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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 | * |
1a51e068 DW |
38 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
39 | * MAX6692 chips made by Maxim. These are again similar to the LM86, | |
40 | * but they use unsigned temperature values and can report temperatures | |
41 | * from 0 to 145 degrees. | |
271dabf5 | 42 | * |
32c82a93 RB |
43 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
44 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
45 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
46 | * be treated identically. | |
32c82a93 | 47 | * |
06e1c0a2 GR |
48 | * This driver also supports the MAX6695 and MAX6696, two other sensor |
49 | * chips made by Maxim. These are also quite similar to other Maxim | |
50 | * chips, but support three temperature sensors instead of two. MAX6695 | |
51 | * and MAX6696 only differ in the pinout so they can be treated identically. | |
52 | * | |
5a4e5e6a GR |
53 | * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as |
54 | * NCT1008 from ON Semiconductor. The chips are supported in both compatibility | |
55 | * and extended mode. They are mostly compatible with LM90 except for a data | |
56 | * format difference for the temperature value registers. | |
1da177e4 | 57 | * |
2ef01793 SD |
58 | * This driver also supports the SA56004 from Philips. This device is |
59 | * pin-compatible with the LM86, the ED/EDP parts are also address-compatible. | |
60 | * | |
ae544f64 GR |
61 | * This driver also supports the G781 from GMT. This device is compatible |
62 | * with the ADM1032. | |
63 | * | |
1daaceb2 WN |
64 | * This driver also supports TMP451 from Texas Instruments. This device is |
65 | * supported in both compatibility and extended mode. It's mostly compatible | |
66 | * with ADT7461 except for local temperature low byte register and max | |
67 | * conversion rate. | |
68 | * | |
1da177e4 LT |
69 | * Since the LM90 was the first chipset supported by this driver, most |
70 | * comments will refer to this chipset, but are actually general and | |
71 | * concern all supported chipsets, unless mentioned otherwise. | |
1da177e4 LT |
72 | */ |
73 | ||
1da177e4 LT |
74 | #include <linux/module.h> |
75 | #include <linux/init.h> | |
76 | #include <linux/slab.h> | |
77 | #include <linux/jiffies.h> | |
78 | #include <linux/i2c.h> | |
943b0830 MH |
79 | #include <linux/hwmon.h> |
80 | #include <linux/err.h> | |
9a61bf63 | 81 | #include <linux/mutex.h> |
df8d57bf | 82 | #include <linux/of_device.h> |
0e39e01c | 83 | #include <linux/sysfs.h> |
109b1283 | 84 | #include <linux/interrupt.h> |
3e0f964f | 85 | #include <linux/regulator/consumer.h> |
1da177e4 LT |
86 | |
87 | /* | |
88 | * Addresses to scan | |
89 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 90 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
91 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
92 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
93 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
94 | * have address 0x4d. | |
271dabf5 | 95 | * MAX6647 has address 0x4e. |
13c84951 | 96 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
32c82a93 RB |
97 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
98 | * 0x4c, 0x4d or 0x4e. | |
2ef01793 | 99 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
100 | */ |
101 | ||
25e9c86d | 102 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
103 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
104 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 105 | |
13c84951 | 106 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
1daaceb2 | 107 | max6646, w83l771, max6696, sa56004, g781, tmp451 }; |
1da177e4 LT |
108 | |
109 | /* | |
110 | * The LM90 registers | |
111 | */ | |
112 | ||
113 | #define LM90_REG_R_MAN_ID 0xFE | |
114 | #define LM90_REG_R_CHIP_ID 0xFF | |
115 | #define LM90_REG_R_CONFIG1 0x03 | |
116 | #define LM90_REG_W_CONFIG1 0x09 | |
117 | #define LM90_REG_R_CONFIG2 0xBF | |
118 | #define LM90_REG_W_CONFIG2 0xBF | |
119 | #define LM90_REG_R_CONVRATE 0x04 | |
120 | #define LM90_REG_W_CONVRATE 0x0A | |
121 | #define LM90_REG_R_STATUS 0x02 | |
122 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
123 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
124 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
125 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
126 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
127 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
128 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
129 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
130 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
131 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
132 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
133 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
134 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
135 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
136 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
137 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
138 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
139 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
140 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
141 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
142 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
143 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
144 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
145 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
146 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
147 | ||
06e1c0a2 | 148 | /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
149 | |
150 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 151 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
152 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
153 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
154 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
155 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 156 | |
2ef01793 SD |
157 | /* SA56004 registers */ |
158 | ||
159 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
160 | ||
0c01b644 GR |
161 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
162 | ||
1daaceb2 WN |
163 | /* TMP451 registers */ |
164 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 | |
165 | ||
23b2d477 NC |
166 | /* |
167 | * Device flags | |
168 | */ | |
88073bb1 GR |
169 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
170 | /* Device features */ | |
171 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 172 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 173 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
174 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
175 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 176 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
23b2d477 | 177 | |
072de496 WN |
178 | /* LM90 status */ |
179 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
180 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
181 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
182 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
183 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
184 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
185 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
186 | ||
187 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
188 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
189 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
190 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
191 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
192 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
193 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
194 | ||
1da177e4 LT |
195 | /* |
196 | * Driver data (common to all clients) | |
197 | */ | |
198 | ||
9b0e8526 JD |
199 | static const struct i2c_device_id lm90_id[] = { |
200 | { "adm1032", adm1032 }, | |
201 | { "adt7461", adt7461 }, | |
5a4e5e6a | 202 | { "adt7461a", adt7461 }, |
ae544f64 | 203 | { "g781", g781 }, |
9b0e8526 JD |
204 | { "lm90", lm90 }, |
205 | { "lm86", lm86 }, | |
97ae60bb JD |
206 | { "lm89", lm86 }, |
207 | { "lm99", lm99 }, | |
271dabf5 BH |
208 | { "max6646", max6646 }, |
209 | { "max6647", max6646 }, | |
210 | { "max6649", max6646 }, | |
9b0e8526 JD |
211 | { "max6657", max6657 }, |
212 | { "max6658", max6657 }, | |
13c84951 | 213 | { "max6659", max6659 }, |
9b0e8526 JD |
214 | { "max6680", max6680 }, |
215 | { "max6681", max6680 }, | |
06e1c0a2 GR |
216 | { "max6695", max6696 }, |
217 | { "max6696", max6696 }, | |
5a4e5e6a | 218 | { "nct1008", adt7461 }, |
