1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * lm63.c - driver for the National Semiconductor LM63 temperature sensor |
4 | * with integrated fan control |
5 | * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de> |
6 | * Based on the lm90 driver. |
7 | * |
8 | * The LM63 is a sensor chip made by National Semiconductor. It measures |
9 | * two temperatures (its own and one external one) and the speed of one |
10 | * fan, those speed it can additionally control. Complete datasheet can be |
11 | * obtained from National's website at: |
12 | * http://www.national.com/pf/LM/LM63.html |
13 | * |
14 | * The LM63 is basically an LM86 with fan speed monitoring and control |
15 | * capabilities added. It misses some of the LM86 features though: |
16 | * - No low limit for local temperature. |
17 | * - No critical limit for local temperature. |
18 | * - Critical limit for remote temperature can be changed only once. We |
19 | * will consider that the critical limit is read-only. |
20 | * |
21 | * The datasheet isn't very clear about what the tachometer reading is. |
22 | * I had a explanation from National Semiconductor though. The two lower |
23 | * bits of the read value have to be masked out. The value is still 16 bit |
24 | * in width. |
25 | */ |
26 | |
27 | #include <linux/module.h> |
28 | #include <linux/init.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/jiffies.h> |
31 | #include <linux/i2c.h> |
32 | #include <linux/hwmon-sysfs.h> |
33 | #include <linux/hwmon.h> |
34 | #include <linux/err.h> |
35 | #include <linux/mutex.h> |
36 | #include <linux/of.h> |
37 | #include <linux/sysfs.h> |
38 | #include <linux/types.h> |
39 | |
40 | /* |
41 | * Addresses to scan |
42 | * Address is fully defined internally and cannot be changed except for |
43 | * LM64 which has one pin dedicated to address selection. |
44 | * LM63 and LM96163 have address 0x4c. |
45 | * LM64 can have address 0x18 or 0x4e. |
46 | */ |
47 | |
48 | static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; |
49 | |
50 | /* |
51 | * The LM63 registers |
52 | */ |
53 | |
54 | #define LM63_REG_CONFIG1 0x03 |
55 | #define LM63_REG_CONVRATE 0x04 |
56 | #define LM63_REG_CONFIG2 0xBF |
57 | #define LM63_REG_CONFIG_FAN 0x4A |
58 | |
59 | #define LM63_REG_TACH_COUNT_MSB 0x47 |
60 | #define LM63_REG_TACH_COUNT_LSB 0x46 |
61 | #define LM63_REG_TACH_LIMIT_MSB 0x49 |
62 | #define LM63_REG_TACH_LIMIT_LSB 0x48 |
63 | |
64 | #define LM63_REG_PWM_VALUE 0x4C |
65 | #define LM63_REG_PWM_FREQ 0x4D |
66 | #define LM63_REG_LUT_TEMP_HYST 0x4F |
67 | #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) |
68 | #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) |
69 | |
70 | #define LM63_REG_LOCAL_TEMP 0x00 |
71 | #define LM63_REG_LOCAL_HIGH 0x05 |
72 | |
73 | #define LM63_REG_REMOTE_TEMP_MSB 0x01 |
74 | #define LM63_REG_REMOTE_TEMP_LSB 0x10 |
75 | #define LM63_REG_REMOTE_OFFSET_MSB 0x11 |
76 | #define LM63_REG_REMOTE_OFFSET_LSB 0x12 |
77 | #define LM63_REG_REMOTE_HIGH_MSB 0x07 |
78 | #define LM63_REG_REMOTE_HIGH_LSB 0x13 |
79 | #define LM63_REG_REMOTE_LOW_MSB 0x08 |
80 | #define LM63_REG_REMOTE_LOW_LSB 0x14 |
81 | #define LM63_REG_REMOTE_TCRIT 0x19 |
82 | #define LM63_REG_REMOTE_TCRIT_HYST 0x21 |
83 | |
84 | #define LM63_REG_ALERT_STATUS 0x02 |
85 | #define LM63_REG_ALERT_MASK 0x16 |
86 | |
87 | #define LM63_REG_MAN_ID 0xFE |
88 | #define LM63_REG_CHIP_ID 0xFF |
89 | |
90 | #define LM96163_REG_TRUTHERM 0x30 |
91 | #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 |
92 | #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 |
93 | #define LM96163_REG_CONFIG_ENHANCED 0x45 |
94 | |
95 | #define LM63_MAX_CONVRATE 9 |
96 | |
97 | #define LM63_MAX_CONVRATE_HZ 32 |
98 | #define LM96163_MAX_CONVRATE_HZ 26 |
99 | |
100 | /* |
101 | * Conversions and various macros |
102 | * For tachometer counts, the LM63 uses 16-bit values. |
103 | * For local temperature and high limit, remote critical limit and hysteresis |
104 | * value, it uses signed 8-bit values with LSB = 1 degree Celsius. |
105 | * For remote temperature, low and high limits, it uses signed 11-bit values |
106 | * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. |
107 | * For LM64 the actual remote diode temperature is 16 degree Celsius higher |
108 | * than the register reading. Remote temperature setpoints have to be |
109 | * adapted accordingly. |
110 | */ |
111 | |
112 | #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ |
113 | 5400000 / (reg)) |
114 | #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ |
115 | (5400000 / (val)) & 0xFFFC) |
116 | #define TEMP8_FROM_REG(reg) ((reg) * 1000) |
117 | #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ |
118 | 127000), 1000) |
119 | #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \ |
120 | 255000), 1000) |
121 | #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) |
122 | #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ |
123 | 127875), 125) * 32) |
124 | #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \ |
125 | 255875), 125) * 32) |
126 | #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \ |
127 | 1000) |
128 | |
129 | #define UPDATE_INTERVAL(max, rate) \ |
130 | ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) |
131 | |
132 | enum chips { lm63, lm64, lm96163 }; |
133 | |
134 | /* |
135 | * Client data (each client gets its own) |
136 | */ |
137 | |
138 | struct lm63_data { |
139 | struct i2c_client *client; |
140 | struct mutex update_lock; |
