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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 | * | |
f8344f76 GR |
72 | * This driver also supports TMP451 and TMP461 from Texas Instruments. |
73 | * Those devices are supported in both compatibility and extended mode. | |
74 | * They are mostly compatible with ADT7461 except for local temperature | |
75 | * low byte register and max conversion rate. | |
1daaceb2 | 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, |
f8344f76 | 115 | max6646, w83l771, max6696, sa56004, g781, tmp451, tmp461, 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 | ||
f8344f76 | 171 | /* TMP451/TMP461 registers */ |
1daaceb2 | 172 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 |
f8344f76 GR |
173 | #define TMP451_REG_CONALERT 0x22 |
174 | ||
175 | #define TMP461_REG_CHEN 0x16 | |
176 | #define TMP461_REG_DFC 0x24 | |
1daaceb2 | 177 | |
23b2d477 NC |
178 | /* |
179 | * Device flags | |
180 | */ | |
88073bb1 GR |
181 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
182 | /* Device features */ | |
183 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 184 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 185 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
186 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
187 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 188 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
f347e249 GR |
189 | #define LM90_HAVE_EXTENDED_TEMP (1 << 8) /* extended temperature support*/ |
190 | #define LM90_PAUSE_FOR_CONFIG (1 << 9) /* Pause conversion for config */ | |
23b2d477 | 191 | |
072de496 WN |
192 | /* LM90 status */ |
193 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
194 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
195 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
196 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
197 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
198 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
199 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
200 | ||
201 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
202 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
203 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
204 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
205 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
206 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
207 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
208 | ||
1da177e4 LT |
209 | /* |
210 | * Driver data (common to all clients) | |
211 | */ | |
212 | ||
9b0e8526 JD |
213 | static const struct i2c_device_id lm90_id[] = { |
214 | { "adm1032", adm1032 }, | |
215 | { "adt7461", adt7461 }, | |
5a4e5e6a | 216 | { "adt7461a", adt7461 }, |
ae544f64 | 217 | { "g781", g781 }, |
9b0e8526 JD |
218 | { "lm90", lm90 }, |
219 | { "lm86", lm86 }, | |
97ae60bb JD |
220 | { "lm89", lm86 }, |
221 | { "lm99", lm99 }, | |
271dabf5 BH |
222 | { "max6646", max6646 }, |
223 | { "max6647", max6646 }, | |
224 | { "max6649", max6646 }, | |
229d495d | 225 | { "max6654", max6654 }, |
9b0e8526 JD |
226 | { "max6657", max6657 }, |
227 | { "max6658", max6657 }, | |
13c84951 | 228 | { "max6659", max6659 }, |
9b0e8526 JD |
229 | { "max6680", max6680 }, |
230 | { "max6681", max6680 }, | |
06e1c0a2 GR |
231 | { "max6695", max6696 }, |
232 | { "max6696", max6696 }, | |
5a4e5e6a | 233 | { "nct1008", adt7461 }, |
6771ea1f | 234 | { "w83l771", w83l771 }, |
2ef01793 | 235 | { "sa56004", sa56004 }, |
1daaceb2 | 236 | { "tmp451", tmp451 }, |
f8344f76 | 237 | { "tmp461", tmp461 }, |
9b0e8526 JD |
238 | { } |
239 | }; | |
240 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
241 | ||
787afaa3 | 242 | static const struct of_device_id __maybe_unused lm90_of_match[] = { |
df8d57bf JMC |
243 | { |
244 | .compatible = "adi,adm1032", | |
245 | .data = (void *)adm1032 | |
246 | }, | |
247 | { | |
248 | .compatible = "adi,adt7461", | |
249 | .data = (void *)adt7461 | |
250 | }, | |
251 | { | |
252 | .compatible = "adi,adt7461a", | |
253 | .data = (void *)adt7461 | |
254 | }, | |
255 | { | |
256 | .compatible = "gmt,g781", | |
257 | .data = (void *)g781 | |
258 | }, | |
259 | { | |
260 | .compatible = "national,lm90", | |
261 | .data = (void *)lm90 | |
262 | }, | |
263 | { | |
264 | .compatible = "national,lm86", | |
265 | .data = (void *)lm86 | |
266 | }, | |
267 | { | |
268 | .compatible = "national,lm89", | |
269 | .data = (void *)lm86 | |
270 | }, | |
271 | { | |
272 | .compatible = "national,lm99", | |
273 | .data = (void *)lm99 | |
274 | }, | |
275 | { | |
276 | .compatible = "dallas,max6646", | |
277 | .data = (void *)max6646 | |
278 | }, | |
279 | { | |
280 | .compatible = "dallas,max6647", | |
281 | .data = (void *)max6646 | |
282 | }, | |
283 | { | |
284 | .compatible = "dallas,max6649", | |
285 | .data = (void *)max6646 | |
286 | }, | |
229d495d JL |
287 | { |
288 | .compatible = "dallas,max6654", | |
289 | .data = (void *)max6654 | |
290 | }, | |
df8d57bf JMC |
291 | { |
292 | .compatible = "dallas,max6657", | |
293 | .data = (void *)max6657 | |
294 | }, | |
295 | { | |
296 | .compatible = "dallas,max6658", | |
297 | .data = (void *)max6657 | |
298 | }, | |
299 | { | |
300 | .compatible = "dallas,max6659", | |
301 | .data = (void *)max6659 | |
302 | }, | |
303 | { | |
304 | .compatible = "dallas,max6680", | |
305 | .data = (void *)max6680 | |
306 | }, | |
307 | { | |
308 | .compatible = "dallas,max6681", | |
309 | .data = (void *)max6680 | |
310 | }, | |
311 | { | |
312 | .compatible = "dallas,max6695", | |
313 | .data = (void *)max6696 | |
314 | }, | |
315 | { | |
316 | .compatible = "dallas,max6696", | |
317 | .data = (void *)max6696 | |
318 | }, | |
319 | { | |
320 | .compatible = "onnn,nct1008", | |
321 | .data = (void *)adt7461 | |
322 | }, | |
323 | { | |
324 | .compatible = "winbond,w83l771", | |
325 | .data = (void *)w83l771 | |
326 | }, | |
327 | { | |
328 | .compatible = "nxp,sa56004", | |
329 | .data = (void *)sa56004 | |
330 | }, | |
331 | { | |
332 | .compatible = "ti,tmp451", | |
333 | .data = (void *)tmp451 | |
334 | }, | |
f8344f76 GR |
335 | { |
336 | .compatible = "ti,tmp461", | |
337 | .data = (void *)tmp461 | |
338 | }, | |
df8d57bf JMC |
339 | { }, |
340 | }; | |
341 | MODULE_DEVICE_TABLE(of, lm90_of_match); | |
342 | ||
4667bcb8 GR |
343 | /* |
344 | * chip type specific parameters | |
345 | */ | |
346 | struct lm90_params { | |
347 | u32 flags; /* Capabilities */ | |
348 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
349 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 350 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 351 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
352 | }; |
353 | ||
354 | static const struct lm90_params lm90_params[] = { | |
355 | [adm1032] = { | |
1179324c GR |
356 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
357 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 358 | .alert_alarms = 0x7c, |
0c01b644 | 359 | .max_convrate = 10, |
4667bcb8 GR |
360 | }, |
361 | [adt7461] = { | |
1179324c | 362 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
f347e249 | 363 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP, |
4667bcb8 | 364 | .alert_alarms = 0x7c, |
0c01b644 | 365 | .max_convrate = 10, |
4667bcb8 | 366 | }, |
ae544f64 GR |
367 | [g781] = { |
368 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
369 | | LM90_HAVE_BROKEN_ALERT, | |
370 | .alert_alarms = 0x7c, | |
371 | .max_convrate = 8, | |
372 | }, | |
4667bcb8 GR |
373 | [lm86] = { |
374 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
375 | .alert_alarms = 0x7b, | |
0c01b644 | 376 | .max_convrate = 9, |
4667bcb8 GR |
377 | }, |
378 | [lm90] = { | |
379 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
380 | .alert_alarms = 0x7b, | |
0c01b644 | 381 | .max_convrate = 9, |
4667bcb8 GR |
382 | }, |
383 | [lm99] = { | |
384 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
385 | .alert_alarms = 0x7b, | |
0c01b644 | 386 | .max_convrate = 9, |
4667bcb8 GR |
387 | }, |
388 | [max6646] = { | |
4667bcb8 | 389 | .alert_alarms = 0x7c, |
0c01b644 | 390 | .max_convrate = 6, |
2ef01793 | 391 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 | 392 | }, |
229d495d JL |
393 | [max6654] = { |
394 | .alert_alarms = 0x7c, | |
395 | .max_convrate = 7, | |
396 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, | |
397 | }, | |
4667bcb8 | 398 | [max6657] = { |
62456189 | 399 | .flags = LM90_PAUSE_FOR_CONFIG, |
4667bcb8 | 400 | .alert_alarms = 0x7c, |
0c01b644 | 401 | .max_convrate = 8, |
2ef01793 | 402 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
403 | }, |
404 | [max6659] = { | |
a095f687 | 405 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 406 | .alert_alarms = 0x7c, |
