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1da177e4 LT |
1 | /* |
2 | * lm90.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
7c81c60f | 4 | * Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de> |
1da177e4 LT |
5 | * |
6 | * Based on the lm83 driver. The LM90 is a sensor chip made by National | |
7 | * Semiconductor. It reports up to two temperatures (its own plus up to | |
8 | * one external one) with a 0.125 deg resolution (1 deg for local | |
a874a10c | 9 | * temperature) and a 3-4 deg accuracy. |
1da177e4 LT |
10 | * |
11 | * This driver also supports the LM89 and LM99, two other sensor chips | |
12 | * made by National Semiconductor. Both have an increased remote | |
13 | * temperature measurement accuracy (1 degree), and the LM99 | |
14 | * additionally shifts remote temperatures (measured and limits) by 16 | |
97ae60bb | 15 | * degrees, which allows for higher temperatures measurement. |
44bbe87e | 16 | * Note that there is no way to differentiate between both chips. |
97ae60bb | 17 | * When device is auto-detected, the driver will assume an LM99. |
1da177e4 LT |
18 | * |
19 | * This driver also supports the LM86, another sensor chip made by | |
20 | * National Semiconductor. It is exactly similar to the LM90 except it | |
21 | * has a higher accuracy. | |
1da177e4 LT |
22 | * |
23 | * This driver also supports the ADM1032, a sensor chip made by Analog | |
24 | * Devices. That chip is similar to the LM90, with a few differences | |
a874a10c JD |
25 | * that are not handled by this driver. Among others, it has a higher |
26 | * accuracy than the LM90, much like the LM86 does. | |
1da177e4 LT |
27 | * |
28 | * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor | |
a874a10c | 29 | * chips made by Maxim. These chips are similar to the LM86. |
44bbe87e | 30 | * Note that there is no easy way to differentiate between the three |
6948708d GR |
31 | * variants. We use the device address to detect MAX6659, which will result |
32 | * in a detection as max6657 if it is on address 0x4c. The extra address | |
33 | * and features of the MAX6659 are only supported if the chip is configured | |
34 | * explicitly as max6659, or if its address is not 0x4c. | |
35 | * These chips lack the remote temperature offset feature. | |
1da177e4 | 36 | * |
1a51e068 DW |
37 | * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and |
38 | * MAX6692 chips made by Maxim. These are again similar to the LM86, | |
39 | * but they use unsigned temperature values and can report temperatures | |
40 | * from 0 to 145 degrees. | |
271dabf5 | 41 | * |
32c82a93 RB |
42 | * This driver also supports the MAX6680 and MAX6681, two other sensor |
43 | * chips made by Maxim. These are quite similar to the other Maxim | |
a874a10c JD |
44 | * chips. The MAX6680 and MAX6681 only differ in the pinout so they can |
45 | * be treated identically. | |
32c82a93 | 46 | * |
06e1c0a2 GR |
47 | * This driver also supports the MAX6695 and MAX6696, two other sensor |
48 | * chips made by Maxim. These are also quite similar to other Maxim | |
49 | * chips, but support three temperature sensors instead of two. MAX6695 | |
50 | * and MAX6696 only differ in the pinout so they can be treated identically. | |
51 | * | |
5a4e5e6a GR |
52 | * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as |
53 | * NCT1008 from ON Semiconductor. The chips are supported in both compatibility | |
54 | * and extended mode. They are mostly compatible with LM90 except for a data | |
55 | * format difference for the temperature value registers. | |
1da177e4 | 56 | * |
2ef01793 SD |
57 | * This driver also supports the SA56004 from Philips. This device is |
58 | * pin-compatible with the LM86, the ED/EDP parts are also address-compatible. | |
59 | * | |
ae544f64 GR |
60 | * This driver also supports the G781 from GMT. This device is compatible |
61 | * with the ADM1032. | |
62 | * | |
1daaceb2 WN |
63 | * This driver also supports TMP451 from Texas Instruments. This device is |
64 | * supported in both compatibility and extended mode. It's mostly compatible | |
65 | * with ADT7461 except for local temperature low byte register and max | |
66 | * conversion rate. | |
67 | * | |
1da177e4 LT |
68 | * Since the LM90 was the first chipset supported by this driver, most |
69 | * comments will refer to this chipset, but are actually general and | |
70 | * concern all supported chipsets, unless mentioned otherwise. | |
71 | * | |
72 | * This program is free software; you can redistribute it and/or modify | |
73 | * it under the terms of the GNU General Public License as published by | |
74 | * the Free Software Foundation; either version 2 of the License, or | |
75 | * (at your option) any later version. | |
76 | * | |
77 | * This program is distributed in the hope that it will be useful, | |
78 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
79 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
80 | * GNU General Public License for more details. | |