141 | const struct attribute_group *groups[5]; |
142 | bool valid; /* false until following fields are valid */ |
143 | char lut_valid; /* zero until lut fields are valid */ |
144 | unsigned long last_updated; /* in jiffies */ |
145 | unsigned long lut_last_updated; /* in jiffies */ |
146 | enum chips kind; |
147 | int temp2_offset; |
148 | |
149 | int update_interval; /* in milliseconds */ |
150 | int max_convrate_hz; |
151 | int lut_size; /* 8 or 12 */ |
152 | |
153 | /* registers values */ |
154 | u8 config, config_fan; |
155 | u16 fan[2]; /* 0: input |
156 | 1: low limit */ |
157 | u8 pwm1_freq; |
158 | u8 pwm1[13]; /* 0: current output |
159 | 1-12: lookup table */ |
160 | s8 temp8[15]; /* 0: local input |
161 | 1: local high limit |
162 | 2: remote critical limit |
163 | 3-14: lookup table */ |
164 | s16 temp11[4]; /* 0: remote input |
165 | 1: remote low limit |
166 | 2: remote high limit |
167 | 3: remote offset */ |
168 | u16 temp11u; /* remote input (unsigned) */ |
169 | u8 temp2_crit_hyst; |
170 | u8 lut_temp_hyst; |
171 | u8 alarms; |
172 | bool pwm_highres; |
173 | bool lut_temp_highres; |
174 | bool remote_unsigned; /* true if unsigned remote upper limits */ |
175 | bool trutherm; |
176 | }; |
177 | |
178 | static inline int temp8_from_reg(struct lm63_data *data, int nr) |
179 | { |
180 | if (data->remote_unsigned) |
181 | return TEMP8_FROM_REG((u8)data->temp8[nr]); |
182 | return TEMP8_FROM_REG(data->temp8[nr]); |
183 | } |
184 | |
185 | static inline int lut_temp_from_reg(struct lm63_data *data, int nr) |
186 | { |
187 | return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); |
188 | } |
189 | |
190 | static inline int lut_temp_to_reg(struct lm63_data *data, long val) |
191 | { |
192 | val -= data->temp2_offset; |
193 | if (data->lut_temp_highres) |
194 | return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); |
195 | else |
196 | return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); |
197 | } |
198 | |
199 | /* |
200 | * Update the lookup table register cache. |
201 | * client->update_lock must be held when calling this function. |
202 | */ |
203 | static void lm63_update_lut(struct lm63_data *data) |
204 | { |
205 | struct i2c_client *client = data->client; |
206 | int i; |
207 | |
208 | if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || |
209 | !data->lut_valid) { |
210 | for (i = 0; i < data->lut_size; i++) { |
211 | data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, |
212 | LM63_REG_LUT_PWM(i)); |
213 | data->temp8[3 + i] = i2c_smbus_read_byte_data(client, |
214 | LM63_REG_LUT_TEMP(i)); |
215 | } |
216 | data->lut_temp_hyst = i2c_smbus_read_byte_data(client, |
217 | LM63_REG_LUT_TEMP_HYST); |
218 | |
219 | data->lut_last_updated = jiffies; |
220 | data->lut_valid = 1; |
221 | } |
222 | } |
223 | |
224 | static struct lm63_data *lm63_update_device(struct device *dev) |
225 | { |
226 | struct lm63_data *data = dev_get_drvdata(dev); |
227 | struct i2c_client *client = data->client; |
228 | unsigned long next_update; |
229 | |
230 | mutex_lock(&data->update_lock); |
231 | |
232 | next_update = data->last_updated + |
233 | msecs_to_jiffies(m: data->update_interval); |
234 | if (time_after(jiffies, next_update) || !data->valid) { |
235 | if (data->config & 0x04) { /* tachometer enabled */ |
236 | /* order matters for fan1_input */ |
237 | data->fan[0] = i2c_smbus_read_byte_data(client, |
238 | LM63_REG_TACH_COUNT_LSB) & 0xFC; |
239 | data->fan[0] |= i2c_smbus_read_byte_data(client, |
240 | LM63_REG_TACH_COUNT_MSB) << 8; |
241 | data->fan[1] = (i2c_smbus_read_byte_data(client, |
242 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) |
243 | | (i2c_smbus_read_byte_data(client, |
244 | LM63_REG_TACH_LIMIT_MSB) << 8); |
245 | } |
246 | |
247 | data->pwm1_freq = i2c_smbus_read_byte_data(client, |
248 | LM63_REG_PWM_FREQ); |
249 | if (data->pwm1_freq == 0) |
250 | data->pwm1_freq = 1; |
251 | data->pwm1[0] = i2c_smbus_read_byte_data(client, |
252 | LM63_REG_PWM_VALUE); |
253 | |
254 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
255 | LM63_REG_LOCAL_TEMP); |
256 | data->temp8[1] = i2c_smbus_read_byte_data(client, |
257 | LM63_REG_LOCAL_HIGH); |
258 | |
259 | /* order matters for temp2_input */ |
260 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
261 | LM63_REG_REMOTE_TEMP_MSB) << 8; |
262 | data->temp11[0] |= i2c_smbus_read_byte_data(client, |
263 | LM63_REG_REMOTE_TEMP_LSB); |
264 | data->temp11[1] = (i2c_smbus_read_byte_data(client, |
265 | LM63_REG_REMOTE_LOW_MSB) << 8) |
266 | | i2c_smbus_read_byte_data(client, |
267 | LM63_REG_REMOTE_LOW_LSB); |
268 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
269 | LM63_REG_REMOTE_HIGH_MSB) << 8) |
270 | | i2c_smbus_read_byte_data(client, |
271 | LM63_REG_REMOTE_HIGH_LSB); |
272 | data->temp11[3] = (i2c_smbus_read_byte_data(client, |
273 | LM63_REG_REMOTE_OFFSET_MSB) << 8) |
274 | | i2c_smbus_read_byte_data(client, |
275 | LM63_REG_REMOTE_OFFSET_LSB); |
276 | |
277 | if (data->kind == lm96163) |
278 | data->temp11u = (i2c_smbus_read_byte_data(client, |
279 | LM96163_REG_REMOTE_TEMP_U_MSB) << 8) |
280 | | i2c_smbus_read_byte_data(client, |
281 | LM96163_REG_REMOTE_TEMP_U_LSB); |
282 | |
283 | data->temp8[2] = i2c_smbus_read_byte_data(client, |
284 | LM63_REG_REMOTE_TCRIT); |
285 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
286 | LM63_REG_REMOTE_TCRIT_HYST); |
287 | |
288 | data->alarms = i2c_smbus_read_byte_data(client, |
