 | if (IS_ERR(ptr: data)) |
259 | return PTR_ERR(ptr: data); |
260 | |
261 | temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; |
262 | temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; |
263 | |
264 | return sprintf(buf, fmt: "%d\n" , temp * 125); |
265 | } |
266 | |
267 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
268 | char *buf) |
269 | { |
270 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
271 | int index = to_sensor_dev_attr_2(devattr)->index; |
272 | struct max6697_data *data = max6697_update_device(dev); |
273 | int temp; |
274 | |
275 | if (IS_ERR(ptr: data)) |
276 | return PTR_ERR(ptr: data); |
277 | |
278 | temp = data->temp[nr][index]; |
279 | temp -= data->temp_offset; |
280 | |
281 | return sprintf(buf, fmt: "%d\n" , temp * 1000); |
282 | } |
283 | |
284 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
285 | char *buf) |
286 | { |
287 | int index = to_sensor_dev_attr(attr)->index; |
288 | struct max6697_data *data = max6697_update_device(dev); |
289 | |
290 | if (IS_ERR(ptr: data)) |
291 | return PTR_ERR(ptr: data); |
292 | |
293 | if (data->chip->alarm_map) |
294 | index = data->chip->alarm_map[index]; |
295 | |
296 | return sprintf(buf, fmt: "%u\n" , (data->alarms >> index) & 0x1); |
297 | } |
298 | |
299 | static ssize_t temp_store(struct device *dev, |
300 | struct device_attribute *devattr, const char *buf, |
301 | size_t count) |
302 | { |
303 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
304 | int index = to_sensor_dev_attr_2(devattr)->index; |
305 | struct max6697_data *data = dev_get_drvdata(dev); |
306 | long temp; |
307 | int ret; |
308 | |
309 | ret = kstrtol(s: buf, base: 10, res: &temp); |
310 | if (ret < 0) |
311 | return ret; |
312 | |
313 | mutex_lock(&data->update_lock); |
314 | temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; |
315 | temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); |
316 | data->temp[nr][index] = temp; |
317 | ret = i2c_smbus_write_byte_data(client: data->client, |
318 | command: index == 2 ? MAX6697_REG_MAX[nr] |
319 | : MAX6697_REG_CRIT[nr], |
320 | value: temp); |
321 | mutex_unlock(lock: &data->update_lock); |
322 | |
323 | return ret < 0 ? ret : count; |
324 | } |
325 | |
326 | static ssize_t offset_store(struct device *dev, struct device_attribute *devattr, const char *buf, |
327 | size_t count) |
328 | { |
329 | int val, ret, index, select; |
330 | struct max6697_data *data; |
331 | bool channel_enabled; |
332 | long temp; |
333 | |
334 | index = to_sensor_dev_attr(devattr)->index; |
335 | data = dev_get_drvdata(dev); |
336 | ret = kstrtol(s: buf, base: 10, res: &temp); |
337 | if (ret < 0) |
338 | return ret; |
339 | |
340 | mutex_lock(&data->update_lock); |
341 | select = i2c_smbus_read_byte_data(client: data->client, MAX6581_REG_OFFSET_SELECT); |
342 | if (select < 0) { |
343 | ret = select; |
344 | goto abort; |
345 | } |
346 | channel_enabled = (select & (1 << (index - 1))); |
347 | temp = clamp_val(temp, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX); |
348 | val = DIV_ROUND_CLOSEST(temp, 250); |
349 | /* disable the offset for channel if the new offset is 0 */ |
350 | if (val == 0) { |
351 | if (channel_enabled) |
352 | ret = i2c_smbus_write_byte_data(client: data->client, MAX6581_REG_OFFSET_SELECT, |
353 | value: select & ~(1 << (index - 1))); |
354 | ret = ret < 0 ? ret : count; |
355 | goto abort; |
356 | } |
357 | if (!channel_enabled) { |
358 | ret = i2c_smbus_write_byte_data(client: data->client, MAX6581_REG_OFFSET_SELECT, |
359 | value: select | (1 << (index - 1))); |
360 | if (ret < 0) |
361 | goto abort; |
362 | } |
363 | ret = i2c_smbus_write_byte_data(client: data->client, MAX6581_REG_OFFSET, value: val); |
364 | ret = ret < 0 ? ret : count; |
365 | |
366 | abort: |
367 | mutex_unlock(lock: &data->update_lock); |
368 | return ret; |
369 | } |
370 | |
371 | static ssize_t offset_show(struct device *dev, struct device_attribute *devattr, char *buf) |
372 | { |
373 | struct max6697_data *data; |
374 | int select, ret, index; |
375 | |
376 | index = to_sensor_dev_attr(devattr)->index; |
377 | data = dev_get_drvdata(dev); |