81 | * | |
82 | * You should have received a copy of the GNU General Public License | |
83 | * along with this program; if not, write to the Free Software | |
84 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
85 | */ | |
86 | ||
1da177e4 LT |
87 | #include <linux/module.h> |
88 | #include <linux/init.h> | |
89 | #include <linux/slab.h> | |
90 | #include <linux/jiffies.h> | |
91 | #include <linux/i2c.h> | |
10c08f81 | 92 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
93 | #include <linux/hwmon.h> |
94 | #include <linux/err.h> | |
9a61bf63 | 95 | #include <linux/mutex.h> |
0e39e01c | 96 | #include <linux/sysfs.h> |
109b1283 | 97 | #include <linux/interrupt.h> |
3e0f964f | 98 | #include <linux/regulator/consumer.h> |
1da177e4 LT |
99 | |
100 | /* | |
101 | * Addresses to scan | |
102 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 103 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
104 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
105 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
106 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
107 | * have address 0x4d. | |
271dabf5 | 108 | * MAX6647 has address 0x4e. |
13c84951 | 109 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
32c82a93 RB |
110 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
111 | * 0x4c, 0x4d or 0x4e. | |
2ef01793 | 112 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
113 | */ |
114 | ||
25e9c86d | 115 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
116 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
117 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 118 | |
13c84951 | 119 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
1daaceb2 | 120 | max6646, w83l771, max6696, sa56004, g781, tmp451 }; |
1da177e4 LT |
121 | |
122 | /* | |
123 | * The LM90 registers | |
124 | */ | |
125 | ||
126 | #define LM90_REG_R_MAN_ID 0xFE | |
127 | #define LM90_REG_R_CHIP_ID 0xFF | |
128 | #define LM90_REG_R_CONFIG1 0x03 | |
129 | #define LM90_REG_W_CONFIG1 0x09 | |
130 | #define LM90_REG_R_CONFIG2 0xBF | |
131 | #define LM90_REG_W_CONFIG2 0xBF | |
132 | #define LM90_REG_R_CONVRATE 0x04 | |
133 | #define LM90_REG_W_CONVRATE 0x0A | |
134 | #define LM90_REG_R_STATUS 0x02 | |
135 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
136 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
137 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
138 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
139 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
140 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
141 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
142 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
143 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
144 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
145 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
146 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
147 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
148 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
149 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
150 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
151 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
152 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
153 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
154 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
155 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
156 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
157 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
158 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
159 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
160 | ||
06e1c0a2 | 161 | /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
162 | |
163 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 164 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
165 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
166 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
167 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
168 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 169 | |
2ef01793 SD |
170 | /* SA56004 registers */ |
171 | ||
172 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
173 | ||
0c01b644 GR |
174 | #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */ |
175 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ | |
176 | ||
1daaceb2 WN |
177 | /* TMP451 registers */ |
178 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 | |
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 */ |
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 }, | |
9b0e8526 JD |
225 | { "max6657", max6657 }, |
226 | { "max6658", max6657 }, | |
13c84951 | 227 | { "max6659", max6659 }, |
9b0e8526 JD |
228 | { "max6680", max6680 }, |
229 | { "max6681", max6680 }, | |
06e1c0a2 GR |
230 | { "max6695", max6696 }, |
231 | { "max6696", max6696 }, | |
5a4e5e6a | 232 | { "nct1008", adt7461 }, |
6771ea1f | 233 | { "w83l771", w83l771 }, |
