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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
5372d2d7 GR |
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> | |
5372d2d7 GR |
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 | */ | |
016983d1 | 40 | #define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ |
5372d2d7 | 41 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) |
016983d1 | 42 | #define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) |
5372d2d7 GR |
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 | |
a686024e CL |
59 | #define MAX6581_OFFSET_MIN -31750 |
60 | #define MAX6581_OFFSET_MAX 31750 | |
5372d2d7 GR |
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 { | |
8d373552 | 74 | struct i2c_client *client; |
5372d2d7 GR |
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 | ||
a686024e CL |
176 | static inline int max6581_offset_to_millic(int val) |
177 | { | |
178 | return sign_extend32(val, 7) * 250; | |
179 | } | |
180 | ||
5372d2d7 GR |
181 | static struct max6697_data *max6697_update_device(struct device *dev) |
182 | { | |
8d373552 GR |
183 | struct max6697_data *data = dev_get_drvdata(dev); |
184 | struct i2c_client *client = data->client; | |
5372d2d7 GR |
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 | MAX6697_REG_TEMP_EXT[i]); | |
201 | if (unlikely(val < 0)) { | |
202 | ret = ERR_PTR(val); | |
203 | goto abort; | |
204 | } | |
205 | data->temp[i][MAX6697_TEMP_EXT] = val; | |
206 | } | |
207 | ||
208 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); | |
209 | if (unlikely(val < 0)) { | |
210 | ret = ERR_PTR(val); | |
211 | goto abort; | |
212 | } | |
213 | data->temp[i][MAX6697_TEMP_INPUT] = val; | |
214 | ||
215 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); | |
216 | if (unlikely(val < 0)) { | |
217 | ret = ERR_PTR(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 | MAX6697_REG_CRIT[i]); | |
225 | if (unlikely(val < 0)) { | |
226 | ret = ERR_PTR(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(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(&data->update_lock); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
740c2f2b | 251 | static ssize_t temp_input_show(struct device *dev, |
5372d2d7 GR |
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(data)) | |
259 | return PTR_ERR(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, "%d\n", temp * 125); | |
265 | } | |
266 | ||
740c2f2b GR |
267 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
268 | char *buf) | |
5372d2d7 GR |
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(data)) | |
276 | return PTR_ERR(data); | |
277 | ||
278 | temp = data->temp[nr][index]; | |
279 | temp -= data->temp_offset; | |
280 | ||
281 | return sprintf(buf, "%d\n", temp * 1000); | |
282 | } | |
283 | ||
740c2f2b | 284 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
5372d2d7 GR |
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(data)) | |
291 | return PTR_ERR(data); | |
292 | ||
293 | if (data->chip->alarm_map) | |
294 | index = data->chip->alarm_map[index]; | |
295 | ||
296 | return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); | |
297 | } | |
298 | ||
740c2f2b GR |
299 | static ssize_t temp_store(struct device *dev, |
300 | struct device_attribute *devattr, const char *buf, | |
301 | size_t count) | |
5372d2d7 GR |
302 | { |
303 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
304 | int index = to_sensor_dev_attr_2(devattr)->index; | |
8d373552 | 305 | struct max6697_data *data = dev_get_drvdata(dev); |
5372d2d7 GR |
306 | long temp; |
307 | int ret; | |
308 | ||
309 | ret = kstrtol(buf, 10, &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; | |
8d373552 | 317 | ret = i2c_smbus_write_byte_data(data->client, |
5372d2d7 GR |
318 | index == 2 ? MAX6697_REG_MAX[nr] |
319 | : MAX6697_REG_CRIT[nr], | |
320 | temp); | |
321 | mutex_unlock(&data->update_lock); | |
322 | ||
323 | return ret < 0 ? ret : count; | |
324 | } | |
325 | ||
a686024e CL |
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(buf, 10, &temp); | |
337 | if (ret < 0) | |
338 | return ret; | |
339 | ||
340 | mutex_lock(&data->update_lock); | |
341 | select = i2c_smbus_read_byte_data(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(data->client, MAX6581_REG_OFFSET_SELECT, | |
353 | 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(data->client, MAX6581_REG_OFFSET_SELECT, | |
359 | select | (1 << (index - 1))); | |
360 | if (ret < 0) | |
361 | goto abort; | |
362 | } | |
363 | ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET, val); | |
364 | ret = ret < 0 ? ret : count; | |
365 | ||
366 | abort: | |
367 | mutex_unlock(&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(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(data->client, MAX6581_REG_OFFSET); | |
384 | else | |
385 | ret = 0; | |
386 | mutex_unlock(&data->update_lock); | |
387 | return ret < 0 ? ret : sprintf(buf, "%d\n", max6581_offset_to_millic(ret)); | |
388 | } | |
389 | ||
740c2f2b GR |
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); | |
5372d2d7 | 447 | |
a686024e CL |
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 | ||
6bf44ced GR |
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 | { | |
9d2227bb | 462 | struct device *dev = kobj_to_dev(kobj); |
8d373552 | 463 | struct max6697_data *data = dev_get_drvdata(dev); |
6bf44ced | 464 | const struct max6697_chip_data *chip = data->chip; |
a686024e CL |
465 | int channel = index / 7; /* channel number */ |
466 | int nr = index % 7; /* attribute index within channel */ | |
6bf44ced GR |
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; | |
a686024e CL |
