1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * lm90.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring |
5 | * Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de> |
6 | * |
7 | * Based on the lm83 driver. The LM90 is a sensor chip made by National |
8 | * Semiconductor. It reports up to two temperatures (its own plus up to |
9 | * one external one) with a 0.125 deg resolution (1 deg for local |
10 | * temperature) and a 3-4 deg accuracy. |
11 | * |
12 | * This driver also supports the LM89 and LM99, two other sensor chips |
13 | * made by National Semiconductor. Both have an increased remote |
14 | * temperature measurement accuracy (1 degree), and the LM99 |
15 | * additionally shifts remote temperatures (measured and limits) by 16 |
16 | * degrees, which allows for higher temperatures measurement. |
17 | * Note that there is no way to differentiate between both chips. |
18 | * When device is auto-detected, the driver will assume an LM99. |
19 | * |
20 | * This driver also supports the LM86, another sensor chip made by |
21 | * National Semiconductor. It is exactly similar to the LM90 except it |
22 | * has a higher accuracy. |
23 | * |
24 | * This driver also supports the ADM1032, a sensor chip made by Analog |
25 | * Devices. That chip is similar to the LM90, with a few differences |
26 | * that are not handled by this driver. Among others, it has a higher |
27 | * accuracy than the LM90, much like the LM86 does. |
28 | * |
29 | * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor |
30 | * chips made by Maxim. These chips are similar to the LM86. |
31 | * Note that there is no easy way to differentiate between the three |
32 | * variants. We use the device address to detect MAX6659, which will result |
33 | * in a detection as max6657 if it is on address 0x4c. The extra address |
34 | * and features of the MAX6659 are only supported if the chip is configured |
35 | * explicitly as max6659, or if its address is not 0x4c. |
36 | * These chips lack the remote temperature offset feature. |
37 | * |
38 | * This driver also supports the MAX6654 chip made by Maxim. This chip can be |
39 | * at 9 different addresses, similar to MAX6680/MAX6681. The MAX6654 is similar |
40 | * to MAX6657/MAX6658/MAX6659, but does not support critical temperature |
41 | * limits. Extended range is available by setting the configuration register |
42 | * accordingly, and is done during initialization. Extended precision is only |
43 | * available at conversion rates of 1 Hz and slower. Note that extended |
44 | * precision is not enabled by default, as this driver initializes all chips |
45 | * to 2 Hz by design. The driver also supports MAX6690, which is practically |
46 | * identical to MAX6654. |
47 | * |
48 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
49 | * MAX6692 chips made by Maxim. These are again similar to the LM86, |
50 | * but they use unsigned temperature values and can report temperatures |
51 | * from 0 to 145 degrees. |
52 | * |
53 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
54 | * chips made by Maxim. These are quite similar to the other Maxim |
55 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
56 | * be treated identically. |
57 | * |
58 | * This driver also supports the MAX6695 and MAX6696, two other sensor |
59 | * chips made by Maxim. These are also quite similar to other Maxim |
60 | * chips, but support three temperature sensors instead of two. MAX6695 |
61 | * and MAX6696 only differ in the pinout so they can be treated identically. |
62 | * |
63 | * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as |
64 | * NCT1008 from ON Semiconductor. The chips are supported in both compatibility |
65 | * and extended mode. They are mostly compatible with LM90 except for a data |
66 | * format difference for the temperature value registers. |
67 | * |
68 | * This driver also supports ADT7481, ADT7482, and ADT7483 from Analog Devices |
69 | * / ON Semiconductor. The chips are similar to ADT7461 but support two external |
70 | * temperature sensors. |
71 | * |
72 | * This driver also supports NCT72, NCT214, and NCT218 from ON Semiconductor. |
73 | * The chips are similar to ADT7461/ADT7461A but have full PEC support |
74 | * (undocumented). |
75 | * |
76 | * This driver also supports the SA56004 from Philips. This device is |
77 | * pin-compatible with the LM86, the ED/EDP parts are also address-compatible. |
78 | * |
79 | * This driver also supports the G781 from GMT. This device is compatible |
80 | * with the ADM1032. |
81 | * |
82 | * This driver also supports TMP451 and TMP461 from Texas Instruments. |
83 | * Those devices are supported in both compatibility and extended mode. |
84 | * They are mostly compatible with ADT7461 except for local temperature |
85 | * low byte register and max conversion rate. |
86 | * |
87 | * This driver also supports MAX1617 and various clones such as G767 |
88 | * and NE1617. Such clones will be detected as MAX1617. |
89 | * |
90 | * This driver also supports NE1618 from Philips. It is similar to NE1617 |
91 | * but supports 11 bit external temperature values. |
92 | * |
93 | * Since the LM90 was the first chipset supported by this driver, most |
94 | * comments will refer to this chipset, but are actually general and |
95 | * concern all supported chipsets, unless mentioned otherwise. |
96 | */ |
97 | |
98 | #include <linux/bits.h> |
99 | #include <linux/device.h> |
100 | #include <linux/err.h> |
101 | #include <linux/i2c.h> |
102 | #include <linux/init.h> |
103 | #include <linux/interrupt.h> |
104 | #include <linux/jiffies.h> |
105 | #include <linux/hwmon.h> |
106 | #include <linux/kstrtox.h> |
107 | #include <linux/module.h> |
108 | #include <linux/mutex.h> |
109 | #include <linux/of.h> |
110 | #include <linux/regulator/consumer.h> |
111 | #include <linux/slab.h> |
112 | #include <linux/workqueue.h> |
113 | |
114 | /* The maximum number of channels currently supported */ |
115 | #define MAX_CHANNELS 3 |
116 | |
117 | /* |
118 | * Addresses to scan |
119 | * Address is fully defined internally and cannot be changed except for |
120 | * MAX6659, MAX6680 and MAX6681. |
121 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
122 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. |
123 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D |
124 | * have address 0x4d. |
125 | * MAX6647 has address 0x4e. |
126 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
127 | * MAX6654, MAX6680, and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, |
128 | * 0x2a, 0x2b, 0x4c, 0x4d or 0x4e. |
129 | * SA56004 can have address 0x48 through 0x4F. |
130 | */ |
131 | |
132 | static const unsigned short normal_i2c[] = { |
133 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
134 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; |
135 | |
136 | enum chips { adm1023, adm1032, adt7461, adt7461a, adt7481, |
137 | g781, lm84, lm90, lm99, |
138 | max1617, max6642, max6646, max6648, max6654, max6657, max6659, max6680, max6696, |
139 | nct210, nct72, ne1618, sa56004, tmp451, tmp461, w83l771, |
140 | }; |
141 | |
142 | /* |
143 | * The LM90 registers |
144 | */ |
145 | |
146 | #define LM90_REG_MAN_ID 0xFE |
147 | #define LM90_REG_CHIP_ID 0xFF |
148 | #define LM90_REG_CONFIG1 0x03 |
149 | #define LM90_REG_CONFIG2 0xBF |
150 | #define LM90_REG_CONVRATE 0x04 |
151 | #define LM90_REG_STATUS 0x02 |
152 | #define LM90_REG_LOCAL_TEMP 0x00 |
153 | #define LM90_REG_LOCAL_HIGH 0x05 |
154 | #define LM90_REG_LOCAL_LOW 0x06 |
155 | #define LM90_REG_LOCAL_CRIT 0x20 |
156 | #define LM90_REG_REMOTE_TEMPH 0x01 |
157 | #define LM90_REG_REMOTE_TEMPL 0x10 |
158 | #define LM90_REG_REMOTE_OFFSH 0x11 |
159 | #define LM90_REG_REMOTE_OFFSL 0x12 |
160 | #define LM90_REG_REMOTE_HIGHH 0x07 |
161 | #define LM90_REG_REMOTE_HIGHL 0x13 |
162 | #define LM90_REG_REMOTE_LOWH 0x08 |
163 | #define LM90_REG_REMOTE_LOWL 0x14 |
164 | #define LM90_REG_REMOTE_CRIT 0x19 |
165 | #define LM90_REG_TCRIT_HYST 0x21 |
166 | |
167 | /* MAX6646/6647/6649/6654/6657/6658/6659/6695/6696 registers */ |
168 | |
169 | #define MAX6657_REG_LOCAL_TEMPL 0x11 |
170 | #define MAX6696_REG_STATUS2 0x12 |
171 | #define MAX6659_REG_REMOTE_EMERG 0x16 |
172 | #define MAX6659_REG_LOCAL_EMERG 0x17 |
173 | |
174 | /* SA56004 registers */ |
175 | |
176 | #define SA56004_REG_LOCAL_TEMPL 0x22 |
177 | |
178 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
179 | |
180 | /* TMP451/TMP461 registers */ |
181 | #define TMP451_REG_LOCAL_TEMPL 0x15 |
182 | #define TMP451_REG_CONALERT 0x22 |
183 | |
184 | #define TMP461_REG_CHEN 0x16 |
185 | #define TMP461_REG_DFC 0x24 |
186 | |
187 | /* ADT7481 registers */ |
188 | #define ADT7481_REG_STATUS2 0x23 |
189 | #define ADT7481_REG_CONFIG2 0x24 |
190 | |
191 | #define ADT7481_REG_MAN_ID 0x3e |
192 | #define ADT7481_REG_CHIP_ID 0x3d |
193 | |
194 | /* Device features */ |
195 | #define LM90_HAVE_EXTENDED_TEMP BIT(0) /* extended temperature support */ |
196 | #define LM90_HAVE_OFFSET BIT(1) /* temperature offset register */ |
197 | #define LM90_HAVE_UNSIGNED_TEMP BIT(2) /* temperatures are unsigned */ |
198 | #define LM90_HAVE_REM_LIMIT_EXT BIT(3) /* extended remote limit */ |
199 | #define LM90_HAVE_EMERGENCY BIT(4) /* 3rd upper (emergency) limit */ |
200 | #define LM90_HAVE_EMERGENCY_ALARM BIT(5)/* emergency alarm */ |
201 | #define LM90_HAVE_TEMP3 BIT(6) /* 3rd temperature sensor */ |
202 | #define LM90_HAVE_BROKEN_ALERT BIT(7) /* Broken alert */ |
203 | #define LM90_PAUSE_FOR_CONFIG BIT(8) /* Pause conversion for config */ |
204 | #define LM90_HAVE_CRIT BIT(9) /* Chip supports CRIT/OVERT register */ |
205 | #define LM90_HAVE_CRIT_ALRM_SWP BIT(10) /* critical alarm bits swapped */ |
206 | #define LM90_HAVE_PEC BIT(11) /* Chip supports PEC */ |
207 | #define LM90_HAVE_PARTIAL_PEC BIT(12) /* Partial PEC support (adm1032)*/ |
208 | #define LM90_HAVE_ALARMS BIT(13) /* Create 'alarms' attribute */ |
209 | #define LM90_HAVE_EXT_UNSIGNED BIT(14) /* extended unsigned temperature*/ |
210 | #define LM90_HAVE_LOW BIT(15) /* low limits */ |
211 | #define LM90_HAVE_CONVRATE BIT(16) /* conversion rate */ |
212 | #define LM90_HAVE_REMOTE_EXT BIT(17) /* extended remote temperature */ |
213 | #define LM90_HAVE_FAULTQUEUE BIT(18) /* configurable samples count */ |
214 | |
215 | /* LM90 status */ |
216 | #define LM90_STATUS_LTHRM BIT(0) /* local THERM limit tripped */ |
217 | #define LM90_STATUS_RTHRM BIT(1) /* remote THERM limit tripped */ |
218 | #define LM90_STATUS_ROPEN BIT(2) /* remote is an open circuit */ |
219 | #define LM90_STATUS_RLOW BIT(3) /* remote low temp limit tripped */ |
220 | #define LM90_STATUS_RHIGH BIT(4) /* remote high temp limit tripped */ |
221 | #define LM90_STATUS_LLOW BIT(5) /* local low temp limit tripped */ |
222 | #define LM90_STATUS_LHIGH BIT(6) /* local high temp limit tripped */ |
223 | #define LM90_STATUS_BUSY BIT(7) /* conversion is ongoing */ |
224 | |
225 | /* MAX6695/6696 and ADT7481 2nd status register */ |
226 | #define MAX6696_STATUS2_R2THRM BIT(1) /* remote2 THERM limit tripped */ |
227 | #define MAX6696_STATUS2_R2OPEN BIT(2) /* remote2 is an open circuit */ |
228 | #define MAX6696_STATUS2_R2LOW BIT(3) /* remote2 low temp limit tripped */ |
229 | #define MAX6696_STATUS2_R2HIGH BIT(4) /* remote2 high temp limit tripped */ |
230 | #define MAX6696_STATUS2_ROT2 BIT(5) /* remote emergency limit tripped */ |
231 | #define MAX6696_STATUS2_R2OT2 BIT(6) /* remote2 emergency limit tripped */ |
232 | #define MAX6696_STATUS2_LOT2 BIT(7) /* local emergency limit tripped */ |
233 | |
234 | /* |
235 | * Driver data (common to all clients) |
236 | */ |
237 | |
238 | static const struct i2c_device_id lm90_id[] = { |
239 | { "adm1020" , max1617 }, |
240 | { "adm1021" , max1617 }, |
241 | { "adm1023" , adm1023 }, |
242 | { "adm1032" , adm1032 }, |
243 | { "adt7421" , adt7461a }, |
244 | { "adt7461" , adt7461 }, |
245 | { "adt7461a" , adt7461a }, |
246 | { "adt7481" , adt7481 }, |
247 | { "adt7482" , adt7481 }, |
248 | { "adt7483a" , adt7481 }, |
249 | { "g781" , g781 }, |
250 | { "gl523sm" , max1617 }, |
251 | { "lm84" , lm84 }, |
252 | { "lm86" , lm90 }, |
253 | { "lm89" , lm90 }, |
254 | { "lm90" , lm90 }, |
255 | { "lm99" , lm99 }, |
256 | { "max1617" , max1617 }, |
257 | { "max6642" , max6642 }, |
258 | { "max6646" , max6646 }, |
259 | { "max6647" , max6646 }, |
260 | { "max6648" , max6648 }, |
261 | { "max6649" , max6646 }, |
262 | { "max6654" , max6654 }, |
263 | { "max6657" , max6657 }, |
264 | { "max6658" , max6657 }, |
265 | { "max6659" , max6659 }, |
266 | { "max6680" , max6680 }, |
267 | { "max6681" , max6680 }, |
268 | { "max6690" , max6654 }, |
269 | { "max6692" , max6648 }, |
270 | { "max6695" , max6696 }, |
271 | { "max6696" , max6696 }, |
272 | { "mc1066" , max1617 }, |
273 | { "nct1008" , adt7461a }, |
274 | { "nct210" , nct210 }, |
275 | { "nct214" , nct72 }, |
276 | { "nct218" , nct72 }, |
277 | { "nct72" , nct72 }, |
278 | { "ne1618" , ne1618 }, |
279 | { "w83l771" , w83l771 }, |
280 | { "sa56004" , sa56004 }, |
281 | { "thmc10" , max1617 }, |
282 | { "tmp451" , tmp451 }, |
283 | { "tmp461" , tmp461 }, |
284 | { } |
285 | }; |
286 | MODULE_DEVICE_TABLE(i2c, lm90_id); |
287 | |
288 | static const struct of_device_id __maybe_unused lm90_of_match[] = { |
289 | { |
290 | .compatible = "adi,adm1032" , |
291 | .data = (void *)adm1032 |
292 | }, |
293 | { |
294 | .compatible = "adi,adt7461" , |
295 | .data = (void *)adt7461 |
296 | }, |
297 | { |
298 | .compatible = "adi,adt7461a" , |
299 | .data = (void *)adt7461a |
300 | }, |
301 | { |
302 | .compatible = "adi,adt7481" , |
303 | .data = (void *)adt7481 |