289 | LM63_REG_ALERT_STATUS) & 0x7F; |
290 | |
291 | data->last_updated = jiffies; |
292 | data->valid = true; |
293 | } |
294 | |
295 | lm63_update_lut(data); |
296 | |
297 | mutex_unlock(lock: &data->update_lock); |
298 | |
299 | return data; |
300 | } |
301 | |
302 | /* |
303 | * Trip points in the lookup table should be in ascending order for both |
304 | * temperatures and PWM output values. |
305 | */ |
306 | static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) |
307 | { |
308 | int i; |
309 | |
310 | mutex_lock(&data->update_lock); |
311 | lm63_update_lut(data); |
312 | |
313 | for (i = 1; i < data->lut_size; i++) { |
314 | if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] |
315 | || data->temp8[3 + i - 1] > data->temp8[3 + i]) { |
316 | dev_warn(dev, |
317 | "Lookup table doesn't look sane (check entries %d and %d)\n" , |
318 | i, i + 1); |
319 | break; |
320 | } |
321 | } |
322 | mutex_unlock(lock: &data->update_lock); |
323 | |
324 | return i == data->lut_size ? 0 : 1; |
325 | } |
326 | |
327 | /* |
328 | * Sysfs callback functions and files |
329 | */ |
330 | |
331 | static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, |
332 | char *buf) |
333 | { |
334 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
335 | struct lm63_data *data = lm63_update_device(dev); |
336 | return sprintf(buf, fmt: "%d\n" , FAN_FROM_REG(data->fan[attr->index])); |
337 | } |
338 | |
339 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
340 | const char *buf, size_t count) |
341 | { |
342 | struct lm63_data *data = dev_get_drvdata(dev); |
343 | struct i2c_client *client = data->client; |
344 | unsigned long val; |
345 | int err; |
346 | |
347 | err = kstrtoul(s: buf, base: 10, res: &val); |
348 | if (err) |
349 | return err; |
350 | |
351 | mutex_lock(&data->update_lock); |
352 | data->fan[1] = FAN_TO_REG(val); |
353 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
354 | value: data->fan[1] & 0xFF); |
355 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
356 | value: data->fan[1] >> 8); |
357 | mutex_unlock(lock: &data->update_lock); |
358 | return count; |
359 | } |
360 | |
361 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, |
362 | char *buf) |
363 | { |
364 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
365 | struct lm63_data *data = lm63_update_device(dev); |
366 | int nr = attr->index; |
367 | int pwm; |
368 | |
369 | if (data->pwm_highres) |
370 | pwm = data->pwm1[nr]; |
371 | else |
372 | pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? |
373 | 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / |
374 | (2 * data->pwm1_freq); |
375 | |
376 | return sprintf(buf, fmt: "%d\n" , pwm); |
377 | } |
378 | |
379 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, |
380 | const char *buf, size_t count) |
381 | { |
382 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
383 | struct lm63_data *data = dev_get_drvdata(dev); |
384 | struct i2c_client *client = data->client; |
385 | int nr = attr->index; |
386 | unsigned long val; |
387 | int err; |
388 | u8 reg; |
389 | |
390 | if (!(data->config_fan & 0x20)) /* register is read-only */ |
391 | return -EPERM; |
392 | |
393 | err = kstrtoul(s: buf, base: 10, res: &val); |
394 | if (err) |
395 | return err; |
396 | |
397 | reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; |
398 | val = clamp_val(val, 0, 255); |
399 | |
400 | mutex_lock(&data->update_lock); |
401 | data->pwm1[nr] = data->pwm_highres ? val : |
402 | (val * data->pwm1_freq * 2 + 127) / 255; |
403 | i2c_smbus_write_byte_data(client, command: reg, value: data->pwm1[nr]); |
404 | mutex_unlock(lock: &data->update_lock); |
405 | return count; |
406 | } |
407 | |
408 | static ssize_t pwm1_enable_show(struct device *dev, |
409 | struct device_attribute *dummy, char *buf) |
410 | { |
411 | struct lm63_data *data = lm63_update_device(dev); |
412 | return sprintf(buf, fmt: "%d\n" , data->config_fan & 0x20 ? 1 : 2); |
413 | } |
414 | |
415 | static ssize_t pwm1_enable_store(struct device *dev, |
416 | struct device_attribute *dummy, |
417 | const char *buf, size_t count) |
418 | { |
419 | struct lm63_data *data = dev_get_drvdata(dev); |
420 | struct i2c_client *client = data->client; |
421 | unsigned long val; |
422 | int err; |
423 | |
424 | err = kstrtoul(s: buf, base: 10, res: &val); |
425 | if (err) |
426 | return err; |
427 | if (val < 1 || val > 2) |
428 | return -EINVAL; |
429 | |
430 | /* |
431 | * Only let the user switch to automatic mode if the lookup table |
432 | * looks sane. |
433 | */ |
434 | if (val == 2 && lm63_lut_looks_bad(dev, data)) |
435 | return -EPERM; |
436 | |
437 | mutex_lock(&data->update_lock); |
438 | data->config_fan = i2c_smbus_read_byte_data(client, |
439 | LM63_REG_CONFIG_FAN); |
440 | if (val == 1) |
441 | data->config_fan |= 0x20; |
442 | else |
443 | data->config_fan &= ~0x20; |
444 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, |
445 | value: data->config_fan); |
446 | mutex_unlock(lock: &data->update_lock); |
447 | return count; |
448 | } |
449 | |
450 | /* |
451 | * There are 8bit registers for both local(temp1) and remote(temp2) sensor. |
452 | * For remote sensor registers temp2_offset has to be considered, |
453 | * for local sensor it must not. |
454 | * So we need separate 8bit accessors for local and remote sensor. |
455 | */ |
456 | static ssize_t show_local_temp8(struct device *dev, |
457 | struct device_attribute *devattr, |
458 | char *buf) |
459 | { |