6771ea1f | 219 | { "w83l771", w83l771 }, |
2ef01793 | 220 | { "sa56004", sa56004 }, |
1daaceb2 | 221 | { "tmp451", tmp451 }, |
9b0e8526 JD |
222 | { } |
223 | }; | |
224 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
225 | ||
787afaa3 | 226 | static const struct of_device_id __maybe_unused lm90_of_match[] = { |
df8d57bf JMC |
227 | { |
228 | .compatible = "adi,adm1032", | |
229 | .data = (void *)adm1032 | |
230 | }, | |
231 | { | |
232 | .compatible = "adi,adt7461", | |
233 | .data = (void *)adt7461 | |
234 | }, | |
235 | { | |
236 | .compatible = "adi,adt7461a", | |
237 | .data = (void *)adt7461 | |
238 | }, | |
239 | { | |
240 | .compatible = "gmt,g781", | |
241 | .data = (void *)g781 | |
242 | }, | |
243 | { | |
244 | .compatible = "national,lm90", | |
245 | .data = (void *)lm90 | |
246 | }, | |
247 | { | |
248 | .compatible = "national,lm86", | |
249 | .data = (void *)lm86 | |
250 | }, | |
251 | { | |
252 | .compatible = "national,lm89", | |
253 | .data = (void *)lm86 | |
254 | }, | |
255 | { | |
256 | .compatible = "national,lm99", | |
257 | .data = (void *)lm99 | |
258 | }, | |
259 | { | |
260 | .compatible = "dallas,max6646", | |
261 | .data = (void *)max6646 | |
262 | }, | |
263 | { | |
264 | .compatible = "dallas,max6647", | |
265 | .data = (void *)max6646 | |
266 | }, | |
267 | { | |
268 | .compatible = "dallas,max6649", | |
269 | .data = (void *)max6646 | |
270 | }, | |
271 | { | |
272 | .compatible = "dallas,max6657", | |
273 | .data = (void *)max6657 | |
274 | }, | |
275 | { | |
276 | .compatible = "dallas,max6658", | |
277 | .data = (void *)max6657 | |
278 | }, | |
279 | { | |
280 | .compatible = "dallas,max6659", | |
281 | .data = (void *)max6659 | |
282 | }, | |
283 | { | |
284 | .compatible = "dallas,max6680", | |
285 | .data = (void *)max6680 | |
286 | }, | |
287 | { | |
288 | .compatible = "dallas,max6681", | |
289 | .data = (void *)max6680 | |
290 | }, | |
291 | { | |
292 | .compatible = "dallas,max6695", | |
293 | .data = (void *)max6696 | |
294 | }, | |
295 | { | |
296 | .compatible = "dallas,max6696", | |
297 | .data = (void *)max6696 | |
298 | }, | |
299 | { | |
300 | .compatible = "onnn,nct1008", | |
301 | .data = (void *)adt7461 | |
302 | }, | |
303 | { | |
304 | .compatible = "winbond,w83l771", | |
305 | .data = (void *)w83l771 | |
306 | }, | |
307 | { | |
308 | .compatible = "nxp,sa56004", | |
309 | .data = (void *)sa56004 | |
310 | }, | |
311 | { | |
312 | .compatible = "ti,tmp451", | |
313 | .data = (void *)tmp451 | |
314 | }, | |
315 | { }, | |
316 | }; | |
317 | MODULE_DEVICE_TABLE(of, lm90_of_match); | |
318 | ||
4667bcb8 GR |
319 | /* |
320 | * chip type specific parameters | |
321 | */ | |
322 | struct lm90_params { | |
323 | u32 flags; /* Capabilities */ | |
324 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
325 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 326 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 327 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
328 | }; |
329 | ||
330 | static const struct lm90_params lm90_params[] = { | |
331 | [adm1032] = { | |
1179324c GR |
332 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
333 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 334 | .alert_alarms = 0x7c, |
0c01b644 | 335 | .max_convrate = 10, |
4667bcb8 GR |
336 | }, |
337 | [adt7461] = { | |
1179324c GR |
338 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
339 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 340 | .alert_alarms = 0x7c, |
0c01b644 | 341 | .max_convrate = 10, |
4667bcb8 | 342 | }, |
ae544f64 GR |
343 | [g781] = { |
344 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
345 | | LM90_HAVE_BROKEN_ALERT, | |
346 | .alert_alarms = 0x7c, | |
347 | .max_convrate = 8, | |
348 | }, | |
4667bcb8 GR |
349 | [lm86] = { |
350 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
351 | .alert_alarms = 0x7b, | |
0c01b644 | 352 | .max_convrate = 9, |
4667bcb8 GR |
353 | }, |
354 | [lm90] = { | |
355 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
356 | .alert_alarms = 0x7b, | |
0c01b644 | 357 | .max_convrate = 9, |
4667bcb8 GR |
358 | }, |
359 | [lm99] = { | |
360 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
361 | .alert_alarms = 0x7b, | |
0c01b644 | 362 | .max_convrate = 9, |
4667bcb8 GR |
363 | }, |
364 | [max6646] = { | |
4667bcb8 | 365 | .alert_alarms = 0x7c, |
0c01b644 | 366 | .max_convrate = 6, |
2ef01793 | 367 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
368 | }, |
369 | [max6657] = { | |
4667bcb8 | 370 | .alert_alarms = 0x7c, |
0c01b644 | 371 | .max_convrate = 8, |
2ef01793 | 372 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
373 | }, |
374 | [max6659] = { | |
a095f687 | 375 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 376 | .alert_alarms = 0x7c, |
0c01b644 | 377 | .max_convrate = 8, |
2ef01793 | 378 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
379 | }, |
380 | [max6680] = { | |
381 | .flags = LM90_HAVE_OFFSET, | |
382 | .alert_alarms = 0x7c, | |
0c01b644 | 383 | .max_convrate = 7, |
4667bcb8 GR |
384 | }, |
385 | [max6696] = { | |
a095f687 | 386 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 387 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 388 | .alert_alarms = 0x1c7c, |
0c01b644 | 389 | .max_convrate = 6, |
2ef01793 | 390 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
391 | }, |
392 | [w83l771] = { | |
393 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
394 | .alert_alarms = 0x7c, | |
0c01b644 | 395 | .max_convrate = 8, |
4667bcb8 | 396 | }, |
2ef01793 | 397 | [sa56004] = { |
a095f687 | 398 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
399 | .alert_alarms = 0x7b, |
400 | .max_convrate = 9, | |
401 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
402 | }, | |
1daaceb2 WN |
403 | [tmp451] = { |
404 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
405 | | LM90_HAVE_BROKEN_ALERT, | |
406 | .alert_alarms = 0x7c, | |
407 | .max_convrate = 9, | |
408 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
eb1c8f43 | 409 | }, |
4667bcb8 GR |
410 | }; |
411 | ||
40465d94 WN |
412 | /* |
413 | * TEMP8 register index | |
414 | */ | |
415 | enum lm90_temp8_reg_index { | |
416 | LOCAL_LOW = 0, | |
417 | LOCAL_HIGH, | |
418 | LOCAL_CRIT, | |
419 | REMOTE_CRIT, | |
420 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
421 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
422 | REMOTE2_CRIT, /* max6695/96 only */ | |
423 | REMOTE2_EMERG, /* max6695/96 only */ | |
424 | TEMP8_REG_NUM | |
425 | }; | |
426 | ||
427 | /* | |
428 | * TEMP11 register index | |
429 | */ | |
430 | enum lm90_temp11_reg_index { | |
431 | REMOTE_TEMP = 0, | |
432 | REMOTE_LOW, | |
433 | REMOTE_HIGH, | |
434 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
435 | LOCAL_TEMP, | |
436 | REMOTE2_TEMP, /* max6695/96 only */ | |
437 | REMOTE2_LOW, /* max6695/96 only */ | |
438 | REMOTE2_HIGH, /* max6695/96 only */ | |
439 | TEMP11_REG_NUM | |
440 | }; | |
441 | ||
1da177e4 LT |
442 | /* |
443 | * Client data (each client gets its own) | |
444 | */ | |
445 | ||
446 | struct lm90_data { | |
1de8b250 | 447 | struct i2c_client *client; |
eb1c8f43 GR |
448 | u32 channel_config[4]; |
449 | struct hwmon_channel_info temp_info; | |
450 | const struct hwmon_channel_info *info[3]; | |
451 | struct hwmon_chip_info chip; | |
9a61bf63 | 452 | struct mutex update_lock; |
2f83ab77 | 453 | bool valid; /* true if register values are valid */ |
1da177e4 LT |
454 | unsigned long last_updated; /* in jiffies */ |
455 | int kind; | |
4667bcb8 | 456 | u32 flags; |
1da177e4 | 457 | |
38bab98a | 458 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 459 | |
95238364 | 460 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 461 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
462 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
463 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 464 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 465 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 466 | |
1da177e4 | 467 | /* registers values */ |
40465d94 WN |
468 | s8 temp8[TEMP8_REG_NUM]; |
469 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 470 | u8 temp_hyst; |
06e1c0a2 | 471 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
472 | }; |
473 | ||
15b66ab6 GR |
474 | /* |
475 | * Support functions | |
476 | */ | |
477 | ||
478 | /* | |
479 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
480 | * to explicitly ask for a transaction without PEC. | |
481 | */ | |
482 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
483 | { | |
484 | return i2c_smbus_xfer(client->adapter, client->addr, | |
485 | client->flags & ~I2C_CLIENT_PEC, | |
