]>
Commit | Line | Data |
---|---|---|
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 | * |
16ba51b5 GR |
38 | * This driver also supports the MAX6654 chip made by Maxim. This chip can be |
39 | * at 9 different addresses, similar to MAX6680/MAX6681. The MAX6654 is similar | |
40 | * to MAX6657/MAX6658/MAX6659, but does not support critical temperature | |
41 | * limits. Extended range is available by setting the configuration register | |
42 | * accordingly, and is done during initialization. Extended precision is only | |
43 | * available at conversion rates of 1 Hz and slower. Note that extended | |
44 | * precision is not enabled by default, as this driver initializes all chips | |
45 | * to 2 Hz by design. | |
229d495d | 46 | * |
1a51e068 DW |
47 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
48 | * MAX6692 chips made by Maxim. These are again similar to the LM86, | |
49 | * but they use unsigned temperature values and can report temperatures | |
50 | * from 0 to 145 degrees. | |
271dabf5 | 51 | * |
32c82a93 RB |
52 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
53 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
54 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
55 | * be treated identically. | |
32c82a93 | 56 | * |
06e1c0a2 GR |
57 | * This driver also supports the MAX6695 and MAX6696, two other sensor |
58 | * chips made by Maxim. These are also quite similar to other Maxim | |
59 | * chips, but support three temperature sensors instead of two. MAX6695 | |
60 | * and MAX6696 only differ in the pinout so they can be treated identically. | |
61 | * | |
5a4e5e6a GR |
62 | * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as |
63 | * NCT1008 from ON Semiconductor. The chips are supported in both compatibility | |
64 | * and extended mode. They are mostly compatible with LM90 except for a data | |
65 | * format difference for the temperature value registers. | |
1da177e4 | 66 | * |
2ef01793 SD |
67 | * This driver also supports the SA56004 from Philips. This device is |
68 | * pin-compatible with the LM86, the ED/EDP parts are also address-compatible. | |
69 | * | |
ae544f64 GR |
70 | * This driver also supports the G781 from GMT. This device is compatible |
71 | * with the ADM1032. | |
72 | * | |
f8344f76 GR |
73 | * This driver also supports TMP451 and TMP461 from Texas Instruments. |
74 | * Those devices are supported in both compatibility and extended mode. | |
75 | * They are mostly compatible with ADT7461 except for local temperature | |
76 | * low byte register and max conversion rate. | |
1daaceb2 | 77 | * |
1da177e4 LT |
78 | * Since the LM90 was the first chipset supported by this driver, most |
79 | * comments will refer to this chipset, but are actually general and | |
80 | * concern all supported chipsets, unless mentioned otherwise. | |
1da177e4 LT |
81 | */ |
82 | ||
1da177e4 LT |
83 | #include <linux/module.h> |
84 | #include <linux/init.h> | |
85 | #include <linux/slab.h> | |
86 | #include <linux/jiffies.h> | |
87 | #include <linux/i2c.h> | |
943b0830 MH |
88 | #include <linux/hwmon.h> |
89 | #include <linux/err.h> | |
9a61bf63 | 90 | #include <linux/mutex.h> |
df8d57bf | 91 | #include <linux/of_device.h> |
0e39e01c | 92 | #include <linux/sysfs.h> |
109b1283 | 93 | #include <linux/interrupt.h> |
3e0f964f | 94 | #include <linux/regulator/consumer.h> |
f6d07751 | 95 | #include <linux/workqueue.h> |
1da177e4 LT |
96 | |
97 | /* | |
98 | * Addresses to scan | |
99 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 100 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
101 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
102 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
103 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
104 | * have address 0x4d. | |
271dabf5 | 105 | * MAX6647 has address 0x4e. |
13c84951 | 106 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
229d495d JL |
107 | * MAX6654, MAX6680, and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, |
108 | * 0x2a, 0x2b, 0x4c, 0x4d or 0x4e. | |
2ef01793 | 109 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
110 | */ |
111 | ||
25e9c86d | 112 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
113 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
114 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 115 | |
13c84951 | 116 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
f8344f76 | 117 | max6646, w83l771, max6696, sa56004, g781, tmp451, tmp461, max6654 }; |
1da177e4 LT |
118 | |
119 | /* | |
120 | * The LM90 registers | |
121 | */ | |
122 | ||
123 | #define LM90_REG_R_MAN_ID 0xFE | |
124 | #define LM90_REG_R_CHIP_ID 0xFF | |
125 | #define LM90_REG_R_CONFIG1 0x03 | |
126 | #define LM90_REG_W_CONFIG1 0x09 | |
127 | #define LM90_REG_R_CONFIG2 0xBF | |
128 | #define LM90_REG_W_CONFIG2 0xBF | |
129 | #define LM90_REG_R_CONVRATE 0x04 | |
130 | #define LM90_REG_W_CONVRATE 0x0A | |
131 | #define LM90_REG_R_STATUS 0x02 | |
132 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
133 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
134 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
135 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
136 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
137 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
138 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
139 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
140 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
141 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
142 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
143 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
144 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
145 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
146 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
147 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
148 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
149 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
150 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
151 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
152 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
153 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
154 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
155 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
156 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
157 | ||
229d495d | 158 | /* MAX6646/6647/6649/6654/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
159 | |
160 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 161 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
162 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
163 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
164 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
165 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 166 | |
2ef01793 SD |
167 | /* SA56004 registers */ |
168 | ||
169 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
170 | ||
0c01b644 GR |
171 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
172 | ||
f8344f76 | 173 | /* TMP451/TMP461 registers */ |
1daaceb2 | 174 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 |
f8344f76 GR |
175 | #define TMP451_REG_CONALERT 0x22 |
176 | ||
177 | #define TMP461_REG_CHEN 0x16 | |
178 | #define TMP461_REG_DFC 0x24 | |
1daaceb2 | 179 | |
23b2d477 NC |
180 | /* |
181 | * Device flags | |
182 | */ | |
88073bb1 GR |
183 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
184 | /* Device features */ | |
185 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 186 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 187 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
188 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
189 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 190 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
f347e249 GR |
191 | #define LM90_HAVE_EXTENDED_TEMP (1 << 8) /* extended temperature support*/ |
192 | #define LM90_PAUSE_FOR_CONFIG (1 << 9) /* Pause conversion for config */ | |
16ba51b5 | 193 | #define LM90_HAVE_CRIT (1 << 10)/* Chip supports CRIT/OVERT register */ |
da7dc056 | 194 | #define LM90_HAVE_CRIT_ALRM_SWP (1 << 11)/* critical alarm bits swapped */ |
23b2d477 | 195 | |
072de496 WN |
196 | /* LM90 status */ |
197 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
198 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
199 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
200 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
201 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
202 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
203 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
cdc5287a | 204 | #define LM90_STATUS_BUSY (1 << 7) /* conversion is ongoing */ |
072de496 WN |
205 | |
206 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
207 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
208 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
209 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
210 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
211 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
212 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
213 | ||
1da177e4 LT |
214 | /* |
215 | * Driver data (common to all clients) | |
216 | */ | |
217 | ||
9b0e8526 JD |
218 | static const struct i2c_device_id lm90_id[] = { |
219 | { "adm1032", adm1032 }, | |
220 | { "adt7461", adt7461 }, | |
5a4e5e6a | 221 | { "adt7461a", adt7461 }, |
ae544f64 | 222 | { "g781", g781 }, |
9b0e8526 JD |
223 | { "lm90", lm90 }, |
224 | { "lm86", lm86 }, | |
97ae60bb JD |
225 | { "lm89", lm86 }, |
226 | { "lm99", lm99 }, | |
271dabf5 BH |
227 | { "max6646", max6646 }, |
228 | { "max6647", max6646 }, | |
229 | { "max6649", max6646 }, | |
229d495d | 230 | { "max6654", max6654 }, |
9b0e8526 JD |
231 | { "max6657", max6657 }, |
232 | { "max6658", max6657 }, | |
13c84951 | 233 | { "max6659", max6659 }, |
9b0e8526 JD |
234 | { "max6680", max6680 }, |
235 | { "max6681", max6680 }, | |
06e1c0a2 GR |
236 | { "max6695", max6696 }, |
237 | { "max6696", max6696 }, | |
5a4e5e6a | 238 | { "nct1008", adt7461 }, |
6771ea1f | 239 | { "w83l771", w83l771 }, |
2ef01793 | 240 | { "sa56004", sa56004 }, |
1daaceb2 | 241 | { "tmp451", tmp451 }, |