0c01b644 | 407 | .max_convrate = 8, |
2ef01793 | 408 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
409 | }, |
410 | [max6680] = { | |
411 | .flags = LM90_HAVE_OFFSET, | |
412 | .alert_alarms = 0x7c, | |
0c01b644 | 413 | .max_convrate = 7, |
4667bcb8 GR |
414 | }, |
415 | [max6696] = { | |
a095f687 | 416 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 417 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 418 | .alert_alarms = 0x1c7c, |
0c01b644 | 419 | .max_convrate = 6, |
2ef01793 | 420 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
421 | }, |
422 | [w83l771] = { | |
423 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
424 | .alert_alarms = 0x7c, | |
0c01b644 | 425 | .max_convrate = 8, |
4667bcb8 | 426 | }, |
2ef01793 | 427 | [sa56004] = { |
a095f687 | 428 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
429 | .alert_alarms = 0x7b, |
430 | .max_convrate = 9, | |
431 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
432 | }, | |
1daaceb2 WN |
433 | [tmp451] = { |
434 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
f347e249 | 435 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP, |
1daaceb2 WN |
436 | .alert_alarms = 0x7c, |
437 | .max_convrate = 9, | |
438 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
eb1c8f43 | 439 | }, |
f8344f76 GR |
440 | [tmp461] = { |
441 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
442 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP, | |
443 | .alert_alarms = 0x7c, | |
444 | .max_convrate = 9, | |
445 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
446 | }, | |
4667bcb8 GR |
447 | }; |
448 | ||
40465d94 WN |
449 | /* |
450 | * TEMP8 register index | |
451 | */ | |
452 | enum lm90_temp8_reg_index { | |
453 | LOCAL_LOW = 0, | |
454 | LOCAL_HIGH, | |
455 | LOCAL_CRIT, | |
456 | REMOTE_CRIT, | |
457 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
458 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
459 | REMOTE2_CRIT, /* max6695/96 only */ | |
460 | REMOTE2_EMERG, /* max6695/96 only */ | |
461 | TEMP8_REG_NUM | |
462 | }; | |
463 | ||
464 | /* | |
465 | * TEMP11 register index | |
466 | */ | |
467 | enum lm90_temp11_reg_index { | |
468 | REMOTE_TEMP = 0, | |
469 | REMOTE_LOW, | |
470 | REMOTE_HIGH, | |
471 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
472 | LOCAL_TEMP, | |
473 | REMOTE2_TEMP, /* max6695/96 only */ | |
474 | REMOTE2_LOW, /* max6695/96 only */ | |
475 | REMOTE2_HIGH, /* max6695/96 only */ | |
476 | TEMP11_REG_NUM | |
477 | }; | |
478 | ||
1da177e4 LT |
479 | /* |
480 | * Client data (each client gets its own) | |
481 | */ | |
482 | ||
483 | struct lm90_data { | |
1de8b250 | 484 | struct i2c_client *client; |
94dbd23e | 485 | struct device *hwmon_dev; |
eb1c8f43 GR |
486 | u32 channel_config[4]; |
487 | struct hwmon_channel_info temp_info; | |
488 | const struct hwmon_channel_info *info[3]; | |
489 | struct hwmon_chip_info chip; | |
9a61bf63 | 490 | struct mutex update_lock; |
2f83ab77 | 491 | bool valid; /* true if register values are valid */ |
1da177e4 LT |
492 | unsigned long last_updated; /* in jiffies */ |
493 | int kind; | |
4667bcb8 | 494 | u32 flags; |
1da177e4 | 495 | |
38bab98a | 496 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 497 | |
b849e5d1 | 498 | u8 config; /* Current configuration register value */ |
95238364 | 499 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 500 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
501 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
502 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 503 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 504 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 505 | |
1da177e4 | 506 | /* registers values */ |
40465d94 WN |
507 | s8 temp8[TEMP8_REG_NUM]; |
508 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 509 | u8 temp_hyst; |
06e1c0a2 | 510 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
511 | }; |
512 | ||
15b66ab6 GR |
513 | /* |
514 | * Support functions | |
515 | */ | |
516 | ||
517 | /* | |
518 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
519 | * to explicitly ask for a transaction without PEC. | |
520 | */ | |
521 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
522 | { | |
523 | return i2c_smbus_xfer(client->adapter, client->addr, | |
524 | client->flags & ~I2C_CLIENT_PEC, | |
525 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
526 | } | |
527 | ||
528 | /* | |
529 | * It is assumed that client->update_lock is held (unless we are in | |
530 | * detection or initialization steps). This matters when PEC is enabled, | |
531 | * because we don't want the address pointer to change between the write | |
532 | * byte and the read byte transactions. | |
533 | */ | |
37ad04d7 | 534 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
535 | { |
536 | int err; | |
537 | ||
538 | if (client->flags & I2C_CLIENT_PEC) { | |
539 | err = adm1032_write_byte(client, reg); | |
540 | if (err >= 0) | |
541 | err = i2c_smbus_read_byte(client); | |
542 | } else | |
543 | err = i2c_smbus_read_byte_data(client, reg); | |
544 | ||
37ad04d7 | 545 | return err; |
15b66ab6 GR |
546 | } |
547 | ||
37ad04d7 | 548 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 549 | { |
37ad04d7 | 550 | int oldh, newh, l; |
15b66ab6 GR |
551 | |
552 | /* | |
553 | * There is a trick here. We have to read two registers to have the | |
554 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 555 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
556 | * the one-shot conversion register, which we don't want to do |
557 | * (disables hardware monitoring) or monitor the busy bit, which is | |
558 | * impossible (we can't read the values and monitor that bit at the | |
559 | * exact same time). So the solution used here is to read the high | |
560 | * byte once, then the low byte, then the high byte again. If the new | |
561 | * high byte matches the old one, then we have a valid reading. Else | |
562 | * we have to read the low byte again, and now we believe we have a | |
563 | * correct reading. | |
564 | */ | |
37ad04d7 GR |
565 | oldh = lm90_read_reg(client, regh); |
566 | if (oldh < 0) | |
567 | return oldh; | |
568 | l = lm90_read_reg(client, regl); | |
569 | if (l < 0) | |
570 | return l; | |
571 | newh = lm90_read_reg(client, regh); | |
572 | if (newh < 0) | |
573 | return newh; | |
15b66ab6 | 574 | if (oldh != newh) { |
37ad04d7 GR |
575 | l = lm90_read_reg(client, regl); |
576 | if (l < 0) | |
577 | return l; | |
15b66ab6 | 578 | } |
37ad04d7 | 579 | return (newh << 8) | l; |
15b66ab6 GR |
580 | } |
581 | ||
7a1d220c GR |
582 | static int lm90_update_confreg(struct lm90_data *data, u8 config) |
583 | { | |
584 | if (data->config != config) { | |
585 | int err; | |
586 | ||
587 | err = i2c_smbus_write_byte_data(data->client, | |
588 | LM90_REG_W_CONFIG1, | |
589 | config); | |
590 | if (err) | |
591 | return err; | |
592 | data->config = config; | |
593 | } | |
594 | return 0; | |
595 | } | |
596 | ||
15b66ab6 GR |
597 | /* |
598 | * client->update_lock must be held when calling this function (unless we are | |
599 | * in detection or initialization steps), and while a remote channel other | |
600 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
601 | * external channel 0 before releasing the lock. This is necessary because | |
602 | * various registers have different meanings as a result of selecting a | |
603 | * non-default remote channel. | |
604 | */ | |
7a1d220c | 605 | static int lm90_select_remote_channel(struct lm90_data *data, int channel) |
15b66ab6 | 606 | { |
7a1d220c GR |
607 | int err = 0; |
608 | ||
15b66ab6 | 609 | if (data->kind == max6696) { |
b849e5d1 | 610 | u8 config = data->config & ~0x08; |
b849e5d1 | 611 | |
15b66ab6 GR |
612 | if (channel) |
613 | config |= 0x08; | |
7a1d220c | 614 | err = lm90_update_confreg(data, config); |
15b66ab6 | 615 | } |
7a1d220c | 616 | return err; |
15b66ab6 GR |
617 | } |
618 | ||
7a1d220c | 619 | static int lm90_write_convrate(struct lm90_data *data, int val) |
62456189 | 620 | { |
b849e5d1 | 621 | u8 config = data->config; |
62456189 | 622 | int err; |
62456189 BY |
623 | |
624 | /* Save config and pause conversion */ | |
625 | if (data->flags & LM90_PAUSE_FOR_CONFIG) { | |
7a1d220c GR |
626 | err = lm90_update_confreg(data, config | 0x40); |
627 | if (err < 0) | |
628 | return err; | |
62456189 BY |
629 | } |
630 | ||
631 | /* Set conv rate */ | |
7a1d220c | 632 | err = i2c_smbus_write_byte_data(data->client, LM90_REG_W_CONVRATE, val); |
62456189 BY |
633 | |
634 | /* Revert change to config */ | |
7a1d220c | 635 | lm90_update_confreg(data, config); |
62456189 BY |
636 | |