460 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
461 | struct lm63_data *data = lm63_update_device(dev); |
462 | return sprintf(buf, fmt: "%d\n" , TEMP8_FROM_REG(data->temp8[attr->index])); |
463 | } |
464 | |
465 | static ssize_t show_remote_temp8(struct device *dev, |
466 | struct device_attribute *devattr, |
467 | char *buf) |
468 | { |
469 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
470 | struct lm63_data *data = lm63_update_device(dev); |
471 | return sprintf(buf, fmt: "%d\n" , temp8_from_reg(data, nr: attr->index) |
472 | + data->temp2_offset); |
473 | } |
474 | |
475 | static ssize_t show_lut_temp(struct device *dev, |
476 | struct device_attribute *devattr, |
477 | char *buf) |
478 | { |
479 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
480 | struct lm63_data *data = lm63_update_device(dev); |
481 | return sprintf(buf, fmt: "%d\n" , lut_temp_from_reg(data, nr: attr->index) |
482 | + data->temp2_offset); |
483 | } |
484 | |
485 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, |
486 | const char *buf, size_t count) |
487 | { |
488 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
489 | struct lm63_data *data = dev_get_drvdata(dev); |
490 | struct i2c_client *client = data->client; |
491 | int nr = attr->index; |
492 | long val; |
493 | int err; |
494 | int temp; |
495 | u8 reg; |
496 | |
497 | err = kstrtol(s: buf, base: 10, res: &val); |
498 | if (err) |
499 | return err; |
500 | |
501 | mutex_lock(&data->update_lock); |
502 | switch (nr) { |
503 | case 2: |
504 | reg = LM63_REG_REMOTE_TCRIT; |
505 | if (data->remote_unsigned) |
506 | temp = TEMP8U_TO_REG(val - data->temp2_offset); |
507 | else |
508 | temp = TEMP8_TO_REG(val - data->temp2_offset); |
509 | break; |
510 | case 1: |
511 | reg = LM63_REG_LOCAL_HIGH; |
512 | temp = TEMP8_TO_REG(val); |
513 | break; |
514 | default: /* lookup table */ |
515 | reg = LM63_REG_LUT_TEMP(nr - 3); |
516 | temp = lut_temp_to_reg(data, val); |
517 | } |
518 | data->temp8[nr] = temp; |
519 | i2c_smbus_write_byte_data(client, command: reg, value: temp); |
520 | mutex_unlock(lock: &data->update_lock); |
521 | return count; |
522 | } |
523 | |
524 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, |
525 | char *buf) |
526 | { |
527 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
528 | struct lm63_data *data = lm63_update_device(dev); |
529 | int nr = attr->index; |
530 | int temp; |
531 | |
532 | if (!nr) { |
533 | /* |
534 | * Use unsigned temperature unless its value is zero. |
535 | * If it is zero, use signed temperature. |
536 | */ |
537 | if (data->temp11u) |
538 | temp = TEMP11_FROM_REG(data->temp11u); |
539 | else |
540 | temp = TEMP11_FROM_REG(data->temp11[nr]); |
541 | } else { |
542 | if (data->remote_unsigned && nr == 2) |
543 | temp = TEMP11_FROM_REG((u16)data->temp11[nr]); |
544 | else |
545 | temp = TEMP11_FROM_REG(data->temp11[nr]); |
546 | } |
547 | return sprintf(buf, fmt: "%d\n" , temp + data->temp2_offset); |
548 | } |
549 | |
550 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, |
551 | const char *buf, size_t count) |
552 | { |
553 | static const u8 reg[6] = { |
554 | LM63_REG_REMOTE_LOW_MSB, |
555 | LM63_REG_REMOTE_LOW_LSB, |
556 | LM63_REG_REMOTE_HIGH_MSB, |
557 | LM63_REG_REMOTE_HIGH_LSB, |
558 | LM63_REG_REMOTE_OFFSET_MSB, |
559 | LM63_REG_REMOTE_OFFSET_LSB, |
560 | }; |
561 | |
562 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
563 | struct lm63_data *data = dev_get_drvdata(dev); |
564 | struct i2c_client *client = data->client; |
565 | long val; |
566 | int err; |
567 | int nr = attr->index; |
568 | |
569 | err = kstrtol(s: buf, base: 10, res: &val); |
570 | if (err) |
571 | return err; |
572 | |
573 | mutex_lock(&data->update_lock); |
574 | if (data->remote_unsigned && nr == 2) |
575 | data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); |
576 | else |
577 | data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); |
578 | |
579 | i2c_smbus_write_byte_data(client, command: reg[(nr - 1) * 2], |
580 | value: data->temp11[nr] >> 8); |
581 | i2c_smbus_write_byte_data(client, command: reg[(nr - 1) * 2 + 1], |
582 | value: data->temp11[nr] & 0xff); |
583 | mutex_unlock(lock: &data->update_lock); |
584 | return count; |
585 | } |
586 | |
587 | /* |
588 | * Hysteresis register holds a relative value, while we want to present |
589 | * an absolute to user-space |
590 | */ |
591 | static ssize_t temp2_crit_hyst_show(struct device *dev, |
592 | struct device_attribute *dummy, char *buf) |
593 | { |
594 | struct lm63_data *data = lm63_update_device(dev); |
595 | return sprintf(buf, fmt: "%d\n" , temp8_from_reg(data, nr: 2) |
596 | + data->temp2_offset |
597 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
598 | } |
599 | |
600 | static ssize_t show_lut_temp_hyst(struct device *dev, |
601 | struct device_attribute *devattr, char *buf) |
602 | { |
603 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
604 | struct lm63_data *data = lm63_update_device(dev); |
605 | |
606 | return sprintf(buf, fmt: "%d\n" , lut_temp_from_reg(data, nr: attr->index) |
607 | + data->temp2_offset |
608 | - TEMP8_FROM_REG(data->lut_temp_hyst)); |
609 | } |
610 | |
611 | /* |
612 | * And now the other way around, user-space provides an absolute |
613 | * hysteresis value and we have to store a relative one |
614 | */ |
615 | static ssize_t temp2_crit_hyst_store(struct device *dev, |
616 | struct device_attribute *dummy, |
617 | const char *buf, size_t count) |
618 | { |
