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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * lm90.c - Part of lm_sensors, Linux kernel modules for hardware | |
4 | * monitoring | |
7c81c60f | 5 | * Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de> |
1da177e4 LT |
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 | |
a874a10c | 10 | * temperature) and a 3-4 deg accuracy. |
1da177e4 LT |
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 | |
97ae60bb | 16 | * degrees, which allows for higher temperatures measurement. |
44bbe87e | 17 | * Note that there is no way to differentiate between both chips. |
97ae60bb | 18 | * When device is auto-detected, the driver will assume an LM99. |
1da177e4 LT |
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. | |
1da177e4 LT |
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 | |
a874a10c JD |
26 | * that are not handled by this driver. Among others, it has a higher |
27 | * accuracy than the LM90, much like the LM86 does. | |
1da177e4 LT |
28 | * |
29 | * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor | |
a874a10c | 30 | * chips made by Maxim. These chips are similar to the LM86. |
44bbe87e | 31 | * Note that there is no easy way to differentiate between the three |
6948708d GR |
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. | |
1da177e4 | 37 | * |
229d495d JL |
38 | * This driver also supports the MAX6654 chip made by Maxim. This chip can |
39 | * be at 9 different addresses, similar to MAX6680/MAX6681. The MAX6654 is | |
40 | * otherwise similar to MAX6657/MAX6658/MAX6659. Extended range is available | |
41 | * by setting the configuration register accordingly, and is done during | |
42 | * initialization. Extended precision is only available at conversion rates | |
43 | * of 1 Hz and slower. Note that extended precision is not enabled by | |
44 | * default, as this driver initializes all chips to 2 Hz by design. | |
45 | * | |
1a51e068 DW |
46 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
47 | * MAX6692 chips made by Maxim. These are again similar to the LM86, | |
48 | * but they use unsigned temperature values and can report temperatures | |
49 | * from 0 to 145 degrees. | |
271dabf5 | 50 | * |
32c82a93 RB |
51 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
52 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
53 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
54 | * be treated identically. | |
32c82a93 | 55 | * |
06e1c0a2 GR |
56 | * This driver also supports the MAX6695 and MAX6696, two other sensor |
57 | * chips made by Maxim. These are also quite similar to other Maxim | |
58 | * chips, but support three temperature sensors instead of two. MAX6695 | |
59 | * and MAX6696 only differ in the pinout so they can be treated identically. | |
60 | * | |
5a4e5e6a GR |
61 | * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as |
62 | * NCT1008 from ON Semiconductor. The chips are supported in both compatibility | |
63 | * and extended mode. They are mostly compatible with LM90 except for a data | |
64 | * format difference for the temperature value registers. | |
1da177e4 | 65 | * |
2ef01793 SD |
66 | * This driver also supports the SA56004 from Philips. This device is |
67 | * pin-compatible with the LM86, the ED/EDP parts are also address-compatible. | |
68 | * | |
ae544f64 GR |
69 | * This driver also supports the G781 from GMT. This device is compatible |
70 | * with the ADM1032. | |
71 | * | |
1daaceb2 WN |
72 | * This driver also supports TMP451 from Texas Instruments. This device is |
73 | * supported in both compatibility and extended mode. It's mostly compatible | |
74 | * with ADT7461 except for local temperature low byte register and max | |
75 | * conversion rate. | |
76 | * | |
1da177e4 LT |
77 | * Since the LM90 was the first chipset supported by this driver, most |
78 | * comments will refer to this chipset, but are actually general and | |
79 | * concern all supported chipsets, unless mentioned otherwise. | |
1da177e4 LT |
80 | */ |
81 | ||
1da177e4 LT |
82 | #include <linux/module.h> |
83 | #include <linux/init.h> | |
84 | #include <linux/slab.h> | |
85 | #include <linux/jiffies.h> | |
86 | #include <linux/i2c.h> | |
943b0830 MH |
87 | #include <linux/hwmon.h> |
88 | #include <linux/err.h> | |
9a61bf63 | 89 | #include <linux/mutex.h> |
df8d57bf | 90 | #include <linux/of_device.h> |
0e39e01c | 91 | #include <linux/sysfs.h> |
109b1283 | 92 | #include <linux/interrupt.h> |
3e0f964f | 93 | #include <linux/regulator/consumer.h> |
1da177e4 LT |
94 | |
95 | /* | |
96 | * Addresses to scan | |
97 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 98 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
99 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
100 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
101 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
102 | * have address 0x4d. | |
271dabf5 | 103 | * MAX6647 has address 0x4e. |
13c84951 | 104 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
229d495d JL |
105 | * MAX6654, MAX6680, and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, |
106 | * 0x2a, 0x2b, 0x4c, 0x4d or 0x4e. | |
2ef01793 | 107 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
108 | */ |
109 | ||
25e9c86d | 110 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
111 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
112 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 113 | |
13c84951 | 114 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
229d495d | 115 | max6646, w83l771, max6696, sa56004, g781, tmp451, max6654 }; |
1da177e4 LT |
116 | |
117 | /* | |
118 | * The LM90 registers | |
119 | */ | |
120 | ||
121 | #define LM90_REG_R_MAN_ID 0xFE | |
122 | #define LM90_REG_R_CHIP_ID 0xFF | |
123 | #define LM90_REG_R_CONFIG1 0x03 | |
124 | #define LM90_REG_W_CONFIG1 0x09 | |
125 | #define LM90_REG_R_CONFIG2 0xBF | |
126 | #define LM90_REG_W_CONFIG2 0xBF | |
127 | #define LM90_REG_R_CONVRATE 0x04 | |
128 | #define LM90_REG_W_CONVRATE 0x0A | |
129 | #define LM90_REG_R_STATUS 0x02 | |
130 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
131 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
132 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
133 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
134 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
135 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
136 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
137 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
138 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
139 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
140 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
141 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
142 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
143 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
144 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
145 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
146 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
147 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
148 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
149 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
150 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
151 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
152 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
153 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
154 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
155 | ||
229d495d | 156 | /* MAX6646/6647/6649/6654/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
157 | |
158 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 159 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
160 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
161 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
162 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
163 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 164 | |
2ef01793 SD |
165 | /* SA56004 registers */ |
166 | ||
167 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
168 | ||
0c01b644 GR |
169 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
170 | ||
1daaceb2 WN |
171 | /* TMP451 registers */ |
172 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 | |
173 | ||
23b2d477 NC |
174 | /* |
175 | * Device flags | |
176 | */ | |
88073bb1 GR |
177 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
178 | /* Device features */ | |
179 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 180 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 181 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
182 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
183 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 184 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
62456189 | 185 | #define LM90_PAUSE_FOR_CONFIG (1 << 8) /* Pause conversion for config */ |
23b2d477 | 186 | |
072de496 WN |
187 | /* LM90 status */ |
188 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
189 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
190 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