378 | mutex_lock(&data->update_lock); |
379 | select = i2c_smbus_read_byte_data(client: data->client, MAX6581_REG_OFFSET_SELECT); |
380 | if (select < 0) |
381 | ret = select; |
382 | else if (select & (1 << (index - 1))) |
383 | ret = i2c_smbus_read_byte_data(client: data->client, MAX6581_REG_OFFSET); |
384 | else |
385 | ret = 0; |
386 | mutex_unlock(lock: &data->update_lock); |
387 | return ret < 0 ? ret : sprintf(buf, fmt: "%d\n" , max6581_offset_to_millic(val: ret)); |
388 | } |
389 | |
390 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); |
391 | static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); |
392 | static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); |
393 | |
394 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); |
395 | static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); |
396 | static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); |
397 | |
398 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); |
399 | static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); |
400 | static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); |
401 | |
402 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); |
403 | static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); |
404 | static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); |
405 | |
406 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); |
407 | static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); |
408 | static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); |
409 | |
410 | static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); |
411 | static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); |
412 | static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); |
413 | |
414 | static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); |
415 | static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); |
416 | static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); |
417 | |
418 | static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); |
419 | static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); |
420 | static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); |
421 | |
422 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); |
423 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); |
424 | static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); |
425 | static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); |
426 | static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); |
427 | static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); |
428 | static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); |
429 | static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); |
430 | |
431 | static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); |
432 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); |
433 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); |
434 | static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); |
435 | static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); |
436 | static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); |
437 | static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); |
438 | static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); |
439 | |
440 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); |
441 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); |
442 | static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); |
443 | static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); |
444 | static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); |
445 | static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); |
446 | static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); |
447 | |
448 | /* There is no offset for local temperature so starting from temp2 */ |
449 | static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 1); |
450 | static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 2); |
451 | static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 3); |
452 | static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 4); |
