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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 | */ | |
41 | #define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ | |
42 | (((reg) & 0x01) << 6) | ((reg) & 0x80)) | |
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 | ||
60 | #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ | |
61 | ||
62 | struct max6697_chip_data { | |
63 | int channels; | |
64 | u32 have_ext; | |
65 | u32 have_crit; | |
66 | u32 have_fault; | |
67 | u8 valid_conf; | |
68 | const u8 *alarm_map; | |
69 | }; | |
70 | ||
71 | struct max6697_data { | |
8d373552 | 72 | struct i2c_client *client; |
5372d2d7 GR |
73 | |
74 | enum chips type; | |
75 | const struct max6697_chip_data *chip; | |
76 | ||
77 | int update_interval; /* in milli-seconds */ | |
78 | int temp_offset; /* in degrees C */ | |
79 | ||
80 | struct mutex update_lock; | |
81 | unsigned long last_updated; /* In jiffies */ | |
82 | bool valid; /* true if following fields are valid */ | |
83 | ||
84 | /* 1x local and up to 7x remote */ | |
85 | u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ | |
86 | #define MAX6697_TEMP_INPUT 0 | |
87 | #define MAX6697_TEMP_EXT 1 | |
88 | #define MAX6697_TEMP_MAX 2 | |
89 | #define MAX6697_TEMP_CRIT 3 | |
90 | u32 alarms; | |
91 | }; | |
92 | ||
93 | /* Diode fault status bits on MAX6581 are right shifted by one bit */ | |
94 | static const u8 max6581_alarm_map[] = { | |
95 | 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, | |
96 | 16, 17, 18, 19, 20, 21, 22, 23 }; | |
97 | ||
98 | static const struct max6697_chip_data max6697_chip_data[] = { | |
99 | [max6581] = { | |
100 | .channels = 8, | |
101 | .have_crit = 0xff, | |
102 | .have_ext = 0x7f, | |
103 | .have_fault = 0xfe, | |
104 | .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, | |
105 | .alarm_map = max6581_alarm_map, | |
106 | }, | |
107 | [max6602] = { | |
108 | .channels = 5, | |
109 | .have_crit = 0x12, | |
110 | .have_ext = 0x02, | |
111 | .have_fault = 0x1e, | |
112 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
113 | }, | |
114 | [max6622] = { | |
115 | .channels = 5, | |
116 | .have_crit = 0x12, | |
117 | .have_ext = 0x02, | |
118 | .have_fault = 0x1e, | |
119 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
120 | }, | |
121 | [max6636] = { | |
122 | .channels = 7, | |
123 | .have_crit = 0x72, | |
124 | .have_ext = 0x02, | |
125 | .have_fault = 0x7e, | |
126 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
127 | }, | |
128 | [max6689] = { | |
129 | .channels = 7, | |
130 | .have_crit = 0x72, | |
131 | .have_ext = 0x02, | |
132 | .have_fault = 0x7e, | |
133 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
134 | }, | |
135 | [max6693] = { | |
136 | .channels = 7, | |
137 | .have_crit = 0x72, | |
138 | .have_ext = 0x02, | |
139 | .have_fault = 0x7e, | |
140 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
141 | MAX6697_CONF_TIMEOUT, | |
142 | }, | |
143 | [max6694] = { | |
144 | .channels = 5, | |
145 | .have_crit = 0x12, | |
146 | .have_ext = 0x02, | |
147 | .have_fault = 0x1e, | |
148 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | | |
149 | MAX6697_CONF_TIMEOUT, | |
150 | }, | |
151 | [max6697] = { | |
152 | .channels = 7, | |
153 | .have_crit = 0x72, | |
154 | .have_ext = 0x02, | |
155 | .have_fault = 0x7e, | |
156 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
157 | }, | |
158 | [max6698] = { | |
159 | .channels = 7, | |
160 | .have_crit = 0x72, | |
161 | .have_ext = 0x02, | |
162 | .have_fault = 0x0e, | |
163 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
164 | }, | |
165 | [max6699] = { | |
166 | .channels = 5, | |
167 | .have_crit = 0x12, | |
168 | .have_ext = 0x02, | |
169 | .have_fault = 0x1e, | |
170 | .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, | |
171 | }, | |
172 | }; | |
173 | ||
174 | static struct max6697_data *max6697_update_device(struct device *dev) | |
175 | { | |
8d373552 GR |
176 | struct max6697_data *data = dev_get_drvdata(dev); |
177 | struct i2c_client *client = data->client; | |