191 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
192 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
193 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
194 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
195 | ||
196 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
197 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
198 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
199 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
200 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
201 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
202 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Driver data (common to all clients) | |
206 | */ | |
207 | ||
9b0e8526 JD |
208 | static const struct i2c_device_id lm90_id[] = { |
209 | { "adm1032", adm1032 }, | |
210 | { "adt7461", adt7461 }, | |
5a4e5e6a | 211 | { "adt7461a", adt7461 }, |
ae544f64 | 212 | { "g781", g781 }, |
9b0e8526 JD |
213 | { "lm90", lm90 }, |
214 | { "lm86", lm86 }, | |
97ae60bb JD |
215 | { "lm89", lm86 }, |
216 | { "lm99", lm99 }, | |
271dabf5 BH |
217 | { "max6646", max6646 }, |
218 | { "max6647", max6646 }, | |
219 | { "max6649", max6646 }, | |
229d495d | 220 | { "max6654", max6654 }, |
9b0e8526 JD |
221 | { "max6657", max6657 }, |
222 | { "max6658", max6657 }, | |
13c84951 | 223 | { "max6659", max6659 }, |
9b0e8526 JD |
224 | { "max6680", max6680 }, |
225 | { "max6681", max6680 }, | |
06e1c0a2 GR |
226 | { "max6695", max6696 }, |
227 | { "max6696", max6696 }, | |
5a4e5e6a | 228 | { "nct1008", adt7461 }, |
6771ea1f | 229 | { "w83l771", w83l771 }, |
2ef01793 | 230 | { "sa56004", sa56004 }, |
1daaceb2 | 231 | { "tmp451", tmp451 }, |
9b0e8526 JD |
232 | { } |
233 | }; | |
234 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
235 | ||
787afaa3 | 236 | static const struct of_device_id __maybe_unused lm90_of_match[] = { |
df8d57bf JMC |
237 | { |
238 | .compatible = "adi,adm1032", | |
239 | .data = (void *)adm1032 | |
240 | }, | |
241 | { | |
242 | .compatible = "adi,adt7461", | |
243 | .data = (void *)adt7461 | |
244 | }, | |
245 | { | |
246 | .compatible = "adi,adt7461a", | |
247 | .data = (void *)adt7461 | |
248 | }, | |
249 | { | |
250 | .compatible = "gmt,g781", | |
251 | .data = (void *)g781 | |
252 | }, | |
253 | { | |
254 | .compatible = "national,lm90", | |
255 | .data = (void *)lm90 | |
256 | }, | |
257 | { | |
258 | .compatible = "national,lm86", | |
259 | .data = (void *)lm86 | |
260 | }, | |
261 | { | |
262 | .compatible = "national,lm89", | |
263 | .data = (void *)lm86 | |
264 | }, | |
265 | { | |
266 | .compatible = "national,lm99", | |
267 | .data = (void *)lm99 | |
268 | }, | |
269 | { | |
270 | .compatible = "dallas,max6646", | |
271 | .data = (void *)max6646 | |
272 | }, | |
273 | { | |
274 | .compatible = "dallas,max6647", | |
275 | .data = (void *)max6646 | |
276 | }, | |
277 | { | |
278 | .compatible = "dallas,max6649", | |
279 | .data = (void *)max6646 | |
280 | }, | |
229d495d JL |
281 | { |
282 | .compatible = "dallas,max6654", | |
283 | .data = (void *)max6654 | |
284 | }, | |
df8d57bf JMC |
285 | { |
286 | .compatible = "dallas,max6657", | |
287 | .data = (void *)max6657 | |
288 | }, | |
289 | { | |
290 | .compatible = "dallas,max6658", | |
291 | .data = (void *)max6657 | |
292 | }, | |
293 | { | |
294 | .compatible = "dallas,max6659", | |
295 | .data = (void *)max6659 | |
296 | }, | |
297 | { | |
298 | .compatible = "dallas,max6680", | |
299 | .data = (void *)max6680 | |
300 | }, | |
301 | { | |
302 | .compatible = "dallas,max6681", | |
303 | .data = (void *)max6680 | |
304 | }, | |
305 | { | |
306 | .compatible = "dallas,max6695", | |
307 | .data = (void *)max6696 | |
308 | }, | |
309 | { | |
310 | .compatible = "dallas,max6696", | |
311 | .data = (void *)max6696 | |
312 | }, | |
313 | { | |
314 | .compatible = "onnn,nct1008", | |
315 | .data = (void *)adt7461 | |
316 | }, | |
317 | { | |
318 | .compatible = "winbond,w83l771", | |
319 | .data = (void *)w83l771 | |
320 | }, | |
321 | { | |
322 | .compatible = "nxp,sa56004", | |
323 | .data = (void *)sa56004 | |
324 | }, | |
325 | { | |
326 | .compatible = "ti,tmp451", | |
327 | .data = (void *)tmp451 | |
328 | }, | |
329 | { }, | |
330 | }; | |
331 | MODULE_DEVICE_TABLE(of, lm90_of_match); | |
332 | ||
4667bcb8 GR |
333 | /* |
334 | * chip type specific parameters | |
335 | */ | |
336 | struct lm90_params { | |
337 | u32 flags; /* Capabilities */ | |
338 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
339 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 340 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 341 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
342 | }; |
343 | ||
344 | static const struct lm90_params lm90_params[] = { | |
345 | [adm1032] = { | |
1179324c GR |
346 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
347 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 348 | .alert_alarms = 0x7c, |
0c01b644 | 349 | .max_convrate = 10, |
4667bcb8 GR |
350 | }, |
351 | [adt7461] = { | |
1179324c GR |
352 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
353 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 354 | .alert_alarms = 0x7c, |
0c01b644 | 355 | .max_convrate = 10, |
4667bcb8 | 356 | }, |
ae544f64 GR |
357 | [g781] = { |
358 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
359 | | LM90_HAVE_BROKEN_ALERT, | |
360 | .alert_alarms = 0x7c, | |
361 | .max_convrate = 8, | |
362 | }, | |
4667bcb8 GR |
363 | [lm86] = { |
364 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
365 | .alert_alarms = 0x7b, | |
0c01b644 | 366 | .max_convrate = 9, |
4667bcb8 GR |
367 | }, |
368 | [lm90] = { | |
369 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
370 | .alert_alarms = 0x7b, | |
0c01b644 | 371 | .max_convrate = 9, |
4667bcb8 GR |
372 | }, |
373 | [lm99] = { | |
374 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
375 | .alert_alarms = 0x7b, | |
0c01b644 | 376 | .max_convrate = 9, |
4667bcb8 GR |
377 | }, |
378 | [max6646] = { | |
4667bcb8 | 379 | .alert_alarms = 0x7c, |
0c01b644 | 380 | .max_convrate = 6, |
2ef01793 | 381 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 | 382 | }, |
229d495d JL |
383 | [max6654] = { |
384 | .alert_alarms = 0x7c, | |
385 | .max_convrate = 7, | |
386 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, | |
387 | }, | |
4667bcb8 | 388 | [max6657] = { |
62456189 | 389 | .flags = LM90_PAUSE_FOR_CONFIG, |
4667bcb8 | 390 | .alert_alarms = 0x7c, |
0c01b644 | 391 | .max_convrate = 8, |
2ef01793 | 392 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
393 | }, |
394 | [max6659] = { | |
a095f687 | 395 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 396 | .alert_alarms = 0x7c, |
0c01b644 | 397 | .max_convrate = 8, |
2ef01793 | 398 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
399 | }, |
400 | [max6680] = { | |
401 | .flags = LM90_HAVE_OFFSET, | |
402 | .alert_alarms = 0x7c, | |
0c01b644 | 403 | .max_convrate = 7, |
4667bcb8 GR |
404 | }, |
405 | [max6696] = { | |
a095f687 | 406 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 407 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 408 | .alert_alarms = 0x1c7c, |
0c01b644 | 409 | .max_convrate = 6, |
2ef01793 | 410 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
411 | }, |
412 | [w83l771] = { | |
413 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
414 | .alert_alarms = 0x7c, | |
0c01b644 | 415 | .max_convrate = 8, |
4667bcb8 | 416 | }, |
2ef01793 | 417 | [sa56004] = { |
a095f687 | 418 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
419 | .alert_alarms = 0x7b, |
420 | .max_convrate = 9, | |
421 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
422 | }, | |
1daaceb2 WN |
423 | [tmp451] = { |
424 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
425 | | LM90_HAVE_BROKEN_ALERT, | |
426 | .alert_alarms = 0x7c, | |
427 | .max_convrate = 9, | |
428 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
eb1c8f43 | 429 | }, |
4667bcb8 GR |
430 | }; |
431 | ||
40465d94 WN |
432 | /* |
433 | * TEMP8 register index | |
434 | */ | |
435 | enum lm90_temp8_reg_index { | |
436 | LOCAL_LOW = 0, | |
437 | LOCAL_HIGH, | |
438 | LOCAL_CRIT, | |
439 | REMOTE_CRIT, | |
440 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
441 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
442 | REMOTE2_CRIT, /* max6695/96 only */ | |
443 | REMOTE2_EMERG, /* max6695/96 only */ | |
444 | TEMP8_REG_NUM | |
445 | }; | |
446 | ||
447 | /* | |
448 | * TEMP11 register index | |
449 | */ | |
450 | enum lm90_temp11_reg_index { | |
451 | REMOTE_TEMP = 0, | |
452 | REMOTE_LOW, | |
453 | REMOTE_HIGH, | |
454 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
455 | LOCAL_TEMP, | |
456 | REMOTE2_TEMP, /* max6695/96 only */ | |
457 | REMOTE2_LOW, /* max6695/96 only */ | |
458 | REMOTE2_HIGH, /* max6695/96 only */ | |
459 | TEMP11_REG_NUM | |
460 | }; | |
461 | ||
1da177e4 LT |
462 | /* |
463 | * Client data (each client gets its own) | |
464 | */ | |
465 | ||
466 | struct lm90_data { | |
1de8b250 | 467 | struct i2c_client *client; |
eb1c8f43 GR |
468 | u32 channel_config[4]; |
469 | struct hwmon_channel_info temp_info; | |
470 | const struct hwmon_channel_info *info[3]; | |
471 | struct hwmon_chip_info chip; | |