486 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
487 | } | |
488 | ||
489 | /* | |
490 | * It is assumed that client->update_lock is held (unless we are in | |
491 | * detection or initialization steps). This matters when PEC is enabled, | |
492 | * because we don't want the address pointer to change between the write | |
493 | * byte and the read byte transactions. | |
494 | */ | |
37ad04d7 | 495 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
496 | { |
497 | int err; | |
498 | ||
499 | if (client->flags & I2C_CLIENT_PEC) { | |
500 | err = adm1032_write_byte(client, reg); | |
501 | if (err >= 0) | |
502 | err = i2c_smbus_read_byte(client); | |
503 | } else | |
504 | err = i2c_smbus_read_byte_data(client, reg); | |
505 | ||
37ad04d7 | 506 | return err; |
15b66ab6 GR |
507 | } |
508 | ||
37ad04d7 | 509 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 510 | { |
37ad04d7 | 511 | int oldh, newh, l; |
15b66ab6 GR |
512 | |
513 | /* | |
514 | * There is a trick here. We have to read two registers to have the | |
515 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 516 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
517 | * the one-shot conversion register, which we don't want to do |
518 | * (disables hardware monitoring) or monitor the busy bit, which is | |
519 | * impossible (we can't read the values and monitor that bit at the | |
520 | * exact same time). So the solution used here is to read the high | |
521 | * byte once, then the low byte, then the high byte again. If the new | |
522 | * high byte matches the old one, then we have a valid reading. Else | |
523 | * we have to read the low byte again, and now we believe we have a | |
524 | * correct reading. | |
525 | */ | |
37ad04d7 GR |
526 | oldh = lm90_read_reg(client, regh); |
527 | if (oldh < 0) | |
528 | return oldh; | |
529 | l = lm90_read_reg(client, regl); | |
530 | if (l < 0) | |
531 | return l; | |
532 | newh = lm90_read_reg(client, regh); | |
533 | if (newh < 0) | |
534 | return newh; | |
15b66ab6 | 535 | if (oldh != newh) { |
37ad04d7 GR |
536 | l = lm90_read_reg(client, regl); |
537 | if (l < 0) | |
538 | return l; | |
15b66ab6 | 539 | } |
37ad04d7 | 540 | return (newh << 8) | l; |
15b66ab6 GR |
541 | } |
542 | ||
543 | /* | |
544 | * client->update_lock must be held when calling this function (unless we are | |
545 | * in detection or initialization steps), and while a remote channel other | |
546 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
547 | * external channel 0 before releasing the lock. This is necessary because | |
548 | * various registers have different meanings as a result of selecting a | |
549 | * non-default remote channel. | |
550 | */ | |
37ad04d7 GR |
551 | static inline int lm90_select_remote_channel(struct i2c_client *client, |
552 | struct lm90_data *data, | |
553 | int channel) | |
15b66ab6 | 554 | { |
37ad04d7 | 555 | int config; |
15b66ab6 GR |
556 | |
557 | if (data->kind == max6696) { | |
37ad04d7 GR |
558 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
559 | if (config < 0) | |
560 | return config; | |
15b66ab6 GR |
561 | config &= ~0x08; |
562 | if (channel) | |
563 | config |= 0x08; | |
564 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
565 | config); | |
566 | } | |
37ad04d7 | 567 | return 0; |
15b66ab6 GR |
568 | } |
569 | ||
0c01b644 GR |
570 | /* |
571 | * Set conversion rate. | |
572 | * client->update_lock must be held when calling this function (unless we are | |
573 | * in detection or initialization steps). | |
574 | */ | |
eb1c8f43 GR |
575 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
576 | unsigned int interval) | |
0c01b644 | 577 | { |
0c01b644 | 578 | unsigned int update_interval; |
eb1c8f43 | 579 | int i, err; |
0c01b644 GR |
580 | |
581 | /* Shift calculations to avoid rounding errors */ | |
582 | interval <<= 6; | |
583 | ||
584 | /* find the nearest update rate */ | |
585 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
586 | i < data->max_convrate; i++, update_interval >>= 1) | |
587 | if (interval >= update_interval * 3 / 4) | |
588 | break; | |
589 | ||
eb1c8f43 | 590 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); |
0c01b644 | 591 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
eb1c8f43 | 592 | return err; |
0c01b644 GR |
593 | } |
594 | ||
10bfef47 GR |
595 | static int lm90_update_limits(struct device *dev) |
596 | { | |
597 | struct lm90_data *data = dev_get_drvdata(dev); | |
598 | struct i2c_client *client = data->client; | |
599 | int val; | |
600 | ||
601 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
602 | if (val < 0) | |
603 | return val; | |
604 | data->temp8[LOCAL_CRIT] = val; | |
605 | ||
606 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
607 | if (val < 0) | |
608 | return val; | |
609 | data->temp8[REMOTE_CRIT] = val; | |
610 | ||
611 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); | |
612 | if (val < 0) | |
613 | return val; | |
614 | data->temp_hyst = val; | |
615 | ||
be9d6374 | 616 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); |
10bfef47 GR |
617 | if (val < 0) |
618 | return val; | |
619 | data->temp11[REMOTE_LOW] = val << 8; | |
620 | ||
621 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
622 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
623 | if (val < 0) | |
624 | return val; | |
625 | data->temp11[REMOTE_LOW] |= val; | |
626 | } | |
627 | ||
628 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
629 | if (val < 0) | |
630 | return val; | |
631 | data->temp11[REMOTE_HIGH] = val << 8; | |
632 | ||
633 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
634 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
635 | if (val < 0) | |
636 | return val; | |
637 | data->temp11[REMOTE_HIGH] |= val; | |
638 | } | |
639 | ||
640 | if (data->flags & LM90_HAVE_OFFSET) { | |
641 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
642 | LM90_REG_R_REMOTE_OFFSL); | |
643 | if (val < 0) | |
644 | return val; | |
645 | data->temp11[REMOTE_OFFSET] = val; | |
646 | } | |
647 | ||
648 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
649 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
650 | if (val < 0) | |
651 | return val; | |
652 | data->temp8[LOCAL_EMERG] = val; | |
653 | ||
654 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
655 | if (val < 0) | |
656 | return val; | |
657 | data->temp8[REMOTE_EMERG] = val; | |
658 | } | |
659 | ||
660 | if (data->kind == max6696) { | |
661 | val = lm90_select_remote_channel(client, data, 1); | |
662 | if (val < 0) | |
663 | return val; | |
664 | ||
665 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
666 | if (val < 0) | |
667 | return val; | |
668 | data->temp8[REMOTE2_CRIT] = val; | |
669 | ||
670 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
671 | if (val < 0) | |
672 | return val; | |
673 | data->temp8[REMOTE2_EMERG] = val; | |
674 | ||
675 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
676 | if (val < 0) | |
677 | return val; | |
678 | data->temp11[REMOTE2_LOW] = val << 8; | |
679 | ||
680 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
681 | if (val < 0) | |
682 | return val; | |
683 | data->temp11[REMOTE2_HIGH] = val << 8; | |
684 | ||
685 | lm90_select_remote_channel(client, data, 0); | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
eb1c8f43 | 691 | static int lm90_update_device(struct device *dev) |
15b66ab6 | 692 | { |
1de8b250 GR |
693 | struct lm90_data *data = dev_get_drvdata(dev); |
694 | struct i2c_client *client = data->client; | |
0c01b644 | 695 | unsigned long next_update; |
eb1c8f43 | 696 | int val; |
15b66ab6 | 697 | |
10bfef47 GR |
698 | if (!data->valid) { |
699 | val = lm90_update_limits(dev); | |
700 | if (val < 0) | |
eb1c8f43 | 701 | return val; |
10bfef47 GR |
702 | } |
703 | ||
78c2c2fe JD |
704 | next_update = data->last_updated + |
705 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 706 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 707 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 708 | |
2f83ab77 | 709 | data->valid = false; |
10bfef47 | 710 | |
37ad04d7 GR |
711 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
712 | if (val < 0) | |
eb1c8f43 | 713 | return val; |
37ad04d7 GR |
714 | data->temp8[LOCAL_LOW] = val; |
715 | ||
716 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
717 | if (val < 0) | |
eb1c8f43 | 718 | return val; |
37ad04d7 GR |
719 | data->temp8[LOCAL_HIGH] = val; |
720 | ||
a095f687 | 721 | if (data->reg_local_ext) { |
37ad04d7 GR |
722 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
723 | data->reg_local_ext); | |
724 | if (val < 0) | |
eb1c8f43 | 725 | return val; |
37ad04d7 | 726 | data->temp11[LOCAL_TEMP] = val; |