304 | }, |
305 | { |
306 | .compatible = "gmt,g781" , |
307 | .data = (void *)g781 |
308 | }, |
309 | { |
310 | .compatible = "national,lm90" , |
311 | .data = (void *)lm90 |
312 | }, |
313 | { |
314 | .compatible = "national,lm86" , |
315 | .data = (void *)lm90 |
316 | }, |
317 | { |
318 | .compatible = "national,lm89" , |
319 | .data = (void *)lm90 |
320 | }, |
321 | { |
322 | .compatible = "national,lm99" , |
323 | .data = (void *)lm99 |
324 | }, |
325 | { |
326 | .compatible = "dallas,max6646" , |
327 | .data = (void *)max6646 |
328 | }, |
329 | { |
330 | .compatible = "dallas,max6647" , |
331 | .data = (void *)max6646 |
332 | }, |
333 | { |
334 | .compatible = "dallas,max6649" , |
335 | .data = (void *)max6646 |
336 | }, |
337 | { |
338 | .compatible = "dallas,max6654" , |
339 | .data = (void *)max6654 |
340 | }, |
341 | { |
342 | .compatible = "dallas,max6657" , |
343 | .data = (void *)max6657 |
344 | }, |
345 | { |
346 | .compatible = "dallas,max6658" , |
347 | .data = (void *)max6657 |
348 | }, |
349 | { |
350 | .compatible = "dallas,max6659" , |
351 | .data = (void *)max6659 |
352 | }, |
353 | { |
354 | .compatible = "dallas,max6680" , |
355 | .data = (void *)max6680 |
356 | }, |
357 | { |
358 | .compatible = "dallas,max6681" , |
359 | .data = (void *)max6680 |
360 | }, |
361 | { |
362 | .compatible = "dallas,max6695" , |
363 | .data = (void *)max6696 |
364 | }, |
365 | { |
366 | .compatible = "dallas,max6696" , |
367 | .data = (void *)max6696 |
368 | }, |
369 | { |
370 | .compatible = "onnn,nct1008" , |
371 | .data = (void *)adt7461a |
372 | }, |
373 | { |
374 | .compatible = "onnn,nct214" , |
375 | .data = (void *)nct72 |
376 | }, |
377 | { |
378 | .compatible = "onnn,nct218" , |
379 | .data = (void *)nct72 |
380 | }, |
381 | { |
382 | .compatible = "onnn,nct72" , |
383 | .data = (void *)nct72 |
384 | }, |
385 | { |
386 | .compatible = "winbond,w83l771" , |
387 | .data = (void *)w83l771 |
388 | }, |
389 | { |
390 | .compatible = "nxp,sa56004" , |
391 | .data = (void *)sa56004 |
392 | }, |
393 | { |
394 | .compatible = "ti,tmp451" , |
395 | .data = (void *)tmp451 |
396 | }, |
397 | { |
398 | .compatible = "ti,tmp461" , |
399 | .data = (void *)tmp461 |
400 | }, |
401 | { }, |
402 | }; |
403 | MODULE_DEVICE_TABLE(of, lm90_of_match); |
404 | |
405 | /* |
406 | * chip type specific parameters |
407 | */ |
408 | struct lm90_params { |
409 | u32 flags; /* Capabilities */ |
410 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
411 | /* Upper 8 bits for max6695/96 */ |
412 | u8 max_convrate; /* Maximum conversion rate register value */ |
413 | u8 resolution; /* 16-bit resolution (default 11 bit) */ |
414 | u8 reg_status2; /* 2nd status register (optional) */ |
415 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
416 | u8 faultqueue_mask; /* fault queue bit mask */ |
417 | u8 faultqueue_depth; /* fault queue depth if mask is used */ |
418 | }; |
419 | |
420 | static const struct lm90_params lm90_params[] = { |
421 | [adm1023] = { |
422 | .flags = LM90_HAVE_ALARMS | LM90_HAVE_OFFSET | LM90_HAVE_BROKEN_ALERT |
423 | | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
424 | | LM90_HAVE_REMOTE_EXT, |
425 | .alert_alarms = 0x7c, |
426 | .resolution = 8, |
427 | .max_convrate = 7, |
428 | }, |
429 | [adm1032] = { |
430 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
431 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT |
432 | | LM90_HAVE_PARTIAL_PEC | LM90_HAVE_ALARMS |
433 | | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
434 | | LM90_HAVE_FAULTQUEUE, |
435 | .alert_alarms = 0x7c, |
436 | .max_convrate = 10, |
437 | }, |
438 | [adt7461] = { |
439 | /* |
440 | * Standard temperature range is supposed to be unsigned, |
441 | * but that does not match reality. Negative temperatures |
442 | * are always reported. |
443 | */ |
444 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
445 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP |
446 | | LM90_HAVE_CRIT | LM90_HAVE_PARTIAL_PEC |
447 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
448 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
449 | .alert_alarms = 0x7c, |
450 | .max_convrate = 10, |
451 | .resolution = 10, |
452 | }, |
453 | [adt7461a] = { |
454 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
455 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP |
456 | | LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_ALARMS |
457 | | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
458 | | LM90_HAVE_FAULTQUEUE, |
459 | .alert_alarms = 0x7c, |
460 | .max_convrate = 10, |
461 | }, |
462 | [adt7481] = { |
463 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
464 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP |
465 | | LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_PEC |
466 | | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT | LM90_HAVE_LOW |
467 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
468 | | LM90_HAVE_FAULTQUEUE, |
469 | .alert_alarms = 0x1c7c, |
470 | .max_convrate = 11, |
471 | .resolution = 10, |
472 | .reg_status2 = ADT7481_REG_STATUS2, |
473 | }, |
474 | [g781] = { |
475 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
476 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT |
477 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
478 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
479 | .alert_alarms = 0x7c, |
480 | .max_convrate = 7, |
481 | }, |
482 | [lm84] = { |
483 | .flags = LM90_HAVE_ALARMS, |
484 | .resolution = 8, |
485 | }, |
486 | [lm90] = { |
487 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
488 | | LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW |
489 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
490 | | LM90_HAVE_FAULTQUEUE, |
491 | .alert_alarms = 0x7b, |
492 | .max_convrate = 9, |
493 | .faultqueue_mask = BIT(0), |
494 | .faultqueue_depth = 3, |
495 | }, |
496 | [lm99] = { |
497 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
498 | | LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW |
499 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
500 | | LM90_HAVE_FAULTQUEUE, |
501 | .alert_alarms = 0x7b, |
502 | .max_convrate = 9, |
503 | .faultqueue_mask = BIT(0), |
504 | .faultqueue_depth = 3, |
505 | }, |
506 | [max1617] = { |
507 | .flags = LM90_HAVE_CONVRATE | LM90_HAVE_BROKEN_ALERT | |
508 | LM90_HAVE_LOW | LM90_HAVE_ALARMS, |
509 | .alert_alarms = 0x78, |
510 | .resolution = 8, |
511 | .max_convrate = 7, |
512 | }, |
513 | [max6642] = { |
514 | .flags = LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXT_UNSIGNED |
515 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
516 | .alert_alarms = 0x50, |
517 | .resolution = 10, |
518 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
519 | .faultqueue_mask = BIT(4), |
520 | .faultqueue_depth = 2, |
521 | }, |
522 | [max6646] = { |
523 | .flags = LM90_HAVE_CRIT | LM90_HAVE_BROKEN_ALERT |
524 | | LM90_HAVE_EXT_UNSIGNED | LM90_HAVE_ALARMS | LM90_HAVE_LOW |
525 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT, |
526 | .alert_alarms = 0x7c, |
527 | .max_convrate = 6, |
528 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
529 | }, |
530 | [max6648] = { |
531 | .flags = LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_CRIT |
532 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_LOW |
533 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT, |
534 | .alert_alarms = 0x7c, |
535 | .max_convrate = 6, |
536 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
537 | }, |
538 | [max6654] = { |
539 | .flags = LM90_HAVE_BROKEN_ALERT | LM90_HAVE_ALARMS | LM90_HAVE_LOW |
540 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT, |
541 | .alert_alarms = 0x7c, |
542 | .max_convrate = 7, |
543 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
544 | }, |
545 | [max6657] = { |
546 | .flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_CRIT |
547 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
548 | | LM90_HAVE_REMOTE_EXT, |
549 | .alert_alarms = 0x7c, |
550 | .max_convrate = 8, |
551 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
552 | }, |
553 | [max6659] = { |
554 | .flags = LM90_HAVE_EMERGENCY | LM90_HAVE_CRIT |
555 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
556 | | LM90_HAVE_REMOTE_EXT, |
557 | .alert_alarms = 0x7c, |
558 | .max_convrate = 8, |
559 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
560 | }, |
561 | [max6680] = { |
562 | /* |
563 | * Apparent temperatures of 128 degrees C or higher are reported |
564 | * and treated as negative temperatures (meaning min_alarm will |
565 | * be set). |
566 | */ |
567 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT |
568 | | LM90_HAVE_CRIT_ALRM_SWP | LM90_HAVE_BROKEN_ALERT |
569 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
570 | | LM90_HAVE_REMOTE_EXT, |
571 | .alert_alarms = 0x7c, |
572 | .max_convrate = 7, |
573 | }, |
574 | [max6696] = { |
575 | .flags = LM90_HAVE_EMERGENCY |
576 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT |
577 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
578 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
579 | .alert_alarms = 0x1c7c, |
580 | .max_convrate = 6, |
581 | .reg_status2 = MAX6696_REG_STATUS2, |
582 | .reg_local_ext = MAX6657_REG_LOCAL_TEMPL, |
583 | .faultqueue_mask = BIT(5), |
584 | .faultqueue_depth = 4, |
585 | }, |
586 | [nct72] = { |
587 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
588 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP |
589 | | LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_UNSIGNED_TEMP |
590 | | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT |
591 | | LM90_HAVE_FAULTQUEUE, |
592 | .alert_alarms = 0x7c, |
593 | .max_convrate = 10, |
594 | .resolution = 10, |
595 | }, |
596 | [nct210] = { |
597 | .flags = LM90_HAVE_ALARMS | LM90_HAVE_BROKEN_ALERT |
598 | | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
599 | | LM90_HAVE_REMOTE_EXT, |
600 | .alert_alarms = 0x7c, |
601 | .resolution = 11, |
602 | .max_convrate = 7, |
603 | }, |
604 | [ne1618] = { |
605 | .flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_BROKEN_ALERT |
606 | | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT, |
607 | .alert_alarms = 0x7c, |
608 | .resolution = 11, |
609 | .max_convrate = 7, |
610 | }, |
611 | [w83l771] = { |
612 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT |
613 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
614 | | LM90_HAVE_REMOTE_EXT, |
615 | .alert_alarms = 0x7c, |
616 | .max_convrate = 8, |
617 | }, |
618 | [sa56004] = { |
619 | /* |
620 | * Apparent temperatures of 128 degrees C or higher are reported |
621 | * and treated as negative temperatures (meaning min_alarm will |
622 | * be set). |
623 | */ |
624 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT |
625 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
626 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
627 | .alert_alarms = 0x7b, |
628 | .max_convrate = 9, |
629 | .reg_local_ext = SA56004_REG_LOCAL_TEMPL, |
630 | .faultqueue_mask = BIT(0), |
631 | .faultqueue_depth = 3, |
632 | }, |
633 | [tmp451] = { |
634 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
635 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT |
636 | | LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_ALARMS | LM90_HAVE_LOW |
637 | | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
638 | .alert_alarms = 0x7c, |
639 | .max_convrate = 9, |
640 | .resolution = 12, |
641 | .reg_local_ext = TMP451_REG_LOCAL_TEMPL, |
642 | }, |
643 | [tmp461] = { |
644 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
645 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT |
646 | | LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE |
647 | | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE, |
648 | .alert_alarms = 0x7c, |
649 | .max_convrate = 9, |
650 | .resolution = 12, |
651 | .reg_local_ext = TMP451_REG_LOCAL_TEMPL, |
652 | }, |
653 | }; |
654 | |
655 | /* |
656 | * temperature register index |
657 | */ |
658 | enum lm90_temp_reg_index { |
659 | LOCAL_LOW = 0, |
660 | LOCAL_HIGH, |
661 | LOCAL_CRIT, |
662 | REMOTE_CRIT, |
663 | LOCAL_EMERG, /* max6659 and max6695/96 */ |
664 | REMOTE_EMERG, /* max6659 and max6695/96 */ |
665 | REMOTE2_CRIT, /* max6695/96 only */ |
666 | REMOTE2_EMERG, /* max6695/96 only */ |
667 | |
668 | REMOTE_TEMP, |
669 | REMOTE_LOW, |
670 | REMOTE_HIGH, |
671 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ |
672 | LOCAL_TEMP, |
673 | REMOTE2_TEMP, /* max6695/96 only */ |
674 | REMOTE2_LOW, /* max6695/96 only */ |
675 | REMOTE2_HIGH, /* max6695/96 only */ |
676 | REMOTE2_OFFSET, |
677 | |
678 | TEMP_REG_NUM |
679 | }; |
680 | |
681 | /* |
682 | * Client data (each client gets its own) |
683 | */ |
684 | |
685 | struct lm90_data { |
686 | struct i2c_client *client; |
687 | struct device *hwmon_dev; |
688 | u32 chip_config[2]; |
689 | u32 channel_config[MAX_CHANNELS + 1]; |
690 | const char *channel_label[MAX_CHANNELS]; |
691 | struct hwmon_channel_info chip_info; |
692 | struct hwmon_channel_info temp_info; |
693 | const struct hwmon_channel_info *info[3]; |
694 | struct hwmon_chip_info chip; |
695 | struct mutex update_lock; |
696 | struct delayed_work alert_work; |
697 | struct work_struct report_work; |
698 | bool valid; /* true if register values are valid */ |
699 | bool alarms_valid; /* true if status register values are valid */ |
700 | unsigned long last_updated; /* in jiffies */ |
701 | unsigned long alarms_updated; /* in jiffies */ |
702 | int kind; |
703 | u32 flags; |
704 | |
705 | unsigned int update_interval; /* in milliseconds */ |