453 | static SENSOR_DEVICE_ATTR_RW(temp6_offset, offset, 5); |
454 | static SENSOR_DEVICE_ATTR_RW(temp7_offset, offset, 6); |
455 | static SENSOR_DEVICE_ATTR_RW(temp8_offset, offset, 7); |
456 | |
457 | static DEVICE_ATTR(dummy, 0, NULL, NULL); |
458 | |
459 | static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, |
460 | int index) |
461 | { |
462 | struct device *dev = kobj_to_dev(kobj); |
463 | struct max6697_data *data = dev_get_drvdata(dev); |
464 | const struct max6697_chip_data *chip = data->chip; |
465 | int channel = index / 7; /* channel number */ |
466 | int nr = index % 7; /* attribute index within channel */ |
467 | |
468 | if (channel >= chip->channels) |
469 | return 0; |
470 | |
471 | if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) |
472 | return 0; |
473 | if (nr == 5 && !(chip->have_fault & (1 << channel))) |
474 | return 0; |
475 | /* offset reg is only supported on max6581 remote channels */ |
476 | if (nr == 6) |
477 | if (data->type != max6581 || channel == 0) |
478 | return 0; |
479 | |
480 | return attr->mode; |
481 | } |
482 | |
483 | /* |
484 | * max6697_is_visible uses the index into the following array to determine |
485 | * if attributes should be created or not. Any change in order or content |
486 | * must be matched in max6697_is_visible. |
487 | */ |
488 | static struct attribute *max6697_attributes[] = { |
489 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
490 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
491 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
492 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
493 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
494 | &dev_attr_dummy.attr, |
495 | &dev_attr_dummy.attr, |
496 | |
497 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
498 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
499 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
500 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
501 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
502 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
503 | &sensor_dev_attr_temp2_offset.dev_attr.attr, |
504 | |
505 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
506 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
507 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, |
508 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
509 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, |
510 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
511 | &sensor_dev_attr_temp3_offset.dev_attr.attr, |
512 | |
513 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
514 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
515 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, |
516 | &sensor_dev_attr_temp4_crit.dev_attr.attr, |
517 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, |
518 | &sensor_dev_attr_temp4_fault.dev_attr.attr, |
519 | &sensor_dev_attr_temp4_offset.dev_attr.attr, |
520 | |
521 | &sensor_dev_attr_temp5_input.dev_attr.attr, |
522 | &sensor_dev_attr_temp5_max.dev_attr.attr, |
523 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, |
524 | &sensor_dev_attr_temp5_crit.dev_attr.attr, |
525 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, |
526 | &sensor_dev_attr_temp5_fault.dev_attr.attr, |
527 | &sensor_dev_attr_temp5_offset.dev_attr.attr, |
528 | |
529 | &sensor_dev_attr_temp6_input.dev_attr.attr, |
530 | &sensor_dev_attr_temp6_max.dev_attr.attr, |
531 | &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, |
532 | &sensor_dev_attr_temp6_crit.dev_attr.attr, |
533 | &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, |
534 | &sensor_dev_attr_temp6_fault.dev_attr.attr, |
535 | &sensor_dev_attr_temp6_offset.dev_attr.attr, |
536 | |
537 | &sensor_dev_attr_temp7_input.dev_attr.attr, |
538 | &sensor_dev_attr_temp7_max.dev_attr.attr, |
539 | &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, |
540 | &sensor_dev_attr_temp7_crit.dev_attr.attr, |
541 | &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, |
542 | &sensor_dev_attr_temp7_fault.dev_attr.attr, |
543 | &sensor_dev_attr_temp7_offset.dev_attr.attr, |
544 | |