15b66ab6 | 727 | } else { |
37ad04d7 GR |
728 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
729 | if (val < 0) | |
eb1c8f43 | 730 | return val; |
37ad04d7 | 731 | data->temp11[LOCAL_TEMP] = val << 8; |
15b66ab6 | 732 | } |
37ad04d7 GR |
733 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
734 | LM90_REG_R_REMOTE_TEMPL); | |
735 | if (val < 0) | |
eb1c8f43 | 736 | return val; |
37ad04d7 GR |
737 | data->temp11[REMOTE_TEMP] = val; |
738 | ||
37ad04d7 GR |
739 | val = lm90_read_reg(client, LM90_REG_R_STATUS); |
740 | if (val < 0) | |
eb1c8f43 | 741 | return val; |
37ad04d7 | 742 | data->alarms = val; /* lower 8 bit of alarms */ |
15b66ab6 GR |
743 | |
744 | if (data->kind == max6696) { | |
37ad04d7 GR |
745 | val = lm90_select_remote_channel(client, data, 1); |
746 | if (val < 0) | |
eb1c8f43 | 747 | return val; |
37ad04d7 | 748 | |
37ad04d7 GR |
749 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
750 | LM90_REG_R_REMOTE_TEMPL); | |
eb1c8f43 GR |
751 | if (val < 0) { |
752 | lm90_select_remote_channel(client, data, 0); | |
753 | return val; | |
754 | } | |
37ad04d7 GR |
755 | data->temp11[REMOTE2_TEMP] = val; |
756 | ||
15b66ab6 GR |
757 | lm90_select_remote_channel(client, data, 0); |
758 | ||
37ad04d7 GR |
759 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); |
760 | if (val < 0) | |
eb1c8f43 | 761 | return val; |
37ad04d7 | 762 | data->alarms |= val << 8; |
15b66ab6 GR |
763 | } |
764 | ||
f36ffeab GR |
765 | /* |
766 | * Re-enable ALERT# output if it was originally enabled and | |
767 | * relevant alarms are all clear | |
768 | */ | |
37ad04d7 GR |
769 | if (!(data->config_orig & 0x80) && |
770 | !(data->alarms & data->alert_alarms)) { | |
771 | val = lm90_read_reg(client, LM90_REG_R_CONFIG1); | |
772 | if (val < 0) | |
eb1c8f43 | 773 | return val; |
15b66ab6 | 774 | |
37ad04d7 | 775 | if (val & 0x80) { |
15b66ab6 GR |
776 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); |
777 | i2c_smbus_write_byte_data(client, | |
778 | LM90_REG_W_CONFIG1, | |
37ad04d7 | 779 | val & ~0x80); |
15b66ab6 GR |
780 | } |
781 | } | |
782 | ||
783 | data->last_updated = jiffies; | |
2f83ab77 | 784 | data->valid = true; |
15b66ab6 GR |
785 | } |
786 | ||
eb1c8f43 | 787 | return 0; |
15b66ab6 GR |
788 | } |
789 | ||
cea50fe2 NC |
790 | /* |
791 | * Conversions | |
792 | * For local temperatures and limits, critical limits and the hysteresis | |
793 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
794 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
795 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
796 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
797 | */ |
798 | ||
9d4d3834 | 799 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
800 | { |
801 | return val * 1000; | |
802 | } | |
803 | ||
271dabf5 BH |
804 | static inline int temp_from_u8(u8 val) |
805 | { | |
806 | return val * 1000; | |
807 | } | |
808 | ||
9d4d3834 | 809 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
810 | { |
811 | return val / 32 * 125; | |
812 | } | |
813 | ||
271dabf5 BH |
814 | static inline int temp_from_u16(u16 val) |
815 | { | |
816 | return val / 32 * 125; | |
817 | } | |
818 | ||
9d4d3834 | 819 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
820 | { |
821 | if (val <= -128000) | |
822 | return -128; | |
823 | if (val >= 127000) | |
824 | return 127; | |
825 | if (val < 0) | |
826 | return (val - 500) / 1000; | |
827 | return (val + 500) / 1000; | |
828 | } | |
829 | ||
271dabf5 BH |
830 | static u8 temp_to_u8(long val) |
831 | { | |
832 | if (val <= 0) | |
833 | return 0; | |
834 | if (val >= 255000) | |
835 | return 255; | |
836 | return (val + 500) / 1000; | |
837 | } | |
838 | ||
9d4d3834 | 839 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
840 | { |
841 | if (val <= -128000) | |
842 | return 0x8000; | |
843 | if (val >= 127875) | |
844 | return 0x7FE0; | |
845 | if (val < 0) | |
846 | return (val - 62) / 125 * 32; | |
847 | return (val + 62) / 125 * 32; | |
848 | } | |
849 | ||
850 | static u8 hyst_to_reg(long val) | |
851 | { | |
852 | if (val <= 0) | |
853 | return 0; | |
854 | if (val >= 30500) | |
855 | return 31; | |
856 | return (val + 500) / 1000; | |
857 | } | |
858 | ||
859 | /* | |
23b2d477 NC |
860 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
861 | * attempts to write values that are outside the range 0 < temp < 127 are | |
862 | * treated as the boundary value. | |
863 | * | |
864 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
865 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 866 | */ |
9d4d3834 | 867 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 868 | { |
23b2d477 NC |
869 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
870 | return (val - 64) * 1000; | |
589f707c | 871 | return temp_from_s8(val); |
cea50fe2 NC |
872 | } |
873 | ||
9d4d3834 | 874 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 875 | { |
23b2d477 NC |
876 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
877 | return (val - 0x4000) / 64 * 250; | |
589f707c | 878 | return temp_from_s16(val); |
23b2d477 NC |
879 | } |
880 | ||
9d4d3834 | 881 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
882 | { |
883 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
884 | if (val <= -64000) | |
885 | return 0; | |
886 | if (val >= 191000) | |
887 | return 0xFF; | |
888 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 889 | } |
589f707c GR |
890 | if (val <= 0) |
891 | return 0; | |
892 | if (val >= 127000) | |
893 | return 127; | |
894 | return (val + 500) / 1000; | |
23b2d477 NC |
895 | } |
896 | ||
9d4d3834 | 897 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
898 | { |
899 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
900 | if (val <= -64000) | |
901 | return 0; | |
902 | if (val >= 191750) | |
903 | return 0xFFC0; | |
904 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 905 | } |
589f707c GR |
906 | if (val <= 0) |
907 | return 0; | |
908 | if (val >= 127750) | |
909 | return 0x7FC0; | |
910 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
911 | } |
912 | ||
eb1c8f43 | 913 | /* pec used for ADM1032 only */ |
e57959a6 | 914 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
eb1c8f43 | 915 | char *buf) |
30d7394b | 916 | { |
eb1c8f43 | 917 | struct i2c_client *client = to_i2c_client(dev); |
97ae60bb | 918 | |
eb1c8f43 | 919 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
30d7394b JD |
920 | } |
921 | ||
e57959a6 JL |
922 | static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
923 | const char *buf, size_t count) | |
30d7394b | 924 | { |
eb1c8f43 | 925 | struct i2c_client *client = to_i2c_client(dev); |
11e57812 GR |
926 | long val; |
927 | int err; | |
928 | ||
179c4fdb | 929 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
930 | if (err < 0) |
931 | return err; | |
30d7394b | 932 | |
eb1c8f43 GR |
933 | switch (val) { |
934 | case 0: | |
935 | client->flags &= ~I2C_CLIENT_PEC; | |
936 | break; | |
937 | case 1: | |
938 | client->flags |= I2C_CLIENT_PEC; | |
939 | break; | |
940 | default: | |
941 | return -EINVAL; | |
942 | } | |
06e1c0a2 | 943 | |
30d7394b | 944 | return count; |
1da177e4 | 945 | } |
30d7394b | 946 | |
e57959a6 | 947 | static DEVICE_ATTR_RW(pec); |
eb1c8f43 GR |
948 | |
949 | static int lm90_get_temp11(struct lm90_data *data, int index) | |
30d7394b | 950 | { |
eb1c8f43 | 951 | s16 temp11 = data->temp11[index]; |
23b2d477 NC |
952 | int temp; |
953 | ||
1daaceb2 | 954 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 955 | temp = temp_from_u16_adt7461(data, temp11); |
271dabf5 | 956 | else if (data->kind == max6646) |
eb1c8f43 | 957 | temp = temp_from_u16(temp11); |
23b2d477 | 958 | else |
eb1c8f43 | 959 | temp = temp_from_s16(temp11); |
23b2d477 | 960 | |
97ae60bb | 961 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 962 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
963 | temp += 16000; |
964 | ||
eb1c8f43 | 965 | return temp; |
1da177e4 | 966 | } |
30d7394b | 967 | |
eb1c8f43 | 968 | static int lm90_set_temp11(struct lm90_data *data, int index, long val) |
30d7394b | 969 | { |
eb1c8f43 | 970 | static struct reg { |
96512861 GR |
971 | u8 high; |
972 | u8 low; | |
eb1c8f43 GR |
973 | } reg[] = { |
974 | [REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
975 | [REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }, | |
976 | [REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL }, | |
977 | [REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
978 | [REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL } | |
30d7394b | 979 | }; |
1de8b250 | 980 | struct i2c_client *client = data->client; |
eb1c8f43 | 981 | struct reg *regp = ®[index]; |