9a61bf63 | 472 | struct mutex update_lock; |
2f83ab77 | 473 | bool valid; /* true if register values are valid */ |
1da177e4 LT |
474 | unsigned long last_updated; /* in jiffies */ |
475 | int kind; | |
4667bcb8 | 476 | u32 flags; |
1da177e4 | 477 | |
38bab98a | 478 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 479 | |
b849e5d1 | 480 | u8 config; /* Current configuration register value */ |
95238364 | 481 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 482 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
483 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
484 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 485 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 486 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 487 | |
1da177e4 | 488 | /* registers values */ |
40465d94 WN |
489 | s8 temp8[TEMP8_REG_NUM]; |
490 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 491 | u8 temp_hyst; |
06e1c0a2 | 492 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
493 | }; |
494 | ||
15b66ab6 GR |
495 | /* |
496 | * Support functions | |
497 | */ | |
498 | ||
499 | /* | |
500 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
501 | * to explicitly ask for a transaction without PEC. | |
502 | */ | |
503 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
504 | { | |
505 | return i2c_smbus_xfer(client->adapter, client->addr, | |
506 | client->flags & ~I2C_CLIENT_PEC, | |
507 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
508 | } | |
509 | ||
510 | /* | |
511 | * It is assumed that client->update_lock is held (unless we are in | |
512 | * detection or initialization steps). This matters when PEC is enabled, | |
513 | * because we don't want the address pointer to change between the write | |
514 | * byte and the read byte transactions. | |
515 | */ | |
37ad04d7 | 516 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
517 | { |
518 | int err; | |
519 | ||
520 | if (client->flags & I2C_CLIENT_PEC) { | |
521 | err = adm1032_write_byte(client, reg); | |
522 | if (err >= 0) | |
523 | err = i2c_smbus_read_byte(client); | |
524 | } else | |
525 | err = i2c_smbus_read_byte_data(client, reg); | |
526 | ||
37ad04d7 | 527 | return err; |
15b66ab6 GR |
528 | } |
529 | ||
37ad04d7 | 530 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 531 | { |
37ad04d7 | 532 | int oldh, newh, l; |
15b66ab6 GR |
533 | |
534 | /* | |
535 | * There is a trick here. We have to read two registers to have the | |
536 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 537 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
538 | * the one-shot conversion register, which we don't want to do |
539 | * (disables hardware monitoring) or monitor the busy bit, which is | |
540 | * impossible (we can't read the values and monitor that bit at the | |
541 | * exact same time). So the solution used here is to read the high | |
542 | * byte once, then the low byte, then the high byte again. If the new | |
543 | * high byte matches the old one, then we have a valid reading. Else | |
544 | * we have to read the low byte again, and now we believe we have a | |
545 | * correct reading. | |
546 | */ | |
37ad04d7 GR |
547 | oldh = lm90_read_reg(client, regh); |
548 | if (oldh < 0) | |
549 | return oldh; | |
550 | l = lm90_read_reg(client, regl); | |
551 | if (l < 0) | |
552 | return l; | |
553 | newh = lm90_read_reg(client, regh); | |
554 | if (newh < 0) | |
555 | return newh; | |
15b66ab6 | 556 | if (oldh != newh) { |
37ad04d7 GR |
557 | l = lm90_read_reg(client, regl); |
558 | if (l < 0) | |
559 | return l; | |
15b66ab6 | 560 | } |
37ad04d7 | 561 | return (newh << 8) | l; |
15b66ab6 GR |
562 | } |
563 | ||
7a1d220c GR |
564 | static int lm90_update_confreg(struct lm90_data *data, u8 config) |
565 | { | |
566 | if (data->config != config) { | |
567 | int err; | |
568 | ||
569 | err = i2c_smbus_write_byte_data(data->client, | |
570 | LM90_REG_W_CONFIG1, | |
571 | config); | |
572 | if (err) | |
573 | return err; | |
574 | data->config = config; | |
575 | } | |
576 | return 0; | |
577 | } | |
578 | ||
15b66ab6 GR |
579 | /* |
580 | * client->update_lock must be held when calling this function (unless we are | |
581 | * in detection or initialization steps), and while a remote channel other | |
582 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
583 | * external channel 0 before releasing the lock. This is necessary because | |
584 | * various registers have different meanings as a result of selecting a | |
585 | * non-default remote channel. | |
586 | */ | |
7a1d220c | 587 | static int lm90_select_remote_channel(struct lm90_data *data, int channel) |
15b66ab6 | 588 | { |
7a1d220c GR |
589 | int err = 0; |
590 | ||
15b66ab6 | 591 | if (data->kind == max6696) { |
b849e5d1 | 592 | u8 config = data->config & ~0x08; |
b849e5d1 | 593 | |
15b66ab6 GR |
594 | if (channel) |
595 | config |= 0x08; | |
7a1d220c | 596 | err = lm90_update_confreg(data, config); |
15b66ab6 | 597 | } |
7a1d220c | 598 | return err; |
15b66ab6 GR |
599 | } |
600 | ||
7a1d220c | 601 | static int lm90_write_convrate(struct lm90_data *data, int val) |
62456189 | 602 | { |
b849e5d1 | 603 | u8 config = data->config; |
62456189 | 604 | int err; |
62456189 BY |
605 | |
606 | /* Save config and pause conversion */ | |
607 | if (data->flags & LM90_PAUSE_FOR_CONFIG) { | |
7a1d220c GR |
608 | err = lm90_update_confreg(data, config | 0x40); |
609 | if (err < 0) | |
610 | return err; | |
62456189 BY |
611 | } |
612 | ||
613 | /* Set conv rate */ | |
7a1d220c | 614 | err = i2c_smbus_write_byte_data(data->client, LM90_REG_W_CONVRATE, val); |
62456189 BY |
615 | |
616 | /* Revert change to config */ | |
7a1d220c | 617 | lm90_update_confreg(data, config); |
62456189 BY |
618 | |
619 | return err; | |
620 | } | |
621 | ||
0c01b644 GR |
622 | /* |
623 | * Set conversion rate. | |
624 | * client->update_lock must be held when calling this function (unless we are | |
625 | * in detection or initialization steps). | |
626 | */ | |
eb1c8f43 GR |
627 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
628 | unsigned int interval) | |
0c01b644 | 629 | { |
0c01b644 | 630 | unsigned int update_interval; |
eb1c8f43 | 631 | int i, err; |
0c01b644 GR |
632 | |
633 | /* Shift calculations to avoid rounding errors */ | |
634 | interval <<= 6; | |
635 | ||
636 | /* find the nearest update rate */ | |
637 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
638 | i < data->max_convrate; i++, update_interval >>= 1) | |
639 | if (interval >= update_interval * 3 / 4) | |
640 | break; | |
641 | ||
7a1d220c | 642 | err = lm90_write_convrate(data, i); |
0c01b644 | 643 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
eb1c8f43 | 644 | return err; |
0c01b644 GR |
645 | } |
646 | ||
10bfef47 GR |
647 | static int lm90_update_limits(struct device *dev) |
648 | { | |
649 | struct lm90_data *data = dev_get_drvdata(dev); | |
650 | struct i2c_client *client = data->client; | |
651 | int val; | |
652 | ||
653 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
654 | if (val < 0) | |
655 | return val; | |
656 | data->temp8[LOCAL_CRIT] = val; | |
657 | ||
658 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
659 | if (val < 0) | |
660 | return val; | |
661 | data->temp8[REMOTE_CRIT] = val; | |
662 | ||
663 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); | |
664 | if (val < 0) | |
665 | return val; | |
666 | data->temp_hyst = val; | |
667 | ||
be9d6374 | 668 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); |
10bfef47 GR |
669 | if (val < 0) |
670 | return val; | |
671 | data->temp11[REMOTE_LOW] = val << 8; | |
672 | ||
673 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
674 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
675 | if (val < 0) | |
676 | return val; | |
677 | data->temp11[REMOTE_LOW] |= val; | |
678 | } | |
679 | ||
680 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
681 | if (val < 0) | |
682 | return val; | |
683 | data->temp11[REMOTE_HIGH] = val << 8; | |
684 | ||
685 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
686 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
687 | if (val < 0) | |
688 | return val; | |
689 | data->temp11[REMOTE_HIGH] |= val; | |
690 | } | |
691 | ||
692 | if (data->flags & LM90_HAVE_OFFSET) { | |
693 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
694 | LM90_REG_R_REMOTE_OFFSL); | |
695 | if (val < 0) | |
696 | return val; | |
697 | data->temp11[REMOTE_OFFSET] = val; | |
698 | } | |
699 | ||
700 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
701 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
702 | if (val < 0) | |
703 | return val; | |
704 | data->temp8[LOCAL_EMERG] = val; | |
705 | ||
706 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
707 | if (val < 0) | |
708 | return val; | |
709 | data->temp8[REMOTE_EMERG] = val; | |
710 | } | |
711 | ||
712 | if (data->kind == max6696) { | |
7a1d220c | 713 | val = lm90_select_remote_channel(data, 1); |
10bfef47 GR |
714 | if (val < 0) |
715 | return val; | |
716 | ||
717 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
718 | if (val < 0) | |
719 | return val; | |
720 | data->temp8[REMOTE2_CRIT] = val; | |