637 | return err; | |
638 | } | |
639 | ||
0c01b644 GR |
640 | /* |
641 | * Set conversion rate. | |
642 | * client->update_lock must be held when calling this function (unless we are | |
643 | * in detection or initialization steps). | |
644 | */ | |
eb1c8f43 GR |
645 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
646 | unsigned int interval) | |
0c01b644 | 647 | { |
0c01b644 | 648 | unsigned int update_interval; |
eb1c8f43 | 649 | int i, err; |
0c01b644 GR |
650 | |
651 | /* Shift calculations to avoid rounding errors */ | |
652 | interval <<= 6; | |
653 | ||
654 | /* find the nearest update rate */ | |
655 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
656 | i < data->max_convrate; i++, update_interval >>= 1) | |
657 | if (interval >= update_interval * 3 / 4) | |
658 | break; | |
659 | ||
7a1d220c | 660 | err = lm90_write_convrate(data, i); |
0c01b644 | 661 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
eb1c8f43 | 662 | return err; |
0c01b644 GR |
663 | } |
664 | ||
10bfef47 GR |
665 | static int lm90_update_limits(struct device *dev) |
666 | { | |
667 | struct lm90_data *data = dev_get_drvdata(dev); | |
668 | struct i2c_client *client = data->client; | |
669 | int val; | |
670 | ||
671 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
672 | if (val < 0) | |
673 | return val; | |
674 | data->temp8[LOCAL_CRIT] = val; | |
675 | ||
676 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
677 | if (val < 0) | |
678 | return val; | |
679 | data->temp8[REMOTE_CRIT] = val; | |
680 | ||
681 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); | |
682 | if (val < 0) | |
683 | return val; | |
684 | data->temp_hyst = val; | |
685 | ||
be9d6374 | 686 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); |
10bfef47 GR |
687 | if (val < 0) |
688 | return val; | |
689 | data->temp11[REMOTE_LOW] = val << 8; | |
690 | ||
691 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
692 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
693 | if (val < 0) | |
694 | return val; | |
695 | data->temp11[REMOTE_LOW] |= val; | |
696 | } | |
697 | ||
698 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
699 | if (val < 0) | |
700 | return val; | |
701 | data->temp11[REMOTE_HIGH] = val << 8; | |
702 | ||
703 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
704 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
705 | if (val < 0) | |
706 | return val; | |
707 | data->temp11[REMOTE_HIGH] |= val; | |
708 | } | |
709 | ||
710 | if (data->flags & LM90_HAVE_OFFSET) { | |
711 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
712 | LM90_REG_R_REMOTE_OFFSL); | |
713 | if (val < 0) | |
714 | return val; | |
715 | data->temp11[REMOTE_OFFSET] = val; | |
716 | } | |
717 | ||
718 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
719 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
720 | if (val < 0) | |
721 | return val; | |
722 | data->temp8[LOCAL_EMERG] = val; | |
723 | ||
724 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
725 | if (val < 0) | |
726 | return val; | |
727 | data->temp8[REMOTE_EMERG] = val; | |
728 | } | |
729 | ||
730 | if (data->kind == max6696) { | |
7a1d220c | 731 | val = lm90_select_remote_channel(data, 1); |
10bfef47 GR |
732 | if (val < 0) |
733 | return val; | |
734 | ||
735 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
736 | if (val < 0) | |
737 | return val; | |
738 | data->temp8[REMOTE2_CRIT] = val; | |
739 | ||
740 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
741 | if (val < 0) | |
742 | return val; | |
743 | data->temp8[REMOTE2_EMERG] = val; | |
744 | ||
745 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
746 | if (val < 0) | |
747 | return val; | |
748 | data->temp11[REMOTE2_LOW] = val << 8; | |
749 | ||
750 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
751 | if (val < 0) | |
752 | return val; | |
753 | data->temp11[REMOTE2_HIGH] = val << 8; | |
754 | ||
7a1d220c | 755 | lm90_select_remote_channel(data, 0); |
10bfef47 GR |
756 | } |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
eb1c8f43 | 761 | static int lm90_update_device(struct device *dev) |
15b66ab6 | 762 | { |
1de8b250 GR |
763 | struct lm90_data *data = dev_get_drvdata(dev); |
764 | struct i2c_client *client = data->client; | |
0c01b644 | 765 | unsigned long next_update; |
eb1c8f43 | 766 | int val; |
15b66ab6 | 767 | |
10bfef47 GR |
768 | if (!data->valid) { |
769 | val = lm90_update_limits(dev); | |
770 | if (val < 0) | |
eb1c8f43 | 771 | return val; |
10bfef47 GR |
772 | } |
773 | ||
78c2c2fe JD |
774 | next_update = data->last_updated + |
775 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 776 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 777 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 778 | |
2f83ab77 | 779 | data->valid = false; |
10bfef47 | 780 | |
37ad04d7 GR |
781 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
782 | if (val < 0) | |
eb1c8f43 | 783 | return val; |
37ad04d7 GR |
784 | data->temp8[LOCAL_LOW] = val; |
785 | ||
786 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
787 | if (val < 0) | |
eb1c8f43 | 788 | return val; |
37ad04d7 GR |
789 | data->temp8[LOCAL_HIGH] = val; |
790 | ||
a095f687 | 791 | if (data->reg_local_ext) { |
37ad04d7 GR |
792 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
793 | data->reg_local_ext); | |
794 | if (val < 0) | |
eb1c8f43 | 795 | return val; |
37ad04d7 | 796 | data->temp11[LOCAL_TEMP] = val; |
15b66ab6 | 797 | } else { |
37ad04d7 GR |
798 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
799 | if (val < 0) | |
eb1c8f43 | 800 | return val; |
37ad04d7 | 801 | data->temp11[LOCAL_TEMP] = val << 8; |
15b66ab6 | 802 | } |
37ad04d7 GR |
803 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
804 | LM90_REG_R_REMOTE_TEMPL); | |
805 | if (val < 0) | |
eb1c8f43 | 806 | return val; |
37ad04d7 GR |
807 | data->temp11[REMOTE_TEMP] = val; |
808 | ||
37ad04d7 GR |
809 | val = lm90_read_reg(client, LM90_REG_R_STATUS); |
810 | if (val < 0) | |
eb1c8f43 | 811 | return val; |
37ad04d7 | 812 | data->alarms = val; /* lower 8 bit of alarms */ |
15b66ab6 GR |
813 | |
814 | if (data->kind == max6696) { | |
7a1d220c | 815 | val = lm90_select_remote_channel(data, 1); |
37ad04d7 | 816 | if (val < 0) |
eb1c8f43 | 817 | return val; |
37ad04d7 | 818 | |
37ad04d7 GR |
819 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
820 | LM90_REG_R_REMOTE_TEMPL); | |
eb1c8f43 | 821 | if (val < 0) { |
7a1d220c | 822 | lm90_select_remote_channel(data, 0); |
eb1c8f43 GR |
823 | return val; |
824 | } | |
37ad04d7 GR |
825 | data->temp11[REMOTE2_TEMP] = val; |
826 | ||
7a1d220c | 827 | lm90_select_remote_channel(data, 0); |
15b66ab6 | 828 | |
37ad04d7 GR |
829 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); |
830 | if (val < 0) | |
eb1c8f43 | 831 | return val; |
37ad04d7 | 832 | data->alarms |= val << 8; |
15b66ab6 GR |
833 | } |
834 | ||
f36ffeab GR |
835 | /* |
836 | * Re-enable ALERT# output if it was originally enabled and | |
837 | * relevant alarms are all clear | |
838 | */ | |
37ad04d7 GR |
839 | if (!(data->config_orig & 0x80) && |
840 | !(data->alarms & data->alert_alarms)) { | |
b849e5d1 | 841 | if (data->config & 0x80) { |
15b66ab6 | 842 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); |
7a1d220c | 843 | lm90_update_confreg(data, data->config & ~0x80); |
15b66ab6 GR |
844 | } |
845 | } | |
846 | ||
847 | data->last_updated = jiffies; | |
2f83ab77 | 848 | data->valid = true; |
15b66ab6 GR |
849 | } |
850 | ||
eb1c8f43 | 851 | return 0; |
15b66ab6 GR |
852 | } |
853 | ||
cea50fe2 NC |
854 | /* |
855 | * Conversions | |
856 | * For local temperatures and limits, critical limits and the hysteresis | |
857 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
858 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
859 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
860 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
861 | */ |
862 | ||
9d4d3834 | 863 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
864 | { |
865 | return val * 1000; | |
866 | } | |
867 | ||
271dabf5 BH |
868 | static inline int temp_from_u8(u8 val) |
869 | { | |
870 | return val * 1000; | |
871 | } | |
872 | ||
9d4d3834 | 873 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
874 | { |
875 | return val / 32 * 125; | |
876 | } | |
877 | ||
271dabf5 BH |
878 | static inline int temp_from_u16(u16 val) |
879 | { | |
880 | return val / 32 * 125; | |
881 | } | |
882 | ||
9d4d3834 | 883 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
884 | { |
885 | if (val <= -128000) | |
886 | return -128; | |
887 | if (val >= 127000) | |
888 | return 127; | |
889 | if (val < 0) | |
890 | return (val - 500) / 1000; | |
891 | return (val + 500) / 1000; | |