11e57812 GR |
982 | int err; |
983 | ||
97ae60bb | 984 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 985 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
986 | val -= 16000; |
987 | ||
1daaceb2 | 988 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 989 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 990 | else if (data->kind == max6646) |
96512861 | 991 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 992 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 993 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 994 | else |
96512861 | 995 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 996 | |
eb1c8f43 GR |
997 | lm90_select_remote_channel(client, data, index >= 3); |
998 | err = i2c_smbus_write_byte_data(client, regp->high, | |
96512861 | 999 | data->temp11[index] >> 8); |
eb1c8f43 GR |
1000 | if (err < 0) |
1001 | return err; | |
88073bb1 | 1002 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
eb1c8f43 GR |
1003 | err = i2c_smbus_write_byte_data(client, regp->low, |
1004 | data->temp11[index] & 0xff); | |
06e1c0a2 | 1005 | |
eb1c8f43 GR |
1006 | lm90_select_remote_channel(client, data, 0); |
1007 | return err; | |
1da177e4 | 1008 | } |
30d7394b | 1009 | |
eb1c8f43 | 1010 | static int lm90_get_temp8(struct lm90_data *data, int index) |
30d7394b | 1011 | { |
eb1c8f43 | 1012 | s8 temp8 = data->temp8[index]; |
23b2d477 NC |
1013 | int temp; |
1014 | ||
1daaceb2 | 1015 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 1016 | temp = temp_from_u8_adt7461(data, temp8); |
ec38fa2b | 1017 | else if (data->kind == max6646) |
eb1c8f43 | 1018 | temp = temp_from_u8(temp8); |
23b2d477 | 1019 | else |
eb1c8f43 | 1020 | temp = temp_from_s8(temp8); |
23b2d477 | 1021 | |
97ae60bb | 1022 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1023 | if (data->kind == lm99 && index == 3) |
97ae60bb JD |
1024 | temp += 16000; |
1025 | ||
eb1c8f43 | 1026 | return temp; |
1da177e4 | 1027 | } |
1da177e4 | 1028 | |
eb1c8f43 | 1029 | static int lm90_set_temp8(struct lm90_data *data, int index, long val) |
1da177e4 | 1030 | { |
eb1c8f43 GR |
1031 | static const u8 reg[TEMP8_REG_NUM] = { |
1032 | LM90_REG_W_LOCAL_LOW, | |
1033 | LM90_REG_W_LOCAL_HIGH, | |
1034 | LM90_REG_W_LOCAL_CRIT, | |
1035 | LM90_REG_W_REMOTE_CRIT, | |
1036 | MAX6659_REG_W_LOCAL_EMERG, | |
1037 | MAX6659_REG_W_REMOTE_EMERG, | |
1038 | LM90_REG_W_REMOTE_CRIT, | |
1039 | MAX6659_REG_W_REMOTE_EMERG, | |
1040 | }; | |
1de8b250 | 1041 | struct i2c_client *client = data->client; |
11e57812 | 1042 | int err; |
1da177e4 | 1043 | |
eb1c8f43 GR |
1044 | /* +16 degrees offset for temp2 for the LM99 */ |
1045 | if (data->kind == lm99 && index == 3) | |
1046 | val -= 16000; | |
11e57812 | 1047 | |
1daaceb2 | 1048 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 1049 | data->temp8[index] = temp_to_u8_adt7461(data, val); |
ec38fa2b | 1050 | else if (data->kind == max6646) |
eb1c8f43 | 1051 | data->temp8[index] = temp_to_u8(val); |
ec38fa2b | 1052 | else |
eb1c8f43 | 1053 | data->temp8[index] = temp_to_s8(val); |
ec38fa2b | 1054 | |
eb1c8f43 GR |
1055 | lm90_select_remote_channel(client, data, index >= 6); |
1056 | err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]); | |
1057 | lm90_select_remote_channel(client, data, 0); | |
37ad04d7 | 1058 | |
eb1c8f43 | 1059 | return err; |
1da177e4 LT |
1060 | } |
1061 | ||
eb1c8f43 | 1062 | static int lm90_get_temphyst(struct lm90_data *data, int index) |
2d45771e | 1063 | { |
eb1c8f43 | 1064 | int temp; |
37ad04d7 | 1065 | |
eb1c8f43 GR |
1066 | if (data->kind == adt7461 || data->kind == tmp451) |
1067 | temp = temp_from_u8_adt7461(data, data->temp8[index]); | |
1068 | else if (data->kind == max6646) | |
1069 | temp = temp_from_u8(data->temp8[index]); | |
1070 | else | |
1071 | temp = temp_from_s8(data->temp8[index]); | |
2d45771e | 1072 | |
eb1c8f43 GR |
1073 | /* +16 degrees offset for temp2 for the LM99 */ |
1074 | if (data->kind == lm99 && index == 3) | |
1075 | temp += 16000; | |
0c01b644 | 1076 | |
eb1c8f43 | 1077 | return temp - temp_from_s8(data->temp_hyst); |
0c01b644 GR |
1078 | } |
1079 | ||
eb1c8f43 | 1080 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
0c01b644 | 1081 | { |
1de8b250 | 1082 | struct i2c_client *client = data->client; |
eb1c8f43 | 1083 | int temp; |
0c01b644 GR |
1084 | int err; |
1085 | ||
eb1c8f43 GR |
1086 | if (data->kind == adt7461 || data->kind == tmp451) |
1087 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); | |
1088 | else if (data->kind == max6646) | |
1089 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); | |
1090 | else | |
1091 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); | |
0c01b644 | 1092 | |
eb1c8f43 GR |
1093 | data->temp_hyst = hyst_to_reg(temp - val); |
1094 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, | |
1095 | data->temp_hyst); | |
1096 | return err; | |
0c01b644 GR |
1097 | } |
1098 | ||
eb1c8f43 GR |
1099 | static const u8 lm90_temp_index[3] = { |
1100 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP | |
0e39e01c JD |
1101 | }; |
1102 | ||
eb1c8f43 GR |
1103 | static const u8 lm90_temp_min_index[3] = { |
1104 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW | |
0e39e01c JD |
1105 | }; |
1106 | ||
eb1c8f43 GR |
1107 | static const u8 lm90_temp_max_index[3] = { |
1108 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH | |
742192f5 GR |
1109 | }; |
1110 | ||
eb1c8f43 GR |
1111 | static const u8 lm90_temp_crit_index[3] = { |
1112 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT | |
742192f5 GR |
1113 | }; |
1114 | ||
eb1c8f43 GR |
1115 | static const u8 lm90_temp_emerg_index[3] = { |
1116 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG | |
6948708d GR |
1117 | }; |
1118 | ||
eb1c8f43 | 1119 | static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; |
e9572fdd | 1120 | static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 }; |
eb1c8f43 GR |
1121 | static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; |
1122 | static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; | |
1123 | static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; | |
6948708d | 1124 | |
eb1c8f43 GR |
1125 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1126 | { | |
1127 | struct lm90_data *data = dev_get_drvdata(dev); | |
1128 | int err; | |
06e1c0a2 | 1129 | |
eb1c8f43 GR |
1130 | mutex_lock(&data->update_lock); |
1131 | err = lm90_update_device(dev); | |
1132 | mutex_unlock(&data->update_lock); | |
1133 | if (err) | |
1134 | return err; | |
06e1c0a2 | 1135 | |
eb1c8f43 GR |
1136 | switch (attr) { |
1137 | case hwmon_temp_input: | |
1138 | *val = lm90_get_temp11(data, lm90_temp_index[channel]); | |
1139 | break; | |
1140 | case hwmon_temp_min_alarm: | |
1141 | *val = (data->alarms >> lm90_min_alarm_bits[channel]) & 1; | |
1142 | break; | |
1143 | case hwmon_temp_max_alarm: | |
1144 | *val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1; | |
1145 | break; | |
1146 | case hwmon_temp_crit_alarm: | |
1147 | *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; | |
1148 | break; | |
1149 | case hwmon_temp_emergency_alarm: | |
1150 | *val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1; | |
1151 | break; | |
1152 | case hwmon_temp_fault: | |
1153 | *val = (data->alarms >> lm90_fault_bits[channel]) & 1; | |
1154 | break; | |
1155 | case hwmon_temp_min: | |
1156 | if (channel == 0) | |
1157 | *val = lm90_get_temp8(data, | |
1158 | lm90_temp_min_index[channel]); | |
1159 | else | |
1160 | *val = lm90_get_temp11(data, | |
1161 | lm90_temp_min_index[channel]); | |
1162 | break; | |
1163 | case hwmon_temp_max: | |
1164 | if (channel == 0) | |
1165 | *val = lm90_get_temp8(data, | |
1166 | lm90_temp_max_index[channel]); | |
1167 | else | |
1168 | *val = lm90_get_temp11(data, | |
1169 | lm90_temp_max_index[channel]); | |
1170 | break; | |
1171 | case hwmon_temp_crit: | |
1172 | *val = lm90_get_temp8(data, lm90_temp_crit_index[channel]); | |
1173 | break; | |
1174 | case hwmon_temp_crit_hyst: | |
1175 | *val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]); | |
1176 | break; | |
1177 | case hwmon_temp_emergency: | |
1178 | *val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]); | |
1179 | break; | |
1180 | case hwmon_temp_emergency_hyst: | |
1181 | *val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]); | |
1182 | break; | |
1183 | case hwmon_temp_offset: | |
1184 | *val = lm90_get_temp11(data, REMOTE_OFFSET); | |
1185 | break; | |
1186 | default: | |
1187 | return -EOPNOTSUPP; | |
1188 | } | |
1189 | return 0; | |
1190 | } | |
06e1c0a2 | 1191 | |
eb1c8f43 GR |
1192 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1193 | { | |
1194 | struct lm90_data *data = dev_get_drvdata(dev); | |
