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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> | |
9e427083 | 18 | #include <linux/of_device.h> |
5372d2d7 GR |
19 | #include <linux/of.h> |
20 | ||
21 | #include <linux/platform_data/max6697.h> | |
22 | ||
23 | enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, | |
24 | max6697, max6698, max6699 }; | |
25 | ||
26 | /* Report local sensor as temp1 */ | |
27 | ||
28 | static const u8 MAX6697_REG_TEMP[] = { | |
29 | 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; | |
30 | static const u8 MAX6697_REG_TEMP_EXT[] = { | |
31 | 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; | |
32 | static const u8 MAX6697_REG_MAX[] = { | |
33 | 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; | |
34 | static const u8 MAX6697_REG_CRIT[] = { | |
35 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; | |
36 | ||
37 | /* | |
38 | * Map device tree / platform data register bit map to chip bit map. | |
39 | * Applies to alert register and over-temperature register. | |
40 | */ | |
016983d1 | 41 | #define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ |
5372d2d7 | 42 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) |
016983d1 | 43 | #define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) |
5372d2d7 GR |
44 | |
45 | #define MAX6697_REG_STAT(n) (0x44 + (n)) | |
46 | ||
47 | #define MAX6697_REG_CONFIG 0x41 | |
48 | #define MAX6581_CONF_EXTENDED (1 << 1) | |
49 | #define MAX6693_CONF_BETA (1 << 2) | |
50 | #define MAX6697_CONF_RESISTANCE (1 << 3) | |
51 | #define MAX6697_CONF_TIMEOUT (1 << 5) | |
52 | #define MAX6697_REG_ALERT_MASK 0x42 | |
53 | #define MAX6697_REG_OVERT_MASK 0x43 | |
54 | ||
55 | #define MAX6581_REG_RESISTANCE 0x4a | |
56 | #define MAX6581_REG_IDEALITY 0x4b | |
57 | #define MAX6581_REG_IDEALITY_SELECT 0x4c | |
58 | #define MAX6581_REG_OFFSET 0x4d | |
59 | #define MAX6581_REG_OFFSET_SELECT 0x4e | |
a686024e CL |
60 | #define MAX6581_OFFSET_MIN -31750 |
61 | #define MAX6581_OFFSET_MAX 31750 | |
5372d2d7 GR |
62 | |
63 | #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ | |
64 | ||
65 | struct max6697_chip_data { | |
66 | int channels; | |
67 | u32 have_ext; | |
68 | u32 have_crit; | |
69 | u32 have_fault; | |
70 | u8 valid_conf; | |
71 | const u8 *alarm_map; | |
72 | }; | |
73 | ||
74 | struct max6697_data { | |
8d373552 | 75 | struct i2c_client *client; |
5372d2d7 GR |
76 | |
77 | enum chips type; | |
78 | const struct max6697_chip_data *chip; | |
79 | ||
80 | int update_interval; /* in milli-seconds */ | |
81 | int temp_offset; /* in degrees C */ | |
82 | ||
83 | struct mutex update_lock; | |
84 | unsigned long last_updated; /* In jiffies */ | |
85 | bool valid; /* true if following fields are valid */ | |
86 | ||
87 | /* 1x local and up to 7x remote */ | |
88 | u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ | |
89 | #define MAX6697_TEMP_INPUT 0 | |
90 | #define MAX6697_TEMP_EXT 1 | |
91 | #define MAX6697_TEMP_MAX 2 | |
92 | #define MAX6697_TEMP_CRIT 3 | |
93 | u32 alarms; | |
94 | }; | |
95 | ||
96 | /* Diode fault status bits on MAX6581 are right shifted by one bit */ | |
97 | static const u8 max6581_alarm_map[] = { | |
98 | 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, | |
99 | 16, 17, 18, 19, 20, 21, 22, 23 }; | |
100 | ||
101 | static const struct max6697_chip_data max6697_chip_data[] = { | |
102 | [max6581] = { | |
103 | .channels = 8, | |
104 | .have_crit = 0xff, | |
105 | .have_ext = 0x7f, | |
106 | .have_fault = 0xfe, | |
107 | .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, | |
108 | .alarm_map = max6581_alarm_map, | |
109 | }, | |
110 | [max6602] = { | |
111 | .channels = 5, | |
112 | .have_crit = 0x12, | |
113 | .have_ext = 0x02, | |
114 | .have_fault = 0x1e, | |
115 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
116 | }, | |
117 | [max6622] = { | |
118 | .channels = 5, | |
119 | .have_crit = 0x12, | |
120 | .have_ext = 0x02, | |
121 | .have_fault = 0x1e, | |
122 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
123 | }, | |
124 | [max6636] = { | |
125 | .channels = 7, | |
126 | .have_crit = 0x72, | |
127 | .have_ext = 0x02, | |
128 | .have_fault = 0x7e, | |
129 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
130 | }, | |
131 | [max6689] = { | |
132 | .channels = 7, | |
133 | .have_crit = 0x72, | |
134 | .have_ext = 0x02, | |
135 | .have_fault = 0x7e, | |
136 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
137 | }, | |
138 | [max6693] = { | |
139 | .channels = 7, | |
140 | .have_crit = 0x72, | |