f8344f76 | 242 | { "tmp461", tmp461 }, |
9b0e8526 JD |
243 | { } |
244 | }; | |
245 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
246 | ||
787afaa3 | 247 | static const struct of_device_id __maybe_unused lm90_of_match[] = { |
df8d57bf JMC |
248 | { |
249 | .compatible = "adi,adm1032", | |
250 | .data = (void *)adm1032 | |
251 | }, | |
252 | { | |
253 | .compatible = "adi,adt7461", | |
254 | .data = (void *)adt7461 | |
255 | }, | |
256 | { | |
257 | .compatible = "adi,adt7461a", | |
258 | .data = (void *)adt7461 | |
259 | }, | |
260 | { | |
261 | .compatible = "gmt,g781", | |
262 | .data = (void *)g781 | |
263 | }, | |
264 | { | |
265 | .compatible = "national,lm90", | |
266 | .data = (void *)lm90 | |
267 | }, | |
268 | { | |
269 | .compatible = "national,lm86", | |
270 | .data = (void *)lm86 | |
271 | }, | |
272 | { | |
273 | .compatible = "national,lm89", | |
274 | .data = (void *)lm86 | |
275 | }, | |
276 | { | |
277 | .compatible = "national,lm99", | |
278 | .data = (void *)lm99 | |
279 | }, | |
280 | { | |
281 | .compatible = "dallas,max6646", | |
282 | .data = (void *)max6646 | |
283 | }, | |
284 | { | |
285 | .compatible = "dallas,max6647", | |
286 | .data = (void *)max6646 | |
287 | }, | |
288 | { | |
289 | .compatible = "dallas,max6649", | |
290 | .data = (void *)max6646 | |
291 | }, | |
229d495d JL |
292 | { |
293 | .compatible = "dallas,max6654", | |
294 | .data = (void *)max6654 | |
295 | }, | |
df8d57bf JMC |
296 | { |
297 | .compatible = "dallas,max6657", | |
298 | .data = (void *)max6657 | |
299 | }, | |
300 | { | |
301 | .compatible = "dallas,max6658", | |
302 | .data = (void *)max6657 | |
303 | }, | |
304 | { | |
305 | .compatible = "dallas,max6659", | |
306 | .data = (void *)max6659 | |
307 | }, | |
308 | { | |
309 | .compatible = "dallas,max6680", | |
310 | .data = (void *)max6680 | |
311 | }, | |
312 | { | |
313 | .compatible = "dallas,max6681", | |
314 | .data = (void *)max6680 | |
315 | }, | |
316 | { | |
317 | .compatible = "dallas,max6695", | |
318 | .data = (void *)max6696 | |
319 | }, | |
320 | { | |
321 | .compatible = "dallas,max6696", | |
322 | .data = (void *)max6696 | |
323 | }, | |
324 | { | |
325 | .compatible = "onnn,nct1008", | |
326 | .data = (void *)adt7461 | |
327 | }, | |
328 | { | |
329 | .compatible = "winbond,w83l771", | |
330 | .data = (void *)w83l771 | |
331 | }, | |
332 | { | |
333 | .compatible = "nxp,sa56004", | |
334 | .data = (void *)sa56004 | |
335 | }, | |
336 | { | |
337 | .compatible = "ti,tmp451", | |
338 | .data = (void *)tmp451 | |
339 | }, | |
f8344f76 GR |
340 | { |
341 | .compatible = "ti,tmp461", | |
342 | .data = (void *)tmp461 | |
343 | }, | |
df8d57bf JMC |
344 | { }, |
345 | }; | |
346 | MODULE_DEVICE_TABLE(of, lm90_of_match); | |
347 | ||
4667bcb8 GR |
348 | /* |
349 | * chip type specific parameters | |
350 | */ | |
351 | struct lm90_params { | |
352 | u32 flags; /* Capabilities */ | |
353 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
354 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 355 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 356 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
357 | }; |
358 | ||
359 | static const struct lm90_params lm90_params[] = { | |
360 | [adm1032] = { | |
1179324c | 361 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
16ba51b5 | 362 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT, |
4667bcb8 | 363 | .alert_alarms = 0x7c, |
0c01b644 | 364 | .max_convrate = 10, |
4667bcb8 GR |
365 | }, |
366 | [adt7461] = { | |
1179324c | 367 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
16ba51b5 GR |
368 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP |
369 | | LM90_HAVE_CRIT, | |
4667bcb8 | 370 | .alert_alarms = 0x7c, |
0c01b644 | 371 | .max_convrate = 10, |
4667bcb8 | 372 | }, |
ae544f64 GR |
373 | [g781] = { |
374 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
16ba51b5 | 375 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT, |
ae544f64 | 376 | .alert_alarms = 0x7c, |
a66c5ed5 | 377 | .max_convrate = 7, |
ae544f64 | 378 | }, |
4667bcb8 | 379 | [lm86] = { |
16ba51b5 GR |
380 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
381 | | LM90_HAVE_CRIT, | |
4667bcb8 | 382 | .alert_alarms = 0x7b, |
0c01b644 | 383 | .max_convrate = 9, |
4667bcb8 GR |
384 | }, |
385 | [lm90] = { | |
16ba51b5 GR |
386 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
387 | | LM90_HAVE_CRIT, | |
4667bcb8 | 388 | .alert_alarms = 0x7b, |
0c01b644 | 389 | .max_convrate = 9, |
4667bcb8 GR |
390 | }, |
391 | [lm99] = { | |
16ba51b5 GR |
392 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
393 | | LM90_HAVE_CRIT, | |
4667bcb8 | 394 | .alert_alarms = 0x7b, |
0c01b644 | 395 | .max_convrate = 9, |
4667bcb8 GR |
396 | }, |
397 | [max6646] = { | |
f614629f | 398 | .flags = LM90_HAVE_CRIT | LM90_HAVE_BROKEN_ALERT, |
4667bcb8 | 399 | .alert_alarms = 0x7c, |
0c01b644 | 400 | .max_convrate = 6, |
2ef01793 | 401 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 | 402 | }, |
229d495d | 403 | [max6654] = { |
a53fff96 | 404 | .flags = LM90_HAVE_BROKEN_ALERT, |
229d495d JL |
405 | .alert_alarms = 0x7c, |
406 | .max_convrate = 7, | |
407 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, | |
408 | }, | |
4667bcb8 | 409 | [max6657] = { |
16ba51b5 | 410 | .flags = LM90_PAUSE_FOR_CONFIG | LM90_HAVE_CRIT, |
4667bcb8 | 411 | .alert_alarms = 0x7c, |
0c01b644 | 412 | .max_convrate = 8, |
2ef01793 | 413 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
414 | }, |
415 | [max6659] = { | |
16ba51b5 | 416 | .flags = LM90_HAVE_EMERGENCY | LM90_HAVE_CRIT, |
4667bcb8 | 417 | .alert_alarms = 0x7c, |
0c01b644 | 418 | .max_convrate = 8, |
2ef01793 | 419 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
420 | }, |
421 | [max6680] = { | |
da7dc056 | 422 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT |
94746b0b | 423 | | LM90_HAVE_CRIT_ALRM_SWP | LM90_HAVE_BROKEN_ALERT, |
4667bcb8 | 424 | .alert_alarms = 0x7c, |
0c01b644 | 425 | .max_convrate = 7, |
4667bcb8 GR |
426 | }, |
427 | [max6696] = { | |
a095f687 | 428 | .flags = LM90_HAVE_EMERGENCY |
16ba51b5 | 429 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT, |
e41fae2b | 430 | .alert_alarms = 0x1c7c, |
0c01b644 | 431 | .max_convrate = 6, |
2ef01793 | 432 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
433 | }, |
434 | [w83l771] = { | |
16ba51b5 | 435 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT, |
4667bcb8 | 436 | .alert_alarms = 0x7c, |
0c01b644 | 437 | .max_convrate = 8, |
4667bcb8 | 438 | }, |
2ef01793 | 439 | [sa56004] = { |
16ba51b5 | 440 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT, |
2ef01793 SD |
441 | .alert_alarms = 0x7b, |
442 | .max_convrate = 9, | |
443 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
444 | }, | |
1daaceb2 WN |
445 | [tmp451] = { |
446 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
16ba51b5 | 447 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT, |
1daaceb2 WN |
448 | .alert_alarms = 0x7c, |
449 | .max_convrate = 9, | |
450 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
eb1c8f43 | 451 | }, |
f8344f76 GR |
452 | [tmp461] = { |
453 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
16ba51b5 | 454 | | LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT, |
f8344f76 GR |
455 | .alert_alarms = 0x7c, |
456 | .max_convrate = 9, | |
457 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
458 | }, | |
4667bcb8 GR |
459 | }; |
460 | ||
40465d94 WN |
461 | /* |
462 | * TEMP8 register index | |
463 | */ | |
464 | enum lm90_temp8_reg_index { | |
465 | LOCAL_LOW = 0, | |
466 | LOCAL_HIGH, | |
467 | LOCAL_CRIT, | |
468 | REMOTE_CRIT, | |
469 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
470 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
471 | REMOTE2_CRIT, /* max6695/96 only */ | |
472 | REMOTE2_EMERG, /* max6695/96 only */ | |
473 | TEMP8_REG_NUM | |
474 | }; | |
475 | ||
476 | /* | |
477 | * TEMP11 register index | |
478 | */ | |
479 | enum lm90_temp11_reg_index { | |
480 | REMOTE_TEMP = 0, | |
481 | REMOTE_LOW, | |
482 | REMOTE_HIGH, | |
483 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
484 | LOCAL_TEMP, | |
485 | REMOTE2_TEMP, /* max6695/96 only */ | |
486 | REMOTE2_LOW, /* max6695/96 only */ | |
487 | REMOTE2_HIGH, /* max6695/96 only */ | |
488 | TEMP11_REG_NUM | |
489 | }; | |
490 | ||
1da177e4 LT |
491 | /* |
492 | * Client data (each client gets its own) | |
493 | */ | |
494 | ||
495 | struct lm90_data { | |
1de8b250 | 496 | struct i2c_client *client; |
94dbd23e | 497 | struct device *hwmon_dev; |
eb1c8f43 GR |
498 | u32 channel_config[4]; |
499 | struct hwmon_channel_info temp_info; | |
500 | const struct hwmon_channel_info *info[3]; | |
501 | struct hwmon_chip_info chip; | |
9a61bf63 | 502 | struct mutex update_lock; |
f6d07751 | 503 | struct delayed_work alert_work; |
2f83ab77 | 504 | bool valid; /* true if register values are valid */ |
f6d07751 | 505 | bool alarms_valid; /* true if status register values are valid */ |
1da177e4 | 506 | unsigned long last_updated; /* in jiffies */ |
f6d07751 | 507 | unsigned long alarms_updated; /* in jiffies */ |
1da177e4 | 508 | int kind; |
4667bcb8 | 509 | u32 flags; |
1da177e4 | 510 | |
38bab98a | 511 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 512 | |
b849e5d1 | 513 | u8 config; /* Current configuration register value */ |
95238364 | 514 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 515 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
516 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
517 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 518 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 519 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 520 | |
1da177e4 | 521 | /* registers values */ |
40465d94 WN |
522 | s8 temp8[TEMP8_REG_NUM]; |
523 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 524 | u8 temp_hyst; |
f6d07751 GR |
525 | u16 reported_alarms; /* alarms reported as sysfs/udev events */ |
526 | u16 current_alarms; /* current alarms, reported by chip */ | |
527 | u16 alarms; /* alarms not yet reported to user */ | |
1da177e4 LT |
528 | }; |
529 | ||
15b66ab6 GR |
530 | /* |
531 | * Support functions | |
532 | */ | |
533 | ||
534 | /* | |
535 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