721 | ||
722 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
723 | if (val < 0) | |
724 | return val; | |
725 | data->temp8[REMOTE2_EMERG] = val; | |
726 | ||
727 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
728 | if (val < 0) | |
729 | return val; | |
730 | data->temp11[REMOTE2_LOW] = val << 8; | |
731 | ||
732 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
733 | if (val < 0) | |
734 | return val; | |
735 | data->temp11[REMOTE2_HIGH] = val << 8; | |
736 | ||
7a1d220c | 737 | lm90_select_remote_channel(data, 0); |
10bfef47 GR |
738 | } |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
eb1c8f43 | 743 | static int lm90_update_device(struct device *dev) |
15b66ab6 | 744 | { |
1de8b250 GR |
745 | struct lm90_data *data = dev_get_drvdata(dev); |
746 | struct i2c_client *client = data->client; | |
0c01b644 | 747 | unsigned long next_update; |
eb1c8f43 | 748 | int val; |
15b66ab6 | 749 | |
10bfef47 GR |
750 | if (!data->valid) { |
751 | val = lm90_update_limits(dev); | |
752 | if (val < 0) | |
eb1c8f43 | 753 | return val; |
10bfef47 GR |
754 | } |
755 | ||
78c2c2fe JD |
756 | next_update = data->last_updated + |
757 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 758 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 759 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 760 | |
2f83ab77 | 761 | data->valid = false; |
10bfef47 | 762 | |
37ad04d7 GR |
763 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
764 | if (val < 0) | |
eb1c8f43 | 765 | return val; |
37ad04d7 GR |
766 | data->temp8[LOCAL_LOW] = val; |
767 | ||
768 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
769 | if (val < 0) | |
eb1c8f43 | 770 | return val; |
37ad04d7 GR |
771 | data->temp8[LOCAL_HIGH] = val; |
772 | ||
a095f687 | 773 | if (data->reg_local_ext) { |
37ad04d7 GR |
774 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
775 | data->reg_local_ext); | |
776 | if (val < 0) | |
eb1c8f43 | 777 | return val; |
37ad04d7 | 778 | data->temp11[LOCAL_TEMP] = val; |
15b66ab6 | 779 | } else { |
37ad04d7 GR |
780 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
781 | if (val < 0) | |
eb1c8f43 | 782 | return val; |
37ad04d7 | 783 | data->temp11[LOCAL_TEMP] = val << 8; |
15b66ab6 | 784 | } |
37ad04d7 GR |
785 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
786 | LM90_REG_R_REMOTE_TEMPL); | |
787 | if (val < 0) | |
eb1c8f43 | 788 | return val; |
37ad04d7 GR |
789 | data->temp11[REMOTE_TEMP] = val; |
790 | ||
37ad04d7 GR |
791 | val = lm90_read_reg(client, LM90_REG_R_STATUS); |
792 | if (val < 0) | |
eb1c8f43 | 793 | return val; |
37ad04d7 | 794 | data->alarms = val; /* lower 8 bit of alarms */ |
15b66ab6 GR |
795 | |
796 | if (data->kind == max6696) { | |
7a1d220c | 797 | val = lm90_select_remote_channel(data, 1); |
37ad04d7 | 798 | if (val < 0) |
eb1c8f43 | 799 | return val; |
37ad04d7 | 800 | |
37ad04d7 GR |
801 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
802 | LM90_REG_R_REMOTE_TEMPL); | |
eb1c8f43 | 803 | if (val < 0) { |
7a1d220c | 804 | lm90_select_remote_channel(data, 0); |
eb1c8f43 GR |
805 | return val; |
806 | } | |
37ad04d7 GR |
807 | data->temp11[REMOTE2_TEMP] = val; |
808 | ||
7a1d220c | 809 | lm90_select_remote_channel(data, 0); |
15b66ab6 | 810 | |
37ad04d7 GR |
811 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); |
812 | if (val < 0) | |
eb1c8f43 | 813 | return val; |
37ad04d7 | 814 | data->alarms |= val << 8; |
15b66ab6 GR |
815 | } |
816 | ||
f36ffeab GR |
817 | /* |
818 | * Re-enable ALERT# output if it was originally enabled and | |
819 | * relevant alarms are all clear | |
820 | */ | |
37ad04d7 GR |
821 | if (!(data->config_orig & 0x80) && |
822 | !(data->alarms & data->alert_alarms)) { | |
b849e5d1 | 823 | if (data->config & 0x80) { |
15b66ab6 | 824 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); |
7a1d220c | 825 | lm90_update_confreg(data, data->config & ~0x80); |
15b66ab6 GR |
826 | } |
827 | } | |
828 | ||
829 | data->last_updated = jiffies; | |
2f83ab77 | 830 | data->valid = true; |
15b66ab6 GR |
831 | } |
832 | ||
eb1c8f43 | 833 | return 0; |
15b66ab6 GR |
834 | } |
835 | ||
cea50fe2 NC |
836 | /* |
837 | * Conversions | |
838 | * For local temperatures and limits, critical limits and the hysteresis | |
839 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
840 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
841 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
842 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
843 | */ |
844 | ||
9d4d3834 | 845 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
846 | { |
847 | return val * 1000; | |
848 | } | |
849 | ||
271dabf5 BH |
850 | static inline int temp_from_u8(u8 val) |
851 | { | |
852 | return val * 1000; | |
853 | } | |
854 | ||
9d4d3834 | 855 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
856 | { |
857 | return val / 32 * 125; | |
858 | } | |
859 | ||
271dabf5 BH |
860 | static inline int temp_from_u16(u16 val) |
861 | { | |
862 | return val / 32 * 125; | |
863 | } | |
864 | ||
9d4d3834 | 865 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
866 | { |
867 | if (val <= -128000) | |
868 | return -128; | |
869 | if (val >= 127000) | |
870 | return 127; | |
871 | if (val < 0) | |
872 | return (val - 500) / 1000; | |
873 | return (val + 500) / 1000; | |
874 | } | |
875 | ||
271dabf5 BH |
876 | static u8 temp_to_u8(long val) |
877 | { | |
878 | if (val <= 0) | |
879 | return 0; | |
880 | if (val >= 255000) | |
881 | return 255; | |
882 | return (val + 500) / 1000; | |
883 | } | |
884 | ||
9d4d3834 | 885 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
886 | { |
887 | if (val <= -128000) | |
888 | return 0x8000; | |
889 | if (val >= 127875) | |
890 | return 0x7FE0; | |
891 | if (val < 0) | |
892 | return (val - 62) / 125 * 32; | |
893 | return (val + 62) / 125 * 32; | |
894 | } | |
895 | ||
896 | static u8 hyst_to_reg(long val) | |
897 | { | |
898 | if (val <= 0) | |
899 | return 0; | |
900 | if (val >= 30500) | |
901 | return 31; | |
902 | return (val + 500) / 1000; | |
903 | } | |
904 | ||
905 | /* | |
23b2d477 NC |
906 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
907 | * attempts to write values that are outside the range 0 < temp < 127 are | |
908 | * treated as the boundary value. | |
909 | * | |
910 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
911 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 912 | */ |
9d4d3834 | 913 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 914 | { |
23b2d477 NC |
915 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
916 | return (val - 64) * 1000; | |
589f707c | 917 | return temp_from_s8(val); |
cea50fe2 NC |
918 | } |
919 | ||
9d4d3834 | 920 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 921 | { |
23b2d477 NC |
922 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
923 | return (val - 0x4000) / 64 * 250; | |
589f707c | 924 | return temp_from_s16(val); |
23b2d477 NC |
925 | } |
926 | ||
9d4d3834 | 927 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
928 | { |
929 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
930 | if (val <= -64000) | |
931 | return 0; | |
932 | if (val >= 191000) | |
933 | return 0xFF; | |
934 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 935 | } |
589f707c GR |
936 | if (val <= 0) |
937 | return 0; | |
938 | if (val >= 127000) | |
939 | return 127; | |
940 | return (val + 500) / 1000; | |
23b2d477 NC |
941 | } |
942 | ||
9d4d3834 | 943 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
944 | { |
945 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
946 | if (val <= -64000) | |
947 | return 0; | |
948 | if (val >= 191750) | |
949 | return 0xFFC0; | |
950 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 951 | } |
589f707c GR |
952 | if (val <= 0) |
953 | return 0; | |
954 | if (val >= 127750) | |
955 | return 0x7FC0; | |
956 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
957 | } |
958 | ||
eb1c8f43 | 959 | /* pec used for ADM1032 only */ |
e57959a6 | 960 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
eb1c8f43 | 961 | char *buf) |
30d7394b | 962 | { |
eb1c8f43 | 963 | struct i2c_client *client = to_i2c_client(dev); |
97ae60bb | 964 | |
eb1c8f43 | 965 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
30d7394b JD |
966 | } |
967 | ||
e57959a6 JL |
968 | static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
969 | const char *buf, size_t count) | |
30d7394b | 970 | { |
eb1c8f43 | 971 | struct i2c_client *client = to_i2c_client(dev); |
11e57812 GR |
972 | long val; |
973 | int err; | |
974 | ||
179c4fdb | 975 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
976 | if (err < 0) |
977 | return err; | |
30d7394b | 978 | |
eb1c8f43 GR |
979 | switch (val) { |
980 | case 0: | |
981 | client->flags &= ~I2C_CLIENT_PEC; | |
982 | break; | |
983 | case 1: | |
984 | client->flags |= I2C_CLIENT_PEC; | |
985 | break; | |
986 | default: | |
987 | return -EINVAL; | |
988 | } | |
06e1c0a2 | 989 | |
30d7394b | 990 | return count; |
1da177e4 | 991 | } |
30d7394b | 992 | |
e57959a6 | 993 | static DEVICE_ATTR_RW(pec); |
eb1c8f43 GR |
994 | |
995 | static int lm90_get_temp11(struct lm90_data *data, int index) | |
30d7394b | 996 | { |