141 | .have_ext = 0x02, | |
142 | .have_fault = 0x7e, | |
143 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
144 | MAX6697_CONF_TIMEOUT, | |
145 | }, | |
146 | [max6694] = { | |
147 | .channels = 5, | |
148 | .have_crit = 0x12, | |
149 | .have_ext = 0x02, | |
150 | .have_fault = 0x1e, | |
151 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
152 | MAX6697_CONF_TIMEOUT, | |
153 | }, | |
154 | [max6697] = { | |
155 | .channels = 7, | |
156 | .have_crit = 0x72, | |
157 | .have_ext = 0x02, | |
158 | .have_fault = 0x7e, | |
159 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
160 | }, | |
161 | [max6698] = { | |
162 | .channels = 7, | |
163 | .have_crit = 0x72, | |
164 | .have_ext = 0x02, | |
165 | .have_fault = 0x0e, | |
166 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
167 | }, | |
168 | [max6699] = { | |
169 | .channels = 5, | |
170 | .have_crit = 0x12, | |
171 | .have_ext = 0x02, | |
172 | .have_fault = 0x1e, | |
173 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
174 | }, | |
175 | }; | |
176 | ||
a686024e CL |
177 | static inline int max6581_offset_to_millic(int val) |
178 | { | |
179 | return sign_extend32(val, 7) * 250; | |
180 | } | |
181 | ||
5372d2d7 GR |
182 | static struct max6697_data *max6697_update_device(struct device *dev) |
183 | { | |
8d373552 GR |
184 | struct max6697_data *data = dev_get_drvdata(dev); |
185 | struct i2c_client *client = data->client; | |
5372d2d7 GR |
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 | ||
740c2f2b | 252 | static ssize_t temp_input_show(struct device *dev, |
5372d2d7 GR |
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 | ||
740c2f2b GR |
268 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
269 | char *buf) | |
5372d2d7 GR |
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 | ||
740c2f2b | 285 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
5372d2d7 GR |
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 | ||
740c2f2b GR |
300 | static ssize_t temp_store(struct device *dev, |
301 | struct device_attribute *devattr, const char *buf, | |
302 | size_t count) | |
5372d2d7 GR |
303 | { |
304 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
305 | int index = to_sensor_dev_attr_2(devattr)->index; | |
8d373552 | 306 | struct max6697_data *data = dev_get_drvdata(dev); |
5372d2d7 GR |
307 | long temp; |
308 | int ret; | |
309 | ||
310 | ret = kstrtol(buf, 10, &temp); | |
311 | if (ret < 0) | |
312 | return ret; | |
313 | ||
314 | mutex_lock(&data->update_lock); | |
315 | temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; | |
316 | temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); | |
317 | data->temp[nr][index] = temp; | |
8d373552 | 318 | ret = i2c_smbus_write_byte_data(data->client, |
5372d2d7 GR |
319 | index == 2 ? MAX6697_REG_MAX[nr] |
320 | : MAX6697_REG_CRIT[nr], | |
321 | temp); | |
322 | mutex_unlock(&data->update_lock); | |
323 | ||
324 | return ret < 0 ? ret : count; | |
325 | } | |
326 | ||
a686024e CL |
327 | static ssize_t offset_store(struct device *dev, struct device_attribute *devattr, const char *buf, |
328 | size_t count) | |
329 | { | |
330 | int val, ret, index, select; | |
331 | struct max6697_data *data; | |
332 | bool channel_enabled; | |
333 | long temp; | |
334 | ||
335 | index = to_sensor_dev_attr(devattr)->index; | |
336 | data = dev_get_drvdata(dev); | |
337 | ret = kstrtol(buf, 10, &temp); | |
338 | if (ret < 0) | |
339 | return ret; | |
340 | ||
341 | mutex_lock(&data->update_lock); | |
342 | select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); | |
343 | if (select < 0) { | |
344 | ret = select; | |
345 | goto abort; | |
346 | } | |
347 | channel_enabled = (select & (1 << (index - 1))); | |
348 | temp = clamp_val(temp, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX); | |
349 | val = DIV_ROUND_CLOSEST(temp, 250); | |
350 | /* disable the offset for channel if the new offset is 0 */ | |
351 | if (val == 0) { | |
352 | if (channel_enabled) | |
353 | ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, | |
354 | select & ~(1 << (index - 1))); | |
355 | ret = ret < 0 ? ret : count; | |
356 | goto abort; | |
357 | } | |
358 | if (!channel_enabled) { | |
359 | ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, | |
360 | select | (1 << (index - 1))); | |
361 | if (ret < 0) | |
362 | goto abort; | |
363 | } | |
364 | ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET, val); | |
365 | ret = ret < 0 ? ret : count; | |
366 | ||
367 | abort: | |
368 | mutex_unlock(&data->update_lock); | |