619 | struct lm63_data *data = dev_get_drvdata(dev); |
620 | struct i2c_client *client = data->client; |
621 | long val; |
622 | int err; |
623 | long hyst; |
624 | |
625 | err = kstrtol(s: buf, base: 10, res: &val); |
626 | if (err) |
627 | return err; |
628 | |
629 | mutex_lock(&data->update_lock); |
630 | hyst = temp8_from_reg(data, nr: 2) + data->temp2_offset - val; |
631 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
632 | HYST_TO_REG(hyst)); |
633 | mutex_unlock(lock: &data->update_lock); |
634 | return count; |
635 | } |
636 | |
637 | /* |
638 | * Set conversion rate. |
639 | * client->update_lock must be held when calling this function. |
640 | */ |
641 | static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) |
642 | { |
643 | struct i2c_client *client = data->client; |
644 | unsigned int update_interval; |
645 | int i; |
646 | |
647 | /* Shift calculations to avoid rounding errors */ |
648 | interval <<= 6; |
649 | |
650 | /* find the nearest update rate */ |
651 | update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 |
652 | / data->max_convrate_hz; |
653 | for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) |
654 | if (interval >= update_interval * 3 / 4) |
655 | break; |
656 | |
657 | i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, value: i); |
658 | data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); |
659 | } |
660 | |
661 | static ssize_t update_interval_show(struct device *dev, |
662 | struct device_attribute *attr, char *buf) |
663 | { |
664 | struct lm63_data *data = dev_get_drvdata(dev); |
665 | |
666 | return sprintf(buf, fmt: "%u\n" , data->update_interval); |
667 | } |
668 | |
669 | static ssize_t update_interval_store(struct device *dev, |
670 | struct device_attribute *attr, |
671 | const char *buf, size_t count) |
672 | { |
673 | struct lm63_data *data = dev_get_drvdata(dev); |
674 | unsigned long val; |
675 | int err; |
676 | |
677 | err = kstrtoul(s: buf, base: 10, res: &val); |
678 | if (err) |
679 | return err; |
680 | |
681 | mutex_lock(&data->update_lock); |
682 | lm63_set_convrate(data, clamp_val(val, 0, 100000)); |
683 | mutex_unlock(lock: &data->update_lock); |
684 | |
685 | return count; |
686 | } |
687 | |
688 | static ssize_t temp2_type_show(struct device *dev, |
689 | struct device_attribute *attr, char *buf) |
690 | { |
691 | struct lm63_data *data = dev_get_drvdata(dev); |
692 | |
693 | return sprintf(buf, fmt: data->trutherm ? "1\n" : "2\n" ); |
694 | } |
695 | |
696 | static ssize_t temp2_type_store(struct device *dev, |
697 | struct device_attribute *attr, |
698 | const char *buf, size_t count) |
699 | { |
700 | struct lm63_data *data = dev_get_drvdata(dev); |
701 | struct i2c_client *client = data->client; |
702 | unsigned long val; |
703 | int ret; |
704 | u8 reg; |
705 | |
706 | ret = kstrtoul(s: buf, base: 10, res: &val); |
707 | if (ret < 0) |
708 | return ret; |
709 | if (val != 1 && val != 2) |
710 | return -EINVAL; |
711 | |
712 | mutex_lock(&data->update_lock); |
713 | data->trutherm = val == 1; |
714 | reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; |
715 | i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, |
716 | value: reg | (data->trutherm ? 0x02 : 0x00)); |
717 | data->valid = false; |
718 | mutex_unlock(lock: &data->update_lock); |
719 | |
720 | return count; |
721 | } |
722 | |
723 | static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, |
724 | char *buf) |
725 | { |
726 | struct lm63_data *data = lm63_update_device(dev); |
727 | return sprintf(buf, fmt: "%u\n" , data->alarms); |
728 | } |
729 | |
730 | static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, |
731 | char *buf) |
732 | { |
733 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
734 | struct lm63_data *data = lm63_update_device(dev); |
735 | int bitnr = attr->index; |
736 | |
737 | return sprintf(buf, fmt: "%u\n" , (data->alarms >> bitnr) & 1); |
738 | } |
739 | |
740 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
741 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, |
742 | set_fan, 1); |
743 | |
744 | static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); |
745 | static DEVICE_ATTR_RW(pwm1_enable); |
746 | static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, |
747 | show_pwm1, set_pwm1, 1); |
748 | static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, |
749 | show_lut_temp, set_temp8, 3); |
750 | static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, |
751 | show_lut_temp_hyst, NULL, 3); |
752 | static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, |
753 | show_pwm1, set_pwm1, 2); |
754 | static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, |
755 | show_lut_temp, set_temp8, 4); |
756 | static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, |
757 | show_lut_temp_hyst, NULL, 4); |
758 | static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, |
759 | show_pwm1, set_pwm1, 3); |
760 | static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, |
761 | show_lut_temp, set_temp8, 5); |
762 | static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, |
763 | show_lut_temp_hyst, NULL, 5); |
764 | static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, |
765 | show_pwm1, set_pwm1, 4); |
766 | static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, |
767 | show_lut_temp, set_temp8, 6); |
768 | static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, |
769 | show_lut_temp_hyst, NULL, 6); |