5372d2d7 GR |
178 | struct max6697_data *ret = data; |
179 | int val; | |
180 | int i; | |
181 | u32 alarms; | |
182 | ||
183 | mutex_lock(&data->update_lock); | |
184 | ||
185 | if (data->valid && | |
186 | !time_after(jiffies, data->last_updated | |
187 | + msecs_to_jiffies(data->update_interval))) | |
188 | goto abort; | |
189 | ||
190 | for (i = 0; i < data->chip->channels; i++) { | |
191 | if (data->chip->have_ext & (1 << i)) { | |
192 | val = i2c_smbus_read_byte_data(client, | |
193 | MAX6697_REG_TEMP_EXT[i]); | |
194 | if (unlikely(val < 0)) { | |
195 | ret = ERR_PTR(val); | |
196 | goto abort; | |
197 | } | |
198 | data->temp[i][MAX6697_TEMP_EXT] = val; | |
199 | } | |
200 | ||
201 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); | |
202 | if (unlikely(val < 0)) { | |
203 | ret = ERR_PTR(val); | |
204 | goto abort; | |
205 | } | |
206 | data->temp[i][MAX6697_TEMP_INPUT] = val; | |
207 | ||
208 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); | |
209 | if (unlikely(val < 0)) { | |
210 | ret = ERR_PTR(val); | |
211 | goto abort; | |
212 | } | |
213 | data->temp[i][MAX6697_TEMP_MAX] = val; | |
214 | ||
215 | if (data->chip->have_crit & (1 << i)) { | |
216 | val = i2c_smbus_read_byte_data(client, | |
217 | MAX6697_REG_CRIT[i]); | |
218 | if (unlikely(val < 0)) { | |
219 | ret = ERR_PTR(val); | |
220 | goto abort; | |
221 | } | |
222 | data->temp[i][MAX6697_TEMP_CRIT] = val; | |
223 | } | |
224 | } | |
225 | ||
226 | alarms = 0; | |
227 | for (i = 0; i < 3; i++) { | |
228 | val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); | |
229 | if (unlikely(val < 0)) { | |
230 | ret = ERR_PTR(val); | |
231 | goto abort; | |
232 | } | |
233 | alarms = (alarms << 8) | val; | |
234 | } | |
235 | data->alarms = alarms; | |
236 | data->last_updated = jiffies; | |
237 | data->valid = true; | |
238 | abort: | |
239 | mutex_unlock(&data->update_lock); | |
240 | ||
241 | return ret; | |
242 | } | |
243 | ||
740c2f2b | 244 | static ssize_t temp_input_show(struct device *dev, |
5372d2d7 GR |
245 | struct device_attribute *devattr, char *buf) |
246 | { | |
247 | int index = to_sensor_dev_attr(devattr)->index; | |
248 | struct max6697_data *data = max6697_update_device(dev); | |
249 | int temp; | |
250 | ||
251 | if (IS_ERR(data)) | |
252 | return PTR_ERR(data); | |
253 | ||
254 | temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; | |
255 | temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; | |
256 | ||
257 | return sprintf(buf, "%d\n", temp * 125); | |
258 | } | |
259 | ||
740c2f2b GR |
260 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
261 | char *buf) | |
5372d2d7 GR |
262 | { |
263 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
264 | int index = to_sensor_dev_attr_2(devattr)->index; | |
265 | struct max6697_data *data = max6697_update_device(dev); | |
266 | int temp; | |
267 | ||
268 | if (IS_ERR(data)) | |
269 | return PTR_ERR(data); | |
270 | ||
271 | temp = data->temp[nr][index]; | |
272 | temp -= data->temp_offset; | |
273 | ||
274 | return sprintf(buf, "%d\n", temp * 1000); | |
275 | } | |
276 | ||
740c2f2b | 277 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
5372d2d7 GR |
278 | char *buf) |
279 | { | |
280 | int index = to_sensor_dev_attr(attr)->index; | |
281 | struct max6697_data *data = max6697_update_device(dev); | |
282 | ||
283 | if (IS_ERR(data)) | |
284 | return PTR_ERR(data); | |
285 | ||
286 | if (data->chip->alarm_map) | |
287 | index = data->chip->alarm_map[index]; | |
288 | ||
289 | return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); | |
290 | } | |
291 | ||
740c2f2b GR |
292 | static ssize_t temp_store(struct device *dev, |
293 | struct device_attribute *devattr, const char *buf, | |
294 | size_t count) | |
5372d2d7 GR |
295 | { |
296 | int nr = to_sensor_dev_attr_2(devattr)->nr; | |
297 | int index = to_sensor_dev_attr_2(devattr)->index; | |
8d373552 | 298 | struct max6697_data *data = dev_get_drvdata(dev); |
5372d2d7 GR |
299 | long temp; |
300 | int ret; | |