369 | return ret; | |
370 | } | |
371 | ||
372 | static ssize_t offset_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
373 | { | |
374 | struct max6697_data *data; | |
375 | int select, ret, index; | |
376 | ||
377 | index = to_sensor_dev_attr(devattr)->index; | |
378 | data = dev_get_drvdata(dev); | |
379 | mutex_lock(&data->update_lock); | |
380 | select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); | |
381 | if (select < 0) | |
382 | ret = select; | |
383 | else if (select & (1 << (index - 1))) | |
384 | ret = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET); | |
385 | else | |
386 | ret = 0; | |
387 | mutex_unlock(&data->update_lock); | |
388 | return ret < 0 ? ret : sprintf(buf, "%d\n", max6581_offset_to_millic(ret)); | |
389 | } | |
390 | ||
740c2f2b GR |
391 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); |
392 | static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); | |
393 | static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); | |
394 | ||
395 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); | |
396 | static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); | |
397 | static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); | |
398 | ||
399 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); | |
400 | static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); | |
401 | static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); | |
402 | ||
403 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); | |
404 | static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); | |
405 | static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); | |
406 | ||
407 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); | |
408 | static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); | |
409 | static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); | |
410 | ||
411 | static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); | |
412 | static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); | |
413 | static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); | |
414 | ||
415 | static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); | |
416 | static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); | |
417 | static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); | |
418 | ||
419 | static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); | |
420 | static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); | |
421 | static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); | |
422 | ||
423 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); | |
424 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); | |
425 | static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); | |
426 | static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); | |
427 | static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); | |
428 | static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); | |
429 | static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); | |
430 | static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); | |
431 | ||
432 | static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); | |
433 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); | |
434 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); | |
435 | static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); | |
436 | static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); | |
437 | static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); | |
438 | static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); | |
439 | static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); | |
440 | ||
441 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); | |
442 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); | |
443 | static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); | |
444 | static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); | |
445 | static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); | |
446 | static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); | |
447 | static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); | |
5372d2d7 | 448 | |
a686024e CL |
449 | /* There is no offset for local temperature so starting from temp2 */ |
450 | static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 1); | |
451 | static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 2); | |
452 | static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 3); | |