770 | static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, |
771 | show_pwm1, set_pwm1, 5); |
772 | static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, |
773 | show_lut_temp, set_temp8, 7); |
774 | static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, |
775 | show_lut_temp_hyst, NULL, 7); |
776 | static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, |
777 | show_pwm1, set_pwm1, 6); |
778 | static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, |
779 | show_lut_temp, set_temp8, 8); |
780 | static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, |
781 | show_lut_temp_hyst, NULL, 8); |
782 | static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, |
783 | show_pwm1, set_pwm1, 7); |
784 | static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, |
785 | show_lut_temp, set_temp8, 9); |
786 | static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, |
787 | show_lut_temp_hyst, NULL, 9); |
788 | static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, |
789 | show_pwm1, set_pwm1, 8); |
790 | static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, |
791 | show_lut_temp, set_temp8, 10); |
792 | static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, |
793 | show_lut_temp_hyst, NULL, 10); |
794 | static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, |
795 | show_pwm1, set_pwm1, 9); |
796 | static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, |
797 | show_lut_temp, set_temp8, 11); |
798 | static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, |
799 | show_lut_temp_hyst, NULL, 11); |
800 | static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, |
801 | show_pwm1, set_pwm1, 10); |
802 | static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, |
803 | show_lut_temp, set_temp8, 12); |
804 | static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, |
805 | show_lut_temp_hyst, NULL, 12); |
806 | static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, |
807 | show_pwm1, set_pwm1, 11); |
808 | static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, |
809 | show_lut_temp, set_temp8, 13); |
810 | static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, |
811 | show_lut_temp_hyst, NULL, 13); |
812 | static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, |
813 | show_pwm1, set_pwm1, 12); |
814 | static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, |
815 | show_lut_temp, set_temp8, 14); |
816 | static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, |
817 | show_lut_temp_hyst, NULL, 14); |
818 | |
819 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); |
820 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, |
821 | set_temp8, 1); |
822 | |
823 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
824 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
825 | set_temp11, 1); |
826 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
827 | set_temp11, 2); |
828 | static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
829 | set_temp11, 3); |
830 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, |
831 | set_temp8, 2); |
832 | static DEVICE_ATTR_RW(temp2_crit_hyst); |
833 | |
834 | static DEVICE_ATTR_RW(temp2_type); |
835 | |
836 | /* Individual alarm files */ |
837 | static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); |
838 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); |
839 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
840 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
841 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); |
842 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); |
843 | /* Raw alarm file for compatibility */ |
844 | static DEVICE_ATTR_RO(alarms); |
845 | |
846 | static DEVICE_ATTR_RW(update_interval); |
847 | |
848 | static struct attribute *lm63_attributes[] = { |
849 | &sensor_dev_attr_pwm1.dev_attr.attr, |
850 | &dev_attr_pwm1_enable.attr, |
851 | &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, |
852 | &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, |
853 | &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, |
854 | &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, |
855 | &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, |
856 | &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, |
857 | &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, |
858 | &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, |
859 | &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, |
860 | &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, |
861 | &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, |
862 | &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, |
863 | &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, |
864 | &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, |
865 | &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, |
866 | &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, |
867 | &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, |
868 | &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, |
869 | &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, |
870 | &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, |
871 | &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, |
872 | &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, |
873 | &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, |
874 | &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, |
875 | |