eb1c8f43 | 997 | s16 temp11 = data->temp11[index]; |
23b2d477 NC |
998 | int temp; |
999 | ||
1daaceb2 | 1000 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 1001 | temp = temp_from_u16_adt7461(data, temp11); |
271dabf5 | 1002 | else if (data->kind == max6646) |
eb1c8f43 | 1003 | temp = temp_from_u16(temp11); |
23b2d477 | 1004 | else |
eb1c8f43 | 1005 | temp = temp_from_s16(temp11); |
23b2d477 | 1006 | |
97ae60bb | 1007 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1008 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
1009 | temp += 16000; |
1010 | ||
eb1c8f43 | 1011 | return temp; |
1da177e4 | 1012 | } |
30d7394b | 1013 | |
eb1c8f43 | 1014 | static int lm90_set_temp11(struct lm90_data *data, int index, long val) |
30d7394b | 1015 | { |
eb1c8f43 | 1016 | static struct reg { |
96512861 GR |
1017 | u8 high; |
1018 | u8 low; | |
eb1c8f43 GR |
1019 | } reg[] = { |
1020 | [REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1021 | [REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }, | |
1022 | [REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL }, | |
1023 | [REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1024 | [REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL } | |
30d7394b | 1025 | }; |
1de8b250 | 1026 | struct i2c_client *client = data->client; |
eb1c8f43 | 1027 | struct reg *regp = ®[index]; |
11e57812 GR |
1028 | int err; |
1029 | ||
97ae60bb | 1030 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 1031 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
1032 | val -= 16000; |
1033 | ||
1daaceb2 | 1034 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 1035 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 1036 | else if (data->kind == max6646) |
96512861 | 1037 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 1038 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 1039 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 1040 | else |
96512861 | 1041 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 1042 | |
7a1d220c | 1043 | lm90_select_remote_channel(data, index >= 3); |
eb1c8f43 | 1044 | err = i2c_smbus_write_byte_data(client, regp->high, |
96512861 | 1045 | data->temp11[index] >> 8); |
eb1c8f43 GR |
1046 | if (err < 0) |
1047 | return err; | |
88073bb1 | 1048 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
eb1c8f43 GR |
1049 | err = i2c_smbus_write_byte_data(client, regp->low, |
1050 | data->temp11[index] & 0xff); | |
06e1c0a2 | 1051 | |
7a1d220c | 1052 | lm90_select_remote_channel(data, 0); |
eb1c8f43 | 1053 | return err; |
1da177e4 | 1054 | } |
30d7394b | 1055 | |
eb1c8f43 | 1056 | static int lm90_get_temp8(struct lm90_data *data, int index) |
30d7394b | 1057 | { |
eb1c8f43 | 1058 | s8 temp8 = data->temp8[index]; |
23b2d477 NC |
1059 | int temp; |
1060 | ||
1daaceb2 | 1061 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 1062 | temp = temp_from_u8_adt7461(data, temp8); |
ec38fa2b | 1063 | else if (data->kind == max6646) |
eb1c8f43 | 1064 | temp = temp_from_u8(temp8); |
23b2d477 | 1065 | else |
eb1c8f43 | 1066 | temp = temp_from_s8(temp8); |
23b2d477 | 1067 | |
97ae60bb | 1068 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1069 | if (data->kind == lm99 && index == 3) |
97ae60bb JD |
1070 | temp += 16000; |
1071 | ||
eb1c8f43 | 1072 | return temp; |
1da177e4 | 1073 | } |
1da177e4 | 1074 | |
eb1c8f43 | 1075 | static int lm90_set_temp8(struct lm90_data *data, int index, long val) |
1da177e4 | 1076 | { |
eb1c8f43 GR |
1077 | static const u8 reg[TEMP8_REG_NUM] = { |
1078 | LM90_REG_W_LOCAL_LOW, | |
1079 | LM90_REG_W_LOCAL_HIGH, | |
1080 | LM90_REG_W_LOCAL_CRIT, | |
1081 | LM90_REG_W_REMOTE_CRIT, | |
1082 | MAX6659_REG_W_LOCAL_EMERG, | |
1083 | MAX6659_REG_W_REMOTE_EMERG, | |
1084 | LM90_REG_W_REMOTE_CRIT, | |
1085 | MAX6659_REG_W_REMOTE_EMERG, | |
1086 | }; | |
1de8b250 | 1087 | struct i2c_client *client = data->client; |
11e57812 | 1088 | int err; |
1da177e4 | 1089 | |
eb1c8f43 GR |
1090 | /* +16 degrees offset for temp2 for the LM99 */ |
1091 | if (data->kind == lm99 && index == 3) | |
1092 | val -= 16000; | |
11e57812 | 1093 | |
1daaceb2 | 1094 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 1095 | data->temp8[index] = temp_to_u8_adt7461(data, val); |
ec38fa2b | 1096 | else if (data->kind == max6646) |
eb1c8f43 | 1097 | data->temp8[index] = temp_to_u8(val); |
ec38fa2b | 1098 | else |
eb1c8f43 | 1099 | data->temp8[index] = temp_to_s8(val); |
ec38fa2b | 1100 | |
7a1d220c | 1101 | lm90_select_remote_channel(data, index >= 6); |
eb1c8f43 | 1102 | err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]); |
7a1d220c | 1103 | lm90_select_remote_channel(data, 0); |
37ad04d7 | 1104 | |
eb1c8f43 | 1105 | return err; |
1da177e4 LT |
1106 | } |
1107 | ||
eb1c8f43 | 1108 | static int lm90_get_temphyst(struct lm90_data *data, int index) |
2d45771e | 1109 | { |
eb1c8f43 | 1110 | int temp; |
37ad04d7 | 1111 | |
eb1c8f43 GR |
1112 | if (data->kind == adt7461 || data->kind == tmp451) |
1113 | temp = temp_from_u8_adt7461(data, data->temp8[index]); | |
1114 | else if (data->kind == max6646) | |
1115 | temp = temp_from_u8(data->temp8[index]); | |
1116 | else | |
1117 | temp = temp_from_s8(data->temp8[index]); | |
2d45771e | 1118 | |
eb1c8f43 GR |
1119 | /* +16 degrees offset for temp2 for the LM99 */ |
1120 | if (data->kind == lm99 && index == 3) | |
1121 | temp += 16000; | |
0c01b644 | 1122 | |
eb1c8f43 | 1123 | return temp - temp_from_s8(data->temp_hyst); |
0c01b644 GR |
1124 | } |
1125 | ||
eb1c8f43 | 1126 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
0c01b644 | 1127 | { |
1de8b250 | 1128 | struct i2c_client *client = data->client; |
eb1c8f43 | 1129 | int temp; |
0c01b644 GR |
1130 | int err; |
1131 | ||
eb1c8f43 GR |
1132 | if (data->kind == adt7461 || data->kind == tmp451) |
1133 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); | |
1134 | else if (data->kind == max6646) | |
1135 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); | |
1136 | else | |
1137 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); | |
0c01b644 | 1138 | |
eb1c8f43 GR |
1139 | data->temp_hyst = hyst_to_reg(temp - val); |
1140 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, | |
1141 | data->temp_hyst); | |
1142 | return err; | |
0c01b644 GR |
1143 | } |
1144 | ||
eb1c8f43 GR |
1145 | static const u8 lm90_temp_index[3] = { |
1146 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP | |
0e39e01c JD |
1147 | }; |
1148 | ||
eb1c8f43 GR |
1149 | static const u8 lm90_temp_min_index[3] = { |
1150 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW | |
0e39e01c JD |
1151 | }; |
1152 | ||
eb1c8f43 GR |
1153 | static const u8 lm90_temp_max_index[3] = { |
1154 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH | |
742192f5 GR |
1155 | }; |
1156 | ||
eb1c8f43 GR |
1157 | static const u8 lm90_temp_crit_index[3] = { |
1158 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT | |
742192f5 GR |
1159 | }; |
1160 | ||
eb1c8f43 GR |
1161 | static const u8 lm90_temp_emerg_index[3] = { |
1162 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG | |
6948708d GR |
1163 | }; |
1164 | ||
eb1c8f43 | 1165 | static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; |
e9572fdd | 1166 | static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 }; |
eb1c8f43 GR |
1167 | static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; |
1168 | static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; | |
1169 | static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; | |
6948708d | 1170 | |
eb1c8f43 GR |
1171 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1172 | { | |
1173 | struct lm90_data *data = dev_get_drvdata(dev); | |
1174 | int err; | |
06e1c0a2 | 1175 | |
eb1c8f43 GR |
1176 | mutex_lock(&data->update_lock); |
1177 | err = lm90_update_device(dev); | |
1178 | mutex_unlock(&data->update_lock); | |
1179 | if (err) | |
1180 | return err; | |
06e1c0a2 | 1181 | |
eb1c8f43 GR |
1182 | switch (attr) { |
1183 | case hwmon_temp_input: | |
1184 | *val = lm90_get_temp11(data, lm90_temp_index[channel]); | |
1185 | break; | |
1186 | case hwmon_temp_min_alarm: | |
1187 | *val = (data->alarms >> lm90_min_alarm_bits[channel]) & 1; | |
1188 | break; | |
1189 | case hwmon_temp_max_alarm: | |
1190 | *val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1; | |
1191 | break; | |
1192 | case hwmon_temp_crit_alarm: | |
1193 | *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; | |
1194 | break; | |
1195 | case hwmon_temp_emergency_alarm: | |
1196 | *val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1; | |
1197 | break; | |
1198 | case hwmon_temp_fault: | |
1199 | *val = (data->alarms >> lm90_fault_bits[channel]) & 1; | |
1200 | break; | |
1201 | case hwmon_temp_min: | |
1202 | if (channel == 0) | |
1203 | *val = lm90_get_temp8(data, | |
1204 | lm90_temp_min_index[channel]); | |
1205 | else | |
1206 | *val = lm90_get_temp11(data, | |
1207 | lm90_temp_min_index[channel]); | |
1208 | break; | |
1209 | case hwmon_temp_max: | |
1210 | if (channel == 0) | |
1211 | *val = lm90_get_temp8(data, | |
1212 | lm90_temp_max_index[channel]); | |
1213 | else | |
1214 | *val = lm90_get_temp11(data, | |
1215 | lm90_temp_max_index[channel]); | |