1195 | int err; | |
06e1c0a2 | 1196 | |
eb1c8f43 | 1197 | mutex_lock(&data->update_lock); |
06e1c0a2 | 1198 | |
eb1c8f43 GR |
1199 | err = lm90_update_device(dev); |
1200 | if (err) | |
1201 | goto error; | |
1202 | ||
1203 | switch (attr) { | |
1204 | case hwmon_temp_min: | |
1205 | if (channel == 0) | |
1206 | err = lm90_set_temp8(data, | |
1207 | lm90_temp_min_index[channel], | |
1208 | val); | |
1209 | else | |
1210 | err = lm90_set_temp11(data, | |
1211 | lm90_temp_min_index[channel], | |
1212 | val); | |
1213 | break; | |
1214 | case hwmon_temp_max: | |
1215 | if (channel == 0) | |
1216 | err = lm90_set_temp8(data, | |
1217 | lm90_temp_max_index[channel], | |
1218 | val); | |
1219 | else | |
1220 | err = lm90_set_temp11(data, | |
1221 | lm90_temp_max_index[channel], | |
1222 | val); | |
1223 | break; | |
1224 | case hwmon_temp_crit: | |
1225 | err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val); | |
1226 | break; | |
1227 | case hwmon_temp_crit_hyst: | |
1228 | err = lm90_set_temphyst(data, val); | |
1229 | break; | |
1230 | case hwmon_temp_emergency: | |
1231 | err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val); | |
1232 | break; | |
1233 | case hwmon_temp_offset: | |
1234 | err = lm90_set_temp11(data, REMOTE_OFFSET, val); | |
1235 | break; | |
1236 | default: | |
1237 | err = -EOPNOTSUPP; | |
1238 | break; | |
1239 | } | |
1240 | error: | |
1241 | mutex_unlock(&data->update_lock); | |
1242 | ||
1243 | return err; | |
1244 | } | |
1245 | ||
1246 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) | |
c3df5806 | 1247 | { |
eb1c8f43 GR |
1248 | switch (attr) { |
1249 | case hwmon_temp_input: | |
1250 | case hwmon_temp_min_alarm: | |
1251 | case hwmon_temp_max_alarm: | |
1252 | case hwmon_temp_crit_alarm: | |
1253 | case hwmon_temp_emergency_alarm: | |
1254 | case hwmon_temp_emergency_hyst: | |
1255 | case hwmon_temp_fault: | |
3334851d | 1256 | return 0444; |
eb1c8f43 GR |
1257 | case hwmon_temp_min: |
1258 | case hwmon_temp_max: | |
1259 | case hwmon_temp_crit: | |
1260 | case hwmon_temp_emergency: | |
1261 | case hwmon_temp_offset: | |
3334851d | 1262 | return 0644; |
eb1c8f43 GR |
1263 | case hwmon_temp_crit_hyst: |
1264 | if (channel == 0) | |
3334851d GR |
1265 | return 0644; |
1266 | return 0444; | |
eb1c8f43 GR |
1267 | default: |
1268 | return 0; | |
1269 | } | |
c3df5806 JD |
1270 | } |
1271 | ||
eb1c8f43 | 1272 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
c3df5806 | 1273 | { |
eb1c8f43 | 1274 | struct lm90_data *data = dev_get_drvdata(dev); |
11e57812 GR |
1275 | int err; |
1276 | ||
eb1c8f43 GR |
1277 | mutex_lock(&data->update_lock); |
1278 | err = lm90_update_device(dev); | |
1279 | mutex_unlock(&data->update_lock); | |
1280 | if (err) | |
11e57812 | 1281 | return err; |
c3df5806 | 1282 | |
eb1c8f43 GR |
1283 | switch (attr) { |
1284 | case hwmon_chip_update_interval: | |
1285 | *val = data->update_interval; | |
c3df5806 | 1286 | break; |
eb1c8f43 GR |
1287 | case hwmon_chip_alarms: |
1288 | *val = data->alarms; | |
c3df5806 JD |
1289 | break; |
1290 | default: | |
eb1c8f43 | 1291 | return -EOPNOTSUPP; |
c3df5806 JD |
1292 | } |
1293 | ||
eb1c8f43 | 1294 | return 0; |
c3df5806 JD |
1295 | } |
1296 | ||
eb1c8f43 GR |
1297 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1298 | { | |
1299 | struct lm90_data *data = dev_get_drvdata(dev); | |
1300 | struct i2c_client *client = data->client; | |
1301 | int err; | |
c3df5806 | 1302 | |
eb1c8f43 GR |
1303 | mutex_lock(&data->update_lock); |
1304 | ||
1305 | err = lm90_update_device(dev); | |
1306 | if (err) | |
1307 | goto error; | |
1308 | ||
1309 | switch (attr) { | |
1310 | case hwmon_chip_update_interval: | |
1311 | err = lm90_set_convrate(client, data, | |
1312 | clamp_val(val, 0, 100000)); | |
1313 | break; | |
1314 | default: | |
1315 | err = -EOPNOTSUPP; | |
1316 | break; | |
1317 | } | |
1318 | error: | |
1319 | mutex_unlock(&data->update_lock); | |
1320 | ||
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) | |
1325 | { | |
1326 | switch (attr) { | |
1327 | case hwmon_chip_update_interval: | |
3334851d | 1328 | return 0644; |
eb1c8f43 | 1329 | case hwmon_chip_alarms: |
3334851d | 1330 | return 0444; |
eb1c8f43 GR |
1331 | default: |
1332 | return 0; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, | |
1337 | u32 attr, int channel, long *val) | |
1338 | { | |
1339 | switch (type) { | |
1340 | case hwmon_chip: | |
1341 | return lm90_chip_read(dev, attr, channel, val); | |
1342 | case hwmon_temp: | |
1343 | return lm90_temp_read(dev, attr, channel, val); | |
1344 | default: | |
1345 | return -EOPNOTSUPP; | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, | |
1350 | u32 attr, int channel, long val) | |
1351 | { | |
1352 | switch (type) { | |
1353 | case hwmon_chip: | |
1354 | return lm90_chip_write(dev, attr, channel, val); | |
1355 | case hwmon_temp: | |
1356 | return lm90_temp_write(dev, attr, channel, val); | |
1357 | default: | |
1358 | return -EOPNOTSUPP; | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, | |
1363 | u32 attr, int channel) | |
1364 | { | |
1365 | switch (type) { | |
1366 | case hwmon_chip: | |
1367 | return lm90_chip_is_visible(data, attr, channel); | |
1368 | case hwmon_temp: | |
1369 | return lm90_temp_is_visible(data, attr, channel); | |
1370 | default: | |
1371 | return 0; | |
1372 | } | |
1373 | } | |
1da177e4 | 1374 | |
15b66ab6 | 1375 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1376 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1377 | struct i2c_board_info *info) |
8256fe0f | 1378 | { |
b2589ab0 JD |
1379 | struct i2c_adapter *adapter = client->adapter; |
1380 | int address = client->addr; | |
15b66ab6 | 1381 | const char *name = NULL; |
b2589ab0 | 1382 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1383 | |
15b66ab6 GR |
1384 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1385 | return -ENODEV; | |
1da177e4 | 1386 | |
8f2fa77c | 1387 | /* detection and identification */ |
b2589ab0 JD |
1388 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1389 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1390 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1391 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1392 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1393 | return -ENODEV; |
1394 | ||
f90be42f | 1395 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1396 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1397 | if (config2 < 0) | |
9b0e8526 | 1398 | return -ENODEV; |
f90be42f | 1399 | } else |
b2589ab0 | 1400 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1401 | |
f90be42f JD |
1402 | if ((address == 0x4C || address == 0x4D) |
1403 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1404 | if ((config1 & 0x2A) == 0x00 |
1405 | && (config2 & 0xF8) == 0x00 | |
1406 | && convrate <= 0x09) { | |
8f2fa77c JD |
1407 | if (address == 0x4C |
1408 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1409 | name = "lm90"; | |
32c82a93 | 1410 | } else |
8f2fa77c JD |
1411 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1412 | name = "lm99"; | |
1413 | dev_info(&adapter->dev, | |
1414 | "Assuming LM99 chip at 0x%02x\n", | |
1415 | address); | |
1416 | dev_info(&adapter->dev, | |
1417 | "If it is an LM89, instantiate it " | |
1418 | "with the new_device sysfs " | |
1419 | "interface\n"); | |
271dabf5 | 1420 | } else |
8f2fa77c JD |
1421 | if (address == 0x4C |
1422 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1423 | name = "lm86"; | |
1da177e4 LT |
1424 | } |
1425 | } | |
8f2fa77c JD |
1426 | } else |
1427 | if ((address == 0x4C || address == 0x4D) | |
1428 | && man_id == 0x41) { /* Analog Devices */ | |
1429 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1430 | && (config1 & 0x3F) == 0x00 |
1431 | && convrate <= 0x0A) { | |
8f2fa77c | 1432 | name = "adm1032"; |
f36ffeab GR |
1433 | /* |
1434 | * The ADM1032 supports PEC, but only if combined | |
1435 | * transactions are not used. | |
1436 | */ | |
8f2fa77c JD |
1437 | if (i2c_check_functionality(adapter, |
1438 | I2C_FUNC_SMBUS_BYTE)) | |
1439 | info->flags |= I2C_CLIENT_PEC; | |
1440 | } else | |
1441 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1442 | && (config1 & 0x1B) == 0x00 |
1443 | && convrate <= 0x0A) { | |
8f2fa77c | 1444 | name = "adt7461"; |
5a4e5e6a GR |
1445 | } else |
1446 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1447 | && (config1 & 0x1B) == 0x00 |
1448 | && convrate <= 0x0A) { | |
5a4e5e6a | 1449 | name = "adt7461a"; |
8f2fa77c JD |
1450 | } |
1451 | } else | |
1452 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1453 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1454 | |
1455 | /* | |