301 | ||
302 | ret = kstrtol(buf, 10, &temp); | |
303 | if (ret < 0) | |
304 | return ret; | |
305 | ||
306 | mutex_lock(&data->update_lock); | |
307 | temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; | |
308 | temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); | |
309 | data->temp[nr][index] = temp; | |
8d373552 | 310 | ret = i2c_smbus_write_byte_data(data->client, |
5372d2d7 GR |
311 | index == 2 ? MAX6697_REG_MAX[nr] |
312 | : MAX6697_REG_CRIT[nr], | |
313 | temp); | |
314 | mutex_unlock(&data->update_lock); | |
315 | ||
316 | return ret < 0 ? ret : count; | |
317 | } | |
318 | ||
740c2f2b GR |
319 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); |
320 | static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); | |
321 | static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); | |
322 | ||
323 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); | |
324 | static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); | |
325 | static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); | |
326 | ||
327 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); | |
328 | static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); | |
329 | static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); | |
330 | ||
331 | static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); | |
332 | static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); | |
333 | static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); | |
334 | ||
335 | static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); | |
336 | static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); | |
337 | static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); | |
338 | ||
339 | static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); | |
340 | static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); | |
341 | static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); | |
342 | ||
343 | static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); | |
344 | static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); | |
345 | static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); | |
346 | ||
347 | static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); | |
348 | static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); | |
349 | static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); | |
350 | ||
351 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); | |
352 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); | |
353 | static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); | |
354 | static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); | |
355 | static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); | |
356 | static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); | |
357 | static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); | |
358 | static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); | |
359 | ||
360 | static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); | |
361 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); | |
362 | static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); | |
363 | static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); | |
364 | static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); | |
365 | static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); | |
366 | static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); | |
367 | static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); | |
368 | ||
369 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); | |
370 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); | |
371 | static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); | |
372 | static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); | |
373 | static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); | |
374 | static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); | |
375 | static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); | |