892 | } | |
893 | ||
271dabf5 BH |
894 | static u8 temp_to_u8(long val) |
895 | { | |
896 | if (val <= 0) | |
897 | return 0; | |
898 | if (val >= 255000) | |
899 | return 255; | |
900 | return (val + 500) / 1000; | |
901 | } | |
902 | ||
9d4d3834 | 903 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
904 | { |
905 | if (val <= -128000) | |
906 | return 0x8000; | |
907 | if (val >= 127875) | |
908 | return 0x7FE0; | |
909 | if (val < 0) | |
910 | return (val - 62) / 125 * 32; | |
911 | return (val + 62) / 125 * 32; | |
912 | } | |
913 | ||
914 | static u8 hyst_to_reg(long val) | |
915 | { | |
916 | if (val <= 0) | |
917 | return 0; | |
918 | if (val >= 30500) | |
919 | return 31; | |
920 | return (val + 500) / 1000; | |
921 | } | |
922 | ||
923 | /* | |
23b2d477 NC |
924 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
925 | * attempts to write values that are outside the range 0 < temp < 127 are | |
926 | * treated as the boundary value. | |
927 | * | |
928 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
929 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 930 | */ |
9d4d3834 | 931 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 932 | { |
23b2d477 NC |
933 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
934 | return (val - 64) * 1000; | |
589f707c | 935 | return temp_from_s8(val); |
cea50fe2 NC |
936 | } |
937 | ||
9d4d3834 | 938 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 939 | { |
23b2d477 NC |
940 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
941 | return (val - 0x4000) / 64 * 250; | |
589f707c | 942 | return temp_from_s16(val); |
23b2d477 NC |
943 | } |
944 | ||
9d4d3834 | 945 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
946 | { |
947 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
948 | if (val <= -64000) | |
949 | return 0; | |
950 | if (val >= 191000) | |
951 | return 0xFF; | |
952 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 953 | } |
589f707c GR |
954 | if (val <= 0) |
955 | return 0; | |
956 | if (val >= 127000) | |
957 | return 127; | |
958 | return (val + 500) / 1000; | |
23b2d477 NC |
959 | } |
960 | ||
9d4d3834 | 961 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
962 | { |
963 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
964 | if (val <= -64000) | |
965 | return 0; | |
966 | if (val >= 191750) | |
967 | return 0xFFC0; | |
968 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 969 | } |
589f707c GR |
970 | if (val <= 0) |
971 | return 0; | |
972 | if (val >= 127750) | |
973 | return 0x7FC0; | |
974 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
975 | } |
976 | ||
eb1c8f43 | 977 | /* pec used for ADM1032 only */ |
e57959a6 | 978 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
eb1c8f43 | 979 | char *buf) |
30d7394b | 980 | { |
eb1c8f43 | 981 | struct i2c_client *client = to_i2c_client(dev); |
97ae60bb | 982 | |
eb1c8f43 | 983 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
30d7394b JD |
984 | } |
985 | ||
e57959a6 JL |
986 | static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
987 | const char *buf, size_t count) | |
30d7394b | 988 | { |
eb1c8f43 | 989 | struct i2c_client *client = to_i2c_client(dev); |
11e57812 GR |
990 | long val; |
991 | int err; | |
992 | ||
179c4fdb | 993 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
994 | if (err < 0) |
995 | return err; | |
30d7394b | 996 | |
eb1c8f43 GR |
997 | switch (val) { |
998 | case 0: | |
999 | client->flags &= ~I2C_CLIENT_PEC; | |
1000 | break; | |
1001 | case 1: | |
1002 | client->flags |= I2C_CLIENT_PEC; | |
1003 | break; | |
1004 | default: | |
1005 | return -EINVAL; | |
1006 | } | |
06e1c0a2 | 1007 | |
30d7394b | 1008 | return count; |
1da177e4 | 1009 | } |
30d7394b | 1010 | |
e57959a6 | 1011 | static DEVICE_ATTR_RW(pec); |
eb1c8f43 GR |
1012 | |
1013 | static int lm90_get_temp11(struct lm90_data *data, int index) | |
30d7394b | 1014 | { |
eb1c8f43 | 1015 | s16 temp11 = data->temp11[index]; |
23b2d477 NC |
1016 | int temp; |
1017 | ||
f347e249 | 1018 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1019 | temp = temp_from_u16_adt7461(data, temp11); |
271dabf5 | 1020 | else if (data->kind == max6646) |
eb1c8f43 | 1021 | temp = temp_from_u16(temp11); |
23b2d477 | 1022 | else |
eb1c8f43 | 1023 | temp = temp_from_s16(temp11); |
23b2d477 | 1024 | |
97ae60bb | 1025 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1026 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
1027 | temp += 16000; |
1028 | ||
eb1c8f43 | 1029 | return temp; |
1da177e4 | 1030 | } |
30d7394b | 1031 | |
eb1c8f43 | 1032 | static int lm90_set_temp11(struct lm90_data *data, int index, long val) |
30d7394b | 1033 | { |
eb1c8f43 | 1034 | static struct reg { |
96512861 GR |
1035 | u8 high; |
1036 | u8 low; | |
eb1c8f43 GR |
1037 | } reg[] = { |
1038 | [REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1039 | [REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }, | |
1040 | [REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL }, | |
1041 | [REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1042 | [REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL } | |
30d7394b | 1043 | }; |
1de8b250 | 1044 | struct i2c_client *client = data->client; |
eb1c8f43 | 1045 | struct reg *regp = ®[index]; |
11e57812 GR |
1046 | int err; |
1047 | ||
97ae60bb | 1048 | /* +16 degrees offset for temp2 for the LM99 */ |
b50aa496 DO |
1049 | if (data->kind == lm99 && index <= 2) { |
1050 | /* prevent integer underflow */ | |
1051 | val = max(val, -128000l); | |
97ae60bb | 1052 | val -= 16000; |
b50aa496 | 1053 | } |
97ae60bb | 1054 | |
f347e249 | 1055 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
96512861 | 1056 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 1057 | else if (data->kind == max6646) |
96512861 | 1058 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 1059 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 1060 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 1061 | else |
96512861 | 1062 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 1063 | |
7a1d220c | 1064 | lm90_select_remote_channel(data, index >= 3); |
eb1c8f43 | 1065 | err = i2c_smbus_write_byte_data(client, regp->high, |
96512861 | 1066 | data->temp11[index] >> 8); |
eb1c8f43 GR |
1067 | if (err < 0) |
1068 | return err; | |
88073bb1 | 1069 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
eb1c8f43 GR |
1070 | err = i2c_smbus_write_byte_data(client, regp->low, |
1071 | data->temp11[index] & 0xff); | |
06e1c0a2 | 1072 | |
7a1d220c | 1073 | lm90_select_remote_channel(data, 0); |
eb1c8f43 | 1074 | return err; |
1da177e4 | 1075 | } |
30d7394b | 1076 | |
eb1c8f43 | 1077 | static int lm90_get_temp8(struct lm90_data *data, int index) |
30d7394b | 1078 | { |
eb1c8f43 | 1079 | s8 temp8 = data->temp8[index]; |
23b2d477 NC |
1080 | int temp; |
1081 | ||
f347e249 | 1082 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1083 | temp = temp_from_u8_adt7461(data, temp8); |
ec38fa2b | 1084 | else if (data->kind == max6646) |
eb1c8f43 | 1085 | temp = temp_from_u8(temp8); |
23b2d477 | 1086 | else |
eb1c8f43 | 1087 | temp = temp_from_s8(temp8); |
23b2d477 | 1088 | |
97ae60bb | 1089 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1090 | if (data->kind == lm99 && index == 3) |
97ae60bb JD |
1091 | temp += 16000; |
1092 | ||
eb1c8f43 | 1093 | return temp; |
1da177e4 | 1094 | } |
1da177e4 | 1095 | |
eb1c8f43 | 1096 | static int lm90_set_temp8(struct lm90_data *data, int index, long val) |
1da177e4 | 1097 | { |
eb1c8f43 GR |
1098 | static const u8 reg[TEMP8_REG_NUM] = { |
1099 | LM90_REG_W_LOCAL_LOW, | |
1100 | LM90_REG_W_LOCAL_HIGH, | |
1101 | LM90_REG_W_LOCAL_CRIT, | |
1102 | LM90_REG_W_REMOTE_CRIT, | |
1103 | MAX6659_REG_W_LOCAL_EMERG, | |
1104 | MAX6659_REG_W_REMOTE_EMERG, | |
1105 | LM90_REG_W_REMOTE_CRIT, | |
1106 | MAX6659_REG_W_REMOTE_EMERG, | |
1107 | }; | |
1de8b250 | 1108 | struct i2c_client *client = data->client; |
11e57812 | 1109 | int err; |
1da177e4 | 1110 | |
eb1c8f43 | 1111 | /* +16 degrees offset for temp2 for the LM99 */ |
b50aa496 DO |
1112 | if (data->kind == lm99 && index == 3) { |
1113 | /* prevent integer underflow */ | |
1114 | val = max(val, -128000l); | |
eb1c8f43 | 1115 | val -= 16000; |
b50aa496 | 1116 | } |
11e57812 | 1117 | |
f347e249 | 1118 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1119 | data->temp8[index] = temp_to_u8_adt7461(data, val); |
ec38fa2b | 1120 | else if (data->kind == max6646) |
eb1c8f43 | 1121 | data->temp8[index] = temp_to_u8(val); |
ec38fa2b | 1122 | else |
eb1c8f43 | 1123 | data->temp8[index] = temp_to_s8(val); |
ec38fa2b | 1124 | |
7a1d220c | 1125 | lm90_select_remote_channel(data, index >= 6); |
