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195a4b42 IH |
1 | /* |
2 | * max31790.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring. | |
4 | * | |
5 | * (C) 2015 by Il Han <corone.il.han@gmail.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/err.h> | |
19 | #include <linux/hwmon.h> | |
20 | #include <linux/hwmon-sysfs.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/slab.h> | |
26 | ||
27 | /* MAX31790 registers */ | |
28 | #define MAX31790_REG_GLOBAL_CONFIG 0x00 | |
29 | #define MAX31790_REG_FAN_CONFIG(ch) (0x02 + (ch)) | |
30 | #define MAX31790_REG_FAN_DYNAMICS(ch) (0x08 + (ch)) | |
31 | #define MAX31790_REG_FAN_FAULT_STATUS2 0x10 | |
32 | #define MAX31790_REG_FAN_FAULT_STATUS1 0x11 | |
33 | #define MAX31790_REG_TACH_COUNT(ch) (0x18 + (ch) * 2) | |
34 | #define MAX31790_REG_PWM_DUTY_CYCLE(ch) (0x30 + (ch) * 2) | |
35 | #define MAX31790_REG_PWMOUT(ch) (0x40 + (ch) * 2) | |
36 | #define MAX31790_REG_TARGET_COUNT(ch) (0x50 + (ch) * 2) | |
37 | ||
38 | /* Fan Config register bits */ | |
39 | #define MAX31790_FAN_CFG_RPM_MODE 0x80 | |
40 | #define MAX31790_FAN_CFG_TACH_INPUT_EN 0x08 | |
41 | #define MAX31790_FAN_CFG_TACH_INPUT 0x01 | |
42 | ||
43 | /* Fan Dynamics register bits */ | |
44 | #define MAX31790_FAN_DYN_SR_SHIFT 5 | |
45 | #define MAX31790_FAN_DYN_SR_MASK 0xE0 | |
46 | #define SR_FROM_REG(reg) (((reg) & MAX31790_FAN_DYN_SR_MASK) \ | |
47 | >> MAX31790_FAN_DYN_SR_SHIFT) | |
48 | ||
49 | #define FAN_RPM_MIN 120 | |
50 | #define FAN_RPM_MAX 7864320 | |
51 | ||
52 | #define RPM_FROM_REG(reg, sr) (((reg) >> 4) ? \ | |
53 | ((60 * (sr) * 8192) / ((reg) >> 4)) : \ | |
54 | FAN_RPM_MAX) | |
55 | #define RPM_TO_REG(rpm, sr) ((60 * (sr) * 8192) / ((rpm) * 2)) | |
56 | ||
57 | #define NR_CHANNEL 6 | |
58 | ||
59 | /* | |
60 | * Client data (each client gets its own) | |
61 | */ | |
62 | struct max31790_data { | |
63 | struct i2c_client *client; | |
64 | struct mutex update_lock; | |
65 | bool valid; /* zero until following fields are valid */ | |
66 | unsigned long last_updated; /* in jiffies */ | |
67 | ||
68 | /* register values */ | |
69 | u8 fan_config[NR_CHANNEL]; | |
70 | u8 fan_dynamics[NR_CHANNEL]; | |
71 | u16 fault_status; | |
72 | u16 tach[NR_CHANNEL * 2]; | |
73 | u16 pwm[NR_CHANNEL]; | |
74 | u16 target_count[NR_CHANNEL]; | |
75 | }; | |
76 | ||
77 | static struct max31790_data *max31790_update_device(struct device *dev) | |
78 | { | |
79 | struct max31790_data *data = dev_get_drvdata(dev); | |
80 | struct i2c_client *client = data->client; | |
81 | struct max31790_data *ret = data; | |
82 | int i; | |
83 | int rv; | |
84 | ||
85 | mutex_lock(&data->update_lock); | |
86 | ||
87 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
88 | rv = i2c_smbus_read_byte_data(client, | |
89 | MAX31790_REG_FAN_FAULT_STATUS1); | |
90 | if (rv < 0) | |
91 | goto abort; | |
92 | data->fault_status = rv & 0x3F; | |
93 | ||
94 | rv = i2c_smbus_read_byte_data(client, | |
95 | MAX31790_REG_FAN_FAULT_STATUS2); | |
96 | if (rv < 0) | |
97 | goto abort; | |
98 | data->fault_status |= (rv & 0x3F) << 6; | |