706 | |
707 | u8 config; /* Current configuration register value */ |
708 | u8 config_orig; /* Original configuration register value */ |
709 | u8 convrate_orig; /* Original conversion rate register value */ |
710 | u8 resolution; /* temperature resolution in bit */ |
711 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
712 | /* Upper 8 bits for max6695/96 */ |
713 | u8 max_convrate; /* Maximum conversion rate */ |
714 | u8 reg_status2; /* 2nd status register (optional) */ |
715 | u8 reg_local_ext; /* local extension register offset */ |
716 | u8 reg_remote_ext; /* remote temperature low byte */ |
717 | u8 faultqueue_mask; /* fault queue mask */ |
718 | u8 faultqueue_depth; /* fault queue mask */ |
719 | |
720 | /* registers values */ |
721 | u16 temp[TEMP_REG_NUM]; |
722 | u8 temp_hyst; |
723 | u8 conalert; |
724 | u16 reported_alarms; /* alarms reported as sysfs/udev events */ |
725 | u16 current_alarms; /* current alarms, reported by chip */ |
726 | u16 alarms; /* alarms not yet reported to user */ |
727 | }; |
728 | |
729 | /* |
730 | * Support functions |
731 | */ |
732 | |
733 | /* |
734 | * If the chip supports PEC but not on write byte transactions, we need |
735 | * to explicitly ask for a transaction without PEC. |
736 | */ |
737 | static inline s32 lm90_write_no_pec(struct i2c_client *client, u8 value) |
738 | { |
739 | return i2c_smbus_xfer(adapter: client->adapter, addr: client->addr, |
740 | flags: client->flags & ~I2C_CLIENT_PEC, |
741 | I2C_SMBUS_WRITE, command: value, I2C_SMBUS_BYTE, NULL); |
742 | } |
743 | |
744 | /* |
745 | * It is assumed that client->update_lock is held (unless we are in |
746 | * detection or initialization steps). This matters when PEC is enabled |
747 | * for chips with partial PEC support, because we don't want the address |
748 | * pointer to change between the write byte and the read byte transactions. |
749 | */ |
750 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
751 | { |
752 | struct lm90_data *data = i2c_get_clientdata(client); |
753 | bool partial_pec = (client->flags & I2C_CLIENT_PEC) && |
754 | (data->flags & LM90_HAVE_PARTIAL_PEC); |
755 | int err; |
756 | |
757 | if (partial_pec) { |
758 | err = lm90_write_no_pec(client, value: reg); |
759 | if (err) |
760 | return err; |
761 | return i2c_smbus_read_byte(client); |
762 | } |
763 | return i2c_smbus_read_byte_data(client, command: reg); |
764 | } |
765 | |
766 | /* |
767 | * Return register write address |
768 | * |
769 | * The write address for registers 0x03 .. 0x08 is the read address plus 6. |
770 | * For other registers the write address matches the read address. |
771 | */ |
772 | static u8 lm90_write_reg_addr(u8 reg) |
773 | { |
774 | if (reg >= LM90_REG_CONFIG1 && reg <= LM90_REG_REMOTE_LOWH) |
775 | return reg + 6; |
776 | return reg; |
777 | } |
778 | |
779 | /* |
780 | * Write into LM90 register. |
781 | * Convert register address to write address if needed, then execute the |
782 | * operation. |
783 | */ |
784 | static int lm90_write_reg(struct i2c_client *client, u8 reg, u8 val) |
785 | { |
786 | return i2c_smbus_write_byte_data(client, command: lm90_write_reg_addr(reg), value: val); |
787 | } |
788 | |
789 | /* |
790 | * Write into 16-bit LM90 register. |
791 | * Convert register addresses to write address if needed, then execute the |
792 | * operation. |
793 | */ |
794 | static int lm90_write16(struct i2c_client *client, u8 regh, u8 regl, u16 val) |
795 | { |
796 | int ret; |
797 | |
798 | ret = lm90_write_reg(client, reg: regh, val: val >> 8); |
799 | if (ret < 0 || !regl) |
800 | return ret; |
801 | return lm90_write_reg(client, reg: regl, val: val & 0xff); |
802 | } |
803 | |
804 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, |
805 | bool is_volatile) |
806 | { |
807 | int oldh, newh, l; |
808 | |
809 | oldh = lm90_read_reg(client, reg: regh); |
810 | if (oldh < 0) |
811 | return oldh; |
812 | |
813 | if (!regl) |
814 | return oldh << 8; |
815 | |
816 | l = lm90_read_reg(client, reg: regl); |
817 | if (l < 0) |
818 | return l; |
819 | |
820 | if (!is_volatile) |
821 | return (oldh << 8) | l; |
822 | |
823 | /* |
824 | * For volatile registers we have to use a trick. |
825 | * We have to read two registers to have the sensor temperature, |
826 | * but we have to beware a conversion could occur between the |
827 | * readings. The datasheet says we should either use |
828 | * the one-shot conversion register, which we don't want to do |
829 | * (disables hardware monitoring) or monitor the busy bit, which is |
830 | * impossible (we can't read the values and monitor that bit at the |
831 | * exact same time). So the solution used here is to read the high |
832 | * the high byte again. If the new high byte matches the old one, |
833 | * then we have a valid reading. Otherwise we have to read the low |
834 | * byte again, and now we believe we have a correct reading. |
835 | */ |
836 | newh = lm90_read_reg(client, reg: regh); |
837 | if (newh < 0) |
838 | return newh; |
839 | if (oldh != newh) { |
840 | l = lm90_read_reg(client, reg: regl); |
841 | if (l < 0) |
842 | return l; |
843 | } |
844 | return (newh << 8) | l; |
845 | } |
846 | |
847 | static int lm90_update_confreg(struct lm90_data *data, u8 config) |
848 | { |
849 | if (data->config != config) { |
850 | int err; |
851 | |
852 | err = lm90_write_reg(client: data->client, LM90_REG_CONFIG1, val: config); |
853 | if (err) |
854 | return err; |
855 | data->config = config; |
856 | } |
857 | return 0; |
858 | } |
859 | |
860 | /* |
861 | * client->update_lock must be held when calling this function (unless we are |
862 | * in detection or initialization steps), and while a remote channel other |
863 | * than channel 0 is selected. Also, calling code must make sure to re-select |
864 | * external channel 0 before releasing the lock. This is necessary because |
865 | * various registers have different meanings as a result of selecting a |
866 | * non-default remote channel. |
867 | */ |
868 | static int lm90_select_remote_channel(struct lm90_data *data, bool second) |
869 | { |
870 | u8 config = data->config & ~0x08; |
871 | |
872 | if (second) |
873 | config |= 0x08; |
874 | |
875 | return lm90_update_confreg(data, config); |
876 | } |
877 | |
878 | static int lm90_write_convrate(struct lm90_data *data, int val) |
879 | { |
880 | u8 config = data->config; |
881 | int err; |
882 | |
883 | /* Save config and pause conversion */ |
884 | if (data->flags & LM90_PAUSE_FOR_CONFIG) { |
885 | err = lm90_update_confreg(data, config: config | 0x40); |
886 | if (err < 0) |
887 | return err; |
888 | } |
889 | |
890 | /* Set conv rate */ |
891 | err = lm90_write_reg(client: data->client, LM90_REG_CONVRATE, val); |
892 | |
893 | /* Revert change to config */ |
894 | lm90_update_confreg(data, config); |
895 | |
896 | return err; |
897 | } |
898 | |
899 | /* |
900 | * Set conversion rate. |
901 | * client->update_lock must be held when calling this function (unless we are |
902 | * in detection or initialization steps). |
903 | */ |
904 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
905 | unsigned int interval) |
906 | { |
907 | unsigned int update_interval; |
908 | int i, err; |
909 | |
910 | /* Shift calculations to avoid rounding errors */ |
911 | interval <<= 6; |
912 | |
913 | /* find the nearest update rate */ |
914 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; |
915 | i < data->max_convrate; i++, update_interval >>= 1) |
916 | if (interval >= update_interval * 3 / 4) |
917 | break; |
918 | |
919 | err = lm90_write_convrate(data, val: i); |
920 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
921 | return err; |
922 | } |
923 | |
924 | static int lm90_set_faultqueue(struct i2c_client *client, |
925 | struct lm90_data *data, int val) |
926 | { |
927 | int err; |
928 | |
929 | if (data->faultqueue_mask) { |
930 | err = lm90_update_confreg(data, config: val <= data->faultqueue_depth / 2 ? |
931 | data->config & ~data->faultqueue_mask : |
932 | data->config | data->faultqueue_mask); |
933 | } else { |
934 | static const u8 values[4] = {0, 2, 6, 0x0e}; |
935 | |
936 | data->conalert = (data->conalert & 0xf1) | values[val - 1]; |
937 | err = lm90_write_reg(client: data->client, TMP451_REG_CONALERT, |
938 | val: data->conalert); |
939 | } |
940 | |
941 | return err; |
942 | } |
943 | |
944 | static int lm90_update_limits(struct device *dev) |
945 | { |
946 | struct lm90_data *data = dev_get_drvdata(dev); |
947 | struct i2c_client *client = data->client; |
948 | int val; |
949 | |
950 | if (data->flags & LM90_HAVE_CRIT) { |
951 | val = lm90_read_reg(client, LM90_REG_LOCAL_CRIT); |
952 | if (val < 0) |
953 | return val; |
954 | data->temp[LOCAL_CRIT] = val << 8; |
955 | |
956 | val = lm90_read_reg(client, LM90_REG_REMOTE_CRIT); |
957 | if (val < 0) |
958 | return val; |
959 | data->temp[REMOTE_CRIT] = val << 8; |
960 | |
961 | val = lm90_read_reg(client, LM90_REG_TCRIT_HYST); |
962 | if (val < 0) |
963 | return val; |
964 | data->temp_hyst = val; |
965 | } |
966 | if ((data->flags & LM90_HAVE_FAULTQUEUE) && !data->faultqueue_mask) { |
967 | val = lm90_read_reg(client, TMP451_REG_CONALERT); |
968 | if (val < 0) |
969 | return val; |
970 | data->conalert = val; |
971 | } |
972 | |
973 | val = lm90_read16(client, LM90_REG_REMOTE_LOWH, |
974 | regl: (data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_LOWL : 0, |
975 | is_volatile: false); |
976 | if (val < 0) |
977 | return val; |
978 | data->temp[REMOTE_LOW] = val; |
979 | |
980 | val = lm90_read16(client, LM90_REG_REMOTE_HIGHH, |
981 | regl: (data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_HIGHL : 0, |
982 | is_volatile: false); |
983 | if (val < 0) |
984 | return val; |
985 | data->temp[REMOTE_HIGH] = val; |
986 | |
987 | if (data->flags & LM90_HAVE_OFFSET) { |
988 | val = lm90_read16(client, LM90_REG_REMOTE_OFFSH, |
989 | LM90_REG_REMOTE_OFFSL, is_volatile: false); |
990 | if (val < 0) |
991 | return val; |
992 | data->temp[REMOTE_OFFSET] = val; |
993 | } |
994 | |
995 | if (data->flags & LM90_HAVE_EMERGENCY) { |
996 | val = lm90_read_reg(client, MAX6659_REG_LOCAL_EMERG); |
997 | if (val < 0) |
998 | return val; |
999 | data->temp[LOCAL_EMERG] = val << 8; |
1000 | |
1001 | val = lm90_read_reg(client, MAX6659_REG_REMOTE_EMERG); |
1002 | if (val < 0) |
1003 | return val; |
1004 | data->temp[REMOTE_EMERG] = val << 8; |
1005 | } |
1006 | |
1007 | if (data->flags & LM90_HAVE_TEMP3) { |
1008 | val = lm90_select_remote_channel(data, second: true); |
1009 | if (val < 0) |
1010 | return val; |
1011 | |
1012 | val = lm90_read_reg(client, LM90_REG_REMOTE_CRIT); |
1013 | if (val < 0) |
1014 | return val; |
1015 | data->temp[REMOTE2_CRIT] = val << 8; |
1016 | |
1017 | if (data->flags & LM90_HAVE_EMERGENCY) { |
1018 | val = lm90_read_reg(client, MAX6659_REG_REMOTE_EMERG); |
1019 | if (val < 0) |
1020 | return val; |
1021 | data->temp[REMOTE2_EMERG] = val << 8; |
1022 | } |
1023 | |
1024 | val = lm90_read_reg(client, LM90_REG_REMOTE_LOWH); |
1025 | if (val < 0) |
1026 | return val; |
1027 | data->temp[REMOTE2_LOW] = val << 8; |
1028 | |
1029 | val = lm90_read_reg(client, LM90_REG_REMOTE_HIGHH); |
1030 | if (val < 0) |
1031 | return val; |
1032 | data->temp[REMOTE2_HIGH] = val << 8; |
1033 | |
1034 | if (data->flags & LM90_HAVE_OFFSET) { |
1035 | val = lm90_read16(client, LM90_REG_REMOTE_OFFSH, |
1036 | LM90_REG_REMOTE_OFFSL, is_volatile: false); |
1037 | if (val < 0) |
1038 | return val; |
1039 | data->temp[REMOTE2_OFFSET] = val; |
1040 | } |
1041 | |
1042 | lm90_select_remote_channel(data, second: false); |
1043 | } |
1044 | |
1045 | return 0; |
1046 | } |
1047 | |
1048 | static void lm90_report_alarms(struct work_struct *work) |
1049 | { |
1050 | struct lm90_data *data = container_of(work, struct lm90_data, report_work); |
1051 | u16 cleared_alarms, new_alarms, current_alarms; |
1052 | struct device *hwmon_dev = data->hwmon_dev; |
1053 | struct device *dev = &data->client->dev; |
1054 | int st, st2; |
1055 | |
1056 | current_alarms = data->current_alarms; |
1057 | cleared_alarms = data->reported_alarms & ~current_alarms; |
1058 | new_alarms = current_alarms & ~data->reported_alarms; |
1059 | |
1060 | if (!cleared_alarms && !new_alarms) |
1061 | return; |
1062 | |
1063 | st = new_alarms & 0xff; |
1064 | st2 = new_alarms >> 8; |
1065 | |
1066 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || |
1067 | (st2 & MAX6696_STATUS2_LOT2)) |
1068 | dev_dbg(dev, "temp%d out of range, please check!\n" , 1); |
1069 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || |
1070 | (st2 & MAX6696_STATUS2_ROT2)) |
1071 | dev_dbg(dev, "temp%d out of range, please check!\n" , 2); |
1072 | if (st & LM90_STATUS_ROPEN) |
1073 | dev_dbg(dev, "temp%d diode open, please check!\n" , 2); |
1074 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | |
1075 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) |
1076 | dev_dbg(dev, "temp%d out of range, please check!\n" , 3); |
1077 | if (st2 & MAX6696_STATUS2_R2OPEN) |
1078 | dev_dbg(dev, "temp%d diode open, please check!\n" , 3); |
1079 | |
1080 | st |= cleared_alarms & 0xff; |
1081 | st2 |= cleared_alarms >> 8; |
1082 | |
1083 | if (st & LM90_STATUS_LLOW) |
1084 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_min_alarm, channel: 0); |
1085 | if (st & LM90_STATUS_RLOW) |
1086 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_min_alarm, channel: 1); |
1087 | if (st2 & MAX6696_STATUS2_R2LOW) |
1088 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_min_alarm, channel: 2); |
1089 | |
1090 | if (st & LM90_STATUS_LHIGH) |
1091 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_max_alarm, channel: 0); |