eb1c8f43 | 1126 | err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]); |
7a1d220c | 1127 | lm90_select_remote_channel(data, 0); |
37ad04d7 | 1128 | |
eb1c8f43 | 1129 | return err; |
1da177e4 LT |
1130 | } |
1131 | ||
eb1c8f43 | 1132 | static int lm90_get_temphyst(struct lm90_data *data, int index) |
2d45771e | 1133 | { |
eb1c8f43 | 1134 | int temp; |
37ad04d7 | 1135 | |
f347e249 | 1136 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 GR |
1137 | temp = temp_from_u8_adt7461(data, data->temp8[index]); |
1138 | else if (data->kind == max6646) | |
1139 | temp = temp_from_u8(data->temp8[index]); | |
1140 | else | |
1141 | temp = temp_from_s8(data->temp8[index]); | |
2d45771e | 1142 | |
eb1c8f43 GR |
1143 | /* +16 degrees offset for temp2 for the LM99 */ |
1144 | if (data->kind == lm99 && index == 3) | |
1145 | temp += 16000; | |
0c01b644 | 1146 | |
eb1c8f43 | 1147 | return temp - temp_from_s8(data->temp_hyst); |
0c01b644 GR |
1148 | } |
1149 | ||
eb1c8f43 | 1150 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
0c01b644 | 1151 | { |
1de8b250 | 1152 | struct i2c_client *client = data->client; |
eb1c8f43 | 1153 | int temp; |
0c01b644 GR |
1154 | int err; |
1155 | ||
f347e249 | 1156 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 GR |
1157 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); |
1158 | else if (data->kind == max6646) | |
1159 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); | |
1160 | else | |
1161 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); | |
0c01b644 | 1162 | |
b50aa496 DO |
1163 | /* prevent integer underflow */ |
1164 | val = max(val, -128000l); | |
1165 | ||
eb1c8f43 GR |
1166 | data->temp_hyst = hyst_to_reg(temp - val); |
1167 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, | |
1168 | data->temp_hyst); | |
1169 | return err; | |
0c01b644 GR |
1170 | } |
1171 | ||
eb1c8f43 GR |
1172 | static const u8 lm90_temp_index[3] = { |
1173 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP | |
0e39e01c JD |
1174 | }; |
1175 | ||
eb1c8f43 GR |
1176 | static const u8 lm90_temp_min_index[3] = { |
1177 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW | |
0e39e01c JD |
1178 | }; |
1179 | ||
eb1c8f43 GR |
1180 | static const u8 lm90_temp_max_index[3] = { |
1181 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH | |
742192f5 GR |
1182 | }; |
1183 | ||
eb1c8f43 GR |
1184 | static const u8 lm90_temp_crit_index[3] = { |
1185 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT | |
742192f5 GR |
1186 | }; |
1187 | ||
eb1c8f43 GR |
1188 | static const u8 lm90_temp_emerg_index[3] = { |
1189 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG | |
6948708d GR |
1190 | }; |
1191 | ||
eb1c8f43 | 1192 | static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; |
e9572fdd | 1193 | static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 }; |
eb1c8f43 GR |
1194 | static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; |
1195 | static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; | |
1196 | static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; | |
6948708d | 1197 | |
eb1c8f43 GR |
1198 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1199 | { | |
1200 | struct lm90_data *data = dev_get_drvdata(dev); | |
1201 | int err; | |
06e1c0a2 | 1202 | |
eb1c8f43 GR |
1203 | mutex_lock(&data->update_lock); |
1204 | err = lm90_update_device(dev); | |
1205 | mutex_unlock(&data->update_lock); | |
1206 | if (err) | |
1207 | return err; | |
06e1c0a2 | 1208 | |
eb1c8f43 GR |
1209 | switch (attr) { |
1210 | case hwmon_temp_input: | |
1211 | *val = lm90_get_temp11(data, lm90_temp_index[channel]); | |
1212 | break; | |
1213 | case hwmon_temp_min_alarm: | |
1214 | *val = (data->alarms >> lm90_min_alarm_bits[channel]) & 1; | |
1215 | break; | |
1216 | case hwmon_temp_max_alarm: | |
1217 | *val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1; | |
1218 | break; | |
1219 | case hwmon_temp_crit_alarm: | |
1220 | *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; | |
1221 | break; | |
1222 | case hwmon_temp_emergency_alarm: | |
1223 | *val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1; | |
1224 | break; | |
1225 | case hwmon_temp_fault: | |
1226 | *val = (data->alarms >> lm90_fault_bits[channel]) & 1; | |
1227 | break; | |
1228 | case hwmon_temp_min: | |
1229 | if (channel == 0) | |
1230 | *val = lm90_get_temp8(data, | |
1231 | lm90_temp_min_index[channel]); | |
1232 | else | |
1233 | *val = lm90_get_temp11(data, | |
1234 | lm90_temp_min_index[channel]); | |
1235 | break; | |
1236 | case hwmon_temp_max: | |
1237 | if (channel == 0) | |
1238 | *val = lm90_get_temp8(data, | |
1239 | lm90_temp_max_index[channel]); | |
1240 | else | |
1241 | *val = lm90_get_temp11(data, | |
1242 | lm90_temp_max_index[channel]); | |
1243 | break; | |
1244 | case hwmon_temp_crit: | |
1245 | *val = lm90_get_temp8(data, lm90_temp_crit_index[channel]); | |
1246 | break; | |
1247 | case hwmon_temp_crit_hyst: | |
1248 | *val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]); | |
1249 | break; | |
1250 | case hwmon_temp_emergency: | |
1251 | *val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]); | |
1252 | break; | |
1253 | case hwmon_temp_emergency_hyst: | |
1254 | *val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]); | |
1255 | break; | |
1256 | case hwmon_temp_offset: | |
1257 | *val = lm90_get_temp11(data, REMOTE_OFFSET); | |
1258 | break; | |
1259 | default: | |
1260 | return -EOPNOTSUPP; | |
1261 | } | |
1262 | return 0; | |
1263 | } | |
06e1c0a2 | 1264 | |
eb1c8f43 GR |
1265 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1266 | { | |
1267 | struct lm90_data *data = dev_get_drvdata(dev); | |
1268 | int err; | |
06e1c0a2 | 1269 | |
eb1c8f43 | 1270 | mutex_lock(&data->update_lock); |
06e1c0a2 | 1271 | |
eb1c8f43 GR |
1272 | err = lm90_update_device(dev); |
1273 | if (err) | |
1274 | goto error; | |
1275 | ||
1276 | switch (attr) { | |
1277 | case hwmon_temp_min: | |
1278 | if (channel == 0) | |
1279 | err = lm90_set_temp8(data, | |
1280 | lm90_temp_min_index[channel], | |
1281 | val); | |
1282 | else | |
1283 | err = lm90_set_temp11(data, | |
1284 | lm90_temp_min_index[channel], | |
1285 | val); | |
1286 | break; | |
1287 | case hwmon_temp_max: | |
1288 | if (channel == 0) | |
1289 | err = lm90_set_temp8(data, | |
1290 | lm90_temp_max_index[channel], | |
1291 | val); | |
1292 | else | |
1293 | err = lm90_set_temp11(data, | |
1294 | lm90_temp_max_index[channel], | |
1295 | val); | |
1296 | break; | |
1297 | case hwmon_temp_crit: | |
1298 | err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val); | |
1299 | break; | |
1300 | case hwmon_temp_crit_hyst: | |
1301 | err = lm90_set_temphyst(data, val); | |
1302 | break; | |
1303 | case hwmon_temp_emergency: | |
1304 | err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val); | |
1305 | break; | |
1306 | case hwmon_temp_offset: | |
1307 | err = lm90_set_temp11(data, REMOTE_OFFSET, val); | |
1308 | break; | |
1309 | default: | |
1310 | err = -EOPNOTSUPP; | |
1311 | break; | |
1312 | } | |
1313 | error: | |
1314 | mutex_unlock(&data->update_lock); | |
1315 | ||
1316 | return err; | |
1317 | } | |
1318 | ||
1319 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) | |
c3df5806 | 1320 | { |
eb1c8f43 GR |
1321 | switch (attr) { |
1322 | case hwmon_temp_input: | |
1323 | case hwmon_temp_min_alarm: | |
1324 | case hwmon_temp_max_alarm: | |
1325 | case hwmon_temp_crit_alarm: | |
1326 | case hwmon_temp_emergency_alarm: | |
1327 | case hwmon_temp_emergency_hyst: | |
1328 | case hwmon_temp_fault: | |
3334851d | 1329 | return 0444; |
eb1c8f43 GR |
1330 | case hwmon_temp_min: |
1331 | case hwmon_temp_max: | |
1332 | case hwmon_temp_crit: | |
1333 | case hwmon_temp_emergency: | |
1334 | case hwmon_temp_offset: | |
3334851d | 1335 | return 0644; |
eb1c8f43 GR |
1336 | case hwmon_temp_crit_hyst: |
1337 | if (channel == 0) | |
3334851d GR |
1338 | return 0644; |
1339 | return 0444; | |
eb1c8f43 GR |
1340 | default: |
1341 | return 0; | |
1342 | } | |
c3df5806 JD |
1343 | } |
1344 | ||
eb1c8f43 | 1345 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
c3df5806 | 1346 | { |
eb1c8f43 | 1347 | struct lm90_data *data = dev_get_drvdata(dev); |
11e57812 GR |
1348 | int err; |
1349 | ||
eb1c8f43 GR |
1350 | mutex_lock(&data->update_lock); |
1351 | err = lm90_update_device(dev); | |
1352 | mutex_unlock(&data->update_lock); | |
1353 | if (err) | |
11e57812 | 1354 | return err; |
c3df5806 | 1355 | |
eb1c8f43 GR |
1356 | switch (attr) { |
1357 | case hwmon_chip_update_interval: | |
1358 | *val = data->update_interval; | |
c3df5806 | 1359 | break; |
eb1c8f43 GR |
1360 | case hwmon_chip_alarms: |
1361 | *val = data->alarms; | |
c3df5806 JD |
1362 | break; |