545 | &sensor_dev_attr_temp8_input.dev_attr.attr, |
546 | &sensor_dev_attr_temp8_max.dev_attr.attr, |
547 | &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, |
548 | &sensor_dev_attr_temp8_crit.dev_attr.attr, |
549 | &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, |
550 | &sensor_dev_attr_temp8_fault.dev_attr.attr, |
551 | &sensor_dev_attr_temp8_offset.dev_attr.attr, |
552 | NULL |
553 | }; |
554 | |
555 | static const struct attribute_group max6697_group = { |
556 | .attrs = max6697_attributes, .is_visible = max6697_is_visible, |
557 | }; |
558 | __ATTRIBUTE_GROUPS(max6697); |
559 | |
560 | static void max6697_get_config_of(struct device_node *node, |
561 | struct max6697_platform_data *pdata) |
562 | { |
563 | int len; |
564 | const __be32 *prop; |
565 | |
566 | pdata->smbus_timeout_disable = |
567 | of_property_read_bool(np: node, propname: "smbus-timeout-disable" ); |
568 | pdata->extended_range_enable = |
569 | of_property_read_bool(np: node, propname: "extended-range-enable" ); |
570 | pdata->beta_compensation = |
571 | of_property_read_bool(np: node, propname: "beta-compensation-enable" ); |
572 | |
573 | prop = of_get_property(node, name: "alert-mask" , lenp: &len); |
574 | if (prop && len == sizeof(u32)) |
575 | pdata->alert_mask = be32_to_cpu(prop[0]); |
576 | prop = of_get_property(node, name: "over-temperature-mask" , lenp: &len); |
577 | if (prop && len == sizeof(u32)) |
578 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); |
579 | prop = of_get_property(node, name: "resistance-cancellation" , lenp: &len); |
580 | if (prop) { |
581 | if (len == sizeof(u32)) |
582 | pdata->resistance_cancellation = be32_to_cpu(prop[0]); |
583 | else |
584 | pdata->resistance_cancellation = 0xfe; |
585 | } |
586 | prop = of_get_property(node, name: "transistor-ideality" , lenp: &len); |
587 | if (prop && len == 2 * sizeof(u32)) { |
588 | pdata->ideality_mask = be32_to_cpu(prop[0]); |
589 | pdata->ideality_value = be32_to_cpu(prop[1]); |
590 | } |
591 | } |
592 | |
593 | static int max6697_init_chip(struct max6697_data *data, |
594 | struct i2c_client *client) |
595 | { |
596 | struct max6697_platform_data *pdata = dev_get_platdata(dev: &client->dev); |
597 | struct max6697_platform_data p; |
598 | const struct max6697_chip_data *chip = data->chip; |
599 | int factor = chip->channels; |
600 | int ret, reg; |
601 | |
602 | /* |
603 | * Don't touch configuration if neither platform data nor OF |
604 | * configuration was specified. If that is the case, use the |
605 | * current chip configuration. |
606 | */ |
607 | if (!pdata && !client->dev.of_node) { |
608 | reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); |
609 | if (reg < 0) |
610 | return reg; |
611 | if (data->type == max6581) { |
612 | if (reg & MAX6581_CONF_EXTENDED) |
613 | data->temp_offset = 64; |
614 | reg = i2c_smbus_read_byte_data(client, |
615 | MAX6581_REG_RESISTANCE); |
616 | if (reg < 0) |
617 | return reg; |
618 | factor += hweight8(reg); |
619 | } else { |
620 | if (reg & MAX6697_CONF_RESISTANCE) |
621 | factor++; |
622 | } |
623 | goto done; |
624 | } |
625 | |
626 | if (client->dev.of_node) { |
627 | memset(&p, 0, sizeof(p)); |
628 | max6697_get_config_of(node: client->dev.of_node, pdata: &p); |
629 | pdata = &p; |
630 | } |
631 | |
632 | reg = 0; |
633 | if (pdata->smbus_timeout_disable && |
634 | (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { |
635 | reg |= MAX6697_CONF_TIMEOUT; |
636 | } |
637 | if (pdata->extended_range_enable && |
638 | (chip->valid_conf & MAX6581_CONF_EXTENDED)) { |
639 | reg |= MAX6581_CONF_EXTENDED; |
640 | data->temp_offset = 64; |
641 | } |
642 | if (pdata->resistance_cancellation && |
643 | (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { |
644 | reg |= MAX6697_CONF_RESISTANCE; |
645 | factor++; |
646 | } |
647 | if (pdata->beta_compensation && |
648 | (chip->valid_conf & MAX6693_CONF_BETA)) { |
649 | reg |= MAX6693_CONF_BETA; |
650 | } |
651 | |
652 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, value: reg); |
653 | if (ret < 0) |
654 | return ret; |
655 | |
656 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, |
657 | MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); |