5372d2d7 | 376 | |
6bf44ced GR |
377 | static DEVICE_ATTR(dummy, 0, NULL, NULL); |
378 | ||
379 | static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, | |
380 | int index) | |
381 | { | |
382 | struct device *dev = container_of(kobj, struct device, kobj); | |
8d373552 | 383 | struct max6697_data *data = dev_get_drvdata(dev); |
6bf44ced GR |
384 | const struct max6697_chip_data *chip = data->chip; |
385 | int channel = index / 6; /* channel number */ | |
386 | int nr = index % 6; /* attribute index within channel */ | |
387 | ||
388 | if (channel >= chip->channels) | |
389 | return 0; | |
390 | ||
391 | if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) | |
392 | return 0; | |
393 | if (nr == 5 && !(chip->have_fault & (1 << channel))) | |
394 | return 0; | |
395 | ||
396 | return attr->mode; | |
397 | } | |
398 | ||
399 | /* | |
400 | * max6697_is_visible uses the index into the following array to determine | |
401 | * if attributes should be created or not. Any change in order or content | |
402 | * must be matched in max6697_is_visible. | |
403 | */ | |
404 | static struct attribute *max6697_attributes[] = { | |
405 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
406 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
407 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
408 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
409 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
410 | &dev_attr_dummy.attr, | |
411 | ||
412 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
413 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
414 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
415 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
416 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
417 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
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 | ||
426 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
427 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
428 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
429 | &sensor_dev_attr_temp4_crit.dev_attr.attr, | |
430 | &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, | |
431 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
432 | ||
433 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
434 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
435 | &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, | |
436 | &sensor_dev_attr_temp5_crit.dev_attr.attr, | |
437 | &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, | |
438 | &sensor_dev_attr_temp5_fault.dev_attr.attr, | |
439 | ||
440 | &sensor_dev_attr_temp6_input.dev_attr.attr, | |
441 | &sensor_dev_attr_temp6_max.dev_attr.attr, | |
442 | &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, | |
443 | &sensor_dev_attr_temp6_crit.dev_attr.attr, | |
444 | &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, | |
445 | &sensor_dev_attr_temp6_fault.dev_attr.attr, | |
446 | ||
447 | &sensor_dev_attr_temp7_input.dev_attr.attr, | |
448 | &sensor_dev_attr_temp7_max.dev_attr.attr, | |
449 | &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, | |
450 | &sensor_dev_attr_temp7_crit.dev_attr.attr, | |
451 | &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, | |
452 | &sensor_dev_attr_temp7_fault.dev_attr.attr, | |
453 | ||
454 | &sensor_dev_attr_temp8_input.dev_attr.attr, | |
455 | &sensor_dev_attr_temp8_max.dev_attr.attr, | |
456 | &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, | |
457 | &sensor_dev_attr_temp8_crit.dev_attr.attr, | |
458 | &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, | |
459 | &sensor_dev_attr_temp8_fault.dev_attr.attr, | |
460 | NULL | |
5372d2d7 GR |
461 | }; |
462 | ||
6bf44ced GR |
463 | static const struct attribute_group max6697_group = { |
464 | .attrs = max6697_attributes, .is_visible = max6697_is_visible, | |
5372d2d7 | 465 | }; |
8d373552 | 466 | __ATTRIBUTE_GROUPS(max6697); |
5372d2d7 GR |
467 | |
468 | static void max6697_get_config_of(struct device_node *node, | |