1216 | break; | |
1217 | case hwmon_temp_crit: | |
1218 | *val = lm90_get_temp8(data, lm90_temp_crit_index[channel]); | |
1219 | break; | |
1220 | case hwmon_temp_crit_hyst: | |
1221 | *val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]); | |
1222 | break; | |
1223 | case hwmon_temp_emergency: | |
1224 | *val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]); | |
1225 | break; | |
1226 | case hwmon_temp_emergency_hyst: | |
1227 | *val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]); | |
1228 | break; | |
1229 | case hwmon_temp_offset: | |
1230 | *val = lm90_get_temp11(data, REMOTE_OFFSET); | |
1231 | break; | |
1232 | default: | |
1233 | return -EOPNOTSUPP; | |
1234 | } | |
1235 | return 0; | |
1236 | } | |
06e1c0a2 | 1237 | |
eb1c8f43 GR |
1238 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1239 | { | |
1240 | struct lm90_data *data = dev_get_drvdata(dev); | |
1241 | int err; | |
06e1c0a2 | 1242 | |
eb1c8f43 | 1243 | mutex_lock(&data->update_lock); |
06e1c0a2 | 1244 | |
eb1c8f43 GR |
1245 | err = lm90_update_device(dev); |
1246 | if (err) | |
1247 | goto error; | |
1248 | ||
1249 | switch (attr) { | |
1250 | case hwmon_temp_min: | |
1251 | if (channel == 0) | |
1252 | err = lm90_set_temp8(data, | |
1253 | lm90_temp_min_index[channel], | |
1254 | val); | |
1255 | else | |
1256 | err = lm90_set_temp11(data, | |
1257 | lm90_temp_min_index[channel], | |
1258 | val); | |
1259 | break; | |
1260 | case hwmon_temp_max: | |
1261 | if (channel == 0) | |
1262 | err = lm90_set_temp8(data, | |
1263 | lm90_temp_max_index[channel], | |
1264 | val); | |
1265 | else | |
1266 | err = lm90_set_temp11(data, | |
1267 | lm90_temp_max_index[channel], | |
1268 | val); | |
1269 | break; | |
1270 | case hwmon_temp_crit: | |
1271 | err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val); | |
1272 | break; | |
1273 | case hwmon_temp_crit_hyst: | |
1274 | err = lm90_set_temphyst(data, val); | |
1275 | break; | |
1276 | case hwmon_temp_emergency: | |
1277 | err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val); | |
1278 | break; | |
1279 | case hwmon_temp_offset: | |
1280 | err = lm90_set_temp11(data, REMOTE_OFFSET, val); | |
1281 | break; | |
1282 | default: | |
1283 | err = -EOPNOTSUPP; | |
1284 | break; | |
1285 | } | |
1286 | error: | |
1287 | mutex_unlock(&data->update_lock); | |
1288 | ||
1289 | return err; | |
1290 | } | |
1291 | ||
1292 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) | |
c3df5806 | 1293 | { |
eb1c8f43 GR |
1294 | switch (attr) { |
1295 | case hwmon_temp_input: | |
1296 | case hwmon_temp_min_alarm: | |
1297 | case hwmon_temp_max_alarm: | |
1298 | case hwmon_temp_crit_alarm: | |
1299 | case hwmon_temp_emergency_alarm: | |
1300 | case hwmon_temp_emergency_hyst: | |
1301 | case hwmon_temp_fault: | |
3334851d | 1302 | return 0444; |
eb1c8f43 GR |
1303 | case hwmon_temp_min: |
1304 | case hwmon_temp_max: | |
1305 | case hwmon_temp_crit: | |
1306 | case hwmon_temp_emergency: | |
1307 | case hwmon_temp_offset: | |
3334851d | 1308 | return 0644; |
eb1c8f43 GR |
1309 | case hwmon_temp_crit_hyst: |
1310 | if (channel == 0) | |
3334851d GR |
1311 | return 0644; |
1312 | return 0444; | |
eb1c8f43 GR |
1313 | default: |
1314 | return 0; | |
1315 | } | |
c3df5806 JD |
1316 | } |
1317 | ||
eb1c8f43 | 1318 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
c3df5806 | 1319 | { |
eb1c8f43 | 1320 | struct lm90_data *data = dev_get_drvdata(dev); |
11e57812 GR |
1321 | int err; |
1322 | ||
eb1c8f43 GR |
1323 | mutex_lock(&data->update_lock); |
1324 | err = lm90_update_device(dev); | |
1325 | mutex_unlock(&data->update_lock); | |
1326 | if (err) | |
11e57812 | 1327 | return err; |
c3df5806 | 1328 | |
eb1c8f43 GR |
1329 | switch (attr) { |
1330 | case hwmon_chip_update_interval: | |
1331 | *val = data->update_interval; | |
c3df5806 | 1332 | break; |
eb1c8f43 GR |
1333 | case hwmon_chip_alarms: |
1334 | *val = data->alarms; | |
c3df5806 JD |
1335 | break; |
1336 | default: | |
eb1c8f43 | 1337 | return -EOPNOTSUPP; |
c3df5806 JD |
1338 | } |
1339 | ||
eb1c8f43 | 1340 | return 0; |
c3df5806 JD |
1341 | } |
1342 | ||
eb1c8f43 GR |
1343 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1344 | { | |
1345 | struct lm90_data *data = dev_get_drvdata(dev); | |
1346 | struct i2c_client *client = data->client; | |
1347 | int err; | |
c3df5806 | 1348 | |
eb1c8f43 GR |
1349 | mutex_lock(&data->update_lock); |
1350 | ||
1351 | err = lm90_update_device(dev); | |
1352 | if (err) | |
1353 | goto error; | |
1354 | ||
1355 | switch (attr) { | |
1356 | case hwmon_chip_update_interval: | |
1357 | err = lm90_set_convrate(client, data, | |
1358 | clamp_val(val, 0, 100000)); | |
1359 | break; | |
1360 | default: | |
1361 | err = -EOPNOTSUPP; | |
1362 | break; | |
1363 | } | |
1364 | error: | |
1365 | mutex_unlock(&data->update_lock); | |
1366 | ||
1367 | return err; | |
1368 | } | |
1369 | ||
1370 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) | |
1371 | { | |
1372 | switch (attr) { | |
1373 | case hwmon_chip_update_interval: | |
3334851d | 1374 | return 0644; |
eb1c8f43 | 1375 | case hwmon_chip_alarms: |
3334851d | 1376 | return 0444; |
eb1c8f43 GR |
1377 | default: |
1378 | return 0; | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, | |
1383 | u32 attr, int channel, long *val) | |
1384 | { | |
1385 | switch (type) { | |
1386 | case hwmon_chip: | |
1387 | return lm90_chip_read(dev, attr, channel, val); | |
1388 | case hwmon_temp: | |
1389 | return lm90_temp_read(dev, attr, channel, val); | |
1390 | default: | |
1391 | return -EOPNOTSUPP; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, | |
1396 | u32 attr, int channel, long val) | |
1397 | { | |
1398 | switch (type) { | |
1399 | case hwmon_chip: | |
1400 | return lm90_chip_write(dev, attr, channel, val); | |
1401 | case hwmon_temp: | |
1402 | return lm90_temp_write(dev, attr, channel, val); | |
1403 | default: | |
1404 | return -EOPNOTSUPP; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, | |
1409 | u32 attr, int channel) | |
1410 | { | |
1411 | switch (type) { | |
1412 | case hwmon_chip: | |
1413 | return lm90_chip_is_visible(data, attr, channel); | |
1414 | case hwmon_temp: | |
1415 | return lm90_temp_is_visible(data, attr, channel); | |
1416 | default: | |
1417 | return 0; | |
1418 | } | |
1419 | } | |
1da177e4 | 1420 | |
15b66ab6 | 1421 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1422 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1423 | struct i2c_board_info *info) |
8256fe0f | 1424 | { |
b2589ab0 JD |
1425 | struct i2c_adapter *adapter = client->adapter; |
1426 | int address = client->addr; | |
15b66ab6 | 1427 | const char *name = NULL; |
b2589ab0 | 1428 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1429 | |
15b66ab6 GR |
1430 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1431 | return -ENODEV; | |
1da177e4 | 1432 | |
8f2fa77c | 1433 | /* detection and identification */ |
b2589ab0 JD |
1434 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1435 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1436 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1437 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1438 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1439 | return -ENODEV; |
1440 | ||
f90be42f | 1441 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1442 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1443 | if (config2 < 0) | |
9b0e8526 | 1444 | return -ENODEV; |
f90be42f | 1445 | } else |
b2589ab0 | 1446 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1447 | |
f90be42f JD |
1448 | if ((address == 0x4C || address == 0x4D) |
1449 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1450 | if ((config1 & 0x2A) == 0x00 |
1451 | && (config2 & 0xF8) == 0x00 | |
1452 | && convrate <= 0x09) { | |
8f2fa77c JD |
1453 | if (address == 0x4C |
1454 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1455 | name = "lm90"; | |
32c82a93 | 1456 | } else |
8f2fa77c JD |
1457 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1458 | name = "lm99"; | |
1459 | dev_info(&adapter->dev, | |
1460 | "Assuming LM99 chip at 0x%02x\n", | |
1461 | address); | |
1462 | dev_info(&adapter->dev, | |
1463 | "If it is an LM89, instantiate it " | |
1464 | "with the new_device sysfs " | |
1465 | "interface\n"); | |
271dabf5 | 1466 | } else |
8f2fa77c JD |
1467 | if (address == 0x4C |
1468 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1469 | name = "lm86"; | |
1da177e4 LT |
1470 | } |
1471 | } | |
8f2fa77c JD |
1472 | } else |
1473 | if ((address == 0x4C || address == 0x4D) | |
1474 | && man_id == 0x41) { /* Analog Devices */ | |
1475 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1476 | && (config1 & 0x3F) == 0x00 |
1477 | && convrate <= 0x0A) { | |
8f2fa77c | 1478 | name = "adm1032"; |
f36ffeab GR |
1479 | /* |
1480 | * The ADM1032 supports PEC, but only if combined | |
1481 | * transactions are not used. | |
1482 | */ | |
8f2fa77c JD |
1483 | if (i2c_check_functionality(adapter, |
1484 | I2C_FUNC_SMBUS_BYTE)) | |
1485 | info->flags |= I2C_CLIENT_PEC; | |
1486 | } else | |
1487 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1488 | && (config1 & 0x1B) == 0x00 |
1489 | && convrate <= 0x0A) { | |