658 | if (ret < 0) |
659 | return ret; |
660 | |
661 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, |
662 | MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); |
663 | if (ret < 0) |
664 | return ret; |
665 | |
666 | if (data->type == max6581) { |
667 | factor += hweight8(pdata->resistance_cancellation >> 1); |
668 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, |
669 | value: pdata->resistance_cancellation >> 1); |
670 | if (ret < 0) |
671 | return ret; |
672 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, |
673 | value: pdata->ideality_value); |
674 | if (ret < 0) |
675 | return ret; |
676 | ret = i2c_smbus_write_byte_data(client, |
677 | MAX6581_REG_IDEALITY_SELECT, |
678 | value: pdata->ideality_mask >> 1); |
679 | if (ret < 0) |
680 | return ret; |
681 | } |
682 | done: |
683 | data->update_interval = factor * MAX6697_CONV_TIME; |
684 | return 0; |
685 | } |
686 | |
687 | static const struct i2c_device_id max6697_id[]; |
688 | |
689 | static int max6697_probe(struct i2c_client *client) |
690 | { |
691 | struct i2c_adapter *adapter = client->adapter; |
692 | struct device *dev = &client->dev; |
693 | struct max6697_data *data; |
694 | struct device *hwmon_dev; |
695 | int err; |
696 | |
697 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
698 | return -ENODEV; |
699 | |
700 | data = devm_kzalloc(dev, size: sizeof(struct max6697_data), GFP_KERNEL); |
701 | if (!data) |
702 | return -ENOMEM; |
703 | |
704 | if (client->dev.of_node) |
705 | data->type = (uintptr_t)of_device_get_match_data(dev: &client->dev); |
706 | else |
707 | data->type = i2c_match_id(id: max6697_id, client)->driver_data; |
708 | data->chip = &max6697_chip_data[data->type]; |
709 | data->client = client; |
710 | mutex_init(&data->update_lock); |
711 | |
712 | err = max6697_init_chip(data, client); |
713 | if (err) |
714 | return err; |
715 | |
716 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, name: client->name, |
717 | drvdata: data, |
718 | groups: max6697_groups); |
719 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
720 | } |
721 | |
722 | static const struct i2c_device_id max6697_id[] = { |
723 | { "max6581" , max6581 }, |
724 | { "max6602" , max6602 }, |
725 | { "max6622" , max6622 }, |
726 | { "max6636" , max6636 }, |
727 | { "max6689" , max6689 }, |
728 | { "max6693" , max6693 }, |
729 | { "max6694" , max6694 }, |
730 | { "max6697" , max6697 }, |
731 | { "max6698" , max6698 }, |
732 | { "max6699" , max6699 }, |
733 | { } |
734 | }; |
735 | MODULE_DEVICE_TABLE(i2c, max6697_id); |
736 | |
737 | static const struct of_device_id __maybe_unused max6697_of_match[] = { |
738 | { |
739 | .compatible = "maxim,max6581" , |
740 | .data = (void *)max6581 |
741 | }, |
742 | { |
743 | .compatible = "maxim,max6602" , |
744 | .data = (void *)max6602 |
745 | }, |
746 | { |
747 | .compatible = "maxim,max6622" , |
748 | .data = (void *)max6622 |
749 | }, |
750 | { |
751 | .compatible = "maxim,max6636" , |
752 | .data = (void *)max6636 |
753 | }, |
754 | { |
755 | .compatible = "maxim,max6689" , |
756 | .data = (void *)max6689 |
757 | }, |
758 | { |
759 | .compatible = "maxim,max6693" , |
760 | .data = (void *)max6693 |
761 | }, |
762 | { |
763 | .compatible = "maxim,max6694" , |
764 | .data = (void *)max6694 |
765 | }, |
766 | { |
767 | .compatible = "maxim,max6697" , |
768 | .data = (void *)max6697 |
769 | }, |
770 | { |
771 | .compatible = "maxim,max6698" , |
772 | .data = (void *)max6698 |
773 | }, |
774 | { |
775 | .compatible = "maxim,max6699" , |
776 | .data = (void *)max6699 |
777 | }, |
778 | { }, |
779 | }; |
780 | MODULE_DEVICE_TABLE(of, max6697_of_match); |
781 | |
782 | static struct i2c_driver max6697_driver = { |
783 | .driver = { |
784 | .name = "max6697" , |
785 | .of_match_table = of_match_ptr(max6697_of_match), |
786 | }, |
787 | .probe = max6697_probe, |
788 | .id_table = max6697_id, |
789 | }; |
790 | |
791 | module_i2c_driver(max6697_driver); |
792 | |
793 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>" ); |
794 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver" ); |
795 | MODULE_LICENSE("GPL" ); |
796 | |