99 | ||
100 | for (i = 0; i < NR_CHANNEL; i++) { | |
101 | rv = i2c_smbus_read_word_swapped(client, | |
102 | MAX31790_REG_TACH_COUNT(i)); | |
103 | if (rv < 0) | |
104 | goto abort; | |
105 | data->tach[i] = rv; | |
106 | ||
107 | if (data->fan_config[i] | |
108 | & MAX31790_FAN_CFG_TACH_INPUT) { | |
109 | rv = i2c_smbus_read_word_swapped(client, | |
110 | MAX31790_REG_TACH_COUNT(NR_CHANNEL | |
111 | + i)); | |
112 | if (rv < 0) | |
113 | goto abort; | |
114 | data->tach[NR_CHANNEL + i] = rv; | |
115 | } else { | |
116 | rv = i2c_smbus_read_word_swapped(client, | |
117 | MAX31790_REG_PWMOUT(i)); | |
118 | if (rv < 0) | |
119 | goto abort; | |
120 | data->pwm[i] = rv; | |
121 | ||
122 | rv = i2c_smbus_read_word_swapped(client, | |
123 | MAX31790_REG_TARGET_COUNT(i)); | |
124 | if (rv < 0) | |
125 | goto abort; | |
126 | data->target_count[i] = rv; | |
127 | } | |
128 | } | |
129 | ||
130 | data->last_updated = jiffies; | |
131 | data->valid = true; | |
132 | } | |
133 | goto done; | |
134 | ||
135 | abort: | |
136 | data->valid = false; | |
137 | ret = ERR_PTR(rv); | |
138 | ||
139 | done: | |
140 | mutex_unlock(&data->update_lock); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | static const u8 tach_period[8] = { 1, 2, 4, 8, 16, 32, 32, 32 }; | |
146 | ||
147 | static u8 get_tach_period(u8 fan_dynamics) | |
148 | { | |
149 | return tach_period[SR_FROM_REG(fan_dynamics)]; | |
150 | } | |
151 | ||
152 | static u8 bits_for_tach_period(int rpm) | |
153 | { | |
154 | u8 bits; | |
155 | ||
156 | if (rpm < 500) | |
157 | bits = 0x0; | |
158 | else if (rpm < 1000) | |
159 | bits = 0x1; | |
160 | else if (rpm < 2000) | |
161 | bits = 0x2; | |
162 | else if (rpm < 4000) | |
163 | bits = 0x3; | |
164 | else if (rpm < 8000) | |
165 | bits = 0x4; | |
166 | else | |
167 | bits = 0x5; | |
168 | ||
169 | return bits; | |
170 | } | |
171 | ||
172 | static ssize_t get_fan(struct device *dev, | |
173 | struct device_attribute *devattr, char *buf) | |
174 | { | |
175 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
176 | struct max31790_data *data = max31790_update_device(dev); | |
791432cf | 177 | int sr, rpm; |
195a4b42 IH |
178 | |
179 | if (IS_ERR(data)) | |
180 | return PTR_ERR(data); | |
181 | ||
791432cf | 182 | sr = get_tach_period(data->fan_dynamics[attr->index]); |
195a4b42 IH |
183 | rpm = RPM_FROM_REG(data->tach[attr->index], sr); |
184 | ||
185 | return sprintf(buf, "%d\n", rpm); | |
186 | } | |
187 | ||
188 | static ssize_t get_fan_target(struct device *dev, | |
189 | struct device_attribute *devattr, char *buf) | |
190 | { | |
191 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
192 | struct max31790_data *data = max31790_update_device(dev); | |
791432cf | 193 | int sr, rpm; |
195a4b42 IH |
194 | |
195 | if (IS_ERR(data)) | |
196 | return PTR_ERR(data); | |
197 | ||
791432cf | 198 | sr = get_tach_period(data->fan_dynamics[attr->index]); |
195a4b42 IH |
199 | rpm = RPM_FROM_REG(data->target_count[attr->index], sr); |
200 | ||
201 | return sprintf(buf, "%d\n", rpm); | |
202 | } | |
203 | ||