469 | struct max6697_platform_data *pdata) | |
470 | { | |
471 | int len; | |
472 | const __be32 *prop; | |
473 | ||
8de2dcc9 AL |
474 | pdata->smbus_timeout_disable = |
475 | of_property_read_bool(node, "smbus-timeout-disable"); | |
476 | pdata->extended_range_enable = | |
477 | of_property_read_bool(node, "extended-range-enable"); | |
478 | pdata->beta_compensation = | |
479 | of_property_read_bool(node, "beta-compensation-enable"); | |
480 | ||
5372d2d7 GR |
481 | prop = of_get_property(node, "alert-mask", &len); |
482 | if (prop && len == sizeof(u32)) | |
483 | pdata->alert_mask = be32_to_cpu(prop[0]); | |
484 | prop = of_get_property(node, "over-temperature-mask", &len); | |
485 | if (prop && len == sizeof(u32)) | |
486 | pdata->over_temperature_mask = be32_to_cpu(prop[0]); | |
487 | prop = of_get_property(node, "resistance-cancellation", &len); | |
488 | if (prop) { | |
489 | if (len == sizeof(u32)) | |
490 | pdata->resistance_cancellation = be32_to_cpu(prop[0]); | |
491 | else | |
492 | pdata->resistance_cancellation = 0xfe; | |
493 | } | |
494 | prop = of_get_property(node, "transistor-ideality", &len); | |
495 | if (prop && len == 2 * sizeof(u32)) { | |
496 | pdata->ideality_mask = be32_to_cpu(prop[0]); | |
497 | pdata->ideality_value = be32_to_cpu(prop[1]); | |
498 | } | |
499 | } | |
500 | ||
8d373552 GR |
501 | static int max6697_init_chip(struct max6697_data *data, |
502 | struct i2c_client *client) | |
5372d2d7 | 503 | { |
5372d2d7 GR |
504 | struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); |
505 | struct max6697_platform_data p; | |
506 | const struct max6697_chip_data *chip = data->chip; | |
507 | int factor = chip->channels; | |
508 | int ret, reg; | |
509 | ||
510 | /* | |
511 | * Don't touch configuration if neither platform data nor OF | |
512 | * configuration was specified. If that is the case, use the | |
513 | * current chip configuration. | |
514 | */ | |
515 | if (!pdata && !client->dev.of_node) { | |
516 | reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); | |
517 | if (reg < 0) | |
518 | return reg; | |
519 | if (data->type == max6581) { | |
520 | if (reg & MAX6581_CONF_EXTENDED) | |
521 | data->temp_offset = 64; | |
522 | reg = i2c_smbus_read_byte_data(client, | |
523 | MAX6581_REG_RESISTANCE); | |
524 | if (reg < 0) | |
525 | return reg; | |
526 | factor += hweight8(reg); | |
527 | } else { | |
528 | if (reg & MAX6697_CONF_RESISTANCE) | |
529 | factor++; | |
530 | } | |
531 | goto done; | |
532 | } | |
533 | ||
534 | if (client->dev.of_node) { | |
535 | memset(&p, 0, sizeof(p)); | |
536 | max6697_get_config_of(client->dev.of_node, &p); | |
537 | pdata = &p; | |
538 | } | |
539 | ||
540 | reg = 0; | |
541 | if (pdata->smbus_timeout_disable && | |
542 | (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { | |
543 | reg |= MAX6697_CONF_TIMEOUT; | |
544 | } | |
545 | if (pdata->extended_range_enable && | |
546 | (chip->valid_conf & MAX6581_CONF_EXTENDED)) { | |
547 | reg |= MAX6581_CONF_EXTENDED; | |
548 | data->temp_offset = 64; | |
549 | } | |
550 | if (pdata->resistance_cancellation && | |
551 | (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { | |
552 | reg |= MAX6697_CONF_RESISTANCE; | |
553 | factor++; | |
554 | } | |
555 | if (pdata->beta_compensation && | |
556 | (chip->valid_conf & MAX6693_CONF_BETA)) { | |
557 | reg |= MAX6693_CONF_BETA; | |
558 | } | |
559 | ||
560 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); | |
561 | if (ret < 0) | |
562 | return ret; | |
563 | ||
564 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, | |
565 | MAX6697_MAP_BITS(pdata->alert_mask)); | |
566 | if (ret < 0) | |
567 | return ret; | |
568 | ||
569 | ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, | |
570 | MAX6697_MAP_BITS(pdata->over_temperature_mask)); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | ||
574 | if (data->type == max6581) { | |
575 | factor += hweight8(pdata->resistance_cancellation >> 1); | |
576 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, | |
577 | pdata->resistance_cancellation >> 1); | |