876 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
877 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
878 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
879 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
880 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
881 | &sensor_dev_attr_temp2_offset.dev_attr.attr, |
882 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
883 | &dev_attr_temp2_crit_hyst.attr, |
884 | |
885 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
886 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
887 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
888 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
889 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
890 | &dev_attr_alarms.attr, |
891 | &dev_attr_update_interval.attr, |
892 | NULL |
893 | }; |
894 | |
895 | static struct attribute *lm63_attributes_temp2_type[] = { |
896 | &dev_attr_temp2_type.attr, |
897 | NULL |
898 | }; |
899 | |
900 | static const struct attribute_group lm63_group_temp2_type = { |
901 | .attrs = lm63_attributes_temp2_type, |
902 | }; |
903 | |
904 | static struct attribute *[] = { |
905 | &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, |
906 | &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, |
907 | &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, |
908 | &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, |
909 | &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, |
910 | &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, |
911 | &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, |
912 | &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, |
913 | &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, |
914 | &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, |
915 | &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, |
916 | &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, |
917 | NULL |
918 | }; |
919 | |
920 | static const struct attribute_group = { |
921 | .attrs = lm63_attributes_extra_lut, |
922 | }; |
923 | |
924 | /* |
925 | * On LM63, temp2_crit can be set only once, which should be job |
926 | * of the bootloader. |
927 | * On LM64, temp2_crit can always be set. |
928 | * On LM96163, temp2_crit can be set if bit 1 of the configuration |
929 | * register is true. |
930 | */ |
931 | static umode_t lm63_attribute_mode(struct kobject *kobj, |
932 | struct attribute *attr, int index) |
933 | { |
934 | struct device *dev = kobj_to_dev(kobj); |
935 | struct lm63_data *data = dev_get_drvdata(dev); |
936 | |
937 | if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr |
938 | && (data->kind == lm64 || |
939 | (data->kind == lm96163 && (data->config & 0x02)))) |
940 | return attr->mode | S_IWUSR; |
941 | |
942 | return attr->mode; |
943 | } |
944 | |
945 | static const struct attribute_group lm63_group = { |
946 | .is_visible = lm63_attribute_mode, |
947 | .attrs = lm63_attributes, |
948 | }; |
949 | |
950 | static struct attribute *lm63_attributes_fan1[] = { |
951 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
952 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
953 | |
954 | &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, |
955 | NULL |
956 | }; |
957 | |
958 | static const struct attribute_group lm63_group_fan1 = { |
959 | .attrs = lm63_attributes_fan1, |
960 | }; |
961 | |
962 | /* |
963 | * Real code |
964 | */ |
965 | |
966 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
967 | static int lm63_detect(struct i2c_client *client, |
968 | struct i2c_board_info *info) |
969 | { |
970 | struct i2c_adapter *adapter = client->adapter; |
971 | u8 man_id, chip_id, reg_config1, reg_config2; |
972 | u8 reg_alert_status, reg_alert_mask; |
973 | int address = client->addr; |
974 | |
975 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
976 | return -ENODEV; |
977 | |
978 | man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); |
979 | chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); |
980 | |
981 | reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); |
982 | reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); |
983 | reg_alert_status = i2c_smbus_read_byte_data(client, |
984 | LM63_REG_ALERT_STATUS); |
985 | reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); |
986 | |
987 | if (man_id != 0x01 /* National Semiconductor */ |
988 | || (reg_config1 & 0x18) != 0x00 |
989 | || (reg_config2 & 0xF8) != 0x00 |
990 | || (reg_alert_status & 0x20) != 0x00 |
991 | || (reg_alert_mask & 0xA4) != 0xA4) { |
992 | dev_dbg(&adapter->dev, |
993 | "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n" , |
994 | man_id, chip_id); |
995 | return -ENODEV; |
996 | } |
997 | |
998 | if (chip_id == 0x41 && address == 0x4c) |
999 | strscpy(p: info->type, q: "lm63" , I2C_NAME_SIZE); |
1000 | else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) |
1001 | strscpy(p: info->type, q: "lm64" , I2C_NAME_SIZE); |
1002 | else if (chip_id == 0x49 && address == 0x4c) |
1003 | strscpy(p: info->type, q: "lm96163" , I2C_NAME_SIZE); |
1004 | else |
1005 | return -ENODEV; |
1006 | |
1007 | return 0; |
1008 | } |
1009 | |
1010 | /* |
1011 | * Ideally we shouldn't have to initialize anything, since the BIOS |
1012 | * should have taken care of everything |
1013 | */ |
1014 | static void lm63_init_client(struct lm63_data *data) |
1015 | { |
1016 | struct i2c_client *client = data->client; |
1017 | struct device *dev = &client->dev; |
1018 | u8 convrate; |