204 | static ssize_t set_fan_target(struct device *dev, | |
205 | struct device_attribute *devattr, | |
206 | const char *buf, size_t count) | |
207 | { | |
208 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
209 | struct max31790_data *data = dev_get_drvdata(dev); | |
210 | struct i2c_client *client = data->client; | |
211 | u8 bits; | |
212 | int sr; | |
213 | int target_count; | |
214 | unsigned long rpm; | |
215 | int err; | |
216 | ||
217 | err = kstrtoul(buf, 10, &rpm); | |
218 | if (err) | |
219 | return err; | |
220 | ||
221 | mutex_lock(&data->update_lock); | |
222 | ||
223 | rpm = clamp_val(rpm, FAN_RPM_MIN, FAN_RPM_MAX); | |
224 | bits = bits_for_tach_period(rpm); | |
225 | data->fan_dynamics[attr->index] = | |
226 | ((data->fan_dynamics[attr->index] | |
227 | & ~MAX31790_FAN_DYN_SR_MASK) | |
228 | | (bits << MAX31790_FAN_DYN_SR_SHIFT)); | |
229 | err = i2c_smbus_write_byte_data(client, | |
230 | MAX31790_REG_FAN_DYNAMICS(attr->index), | |
231 | data->fan_dynamics[attr->index]); | |
232 | ||
233 | if (err < 0) { | |
234 | mutex_unlock(&data->update_lock); | |
235 | return err; | |
236 | } | |
237 | ||
238 | sr = get_tach_period(data->fan_dynamics[attr->index]); | |
239 | target_count = RPM_TO_REG(rpm, sr); | |
240 | target_count = clamp_val(target_count, 0x1, 0x7FF); | |
241 | ||
242 | data->target_count[attr->index] = target_count << 5; | |
243 | ||
244 | err = i2c_smbus_write_word_swapped(client, | |
245 | MAX31790_REG_TARGET_COUNT(attr->index), | |
246 | data->target_count[attr->index]); | |
247 | ||
248 | mutex_unlock(&data->update_lock); | |
249 | ||
250 | if (err < 0) | |
251 | return err; | |
252 | ||
253 | return count; | |
254 | } | |
255 | ||
256 | static ssize_t get_pwm(struct device *dev, | |
257 | struct device_attribute *devattr, char *buf) | |
258 | { | |
259 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
260 | struct max31790_data *data = max31790_update_device(dev); | |
261 | int pwm; | |
262 | ||
263 | if (IS_ERR(data)) | |
264 | return PTR_ERR(data); | |
265 | ||
266 | pwm = data->pwm[attr->index] >> 8; | |
267 | ||
268 | return sprintf(buf, "%d\n", pwm); | |
269 | } | |
270 | ||
271 | static ssize_t set_pwm(struct device *dev, | |
272 | struct device_attribute *devattr, | |
273 | const char *buf, size_t count) | |
274 | { | |
275 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
276 | struct max31790_data *data = dev_get_drvdata(dev); | |
277 | struct i2c_client *client = data->client; | |
278 | unsigned long pwm; | |
279 | int err; | |
280 | ||
281 | err = kstrtoul(buf, 10, &pwm); | |
282 | if (err) | |
283 | return err; | |
284 | ||
285 | if (pwm > 255) | |
286 | return -EINVAL; | |
287 | ||
288 | mutex_lock(&data->update_lock); | |
289 | ||
290 | data->pwm[attr->index] = pwm << 8; | |
291 | err = i2c_smbus_write_word_swapped(client, | |
292 | MAX31790_REG_PWMOUT(attr->index), | |
293 | data->pwm[attr->index]); | |
294 | ||
295 | mutex_unlock(&data->update_lock); | |
296 | ||
297 | if (err < 0) | |
298 | return err; | |
299 | ||
300 | return count; | |
301 | } | |
302 | ||