536 | * to explicitly ask for a transaction without PEC. | |
537 | */ | |
538 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
539 | { | |
540 | return i2c_smbus_xfer(client->adapter, client->addr, | |
541 | client->flags & ~I2C_CLIENT_PEC, | |
542 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
543 | } | |
544 | ||
545 | /* | |
546 | * It is assumed that client->update_lock is held (unless we are in | |
547 | * detection or initialization steps). This matters when PEC is enabled, | |
548 | * because we don't want the address pointer to change between the write | |
549 | * byte and the read byte transactions. | |
550 | */ | |
37ad04d7 | 551 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
552 | { |
553 | int err; | |
554 | ||
555 | if (client->flags & I2C_CLIENT_PEC) { | |
556 | err = adm1032_write_byte(client, reg); | |
557 | if (err >= 0) | |
558 | err = i2c_smbus_read_byte(client); | |
559 | } else | |
560 | err = i2c_smbus_read_byte_data(client, reg); | |
561 | ||
37ad04d7 | 562 | return err; |
15b66ab6 GR |
563 | } |
564 | ||
37ad04d7 | 565 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 566 | { |
37ad04d7 | 567 | int oldh, newh, l; |
15b66ab6 GR |
568 | |
569 | /* | |
570 | * There is a trick here. We have to read two registers to have the | |
571 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 572 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
573 | * the one-shot conversion register, which we don't want to do |
574 | * (disables hardware monitoring) or monitor the busy bit, which is | |
575 | * impossible (we can't read the values and monitor that bit at the | |
576 | * exact same time). So the solution used here is to read the high | |
577 | * byte once, then the low byte, then the high byte again. If the new | |
578 | * high byte matches the old one, then we have a valid reading. Else | |
579 | * we have to read the low byte again, and now we believe we have a | |
580 | * correct reading. | |
581 | */ | |
37ad04d7 GR |
582 | oldh = lm90_read_reg(client, regh); |
583 | if (oldh < 0) | |
584 | return oldh; | |
585 | l = lm90_read_reg(client, regl); | |
586 | if (l < 0) | |
587 | return l; | |
588 | newh = lm90_read_reg(client, regh); | |
589 | if (newh < 0) | |
590 | return newh; | |
15b66ab6 | 591 | if (oldh != newh) { |
37ad04d7 GR |
592 | l = lm90_read_reg(client, regl); |
593 | if (l < 0) | |
594 | return l; | |
15b66ab6 | 595 | } |
37ad04d7 | 596 | return (newh << 8) | l; |
15b66ab6 GR |
597 | } |
598 | ||
7a1d220c GR |
599 | static int lm90_update_confreg(struct lm90_data *data, u8 config) |
600 | { | |
601 | if (data->config != config) { | |
602 | int err; | |
603 | ||
604 | err = i2c_smbus_write_byte_data(data->client, | |
605 | LM90_REG_W_CONFIG1, | |
606 | config); | |
607 | if (err) | |
608 | return err; | |
609 | data->config = config; | |
610 | } | |
611 | return 0; | |
612 | } | |
613 | ||
15b66ab6 GR |
614 | /* |
615 | * client->update_lock must be held when calling this function (unless we are | |
616 | * in detection or initialization steps), and while a remote channel other | |
617 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
618 | * external channel 0 before releasing the lock. This is necessary because | |
619 | * various registers have different meanings as a result of selecting a | |
620 | * non-default remote channel. | |
621 | */ | |
7a1d220c | 622 | static int lm90_select_remote_channel(struct lm90_data *data, int channel) |
15b66ab6 | 623 | { |
7a1d220c GR |
624 | int err = 0; |
625 | ||
15b66ab6 | 626 | if (data->kind == max6696) { |
b849e5d1 | 627 | u8 config = data->config & ~0x08; |
b849e5d1 | 628 | |
15b66ab6 GR |
629 | if (channel) |
630 | config |= 0x08; | |
7a1d220c | 631 | err = lm90_update_confreg(data, config); |
15b66ab6 | 632 | } |
7a1d220c | 633 | return err; |
15b66ab6 GR |
634 | } |
635 | ||
7a1d220c | 636 | static int lm90_write_convrate(struct lm90_data *data, int val) |
62456189 | 637 | { |
b849e5d1 | 638 | u8 config = data->config; |
62456189 | 639 | int err; |
62456189 BY |
640 | |
641 | /* Save config and pause conversion */ | |
642 | if (data->flags & LM90_PAUSE_FOR_CONFIG) { | |
7a1d220c GR |
643 | err = lm90_update_confreg(data, config | 0x40); |
644 | if (err < 0) | |
645 | return err; | |
62456189 BY |
646 | } |
647 | ||
648 | /* Set conv rate */ | |
7a1d220c | 649 | err = i2c_smbus_write_byte_data(data->client, LM90_REG_W_CONVRATE, val); |
62456189 BY |
650 | |
651 | /* Revert change to config */ | |
7a1d220c | 652 | lm90_update_confreg(data, config); |
62456189 BY |
653 | |
654 | return err; | |
655 | } | |
656 | ||
0c01b644 GR |
657 | /* |
658 | * Set conversion rate. | |
659 | * client->update_lock must be held when calling this function (unless we are | |
660 | * in detection or initialization steps). | |
661 | */ | |
eb1c8f43 GR |
662 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
663 | unsigned int interval) | |
0c01b644 | 664 | { |
0c01b644 | 665 | unsigned int update_interval; |
eb1c8f43 | 666 | int i, err; |
0c01b644 GR |
667 | |
668 | /* Shift calculations to avoid rounding errors */ | |
669 | interval <<= 6; | |
670 | ||
671 | /* find the nearest update rate */ | |
672 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
673 | i < data->max_convrate; i++, update_interval >>= 1) | |
674 | if (interval >= update_interval * 3 / 4) | |
675 | break; | |
676 | ||
7a1d220c | 677 | err = lm90_write_convrate(data, i); |
0c01b644 | 678 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
eb1c8f43 | 679 | return err; |
0c01b644 GR |
680 | } |
681 | ||
10bfef47 GR |
682 | static int lm90_update_limits(struct device *dev) |
683 | { | |
684 | struct lm90_data *data = dev_get_drvdata(dev); | |
685 | struct i2c_client *client = data->client; | |
686 | int val; | |
687 | ||
16ba51b5 GR |
688 | if (data->flags & LM90_HAVE_CRIT) { |
689 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
690 | if (val < 0) | |
691 | return val; | |
692 | data->temp8[LOCAL_CRIT] = val; | |
10bfef47 | 693 | |
16ba51b5 GR |
694 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); |
695 | if (val < 0) | |
696 | return val; | |
697 | data->temp8[REMOTE_CRIT] = val; | |
10bfef47 | 698 | |
16ba51b5 GR |
699 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); |
700 | if (val < 0) | |
701 | return val; | |
702 | data->temp_hyst = val; | |
703 | } | |
10bfef47 | 704 | |
be9d6374 | 705 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); |
10bfef47 GR |
706 | if (val < 0) |
707 | return val; | |
708 | data->temp11[REMOTE_LOW] = val << 8; | |
709 | ||
710 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
711 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
712 | if (val < 0) | |
713 | return val; | |
714 | data->temp11[REMOTE_LOW] |= val; | |
715 | } | |
716 | ||
717 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
718 | if (val < 0) | |
719 | return val; | |
720 | data->temp11[REMOTE_HIGH] = val << 8; | |
721 | ||
722 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
723 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
724 | if (val < 0) | |
725 | return val; | |
726 | data->temp11[REMOTE_HIGH] |= val; | |
727 | } | |
728 | ||
729 | if (data->flags & LM90_HAVE_OFFSET) { | |
730 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
731 | LM90_REG_R_REMOTE_OFFSL); | |
732 | if (val < 0) | |
733 | return val; | |
734 | data->temp11[REMOTE_OFFSET] = val; | |
735 | } | |
736 | ||
737 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
738 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
739 | if (val < 0) | |
740 | return val; | |
741 | data->temp8[LOCAL_EMERG] = val; | |
742 | ||
743 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
744 | if (val < 0) | |
745 | return val; | |
746 | data->temp8[REMOTE_EMERG] = val; | |
747 | } | |
748 | ||
749 | if (data->kind == max6696) { | |
7a1d220c | 750 | val = lm90_select_remote_channel(data, 1); |
10bfef47 GR |
751 | if (val < 0) |
752 | return val; | |
753 | ||
754 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
755 | if (val < 0) | |
756 | return val; | |
757 | data->temp8[REMOTE2_CRIT] = val; | |
758 | ||
759 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
760 | if (val < 0) | |
761 | return val; | |
762 | data->temp8[REMOTE2_EMERG] = val; | |
763 | ||
764 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
765 | if (val < 0) | |
766 | return val; | |
767 | data->temp11[REMOTE2_LOW] = val << 8; | |
768 | ||
769 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
770 | if (val < 0) | |
771 | return val; | |
772 | data->temp11[REMOTE2_HIGH] = val << 8; | |
773 | ||
7a1d220c | 774 | lm90_select_remote_channel(data, 0); |
10bfef47 GR |
775 | } |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
f6d07751 GR |
780 | static void lm90_report_alarms(struct device *dev, struct lm90_data *data) |
781 | { | |
782 | u16 cleared_alarms = data->reported_alarms & ~data->current_alarms; | |
783 | u16 new_alarms = data->current_alarms & ~data->reported_alarms; | |
784 | struct device *hwmon_dev = data->hwmon_dev; | |
785 | int st, st2; | |
786 | ||
787 | if (!cleared_alarms && !new_alarms) | |
788 | return; | |
789 | ||
790 | st = new_alarms & 0xff; | |
791 | st2 = new_alarms >> 8; | |
792 | ||
793 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
794 | (st2 & MAX6696_STATUS2_LOT2)) | |
795 | dev_dbg(dev, "temp%d out of range, please check!\n", 1); | |
796 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
797 | (st2 & MAX6696_STATUS2_ROT2)) | |
798 | dev_dbg(dev, "temp%d out of range, please check!\n", 2); | |
799 | if (st & LM90_STATUS_ROPEN) | |
800 | dev_dbg(dev, "temp%d diode open, please check!\n", 2); | |
801 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
802 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
803 | dev_dbg(dev, "temp%d out of range, please check!\n", 3); | |
804 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
805 | dev_dbg(dev, "temp%d diode open, please check!\n", 3); | |
806 | ||
807 | st |= cleared_alarms & 0xff; | |
808 | st2 |= cleared_alarms >> 8; | |
809 | ||
810 | if (st & LM90_STATUS_LLOW) | |
811 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 0); | |
812 | if (st & LM90_STATUS_RLOW) | |
813 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 1); | |