1092 | if (st & LM90_STATUS_RHIGH) |
1093 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_max_alarm, channel: 1); |
1094 | if (st2 & MAX6696_STATUS2_R2HIGH) |
1095 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_max_alarm, channel: 2); |
1096 | |
1097 | if (st & LM90_STATUS_LTHRM) |
1098 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_crit_alarm, channel: 0); |
1099 | if (st & LM90_STATUS_RTHRM) |
1100 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_crit_alarm, channel: 1); |
1101 | if (st2 & MAX6696_STATUS2_R2THRM) |
1102 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_crit_alarm, channel: 2); |
1103 | |
1104 | if (st2 & MAX6696_STATUS2_LOT2) |
1105 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_emergency_alarm, channel: 0); |
1106 | if (st2 & MAX6696_STATUS2_ROT2) |
1107 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_emergency_alarm, channel: 1); |
1108 | if (st2 & MAX6696_STATUS2_R2OT2) |
1109 | hwmon_notify_event(dev: hwmon_dev, type: hwmon_temp, attr: hwmon_temp_emergency_alarm, channel: 2); |
1110 | |
1111 | data->reported_alarms = current_alarms; |
1112 | } |
1113 | |
1114 | static int lm90_update_alarms_locked(struct lm90_data *data, bool force) |
1115 | { |
1116 | if (force || !data->alarms_valid || |
1117 | time_after(jiffies, data->alarms_updated + msecs_to_jiffies(data->update_interval))) { |
1118 | struct i2c_client *client = data->client; |
1119 | bool check_enable; |
1120 | u16 alarms; |
1121 | int val; |
1122 | |
1123 | data->alarms_valid = false; |
1124 | |
1125 | val = lm90_read_reg(client, LM90_REG_STATUS); |
1126 | if (val < 0) |
1127 | return val; |
1128 | alarms = val & ~LM90_STATUS_BUSY; |
1129 | |
1130 | if (data->reg_status2) { |
1131 | val = lm90_read_reg(client, reg: data->reg_status2); |
1132 | if (val < 0) |
1133 | return val; |
1134 | alarms |= val << 8; |
1135 | } |
1136 | /* |
1137 | * If the update is forced (called from interrupt or alert |
1138 | * handler) and alarm data is valid, the alarms may have been |
1139 | * updated after the last update interval, and the status |
1140 | * register may still be cleared. Only add additional alarms |
1141 | * in this case. Alarms will be cleared later if appropriate. |
1142 | */ |
1143 | if (force && data->alarms_valid) |
1144 | data->current_alarms |= alarms; |
1145 | else |
1146 | data->current_alarms = alarms; |
1147 | data->alarms |= alarms; |
1148 | |
1149 | check_enable = (client->irq || !(data->config_orig & 0x80)) && |
1150 | (data->config & 0x80); |
1151 | |
1152 | if (force || check_enable) |
1153 | schedule_work(work: &data->report_work); |
1154 | |
1155 | /* |
1156 | * Re-enable ALERT# output if it was originally enabled, relevant |
1157 | * alarms are all clear, and alerts are currently disabled. |
1158 | * Otherwise (re)schedule worker if needed. |
1159 | */ |
1160 | if (check_enable) { |
1161 | if (!(data->current_alarms & data->alert_alarms)) { |
1162 | dev_dbg(&client->dev, "Re-enabling ALERT#\n" ); |
1163 | lm90_update_confreg(data, config: data->config & ~0x80); |
1164 | /* |
1165 | * We may have been called from the update handler. |
1166 | * If so, the worker, if scheduled, is no longer |
1167 | * needed. Cancel it. Don't synchronize because |
1168 | * it may already be running. |
1169 | */ |
1170 | cancel_delayed_work(dwork: &data->alert_work); |
1171 | } else { |
1172 | schedule_delayed_work(dwork: &data->alert_work, |
1173 | max_t(int, HZ, msecs_to_jiffies(data->update_interval))); |
1174 | } |
1175 | } |
1176 | data->alarms_updated = jiffies; |
1177 | data->alarms_valid = true; |
1178 | } |
1179 | return 0; |
1180 | } |
1181 | |
1182 | static int lm90_update_alarms(struct lm90_data *data, bool force) |
1183 | { |
1184 | int err; |
1185 | |
1186 | mutex_lock(&data->update_lock); |
1187 | err = lm90_update_alarms_locked(data, force); |
1188 | mutex_unlock(lock: &data->update_lock); |
1189 | |
1190 | return err; |
1191 | } |
1192 | |
1193 | static void lm90_alert_work(struct work_struct *__work) |
1194 | { |
1195 | struct delayed_work *delayed_work = container_of(__work, struct delayed_work, work); |
1196 | struct lm90_data *data = container_of(delayed_work, struct lm90_data, alert_work); |
1197 | |
1198 | /* Nothing to do if alerts are enabled */ |
1199 | if (!(data->config & 0x80)) |
1200 | return; |
1201 | |
1202 | lm90_update_alarms(data, force: true); |
1203 | } |
1204 | |
1205 | static int lm90_update_device(struct device *dev) |
1206 | { |
1207 | struct lm90_data *data = dev_get_drvdata(dev); |
1208 | struct i2c_client *client = data->client; |
1209 | unsigned long next_update; |
1210 | int val; |
1211 | |
1212 | if (!data->valid) { |
1213 | val = lm90_update_limits(dev); |
1214 | if (val < 0) |
1215 | return val; |
1216 | } |
1217 | |
1218 | next_update = data->last_updated + |
1219 | msecs_to_jiffies(m: data->update_interval); |
1220 | if (time_after(jiffies, next_update) || !data->valid) { |
1221 | dev_dbg(&client->dev, "Updating lm90 data.\n" ); |
1222 | |
1223 | data->valid = false; |
1224 | |
1225 | val = lm90_read_reg(client, LM90_REG_LOCAL_LOW); |
1226 | if (val < 0) |
1227 | return val; |
1228 | data->temp[LOCAL_LOW] = val << 8; |
1229 | |
1230 | val = lm90_read_reg(client, LM90_REG_LOCAL_HIGH); |
1231 | if (val < 0) |
1232 | return val; |
1233 | data->temp[LOCAL_HIGH] = val << 8; |
1234 | |
1235 | val = lm90_read16(client, LM90_REG_LOCAL_TEMP, |
1236 | regl: data->reg_local_ext, is_volatile: true); |
1237 | if (val < 0) |
1238 | return val; |
1239 | data->temp[LOCAL_TEMP] = val; |
1240 | val = lm90_read16(client, LM90_REG_REMOTE_TEMPH, |
1241 | regl: data->reg_remote_ext, is_volatile: true); |
1242 | if (val < 0) |
1243 | return val; |
1244 | data->temp[REMOTE_TEMP] = val; |
1245 | |
1246 | if (data->flags & LM90_HAVE_TEMP3) { |
1247 | val = lm90_select_remote_channel(data, second: true); |
1248 | if (val < 0) |
1249 | return val; |
1250 | |
1251 | val = lm90_read16(client, LM90_REG_REMOTE_TEMPH, |
1252 | regl: data->reg_remote_ext, is_volatile: true); |
1253 | if (val < 0) { |
1254 | lm90_select_remote_channel(data, second: false); |
1255 | return val; |
1256 | } |
1257 | data->temp[REMOTE2_TEMP] = val; |
1258 | |
1259 | lm90_select_remote_channel(data, second: false); |
1260 | } |
1261 | |
1262 | val = lm90_update_alarms_locked(data, force: false); |
1263 | if (val < 0) |
1264 | return val; |
1265 | |
1266 | data->last_updated = jiffies; |
1267 | data->valid = true; |
1268 | } |
1269 | |
1270 | return 0; |
1271 | } |
1272 | |
1273 | /* pec used for devices with PEC support */ |
1274 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
1275 | char *buf) |
1276 | { |
1277 | struct i2c_client *client = to_i2c_client(dev); |
1278 | |
1279 | return sprintf(buf, fmt: "%d\n" , !!(client->flags & I2C_CLIENT_PEC)); |
1280 | } |
1281 | |
1282 | static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
1283 | const char *buf, size_t count) |
1284 | { |
1285 | struct i2c_client *client = to_i2c_client(dev); |
1286 | long val; |
1287 | int err; |
1288 | |
1289 | err = kstrtol(s: buf, base: 10, res: &val); |
1290 | if (err < 0) |
1291 | return err; |
1292 | |
1293 | switch (val) { |
1294 | case 0: |
1295 | client->flags &= ~I2C_CLIENT_PEC; |
1296 | break; |
1297 | case 1: |
1298 | client->flags |= I2C_CLIENT_PEC; |
1299 | break; |
1300 | default: |
1301 | return -EINVAL; |
1302 | } |
1303 | |
1304 | return count; |
1305 | } |
1306 | |
1307 | static DEVICE_ATTR_RW(pec); |
1308 | |
1309 | static int lm90_temp_get_resolution(struct lm90_data *data, int index) |
1310 | { |
1311 | switch (index) { |
1312 | case REMOTE_TEMP: |
1313 | if (data->reg_remote_ext) |
1314 | return data->resolution; |
1315 | return 8; |
1316 | case REMOTE_OFFSET: |
1317 | case REMOTE2_OFFSET: |
1318 | case REMOTE2_TEMP: |
1319 | return data->resolution; |
1320 | case LOCAL_TEMP: |
1321 | if (data->reg_local_ext) |
1322 | return data->resolution; |
1323 | return 8; |
1324 | case REMOTE_LOW: |
1325 | case REMOTE_HIGH: |
1326 | case REMOTE2_LOW: |
1327 | case REMOTE2_HIGH: |
1328 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
1329 | return data->resolution; |
1330 | return 8; |
1331 | default: |
1332 | return 8; |
1333 | } |
1334 | } |
1335 | |
1336 | static int lm90_temp_from_reg(u32 flags, u16 regval, u8 resolution) |
1337 | { |
1338 | int val; |
1339 | |
1340 | if (flags & LM90_HAVE_EXTENDED_TEMP) |
1341 | val = regval - 0x4000; |
1342 | else if (flags & (LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_EXT_UNSIGNED)) |
1343 | val = regval; |
1344 | else |
1345 | val = (s16)regval; |
1346 | |
1347 | return ((val >> (16 - resolution)) * 1000) >> (resolution - 8); |
1348 | } |
1349 | |
1350 | static int lm90_get_temp(struct lm90_data *data, int index, int channel) |
1351 | { |
1352 | int temp = lm90_temp_from_reg(flags: data->flags, regval: data->temp[index], |
1353 | resolution: lm90_temp_get_resolution(data, index)); |
1354 | |
1355 | /* +16 degrees offset for remote temperature on LM99 */ |
1356 | if (data->kind == lm99 && channel) |
1357 | temp += 16000; |
1358 | |
1359 | return temp; |
1360 | } |
1361 | |
1362 | static u16 lm90_temp_to_reg(u32 flags, long val, u8 resolution) |
1363 | { |
1364 | int fraction = resolution > 8 ? |
1365 | 1000 - DIV_ROUND_CLOSEST(1000, BIT(resolution - 8)) : 0; |
1366 | |
1367 | if (flags & LM90_HAVE_EXTENDED_TEMP) { |
1368 | val = clamp_val(val, -64000, 191000 + fraction); |
1369 | val += 64000; |
1370 | } else if (flags & LM90_HAVE_EXT_UNSIGNED) { |
1371 | val = clamp_val(val, 0, 255000 + fraction); |
1372 | } else if (flags & LM90_HAVE_UNSIGNED_TEMP) { |
1373 | val = clamp_val(val, 0, 127000 + fraction); |
1374 | } else { |
1375 | val = clamp_val(val, -128000, 127000 + fraction); |
1376 | } |
1377 | |
1378 | return DIV_ROUND_CLOSEST(val << (resolution - 8), 1000) << (16 - resolution); |
1379 | } |
1380 | |
1381 | static int lm90_set_temp(struct lm90_data *data, int index, int channel, long val) |
1382 | { |
1383 | static const u8 regs[] = { |
1384 | [LOCAL_LOW] = LM90_REG_LOCAL_LOW, |
1385 | [LOCAL_HIGH] = LM90_REG_LOCAL_HIGH, |
1386 | [LOCAL_CRIT] = LM90_REG_LOCAL_CRIT, |
1387 | [REMOTE_CRIT] = LM90_REG_REMOTE_CRIT, |
1388 | [LOCAL_EMERG] = MAX6659_REG_LOCAL_EMERG, |
1389 | [REMOTE_EMERG] = MAX6659_REG_REMOTE_EMERG, |
1390 | [REMOTE2_CRIT] = LM90_REG_REMOTE_CRIT, |
1391 | [REMOTE2_EMERG] = MAX6659_REG_REMOTE_EMERG, |
1392 | [REMOTE_LOW] = LM90_REG_REMOTE_LOWH, |
1393 | [REMOTE_HIGH] = LM90_REG_REMOTE_HIGHH, |
1394 | [REMOTE2_LOW] = LM90_REG_REMOTE_LOWH, |
1395 | [REMOTE2_HIGH] = LM90_REG_REMOTE_HIGHH, |
1396 | }; |
1397 | struct i2c_client *client = data->client; |
1398 | u8 regh = regs[index]; |
1399 | u8 regl = 0; |
1400 | int err; |
1401 | |
1402 | if (channel && (data->flags & LM90_HAVE_REM_LIMIT_EXT)) { |
1403 | if (index == REMOTE_LOW || index == REMOTE2_LOW) |
1404 | regl = LM90_REG_REMOTE_LOWL; |
1405 | else if (index == REMOTE_HIGH || index == REMOTE2_HIGH) |
1406 | regl = LM90_REG_REMOTE_HIGHL; |
1407 | } |
1408 | |
1409 | /* +16 degrees offset for remote temperature on LM99 */ |
1410 | if (data->kind == lm99 && channel) { |
1411 | /* prevent integer underflow */ |
1412 | val = max(val, -128000l); |
1413 | val -= 16000; |
1414 | } |
1415 | |
1416 | data->temp[index] = lm90_temp_to_reg(flags: data->flags, val, |
1417 | resolution: lm90_temp_get_resolution(data, index)); |
1418 | |
1419 | if (channel > 1) |
1420 | lm90_select_remote_channel(data, second: true); |
1421 | |
1422 | err = lm90_write16(client, regh, regl, val: data->temp[index]); |
1423 | |
1424 | if (channel > 1) |
1425 | lm90_select_remote_channel(data, second: false); |
1426 | |
1427 | return err; |
1428 | } |
1429 | |
1430 | static int lm90_get_temphyst(struct lm90_data *data, int index, int channel) |
1431 | { |
1432 | int temp = lm90_get_temp(data, index, channel); |
1433 | |
1434 | return temp - data->temp_hyst * 1000; |
1435 | } |
1436 | |
1437 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
1438 | { |
1439 | int temp = lm90_get_temp(data, index: LOCAL_CRIT, channel: 0); |
1440 | |
1441 | /* prevent integer overflow/underflow */ |
1442 | val = clamp_val(val, -128000l, 255000l); |
1443 | data->temp_hyst = clamp_val(DIV_ROUND_CLOSEST(temp - val, 1000), 0, 31); |
1444 | |
1445 | return lm90_write_reg(client: data->client, LM90_REG_TCRIT_HYST, val: data->temp_hyst); |
1446 | } |
1447 | |
1448 | static int lm90_get_temp_offset(struct lm90_data *data, int index) |
1449 | { |
1450 | int res = lm90_temp_get_resolution(data, index); |
1451 | |
1452 | return lm90_temp_from_reg(flags: 0, regval: data->temp[index], resolution: res); |
1453 | } |
1454 | |
1455 | static int lm90_set_temp_offset(struct lm90_data *data, int index, int channel, long val) |
1456 | { |
1457 | int err; |
1458 | |
1459 | val = lm90_temp_to_reg(flags: 0, val, resolution: lm90_temp_get_resolution(data, index)); |
1460 | |
1461 | /* For ADT7481 we can use the same registers for remote channel 1 and 2 */ |
1462 | if (channel > 1) |
1463 | lm90_select_remote_channel(data, second: true); |
1464 | |
1465 | err = lm90_write16(client: data->client, LM90_REG_REMOTE_OFFSH, LM90_REG_REMOTE_OFFSL, val); |
1466 | |
1467 | if (channel > 1) |
1468 | lm90_select_remote_channel(data, second: false); |
1469 | |
1470 | if (err) |
1471 | return err; |
1472 | |
1473 | data->temp[index] = val; |
1474 | |
1475 | return 0; |
1476 | } |
1477 | |
1478 | static const u8 lm90_temp_index[MAX_CHANNELS] = { |
1479 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP |
1480 | }; |
1481 | |
1482 | static const u8 lm90_temp_min_index[MAX_CHANNELS] = { |