303 | static ssize_t get_pwm_enable(struct device *dev, | |
304 | struct device_attribute *devattr, char *buf) | |
305 | { | |
306 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
307 | struct max31790_data *data = max31790_update_device(dev); | |
308 | int mode; | |
309 | ||
310 | if (IS_ERR(data)) | |
311 | return PTR_ERR(data); | |
312 | ||
313 | if (data->fan_config[attr->index] & MAX31790_FAN_CFG_RPM_MODE) | |
314 | mode = 2; | |
315 | else if (data->fan_config[attr->index] & MAX31790_FAN_CFG_TACH_INPUT_EN) | |
316 | mode = 1; | |
317 | else | |
318 | mode = 0; | |
319 | ||
320 | return sprintf(buf, "%d\n", mode); | |
321 | } | |
322 | ||
323 | static ssize_t set_pwm_enable(struct device *dev, | |
324 | struct device_attribute *devattr, | |
325 | const char *buf, size_t count) | |
326 | { | |
327 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
328 | struct max31790_data *data = dev_get_drvdata(dev); | |
329 | struct i2c_client *client = data->client; | |
330 | unsigned long mode; | |
331 | int err; | |
332 | ||
333 | err = kstrtoul(buf, 10, &mode); | |
334 | if (err) | |
335 | return err; | |
336 | ||
337 | switch (mode) { | |
338 | case 0: | |
339 | data->fan_config[attr->index] = | |
340 | data->fan_config[attr->index] | |
341 | & ~(MAX31790_FAN_CFG_TACH_INPUT_EN | |
342 | | MAX31790_FAN_CFG_RPM_MODE); | |
343 | break; | |
344 | case 1: | |
345 | data->fan_config[attr->index] = | |
346 | (data->fan_config[attr->index] | |
347 | | MAX31790_FAN_CFG_TACH_INPUT_EN) | |
348 | & ~MAX31790_FAN_CFG_RPM_MODE; | |
349 | break; | |
350 | case 2: | |
351 | data->fan_config[attr->index] = | |
352 | data->fan_config[attr->index] | |
353 | | MAX31790_FAN_CFG_TACH_INPUT_EN | |
354 | | MAX31790_FAN_CFG_RPM_MODE; | |
355 | break; | |
356 | default: | |
357 | return -EINVAL; | |
358 | } | |
359 | ||
360 | mutex_lock(&data->update_lock); | |
361 | ||
362 | err = i2c_smbus_write_byte_data(client, | |
363 | MAX31790_REG_FAN_CONFIG(attr->index), | |
364 | data->fan_config[attr->index]); | |
365 | ||
366 | mutex_unlock(&data->update_lock); | |
367 | ||
368 | if (err < 0) | |
369 | return err; | |
370 | ||
371 | return count; | |
372 | } | |
373 | ||
374 | static ssize_t get_fan_fault(struct device *dev, | |
375 | struct device_attribute *devattr, char *buf) | |
376 | { | |
377 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
378 | struct max31790_data *data = max31790_update_device(dev); | |
379 | int fault; | |
380 | ||
381 | if (IS_ERR(data)) | |
382 | return PTR_ERR(data); | |
383 | ||
384 | fault = !!(data->fault_status & (1 << attr->index)); | |
385 | ||
386 | return sprintf(buf, "%d\n", fault); | |
387 | } | |
388 | ||
389 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, 0); | |
390 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan, NULL, 1); | |
391 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, get_fan, NULL, 2); | |
392 | static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, get_fan, NULL, 3); | |
393 | static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, get_fan, NULL, 4); | |