814 | if (st2 & MAX6696_STATUS2_R2LOW) | |
815 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_min_alarm, 2); | |
816 | ||
817 | if (st & LM90_STATUS_LHIGH) | |
818 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 0); | |
819 | if (st & LM90_STATUS_RHIGH) | |
820 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 1); | |
821 | if (st2 & MAX6696_STATUS2_R2HIGH) | |
822 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 2); | |
823 | ||
824 | if (st & LM90_STATUS_LTHRM) | |
825 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 0); | |
826 | if (st & LM90_STATUS_RTHRM) | |
827 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 1); | |
828 | if (st2 & MAX6696_STATUS2_R2THRM) | |
829 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 2); | |
830 | ||
831 | if (st2 & MAX6696_STATUS2_LOT2) | |
832 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 0); | |
833 | if (st2 & MAX6696_STATUS2_ROT2) | |
834 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 1); | |
835 | if (st2 & MAX6696_STATUS2_R2OT2) | |
836 | hwmon_notify_event(hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 2); | |
837 | ||
838 | data->reported_alarms = data->current_alarms; | |
839 | } | |
840 | ||
841 | static int lm90_update_alarms_locked(struct lm90_data *data, bool force) | |
842 | { | |
843 | if (force || !data->alarms_valid || | |
844 | time_after(jiffies, data->alarms_updated + msecs_to_jiffies(data->update_interval))) { | |
845 | struct i2c_client *client = data->client; | |
846 | bool check_enable; | |
847 | u16 alarms; | |
848 | int val; | |
849 | ||
850 | data->alarms_valid = false; | |
851 | ||
852 | val = lm90_read_reg(client, LM90_REG_R_STATUS); | |
853 | if (val < 0) | |
854 | return val; | |
855 | alarms = val & ~LM90_STATUS_BUSY; | |
856 | ||
857 | if (data->kind == max6696) { | |
858 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
859 | if (val < 0) | |
860 | return val; | |
861 | alarms |= val << 8; | |
862 | } | |
863 | /* | |
864 | * If the update is forced (called from interrupt or alert | |
865 | * handler) and alarm data is valid, the alarms may have been | |
866 | * updated after the last update interval, and the status | |
867 | * register may still be cleared. Only add additional alarms | |
868 | * in this case. Alarms will be cleared later if appropriate. | |
869 | */ | |
870 | if (force && data->alarms_valid) | |
871 | data->current_alarms |= alarms; | |
872 | else | |
873 | data->current_alarms = alarms; | |
874 | data->alarms |= alarms; | |
875 | ||
876 | check_enable = (client->irq || !(data->config_orig & 0x80)) && | |
877 | (data->config & 0x80); | |
878 | ||
879 | if (force || check_enable) | |
880 | lm90_report_alarms(&client->dev, data); | |
881 | ||
882 | /* | |
883 | * Re-enable ALERT# output if it was originally enabled, relevant | |
884 | * alarms are all clear, and alerts are currently disabled. | |
885 | * Otherwise (re)schedule worker if needed. | |
886 | */ | |
887 | if (check_enable) { | |
888 | if (!(data->current_alarms & data->alert_alarms)) { | |
889 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); | |
890 | lm90_update_confreg(data, data->config & ~0x80); | |
891 | /* | |
892 | * We may have been called from the update handler. | |
893 | * If so, the worker, if scheduled, is no longer | |
894 | * needed. Cancel it. Don't synchronize because | |
895 | * it may already be running. | |
896 | */ | |
897 | cancel_delayed_work(&data->alert_work); | |
898 | } else { | |
899 | schedule_delayed_work(&data->alert_work, | |
900 | max_t(int, HZ, msecs_to_jiffies(data->update_interval))); | |
901 | } | |
902 | } | |
903 | data->alarms_updated = jiffies; | |
904 | data->alarms_valid = true; | |
905 | } | |
906 | return 0; | |
907 | } | |
908 | ||
909 | static int lm90_update_alarms(struct lm90_data *data, bool force) | |
910 | { | |
911 | int err; | |
912 | ||
913 | mutex_lock(&data->update_lock); | |
914 | err = lm90_update_alarms_locked(data, force); | |
915 | mutex_unlock(&data->update_lock); | |
916 | ||
917 | return err; | |
918 | } | |
919 | ||
920 | static void lm90_alert_work(struct work_struct *__work) | |
921 | { | |
922 | struct delayed_work *delayed_work = container_of(__work, struct delayed_work, work); | |
923 | struct lm90_data *data = container_of(delayed_work, struct lm90_data, alert_work); | |
924 | ||
925 | /* Nothing to do if alerts are enabled */ | |
926 | if (!(data->config & 0x80)) | |
927 | return; | |
928 | ||
929 | lm90_update_alarms(data, true); | |
930 | } | |
931 | ||
eb1c8f43 | 932 | static int lm90_update_device(struct device *dev) |
15b66ab6 | 933 | { |
1de8b250 GR |
934 | struct lm90_data *data = dev_get_drvdata(dev); |
935 | struct i2c_client *client = data->client; | |
0c01b644 | 936 | unsigned long next_update; |
eb1c8f43 | 937 | int val; |
15b66ab6 | 938 | |
10bfef47 GR |
939 | if (!data->valid) { |
940 | val = lm90_update_limits(dev); | |
941 | if (val < 0) | |
eb1c8f43 | 942 | return val; |
10bfef47 GR |
943 | } |
944 | ||
78c2c2fe JD |
945 | next_update = data->last_updated + |
946 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 947 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 948 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 949 | |
2f83ab77 | 950 | data->valid = false; |
10bfef47 | 951 | |
37ad04d7 GR |
952 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
953 | if (val < 0) | |
eb1c8f43 | 954 | return val; |
37ad04d7 GR |
955 | data->temp8[LOCAL_LOW] = val; |
956 | ||
957 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
958 | if (val < 0) | |
eb1c8f43 | 959 | return val; |
37ad04d7 GR |
960 | data->temp8[LOCAL_HIGH] = val; |
961 | ||
a095f687 | 962 | if (data->reg_local_ext) { |
37ad04d7 GR |
963 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
964 | data->reg_local_ext); | |
965 | if (val < 0) | |
eb1c8f43 | 966 | return val; |
37ad04d7 | 967 | data->temp11[LOCAL_TEMP] = val; |
15b66ab6 | 968 | } else { |
37ad04d7 GR |
969 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
970 | if (val < 0) | |
eb1c8f43 | 971 | return val; |
37ad04d7 | 972 | data->temp11[LOCAL_TEMP] = val << 8; |
15b66ab6 | 973 | } |
37ad04d7 GR |
974 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
975 | LM90_REG_R_REMOTE_TEMPL); | |
976 | if (val < 0) | |
eb1c8f43 | 977 | return val; |
37ad04d7 GR |
978 | data->temp11[REMOTE_TEMP] = val; |
979 | ||
15b66ab6 | 980 | if (data->kind == max6696) { |
7a1d220c | 981 | val = lm90_select_remote_channel(data, 1); |
37ad04d7 | 982 | if (val < 0) |
eb1c8f43 | 983 | return val; |
37ad04d7 | 984 | |
37ad04d7 GR |
985 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
986 | LM90_REG_R_REMOTE_TEMPL); | |
eb1c8f43 | 987 | if (val < 0) { |
7a1d220c | 988 | lm90_select_remote_channel(data, 0); |
eb1c8f43 GR |
989 | return val; |
990 | } | |
37ad04d7 GR |
991 | data->temp11[REMOTE2_TEMP] = val; |
992 | ||
7a1d220c | 993 | lm90_select_remote_channel(data, 0); |
15b66ab6 GR |
994 | } |
995 | ||
f6d07751 GR |
996 | val = lm90_update_alarms_locked(data, false); |
997 | if (val < 0) | |
998 | return val; | |
15b66ab6 GR |
999 | |
1000 | data->last_updated = jiffies; | |
2f83ab77 | 1001 | data->valid = true; |
15b66ab6 GR |
1002 | } |
1003 | ||
eb1c8f43 | 1004 | return 0; |
15b66ab6 GR |
1005 | } |
1006 | ||
cea50fe2 NC |
1007 | /* |
1008 | * Conversions | |
1009 | * For local temperatures and limits, critical limits and the hysteresis | |
1010 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
1011 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
1012 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
1013 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
1014 | */ |
1015 | ||
9d4d3834 | 1016 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
1017 | { |
1018 | return val * 1000; | |
1019 | } | |
1020 | ||
271dabf5 BH |
1021 | static inline int temp_from_u8(u8 val) |
1022 | { | |
1023 | return val * 1000; | |
1024 | } | |
1025 | ||
9d4d3834 | 1026 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
1027 | { |
1028 | return val / 32 * 125; | |
1029 | } | |
1030 | ||
271dabf5 BH |
1031 | static inline int temp_from_u16(u16 val) |
1032 | { | |
1033 | return val / 32 * 125; | |
1034 | } | |
1035 | ||
9d4d3834 | 1036 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
1037 | { |
1038 | if (val <= -128000) | |
1039 | return -128; | |
1040 | if (val >= 127000) | |
1041 | return 127; | |
1042 | if (val < 0) | |
1043 | return (val - 500) / 1000; | |
1044 | return (val + 500) / 1000; | |
1045 | } | |
1046 | ||
271dabf5 BH |
1047 | static u8 temp_to_u8(long val) |
1048 | { | |
1049 | if (val <= 0) | |
1050 | return 0; | |
1051 | if (val >= 255000) | |
1052 | return 255; | |
1053 | return (val + 500) / 1000; | |
1054 | } | |
1055 | ||
9d4d3834 | 1056 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
1057 | { |
1058 | if (val <= -128000) | |
1059 | return 0x8000; | |
1060 | if (val >= 127875) | |
1061 | return 0x7FE0; | |
1062 | if (val < 0) | |
1063 | return (val - 62) / 125 * 32; | |
1064 | return (val + 62) / 125 * 32; | |
1065 | } | |
1066 | ||
1067 | static u8 hyst_to_reg(long val) | |
1068 | { | |
1069 | if (val <= 0) | |
1070 | return 0; | |
1071 | if (val >= 30500) | |
1072 | return 31; | |
1073 | return (val + 500) / 1000; | |
1074 | } | |
1075 | ||
1076 | /* | |
23b2d477 NC |
1077 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
1078 | * attempts to write values that are outside the range 0 < temp < 127 are | |
1079 | * treated as the boundary value. | |
1080 | * | |
1081 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
1082 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 1083 | */ |
9d4d3834 | 1084 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 1085 | { |
23b2d477 NC |
1086 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
1087 | return (val - 64) * 1000; | |
589f707c | 1088 | return temp_from_s8(val); |
cea50fe2 NC |
1089 | } |
1090 | ||
9d4d3834 | 1091 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 1092 | { |
23b2d477 NC |
1093 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
1094 | return (val - 0x4000) / 64 * 250; | |
589f707c | 1095 | return temp_from_s16(val); |
23b2d477 NC |
1096 | } |
1097 | ||
9d4d3834 | 1098 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
1099 | { |