1483 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW |
1484 | }; |
1485 | |
1486 | static const u8 lm90_temp_max_index[MAX_CHANNELS] = { |
1487 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH |
1488 | }; |
1489 | |
1490 | static const u8 lm90_temp_crit_index[MAX_CHANNELS] = { |
1491 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT |
1492 | }; |
1493 | |
1494 | static const u8 lm90_temp_emerg_index[MAX_CHANNELS] = { |
1495 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG |
1496 | }; |
1497 | |
1498 | static const s8 lm90_temp_offset_index[MAX_CHANNELS] = { |
1499 | -1, REMOTE_OFFSET, REMOTE2_OFFSET |
1500 | }; |
1501 | |
1502 | static const u16 lm90_min_alarm_bits[MAX_CHANNELS] = { BIT(5), BIT(3), BIT(11) }; |
1503 | static const u16 lm90_max_alarm_bits[MAX_CHANNELS] = { BIT(6), BIT(4), BIT(12) }; |
1504 | static const u16 lm90_crit_alarm_bits[MAX_CHANNELS] = { BIT(0), BIT(1), BIT(9) }; |
1505 | static const u16 lm90_crit_alarm_bits_swapped[MAX_CHANNELS] = { BIT(1), BIT(0), BIT(9) }; |
1506 | static const u16 lm90_emergency_alarm_bits[MAX_CHANNELS] = { BIT(15), BIT(13), BIT(14) }; |
1507 | static const u16 lm90_fault_bits[MAX_CHANNELS] = { BIT(0), BIT(2), BIT(10) }; |
1508 | |
1509 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1510 | { |
1511 | struct lm90_data *data = dev_get_drvdata(dev); |
1512 | int err; |
1513 | u16 bit; |
1514 | |
1515 | mutex_lock(&data->update_lock); |
1516 | err = lm90_update_device(dev); |
1517 | mutex_unlock(lock: &data->update_lock); |
1518 | if (err) |
1519 | return err; |
1520 | |
1521 | switch (attr) { |
1522 | case hwmon_temp_input: |
1523 | *val = lm90_get_temp(data, index: lm90_temp_index[channel], channel); |
1524 | break; |
1525 | case hwmon_temp_min_alarm: |
1526 | case hwmon_temp_max_alarm: |
1527 | case hwmon_temp_crit_alarm: |
1528 | case hwmon_temp_emergency_alarm: |
1529 | case hwmon_temp_fault: |
1530 | switch (attr) { |
1531 | case hwmon_temp_min_alarm: |
1532 | bit = lm90_min_alarm_bits[channel]; |
1533 | break; |
1534 | case hwmon_temp_max_alarm: |
1535 | bit = lm90_max_alarm_bits[channel]; |
1536 | break; |
1537 | case hwmon_temp_crit_alarm: |
1538 | if (data->flags & LM90_HAVE_CRIT_ALRM_SWP) |
1539 | bit = lm90_crit_alarm_bits_swapped[channel]; |
1540 | else |
1541 | bit = lm90_crit_alarm_bits[channel]; |
1542 | break; |
1543 | case hwmon_temp_emergency_alarm: |
1544 | bit = lm90_emergency_alarm_bits[channel]; |
1545 | break; |
1546 | case hwmon_temp_fault: |
1547 | bit = lm90_fault_bits[channel]; |
1548 | break; |
1549 | } |
1550 | *val = !!(data->alarms & bit); |
1551 | data->alarms &= ~bit; |
1552 | data->alarms |= data->current_alarms; |
1553 | break; |
1554 | case hwmon_temp_min: |
1555 | *val = lm90_get_temp(data, index: lm90_temp_min_index[channel], channel); |
1556 | break; |
1557 | case hwmon_temp_max: |
1558 | *val = lm90_get_temp(data, index: lm90_temp_max_index[channel], channel); |
1559 | break; |
1560 | case hwmon_temp_crit: |
1561 | *val = lm90_get_temp(data, index: lm90_temp_crit_index[channel], channel); |
1562 | break; |
1563 | case hwmon_temp_crit_hyst: |
1564 | *val = lm90_get_temphyst(data, index: lm90_temp_crit_index[channel], channel); |
1565 | break; |
1566 | case hwmon_temp_emergency: |
1567 | *val = lm90_get_temp(data, index: lm90_temp_emerg_index[channel], channel); |
1568 | break; |
1569 | case hwmon_temp_emergency_hyst: |
1570 | *val = lm90_get_temphyst(data, index: lm90_temp_emerg_index[channel], channel); |
1571 | break; |
1572 | case hwmon_temp_offset: |
1573 | *val = lm90_get_temp_offset(data, index: lm90_temp_offset_index[channel]); |
1574 | break; |
1575 | default: |
1576 | return -EOPNOTSUPP; |
1577 | } |
1578 | return 0; |
1579 | } |
1580 | |
1581 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1582 | { |
1583 | struct lm90_data *data = dev_get_drvdata(dev); |
1584 | int err; |
1585 | |
1586 | mutex_lock(&data->update_lock); |
1587 | |
1588 | err = lm90_update_device(dev); |
1589 | if (err) |
1590 | goto error; |
1591 | |
1592 | switch (attr) { |
1593 | case hwmon_temp_min: |
1594 | err = lm90_set_temp(data, index: lm90_temp_min_index[channel], |
1595 | channel, val); |
1596 | break; |
1597 | case hwmon_temp_max: |
1598 | err = lm90_set_temp(data, index: lm90_temp_max_index[channel], |
1599 | channel, val); |
1600 | break; |
1601 | case hwmon_temp_crit: |
1602 | err = lm90_set_temp(data, index: lm90_temp_crit_index[channel], |
1603 | channel, val); |
1604 | break; |
1605 | case hwmon_temp_crit_hyst: |
1606 | err = lm90_set_temphyst(data, val); |
1607 | break; |
1608 | case hwmon_temp_emergency: |
1609 | err = lm90_set_temp(data, index: lm90_temp_emerg_index[channel], |
1610 | channel, val); |
1611 | break; |
1612 | case hwmon_temp_offset: |
1613 | err = lm90_set_temp_offset(data, index: lm90_temp_offset_index[channel], |
1614 | channel, val); |
1615 | break; |
1616 | default: |
1617 | err = -EOPNOTSUPP; |
1618 | break; |
1619 | } |
1620 | error: |
1621 | mutex_unlock(lock: &data->update_lock); |
1622 | |
1623 | return err; |
1624 | } |
1625 | |
1626 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) |
1627 | { |
1628 | switch (attr) { |
1629 | case hwmon_temp_input: |
1630 | case hwmon_temp_min_alarm: |
1631 | case hwmon_temp_max_alarm: |
1632 | case hwmon_temp_crit_alarm: |
1633 | case hwmon_temp_emergency_alarm: |
1634 | case hwmon_temp_emergency_hyst: |
1635 | case hwmon_temp_fault: |
1636 | case hwmon_temp_label: |
1637 | return 0444; |
1638 | case hwmon_temp_min: |
1639 | case hwmon_temp_max: |
1640 | case hwmon_temp_crit: |
1641 | case hwmon_temp_emergency: |
1642 | case hwmon_temp_offset: |
1643 | return 0644; |
1644 | case hwmon_temp_crit_hyst: |
1645 | if (channel == 0) |
1646 | return 0644; |
1647 | return 0444; |
1648 | default: |
1649 | return 0; |
1650 | } |
1651 | } |
1652 | |
1653 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
1654 | { |
1655 | struct lm90_data *data = dev_get_drvdata(dev); |
1656 | int err; |
1657 | |
1658 | mutex_lock(&data->update_lock); |
1659 | err = lm90_update_device(dev); |
1660 | mutex_unlock(lock: &data->update_lock); |
1661 | if (err) |
1662 | return err; |
1663 | |
1664 | switch (attr) { |
1665 | case hwmon_chip_update_interval: |
1666 | *val = data->update_interval; |
1667 | break; |
1668 | case hwmon_chip_alarms: |
1669 | *val = data->alarms; |
1670 | break; |
1671 | case hwmon_chip_temp_samples: |
1672 | if (data->faultqueue_mask) { |
1673 | *val = (data->config & data->faultqueue_mask) ? |
1674 | data->faultqueue_depth : 1; |
1675 | } else { |
1676 | switch (data->conalert & 0x0e) { |
1677 | case 0x0: |
1678 | default: |
1679 | *val = 1; |
1680 | break; |
1681 | case 0x2: |
1682 | *val = 2; |
1683 | break; |
1684 | case 0x6: |
1685 | *val = 3; |
1686 | break; |
1687 | case 0xe: |
1688 | *val = 4; |
1689 | break; |
1690 | } |
1691 | } |
1692 | break; |
1693 | default: |
1694 | return -EOPNOTSUPP; |
1695 | } |
1696 | |
1697 | return 0; |
1698 | } |
1699 | |
1700 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1701 | { |
1702 | struct lm90_data *data = dev_get_drvdata(dev); |
1703 | struct i2c_client *client = data->client; |
1704 | int err; |
1705 | |
1706 | mutex_lock(&data->update_lock); |
1707 | |
1708 | err = lm90_update_device(dev); |
1709 | if (err) |
1710 | goto error; |
1711 | |
1712 | switch (attr) { |
1713 | case hwmon_chip_update_interval: |
1714 | err = lm90_set_convrate(client, data, |
1715 | clamp_val(val, 0, 100000)); |
1716 | break; |
1717 | case hwmon_chip_temp_samples: |
1718 | err = lm90_set_faultqueue(client, data, clamp_val(val, 1, 4)); |
1719 | break; |
1720 | default: |
1721 | err = -EOPNOTSUPP; |
1722 | break; |
1723 | } |
1724 | error: |
1725 | mutex_unlock(lock: &data->update_lock); |
1726 | |
1727 | return err; |
1728 | } |
1729 | |
1730 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) |
1731 | { |
1732 | switch (attr) { |
1733 | case hwmon_chip_update_interval: |
1734 | case hwmon_chip_temp_samples: |
1735 | return 0644; |
1736 | case hwmon_chip_alarms: |
1737 | return 0444; |
1738 | default: |
1739 | return 0; |
1740 | } |
1741 | } |
1742 | |
1743 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, |
1744 | u32 attr, int channel, long *val) |
1745 | { |
1746 | switch (type) { |
1747 | case hwmon_chip: |
1748 | return lm90_chip_read(dev, attr, channel, val); |
1749 | case hwmon_temp: |
1750 | return lm90_temp_read(dev, attr, channel, val); |
1751 | default: |
1752 | return -EOPNOTSUPP; |
1753 | } |
1754 | } |
1755 | |
1756 | static int lm90_read_string(struct device *dev, enum hwmon_sensor_types type, |
1757 | u32 attr, int channel, const char **str) |
1758 | { |
1759 | struct lm90_data *data = dev_get_drvdata(dev); |
1760 | |
1761 | *str = data->channel_label[channel]; |
1762 | |
1763 | return 0; |
1764 | } |
1765 | |
1766 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, |
1767 | u32 attr, int channel, long val) |
1768 | { |
1769 | switch (type) { |
1770 | case hwmon_chip: |
1771 | return lm90_chip_write(dev, attr, channel, val); |
1772 | case hwmon_temp: |
1773 | return lm90_temp_write(dev, attr, channel, val); |
1774 | default: |
1775 | return -EOPNOTSUPP; |
1776 | } |
1777 | } |
1778 | |
1779 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, |
1780 | u32 attr, int channel) |
1781 | { |
1782 | switch (type) { |
1783 | case hwmon_chip: |
1784 | return lm90_chip_is_visible(data, attr, channel); |
1785 | case hwmon_temp: |
1786 | return lm90_temp_is_visible(data, attr, channel); |
1787 | default: |
1788 | return 0; |
1789 | } |
1790 | } |
1791 | |
1792 | static const char *lm90_detect_lm84(struct i2c_client *client) |
1793 | { |
1794 | static const u8 regs[] = { |
1795 | LM90_REG_STATUS, LM90_REG_LOCAL_TEMP, LM90_REG_LOCAL_HIGH, |
1796 | LM90_REG_REMOTE_TEMPH, LM90_REG_REMOTE_HIGHH |
1797 | }; |
1798 | int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS); |
1799 | int reg1, reg2, reg3, reg4; |
1800 | bool nonzero = false; |
1801 | u8 ff = 0xff; |
1802 | int i; |
1803 | |
1804 | if (status < 0 || (status & 0xab)) |
1805 | return NULL; |
1806 | |
1807 | /* |
1808 | * For LM84, undefined registers return the most recent value. |
1809 | * Repeat several times, each time checking against a different |
1810 | * (presumably) existing register. |
1811 | */ |
1812 | for (i = 0; i < ARRAY_SIZE(regs); i++) { |
1813 | reg1 = i2c_smbus_read_byte_data(client, command: regs[i]); |
1814 | reg2 = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL); |
1815 | reg3 = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW); |
1816 | reg4 = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH); |
1817 | |
1818 | if (reg1 < 0) |
1819 | return NULL; |
1820 | |
1821 | /* If any register has a different value, this is not an LM84 */ |
1822 | if (reg2 != reg1 || reg3 != reg1 || reg4 != reg1) |
1823 | return NULL; |
1824 | |
1825 | nonzero |= reg1 || reg2 || reg3 || reg4; |
1826 | ff &= reg1; |
1827 | } |
1828 | /* |
1829 | * If all registers always returned 0 or 0xff, all bets are off, |
1830 | * and we can not make any predictions about the chip type. |
1831 | */ |
1832 | return nonzero && ff != 0xff ? "lm84" : NULL; |
1833 | } |
1834 | |
1835 | static const char *lm90_detect_max1617(struct i2c_client *client, int config1) |
1836 | { |
1837 | int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS); |
1838 | int llo, rlo, lhi, rhi; |
1839 | |
1840 | if (status < 0 || (status & 0x03)) |
1841 | return NULL; |
1842 | |
1843 | if (config1 & 0x3f) |
1844 | return NULL; |
1845 | |
1846 | /* |
1847 | * Fail if unsupported registers return anything but 0xff. |
1848 | * The calling code already checked man_id and chip_id. |
1849 | * A byte read operation repeats the most recent read operation |
1850 | * and should also return 0xff. |
1851 | */ |
1852 | if (i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL) != 0xff || |
1853 | i2c_smbus_read_byte_data(client, MAX6657_REG_LOCAL_TEMPL) != 0xff || |
1854 | i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWL) != 0xff || |
1855 | i2c_smbus_read_byte(client) != 0xff) |
1856 | return NULL; |
1857 | |
1858 | llo = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW); |
1859 | rlo = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH); |
1860 | |
1861 | lhi = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_HIGH); |
1862 | rhi = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_HIGHH); |
1863 | |
1864 | if (llo < 0 || rlo < 0) |
1865 | return NULL; |
1866 | |
1867 | /* |
1868 | * A byte read operation repeats the most recent read and should |
1869 | * return the same value. |
1870 | */ |
1871 | if (i2c_smbus_read_byte(client) != rhi) |
1872 | return NULL; |
1873 | |
1874 | /* |
1875 | * The following two checks are marginal since the checked values |
1876 | * are strictly speaking valid. |
1877 | */ |
1878 | |
1879 | /* fail for negative high limits; this also catches read errors */ |
1880 | if ((s8)lhi < 0 || (s8)rhi < 0) |
1881 | return NULL; |
1882 | |
1883 | /* fail if low limits are larger than or equal to high limits */ |
1884 | if ((s8)llo >= lhi || (s8)rlo >= rhi) |
1885 | return NULL; |
1886 | |
1887 | if (i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { |
1888 | /* |
1889 | * Word read operations return 0xff in second byte |
1890 | */ |
1891 | if (i2c_smbus_read_word_data(client, LM90_REG_REMOTE_TEMPL) != |
1892 | 0xffff) |
1893 | return NULL; |
1894 | if (i2c_smbus_read_word_data(client, LM90_REG_CONFIG1) != |
1895 | (config1 | 0xff00)) |
1896 | return NULL; |
1897 | if (i2c_smbus_read_word_data(client, LM90_REG_LOCAL_HIGH) != |