394 | static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, get_fan, NULL, 5); | |
395 | ||
396 | static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan_fault, NULL, 0); | |
397 | static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, get_fan_fault, NULL, 1); | |
398 | static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, get_fan_fault, NULL, 2); | |
399 | static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, get_fan_fault, NULL, 3); | |
400 | static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, get_fan_fault, NULL, 4); | |
401 | static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, get_fan_fault, NULL, 5); | |
402 | ||
403 | static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, get_fan, NULL, 6); | |
404 | static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, get_fan, NULL, 7); | |
405 | static SENSOR_DEVICE_ATTR(fan9_input, S_IRUGO, get_fan, NULL, 8); | |
406 | static SENSOR_DEVICE_ATTR(fan10_input, S_IRUGO, get_fan, NULL, 9); | |
407 | static SENSOR_DEVICE_ATTR(fan11_input, S_IRUGO, get_fan, NULL, 10); | |
408 | static SENSOR_DEVICE_ATTR(fan12_input, S_IRUGO, get_fan, NULL, 11); | |
409 | ||
410 | static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, get_fan_fault, NULL, 6); | |
411 | static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, get_fan_fault, NULL, 7); | |
412 | static SENSOR_DEVICE_ATTR(fan9_fault, S_IRUGO, get_fan_fault, NULL, 8); | |
413 | static SENSOR_DEVICE_ATTR(fan10_fault, S_IRUGO, get_fan_fault, NULL, 9); | |
414 | static SENSOR_DEVICE_ATTR(fan11_fault, S_IRUGO, get_fan_fault, NULL, 10); | |
415 | static SENSOR_DEVICE_ATTR(fan12_fault, S_IRUGO, get_fan_fault, NULL, 11); | |
416 | ||
417 | static SENSOR_DEVICE_ATTR(fan1_target, S_IWUSR | S_IRUGO, | |
418 | get_fan_target, set_fan_target, 0); | |
419 | static SENSOR_DEVICE_ATTR(fan2_target, S_IWUSR | S_IRUGO, | |
420 | get_fan_target, set_fan_target, 1); | |
421 | static SENSOR_DEVICE_ATTR(fan3_target, S_IWUSR | S_IRUGO, | |
422 | get_fan_target, set_fan_target, 2); | |
423 | static SENSOR_DEVICE_ATTR(fan4_target, S_IWUSR | S_IRUGO, | |
424 | get_fan_target, set_fan_target, 3); | |
425 | static SENSOR_DEVICE_ATTR(fan5_target, S_IWUSR | S_IRUGO, | |
426 | get_fan_target, set_fan_target, 4); | |
427 | static SENSOR_DEVICE_ATTR(fan6_target, S_IWUSR | S_IRUGO, | |
428 | get_fan_target, set_fan_target, 5); | |
429 | ||
430 | static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 0); | |
431 | static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 1); | |
432 | static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 2); | |
433 | static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 3); | |
434 | static SENSOR_DEVICE_ATTR(pwm5, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 4); | |
435 | static SENSOR_DEVICE_ATTR(pwm6, S_IWUSR | S_IRUGO, get_pwm, set_pwm, 5); | |
436 | ||
437 | static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, | |
438 | get_pwm_enable, set_pwm_enable, 0); | |
439 | static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, | |
440 | get_pwm_enable, set_pwm_enable, 1); | |