8f2fa77c | 1490 | name = "adt7461"; |
5a4e5e6a GR |
1491 | } else |
1492 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1493 | && (config1 & 0x1B) == 0x00 |
1494 | && convrate <= 0x0A) { | |
5a4e5e6a | 1495 | name = "adt7461a"; |
8f2fa77c JD |
1496 | } |
1497 | } else | |
1498 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1499 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1500 | |
1501 | /* | |
1502 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1503 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1504 | * exists, both readings will reflect the same value. Otherwise, | |
1505 | * the readings will be different. | |
1506 | */ | |
b2589ab0 JD |
1507 | emerg = i2c_smbus_read_byte_data(client, |
1508 | MAX6659_REG_R_REMOTE_EMERG); | |
1509 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1510 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1511 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1512 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1513 | status2 = i2c_smbus_read_byte_data(client, |
1514 | MAX6696_REG_R_STATUS2); | |
1515 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1516 | return -ENODEV; |
1517 | ||
8f2fa77c JD |
1518 | /* |
1519 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1520 | * register. Reading from that address will return the last | |
1521 | * read value, which in our case is those of the man_id | |
1522 | * register. Likewise, the config1 register seems to lack a | |
1523 | * low nibble, so the value will be those of the previous | |
1524 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1525 | * MAX6659 has a third set of upper temperature limit registers. |
1526 | * Those registers also return values on MAX6657 and MAX6658, | |
1527 | * thus the only way to detect MAX6659 is by its address. | |
1528 | * For this reason it will be mis-detected as MAX6657 if its | |
1529 | * address is 0x4C. | |
8f2fa77c JD |
1530 | */ |
1531 | if (chip_id == man_id | |
13c84951 | 1532 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1533 | && (config1 & 0x1F) == (man_id & 0x0F) |
1534 | && convrate <= 0x09) { | |
13c84951 GR |
1535 | if (address == 0x4C) |
1536 | name = "max6657"; | |
1537 | else | |
1538 | name = "max6659"; | |
8f2fa77c | 1539 | } else |
06e1c0a2 GR |
1540 | /* |
1541 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1542 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1543 | * register is unused and should return zero when read. Bit 0 of | |
1544 | * the status2 register is unused and should return zero when | |
1545 | * read. | |
1546 | * | |
1547 | * MAX6695 and MAX6696 have an additional set of temperature | |
1548 | * limit registers. We can detect those chips by checking if | |
1549 | * one of those registers exists. | |
1550 | */ | |
1551 | if (chip_id == 0x01 | |
b2589ab0 JD |
1552 | && (config1 & 0x10) == 0x00 |
1553 | && (status2 & 0x01) == 0x00 | |
1554 | && emerg == emerg2 | |
1555 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1556 | name = "max6696"; |
1557 | } else | |
8f2fa77c JD |
1558 | /* |
1559 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1560 | * revision of the chip. The lowest bit of the config1 register | |
1561 | * is unused and should return zero when read, so should the | |
1562 | * second to last bit of config1 (software reset). | |
1563 | */ | |
1564 | if (chip_id == 0x01 | |
b2589ab0 JD |
1565 | && (config1 & 0x03) == 0x00 |
1566 | && convrate <= 0x07) { | |
8f2fa77c JD |
1567 | name = "max6680"; |
1568 | } else | |
1569 | /* | |
1570 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1571 | * revision of the chip. The lowest 6 bits of the config1 | |
1572 | * register are unused and should return zero when read. | |
1573 | */ | |
1574 | if (chip_id == 0x59 | |
b2589ab0 JD |
1575 | && (config1 & 0x3f) == 0x00 |
1576 | && convrate <= 0x07) { | |
8f2fa77c | 1577 | name = "max6646"; |
229d495d JL |
1578 | } else |
1579 | /* | |
1580 | * The chip_id of the MAX6654 holds the revision of the chip. | |
1581 | * The lowest 3 bits of the config1 register are unused and | |
1582 | * should return zero when read. | |
1583 | */ | |
1584 | if (chip_id == 0x08 | |
1585 | && (config1 & 0x07) == 0x00 | |
1586 | && convrate <= 0x07) { | |
1587 | name = "max6654"; | |
1da177e4 | 1588 | } |
6771ea1f JD |
1589 | } else |
1590 | if (address == 0x4C | |
1591 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1592 | if ((config1 & 0x2A) == 0x00 |
1593 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1594 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1595 | && convrate <= 0x09) { |
c4f99a2b JD |
1596 | name = "w83l771"; |
1597 | } else | |
1598 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1599 | && convrate <= 0x08) { |
c4f99a2b JD |
1600 | name = "w83l771"; |
1601 | } | |
6771ea1f | 1602 | } |
2ef01793 | 1603 | } else |
6d101c58 JD |
1604 | if (address >= 0x48 && address <= 0x4F |
1605 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1606 | if (chip_id == 0x00 |
b2589ab0 JD |
1607 | && (config1 & 0x2A) == 0x00 |
1608 | && (config2 & 0xFE) == 0x00 | |
1609 | && convrate <= 0x09) { | |
2ef01793 SD |
1610 | name = "sa56004"; |
1611 | } | |
ae544f64 GR |
1612 | } else |
1613 | if ((address == 0x4C || address == 0x4D) | |
1614 | && man_id == 0x47) { /* GMT */ | |
1615 | if (chip_id == 0x01 /* G781 */ | |
1616 | && (config1 & 0x3F) == 0x00 | |
1617 | && convrate <= 0x08) | |
1618 | name = "g781"; | |
1daaceb2 WN |
1619 | } else |
1620 | if (address == 0x4C | |
1621 | && man_id == 0x55) { /* Texas Instruments */ | |
1622 | int local_ext; | |
1623 | ||
1624 | local_ext = i2c_smbus_read_byte_data(client, | |
1625 | TMP451_REG_R_LOCAL_TEMPL); | |
1626 | ||
1627 | if (chip_id == 0x00 /* TMP451 */ | |
1628 | && (config1 & 0x1B) == 0x00 | |
1629 | && convrate <= 0x09 | |
1630 | && (local_ext & 0x0F) == 0x00) | |
1631 | name = "tmp451"; | |
1da177e4 LT |
1632 | } |
1633 | ||
8f2fa77c JD |
1634 | if (!name) { /* identification failed */ |
1635 | dev_dbg(&adapter->dev, | |
1636 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1637 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1638 | return -ENODEV; | |
1da177e4 | 1639 | } |
8f2fa77c | 1640 | |
9b0e8526 JD |
1641 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
1f17a444 | 1646 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1647 | { |
1f17a444 GR |
1648 | struct lm90_data *data = _data; |
1649 | struct i2c_client *client = data->client; | |
1650 | ||
f7001bb0 | 1651 | /* Restore initial configuration */ |
7a1d220c | 1652 | lm90_write_convrate(data, data->convrate_orig); |
f7001bb0 GR |
1653 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, |
1654 | data->config_orig); | |
1655 | } | |
1656 | ||
37ad04d7 | 1657 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1658 | { |
37ad04d7 | 1659 | int config, convrate; |
15b66ab6 | 1660 | |
37ad04d7 GR |
1661 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1662 | if (convrate < 0) | |
1663 | return convrate; | |
0c01b644 GR |
1664 | data->convrate_orig = convrate; |
1665 | ||
15b66ab6 GR |
1666 | /* |
1667 | * Start the conversions. | |
1668 | */ | |
37ad04d7 GR |
1669 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1670 | if (config < 0) | |
1671 | return config; | |
15b66ab6 | 1672 | data->config_orig = config; |
b849e5d1 | 1673 | data->config = config; |
15b66ab6 | 1674 | |
62456189 BY |
1675 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
1676 | ||
15b66ab6 | 1677 | /* Check Temperature Range Select */ |
1daaceb2 | 1678 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1679 | if (config & 0x04) |
1680 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1685 | * 0.125 degree resolution) and range (0x08, extend range | |
1686 | * to -64 degree) mode for the remote temperature sensor. | |
1687 | */ | |
1688 | if (data->kind == max6680) | |
1689 | config |= 0x18; | |
1690 | ||
229d495d JL |
1691 | /* |
1692 | * Put MAX6654 into extended range (0x20, extend minimum range from | |
1693 | * 0 degrees to -64 degrees). Note that extended resolution is not | |
1694 | * possible on the MAX6654 unless conversion rate is set to 1 Hz or | |
1695 | * slower, which is intentionally not done by default. | |
1696 | */ | |
1697 | if (data->kind == max6654) | |
1698 | config |= 0x20; | |
1699 | ||
15b66ab6 GR |
1700 | /* |
1701 | * Select external channel 0 for max6695/96 | |
1702 | */ | |
1703 | if (data->kind == max6696) | |
1704 | config &= ~0x08; | |
1705 | ||
1706 | config &= 0xBF; /* run */ | |
7a1d220c | 1707 | lm90_update_confreg(data, config); |
1f17a444 | 1708 | |
c5fcf01b | 1709 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
15b66ab6 GR |
1710 | } |
1711 | ||
072de496 WN |
1712 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1713 | { | |
1714 | struct lm90_data *data = i2c_get_clientdata(client); | |
37ad04d7 | 1715 | int st, st2 = 0; |
072de496 | 1716 | |
37ad04d7 GR |
1717 | st = lm90_read_reg(client, LM90_REG_R_STATUS); |
1718 | if (st < 0) | |
1719 | return false; | |
072de496 | 1720 | |
37ad04d7 GR |
1721 | if (data->kind == max6696) { |
1722 | st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
1723 | if (st2 < 0) | |