1100 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
1101 | if (val <= -64000) | |
1102 | return 0; | |
1103 | if (val >= 191000) | |
1104 | return 0xFF; | |
1105 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 1106 | } |
589f707c GR |
1107 | if (val <= 0) |
1108 | return 0; | |
1109 | if (val >= 127000) | |
1110 | return 127; | |
1111 | return (val + 500) / 1000; | |
23b2d477 NC |
1112 | } |
1113 | ||
9d4d3834 | 1114 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
1115 | { |
1116 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
1117 | if (val <= -64000) | |
1118 | return 0; | |
1119 | if (val >= 191750) | |
1120 | return 0xFFC0; | |
1121 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 1122 | } |
589f707c GR |
1123 | if (val <= 0) |
1124 | return 0; | |
1125 | if (val >= 127750) | |
1126 | return 0x7FC0; | |
1127 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
1128 | } |
1129 | ||
eb1c8f43 | 1130 | /* pec used for ADM1032 only */ |
e57959a6 | 1131 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
eb1c8f43 | 1132 | char *buf) |
30d7394b | 1133 | { |
eb1c8f43 | 1134 | struct i2c_client *client = to_i2c_client(dev); |
97ae60bb | 1135 | |
eb1c8f43 | 1136 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
30d7394b JD |
1137 | } |
1138 | ||
e57959a6 JL |
1139 | static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, |
1140 | const char *buf, size_t count) | |
30d7394b | 1141 | { |
eb1c8f43 | 1142 | struct i2c_client *client = to_i2c_client(dev); |
11e57812 GR |
1143 | long val; |
1144 | int err; | |
1145 | ||
179c4fdb | 1146 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1147 | if (err < 0) |
1148 | return err; | |
30d7394b | 1149 | |
eb1c8f43 GR |
1150 | switch (val) { |
1151 | case 0: | |
1152 | client->flags &= ~I2C_CLIENT_PEC; | |
1153 | break; | |
1154 | case 1: | |
1155 | client->flags |= I2C_CLIENT_PEC; | |
1156 | break; | |
1157 | default: | |
1158 | return -EINVAL; | |
1159 | } | |
06e1c0a2 | 1160 | |
30d7394b | 1161 | return count; |
1da177e4 | 1162 | } |
30d7394b | 1163 | |
e57959a6 | 1164 | static DEVICE_ATTR_RW(pec); |
eb1c8f43 GR |
1165 | |
1166 | static int lm90_get_temp11(struct lm90_data *data, int index) | |
30d7394b | 1167 | { |
eb1c8f43 | 1168 | s16 temp11 = data->temp11[index]; |
23b2d477 NC |
1169 | int temp; |
1170 | ||
f347e249 | 1171 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1172 | temp = temp_from_u16_adt7461(data, temp11); |
271dabf5 | 1173 | else if (data->kind == max6646) |
eb1c8f43 | 1174 | temp = temp_from_u16(temp11); |
23b2d477 | 1175 | else |
eb1c8f43 | 1176 | temp = temp_from_s16(temp11); |
23b2d477 | 1177 | |
97ae60bb | 1178 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1179 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
1180 | temp += 16000; |
1181 | ||
eb1c8f43 | 1182 | return temp; |
1da177e4 | 1183 | } |
30d7394b | 1184 | |
eb1c8f43 | 1185 | static int lm90_set_temp11(struct lm90_data *data, int index, long val) |
30d7394b | 1186 | { |
eb1c8f43 | 1187 | static struct reg { |
96512861 GR |
1188 | u8 high; |
1189 | u8 low; | |
eb1c8f43 GR |
1190 | } reg[] = { |
1191 | [REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1192 | [REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }, | |
1193 | [REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL }, | |
1194 | [REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
1195 | [REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL } | |
30d7394b | 1196 | }; |
1de8b250 | 1197 | struct i2c_client *client = data->client; |
eb1c8f43 | 1198 | struct reg *regp = ®[index]; |
11e57812 GR |
1199 | int err; |
1200 | ||
97ae60bb | 1201 | /* +16 degrees offset for temp2 for the LM99 */ |
b50aa496 DO |
1202 | if (data->kind == lm99 && index <= 2) { |
1203 | /* prevent integer underflow */ | |
1204 | val = max(val, -128000l); | |
97ae60bb | 1205 | val -= 16000; |
b50aa496 | 1206 | } |
97ae60bb | 1207 | |
f347e249 | 1208 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
96512861 | 1209 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 1210 | else if (data->kind == max6646) |
96512861 | 1211 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 1212 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 1213 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 1214 | else |
96512861 | 1215 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 1216 | |
7a1d220c | 1217 | lm90_select_remote_channel(data, index >= 3); |
eb1c8f43 | 1218 | err = i2c_smbus_write_byte_data(client, regp->high, |
96512861 | 1219 | data->temp11[index] >> 8); |
eb1c8f43 GR |
1220 | if (err < 0) |
1221 | return err; | |
88073bb1 | 1222 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
eb1c8f43 GR |
1223 | err = i2c_smbus_write_byte_data(client, regp->low, |
1224 | data->temp11[index] & 0xff); | |
06e1c0a2 | 1225 | |
7a1d220c | 1226 | lm90_select_remote_channel(data, 0); |
eb1c8f43 | 1227 | return err; |
1da177e4 | 1228 | } |
30d7394b | 1229 | |
eb1c8f43 | 1230 | static int lm90_get_temp8(struct lm90_data *data, int index) |
30d7394b | 1231 | { |
eb1c8f43 | 1232 | s8 temp8 = data->temp8[index]; |
23b2d477 NC |
1233 | int temp; |
1234 | ||
f347e249 | 1235 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1236 | temp = temp_from_u8_adt7461(data, temp8); |
ec38fa2b | 1237 | else if (data->kind == max6646) |
eb1c8f43 | 1238 | temp = temp_from_u8(temp8); |
23b2d477 | 1239 | else |
eb1c8f43 | 1240 | temp = temp_from_s8(temp8); |
23b2d477 | 1241 | |
97ae60bb | 1242 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 1243 | if (data->kind == lm99 && index == 3) |
97ae60bb JD |
1244 | temp += 16000; |
1245 | ||
eb1c8f43 | 1246 | return temp; |
1da177e4 | 1247 | } |
1da177e4 | 1248 | |
eb1c8f43 | 1249 | static int lm90_set_temp8(struct lm90_data *data, int index, long val) |
1da177e4 | 1250 | { |
eb1c8f43 GR |
1251 | static const u8 reg[TEMP8_REG_NUM] = { |
1252 | LM90_REG_W_LOCAL_LOW, | |
1253 | LM90_REG_W_LOCAL_HIGH, | |
1254 | LM90_REG_W_LOCAL_CRIT, | |
1255 | LM90_REG_W_REMOTE_CRIT, | |
1256 | MAX6659_REG_W_LOCAL_EMERG, | |
1257 | MAX6659_REG_W_REMOTE_EMERG, | |
1258 | LM90_REG_W_REMOTE_CRIT, | |
1259 | MAX6659_REG_W_REMOTE_EMERG, | |
1260 | }; | |
1de8b250 | 1261 | struct i2c_client *client = data->client; |
11e57812 | 1262 | int err; |
1da177e4 | 1263 | |
eb1c8f43 | 1264 | /* +16 degrees offset for temp2 for the LM99 */ |
b50aa496 DO |
1265 | if (data->kind == lm99 && index == 3) { |
1266 | /* prevent integer underflow */ | |
1267 | val = max(val, -128000l); | |
eb1c8f43 | 1268 | val -= 16000; |
b50aa496 | 1269 | } |
11e57812 | 1270 | |
f347e249 | 1271 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 | 1272 | data->temp8[index] = temp_to_u8_adt7461(data, val); |
ec38fa2b | 1273 | else if (data->kind == max6646) |
eb1c8f43 | 1274 | data->temp8[index] = temp_to_u8(val); |
ec38fa2b | 1275 | else |
eb1c8f43 | 1276 | data->temp8[index] = temp_to_s8(val); |
ec38fa2b | 1277 | |
7a1d220c | 1278 | lm90_select_remote_channel(data, index >= 6); |
eb1c8f43 | 1279 | err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]); |
7a1d220c | 1280 | lm90_select_remote_channel(data, 0); |
37ad04d7 | 1281 | |
eb1c8f43 | 1282 | return err; |
1da177e4 LT |
1283 | } |
1284 | ||
eb1c8f43 | 1285 | static int lm90_get_temphyst(struct lm90_data *data, int index) |
2d45771e | 1286 | { |
eb1c8f43 | 1287 | int temp; |
37ad04d7 | 1288 | |
f347e249 | 1289 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 GR |
1290 | temp = temp_from_u8_adt7461(data, data->temp8[index]); |
1291 | else if (data->kind == max6646) | |
1292 | temp = temp_from_u8(data->temp8[index]); | |
1293 | else | |
1294 | temp = temp_from_s8(data->temp8[index]); | |
2d45771e | 1295 | |
eb1c8f43 GR |
1296 | /* +16 degrees offset for temp2 for the LM99 */ |
1297 | if (data->kind == lm99 && index == 3) | |
1298 | temp += 16000; | |
0c01b644 | 1299 | |
eb1c8f43 | 1300 | return temp - temp_from_s8(data->temp_hyst); |
0c01b644 GR |
1301 | } |
1302 | ||
eb1c8f43 | 1303 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
0c01b644 | 1304 | { |
1de8b250 | 1305 | struct i2c_client *client = data->client; |
eb1c8f43 | 1306 | int temp; |
0c01b644 GR |
1307 | int err; |
1308 | ||
f347e249 | 1309 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) |
eb1c8f43 GR |
1310 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); |
1311 | else if (data->kind == max6646) | |
1312 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); | |
1313 | else | |
1314 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); | |
0c01b644 | 1315 | |
55840b9e GR |
1316 | /* prevent integer overflow/underflow */ |
1317 | val = clamp_val(val, -128000l, 255000l); | |
b50aa496 | 1318 | |
eb1c8f43 GR |
1319 | data->temp_hyst = hyst_to_reg(temp - val); |
1320 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, | |
1321 | data->temp_hyst); | |
1322 | return err; | |
0c01b644 GR |
1323 | } |
1324 | ||
eb1c8f43 GR |
1325 | static const u8 lm90_temp_index[3] = { |
1326 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP | |
0e39e01c JD |
1327 | }; |
1328 | ||
eb1c8f43 GR |
1329 | static const u8 lm90_temp_min_index[3] = { |
1330 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW | |
0e39e01c JD |
1331 | }; |
1332 | ||
eb1c8f43 GR |
1333 | static const u8 lm90_temp_max_index[3] = { |
1334 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH | |
742192f5 GR |
1335 | }; |
1336 | ||
eb1c8f43 GR |
1337 | static const u8 lm90_temp_crit_index[3] = { |
1338 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT | |
742192f5 GR |
1339 | }; |
1340 | ||
eb1c8f43 GR |
1341 | static const u8 lm90_temp_emerg_index[3] = { |
1342 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG | |
6948708d GR |
1343 | }; |
1344 | ||
eb1c8f43 | 1345 | static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; |
e9572fdd | 1346 | static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 }; |
eb1c8f43 | 1347 | static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; |
da7dc056 | 1348 | static const u8 lm90_crit_alarm_bits_swapped[3] = { 1, 0, 9 }; |
eb1c8f43 GR |
1349 | static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; |
1350 | static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; | |
6948708d | 1351 | |
eb1c8f43 GR |