475 | /* offset reg is only supported on max6581 remote channels */ |
476 | if (nr == 6) | |
477 | if (data->type != max6581 || channel == 0) | |
478 | return 0; | |
6bf44ced GR |
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, | |
a686024e | 495 | &dev_attr_dummy.attr, |
6bf44ced GR |
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, | |
a686024e | 503 | &sensor_dev_attr_temp2_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 511 | &sensor_dev_attr_temp3_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 519 | &sensor_dev_attr_temp4_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 527 | &sensor_dev_attr_temp5_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 535 | &sensor_dev_attr_temp6_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 543 | &sensor_dev_attr_temp7_offset.dev_attr.attr, |
6bf44ced GR |
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, | |
a686024e | 551 | &sensor_dev_attr_temp8_offset.dev_attr.attr, |
6bf44ced | 552 | NULL |
5372d2d7 GR |
553 | }; |
554 | ||
6bf44ced GR |
555 | static const struct attribute_group max6697_group = { |
556 | .attrs = max6697_attributes, .is_visible = max6697_is_visible, | |
5372d2d7 | 557 | }; |
8d373552 | 558 | __ATTRIBUTE_GROUPS(max6697); |
5372d2d7 GR |
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 | ||
8de2dcc9 AL |
566 | pdata->smbus_timeout_disable = |
567 | of_property_read_bool(node, "smbus-timeout-disable"); | |
568 | pdata->extended_range_enable = | |
569 | of_property_read_bool(node, "extended-range-enable"); | |
570 | pdata->beta_compensation = | |
571 | of_property_read_bool(node, "beta-compensation-enable"); | |
572 | ||
5372d2d7 GR |
573 | prop = of_get_property(node, "alert-mask", &len); |
574 | if (prop && len == sizeof(u32)) | |
575 | pdata->alert_mask = be32_to_cpu(prop[0]); | |
576 | prop = of_get_property(node, "over-temperature-mask", &len); | |
577 | if (prop && len == sizeof(u32)) | |
578 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); | |
579 | prop = of_get_property(node, "resistance-cancellation", &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, "transistor-ideality", &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 | ||
8d373552 GR |
593 | static int max6697_init_chip(struct max6697_data *data, |
594 | struct i2c_client *client) | |
5372d2d7 | 595 | { |
5372d2d7 GR |
596 | struct max6697_platform_data *pdata = dev_get_platdata(&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(client->dev.of_node, &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, reg); | |
653 | if (ret < 0) | |
654 | return ret; | |
655 | ||
656 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, | |
016983d1 | 657 | MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); |
5372d2d7 GR |
658 | if (ret < 0) |
659 | return ret; | |
660 | ||
661 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, | |
016983d1 | 662 | MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); |
5372d2d7 GR |
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 | pdata->resistance_cancellation >> 1); | |
670 | if (ret < 0) | |
671 | return ret; | |
672 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, | |
5c52add1 | 673 | pdata->ideality_value); |
5372d2d7 GR |
674 | if (ret < 0) |
675 | return ret; | |
676 | ret = i2c_smbus_write_byte_data(client, | |
677 | MAX6581_REG_IDEALITY_SELECT, | |
5c52add1 | 678 | pdata->ideality_mask >> 1); |
5372d2d7 GR |
679 | if (ret < 0) |
680 | return ret; | |
681 | } | |
682 | done: | |
683 | data->update_interval = factor * MAX6697_CONV_TIME; | |
684 | return 0; | |
685 | } | |
686 | ||
67487038 SK |
687 | static const struct i2c_device_id max6697_id[]; |
688 | ||
689 | static int max6697_probe(struct i2c_client *client) | |
5372d2d7 GR |
690 | { |
691 | struct i2c_adapter *adapter = client->adapter; | |
692 | struct device *dev = &client->dev; | |
693 | struct max6697_data *data; | |
8d373552 | 694 | struct device *hwmon_dev; |
6bf44ced | 695 | int err; |
5372d2d7 GR |
696 | |
697 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
698 | return -ENODEV; | |
699 | ||
700 | data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); | |
701 | if (!data) | |
702 | return -ENOMEM; | |
703 | ||
9e427083 | 704 | if (client->dev.of_node) |
d6f09471 | 705 | data->type = (uintptr_t)of_device_get_match_data(&client->dev); |
9e427083 | 706 | else |
67487038 | 707 | data->type = i2c_match_id(max6697_id, client)->driver_data; |
5372d2d7 | 708 | data->chip = &max6697_chip_data[data->type]; |
8d373552 | 709 | data->client = client; |
5372d2d7 GR |
710 | mutex_init(&data->update_lock); |
711 | ||
8d373552 | 712 | err = max6697_init_chip(data, client); |
5372d2d7 GR |
713 | if (err) |
714 | return err; | |
715 | ||
8d373552 GR |
716 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
717 | data, | |
718 | max6697_groups); | |
4109a716 | 719 | return PTR_ERR_OR_ZERO(hwmon_dev); |
5372d2d7 GR |
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 | ||
f198a869 | 737 | static const struct of_device_id __maybe_unused max6697_of_match[] = { |
9e427083 JMC |
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 | ||
5372d2d7 GR |
782 | static struct i2c_driver max6697_driver = { |
783 | .class = I2C_CLASS_HWMON, | |
784 | .driver = { | |
785 | .name = "max6697", | |
9e427083 | 786 | .of_match_table = of_match_ptr(max6697_of_match), |
5372d2d7 | 787 | }, |
1975d167 | 788 | .probe = max6697_probe, |
5372d2d7 GR |
789 | .id_table = max6697_id, |
790 | }; | |
791 | ||
792 | module_i2c_driver(max6697_driver); | |
793 | ||
794 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
795 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); | |
796 | MODULE_LICENSE("GPL"); |