441 | static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, | |
442 | get_pwm_enable, set_pwm_enable, 2); | |
443 | static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, | |
444 | get_pwm_enable, set_pwm_enable, 3); | |
445 | static SENSOR_DEVICE_ATTR(pwm5_enable, S_IWUSR | S_IRUGO, | |
446 | get_pwm_enable, set_pwm_enable, 4); | |
447 | static SENSOR_DEVICE_ATTR(pwm6_enable, S_IWUSR | S_IRUGO, | |
448 | get_pwm_enable, set_pwm_enable, 5); | |
449 | ||
450 | static struct attribute *max31790_attrs[] = { | |
451 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
452 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
453 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
454 | &sensor_dev_attr_fan4_input.dev_attr.attr, | |
455 | &sensor_dev_attr_fan5_input.dev_attr.attr, | |
456 | &sensor_dev_attr_fan6_input.dev_attr.attr, | |
457 | ||
458 | &sensor_dev_attr_fan1_fault.dev_attr.attr, | |
459 | &sensor_dev_attr_fan2_fault.dev_attr.attr, | |
460 | &sensor_dev_attr_fan3_fault.dev_attr.attr, | |
461 | &sensor_dev_attr_fan4_fault.dev_attr.attr, | |
462 | &sensor_dev_attr_fan5_fault.dev_attr.attr, | |
463 | &sensor_dev_attr_fan6_fault.dev_attr.attr, | |
464 | ||
465 | &sensor_dev_attr_fan7_input.dev_attr.attr, | |
466 | &sensor_dev_attr_fan8_input.dev_attr.attr, | |
467 | &sensor_dev_attr_fan9_input.dev_attr.attr, | |
468 | &sensor_dev_attr_fan10_input.dev_attr.attr, | |
469 | &sensor_dev_attr_fan11_input.dev_attr.attr, | |
470 | &sensor_dev_attr_fan12_input.dev_attr.attr, | |
471 | ||
472 | &sensor_dev_attr_fan7_fault.dev_attr.attr, | |
473 | &sensor_dev_attr_fan8_fault.dev_attr.attr, | |
474 | &sensor_dev_attr_fan9_fault.dev_attr.attr, | |
475 | &sensor_dev_attr_fan10_fault.dev_attr.attr, | |
476 | &sensor_dev_attr_fan11_fault.dev_attr.attr, | |
477 | &sensor_dev_attr_fan12_fault.dev_attr.attr, | |
478 | ||
479 | &sensor_dev_attr_fan1_target.dev_attr.attr, | |
480 | &sensor_dev_attr_fan2_target.dev_attr.attr, | |
481 | &sensor_dev_attr_fan3_target.dev_attr.attr, | |
482 | &sensor_dev_attr_fan4_target.dev_attr.attr, | |
483 | &sensor_dev_attr_fan5_target.dev_attr.attr, | |
484 | &sensor_dev_attr_fan6_target.dev_attr.attr, | |
485 | ||
486 | &sensor_dev_attr_pwm1.dev_attr.attr, | |
487 | &sensor_dev_attr_pwm2.dev_attr.attr, | |
488 | &sensor_dev_attr_pwm3.dev_attr.attr, | |
489 | &sensor_dev_attr_pwm4.dev_attr.attr, | |
490 | &sensor_dev_attr_pwm5.dev_attr.attr, | |
491 | &sensor_dev_attr_pwm6.dev_attr.attr, | |
492 | ||
493 | &sensor_dev_attr_pwm1_enable.dev_attr.attr, | |
494 | &sensor_dev_attr_pwm2_enable.dev_attr.attr, | |
495 | &sensor_dev_attr_pwm3_enable.dev_attr.attr, | |
496 | &sensor_dev_attr_pwm4_enable.dev_attr.attr, | |
497 | &sensor_dev_attr_pwm5_enable.dev_attr.attr, | |
498 | &sensor_dev_attr_pwm6_enable.dev_attr.attr, | |
499 | NULL | |
500 | }; | |
501 | ||
502 | static umode_t max31790_attrs_visible(struct kobject *kobj, | |
503 | struct attribute *a, int n) | |
504 | { | |
505 | struct device *dev = container_of(kobj, struct device, kobj); | |