1363 | default: | |
eb1c8f43 | 1364 | return -EOPNOTSUPP; |
c3df5806 JD |
1365 | } |
1366 | ||
eb1c8f43 | 1367 | return 0; |
c3df5806 JD |
1368 | } |
1369 | ||
eb1c8f43 GR |
1370 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1371 | { | |
1372 | struct lm90_data *data = dev_get_drvdata(dev); | |
1373 | struct i2c_client *client = data->client; | |
1374 | int err; | |
c3df5806 | 1375 | |
eb1c8f43 GR |
1376 | mutex_lock(&data->update_lock); |
1377 | ||
1378 | err = lm90_update_device(dev); | |
1379 | if (err) | |
1380 | goto error; | |
1381 | ||
1382 | switch (attr) { | |
1383 | case hwmon_chip_update_interval: | |
1384 | err = lm90_set_convrate(client, data, | |
1385 | clamp_val(val, 0, 100000)); | |
1386 | break; | |
1387 | default: | |
1388 | err = -EOPNOTSUPP; | |
1389 | break; | |
1390 | } | |
1391 | error: | |
1392 | mutex_unlock(&data->update_lock); | |
1393 | ||
1394 | return err; | |
1395 | } | |
1396 | ||
1397 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) | |
1398 | { | |
1399 | switch (attr) { | |
1400 | case hwmon_chip_update_interval: | |
3334851d | 1401 | return 0644; |
eb1c8f43 | 1402 | case hwmon_chip_alarms: |
3334851d | 1403 | return 0444; |
eb1c8f43 GR |
1404 | default: |
1405 | return 0; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, | |
1410 | u32 attr, int channel, long *val) | |
1411 | { | |
1412 | switch (type) { | |
1413 | case hwmon_chip: | |
1414 | return lm90_chip_read(dev, attr, channel, val); | |
1415 | case hwmon_temp: | |
1416 | return lm90_temp_read(dev, attr, channel, val); | |
1417 | default: | |
1418 | return -EOPNOTSUPP; | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, | |
1423 | u32 attr, int channel, long val) | |
1424 | { | |
1425 | switch (type) { | |
1426 | case hwmon_chip: | |
1427 | return lm90_chip_write(dev, attr, channel, val); | |
1428 | case hwmon_temp: | |
1429 | return lm90_temp_write(dev, attr, channel, val); | |
1430 | default: | |
1431 | return -EOPNOTSUPP; | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, | |
1436 | u32 attr, int channel) | |
1437 | { | |
1438 | switch (type) { | |
1439 | case hwmon_chip: | |
1440 | return lm90_chip_is_visible(data, attr, channel); | |
1441 | case hwmon_temp: | |
1442 | return lm90_temp_is_visible(data, attr, channel); | |
1443 | default: | |
1444 | return 0; | |
1445 | } | |
1446 | } | |
1da177e4 | 1447 | |
15b66ab6 | 1448 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1449 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1450 | struct i2c_board_info *info) |
8256fe0f | 1451 | { |
b2589ab0 JD |
1452 | struct i2c_adapter *adapter = client->adapter; |
1453 | int address = client->addr; | |
15b66ab6 | 1454 | const char *name = NULL; |
b2589ab0 | 1455 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1456 | |
15b66ab6 GR |
1457 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1458 | return -ENODEV; | |
1da177e4 | 1459 | |
8f2fa77c | 1460 | /* detection and identification */ |
b2589ab0 JD |
1461 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1462 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1463 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1464 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1465 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1466 | return -ENODEV; |
1467 | ||
f90be42f | 1468 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1469 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1470 | if (config2 < 0) | |
9b0e8526 | 1471 | return -ENODEV; |
f90be42f | 1472 | } else |
b2589ab0 | 1473 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1474 | |
f90be42f JD |
1475 | if ((address == 0x4C || address == 0x4D) |
1476 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1477 | if ((config1 & 0x2A) == 0x00 |
1478 | && (config2 & 0xF8) == 0x00 | |
1479 | && convrate <= 0x09) { | |
8f2fa77c JD |
1480 | if (address == 0x4C |
1481 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1482 | name = "lm90"; | |
32c82a93 | 1483 | } else |
8f2fa77c JD |
1484 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1485 | name = "lm99"; | |
1486 | dev_info(&adapter->dev, | |
1487 | "Assuming LM99 chip at 0x%02x\n", | |
1488 | address); | |
1489 | dev_info(&adapter->dev, | |
1490 | "If it is an LM89, instantiate it " | |
1491 | "with the new_device sysfs " | |
1492 | "interface\n"); | |
271dabf5 | 1493 | } else |
8f2fa77c JD |
1494 | if (address == 0x4C |
1495 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1496 | name = "lm86"; | |
1da177e4 LT |
1497 | } |
1498 | } | |
8f2fa77c JD |
1499 | } else |
1500 | if ((address == 0x4C || address == 0x4D) | |
1501 | && man_id == 0x41) { /* Analog Devices */ | |
1502 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1503 | && (config1 & 0x3F) == 0x00 |
1504 | && convrate <= 0x0A) { | |
8f2fa77c | 1505 | name = "adm1032"; |
f36ffeab GR |
1506 | /* |
1507 | * The ADM1032 supports PEC, but only if combined | |
1508 | * transactions are not used. | |
1509 | */ | |
8f2fa77c JD |
1510 | if (i2c_check_functionality(adapter, |
1511 | I2C_FUNC_SMBUS_BYTE)) | |
1512 | info->flags |= I2C_CLIENT_PEC; | |
1513 | } else | |
1514 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1515 | && (config1 & 0x1B) == 0x00 |
1516 | && convrate <= 0x0A) { | |
8f2fa77c | 1517 | name = "adt7461"; |
5a4e5e6a GR |
1518 | } else |
1519 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1520 | && (config1 & 0x1B) == 0x00 |
1521 | && convrate <= 0x0A) { | |
5a4e5e6a | 1522 | name = "adt7461a"; |
8f2fa77c JD |
1523 | } |
1524 | } else | |
1525 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1526 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1527 | |
1528 | /* | |
1529 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1530 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1531 | * exists, both readings will reflect the same value. Otherwise, | |
1532 | * the readings will be different. | |
1533 | */ | |
b2589ab0 JD |
1534 | emerg = i2c_smbus_read_byte_data(client, |
1535 | MAX6659_REG_R_REMOTE_EMERG); | |
1536 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1537 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1538 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1539 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1540 | status2 = i2c_smbus_read_byte_data(client, |
1541 | MAX6696_REG_R_STATUS2); | |
1542 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1543 | return -ENODEV; |
1544 | ||
8f2fa77c JD |
1545 | /* |
1546 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1547 | * register. Reading from that address will return the last | |
1548 | * read value, which in our case is those of the man_id | |
1549 | * register. Likewise, the config1 register seems to lack a | |
1550 | * low nibble, so the value will be those of the previous | |
1551 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1552 | * MAX6659 has a third set of upper temperature limit registers. |
1553 | * Those registers also return values on MAX6657 and MAX6658, | |
1554 | * thus the only way to detect MAX6659 is by its address. | |
1555 | * For this reason it will be mis-detected as MAX6657 if its | |
1556 | * address is 0x4C. | |
8f2fa77c JD |
1557 | */ |
1558 | if (chip_id == man_id | |
13c84951 | 1559 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1560 | && (config1 & 0x1F) == (man_id & 0x0F) |
1561 | && convrate <= 0x09) { | |
13c84951 GR |
1562 | if (address == 0x4C) |
1563 | name = "max6657"; | |
1564 | else | |
1565 | name = "max6659"; | |
8f2fa77c | 1566 | } else |
06e1c0a2 GR |
1567 | /* |
1568 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1569 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1570 | * register is unused and should return zero when read. Bit 0 of | |
1571 | * the status2 register is unused and should return zero when | |
1572 | * read. | |
1573 | * | |
1574 | * MAX6695 and MAX6696 have an additional set of temperature | |
1575 | * limit registers. We can detect those chips by checking if | |
1576 | * one of those registers exists. | |
1577 | */ | |
1578 | if (chip_id == 0x01 | |
b2589ab0 JD |
1579 | && (config1 & 0x10) == 0x00 |
1580 | && (status2 & 0x01) == 0x00 | |
1581 | && emerg == emerg2 | |
1582 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1583 | name = "max6696"; |
1584 | } else | |
8f2fa77c JD |
1585 | /* |
1586 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1587 | * revision of the chip. The lowest bit of the config1 register | |
1588 | * is unused and should return zero when read, so should the | |
1589 | * second to last bit of config1 (software reset). | |
1590 | */ | |
1591 | if (chip_id == 0x01 | |
b2589ab0 JD |
1592 | && (config1 & 0x03) == 0x00 |
1593 | && convrate <= 0x07) { | |