1898 | (lhi | 0xff00)) |
1899 | return NULL; |
1900 | } |
1901 | |
1902 | return "max1617" ; |
1903 | } |
1904 | |
1905 | static const char *lm90_detect_national(struct i2c_client *client, int chip_id, |
1906 | int config1, int convrate) |
1907 | { |
1908 | int config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2); |
1909 | int address = client->addr; |
1910 | const char *name = NULL; |
1911 | |
1912 | if (config2 < 0) |
1913 | return NULL; |
1914 | |
1915 | if ((config1 & 0x2a) || (config2 & 0xf8) || convrate > 0x09) |
1916 | return NULL; |
1917 | |
1918 | if (address != 0x4c && address != 0x4d) |
1919 | return NULL; |
1920 | |
1921 | switch (chip_id & 0xf0) { |
1922 | case 0x10: /* LM86 */ |
1923 | if (address == 0x4c) |
1924 | name = "lm86" ; |
1925 | break; |
1926 | case 0x20: /* LM90 */ |
1927 | if (address == 0x4c) |
1928 | name = "lm90" ; |
1929 | break; |
1930 | case 0x30: /* LM89/LM99 */ |
1931 | name = "lm99" ; /* detect LM89 as LM99 */ |
1932 | break; |
1933 | default: |
1934 | break; |
1935 | } |
1936 | |
1937 | return name; |
1938 | } |
1939 | |
1940 | static const char *lm90_detect_on(struct i2c_client *client, int chip_id, int config1, |
1941 | int convrate) |
1942 | { |
1943 | int address = client->addr; |
1944 | const char *name = NULL; |
1945 | |
1946 | switch (chip_id) { |
1947 | case 0xca: /* NCT218 */ |
1948 | if ((address == 0x4c || address == 0x4d) && !(config1 & 0x1b) && |
1949 | convrate <= 0x0a) |
1950 | name = "nct218" ; |
1951 | break; |
1952 | default: |
1953 | break; |
1954 | } |
1955 | return name; |
1956 | } |
1957 | |
1958 | static const char *lm90_detect_analog(struct i2c_client *client, bool common_address, |
1959 | int chip_id, int config1, int convrate) |
1960 | { |
1961 | int status = i2c_smbus_read_byte_data(client, LM90_REG_STATUS); |
1962 | int config2 = i2c_smbus_read_byte_data(client, ADT7481_REG_CONFIG2); |
1963 | int man_id2 = i2c_smbus_read_byte_data(client, ADT7481_REG_MAN_ID); |
1964 | int chip_id2 = i2c_smbus_read_byte_data(client, ADT7481_REG_CHIP_ID); |
1965 | int address = client->addr; |
1966 | const char *name = NULL; |
1967 | |
1968 | if (status < 0 || config2 < 0 || man_id2 < 0 || chip_id2 < 0) |
1969 | return NULL; |
1970 | |
1971 | /* |
1972 | * The following chips should be detected by this function. Known |
1973 | * register values are listed. Registers 0x3d .. 0x3e are undocumented |
1974 | * for most of the chips, yet appear to return a well defined value. |
1975 | * Register 0xff is undocumented for some of the chips. Register 0x3f |
1976 | * is undocumented for all chips, but also returns a well defined value. |
1977 | * Values are as reported from real chips unless mentioned otherwise. |
1978 | * The code below checks values for registers 0x3d, 0x3e, and 0xff, |
1979 | * but not for register 0x3f. |
1980 | * |
1981 | * Chip Register |
1982 | * 3d 3e 3f fe ff Notes |
1983 | * ---------------------------------------------------------- |
1984 | * adm1020 00 00 00 41 39 |
1985 | * adm1021 00 00 00 41 03 |
1986 | * adm1021a 00 00 00 41 3c |
1987 | * adm1023 00 00 00 41 3c same as adm1021a |
1988 | * adm1032 00 00 00 41 42 |
1989 | * |
1990 | * adt7421 21 41 04 41 04 |
1991 | * adt7461 00 00 00 41 51 |
1992 | * adt7461a 61 41 05 41 57 |
1993 | * adt7481 81 41 02 41 62 |
1994 | * adt7482 - - - 41 65 datasheet |
1995 | * 82 41 05 41 75 real chip |
1996 | * adt7483 83 41 04 41 94 |
1997 | * |
1998 | * nct72 61 41 07 41 55 |
1999 | * nct210 00 00 00 41 3f |
2000 | * nct214 61 41 08 41 5a |
2001 | * nct1008 - - - 41 57 datasheet rev. 3 |
2002 | * 61 41 06 41 54 real chip |
2003 | * |
2004 | * nvt210 - - - 41 - datasheet |
2005 | * nvt211 - - - 41 - datasheet |
2006 | */ |
2007 | switch (chip_id) { |
2008 | case 0x00 ... 0x03: /* ADM1021 */ |
2009 | case 0x05 ... 0x0f: |
2010 | if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address && |
2011 | !(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2012 | name = "adm1021" ; |
2013 | break; |
2014 | case 0x04: /* ADT7421 (undocumented) */ |
2015 | if (man_id2 == 0x41 && chip_id2 == 0x21 && |
2016 | (address == 0x4c || address == 0x4d) && |
2017 | (config1 & 0x0b) == 0x08 && convrate <= 0x0a) |
2018 | name = "adt7421" ; |
2019 | break; |
2020 | case 0x30 ... 0x38: /* ADM1021A, ADM1023 */ |
2021 | case 0x3a ... 0x3e: |
2022 | /* |
2023 | * ADM1021A and compatible chips will be mis-detected as |
2024 | * ADM1023. Chips labeled 'ADM1021A' and 'ADM1023' were both |
2025 | * found to have a Chip ID of 0x3c. |
2026 | * ADM1021A does not officially support low byte registers |
2027 | * (0x12 .. 0x14), but a chip labeled ADM1021A does support it. |
2028 | * Official support for the temperature offset high byte |
2029 | * register (0x11) was added to revision F of the ADM1021A |
2030 | * datasheet. |
2031 | * It is currently unknown if there is a means to distinguish |
2032 | * ADM1021A from ADM1023, and/or if revisions of ADM1021A exist |
2033 | * which differ in functionality from ADM1023. |
2034 | */ |
2035 | if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address && |
2036 | !(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2037 | name = "adm1023" ; |
2038 | break; |
2039 | case 0x39: /* ADM1020 (undocumented) */ |
2040 | if (man_id2 == 0x00 && chip_id2 == 0x00 && |
2041 | (address == 0x4c || address == 0x4d || address == 0x4e) && |
2042 | !(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2043 | name = "adm1020" ; |
2044 | break; |
2045 | case 0x3f: /* NCT210 */ |
2046 | if (man_id2 == 0x00 && chip_id2 == 0x00 && common_address && |
2047 | !(status & 0x03) && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2048 | name = "nct210" ; |
2049 | break; |
2050 | case 0x40 ... 0x4f: /* ADM1032 */ |
2051 | if (man_id2 == 0x00 && chip_id2 == 0x00 && |
2052 | (address == 0x4c || address == 0x4d) && !(config1 & 0x3f) && |
2053 | convrate <= 0x0a) |
2054 | name = "adm1032" ; |
2055 | break; |
2056 | case 0x51: /* ADT7461 */ |
2057 | if (man_id2 == 0x00 && chip_id2 == 0x00 && |
2058 | (address == 0x4c || address == 0x4d) && !(config1 & 0x1b) && |
2059 | convrate <= 0x0a) |
2060 | name = "adt7461" ; |
2061 | break; |
2062 | case 0x54: /* NCT1008 */ |
2063 | if (man_id2 == 0x41 && chip_id2 == 0x61 && |
2064 | (address == 0x4c || address == 0x4d) && !(config1 & 0x1b) && |
2065 | convrate <= 0x0a) |
2066 | name = "nct1008" ; |
2067 | break; |
2068 | case 0x55: /* NCT72 */ |
2069 | if (man_id2 == 0x41 && chip_id2 == 0x61 && |
2070 | (address == 0x4c || address == 0x4d) && !(config1 & 0x1b) && |
2071 | convrate <= 0x0a) |
2072 | name = "nct72" ; |
2073 | break; |
2074 | case 0x57: /* ADT7461A, NCT1008 (datasheet rev. 3) */ |
2075 | if (man_id2 == 0x41 && chip_id2 == 0x61 && |
2076 | (address == 0x4c || address == 0x4d) && !(config1 & 0x1b) && |
2077 | convrate <= 0x0a) |
2078 | name = "adt7461a" ; |
2079 | break; |
2080 | case 0x5a: /* NCT214 */ |
2081 | if (man_id2 == 0x41 && chip_id2 == 0x61 && |
2082 | common_address && !(config1 & 0x1b) && convrate <= 0x0a) |
2083 | name = "nct214" ; |
2084 | break; |
2085 | case 0x62: /* ADT7481, undocumented */ |
2086 | if (man_id2 == 0x41 && chip_id2 == 0x81 && |
2087 | (address == 0x4b || address == 0x4c) && !(config1 & 0x10) && |
2088 | !(config2 & 0x7f) && (convrate & 0x0f) <= 0x0b) { |
2089 | name = "adt7481" ; |
2090 | } |
2091 | break; |
2092 | case 0x65: /* ADT7482, datasheet */ |
2093 | case 0x75: /* ADT7482, real chip */ |
2094 | if (man_id2 == 0x41 && chip_id2 == 0x82 && |
2095 | address == 0x4c && !(config1 & 0x10) && !(config2 & 0x7f) && |
2096 | convrate <= 0x0a) |
2097 | name = "adt7482" ; |
2098 | break; |
2099 | case 0x94: /* ADT7483 */ |
2100 | if (man_id2 == 0x41 && chip_id2 == 0x83 && |
2101 | common_address && |
2102 | ((address >= 0x18 && address <= 0x1a) || |
2103 | (address >= 0x29 && address <= 0x2b) || |
2104 | (address >= 0x4c && address <= 0x4e)) && |
2105 | !(config1 & 0x10) && !(config2 & 0x7f) && convrate <= 0x0a) |
2106 | name = "adt7483a" ; |
2107 | break; |
2108 | default: |
2109 | break; |
2110 | } |
2111 | |
2112 | return name; |
2113 | } |
2114 | |
2115 | static const char *lm90_detect_maxim(struct i2c_client *client, bool common_address, |
2116 | int chip_id, int config1, int convrate) |
2117 | { |
2118 | int man_id, emerg, emerg2, status2; |
2119 | int address = client->addr; |
2120 | const char *name = NULL; |
2121 | |
2122 | switch (chip_id) { |
2123 | case 0x01: |
2124 | if (!common_address) |
2125 | break; |
2126 | |
2127 | /* |
2128 | * We read MAX6659_REG_REMOTE_EMERG twice, and re-read |
2129 | * LM90_REG_MAN_ID in between. If MAX6659_REG_REMOTE_EMERG |
2130 | * exists, both readings will reflect the same value. Otherwise, |
2131 | * the readings will be different. |
2132 | */ |
2133 | emerg = i2c_smbus_read_byte_data(client, |
2134 | MAX6659_REG_REMOTE_EMERG); |
2135 | man_id = i2c_smbus_read_byte_data(client, |
2136 | LM90_REG_MAN_ID); |
2137 | emerg2 = i2c_smbus_read_byte_data(client, |
2138 | MAX6659_REG_REMOTE_EMERG); |
2139 | status2 = i2c_smbus_read_byte_data(client, |
2140 | MAX6696_REG_STATUS2); |
2141 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) |
2142 | return NULL; |
2143 | |
2144 | /* |
2145 | * Even though MAX6695 and MAX6696 do not have a chip ID |
2146 | * register, reading it returns 0x01. Bit 4 of the config1 |
2147 | * register is unused and should return zero when read. Bit 0 of |
2148 | * the status2 register is unused and should return zero when |
2149 | * read. |
2150 | * |
2151 | * MAX6695 and MAX6696 have an additional set of temperature |
2152 | * limit registers. We can detect those chips by checking if |
2153 | * one of those registers exists. |
2154 | */ |
2155 | if (!(config1 & 0x10) && !(status2 & 0x01) && emerg == emerg2 && |
2156 | convrate <= 0x07) |
2157 | name = "max6696" ; |
2158 | /* |
2159 | * The chip_id register of the MAX6680 and MAX6681 holds the |
2160 | * revision of the chip. The lowest bit of the config1 register |
2161 | * is unused and should return zero when read, so should the |
2162 | * second to last bit of config1 (software reset). Register |
2163 | * address 0x12 (LM90_REG_REMOTE_OFFSL) exists for this chip and |
2164 | * should differ from emerg2, and emerg2 should match man_id |
2165 | * since it does not exist. |
2166 | */ |
2167 | else if (!(config1 & 0x03) && convrate <= 0x07 && |
2168 | emerg2 == man_id && emerg2 != status2) |
2169 | name = "max6680" ; |
2170 | /* |
2171 | * MAX1617A does not have any extended registers (register |
2172 | * address 0x10 or higher) except for manufacturer and |
2173 | * device ID registers. Unlike other chips of this series, |
2174 | * unsupported registers were observed to return a fixed value |
2175 | * of 0x01. |
2176 | * Note: Multiple chips with different markings labeled as |
2177 | * "MAX1617" (no "A") were observed to report manufacturer ID |
2178 | * 0x4d and device ID 0x01. It is unknown if other variants of |
2179 | * MAX1617/MAX617A with different behavior exist. The detection |
2180 | * code below works for those chips. |
2181 | */ |
2182 | else if (!(config1 & 0x03f) && convrate <= 0x07 && |
2183 | emerg == 0x01 && emerg2 == 0x01 && status2 == 0x01) |
2184 | name = "max1617" ; |
2185 | break; |
2186 | case 0x08: |
2187 | /* |
2188 | * The chip_id of the MAX6654 holds the revision of the chip. |
2189 | * The lowest 3 bits of the config1 register are unused and |
2190 | * should return zero when read. |
2191 | */ |
2192 | if (common_address && !(config1 & 0x07) && convrate <= 0x07) |
2193 | name = "max6654" ; |
2194 | break; |
2195 | case 0x09: |
2196 | /* |
2197 | * The chip_id of the MAX6690 holds the revision of the chip. |
2198 | * The lowest 3 bits of the config1 register are unused and |
2199 | * should return zero when read. |
2200 | * Note that MAX6654 and MAX6690 are practically the same chips. |
2201 | * The only diference is the rated accuracy. Rev. 1 of the |
2202 | * MAX6690 datasheet lists a chip ID of 0x08, and a chip labeled |
2203 | * MAX6654 was observed to have a chip ID of 0x09. |
2204 | */ |
2205 | if (common_address && !(config1 & 0x07) && convrate <= 0x07) |
2206 | name = "max6690" ; |
2207 | break; |
2208 | case 0x4d: |
2209 | /* |
2210 | * MAX6642, MAX6657, MAX6658 and MAX6659 do NOT have a chip_id |
2211 | * register. Reading from that address will return the last |
2212 | * read value, which in our case is those of the man_id |
2213 | * register, or 0x4d. |
2214 | * MAX6642 does not have a conversion rate register, nor low |
2215 | * limit registers. Reading from those registers returns the |
2216 | * last read value. |
2217 | * |
2218 | * For MAX6657, MAX6658 and MAX6659, the config1 register lacks |
2219 | * a low nibble, so the value will be those of the previous |
2220 | * read, so in our case again those of the man_id register. |
2221 | * MAX6659 has a third set of upper temperature limit registers. |
2222 | * Those registers also return values on MAX6657 and MAX6658, |
2223 | * thus the only way to detect MAX6659 is by its address. |
2224 | * For this reason it will be mis-detected as MAX6657 if its |
2225 | * address is 0x4c. |
2226 | */ |
2227 | if (address >= 0x48 && address <= 0x4f && config1 == convrate && |
2228 | !(config1 & 0x0f)) { |
2229 | int regval; |
2230 | |
2231 | /* |
2232 | * We know that this is not a MAX6657/58/59 because its |
2233 | * configuration register has the wrong value and it does |
2234 | * not appear to have a conversion rate register. |
2235 | */ |
2236 | |
2237 | /* re-read manufacturer ID to have a good baseline */ |
2238 | if (i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID) != 0x4d) |