1352 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1353 | { | |
1354 | struct lm90_data *data = dev_get_drvdata(dev); | |
f6d07751 | 1355 | int err, bit; |
06e1c0a2 | 1356 | |
eb1c8f43 GR |
1357 | mutex_lock(&data->update_lock); |
1358 | err = lm90_update_device(dev); | |
1359 | mutex_unlock(&data->update_lock); | |
1360 | if (err) | |
1361 | return err; | |
06e1c0a2 | 1362 | |
eb1c8f43 GR |
1363 | switch (attr) { |
1364 | case hwmon_temp_input: | |
1365 | *val = lm90_get_temp11(data, lm90_temp_index[channel]); | |
1366 | break; | |
1367 | case hwmon_temp_min_alarm: | |
eb1c8f43 | 1368 | case hwmon_temp_max_alarm: |
eb1c8f43 | 1369 | case hwmon_temp_crit_alarm: |
eb1c8f43 | 1370 | case hwmon_temp_emergency_alarm: |
eb1c8f43 | 1371 | case hwmon_temp_fault: |
f6d07751 GR |
1372 | switch (attr) { |
1373 | case hwmon_temp_min_alarm: | |
1374 | bit = BIT(lm90_min_alarm_bits[channel]); | |
1375 | break; | |
1376 | case hwmon_temp_max_alarm: | |
1377 | bit = BIT(lm90_max_alarm_bits[channel]); | |
1378 | break; | |
1379 | case hwmon_temp_crit_alarm: | |
1380 | if (data->flags & LM90_HAVE_CRIT_ALRM_SWP) | |
1381 | bit = BIT(lm90_crit_alarm_bits_swapped[channel]); | |
1382 | else | |
1383 | bit = BIT(lm90_crit_alarm_bits[channel]); | |
1384 | break; | |
1385 | case hwmon_temp_emergency_alarm: | |
1386 | bit = BIT(lm90_emergency_alarm_bits[channel]); | |
1387 | break; | |
1388 | case hwmon_temp_fault: | |
1389 | bit = BIT(lm90_fault_bits[channel]); | |
1390 | break; | |
1391 | } | |
1392 | *val = !!(data->alarms & bit); | |
1393 | data->alarms &= ~bit; | |
1394 | data->alarms |= data->current_alarms; | |
eb1c8f43 GR |
1395 | break; |
1396 | case hwmon_temp_min: | |
1397 | if (channel == 0) | |
1398 | *val = lm90_get_temp8(data, | |
1399 | lm90_temp_min_index[channel]); | |
1400 | else | |
1401 | *val = lm90_get_temp11(data, | |
1402 | lm90_temp_min_index[channel]); | |
1403 | break; | |
1404 | case hwmon_temp_max: | |
1405 | if (channel == 0) | |
1406 | *val = lm90_get_temp8(data, | |
1407 | lm90_temp_max_index[channel]); | |
1408 | else | |
1409 | *val = lm90_get_temp11(data, | |
1410 | lm90_temp_max_index[channel]); | |
1411 | break; | |
1412 | case hwmon_temp_crit: | |
1413 | *val = lm90_get_temp8(data, lm90_temp_crit_index[channel]); | |
1414 | break; | |
1415 | case hwmon_temp_crit_hyst: | |
1416 | *val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]); | |
1417 | break; | |
1418 | case hwmon_temp_emergency: | |
1419 | *val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]); | |
1420 | break; | |
1421 | case hwmon_temp_emergency_hyst: | |
1422 | *val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]); | |
1423 | break; | |
1424 | case hwmon_temp_offset: | |
1425 | *val = lm90_get_temp11(data, REMOTE_OFFSET); | |
1426 | break; | |
1427 | default: | |
1428 | return -EOPNOTSUPP; | |
1429 | } | |
1430 | return 0; | |
1431 | } | |
06e1c0a2 | 1432 | |
eb1c8f43 GR |
1433 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1434 | { | |
1435 | struct lm90_data *data = dev_get_drvdata(dev); | |
1436 | int err; | |
06e1c0a2 | 1437 | |
eb1c8f43 | 1438 | mutex_lock(&data->update_lock); |
06e1c0a2 | 1439 | |
eb1c8f43 GR |
1440 | err = lm90_update_device(dev); |
1441 | if (err) | |
1442 | goto error; | |
1443 | ||
1444 | switch (attr) { | |
1445 | case hwmon_temp_min: | |
1446 | if (channel == 0) | |
1447 | err = lm90_set_temp8(data, | |
1448 | lm90_temp_min_index[channel], | |
1449 | val); | |
1450 | else | |
1451 | err = lm90_set_temp11(data, | |
1452 | lm90_temp_min_index[channel], | |
1453 | val); | |
1454 | break; | |
1455 | case hwmon_temp_max: | |
1456 | if (channel == 0) | |
1457 | err = lm90_set_temp8(data, | |
1458 | lm90_temp_max_index[channel], | |
1459 | val); | |
1460 | else | |
1461 | err = lm90_set_temp11(data, | |
1462 | lm90_temp_max_index[channel], | |
1463 | val); | |
1464 | break; | |
1465 | case hwmon_temp_crit: | |
1466 | err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val); | |
1467 | break; | |
1468 | case hwmon_temp_crit_hyst: | |
1469 | err = lm90_set_temphyst(data, val); | |
1470 | break; | |
1471 | case hwmon_temp_emergency: | |
1472 | err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val); | |
1473 | break; | |
1474 | case hwmon_temp_offset: | |
1475 | err = lm90_set_temp11(data, REMOTE_OFFSET, val); | |
1476 | break; | |
1477 | default: | |
1478 | err = -EOPNOTSUPP; | |
1479 | break; | |
1480 | } | |
1481 | error: | |
1482 | mutex_unlock(&data->update_lock); | |
1483 | ||
1484 | return err; | |
1485 | } | |
1486 | ||
1487 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) | |
c3df5806 | 1488 | { |
eb1c8f43 GR |
1489 | switch (attr) { |
1490 | case hwmon_temp_input: | |
1491 | case hwmon_temp_min_alarm: | |
1492 | case hwmon_temp_max_alarm: | |
1493 | case hwmon_temp_crit_alarm: | |
1494 | case hwmon_temp_emergency_alarm: | |
1495 | case hwmon_temp_emergency_hyst: | |
1496 | case hwmon_temp_fault: | |
3334851d | 1497 | return 0444; |
eb1c8f43 GR |
1498 | case hwmon_temp_min: |
1499 | case hwmon_temp_max: | |
1500 | case hwmon_temp_crit: | |
1501 | case hwmon_temp_emergency: | |
1502 | case hwmon_temp_offset: | |
3334851d | 1503 | return 0644; |
eb1c8f43 GR |
1504 | case hwmon_temp_crit_hyst: |
1505 | if (channel == 0) | |
3334851d GR |
1506 | return 0644; |
1507 | return 0444; | |
eb1c8f43 GR |
1508 | default: |
1509 | return 0; | |
1510 | } | |
c3df5806 JD |
1511 | } |
1512 | ||
eb1c8f43 | 1513 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
c3df5806 | 1514 | { |
eb1c8f43 | 1515 | struct lm90_data *data = dev_get_drvdata(dev); |
11e57812 GR |
1516 | int err; |
1517 | ||
eb1c8f43 GR |
1518 | mutex_lock(&data->update_lock); |
1519 | err = lm90_update_device(dev); | |
1520 | mutex_unlock(&data->update_lock); | |
1521 | if (err) | |
11e57812 | 1522 | return err; |
c3df5806 | 1523 | |
eb1c8f43 GR |
1524 | switch (attr) { |
1525 | case hwmon_chip_update_interval: | |
1526 | *val = data->update_interval; | |
c3df5806 | 1527 | break; |
eb1c8f43 GR |
1528 | case hwmon_chip_alarms: |
1529 | *val = data->alarms; | |
c3df5806 JD |
1530 | break; |
1531 | default: | |
eb1c8f43 | 1532 | return -EOPNOTSUPP; |
c3df5806 JD |
1533 | } |
1534 | ||
eb1c8f43 | 1535 | return 0; |
c3df5806 JD |
1536 | } |
1537 | ||
eb1c8f43 GR |
1538 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1539 | { | |
1540 | struct lm90_data *data = dev_get_drvdata(dev); | |
1541 | struct i2c_client *client = data->client; | |
1542 | int err; | |
c3df5806 | 1543 | |
eb1c8f43 GR |
1544 | mutex_lock(&data->update_lock); |
1545 | ||
1546 | err = lm90_update_device(dev); | |
1547 | if (err) | |
1548 | goto error; | |
1549 | ||
1550 | switch (attr) { | |
1551 | case hwmon_chip_update_interval: | |
1552 | err = lm90_set_convrate(client, data, | |
1553 | clamp_val(val, 0, 100000)); | |
1554 | break; | |
1555 | default: | |
1556 | err = -EOPNOTSUPP; | |
1557 | break; | |
1558 | } | |
1559 | error: | |
1560 | mutex_unlock(&data->update_lock); | |
1561 | ||
1562 | return err; | |
1563 | } | |
1564 | ||
1565 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) | |
1566 | { | |
1567 | switch (attr) { | |
1568 | case hwmon_chip_update_interval: | |
3334851d | 1569 | return 0644; |
eb1c8f43 | 1570 | case hwmon_chip_alarms: |
3334851d | 1571 | return 0444; |
eb1c8f43 GR |
1572 | default: |
1573 | return 0; | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, | |
1578 | u32 attr, int channel, long *val) | |
1579 | { | |
1580 | switch (type) { | |
1581 | case hwmon_chip: | |
1582 | return lm90_chip_read(dev, attr, channel, val); | |
1583 | case hwmon_temp: | |
1584 | return lm90_temp_read(dev, attr, channel, val); | |
1585 | default: | |
1586 | return -EOPNOTSUPP; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, | |
1591 | u32 attr, int channel, long val) | |
1592 | { | |
1593 | switch (type) { | |
1594 | case hwmon_chip: | |
1595 | return lm90_chip_write(dev, attr, channel, val); | |
1596 | case hwmon_temp: | |
1597 | return lm90_temp_write(dev, attr, channel, val); | |
1598 | default: | |
1599 | return -EOPNOTSUPP; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, | |
1604 | u32 attr, int channel) | |
1605 | { | |
1606 | switch (type) { | |
1607 | case hwmon_chip: | |
1608 | return lm90_chip_is_visible(data, attr, channel); | |
1609 | case hwmon_temp: | |
1610 | return lm90_temp_is_visible(data, attr, channel); | |
1611 | default: | |
1612 | return 0; | |
1613 | } | |
1614 | } | |
1da177e4 | 1615 | |
15b66ab6 | 1616 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1617 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1618 | struct i2c_board_info *info) |
8256fe0f | 1619 | { |
b2589ab0 JD |
1620 | struct i2c_adapter *adapter = client->adapter; |
1621 | int address = client->addr; | |
15b66ab6 | 1622 | const char *name = NULL; |
b2589ab0 | 1623 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1624 | |
15b66ab6 GR |
1625 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1626 | return -ENODEV; | |
1da177e4 | 1627 | |
8f2fa77c | 1628 | /* detection and identification */ |
b2589ab0 JD |
1629 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1630 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1631 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1632 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1633 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1634 | return -ENODEV; |
1635 | ||
fce15c45 | 1636 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0xA1) { |
b2589ab0 JD |
1637 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1638 | if (config2 < 0) | |
9b0e8526 | 1639 | return -ENODEV; |
fce15c45 | 1640 | } |
8f2fa77c | 1641 | |
f90be42f JD |
1642 | if ((address == 0x4C || address == 0x4D) |
1643 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1644 | if ((config1 & 0x2A) == 0x00 |
1645 | && (config2 & 0xF8) == 0x00 | |
1646 | && convrate <= 0x09) { | |
8f2fa77c JD |
1647 | if (address == 0x4C |
1648 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1649 | name = "lm90"; | |
32c82a93 | 1650 | } else |
8f2fa77c JD |
1651 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1652 | name = "lm99"; | |
1653 | dev_info(&adapter->dev, | |
1654 | "Assuming LM99 chip at 0x%02x\n", | |
1655 | address); | |
1656 | dev_info(&adapter->dev, | |