8f2fa77c JD |
1594 | name = "max6680"; |
1595 | } else | |
1596 | /* | |
1597 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1598 | * revision of the chip. The lowest 6 bits of the config1 | |
1599 | * register are unused and should return zero when read. | |
1600 | */ | |
1601 | if (chip_id == 0x59 | |
b2589ab0 JD |
1602 | && (config1 & 0x3f) == 0x00 |
1603 | && convrate <= 0x07) { | |
8f2fa77c | 1604 | name = "max6646"; |
229d495d JL |
1605 | } else |
1606 | /* | |
1607 | * The chip_id of the MAX6654 holds the revision of the chip. | |
1608 | * The lowest 3 bits of the config1 register are unused and | |
1609 | * should return zero when read. | |
1610 | */ | |
1611 | if (chip_id == 0x08 | |
1612 | && (config1 & 0x07) == 0x00 | |
1613 | && convrate <= 0x07) { | |
1614 | name = "max6654"; | |
1da177e4 | 1615 | } |
6771ea1f JD |
1616 | } else |
1617 | if (address == 0x4C | |
1618 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1619 | if ((config1 & 0x2A) == 0x00 |
1620 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1621 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1622 | && convrate <= 0x09) { |
c4f99a2b JD |
1623 | name = "w83l771"; |
1624 | } else | |
1625 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1626 | && convrate <= 0x08) { |
c4f99a2b JD |
1627 | name = "w83l771"; |
1628 | } | |
6771ea1f | 1629 | } |
2ef01793 | 1630 | } else |
6d101c58 JD |
1631 | if (address >= 0x48 && address <= 0x4F |
1632 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1633 | if (chip_id == 0x00 |
b2589ab0 JD |
1634 | && (config1 & 0x2A) == 0x00 |
1635 | && (config2 & 0xFE) == 0x00 | |
1636 | && convrate <= 0x09) { | |
2ef01793 SD |
1637 | name = "sa56004"; |
1638 | } | |
ae544f64 GR |
1639 | } else |
1640 | if ((address == 0x4C || address == 0x4D) | |
1641 | && man_id == 0x47) { /* GMT */ | |
1642 | if (chip_id == 0x01 /* G781 */ | |
1643 | && (config1 & 0x3F) == 0x00 | |
1644 | && convrate <= 0x08) | |
1645 | name = "g781"; | |
1daaceb2 | 1646 | } else |
f8344f76 GR |
1647 | if (man_id == 0x55 && chip_id == 0x00 && |
1648 | (config1 & 0x1B) == 0x00 && convrate <= 0x09) { | |
1649 | int local_ext, conalert, chen, dfc; | |
1daaceb2 WN |
1650 | |
1651 | local_ext = i2c_smbus_read_byte_data(client, | |
1652 | TMP451_REG_R_LOCAL_TEMPL); | |
f8344f76 GR |
1653 | conalert = i2c_smbus_read_byte_data(client, |
1654 | TMP451_REG_CONALERT); | |
1655 | chen = i2c_smbus_read_byte_data(client, TMP461_REG_CHEN); | |
1656 | dfc = i2c_smbus_read_byte_data(client, TMP461_REG_DFC); | |
1657 | ||
1658 | if ((local_ext & 0x0F) == 0x00 && | |
1659 | (conalert & 0xf1) == 0x01 && | |
1660 | (chen & 0xfc) == 0x00 && | |
1661 | (dfc & 0xfc) == 0x00) { | |
1662 | if (address == 0x4c && !(chen & 0x03)) | |
1663 | name = "tmp451"; | |
1664 | else if (address >= 0x48 && address <= 0x4f) | |
1665 | name = "tmp461"; | |
1666 | } | |
1da177e4 LT |
1667 | } |
1668 | ||
8f2fa77c JD |
1669 | if (!name) { /* identification failed */ |
1670 | dev_dbg(&adapter->dev, | |
1671 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1672 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1673 | return -ENODEV; | |
1da177e4 | 1674 | } |
8f2fa77c | 1675 | |
9b0e8526 JD |
1676 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1677 | ||
1678 | return 0; | |
1679 | } | |
1680 | ||
1f17a444 | 1681 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1682 | { |
1f17a444 GR |
1683 | struct lm90_data *data = _data; |
1684 | struct i2c_client *client = data->client; | |
1685 | ||
f7001bb0 | 1686 | /* Restore initial configuration */ |
7a1d220c | 1687 | lm90_write_convrate(data, data->convrate_orig); |
f7001bb0 GR |
1688 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, |
1689 | data->config_orig); | |
1690 | } | |
1691 | ||
37ad04d7 | 1692 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1693 | { |
37ad04d7 | 1694 | int config, convrate; |
15b66ab6 | 1695 | |
37ad04d7 GR |
1696 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1697 | if (convrate < 0) | |
1698 | return convrate; | |
0c01b644 GR |
1699 | data->convrate_orig = convrate; |
1700 | ||
15b66ab6 GR |
1701 | /* |
1702 | * Start the conversions. | |
1703 | */ | |
37ad04d7 GR |
1704 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1705 | if (config < 0) | |
1706 | return config; | |
15b66ab6 | 1707 | data->config_orig = config; |
b849e5d1 | 1708 | data->config = config; |
15b66ab6 | 1709 | |
62456189 BY |
1710 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
1711 | ||
15b66ab6 | 1712 | /* Check Temperature Range Select */ |
f347e249 | 1713 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) { |
15b66ab6 GR |
1714 | if (config & 0x04) |
1715 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1720 | * 0.125 degree resolution) and range (0x08, extend range | |
1721 | * to -64 degree) mode for the remote temperature sensor. | |
1722 | */ | |
1723 | if (data->kind == max6680) | |
1724 | config |= 0x18; | |
1725 | ||
229d495d JL |
1726 | /* |
1727 | * Put MAX6654 into extended range (0x20, extend minimum range from | |
1728 | * 0 degrees to -64 degrees). Note that extended resolution is not | |
1729 | * possible on the MAX6654 unless conversion rate is set to 1 Hz or | |
1730 | * slower, which is intentionally not done by default. | |
1731 | */ | |
1732 | if (data->kind == max6654) | |
1733 | config |= 0x20; | |
1734 | ||
15b66ab6 GR |
1735 | /* |
1736 | * Select external channel 0 for max6695/96 | |
1737 | */ | |
1738 | if (data->kind == max6696) | |
1739 | config &= ~0x08; | |
1740 | ||
2abdc357 DO |
1741 | /* |
1742 | * Interrupt is enabled by default on reset, but it may be disabled | |
1743 | * by bootloader, unmask it. | |
1744 | */ | |
1745 | if (client->irq) | |
1746 | config &= ~0x80; | |
1747 | ||
15b66ab6 | 1748 | config &= 0xBF; /* run */ |
7a1d220c | 1749 | lm90_update_confreg(data, config); |
1f17a444 | 1750 | |
c5fcf01b | 1751 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
15b66ab6 GR |
1752 | } |
1753 | ||
072de496 WN |
1754 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1755 | { | |
1756 | struct lm90_data *data = i2c_get_clientdata(client); | |
37ad04d7 | 1757 | int st, st2 = 0; |
072de496 | 1758 | |
37ad04d7 GR |
1759 | st = lm90_read_reg(client, LM90_REG_R_STATUS); |
1760 | if (st < 0) | |
1761 | return false; | |
072de496 | 1762 | |
37ad04d7 GR |
1763 | if (data->kind == max6696) { |
1764 | st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
1765 | if (st2 < 0) | |
1766 | return false; | |
1767 | } | |
072de496 WN |
1768 | |
1769 | *status = st | (st2 << 8); | |
1770 | ||
1771 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1772 | return false; | |
1773 | ||
1774 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1775 | (st2 & MAX6696_STATUS2_LOT2)) | |
94dbd23e DO |
1776 | dev_dbg(&client->dev, |
1777 | "temp%d out of range, please check!\n", 1); | |
072de496 WN |
1778 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || |
1779 | (st2 & MAX6696_STATUS2_ROT2)) | |
94dbd23e DO |
1780 | dev_dbg(&client->dev, |
1781 | "temp%d out of range, please check!\n", 2); | |
072de496 | 1782 | if (st & LM90_STATUS_ROPEN) |
94dbd23e DO |
1783 | dev_dbg(&client->dev, |
1784 | "temp%d diode open, please check!\n", 2); | |
072de496 WN |
1785 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | |
1786 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
94dbd23e DO |
1787 | dev_dbg(&client->dev, |
1788 | "temp%d out of range, please check!\n", 3); | |
072de496 | 1789 | if (st2 & MAX6696_STATUS2_R2OPEN) |
94dbd23e DO |
1790 | dev_dbg(&client->dev, |
1791 | "temp%d diode open, please check!\n", 3); | |
1792 | ||
1793 | if (st & LM90_STATUS_LLOW) | |
1794 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1795 | hwmon_temp_min, 0); | |
1796 | if (st & LM90_STATUS_RLOW) | |
1797 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1798 | hwmon_temp_min, 1); | |
1799 | if (st2 & MAX6696_STATUS2_R2LOW) | |
1800 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1801 | hwmon_temp_min, 2); | |
1802 | if (st & LM90_STATUS_LHIGH) | |
1803 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1804 | hwmon_temp_max, 0); | |
1805 | if (st & LM90_STATUS_RHIGH) | |
1806 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1807 | hwmon_temp_max, 1); | |
1808 | if (st2 & MAX6696_STATUS2_R2HIGH) | |
1809 | hwmon_notify_event(data->hwmon_dev, hwmon_temp, | |
1810 | hwmon_temp_max, 2); | |
072de496 WN |
1811 | |
1812 | return true; | |
1813 | } | |
1814 | ||
109b1283 WN |
1815 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1816 | { | |
1817 | struct i2c_client *client = dev_id; | |
1818 | u16 status; | |
1819 | ||
1820 | if (lm90_is_tripped(client, &status)) | |