1456 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1457 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1458 | * exists, both readings will reflect the same value. Otherwise, | |
1459 | * the readings will be different. | |
1460 | */ | |
b2589ab0 JD |
1461 | emerg = i2c_smbus_read_byte_data(client, |
1462 | MAX6659_REG_R_REMOTE_EMERG); | |
1463 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1464 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1465 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1466 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1467 | status2 = i2c_smbus_read_byte_data(client, |
1468 | MAX6696_REG_R_STATUS2); | |
1469 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1470 | return -ENODEV; |
1471 | ||
8f2fa77c JD |
1472 | /* |
1473 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1474 | * register. Reading from that address will return the last | |
1475 | * read value, which in our case is those of the man_id | |
1476 | * register. Likewise, the config1 register seems to lack a | |
1477 | * low nibble, so the value will be those of the previous | |
1478 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1479 | * MAX6659 has a third set of upper temperature limit registers. |
1480 | * Those registers also return values on MAX6657 and MAX6658, | |
1481 | * thus the only way to detect MAX6659 is by its address. | |
1482 | * For this reason it will be mis-detected as MAX6657 if its | |
1483 | * address is 0x4C. | |
8f2fa77c JD |
1484 | */ |
1485 | if (chip_id == man_id | |
13c84951 | 1486 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1487 | && (config1 & 0x1F) == (man_id & 0x0F) |
1488 | && convrate <= 0x09) { | |
13c84951 GR |
1489 | if (address == 0x4C) |
1490 | name = "max6657"; | |
1491 | else | |
1492 | name = "max6659"; | |
8f2fa77c | 1493 | } else |
06e1c0a2 GR |
1494 | /* |
1495 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1496 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1497 | * register is unused and should return zero when read. Bit 0 of | |
1498 | * the status2 register is unused and should return zero when | |
1499 | * read. | |
1500 | * | |
1501 | * MAX6695 and MAX6696 have an additional set of temperature | |
1502 | * limit registers. We can detect those chips by checking if | |
1503 | * one of those registers exists. | |
1504 | */ | |
1505 | if (chip_id == 0x01 | |
b2589ab0 JD |
1506 | && (config1 & 0x10) == 0x00 |
1507 | && (status2 & 0x01) == 0x00 | |
1508 | && emerg == emerg2 | |
1509 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1510 | name = "max6696"; |
1511 | } else | |
8f2fa77c JD |
1512 | /* |
1513 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1514 | * revision of the chip. The lowest bit of the config1 register | |
1515 | * is unused and should return zero when read, so should the | |
1516 | * second to last bit of config1 (software reset). | |
1517 | */ | |
1518 | if (chip_id == 0x01 | |
b2589ab0 JD |
1519 | && (config1 & 0x03) == 0x00 |
1520 | && convrate <= 0x07) { | |
8f2fa77c JD |
1521 | name = "max6680"; |
1522 | } else | |
1523 | /* | |
1524 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1525 | * revision of the chip. The lowest 6 bits of the config1 | |
1526 | * register are unused and should return zero when read. | |
1527 | */ | |
1528 | if (chip_id == 0x59 | |
b2589ab0 JD |
1529 | && (config1 & 0x3f) == 0x00 |
1530 | && convrate <= 0x07) { | |
8f2fa77c | 1531 | name = "max6646"; |
1da177e4 | 1532 | } |
6771ea1f JD |
1533 | } else |
1534 | if (address == 0x4C | |
1535 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1536 | if ((config1 & 0x2A) == 0x00 |
1537 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1538 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1539 | && convrate <= 0x09) { |
c4f99a2b JD |
1540 | name = "w83l771"; |
1541 | } else | |
1542 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1543 | && convrate <= 0x08) { |
c4f99a2b JD |
1544 | name = "w83l771"; |
1545 | } | |
6771ea1f | 1546 | } |
2ef01793 | 1547 | } else |
6d101c58 JD |
1548 | if (address >= 0x48 && address <= 0x4F |
1549 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1550 | if (chip_id == 0x00 |
b2589ab0 JD |
1551 | && (config1 & 0x2A) == 0x00 |
1552 | && (config2 & 0xFE) == 0x00 | |
1553 | && convrate <= 0x09) { | |
2ef01793 SD |
1554 | name = "sa56004"; |
1555 | } | |
ae544f64 GR |
1556 | } else |
1557 | if ((address == 0x4C || address == 0x4D) | |
1558 | && man_id == 0x47) { /* GMT */ | |
1559 | if (chip_id == 0x01 /* G781 */ | |
1560 | && (config1 & 0x3F) == 0x00 | |
1561 | && convrate <= 0x08) | |
1562 | name = "g781"; | |
1daaceb2 WN |
1563 | } else |
1564 | if (address == 0x4C | |
1565 | && man_id == 0x55) { /* Texas Instruments */ | |
1566 | int local_ext; | |
1567 | ||
1568 | local_ext = i2c_smbus_read_byte_data(client, | |
1569 | TMP451_REG_R_LOCAL_TEMPL); | |
1570 | ||
1571 | if (chip_id == 0x00 /* TMP451 */ | |
1572 | && (config1 & 0x1B) == 0x00 | |
1573 | && convrate <= 0x09 | |
1574 | && (local_ext & 0x0F) == 0x00) | |
1575 | name = "tmp451"; | |
1da177e4 LT |
1576 | } |
1577 | ||
8f2fa77c JD |
1578 | if (!name) { /* identification failed */ |
1579 | dev_dbg(&adapter->dev, | |
1580 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1581 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1582 | return -ENODEV; | |
1da177e4 | 1583 | } |
8f2fa77c | 1584 | |
9b0e8526 JD |
1585 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1586 | ||
1587 | return 0; | |
1588 | } | |
1589 | ||
1f17a444 | 1590 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1591 | { |
1f17a444 GR |
1592 | struct lm90_data *data = _data; |
1593 | struct i2c_client *client = data->client; | |
1594 | ||
f7001bb0 GR |
1595 | /* Restore initial configuration */ |
1596 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1597 | data->convrate_orig); | |
1598 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1599 | data->config_orig); | |
1600 | } | |
1601 | ||
37ad04d7 | 1602 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1603 | { |
37ad04d7 | 1604 | int config, convrate; |
15b66ab6 | 1605 | |
37ad04d7 GR |
1606 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1607 | if (convrate < 0) | |
1608 | return convrate; | |
0c01b644 GR |
1609 | data->convrate_orig = convrate; |
1610 | ||
15b66ab6 GR |
1611 | /* |
1612 | * Start the conversions. | |
1613 | */ | |
0c01b644 | 1614 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
37ad04d7 GR |
1615 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1616 | if (config < 0) | |
1617 | return config; | |
15b66ab6 GR |
1618 | data->config_orig = config; |
1619 | ||
1620 | /* Check Temperature Range Select */ | |
1daaceb2 | 1621 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1622 | if (config & 0x04) |
1623 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1628 | * 0.125 degree resolution) and range (0x08, extend range | |
1629 | * to -64 degree) mode for the remote temperature sensor. | |
1630 | */ | |
1631 | if (data->kind == max6680) | |
1632 | config |= 0x18; | |
1633 | ||
1634 | /* | |
1635 | * Select external channel 0 for max6695/96 | |
1636 | */ | |
1637 | if (data->kind == max6696) | |
1638 | config &= ~0x08; | |
1639 | ||
1640 | config &= 0xBF; /* run */ | |
1641 | if (config != data->config_orig) /* Only write if changed */ | |
1642 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1f17a444 | 1643 | |
c5fcf01b | 1644 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
15b66ab6 GR |
1645 | } |
1646 | ||
072de496 WN |
1647 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1648 | { | |
1649 | struct lm90_data *data = i2c_get_clientdata(client); | |
37ad04d7 | 1650 | int st, st2 = 0; |
072de496 | 1651 | |
37ad04d7 GR |
1652 | st = lm90_read_reg(client, LM90_REG_R_STATUS); |
1653 | if (st < 0) | |
1654 | return false; | |
072de496 | 1655 | |
37ad04d7 GR |
1656 | if (data->kind == max6696) { |
1657 | st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
1658 | if (st2 < 0) | |
1659 | return false; | |
1660 | } | |
072de496 WN |
1661 | |
1662 | *status = st | (st2 << 8); | |
1663 | ||
1664 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1665 | return false; | |
1666 | ||
1667 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1668 | (st2 & MAX6696_STATUS2_LOT2)) | |
1669 | dev_warn(&client->dev, | |
1670 | "temp%d out of range, please check!\n", 1); | |
1671 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1672 | (st2 & MAX6696_STATUS2_ROT2)) | |
1673 | dev_warn(&client->dev, | |
1674 | "temp%d out of range, please check!\n", 2); | |
1675 | if (st & LM90_STATUS_ROPEN) | |
1676 | dev_warn(&client->dev, | |