578 | if (ret < 0) | |
579 | return ret; | |
580 | ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, | |
5c52add1 | 581 | pdata->ideality_value); |
5372d2d7 GR |
582 | if (ret < 0) |
583 | return ret; | |
584 | ret = i2c_smbus_write_byte_data(client, | |
585 | MAX6581_REG_IDEALITY_SELECT, | |
5c52add1 | 586 | pdata->ideality_mask >> 1); |
5372d2d7 GR |
587 | if (ret < 0) |
588 | return ret; | |
589 | } | |
590 | done: | |
591 | data->update_interval = factor * MAX6697_CONV_TIME; | |
592 | return 0; | |
593 | } | |
594 | ||
5372d2d7 GR |
595 | static int max6697_probe(struct i2c_client *client, |
596 | const struct i2c_device_id *id) | |
597 | { | |
598 | struct i2c_adapter *adapter = client->adapter; | |
599 | struct device *dev = &client->dev; | |
600 | struct max6697_data *data; | |
8d373552 | 601 | struct device *hwmon_dev; |
6bf44ced | 602 | int err; |
5372d2d7 GR |
603 | |
604 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
605 | return -ENODEV; | |
606 | ||
607 | data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); | |
608 | if (!data) | |
609 | return -ENOMEM; | |
610 | ||
9e427083 JMC |
611 | if (client->dev.of_node) |
612 | data->type = (enum chips)of_device_get_match_data(&client->dev); | |
613 | else | |
614 | data->type = id->driver_data; | |
5372d2d7 | 615 | data->chip = &max6697_chip_data[data->type]; |
8d373552 | 616 | data->client = client; |
5372d2d7 GR |
617 | mutex_init(&data->update_lock); |
618 | ||
8d373552 | 619 | err = max6697_init_chip(data, client); |
5372d2d7 GR |
620 | if (err) |
621 | return err; | |
622 | ||
8d373552 GR |
623 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
624 | data, | |
625 | max6697_groups); | |
4109a716 | 626 | return PTR_ERR_OR_ZERO(hwmon_dev); |
5372d2d7 GR |
627 | } |
628 | ||
629 | static const struct i2c_device_id max6697_id[] = { | |
630 | { "max6581", max6581 }, | |
631 | { "max6602", max6602 }, | |
632 | { "max6622", max6622 }, | |
633 | { "max6636", max6636 }, | |
634 | { "max6689", max6689 }, | |
635 | { "max6693", max6693 }, | |
636 | { "max6694", max6694 }, | |
637 | { "max6697", max6697 }, | |
638 | { "max6698", max6698 }, | |
639 | { "max6699", max6699 }, | |
640 | { } | |
641 | }; | |
642 | MODULE_DEVICE_TABLE(i2c, max6697_id); | |
643 | ||
f198a869 | 644 | static const struct of_device_id __maybe_unused max6697_of_match[] = { |
9e427083 JMC |
645 | { |
646 | .compatible = "maxim,max6581", | |
647 | .data = (void *)max6581 | |
648 | }, | |
649 | { | |
650 | .compatible = "maxim,max6602", | |
651 | .data = (void *)max6602 | |
652 | }, | |
653 | { | |
654 | .compatible = "maxim,max6622", | |
655 | .data = (void *)max6622 | |
656 | }, | |
657 | { | |
658 | .compatible = "maxim,max6636", | |
659 | .data = (void *)max6636 | |
660 | }, | |
661 | { | |
662 | .compatible = "maxim,max6689", | |
663 | .data = (void *)max6689 | |
664 | }, | |
665 | { | |
666 | .compatible = "maxim,max6693", | |
667 | .data = (void *)max6693 | |
668 | }, | |
669 | { | |
670 | .compatible = "maxim,max6694", | |
671 | .data = (void *)max6694 | |
672 | }, | |
673 | { | |
674 | .compatible = "maxim,max6697", | |
675 | .data = (void *)max6697 | |
676 | }, | |
677 | { | |
678 | .compatible = "maxim,max6698", | |
679 | .data = (void *)max6698 | |
680 | }, | |
681 | { | |
682 | .compatible = "maxim,max6699", | |
683 | .data = (void *)max6699 | |
684 | }, | |
685 | { }, | |
686 | }; | |
687 | MODULE_DEVICE_TABLE(of, max6697_of_match); | |
688 | ||
5372d2d7 GR |
689 | static struct i2c_driver max6697_driver = { |
690 | .class = I2C_CLASS_HWMON, | |
691 | .driver = { | |
692 | .name = "max6697", | |
9e427083 | 693 | .of_match_table = of_match_ptr(max6697_of_match), |
5372d2d7 GR |
694 | }, |
695 | .probe = max6697_probe, | |
5372d2d7 GR |
696 | .id_table = max6697_id, |
697 | }; | |
698 | ||
699 | module_i2c_driver(max6697_driver); | |
700 | ||
701 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
702 | MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); | |
703 | MODULE_LICENSE("GPL"); |