2239 | break; |
2240 | |
2241 | /* check various non-existing registers */ |
2242 | if (i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE) != 0x4d || |
2243 | i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW) != 0x4d || |
2244 | i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH) != 0x4d) |
2245 | break; |
2246 | |
2247 | /* check for unused status register bits */ |
2248 | regval = i2c_smbus_read_byte_data(client, LM90_REG_STATUS); |
2249 | if (regval < 0 || (regval & 0x2b)) |
2250 | break; |
2251 | |
2252 | /* re-check unsupported registers */ |
2253 | if (i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE) != regval || |
2254 | i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_LOW) != regval || |
2255 | i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_LOWH) != regval) |
2256 | break; |
2257 | |
2258 | name = "max6642" ; |
2259 | } else if ((address == 0x4c || address == 0x4d || address == 0x4e) && |
2260 | (config1 & 0x1f) == 0x0d && convrate <= 0x09) { |
2261 | if (address == 0x4c) |
2262 | name = "max6657" ; |
2263 | else |
2264 | name = "max6659" ; |
2265 | } |
2266 | break; |
2267 | case 0x59: |
2268 | /* |
2269 | * The chip_id register of the MAX6646/6647/6649 holds the |
2270 | * revision of the chip. The lowest 6 bits of the config1 |
2271 | * register are unused and should return zero when read. |
2272 | * The I2C address of MAX6648/6692 is fixed at 0x4c. |
2273 | * MAX6646 is at address 0x4d, MAX6647 is at address 0x4e, |
2274 | * and MAX6649 is at address 0x4c. A slight difference between |
2275 | * the two sets of chips is that the remote temperature register |
2276 | * reports different values if the DXP pin is open or shorted. |
2277 | * We can use that information to help distinguish between the |
2278 | * chips. MAX6648 will be mis-detected as MAX6649 if the remote |
2279 | * diode is connected, but there isn't really anything we can |
2280 | * do about that. |
2281 | */ |
2282 | if (!(config1 & 0x3f) && convrate <= 0x07) { |
2283 | int temp; |
2284 | |
2285 | switch (address) { |
2286 | case 0x4c: |
2287 | /* |
2288 | * MAX6649 reports an external temperature |
2289 | * value of 0xff if DXP is open or shorted. |
2290 | * MAX6648 reports 0x80 in that case. |
2291 | */ |
2292 | temp = i2c_smbus_read_byte_data(client, |
2293 | LM90_REG_REMOTE_TEMPH); |
2294 | if (temp == 0x80) |
2295 | name = "max6648" ; |
2296 | else |
2297 | name = "max6649" ; |
2298 | break; |
2299 | case 0x4d: |
2300 | name = "max6646" ; |
2301 | break; |
2302 | case 0x4e: |
2303 | name = "max6647" ; |
2304 | break; |
2305 | default: |
2306 | break; |
2307 | } |
2308 | } |
2309 | break; |
2310 | default: |
2311 | break; |
2312 | } |
2313 | |
2314 | return name; |
2315 | } |
2316 | |
2317 | static const char *lm90_detect_nuvoton(struct i2c_client *client, int chip_id, |
2318 | int config1, int convrate) |
2319 | { |
2320 | int config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2); |
2321 | int address = client->addr; |
2322 | const char *name = NULL; |
2323 | |
2324 | if (config2 < 0) |
2325 | return NULL; |
2326 | |
2327 | if (address == 0x4c && !(config1 & 0x2a) && !(config2 & 0xf8)) { |
2328 | if (chip_id == 0x01 && convrate <= 0x09) { |
2329 | /* W83L771W/G */ |
2330 | name = "w83l771" ; |
2331 | } else if ((chip_id & 0xfe) == 0x10 && convrate <= 0x08) { |
2332 | /* W83L771AWG/ASG */ |
2333 | name = "w83l771" ; |
2334 | } |
2335 | } |
2336 | return name; |
2337 | } |
2338 | |
2339 | static const char *lm90_detect_nxp(struct i2c_client *client, bool common_address, |
2340 | int chip_id, int config1, int convrate) |
2341 | { |
2342 | int address = client->addr; |
2343 | const char *name = NULL; |
2344 | int config2; |
2345 | |
2346 | switch (chip_id) { |
2347 | case 0x00: |
2348 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG2); |
2349 | if (config2 < 0) |
2350 | return NULL; |
2351 | if (address >= 0x48 && address <= 0x4f && |
2352 | !(config1 & 0x2a) && !(config2 & 0xfe) && convrate <= 0x09) |
2353 | name = "sa56004" ; |
2354 | break; |
2355 | case 0x80: |
2356 | if (common_address && !(config1 & 0x3f) && convrate <= 0x07) |
2357 | name = "ne1618" ; |
2358 | break; |
2359 | default: |
2360 | break; |
2361 | } |
2362 | return name; |
2363 | } |
2364 | |
2365 | static const char *lm90_detect_gmt(struct i2c_client *client, int chip_id, |
2366 | int config1, int convrate) |
2367 | { |
2368 | int address = client->addr; |
2369 | |
2370 | /* |
2371 | * According to the datasheet, G781 is supposed to be at I2C Address |
2372 | * 0x4c and have a chip ID of 0x01. G781-1 is supposed to be at I2C |
2373 | * address 0x4d and have a chip ID of 0x03. However, when support |
2374 | * for G781 was added, chips at 0x4c and 0x4d were found to have a |
2375 | * chip ID of 0x01. A G781-1 at I2C address 0x4d was now found with |
2376 | * chip ID 0x03. |
2377 | * To avoid detection failures, accept chip ID 0x01 and 0x03 at both |
2378 | * addresses. |
2379 | * G784 reports manufacturer ID 0x47 and chip ID 0x01. A public |
2380 | * datasheet is not available. Extensive testing suggests that |
2381 | * the chip appears to be fully compatible with G781. |
2382 | * Available register dumps show that G751 also reports manufacturer |
2383 | * ID 0x47 and chip ID 0x01 even though that chip does not officially |
2384 | * support those registers. This makes chip detection somewhat |
2385 | * vulnerable. To improve detection quality, read the offset low byte |
2386 | * and alert fault queue registers and verify that only expected bits |
2387 | * are set. |
2388 | */ |
2389 | if ((chip_id == 0x01 || chip_id == 0x03) && |
2390 | (address == 0x4c || address == 0x4d) && |
2391 | !(config1 & 0x3f) && convrate <= 0x08) { |
2392 | int reg; |
2393 | |
2394 | reg = i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_OFFSL); |
2395 | if (reg < 0 || reg & 0x1f) |
2396 | return NULL; |
2397 | reg = i2c_smbus_read_byte_data(client, TMP451_REG_CONALERT); |
2398 | if (reg < 0 || reg & 0xf1) |
2399 | return NULL; |
2400 | |
2401 | return "g781" ; |
2402 | } |
2403 | |
2404 | return NULL; |
2405 | } |
2406 | |
2407 | static const char *lm90_detect_ti49(struct i2c_client *client, bool common_address, |
2408 | int chip_id, int config1, int convrate) |
2409 | { |
2410 | if (common_address && chip_id == 0x00 && !(config1 & 0x3f) && !(convrate & 0xf8)) { |
2411 | /* THMC10: Unsupported registers return 0xff */ |
2412 | if (i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_TEMPL) == 0xff && |
2413 | i2c_smbus_read_byte_data(client, LM90_REG_REMOTE_CRIT) == 0xff) |
2414 | return "thmc10" ; |
2415 | } |
2416 | return NULL; |
2417 | } |
2418 | |
2419 | static const char *lm90_detect_ti(struct i2c_client *client, int chip_id, |
2420 | int config1, int convrate) |
2421 | { |
2422 | int address = client->addr; |
2423 | const char *name = NULL; |
2424 | |
2425 | if (chip_id == 0x00 && !(config1 & 0x1b) && convrate <= 0x09) { |
2426 | int local_ext, conalert, chen, dfc; |
2427 | |
2428 | local_ext = i2c_smbus_read_byte_data(client, |
2429 | TMP451_REG_LOCAL_TEMPL); |
2430 | conalert = i2c_smbus_read_byte_data(client, |
2431 | TMP451_REG_CONALERT); |
2432 | chen = i2c_smbus_read_byte_data(client, TMP461_REG_CHEN); |
2433 | dfc = i2c_smbus_read_byte_data(client, TMP461_REG_DFC); |
2434 | |
2435 | if (!(local_ext & 0x0f) && (conalert & 0xf1) == 0x01 && |
2436 | (chen & 0xfc) == 0x00 && (dfc & 0xfc) == 0x00) { |
2437 | if (address == 0x4c && !(chen & 0x03)) |
2438 | name = "tmp451" ; |
2439 | else if (address >= 0x48 && address <= 0x4f) |
2440 | name = "tmp461" ; |
2441 | } |
2442 | } |
2443 | |
2444 | return name; |
2445 | } |
2446 | |
2447 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
2448 | static int lm90_detect(struct i2c_client *client, struct i2c_board_info *info) |
2449 | { |
2450 | struct i2c_adapter *adapter = client->adapter; |
2451 | int man_id, chip_id, config1, convrate, lhigh; |
2452 | const char *name = NULL; |
2453 | int address = client->addr; |
2454 | bool common_address = |
2455 | (address >= 0x18 && address <= 0x1a) || |
2456 | (address >= 0x29 && address <= 0x2b) || |
2457 | (address >= 0x4c && address <= 0x4e); |
2458 | |
2459 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
2460 | return -ENODEV; |
2461 | |
2462 | /* |
2463 | * Get well defined register value for chips with neither man_id nor |
2464 | * chip_id registers. |
2465 | */ |
2466 | lhigh = i2c_smbus_read_byte_data(client, LM90_REG_LOCAL_HIGH); |
2467 | |
2468 | /* detection and identification */ |
2469 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID); |
2470 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_CHIP_ID); |
2471 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_CONFIG1); |
2472 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE); |
2473 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0 || lhigh < 0) |
2474 | return -ENODEV; |
2475 | |
2476 | /* Bail out immediately if all register report the same value */ |
2477 | if (lhigh == man_id && lhigh == chip_id && lhigh == config1 && lhigh == convrate) |
2478 | return -ENODEV; |
2479 | |
2480 | /* |
2481 | * If reading man_id and chip_id both return the same value as lhigh, |
2482 | * the chip may not support those registers and return the most recent read |
2483 | * value. Check again with a different register and handle accordingly. |
2484 | */ |
2485 | if (man_id == lhigh && chip_id == lhigh) { |
2486 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_CONVRATE); |
2487 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_MAN_ID); |
2488 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_CHIP_ID); |
2489 | if (convrate < 0 || man_id < 0 || chip_id < 0) |
2490 | return -ENODEV; |
2491 | if (man_id == convrate && chip_id == convrate) |
2492 | man_id = -1; |
2493 | } |
2494 | switch (man_id) { |
2495 | case -1: /* Chip does not support man_id / chip_id */ |
2496 | if (common_address && !convrate && !(config1 & 0x7f)) |
2497 | name = lm90_detect_lm84(client); |
2498 | break; |
2499 | case 0x01: /* National Semiconductor */ |
2500 | name = lm90_detect_national(client, chip_id, config1, convrate); |
2501 | break; |
2502 | case 0x1a: /* ON */ |
2503 | name = lm90_detect_on(client, chip_id, config1, convrate); |
2504 | break; |
2505 | case 0x23: /* Genesys Logic */ |
2506 | if (common_address && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2507 | name = "gl523sm" ; |
2508 | break; |
2509 | case 0x41: /* Analog Devices */ |
2510 | name = lm90_detect_analog(client, common_address, chip_id, config1, |
2511 | convrate); |
2512 | break; |
2513 | case 0x47: /* GMT */ |
2514 | name = lm90_detect_gmt(client, chip_id, config1, convrate); |
2515 | break; |
2516 | case 0x49: /* TI */ |
2517 | name = lm90_detect_ti49(client, common_address, chip_id, config1, convrate); |
2518 | break; |
2519 | case 0x4d: /* Maxim Integrated */ |
2520 | name = lm90_detect_maxim(client, common_address, chip_id, |
2521 | config1, convrate); |
2522 | break; |
2523 | case 0x54: /* ON MC1066, Microchip TC1068, TCM1617 (originally TelCom) */ |
2524 | if (common_address && !(config1 & 0x3f) && !(convrate & 0xf8)) |
2525 | name = "mc1066" ; |
2526 | break; |
2527 | case 0x55: /* TI */ |
2528 | name = lm90_detect_ti(client, chip_id, config1, convrate); |
2529 | break; |
2530 | case 0x5c: /* Winbond/Nuvoton */ |
2531 | name = lm90_detect_nuvoton(client, chip_id, config1, convrate); |
2532 | break; |
2533 | case 0xa1: /* NXP Semiconductor/Philips */ |
2534 | name = lm90_detect_nxp(client, common_address, chip_id, config1, convrate); |
2535 | break; |
2536 | case 0xff: /* MAX1617, G767, NE1617 */ |
2537 | if (common_address && chip_id == 0xff && convrate < 8) |
2538 | name = lm90_detect_max1617(client, config1); |
2539 | break; |
2540 | default: |
2541 | break; |
2542 | } |
2543 | |
2544 | if (!name) { /* identification failed */ |
2545 | dev_dbg(&adapter->dev, |
2546 | "Unsupported chip at 0x%02x (man_id=0x%02X, chip_id=0x%02X)\n" , |
2547 | client->addr, man_id, chip_id); |
2548 | return -ENODEV; |
2549 | } |
2550 | |
2551 | strscpy(info->type, name, I2C_NAME_SIZE); |
2552 | |
2553 | return 0; |
2554 | } |
2555 | |
2556 | static void lm90_restore_conf(void *_data) |
2557 | { |
2558 | struct lm90_data *data = _data; |
2559 | struct i2c_client *client = data->client; |
2560 | |
2561 | cancel_delayed_work_sync(dwork: &data->alert_work); |
2562 | cancel_work_sync(work: &data->report_work); |
2563 | |
2564 | /* Restore initial configuration */ |
2565 | if (data->flags & LM90_HAVE_CONVRATE) |
2566 | lm90_write_convrate(data, val: data->convrate_orig); |
2567 | lm90_write_reg(client, LM90_REG_CONFIG1, val: data->config_orig); |
2568 | } |
2569 | |
2570 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
2571 | { |
2572 | struct device_node *np = client->dev.of_node; |
2573 | int config, convrate; |
2574 | |
2575 | if (data->flags & LM90_HAVE_CONVRATE) { |
2576 | convrate = lm90_read_reg(client, LM90_REG_CONVRATE); |
2577 | if (convrate < 0) |
2578 | return convrate; |
2579 | data->convrate_orig = convrate; |
2580 | lm90_set_convrate(client, data, interval: 500); /* 500ms; 2Hz conversion rate */ |
2581 | } else { |
2582 | data->update_interval = 500; |
2583 | } |
2584 | |
2585 | /* |
2586 | * Start the conversions. |
2587 | */ |
2588 | config = lm90_read_reg(client, LM90_REG_CONFIG1); |
2589 | if (config < 0) |
2590 | return config; |
2591 | data->config_orig = config; |
2592 | data->config = config; |
2593 | |
2594 | /* Check Temperature Range Select */ |
2595 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) { |