1677 | "temp%d diode open, please check!\n", 2); | |
1678 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1679 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1680 | dev_warn(&client->dev, | |
1681 | "temp%d out of range, please check!\n", 3); | |
1682 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1683 | dev_warn(&client->dev, | |
1684 | "temp%d diode open, please check!\n", 3); | |
1685 | ||
1686 | return true; | |
1687 | } | |
1688 | ||
109b1283 WN |
1689 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1690 | { | |
1691 | struct i2c_client *client = dev_id; | |
1692 | u16 status; | |
1693 | ||
1694 | if (lm90_is_tripped(client, &status)) | |
1695 | return IRQ_HANDLED; | |
1696 | else | |
1697 | return IRQ_NONE; | |
1698 | } | |
1699 | ||
1f17a444 GR |
1700 | static void lm90_remove_pec(void *dev) |
1701 | { | |
1702 | device_remove_file(dev, &dev_attr_pec); | |
1703 | } | |
1704 | ||
1705 | static void lm90_regulator_disable(void *regulator) | |
1706 | { | |
1707 | regulator_disable(regulator); | |
1708 | } | |
1709 | ||
eb1c8f43 GR |
1710 | |
1711 | static const struct hwmon_ops lm90_ops = { | |
1712 | .is_visible = lm90_is_visible, | |
1713 | .read = lm90_read, | |
1714 | .write = lm90_write, | |
1715 | }; | |
1716 | ||
b2589ab0 | 1717 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1718 | const struct i2c_device_id *id) |
1719 | { | |
b2589ab0 JD |
1720 | struct device *dev = &client->dev; |
1721 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
eb1c8f43 | 1722 | struct hwmon_channel_info *info; |
3e0f964f | 1723 | struct regulator *regulator; |
6e5f62b9 | 1724 | struct device *hwmon_dev; |
eb1c8f43 | 1725 | struct lm90_data *data; |
9b0e8526 | 1726 | int err; |
1da177e4 | 1727 | |
3e0f964f WN |
1728 | regulator = devm_regulator_get(dev, "vcc"); |
1729 | if (IS_ERR(regulator)) | |
1730 | return PTR_ERR(regulator); | |
1731 | ||
1732 | err = regulator_enable(regulator); | |
1733 | if (err < 0) { | |
d89fa686 | 1734 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1735 | return err; |
1736 | } | |
1737 | ||
c5fcf01b GR |
1738 | err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator); |
1739 | if (err) | |
1740 | return err; | |
1f17a444 | 1741 | |
d89fa686 | 1742 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1743 | if (!data) |
1744 | return -ENOMEM; | |
1745 | ||
1de8b250 | 1746 | data->client = client; |
b2589ab0 | 1747 | i2c_set_clientdata(client, data); |
9a61bf63 | 1748 | mutex_init(&data->update_lock); |
1da177e4 | 1749 | |
9b0e8526 | 1750 | /* Set the device type */ |
df8d57bf JMC |
1751 | if (client->dev.of_node) |
1752 | data->kind = (enum chips)of_device_get_match_data(&client->dev); | |
1753 | else | |
1754 | data->kind = id->driver_data; | |
9b0e8526 JD |
1755 | if (data->kind == adm1032) { |
1756 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1757 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1758 | } |
1da177e4 | 1759 | |
f36ffeab GR |
1760 | /* |
1761 | * Different devices have different alarm bits triggering the | |
1762 | * ALERT# output | |
1763 | */ | |
4667bcb8 | 1764 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1765 | |
88073bb1 | 1766 | /* Set chip capabilities */ |
4667bcb8 | 1767 | data->flags = lm90_params[data->kind].flags; |
eb1c8f43 GR |
1768 | |
1769 | data->chip.ops = &lm90_ops; | |
1770 | data->chip.info = data->info; | |
1771 | ||
a4d41e67 GR |
1772 | data->info[0] = HWMON_CHANNEL_INFO(chip, |
1773 | HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS); | |
eb1c8f43 GR |
1774 | data->info[1] = &data->temp_info; |
1775 | ||
1776 | info = &data->temp_info; | |
1777 | info->type = hwmon_temp; | |
1778 | info->config = data->channel_config; | |
1779 | ||
1780 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1781 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1782 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM; | |
1783 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1784 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1785 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; | |
1786 | ||
1787 | if (data->flags & LM90_HAVE_OFFSET) | |
1788 | data->channel_config[1] |= HWMON_T_OFFSET; | |
1789 | ||
1790 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
1791 | data->channel_config[0] |= HWMON_T_EMERGENCY | | |
1792 | HWMON_T_EMERGENCY_HYST; | |
1793 | data->channel_config[1] |= HWMON_T_EMERGENCY | | |
1794 | HWMON_T_EMERGENCY_HYST; | |
1795 | } | |
1796 | ||
1797 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { | |
1798 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; | |
1799 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; | |
1800 | } | |
1801 | ||
1802 | if (data->flags & LM90_HAVE_TEMP3) { | |
1803 | data->channel_config[2] = HWMON_T_INPUT | | |
1804 | HWMON_T_MIN | HWMON_T_MAX | | |
1805 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | | |
1806 | HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST | | |
1807 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | | |
1808 | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM | | |
1809 | HWMON_T_FAULT; | |
1810 | } | |
1811 | ||
a095f687 | 1812 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1813 | |
0c01b644 GR |
1814 | /* Set maximum conversion rate */ |
1815 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1816 | ||
1da177e4 | 1817 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
1818 | err = lm90_init_client(client, data); |
1819 | if (err < 0) { | |
1820 | dev_err(dev, "Failed to initialize device\n"); | |
1821 | return err; | |
1822 | } | |
1da177e4 | 1823 | |
eb1c8f43 GR |
1824 | /* |
1825 | * The 'pec' attribute is attached to the i2c device and thus created | |
1826 | * separately. | |
1827 | */ | |
b2589ab0 JD |
1828 | if (client->flags & I2C_CLIENT_PEC) { |
1829 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1830 | if (err) |
1f17a444 | 1831 | return err; |
c5fcf01b GR |
1832 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
1833 | if (err) | |
1834 | return err; | |
06e1c0a2 | 1835 | } |
0e39e01c | 1836 | |
eb1c8f43 GR |
1837 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
1838 | data, &data->chip, | |
1839 | NULL); | |
6e5f62b9 GR |
1840 | if (IS_ERR(hwmon_dev)) |
1841 | return PTR_ERR(hwmon_dev); | |
943b0830 | 1842 | |
109b1283 WN |
1843 | if (client->irq) { |
1844 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1845 | err = devm_request_threaded_irq(dev, client->irq, | |
1846 | NULL, lm90_irq_thread, | |
1847 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1848 | "lm90", client); | |
1849 | if (err < 0) { | |
1850 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 1851 | return err; |
109b1283 WN |
1852 | } |
1853 | } | |
1854 | ||
1da177e4 LT |
1855 | return 0; |
1856 | } | |
1857 | ||
b4f21054 BT |
1858 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
1859 | unsigned int flag) | |
53de3342 | 1860 | { |
072de496 | 1861 | u16 alarms; |
06e1c0a2 | 1862 | |
b4f21054 BT |
1863 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
1864 | return; | |
1865 | ||
072de496 | 1866 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1867 | /* |
1868 | * Disable ALERT# output, because these chips don't implement | |
1869 | * SMBus alert correctly; they should only hold the alert line | |
1870 | * low briefly. | |
1871 | */ | |
072de496 WN |
1872 | struct lm90_data *data = i2c_get_clientdata(client); |
1873 | ||
37ad04d7 GR |
1874 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
1875 | (alarms & data->alert_alarms)) { | |
1876 | int config; | |
1877 | ||
53de3342 | 1878 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
37ad04d7 GR |
1879 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1880 | if (config >= 0) | |
1881 | i2c_smbus_write_byte_data(client, | |
1882 | LM90_REG_W_CONFIG1, | |
1883 | config | 0x80); | |
53de3342 | 1884 | } |
072de496 WN |
1885 | } else { |
1886 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1887 | } |
1888 | } | |
1889 | ||
15b66ab6 GR |
1890 | static struct i2c_driver lm90_driver = { |
1891 | .class = I2C_CLASS_HWMON, | |
1892 | .driver = { | |
1893 | .name = "lm90", | |
df8d57bf | 1894 | .of_match_table = of_match_ptr(lm90_of_match), |
15b66ab6 GR |
1895 | }, |
1896 | .probe = lm90_probe, | |
15b66ab6 GR |
1897 | .alert = lm90_alert, |
1898 | .id_table = lm90_id, | |
1899 | .detect = lm90_detect, | |
1900 | .address_list = normal_i2c, | |
1901 | }; | |
1da177e4 | 1902 | |
f0967eea | 1903 | module_i2c_driver(lm90_driver); |
1da177e4 | 1904 | |
7c81c60f | 1905 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1906 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1907 | MODULE_LICENSE("GPL"); |