1724 | return false; | |
1725 | } | |
072de496 WN |
1726 | |
1727 | *status = st | (st2 << 8); | |
1728 | ||
1729 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1730 | return false; | |
1731 | ||
1732 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1733 | (st2 & MAX6696_STATUS2_LOT2)) | |
1734 | dev_warn(&client->dev, | |
1735 | "temp%d out of range, please check!\n", 1); | |
1736 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1737 | (st2 & MAX6696_STATUS2_ROT2)) | |
1738 | dev_warn(&client->dev, | |
1739 | "temp%d out of range, please check!\n", 2); | |
1740 | if (st & LM90_STATUS_ROPEN) | |
1741 | dev_warn(&client->dev, | |
1742 | "temp%d diode open, please check!\n", 2); | |
1743 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1744 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1745 | dev_warn(&client->dev, | |
1746 | "temp%d out of range, please check!\n", 3); | |
1747 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1748 | dev_warn(&client->dev, | |
1749 | "temp%d diode open, please check!\n", 3); | |
1750 | ||
1751 | return true; | |
1752 | } | |
1753 | ||
109b1283 WN |
1754 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1755 | { | |
1756 | struct i2c_client *client = dev_id; | |
1757 | u16 status; | |
1758 | ||
1759 | if (lm90_is_tripped(client, &status)) | |
1760 | return IRQ_HANDLED; | |
1761 | else | |
1762 | return IRQ_NONE; | |
1763 | } | |
1764 | ||
1f17a444 GR |
1765 | static void lm90_remove_pec(void *dev) |
1766 | { | |
1767 | device_remove_file(dev, &dev_attr_pec); | |
1768 | } | |
1769 | ||
1770 | static void lm90_regulator_disable(void *regulator) | |
1771 | { | |
1772 | regulator_disable(regulator); | |
1773 | } | |
1774 | ||
eb1c8f43 GR |
1775 | |
1776 | static const struct hwmon_ops lm90_ops = { | |
1777 | .is_visible = lm90_is_visible, | |
1778 | .read = lm90_read, | |
1779 | .write = lm90_write, | |
1780 | }; | |
1781 | ||
b2589ab0 | 1782 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1783 | const struct i2c_device_id *id) |
1784 | { | |
b2589ab0 | 1785 | struct device *dev = &client->dev; |
e67776cc | 1786 | struct i2c_adapter *adapter = client->adapter; |
eb1c8f43 | 1787 | struct hwmon_channel_info *info; |
3e0f964f | 1788 | struct regulator *regulator; |
6e5f62b9 | 1789 | struct device *hwmon_dev; |
eb1c8f43 | 1790 | struct lm90_data *data; |
9b0e8526 | 1791 | int err; |
1da177e4 | 1792 | |
3e0f964f WN |
1793 | regulator = devm_regulator_get(dev, "vcc"); |
1794 | if (IS_ERR(regulator)) | |
1795 | return PTR_ERR(regulator); | |
1796 | ||
1797 | err = regulator_enable(regulator); | |
1798 | if (err < 0) { | |
d89fa686 | 1799 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1800 | return err; |
1801 | } | |
1802 | ||
c5fcf01b GR |
1803 | err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator); |
1804 | if (err) | |
1805 | return err; | |
1f17a444 | 1806 | |
d89fa686 | 1807 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1808 | if (!data) |
1809 | return -ENOMEM; | |
1810 | ||
1de8b250 | 1811 | data->client = client; |
b2589ab0 | 1812 | i2c_set_clientdata(client, data); |
9a61bf63 | 1813 | mutex_init(&data->update_lock); |
1da177e4 | 1814 | |
9b0e8526 | 1815 | /* Set the device type */ |
df8d57bf JMC |
1816 | if (client->dev.of_node) |
1817 | data->kind = (enum chips)of_device_get_match_data(&client->dev); | |
1818 | else | |
1819 | data->kind = id->driver_data; | |
9b0e8526 JD |
1820 | if (data->kind == adm1032) { |
1821 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1822 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1823 | } |
1da177e4 | 1824 | |
f36ffeab GR |
1825 | /* |
1826 | * Different devices have different alarm bits triggering the | |
1827 | * ALERT# output | |
1828 | */ | |
4667bcb8 | 1829 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1830 | |
88073bb1 | 1831 | /* Set chip capabilities */ |
4667bcb8 | 1832 | data->flags = lm90_params[data->kind].flags; |
eb1c8f43 GR |
1833 | |
1834 | data->chip.ops = &lm90_ops; | |
1835 | data->chip.info = data->info; | |
1836 | ||
a4d41e67 GR |
1837 | data->info[0] = HWMON_CHANNEL_INFO(chip, |
1838 | HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS); | |
eb1c8f43 GR |
1839 | data->info[1] = &data->temp_info; |
1840 | ||
1841 | info = &data->temp_info; | |
1842 | info->type = hwmon_temp; | |
1843 | info->config = data->channel_config; | |
1844 | ||
1845 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1846 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1847 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM; | |
1848 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1849 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1850 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; | |
1851 | ||
1852 | if (data->flags & LM90_HAVE_OFFSET) | |
1853 | data->channel_config[1] |= HWMON_T_OFFSET; | |
1854 | ||
1855 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
1856 | data->channel_config[0] |= HWMON_T_EMERGENCY | | |
1857 | HWMON_T_EMERGENCY_HYST; | |
1858 | data->channel_config[1] |= HWMON_T_EMERGENCY | | |
1859 | HWMON_T_EMERGENCY_HYST; | |
1860 | } | |
1861 | ||
1862 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { | |
1863 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; | |
1864 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; | |
1865 | } | |
1866 | ||
1867 | if (data->flags & LM90_HAVE_TEMP3) { | |
1868 | data->channel_config[2] = HWMON_T_INPUT | | |
1869 | HWMON_T_MIN | HWMON_T_MAX | | |
1870 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | | |
1871 | HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST | | |
1872 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | | |
1873 | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM | | |
1874 | HWMON_T_FAULT; | |
1875 | } | |
1876 | ||
a095f687 | 1877 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1878 | |
0c01b644 GR |
1879 | /* Set maximum conversion rate */ |
1880 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1881 | ||
1da177e4 | 1882 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
1883 | err = lm90_init_client(client, data); |
1884 | if (err < 0) { | |
1885 | dev_err(dev, "Failed to initialize device\n"); | |
1886 | return err; | |
1887 | } | |
1da177e4 | 1888 | |
eb1c8f43 GR |
1889 | /* |
1890 | * The 'pec' attribute is attached to the i2c device and thus created | |
1891 | * separately. | |
1892 | */ | |
b2589ab0 JD |
1893 | if (client->flags & I2C_CLIENT_PEC) { |
1894 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1895 | if (err) |
1f17a444 | 1896 | return err; |
c5fcf01b GR |
1897 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
1898 | if (err) | |
1899 | return err; | |
06e1c0a2 | 1900 | } |
0e39e01c | 1901 | |
eb1c8f43 GR |
1902 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
1903 | data, &data->chip, | |
1904 | NULL); | |
6e5f62b9 GR |
1905 | if (IS_ERR(hwmon_dev)) |
1906 | return PTR_ERR(hwmon_dev); | |
943b0830 | 1907 | |
109b1283 WN |
1908 | if (client->irq) { |
1909 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1910 | err = devm_request_threaded_irq(dev, client->irq, | |
1911 | NULL, lm90_irq_thread, | |
1912 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1913 | "lm90", client); | |
1914 | if (err < 0) { | |
1915 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 1916 | return err; |
109b1283 WN |
1917 | } |
1918 | } | |
1919 | ||
1da177e4 LT |
1920 | return 0; |
1921 | } | |
1922 | ||
b4f21054 BT |
1923 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
1924 | unsigned int flag) | |
53de3342 | 1925 | { |
072de496 | 1926 | u16 alarms; |
06e1c0a2 | 1927 | |
b4f21054 BT |
1928 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
1929 | return; | |
1930 | ||
072de496 | 1931 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1932 | /* |
1933 | * Disable ALERT# output, because these chips don't implement | |
1934 | * SMBus alert correctly; they should only hold the alert line | |
1935 | * low briefly. | |
1936 | */ | |
072de496 WN |
1937 | struct lm90_data *data = i2c_get_clientdata(client); |
1938 | ||
37ad04d7 GR |
1939 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
1940 | (alarms & data->alert_alarms)) { | |
53de3342 | 1941 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
7a1d220c | 1942 | lm90_update_confreg(data, data->config | 0x80); |
53de3342 | 1943 | } |
072de496 WN |
1944 | } else { |
1945 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1946 | } |
1947 | } | |
1948 | ||
15b66ab6 GR |
1949 | static struct i2c_driver lm90_driver = { |
1950 | .class = I2C_CLASS_HWMON, | |
1951 | .driver = { | |
1952 | .name = "lm90", | |
df8d57bf | 1953 | .of_match_table = of_match_ptr(lm90_of_match), |
15b66ab6 GR |
1954 | }, |
1955 | .probe = lm90_probe, | |
15b66ab6 GR |
1956 | .alert = lm90_alert, |
1957 | .id_table = lm90_id, | |
1958 | .detect = lm90_detect, | |
1959 | .address_list = normal_i2c, | |
1960 | }; | |
1da177e4 | 1961 | |
f0967eea | 1962 | module_i2c_driver(lm90_driver); |
1da177e4 | 1963 | |
7c81c60f | 1964 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1965 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1966 | MODULE_LICENSE("GPL"); |