506 | struct max31790_data *data = dev_get_drvdata(dev); | |
507 | struct device_attribute *devattr = | |
508 | container_of(a, struct device_attribute, attr); | |
509 | int index = to_sensor_dev_attr(devattr)->index % NR_CHANNEL; | |
510 | u8 fan_config; | |
511 | ||
512 | fan_config = data->fan_config[index]; | |
513 | ||
514 | if (n >= NR_CHANNEL * 2 && n < NR_CHANNEL * 4 && | |
515 | !(fan_config & MAX31790_FAN_CFG_TACH_INPUT)) | |
516 | return 0; | |
517 | if (n >= NR_CHANNEL * 4 && (fan_config & MAX31790_FAN_CFG_TACH_INPUT)) | |
518 | return 0; | |
519 | ||
520 | return a->mode; | |
521 | } | |
522 | ||
523 | static const struct attribute_group max31790_group = { | |
524 | .attrs = max31790_attrs, | |
525 | .is_visible = max31790_attrs_visible, | |
526 | }; | |
527 | __ATTRIBUTE_GROUPS(max31790); | |
528 | ||
529 | static int max31790_init_client(struct i2c_client *client, | |
530 | struct max31790_data *data) | |
531 | { | |
532 | int i, rv; | |
533 | ||
534 | for (i = 0; i < NR_CHANNEL; i++) { | |
535 | rv = i2c_smbus_read_byte_data(client, | |
536 | MAX31790_REG_FAN_CONFIG(i)); | |
537 | if (rv < 0) | |
538 | return rv; | |
539 | data->fan_config[i] = rv; | |
540 | ||
541 | rv = i2c_smbus_read_byte_data(client, | |
542 | MAX31790_REG_FAN_DYNAMICS(i)); | |
543 | if (rv < 0) | |
544 | return rv; | |
545 | data->fan_dynamics[i] = rv; | |
546 | } | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | static int max31790_probe(struct i2c_client *client, | |
552 | const struct i2c_device_id *id) | |
553 | { | |
554 | struct i2c_adapter *adapter = client->adapter; | |
555 | struct device *dev = &client->dev; | |
556 | struct max31790_data *data; | |
557 | struct device *hwmon_dev; | |
558 | int err; | |
559 | ||
560 | if (!i2c_check_functionality(adapter, | |
561 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) | |
562 | return -ENODEV; | |
563 | ||
564 | data = devm_kzalloc(dev, sizeof(struct max31790_data), GFP_KERNEL); | |
565 | if (!data) | |
566 | return -ENOMEM; | |
567 | ||
568 | data->client = client; | |
569 | mutex_init(&data->update_lock); | |
570 | ||
571 | /* | |
572 | * Initialize the max31790 chip | |
573 | */ | |
574 | err = max31790_init_client(client, data); | |
575 | if (err) | |
576 | return err; | |
577 | ||
578 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, | |
579 | client->name, data, max31790_groups); | |
580 | ||
581 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
582 | } | |
583 | ||
584 | static const struct i2c_device_id max31790_id[] = { | |
585 | { "max31790", 0 }, | |
586 | { } | |
587 | }; | |
588 | MODULE_DEVICE_TABLE(i2c, max31790_id); | |
589 | ||
590 | static struct i2c_driver max31790_driver = { | |
591 | .class = I2C_CLASS_HWMON, | |
592 | .probe = max31790_probe, | |
593 | .driver = { | |
594 | .name = "max31790", | |
595 | }, | |
596 | .id_table = max31790_id, | |
597 | }; | |
598 | ||
599 | module_i2c_driver(max31790_driver); | |
600 | ||
601 | MODULE_AUTHOR("Il Han <corone.il.han@gmail.com>"); | |
602 | MODULE_DESCRIPTION("MAX31790 sensor driver"); | |
603 | MODULE_LICENSE("GPL"); |