1657 | "If it is an LM89, instantiate it " | |
1658 | "with the new_device sysfs " | |
1659 | "interface\n"); | |
271dabf5 | 1660 | } else |
8f2fa77c JD |
1661 | if (address == 0x4C |
1662 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1663 | name = "lm86"; | |
1da177e4 LT |
1664 | } |
1665 | } | |
8f2fa77c JD |
1666 | } else |
1667 | if ((address == 0x4C || address == 0x4D) | |
1668 | && man_id == 0x41) { /* Analog Devices */ | |
1669 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1670 | && (config1 & 0x3F) == 0x00 |
1671 | && convrate <= 0x0A) { | |
8f2fa77c | 1672 | name = "adm1032"; |
f36ffeab GR |
1673 | /* |
1674 | * The ADM1032 supports PEC, but only if combined | |
1675 | * transactions are not used. | |
1676 | */ | |
8f2fa77c JD |
1677 | if (i2c_check_functionality(adapter, |
1678 | I2C_FUNC_SMBUS_BYTE)) | |
1679 | info->flags |= I2C_CLIENT_PEC; | |
1680 | } else | |
1681 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1682 | && (config1 & 0x1B) == 0x00 |
1683 | && convrate <= 0x0A) { | |
8f2fa77c | 1684 | name = "adt7461"; |
5a4e5e6a GR |
1685 | } else |
1686 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1687 | && (config1 & 0x1B) == 0x00 |
1688 | && convrate <= 0x0A) { | |
5a4e5e6a | 1689 | name = "adt7461a"; |
8f2fa77c JD |
1690 | } |
1691 | } else | |
1692 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1693 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1694 | |
1695 | /* | |
1696 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1697 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1698 | * exists, both readings will reflect the same value. Otherwise, | |
1699 | * the readings will be different. | |
1700 | */ | |
b2589ab0 JD |
1701 | emerg = i2c_smbus_read_byte_data(client, |
1702 | MAX6659_REG_R_REMOTE_EMERG); | |
1703 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1704 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1705 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1706 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1707 | status2 = i2c_smbus_read_byte_data(client, |
1708 | MAX6696_REG_R_STATUS2); | |
1709 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1710 | return -ENODEV; |
1711 | ||
8f2fa77c JD |
1712 | /* |
1713 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1714 | * register. Reading from that address will return the last | |
1715 | * read value, which in our case is those of the man_id | |
1716 | * register. Likewise, the config1 register seems to lack a | |
1717 | * low nibble, so the value will be those of the previous | |
1718 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1719 | * MAX6659 has a third set of upper temperature limit registers. |
1720 | * Those registers also return values on MAX6657 and MAX6658, | |
1721 | * thus the only way to detect MAX6659 is by its address. | |
1722 | * For this reason it will be mis-detected as MAX6657 if its | |
1723 | * address is 0x4C. | |
8f2fa77c JD |
1724 | */ |
1725 | if (chip_id == man_id | |
13c84951 | 1726 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1727 | && (config1 & 0x1F) == (man_id & 0x0F) |
1728 | && convrate <= 0x09) { | |
13c84951 GR |
1729 | if (address == 0x4C) |
1730 | name = "max6657"; | |
1731 | else | |
1732 | name = "max6659"; | |
8f2fa77c | 1733 | } else |
06e1c0a2 GR |
1734 | /* |
1735 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1736 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1737 | * register is unused and should return zero when read. Bit 0 of | |
1738 | * the status2 register is unused and should return zero when | |
1739 | * read. | |
1740 | * | |
1741 | * MAX6695 and MAX6696 have an additional set of temperature | |
1742 | * limit registers. We can detect those chips by checking if | |
1743 | * one of those registers exists. | |
1744 | */ | |
1745 | if (chip_id == 0x01 | |
b2589ab0 JD |
1746 | && (config1 & 0x10) == 0x00 |
1747 | && (status2 & 0x01) == 0x00 | |
1748 | && emerg == emerg2 | |
1749 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1750 | name = "max6696"; |
1751 | } else | |
8f2fa77c JD |
1752 | /* |
1753 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1754 | * revision of the chip. The lowest bit of the config1 register | |
1755 | * is unused and should return zero when read, so should the | |
1756 | * second to last bit of config1 (software reset). | |
1757 | */ | |
1758 | if (chip_id == 0x01 | |
b2589ab0 JD |
1759 | && (config1 & 0x03) == 0x00 |
1760 | && convrate <= 0x07) { | |
8f2fa77c JD |
1761 | name = "max6680"; |
1762 | } else | |
1763 | /* | |
1764 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1765 | * revision of the chip. The lowest 6 bits of the config1 | |
1766 | * register are unused and should return zero when read. | |
1767 | */ | |
1768 | if (chip_id == 0x59 | |
b2589ab0 JD |
1769 | && (config1 & 0x3f) == 0x00 |
1770 | && convrate <= 0x07) { | |
8f2fa77c | 1771 | name = "max6646"; |
229d495d JL |
1772 | } else |
1773 | /* | |
1774 | * The chip_id of the MAX6654 holds the revision of the chip. | |
1775 | * The lowest 3 bits of the config1 register are unused and | |
1776 | * should return zero when read. | |
1777 | */ | |
1778 | if (chip_id == 0x08 | |
1779 | && (config1 & 0x07) == 0x00 | |
1780 | && convrate <= 0x07) { | |
1781 | name = "max6654"; | |
1da177e4 | 1782 | } |
6771ea1f JD |
1783 | } else |
1784 | if (address == 0x4C | |
1785 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1786 | if ((config1 & 0x2A) == 0x00 |
1787 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1788 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1789 | && convrate <= 0x09) { |
c4f99a2b JD |
1790 | name = "w83l771"; |
1791 | } else | |
1792 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1793 | && convrate <= 0x08) { |
c4f99a2b JD |
1794 | name = "w83l771"; |
1795 | } | |
6771ea1f | 1796 | } |
2ef01793 | 1797 | } else |
6d101c58 JD |
1798 | if (address >= 0x48 && address <= 0x4F |
1799 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1800 | if (chip_id == 0x00 |
b2589ab0 JD |
1801 | && (config1 & 0x2A) == 0x00 |
1802 | && (config2 & 0xFE) == 0x00 | |
1803 | && convrate <= 0x09) { | |
2ef01793 SD |
1804 | name = "sa56004"; |
1805 | } | |
ae544f64 GR |
1806 | } else |
1807 | if ((address == 0x4C || address == 0x4D) | |
1808 | && man_id == 0x47) { /* GMT */ | |
1809 | if (chip_id == 0x01 /* G781 */ | |
1810 | && (config1 & 0x3F) == 0x00 | |
1811 | && convrate <= 0x08) | |
1812 | name = "g781"; | |
1daaceb2 | 1813 | } else |
f8344f76 GR |
1814 | if (man_id == 0x55 && chip_id == 0x00 && |
1815 | (config1 & 0x1B) == 0x00 && convrate <= 0x09) { | |
1816 | int local_ext, conalert, chen, dfc; | |
1daaceb2 WN |
1817 | |
1818 | local_ext = i2c_smbus_read_byte_data(client, | |
1819 | TMP451_REG_R_LOCAL_TEMPL); | |
f8344f76 GR |
1820 | conalert = i2c_smbus_read_byte_data(client, |
1821 | TMP451_REG_CONALERT); | |
1822 | chen = i2c_smbus_read_byte_data(client, TMP461_REG_CHEN); | |
1823 | dfc = i2c_smbus_read_byte_data(client, TMP461_REG_DFC); | |
1824 | ||
1825 | if ((local_ext & 0x0F) == 0x00 && | |
1826 | (conalert & 0xf1) == 0x01 && | |
1827 | (chen & 0xfc) == 0x00 && | |
1828 | (dfc & 0xfc) == 0x00) { | |
1829 | if (address == 0x4c && !(chen & 0x03)) | |
1830 | name = "tmp451"; | |
1831 | else if (address >= 0x48 && address <= 0x4f) | |
1832 | name = "tmp461"; | |
1833 | } | |
1da177e4 LT |
1834 | } |
1835 | ||
8f2fa77c JD |
1836 | if (!name) { /* identification failed */ |
1837 | dev_dbg(&adapter->dev, | |
1838 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1839 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1840 | return -ENODEV; | |
1da177e4 | 1841 | } |
8f2fa77c | 1842 | |
9b0e8526 JD |
1843 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1844 | ||
1845 | return 0; | |
1846 | } | |
1847 | ||
1f17a444 | 1848 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1849 | { |
1f17a444 GR |
1850 | struct lm90_data *data = _data; |
1851 | struct i2c_client *client = data->client; | |
1852 | ||
f6d07751 GR |
1853 | cancel_delayed_work_sync(&data->alert_work); |
1854 | ||
f7001bb0 | 1855 | /* Restore initial configuration */ |
7a1d220c | 1856 | lm90_write_convrate(data, data->convrate_orig); |
f7001bb0 GR |
1857 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, |
1858 | data->config_orig); | |
1859 | } | |
1860 | ||
37ad04d7 | 1861 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1862 | { |
45988d90 | 1863 | struct device_node *np = client->dev.of_node; |
37ad04d7 | 1864 | int config, convrate; |
15b66ab6 | 1865 | |
37ad04d7 GR |
1866 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1867 | if (convrate < 0) | |
1868 | return convrate; | |
0c01b644 GR |
1869 | data->convrate_orig = convrate; |
1870 | ||
15b66ab6 GR |
1871 | /* |
1872 | * Start the conversions. | |
1873 | */ | |
37ad04d7 GR |
1874 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1875 | if (config < 0) | |
1876 | return config; | |
15b66ab6 | 1877 | data->config_orig = config; |
b849e5d1 | 1878 | data->config = config; |
15b66ab6 | 1879 | |
62456189 BY |
1880 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
1881 | ||
15b66ab6 | 1882 | /* Check Temperature Range Select */ |
f347e249 | 1883 | if (data->flags & LM90_HAVE_EXTENDED_TEMP) { |
45988d90 HB |
1884 | if (of_property_read_bool(np, "ti,extended-range-enable")) |
1885 | config |= 0x04; | |
1886 | ||
15b66ab6 GR |
1887 | if (config & 0x04) |
1888 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1889 | } | |
1890 | ||
1891 | /* | |
1892 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1893 | * 0.125 degree resolution) and range (0x08, extend range | |
1894 | * to -64 degree) mode for the remote temperature sensor. | |
1895 | */ | |
1896 | if (data->kind == max6680) | |
1897 | config |= 0x18; | |
1898 | ||
229d495d JL |
1899 | /* |
1900 | * Put MAX6654 into extended range (0x20, extend minimum range from | |
1901 | * 0 degrees to -64 degrees). Note that extended resolution is not | |
1902 | * possible on the MAX6654 unless conversion rate is set to 1 Hz or | |
1903 | * slower, which is intentionally not done by default. | |
1904 | */ | |
1905 | if (data->kind == max6654) | |
1906 | config |= 0x20; | |
1907 | ||
15b66ab6 GR |
1908 | /* |
1909 | * Select external channel 0 for max6695/96 | |