453 | static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 4); | |
454 | static SENSOR_DEVICE_ATTR_RW(temp6_offset, offset, 5); | |
455 | static SENSOR_DEVICE_ATTR_RW(temp7_offset, offset, 6); | |
456 | static SENSOR_DEVICE_ATTR_RW(temp8_offset, offset, 7); | |
457 | ||
6bf44ced GR |
458 | static DEVICE_ATTR(dummy, 0, NULL, NULL); |
459 | ||
460 | static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, | |
461 | int index) | |
462 | { | |
463 | struct device *dev = container_of(kobj, struct device, kobj); | |
8d373552 | 464 | struct max6697_data *data = dev_get_drvdata(dev); |
6bf44ced | 465 | const struct max6697_chip_data *chip = data->chip; |
a686024e CL |
466 | int channel = index / 7; /* channel number */ |
467 | int nr = index % 7; /* attribute index within channel */ | |
6bf44ced GR |
468 | |
469 | if (channel >= chip->channels) | |
470 | return 0; | |
471 | ||
472 | if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) | |
473 | return 0; | |
474 | if (nr == 5 && !(chip->have_fault & (1 << channel))) | |
475 | return 0; | |
a686024e CL |
476 | /* offset reg is only supported on max6581 remote channels */ |
477 | if (nr == 6) | |
478 | if (data->type != max6581 || channel == 0) | |
479 | return 0; | |
6bf44ced GR |
480 | |
481 | return attr->mode; | |
482 | } | |
483 | ||
484 | /* | |
485 | * max6697_is_visible uses the index into the following array to determine | |
486 | * if attributes should be created or not. Any change in order or content | |
487 | * must be matched in max6697_is_visible. | |
488 | */ | |
489 | static struct attribute *max6697_attributes[] = { | |
490 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
491 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
492 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
493 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
494 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
495 | &dev_attr_dummy.attr, | |
a686024e | 496 | &dev_attr_dummy.attr, |
6bf44ced GR |
497 | |
498 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
499 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
500 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
501 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
502 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
503 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
a686024e | 504 | &sensor_dev_attr_temp2_offset.dev_attr.attr, |
6bf44ced GR |
505 | |
506 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
507 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
508 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
509 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
510 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
511 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
a686024e | 512 | &sensor_dev_attr_temp3_offset.dev_attr.attr, |
6bf44ced GR |
513 | |
514 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
515 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
516 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
517 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
518 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
519 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
a686024e | 520 | &sensor_dev_attr_temp4_offset.dev_attr.attr, |
6bf44ced GR |
521 | |
522 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
523 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
524 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
525 | &sensor_dev_attr_temp5_crit.dev_attr.attr, | |
526 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, | |
527 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
a686024e | 528 | &sensor_dev_attr_temp5_offset.dev_attr.attr, |
6bf44ced GR |
529 | |
530 | &sensor_dev_attr_temp6_input.dev_attr.attr, | |
531 | &sensor_dev_attr_temp6_max.dev_attr.attr, | |
532 | &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, | |
533 | &sensor_dev_attr_temp6_crit.dev_attr.attr, | |
534 | &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, | |
535 | &sensor_dev_attr_temp6_fault.dev_attr.attr, | |
a686024e | 536 | &sensor_dev_attr_temp6_offset.dev_attr.attr, |
6bf44ced GR |
537 | |
538 | &sensor_dev_attr_temp7_input.dev_attr.attr, | |
539 | &sensor_dev_attr_temp7_max.dev_attr.attr, | |
540 | &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, | |
541 | &sensor_dev_attr_temp7_crit.dev_attr.attr, | |
542 | &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, | |
543 | &sensor_dev_attr_temp7_fault.dev_attr.attr, | |
a686024e | 544 | &sensor_dev_attr_temp7_offset.dev_attr.attr, |