2596 | if (of_property_read_bool(np, propname: "ti,extended-range-enable" )) |
2597 | config |= 0x04; |
2598 | if (!(config & 0x04)) |
2599 | data->flags &= ~LM90_HAVE_EXTENDED_TEMP; |
2600 | } |
2601 | |
2602 | /* |
2603 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, |
2604 | * 0.125 degree resolution) and range (0x08, extend range |
2605 | * to -64 degree) mode for the remote temperature sensor. |
2606 | * Note that expeciments with an actual chip do not show a difference |
2607 | * if bit 3 is set or not. |
2608 | */ |
2609 | if (data->kind == max6680) |
2610 | config |= 0x18; |
2611 | |
2612 | /* |
2613 | * Put MAX6654 into extended range (0x20, extend minimum range from |
2614 | * 0 degrees to -64 degrees). Note that extended resolution is not |
2615 | * possible on the MAX6654 unless conversion rate is set to 1 Hz or |
2616 | * slower, which is intentionally not done by default. |
2617 | */ |
2618 | if (data->kind == max6654) |
2619 | config |= 0x20; |
2620 | |
2621 | /* |
2622 | * Select external channel 0 for devices with three sensors |
2623 | */ |
2624 | if (data->flags & LM90_HAVE_TEMP3) |
2625 | config &= ~0x08; |
2626 | |
2627 | /* |
2628 | * Interrupt is enabled by default on reset, but it may be disabled |
2629 | * by bootloader, unmask it. |
2630 | */ |
2631 | if (client->irq) |
2632 | config &= ~0x80; |
2633 | |
2634 | config &= 0xBF; /* run */ |
2635 | lm90_update_confreg(data, config); |
2636 | |
2637 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
2638 | } |
2639 | |
2640 | static bool lm90_is_tripped(struct i2c_client *client) |
2641 | { |
2642 | struct lm90_data *data = i2c_get_clientdata(client); |
2643 | int ret; |
2644 | |
2645 | ret = lm90_update_alarms(data, force: true); |
2646 | if (ret < 0) |
2647 | return false; |
2648 | |
2649 | return !!data->current_alarms; |
2650 | } |
2651 | |
2652 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
2653 | { |
2654 | struct i2c_client *client = dev_id; |
2655 | |
2656 | if (lm90_is_tripped(client)) |
2657 | return IRQ_HANDLED; |
2658 | else |
2659 | return IRQ_NONE; |
2660 | } |
2661 | |
2662 | static void lm90_remove_pec(void *dev) |
2663 | { |
2664 | device_remove_file(dev, attr: &dev_attr_pec); |
2665 | } |
2666 | |
2667 | static int lm90_probe_channel_from_dt(struct i2c_client *client, |
2668 | struct device_node *child, |
2669 | struct lm90_data *data) |
2670 | { |
2671 | u32 id; |
2672 | s32 val; |
2673 | int err; |
2674 | struct device *dev = &client->dev; |
2675 | |
2676 | err = of_property_read_u32(np: child, propname: "reg" , out_value: &id); |
2677 | if (err) { |
2678 | dev_err(dev, "missing reg property of %pOFn\n" , child); |
2679 | return err; |
2680 | } |
2681 | |
2682 | if (id >= MAX_CHANNELS) { |
2683 | dev_err(dev, "invalid reg property value %d in %pOFn\n" , id, child); |
2684 | return -EINVAL; |
2685 | } |
2686 | |
2687 | err = of_property_read_string(np: child, propname: "label" , out_string: &data->channel_label[id]); |
2688 | if (err == -ENODATA || err == -EILSEQ) { |
2689 | dev_err(dev, "invalid label property in %pOFn\n" , child); |
2690 | return err; |
2691 | } |
2692 | |
2693 | if (data->channel_label[id]) |
2694 | data->channel_config[id] |= HWMON_T_LABEL; |
2695 | |
2696 | err = of_property_read_s32(np: child, propname: "temperature-offset-millicelsius" , out_value: &val); |
2697 | if (!err) { |
2698 | if (id == 0) { |
2699 | dev_err(dev, "temperature-offset-millicelsius can't be set for internal channel\n" ); |
2700 | return -EINVAL; |
2701 | } |
2702 | |
2703 | err = lm90_set_temp_offset(data, index: lm90_temp_offset_index[id], channel: id, val); |
2704 | if (err) { |
2705 | dev_err(dev, "can't set temperature offset %d for channel %d (%d)\n" , |
2706 | val, id, err); |
2707 | return err; |
2708 | } |
2709 | } |
2710 | |
2711 | return 0; |
2712 | } |
2713 | |
2714 | static int lm90_parse_dt_channel_info(struct i2c_client *client, |
2715 | struct lm90_data *data) |
2716 | { |
2717 | int err; |
2718 | struct device_node *child; |
2719 | struct device *dev = &client->dev; |
2720 | const struct device_node *np = dev->of_node; |
2721 | |
2722 | for_each_child_of_node(np, child) { |
2723 | if (strcmp(child->name, "channel" )) |
2724 | continue; |
2725 | |
2726 | err = lm90_probe_channel_from_dt(client, child, data); |
2727 | if (err) { |
2728 | of_node_put(node: child); |
2729 | return err; |
2730 | } |
2731 | } |
2732 | |
2733 | return 0; |
2734 | } |
2735 | |
2736 | static const struct hwmon_ops lm90_ops = { |
2737 | .is_visible = lm90_is_visible, |
2738 | .read = lm90_read, |
2739 | .read_string = lm90_read_string, |
2740 | .write = lm90_write, |
2741 | }; |
2742 | |
2743 | static int lm90_probe(struct i2c_client *client) |
2744 | { |
2745 | struct device *dev = &client->dev; |
2746 | struct i2c_adapter *adapter = client->adapter; |
2747 | struct hwmon_channel_info *info; |
2748 | struct device *hwmon_dev; |
2749 | struct lm90_data *data; |
2750 | int err; |
2751 | |
2752 | err = devm_regulator_get_enable(dev, id: "vcc" ); |
2753 | if (err) |
2754 | return dev_err_probe(dev, err, fmt: "Failed to enable regulator\n" ); |
2755 | |
2756 | data = devm_kzalloc(dev, size: sizeof(struct lm90_data), GFP_KERNEL); |
2757 | if (!data) |
2758 | return -ENOMEM; |
2759 | |
2760 | data->client = client; |
2761 | i2c_set_clientdata(client, data); |
2762 | mutex_init(&data->update_lock); |
2763 | INIT_DELAYED_WORK(&data->alert_work, lm90_alert_work); |
2764 | INIT_WORK(&data->report_work, lm90_report_alarms); |
2765 | |
2766 | /* Set the device type */ |
2767 | if (client->dev.of_node) |
2768 | data->kind = (uintptr_t)of_device_get_match_data(dev: &client->dev); |
2769 | else |
2770 | data->kind = i2c_match_id(id: lm90_id, client)->driver_data; |
2771 | |
2772 | /* |
2773 | * Different devices have different alarm bits triggering the |
2774 | * ALERT# output |
2775 | */ |
2776 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
2777 | data->resolution = lm90_params[data->kind].resolution ? : 11; |
2778 | |
2779 | /* Set chip capabilities */ |
2780 | data->flags = lm90_params[data->kind].flags; |
2781 | |
2782 | if ((data->flags & (LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC)) && |
2783 | !i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_PEC)) |
2784 | data->flags &= ~(LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC); |
2785 | |
2786 | if ((data->flags & LM90_HAVE_PARTIAL_PEC) && |
2787 | !i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE)) |
2788 | data->flags &= ~LM90_HAVE_PARTIAL_PEC; |
2789 | |
2790 | data->chip.ops = &lm90_ops; |
2791 | data->chip.info = data->info; |
2792 | |
2793 | data->info[0] = &data->chip_info; |
2794 | info = &data->chip_info; |
2795 | info->type = hwmon_chip; |
2796 | info->config = data->chip_config; |
2797 | |
2798 | data->chip_config[0] = HWMON_C_REGISTER_TZ; |
2799 | if (data->flags & LM90_HAVE_ALARMS) |
2800 | data->chip_config[0] |= HWMON_C_ALARMS; |
2801 | if (data->flags & LM90_HAVE_CONVRATE) |
2802 | data->chip_config[0] |= HWMON_C_UPDATE_INTERVAL; |
2803 | if (data->flags & LM90_HAVE_FAULTQUEUE) |
2804 | data->chip_config[0] |= HWMON_C_TEMP_SAMPLES; |
2805 | data->info[1] = &data->temp_info; |
2806 | |
2807 | info = &data->temp_info; |
2808 | info->type = hwmon_temp; |
2809 | info->config = data->channel_config; |
2810 | |
2811 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MAX | |
2812 | HWMON_T_MAX_ALARM; |
2813 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MAX | |
2814 | HWMON_T_MAX_ALARM | HWMON_T_FAULT; |
2815 | |
2816 | if (data->flags & LM90_HAVE_LOW) { |
2817 | data->channel_config[0] |= HWMON_T_MIN | HWMON_T_MIN_ALARM; |
2818 | data->channel_config[1] |= HWMON_T_MIN | HWMON_T_MIN_ALARM; |
2819 | } |
2820 | |
2821 | if (data->flags & LM90_HAVE_CRIT) { |
2822 | data->channel_config[0] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; |
2823 | data->channel_config[1] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; |
2824 | } |
2825 | |
2826 | if (data->flags & LM90_HAVE_OFFSET) |
2827 | data->channel_config[1] |= HWMON_T_OFFSET; |
2828 | |
2829 | if (data->flags & LM90_HAVE_EMERGENCY) { |
2830 | data->channel_config[0] |= HWMON_T_EMERGENCY | |
2831 | HWMON_T_EMERGENCY_HYST; |
2832 | data->channel_config[1] |= HWMON_T_EMERGENCY | |
2833 | HWMON_T_EMERGENCY_HYST; |
2834 | } |
2835 | |
2836 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { |
2837 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; |
2838 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; |
2839 | } |
2840 | |
2841 | if (data->flags & LM90_HAVE_TEMP3) { |
2842 | data->channel_config[2] = HWMON_T_INPUT | |
2843 | HWMON_T_MIN | HWMON_T_MAX | |
2844 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | |
2845 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | |
2846 | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; |
2847 | if (data->flags & LM90_HAVE_EMERGENCY) { |
2848 | data->channel_config[2] |= HWMON_T_EMERGENCY | |
2849 | HWMON_T_EMERGENCY_HYST; |
2850 | } |
2851 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) |
2852 | data->channel_config[2] |= HWMON_T_EMERGENCY_ALARM; |
2853 | if (data->flags & LM90_HAVE_OFFSET) |
2854 | data->channel_config[2] |= HWMON_T_OFFSET; |
2855 | } |
2856 | |
2857 | data->faultqueue_mask = lm90_params[data->kind].faultqueue_mask; |
2858 | data->faultqueue_depth = lm90_params[data->kind].faultqueue_depth; |
2859 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
2860 | if (data->flags & LM90_HAVE_REMOTE_EXT) |
2861 | data->reg_remote_ext = LM90_REG_REMOTE_TEMPL; |
2862 | data->reg_status2 = lm90_params[data->kind].reg_status2; |
2863 | |
2864 | /* Set maximum conversion rate */ |
2865 | data->max_convrate = lm90_params[data->kind].max_convrate; |
2866 | |
2867 | /* Parse device-tree channel information */ |
2868 | if (client->dev.of_node) { |
2869 | err = lm90_parse_dt_channel_info(client, data); |
2870 | if (err) |
2871 | return err; |
2872 | } |
2873 | |
2874 | /* Initialize the LM90 chip */ |
2875 | err = lm90_init_client(client, data); |
2876 | if (err < 0) { |
2877 | dev_err(dev, "Failed to initialize device\n" ); |
2878 | return err; |
2879 | } |
2880 | |
2881 | /* |
2882 | * The 'pec' attribute is attached to the i2c device and thus created |
2883 | * separately. |
2884 | */ |
2885 | if (data->flags & (LM90_HAVE_PEC | LM90_HAVE_PARTIAL_PEC)) { |
2886 | err = device_create_file(device: dev, entry: &dev_attr_pec); |
2887 | if (err) |
2888 | return err; |
2889 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
2890 | if (err) |
2891 | return err; |
2892 | } |
2893 | |
2894 | hwmon_dev = devm_hwmon_device_register_with_info(dev, name: client->name, |
2895 | drvdata: data, info: &data->chip, |
2896 | NULL); |
2897 | if (IS_ERR(ptr: hwmon_dev)) |
2898 | return PTR_ERR(ptr: hwmon_dev); |
2899 | |
2900 | data->hwmon_dev = hwmon_dev; |
2901 | |
2902 | if (client->irq) { |
2903 | dev_dbg(dev, "IRQ: %d\n" , client->irq); |
2904 | err = devm_request_threaded_irq(dev, irq: client->irq, |
2905 | NULL, thread_fn: lm90_irq_thread, |
2906 | IRQF_ONESHOT, devname: "lm90" , dev_id: client); |
2907 | if (err < 0) { |
2908 | dev_err(dev, "cannot request IRQ %d\n" , client->irq); |
2909 | return err; |
2910 | } |
2911 | } |
2912 | |
2913 | return 0; |
2914 | } |
2915 | |
2916 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
2917 | unsigned int flag) |
2918 | { |
2919 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
2920 | return; |
2921 | |
2922 | if (lm90_is_tripped(client)) { |
2923 | /* |
2924 | * Disable ALERT# output, because these chips don't implement |
2925 | * SMBus alert correctly; they should only hold the alert line |
2926 | * low briefly. |
2927 | */ |
2928 | struct lm90_data *data = i2c_get_clientdata(client); |
2929 | |
2930 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
2931 | (data->current_alarms & data->alert_alarms)) { |
2932 | if (!(data->config & 0x80)) { |
2933 | dev_dbg(&client->dev, "Disabling ALERT#\n" ); |
2934 | lm90_update_confreg(data, config: data->config | 0x80); |
2935 | } |
2936 | schedule_delayed_work(dwork: &data->alert_work, |
2937 | max_t(int, HZ, msecs_to_jiffies(data->update_interval))); |
2938 | } |
2939 | } else { |
2940 | dev_dbg(&client->dev, "Everything OK\n" ); |
2941 | } |
2942 | } |
2943 | |
2944 | static int lm90_suspend(struct device *dev) |
2945 | { |
2946 | struct lm90_data *data = dev_get_drvdata(dev); |
2947 | struct i2c_client *client = data->client; |
2948 | |
2949 | if (client->irq) |
2950 | disable_irq(irq: client->irq); |
2951 | |
2952 | return 0; |
2953 | } |
2954 | |
2955 | static int lm90_resume(struct device *dev) |
2956 | { |
2957 | struct lm90_data *data = dev_get_drvdata(dev); |
2958 | struct i2c_client *client = data->client; |
2959 | |
2960 | if (client->irq) |
2961 | enable_irq(irq: client->irq); |
2962 | |
2963 | return 0; |
2964 | } |
2965 | |
2966 | static DEFINE_SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume); |
2967 | |
2968 | static struct i2c_driver lm90_driver = { |
2969 | .class = I2C_CLASS_HWMON, |
2970 | .driver = { |
2971 | .name = "lm90" , |
2972 | .of_match_table = of_match_ptr(lm90_of_match), |
2973 | .pm = pm_sleep_ptr(&lm90_pm_ops), |
2974 | }, |
2975 | .probe = lm90_probe, |
2976 | .alert = lm90_alert, |
2977 | .id_table = lm90_id, |
2978 | .detect = lm90_detect, |
2979 | .address_list = normal_i2c, |
2980 | }; |
2981 | |
2982 | module_i2c_driver(lm90_driver); |
2983 | |
2984 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>" ); |
2985 | MODULE_DESCRIPTION("LM90/ADM1032 driver" ); |
2986 | MODULE_LICENSE("GPL" ); |
2987 | |