1821 | return IRQ_HANDLED; | |
1822 | else | |
1823 | return IRQ_NONE; | |
1824 | } | |
1825 | ||
1f17a444 GR |
1826 | static void lm90_remove_pec(void *dev) |
1827 | { | |
1828 | device_remove_file(dev, &dev_attr_pec); | |
1829 | } | |
1830 | ||
1831 | static void lm90_regulator_disable(void *regulator) | |
1832 | { | |
1833 | regulator_disable(regulator); | |
1834 | } | |
1835 | ||
eb1c8f43 GR |
1836 | |
1837 | static const struct hwmon_ops lm90_ops = { | |
1838 | .is_visible = lm90_is_visible, | |
1839 | .read = lm90_read, | |
1840 | .write = lm90_write, | |
1841 | }; | |
1842 | ||
67487038 | 1843 | static int lm90_probe(struct i2c_client *client) |
9b0e8526 | 1844 | { |
b2589ab0 | 1845 | struct device *dev = &client->dev; |
e67776cc | 1846 | struct i2c_adapter *adapter = client->adapter; |
eb1c8f43 | 1847 | struct hwmon_channel_info *info; |
3e0f964f | 1848 | struct regulator *regulator; |
6e5f62b9 | 1849 | struct device *hwmon_dev; |
eb1c8f43 | 1850 | struct lm90_data *data; |
9b0e8526 | 1851 | int err; |
1da177e4 | 1852 | |
3e0f964f WN |
1853 | regulator = devm_regulator_get(dev, "vcc"); |
1854 | if (IS_ERR(regulator)) | |
1855 | return PTR_ERR(regulator); | |
1856 | ||
1857 | err = regulator_enable(regulator); | |
1858 | if (err < 0) { | |
d89fa686 | 1859 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1860 | return err; |
1861 | } | |
1862 | ||
c5fcf01b GR |
1863 | err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator); |
1864 | if (err) | |
1865 | return err; | |
1f17a444 | 1866 | |
d89fa686 | 1867 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1868 | if (!data) |
1869 | return -ENOMEM; | |
1870 | ||
1de8b250 | 1871 | data->client = client; |
b2589ab0 | 1872 | i2c_set_clientdata(client, data); |
9a61bf63 | 1873 | mutex_init(&data->update_lock); |
1da177e4 | 1874 | |
9b0e8526 | 1875 | /* Set the device type */ |
df8d57bf JMC |
1876 | if (client->dev.of_node) |
1877 | data->kind = (enum chips)of_device_get_match_data(&client->dev); | |
1878 | else | |
67487038 | 1879 | data->kind = i2c_match_id(lm90_id, client)->driver_data; |
9b0e8526 JD |
1880 | if (data->kind == adm1032) { |
1881 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1882 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1883 | } |
1da177e4 | 1884 | |
f36ffeab GR |
1885 | /* |
1886 | * Different devices have different alarm bits triggering the | |
1887 | * ALERT# output | |
1888 | */ | |
4667bcb8 | 1889 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1890 | |
88073bb1 | 1891 | /* Set chip capabilities */ |
4667bcb8 | 1892 | data->flags = lm90_params[data->kind].flags; |
eb1c8f43 GR |
1893 | |
1894 | data->chip.ops = &lm90_ops; | |
1895 | data->chip.info = data->info; | |
1896 | ||
a4d41e67 GR |
1897 | data->info[0] = HWMON_CHANNEL_INFO(chip, |
1898 | HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS); | |
eb1c8f43 GR |
1899 | data->info[1] = &data->temp_info; |
1900 | ||
1901 | info = &data->temp_info; | |
1902 | info->type = hwmon_temp; | |
1903 | info->config = data->channel_config; | |
1904 | ||
1905 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1906 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1907 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM; | |
1908 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1909 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1910 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; | |
1911 | ||
1912 | if (data->flags & LM90_HAVE_OFFSET) | |
1913 | data->channel_config[1] |= HWMON_T_OFFSET; | |
1914 | ||
1915 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
1916 | data->channel_config[0] |= HWMON_T_EMERGENCY | | |
1917 | HWMON_T_EMERGENCY_HYST; | |
1918 | data->channel_config[1] |= HWMON_T_EMERGENCY | | |
1919 | HWMON_T_EMERGENCY_HYST; | |
1920 | } | |
1921 | ||
1922 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { | |
1923 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; | |
1924 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; | |
1925 | } | |
1926 | ||
1927 | if (data->flags & LM90_HAVE_TEMP3) { | |
1928 | data->channel_config[2] = HWMON_T_INPUT | | |
1929 | HWMON_T_MIN | HWMON_T_MAX | | |
1930 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | | |
1931 | HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST | | |
1932 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | | |
1933 | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM | | |
1934 | HWMON_T_FAULT; | |
1935 | } | |
1936 | ||
a095f687 | 1937 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1938 | |
0c01b644 GR |
1939 | /* Set maximum conversion rate */ |
1940 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1941 | ||
1da177e4 | 1942 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
1943 | err = lm90_init_client(client, data); |
1944 | if (err < 0) { | |
1945 | dev_err(dev, "Failed to initialize device\n"); | |
1946 | return err; | |
1947 | } | |
1da177e4 | 1948 | |
eb1c8f43 GR |
1949 | /* |
1950 | * The 'pec' attribute is attached to the i2c device and thus created | |
1951 | * separately. | |
1952 | */ | |
b2589ab0 JD |
1953 | if (client->flags & I2C_CLIENT_PEC) { |
1954 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1955 | if (err) |
1f17a444 | 1956 | return err; |
c5fcf01b GR |
1957 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
1958 | if (err) | |
1959 | return err; | |
06e1c0a2 | 1960 | } |
0e39e01c | 1961 | |
eb1c8f43 GR |
1962 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
1963 | data, &data->chip, | |
1964 | NULL); | |
6e5f62b9 GR |
1965 | if (IS_ERR(hwmon_dev)) |
1966 | return PTR_ERR(hwmon_dev); | |
943b0830 | 1967 | |
94dbd23e DO |
1968 | data->hwmon_dev = hwmon_dev; |
1969 | ||
109b1283 WN |
1970 | if (client->irq) { |
1971 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1972 | err = devm_request_threaded_irq(dev, client->irq, | |
1973 | NULL, lm90_irq_thread, | |
d97fb837 | 1974 | IRQF_ONESHOT, "lm90", client); |
109b1283 WN |
1975 | if (err < 0) { |
1976 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 1977 | return err; |
109b1283 WN |
1978 | } |
1979 | } | |
1980 | ||
1da177e4 LT |
1981 | return 0; |
1982 | } | |
1983 | ||
b4f21054 BT |
1984 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
1985 | unsigned int flag) | |
53de3342 | 1986 | { |
072de496 | 1987 | u16 alarms; |
06e1c0a2 | 1988 | |
b4f21054 BT |
1989 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
1990 | return; | |
1991 | ||
072de496 | 1992 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1993 | /* |
1994 | * Disable ALERT# output, because these chips don't implement | |
1995 | * SMBus alert correctly; they should only hold the alert line | |
1996 | * low briefly. | |
1997 | */ | |
072de496 WN |
1998 | struct lm90_data *data = i2c_get_clientdata(client); |
1999 | ||
37ad04d7 GR |
2000 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
2001 | (alarms & data->alert_alarms)) { | |
53de3342 | 2002 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
7a1d220c | 2003 | lm90_update_confreg(data, data->config | 0x80); |
53de3342 | 2004 | } |
072de496 | 2005 | } else { |
94dbd23e | 2006 | dev_dbg(&client->dev, "Everything OK\n"); |
53de3342 JD |
2007 | } |
2008 | } | |
2009 | ||
4c7f85a3 DO |
2010 | static int __maybe_unused lm90_suspend(struct device *dev) |
2011 | { | |
2012 | struct lm90_data *data = dev_get_drvdata(dev); | |
2013 | struct i2c_client *client = data->client; | |
2014 | ||
2015 | if (client->irq) | |
2016 | disable_irq(client->irq); | |
2017 | ||
2018 | return 0; | |
2019 | } | |
2020 | ||
2021 | static int __maybe_unused lm90_resume(struct device *dev) | |
2022 | { | |
2023 | struct lm90_data *data = dev_get_drvdata(dev); | |
2024 | struct i2c_client *client = data->client; | |
2025 | ||
2026 | if (client->irq) | |
2027 | enable_irq(client->irq); | |
2028 | ||
2029 | return 0; | |
2030 | } | |
2031 | ||
2032 | static SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume); | |
2033 | ||
15b66ab6 GR |
2034 | static struct i2c_driver lm90_driver = { |
2035 | .class = I2C_CLASS_HWMON, | |
2036 | .driver = { | |
2037 | .name = "lm90", | |
df8d57bf | 2038 | .of_match_table = of_match_ptr(lm90_of_match), |
4c7f85a3 | 2039 | .pm = &lm90_pm_ops, |
15b66ab6 | 2040 | }, |
67487038 | 2041 | .probe_new = lm90_probe, |
15b66ab6 GR |
2042 | .alert = lm90_alert, |
2043 | .id_table = lm90_id, | |
2044 | .detect = lm90_detect, | |
2045 | .address_list = normal_i2c, | |
2046 | }; | |
1da177e4 | 2047 | |
f0967eea | 2048 | module_i2c_driver(lm90_driver); |
1da177e4 | 2049 | |
7c81c60f | 2050 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
2051 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
2052 | MODULE_LICENSE("GPL"); |