6bf44ced GR |
545 | |
546 | &sensor_dev_attr_temp8_input.dev_attr.attr, | |
547 | &sensor_dev_attr_temp8_max.dev_attr.attr, | |
548 | &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, | |
549 | &sensor_dev_attr_temp8_crit.dev_attr.attr, | |
550 | &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, | |
551 | &sensor_dev_attr_temp8_fault.dev_attr.attr, | |
a686024e | 552 | &sensor_dev_attr_temp8_offset.dev_attr.attr, |
6bf44ced | 553 | NULL |
5372d2d7 GR |
554 | }; |
555 | ||
6bf44ced GR |
556 | static const struct attribute_group max6697_group = { |
557 | .attrs = max6697_attributes, .is_visible = max6697_is_visible, | |
5372d2d7 | 558 | }; |
8d373552 | 559 | __ATTRIBUTE_GROUPS(max6697); |
5372d2d7 GR |
560 | |
561 | static void max6697_get_config_of(struct device_node *node, | |
562 | struct max6697_platform_data *pdata) | |
563 | { | |
564 | int len; | |
565 | const __be32 *prop; | |
566 | ||
8de2dcc9 AL |
567 | pdata->smbus_timeout_disable = |
568 | of_property_read_bool(node, "smbus-timeout-disable"); | |
569 | pdata->extended_range_enable = | |
570 | of_property_read_bool(node, "extended-range-enable"); | |
571 | pdata->beta_compensation = | |
572 | of_property_read_bool(node, "beta-compensation-enable"); | |
573 | ||
5372d2d7 GR |
574 | prop = of_get_property(node, "alert-mask", &len); |
575 | if (prop && len == sizeof(u32)) | |
576 | pdata->alert_mask = be32_to_cpu(prop[0]); | |
577 | prop = of_get_property(node, "over-temperature-mask", &len); | |
578 | if (prop && len == sizeof(u32)) | |
579 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); | |
580 | prop = of_get_property(node, "resistance-cancellation", &len); | |
581 | if (prop) { | |
582 | if (len == sizeof(u32)) | |
583 | pdata->resistance_cancellation = be32_to_cpu(prop[0]); | |
584 | else | |
585 | pdata->resistance_cancellation = 0xfe; | |
586 | } | |
587 | prop = of_get_property(node, "transistor-ideality", &len); | |
588 | if (prop && len == 2 * sizeof(u32)) { | |
589 | pdata->ideality_mask = be32_to_cpu(prop[0]); | |
590 | pdata->ideality_value = be32_to_cpu(prop[1]); | |
591 | } | |
592 | } | |
593 | ||
8d373552 GR |
594 | static int max6697_init_chip(struct max6697_data *data, |
595 | struct i2c_client *client) | |
5372d2d7 | 596 | { |
5372d2d7 GR |
597 | struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); |
598 | struct max6697_platform_data p; | |
599 | const struct max6697_chip_data *chip = data->chip; | |
600 | int factor = chip->channels; | |
601 | int ret, reg; | |
602 | ||
603 | /* | |
604 | * Don't touch configuration if neither platform data nor OF | |
605 | * configuration was specified. If that is the case, use the | |
606 | * current chip configuration. | |
607 | */ | |
608 | if (!pdata && !client->dev.of_node) { | |
609 | reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); | |
610 | if (reg < 0) | |
611 | return reg; | |
612 | if (data->type == max6581) { | |
613 | if (reg & MAX6581_CONF_EXTENDED) | |
614 | data->temp_offset = 64; | |
615 | reg = i2c_smbus_read_byte_data(client, | |
616 | MAX6581_REG_RESISTANCE); | |
617 | if (reg < 0) | |
618 | return reg; | |
619 | factor += hweight8(reg); | |
620 | } else { | |
621 | if (reg & MAX6697_CONF_RESISTANCE) | |
622 | factor++; | |
623 | } | |
624 | goto done; | |
625 | } | |
626 | ||
627 | if (client->dev.of_node) { | |
628 | memset(&p, 0, sizeof(p)); | |
629 | max6697_get_config_of(client->dev.of_node, &p); | |
630 | pdata = &p; | |
631 | } | |
632 | ||
633 | reg = 0; | |
634 | if (pdata->smbus_timeout_disable && | |
635 | (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { | |
636 | reg |= MAX6697_CONF_TIMEOUT; | |
637 | } | |
638 | if (pdata->extended_range_enable && | |
639 | (chip->valid_conf & MAX6581_CONF_EXTENDED)) { | |
640 | reg |= MAX6581_CONF_EXTENDED; | |
641 | data->temp_offset = 64; | |
642 | } | |
643 | if (pdata->resistance_cancellation && | |
644 | (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { | |
645 | reg |= MAX6697_CONF_RESISTANCE; | |
646 | factor++; | |
647 | } | |
648 | if (pdata->beta_compensation && | |
649 | (chip->valid_conf & MAX6693_CONF_BETA)) { | |
650 | reg |= MAX6693_CONF_BETA; | |
651 | } | |
652 | ||
653 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); | |
654 | if (ret < 0) | |
655 | return ret; | |
656 | ||
657 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, | |
016983d1 | 658 | MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); |
5372d2d7 GR |
659 | if (ret < 0) |
660 | return ret; | |