1019 | |
1020 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); |
1021 | data->config_fan = i2c_smbus_read_byte_data(client, |
1022 | LM63_REG_CONFIG_FAN); |
1023 | |
1024 | /* Start converting if needed */ |
1025 | if (data->config & 0x40) { /* standby */ |
1026 | dev_dbg(dev, "Switching to operational mode\n" ); |
1027 | data->config &= 0xA7; |
1028 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, |
1029 | value: data->config); |
1030 | } |
1031 | /* Tachometer is always enabled on LM64 */ |
1032 | if (data->kind == lm64) |
1033 | data->config |= 0x04; |
1034 | |
1035 | /* We may need pwm1_freq before ever updating the client data */ |
1036 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); |
1037 | if (data->pwm1_freq == 0) |
1038 | data->pwm1_freq = 1; |
1039 | |
1040 | switch (data->kind) { |
1041 | case lm63: |
1042 | case lm64: |
1043 | data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; |
1044 | data->lut_size = 8; |
1045 | break; |
1046 | case lm96163: |
1047 | data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; |
1048 | data->lut_size = 12; |
1049 | data->trutherm |
1050 | = i2c_smbus_read_byte_data(client, |
1051 | LM96163_REG_TRUTHERM) & 0x02; |
1052 | break; |
1053 | } |
1054 | convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); |
1055 | if (unlikely(convrate > LM63_MAX_CONVRATE)) |
1056 | convrate = LM63_MAX_CONVRATE; |
1057 | data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, |
1058 | convrate); |
1059 | |
1060 | /* |
1061 | * For LM96163, check if high resolution PWM |
1062 | * and unsigned temperature format is enabled. |
1063 | */ |
1064 | if (data->kind == lm96163) { |
1065 | u8 config_enhanced |
1066 | = i2c_smbus_read_byte_data(client, |
1067 | LM96163_REG_CONFIG_ENHANCED); |
1068 | if (config_enhanced & 0x20) |
1069 | data->lut_temp_highres = true; |
1070 | if ((config_enhanced & 0x10) |
1071 | && !(data->config_fan & 0x08) && data->pwm1_freq == 8) |
1072 | data->pwm_highres = true; |
1073 | if (config_enhanced & 0x08) |
1074 | data->remote_unsigned = true; |
1075 | } |
1076 | |
1077 | /* Show some debug info about the LM63 configuration */ |
1078 | if (data->kind == lm63) |
1079 | dev_dbg(dev, "Alert/tach pin configured for %s\n" , |
1080 | (data->config & 0x04) ? "tachometer input" : |
1081 | "alert output" ); |
1082 | dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n" , |
1083 | (data->config_fan & 0x08) ? "1.4" : "360" , |
1084 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); |
1085 | dev_dbg(dev, "PWM output active %s, %s mode\n" , |
1086 | (data->config_fan & 0x10) ? "low" : "high" , |
1087 | (data->config_fan & 0x20) ? "manual" : "auto" ); |
1088 | } |
1089 | |
1090 | static const struct i2c_device_id lm63_id[]; |
1091 | |
1092 | static int lm63_probe(struct i2c_client *client) |
1093 | { |
1094 | struct device *dev = &client->dev; |
1095 | struct device *hwmon_dev; |
1096 | struct lm63_data *data; |
1097 | int groups = 0; |
1098 | |
1099 | data = devm_kzalloc(dev, size: sizeof(struct lm63_data), GFP_KERNEL); |
1100 | if (!data) |
1101 | return -ENOMEM; |
1102 | |
1103 | data->client = client; |
1104 | mutex_init(&data->update_lock); |
1105 | |
1106 | /* Set the device type */ |
1107 | if (client->dev.of_node) |
1108 | data->kind = (uintptr_t)of_device_get_match_data(dev: &client->dev); |
1109 | else |
1110 | data->kind = i2c_match_id(id: lm63_id, client)->driver_data; |
1111 | if (data->kind == lm64) |
1112 | data->temp2_offset = 16000; |
1113 | |
1114 | /* Initialize chip */ |
1115 | lm63_init_client(data); |
1116 | |
1117 | /* Register sysfs hooks */ |
1118 | data->groups[groups++] = &lm63_group; |
1119 | if (data->config & 0x04) /* tachometer enabled */ |
1120 | data->groups[groups++] = &lm63_group_fan1; |
1121 | |
1122 | if (data->kind == lm96163) { |
1123 | data->groups[groups++] = &lm63_group_temp2_type; |
1124 | data->groups[groups++] = &lm63_group_extra_lut; |
1125 | } |
1126 | |
1127 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, name: client->name, |
1128 | drvdata: data, groups: data->groups); |
1129 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
1130 | } |
1131 | |
1132 | /* |
1133 | * Driver data (common to all clients) |
1134 | */ |
1135 | |
1136 | static const struct i2c_device_id lm63_id[] = { |
1137 | { "lm63" , lm63 }, |
1138 | { "lm64" , lm64 }, |
1139 | { "lm96163" , lm96163 }, |
1140 | { } |
1141 | }; |
1142 | MODULE_DEVICE_TABLE(i2c, lm63_id); |
1143 | |
1144 | static const struct of_device_id __maybe_unused lm63_of_match[] = { |
1145 | { |
1146 | .compatible = "national,lm63" , |
1147 | .data = (void *)lm63 |
1148 | }, |
1149 | { |
1150 | .compatible = "national,lm64" , |
1151 | .data = (void *)lm64 |
1152 | }, |
1153 | { |
1154 | .compatible = "national,lm96163" , |
1155 | .data = (void *)lm96163 |
1156 | }, |
1157 | { }, |
1158 | }; |
1159 | MODULE_DEVICE_TABLE(of, lm63_of_match); |
1160 | |
1161 | static struct i2c_driver lm63_driver = { |
1162 | .class = I2C_CLASS_HWMON, |
1163 | .driver = { |
1164 | .name = "lm63" , |
1165 | .of_match_table = of_match_ptr(lm63_of_match), |
1166 | }, |
1167 | .probe = lm63_probe, |
1168 | .id_table = lm63_id, |
1169 | .detect = lm63_detect, |
1170 | .address_list = normal_i2c, |
1171 | }; |
1172 | |
1173 | module_i2c_driver(lm63_driver); |
1174 | |
1175 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>" ); |
1176 | MODULE_DESCRIPTION("LM63 driver" ); |
1177 | MODULE_LICENSE("GPL" ); |
1178 | |