1910 | */ | |
1911 | if (data->kind == max6696) | |
1912 | config &= ~0x08; | |
1913 | ||
2abdc357 DO |
1914 | /* |
1915 | * Interrupt is enabled by default on reset, but it may be disabled | |
1916 | * by bootloader, unmask it. | |
1917 | */ | |
1918 | if (client->irq) | |
1919 | config &= ~0x80; | |
1920 | ||
15b66ab6 | 1921 | config &= 0xBF; /* run */ |
7a1d220c | 1922 | lm90_update_confreg(data, config); |
1f17a444 | 1923 | |
c5fcf01b | 1924 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
15b66ab6 GR |
1925 | } |
1926 | ||
f6d07751 | 1927 | static bool lm90_is_tripped(struct i2c_client *client) |
072de496 WN |
1928 | { |
1929 | struct lm90_data *data = i2c_get_clientdata(client); | |
f6d07751 | 1930 | int ret; |
072de496 | 1931 | |
f6d07751 GR |
1932 | ret = lm90_update_alarms(data, true); |
1933 | if (ret < 0) | |
072de496 WN |
1934 | return false; |
1935 | ||
f6d07751 | 1936 | return !!data->current_alarms; |
072de496 WN |
1937 | } |
1938 | ||
109b1283 WN |
1939 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1940 | { | |
1941 | struct i2c_client *client = dev_id; | |
109b1283 | 1942 | |
f6d07751 | 1943 | if (lm90_is_tripped(client)) |
109b1283 WN |
1944 | return IRQ_HANDLED; |
1945 | else | |
1946 | return IRQ_NONE; | |
1947 | } | |
1948 | ||
1f17a444 GR |
1949 | static void lm90_remove_pec(void *dev) |
1950 | { | |
1951 | device_remove_file(dev, &dev_attr_pec); | |
1952 | } | |
1953 | ||
1954 | static void lm90_regulator_disable(void *regulator) | |
1955 | { | |
1956 | regulator_disable(regulator); | |
1957 | } | |
1958 | ||
eb1c8f43 GR |
1959 | |
1960 | static const struct hwmon_ops lm90_ops = { | |
1961 | .is_visible = lm90_is_visible, | |
1962 | .read = lm90_read, | |
1963 | .write = lm90_write, | |
1964 | }; | |
1965 | ||
67487038 | 1966 | static int lm90_probe(struct i2c_client *client) |
9b0e8526 | 1967 | { |
b2589ab0 | 1968 | struct device *dev = &client->dev; |
e67776cc | 1969 | struct i2c_adapter *adapter = client->adapter; |
eb1c8f43 | 1970 | struct hwmon_channel_info *info; |
3e0f964f | 1971 | struct regulator *regulator; |
6e5f62b9 | 1972 | struct device *hwmon_dev; |
eb1c8f43 | 1973 | struct lm90_data *data; |
9b0e8526 | 1974 | int err; |
1da177e4 | 1975 | |
3e0f964f WN |
1976 | regulator = devm_regulator_get(dev, "vcc"); |
1977 | if (IS_ERR(regulator)) | |
1978 | return PTR_ERR(regulator); | |
1979 | ||
1980 | err = regulator_enable(regulator); | |
1981 | if (err < 0) { | |
d89fa686 | 1982 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1983 | return err; |
1984 | } | |
1985 | ||
c5fcf01b GR |
1986 | err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator); |
1987 | if (err) | |
1988 | return err; | |
1f17a444 | 1989 | |
d89fa686 | 1990 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1991 | if (!data) |
1992 | return -ENOMEM; | |
1993 | ||
1de8b250 | 1994 | data->client = client; |
b2589ab0 | 1995 | i2c_set_clientdata(client, data); |
9a61bf63 | 1996 | mutex_init(&data->update_lock); |
f6d07751 | 1997 | INIT_DELAYED_WORK(&data->alert_work, lm90_alert_work); |
1da177e4 | 1998 | |
9b0e8526 | 1999 | /* Set the device type */ |
df8d57bf JMC |
2000 | if (client->dev.of_node) |
2001 | data->kind = (enum chips)of_device_get_match_data(&client->dev); | |
2002 | else | |
67487038 | 2003 | data->kind = i2c_match_id(lm90_id, client)->driver_data; |
9b0e8526 JD |
2004 | if (data->kind == adm1032) { |
2005 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 2006 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 2007 | } |
1da177e4 | 2008 | |
f36ffeab GR |
2009 | /* |
2010 | * Different devices have different alarm bits triggering the | |
2011 | * ALERT# output | |
2012 | */ | |
4667bcb8 | 2013 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 2014 | |
88073bb1 | 2015 | /* Set chip capabilities */ |
4667bcb8 | 2016 | data->flags = lm90_params[data->kind].flags; |
eb1c8f43 GR |
2017 | |
2018 | data->chip.ops = &lm90_ops; | |
2019 | data->chip.info = data->info; | |
2020 | ||
a4d41e67 GR |
2021 | data->info[0] = HWMON_CHANNEL_INFO(chip, |
2022 | HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS); | |
eb1c8f43 GR |
2023 | data->info[1] = &data->temp_info; |
2024 | ||
2025 | info = &data->temp_info; | |
2026 | info->type = hwmon_temp; | |
2027 | info->config = data->channel_config; | |
2028 | ||
2029 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
16ba51b5 | 2030 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM; |
eb1c8f43 | 2031 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | |
16ba51b5 GR |
2032 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | HWMON_T_FAULT; |
2033 | ||
2034 | if (data->flags & LM90_HAVE_CRIT) { | |
2035 | data->channel_config[0] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; | |
2036 | data->channel_config[1] |= HWMON_T_CRIT | HWMON_T_CRIT_ALARM | HWMON_T_CRIT_HYST; | |
2037 | } | |
eb1c8f43 GR |
2038 | |
2039 | if (data->flags & LM90_HAVE_OFFSET) | |
2040 | data->channel_config[1] |= HWMON_T_OFFSET; | |
2041 | ||
2042 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
2043 | data->channel_config[0] |= HWMON_T_EMERGENCY | | |
2044 | HWMON_T_EMERGENCY_HYST; | |
2045 | data->channel_config[1] |= HWMON_T_EMERGENCY | | |
2046 | HWMON_T_EMERGENCY_HYST; | |
2047 | } | |
2048 | ||
2049 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { | |
2050 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; | |
2051 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; | |
2052 | } | |
2053 | ||
2054 | if (data->flags & LM90_HAVE_TEMP3) { | |
2055 | data->channel_config[2] = HWMON_T_INPUT | | |
2056 | HWMON_T_MIN | HWMON_T_MAX | | |
2057 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | | |
2058 | HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST | | |
2059 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | | |
2060 | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM | | |
2061 | HWMON_T_FAULT; | |
2062 | } | |
2063 | ||
a095f687 | 2064 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 2065 | |
0c01b644 GR |
2066 | /* Set maximum conversion rate */ |
2067 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
2068 | ||
1da177e4 | 2069 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
2070 | err = lm90_init_client(client, data); |
2071 | if (err < 0) { | |
2072 | dev_err(dev, "Failed to initialize device\n"); | |
2073 | return err; | |
2074 | } | |
1da177e4 | 2075 | |
eb1c8f43 GR |
2076 | /* |
2077 | * The 'pec' attribute is attached to the i2c device and thus created | |
2078 | * separately. | |
2079 | */ | |
b2589ab0 JD |
2080 | if (client->flags & I2C_CLIENT_PEC) { |
2081 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 2082 | if (err) |
1f17a444 | 2083 | return err; |
c5fcf01b GR |
2084 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
2085 | if (err) | |
2086 | return err; | |
06e1c0a2 | 2087 | } |
0e39e01c | 2088 | |
eb1c8f43 GR |
2089 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
2090 | data, &data->chip, | |
2091 | NULL); | |
6e5f62b9 GR |
2092 | if (IS_ERR(hwmon_dev)) |
2093 | return PTR_ERR(hwmon_dev); | |
943b0830 | 2094 | |
94dbd23e DO |
2095 | data->hwmon_dev = hwmon_dev; |
2096 | ||
109b1283 WN |
2097 | if (client->irq) { |
2098 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
2099 | err = devm_request_threaded_irq(dev, client->irq, | |
2100 | NULL, lm90_irq_thread, | |
d97fb837 | 2101 | IRQF_ONESHOT, "lm90", client); |
109b1283 WN |
2102 | if (err < 0) { |
2103 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 2104 | return err; |
109b1283 WN |
2105 | } |
2106 | } | |
2107 | ||
1da177e4 LT |
2108 | return 0; |
2109 | } | |
2110 | ||
b4f21054 BT |
2111 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
2112 | unsigned int flag) | |
53de3342 | 2113 | { |
b4f21054 BT |
2114 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
2115 | return; | |
2116 | ||
f6d07751 | 2117 | if (lm90_is_tripped(client)) { |
f36ffeab GR |
2118 | /* |
2119 | * Disable ALERT# output, because these chips don't implement | |
2120 | * SMBus alert correctly; they should only hold the alert line | |
2121 | * low briefly. | |
2122 | */ | |
072de496 WN |
2123 | struct lm90_data *data = i2c_get_clientdata(client); |
2124 | ||
37ad04d7 | 2125 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
f6d07751 | 2126 | (data->current_alarms & data->alert_alarms)) { |
53de3342 | 2127 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
7a1d220c | 2128 | lm90_update_confreg(data, data->config | 0x80); |
f6d07751 GR |
2129 | schedule_delayed_work(&data->alert_work, |
2130 | max_t(int, HZ, msecs_to_jiffies(data->update_interval))); | |
53de3342 | 2131 | } |
072de496 | 2132 | } else { |
94dbd23e | 2133 | dev_dbg(&client->dev, "Everything OK\n"); |
53de3342 JD |
2134 | } |
2135 | } | |
2136 | ||
4c7f85a3 DO |
2137 | static int __maybe_unused lm90_suspend(struct device *dev) |
2138 | { | |
2139 | struct lm90_data *data = dev_get_drvdata(dev); | |
2140 | struct i2c_client *client = data->client; | |
2141 | ||
2142 | if (client->irq) | |
2143 | disable_irq(client->irq); | |
2144 | ||
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | static int __maybe_unused lm90_resume(struct device *dev) | |
2149 | { | |
2150 | struct lm90_data *data = dev_get_drvdata(dev); | |
2151 | struct i2c_client *client = data->client; | |
2152 | ||
2153 | if (client->irq) | |
2154 | enable_irq(client->irq); | |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | ||
2159 | static SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume); | |
2160 | ||
15b66ab6 GR |
2161 | static struct i2c_driver lm90_driver = { |
2162 | .class = I2C_CLASS_HWMON, | |
2163 | .driver = { | |
2164 | .name = "lm90", | |
df8d57bf | 2165 | .of_match_table = of_match_ptr(lm90_of_match), |
4c7f85a3 | 2166 | .pm = &lm90_pm_ops, |
15b66ab6 | 2167 | }, |
67487038 | 2168 | .probe_new = lm90_probe, |
15b66ab6 GR |
2169 | .alert = lm90_alert, |
2170 | .id_table = lm90_id, | |
2171 | .detect = lm90_detect, | |
2172 | .address_list = normal_i2c, | |
2173 | }; | |
1da177e4 | 2174 | |
f0967eea | 2175 | module_i2c_driver(lm90_driver); |
1da177e4 | 2176 | |
7c81c60f | 2177 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
2178 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
2179 | MODULE_LICENSE("GPL"); |