661 | ||
662 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, | |
016983d1 | 663 | MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); |
5372d2d7 GR |
664 | if (ret < 0) |
665 | return ret; | |
666 | ||
667 | if (data->type == max6581) { | |
668 | factor += hweight8(pdata->resistance_cancellation >> 1); | |
669 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, | |
670 | pdata->resistance_cancellation >> 1); | |
671 | if (ret < 0) | |
672 | return ret; | |
673 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, | |
5c52add1 | 674 | pdata->ideality_value); |
5372d2d7 GR |
675 | if (ret < 0) |
676 | return ret; | |
677 | ret = i2c_smbus_write_byte_data(client, | |
678 | MAX6581_REG_IDEALITY_SELECT, | |
5c52add1 | 679 | pdata->ideality_mask >> 1); |
5372d2d7 GR |
680 | if (ret < 0) |
681 | return ret; | |
682 | } | |
683 | done: | |
684 | data->update_interval = factor * MAX6697_CONV_TIME; | |
685 | return 0; | |
686 | } | |
687 | ||
67487038 SK |
688 | static const struct i2c_device_id max6697_id[]; |
689 | ||
690 | static int max6697_probe(struct i2c_client *client) | |
5372d2d7 GR |
691 | { |
692 | struct i2c_adapter *adapter = client->adapter; | |
693 | struct device *dev = &client->dev; | |
694 | struct max6697_data *data; | |
8d373552 | 695 | struct device *hwmon_dev; |
6bf44ced | 696 | int err; |
5372d2d7 GR |
697 | |
698 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
699 | return -ENODEV; | |
700 | ||
701 | data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); | |
702 | if (!data) | |
703 | return -ENOMEM; | |
704 | ||
9e427083 JMC |
705 | if (client->dev.of_node) |
706 | data->type = (enum chips)of_device_get_match_data(&client->dev); | |
707 | else | |
67487038 | 708 | data->type = i2c_match_id(max6697_id, client)->driver_data; |
5372d2d7 | 709 | data->chip = &max6697_chip_data[data->type]; |
8d373552 | 710 | data->client = client; |
5372d2d7 GR |
711 | mutex_init(&data->update_lock); |
712 | ||
8d373552 | 713 | err = max6697_init_chip(data, client); |
5372d2d7 GR |
714 | if (err) |
715 | return err; | |
716 | ||
8d373552 GR |
717 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
718 | data, | |
719 | max6697_groups); | |
4109a716 | 720 | return PTR_ERR_OR_ZERO(hwmon_dev); |
5372d2d7 GR |
721 | } |
722 | ||
723 | static const struct i2c_device_id max6697_id[] = { | |
724 | { "max6581", max6581 }, | |
725 | { "max6602", max6602 }, | |
726 | { "max6622", max6622 }, | |
727 | { "max6636", max6636 }, | |
728 | { "max6689", max6689 }, | |
729 | { "max6693", max6693 }, | |
730 | { "max6694", max6694 }, | |
731 | { "max6697", max6697 }, | |
732 | { "max6698", max6698 }, | |
733 | { "max6699", max6699 }, | |
734 | { } | |
735 | }; | |
736 | MODULE_DEVICE_TABLE(i2c, max6697_id); | |
737 | ||
f198a869 | 738 | static const struct of_device_id __maybe_unused max6697_of_match[] = { |
9e427083 JMC |
739 | { |
740 | .compatible = "maxim,max6581", | |
741 | .data = (void *)max6581 | |
742 | }, | |
743 | { | |
744 | .compatible = "maxim,max6602", | |
745 | .data = (void *)max6602 | |
746 | }, | |
747 | { | |
748 | .compatible = "maxim,max6622", | |
749 | .data = (void *)max6622 | |
750 | }, | |
751 | { | |
752 | .compatible = "maxim,max6636", | |
753 | .data = (void *)max6636 | |
754 | }, | |
755 | { | |
756 | .compatible = "maxim,max6689", | |
757 | .data = (void *)max6689 | |
758 | }, | |
759 | { | |
760 | .compatible = "maxim,max6693", | |
761 | .data = (void *)max6693 | |
762 | }, | |
763 | { | |
764 | .compatible = "maxim,max6694", | |
765 | .data = (void *)max6694 | |
766 | }, | |
767 | { | |
768 | .compatible = "maxim,max6697", | |
769 | .data = (void *)max6697 | |
770 | }, | |
771 | { | |
772 | .compatible = "maxim,max6698", | |
773 | .data = (void *)max6698 | |
774 | }, | |
775 | { | |
776 | .compatible = "maxim,max6699", | |
777 | .data = (void *)max6699 | |
778 | }, | |
779 | { }, | |
780 | }; | |
781 | MODULE_DEVICE_TABLE(of, max6697_of_match); | |
782 | ||
5372d2d7 GR |
783 | static struct i2c_driver max6697_driver = { |
784 | .class = I2C_CLASS_HWMON, | |
785 | .driver = { | |
786 | .name = "max6697", | |
9e427083 | 787 | .of_match_table = of_match_ptr(max6697_of_match), |
5372d2d7 | 788 | }, |
67487038 | 789 | .probe_new = max6697_probe, |
5372d2d7 GR |
790 | .id_table = max6697_id, |
791 | }; | |
792 | ||
793 | module_i2c_driver(max6697_driver); | |
794 | ||
795 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
796 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); | |
797 | MODULE_LICENSE("GPL"); |