2ef01793 | 234 | { "sa56004", sa56004 }, |
1daaceb2 | 235 | { "tmp451", tmp451 }, |
9b0e8526 JD |
236 | { } |
237 | }; | |
238 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
239 | ||
4667bcb8 GR |
240 | /* |
241 | * chip type specific parameters | |
242 | */ | |
243 | struct lm90_params { | |
244 | u32 flags; /* Capabilities */ | |
245 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
246 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 247 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 248 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
249 | }; |
250 | ||
251 | static const struct lm90_params lm90_params[] = { | |
252 | [adm1032] = { | |
1179324c GR |
253 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
254 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 255 | .alert_alarms = 0x7c, |
0c01b644 | 256 | .max_convrate = 10, |
4667bcb8 GR |
257 | }, |
258 | [adt7461] = { | |
1179324c GR |
259 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
260 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 261 | .alert_alarms = 0x7c, |
0c01b644 | 262 | .max_convrate = 10, |
4667bcb8 | 263 | }, |
ae544f64 GR |
264 | [g781] = { |
265 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
266 | | LM90_HAVE_BROKEN_ALERT, | |
267 | .alert_alarms = 0x7c, | |
268 | .max_convrate = 8, | |
269 | }, | |
4667bcb8 GR |
270 | [lm86] = { |
271 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
272 | .alert_alarms = 0x7b, | |
0c01b644 | 273 | .max_convrate = 9, |
4667bcb8 GR |
274 | }, |
275 | [lm90] = { | |
276 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
277 | .alert_alarms = 0x7b, | |
0c01b644 | 278 | .max_convrate = 9, |
4667bcb8 GR |
279 | }, |
280 | [lm99] = { | |
281 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
282 | .alert_alarms = 0x7b, | |
0c01b644 | 283 | .max_convrate = 9, |
4667bcb8 GR |
284 | }, |
285 | [max6646] = { | |
4667bcb8 | 286 | .alert_alarms = 0x7c, |
0c01b644 | 287 | .max_convrate = 6, |
2ef01793 | 288 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
289 | }, |
290 | [max6657] = { | |
4667bcb8 | 291 | .alert_alarms = 0x7c, |
0c01b644 | 292 | .max_convrate = 8, |
2ef01793 | 293 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
294 | }, |
295 | [max6659] = { | |
a095f687 | 296 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 297 | .alert_alarms = 0x7c, |
0c01b644 | 298 | .max_convrate = 8, |
2ef01793 | 299 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
300 | }, |
301 | [max6680] = { | |
302 | .flags = LM90_HAVE_OFFSET, | |
303 | .alert_alarms = 0x7c, | |
0c01b644 | 304 | .max_convrate = 7, |
4667bcb8 GR |
305 | }, |
306 | [max6696] = { | |
a095f687 | 307 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 308 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 309 | .alert_alarms = 0x1c7c, |
0c01b644 | 310 | .max_convrate = 6, |
2ef01793 | 311 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
312 | }, |
313 | [w83l771] = { | |
314 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
315 | .alert_alarms = 0x7c, | |
0c01b644 | 316 | .max_convrate = 8, |
4667bcb8 | 317 | }, |
2ef01793 | 318 | [sa56004] = { |
a095f687 | 319 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
320 | .alert_alarms = 0x7b, |
321 | .max_convrate = 9, | |
322 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
323 | }, | |
1daaceb2 WN |
324 | [tmp451] = { |
325 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
326 | | LM90_HAVE_BROKEN_ALERT, | |
327 | .alert_alarms = 0x7c, | |
328 | .max_convrate = 9, | |
329 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
330 | } | |
4667bcb8 GR |
331 | }; |
332 | ||
40465d94 WN |
333 | /* |
334 | * TEMP8 register index | |
335 | */ | |
336 | enum lm90_temp8_reg_index { | |
337 | LOCAL_LOW = 0, | |
338 | LOCAL_HIGH, | |
339 | LOCAL_CRIT, | |
340 | REMOTE_CRIT, | |
341 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
342 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
343 | REMOTE2_CRIT, /* max6695/96 only */ | |
344 | REMOTE2_EMERG, /* max6695/96 only */ | |
345 | TEMP8_REG_NUM | |
346 | }; | |
347 | ||
348 | /* | |
349 | * TEMP11 register index | |
350 | */ | |
351 | enum lm90_temp11_reg_index { | |
352 | REMOTE_TEMP = 0, | |
353 | REMOTE_LOW, | |
354 | REMOTE_HIGH, | |
355 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
356 | LOCAL_TEMP, | |
357 | REMOTE2_TEMP, /* max6695/96 only */ | |
358 | REMOTE2_LOW, /* max6695/96 only */ | |
359 | REMOTE2_HIGH, /* max6695/96 only */ | |
360 | TEMP11_REG_NUM | |
361 | }; | |
362 | ||
1da177e4 LT |
363 | /* |
364 | * Client data (each client gets its own) | |
365 | */ | |
366 | ||
367 | struct lm90_data { | |
1beeffe4 | 368 | struct device *hwmon_dev; |
9a61bf63 | 369 | struct mutex update_lock; |
3e0f964f | 370 | struct regulator *regulator; |
1da177e4 LT |
371 | char valid; /* zero until following fields are valid */ |
372 | unsigned long last_updated; /* in jiffies */ | |
373 | int kind; | |
4667bcb8 | 374 | u32 flags; |
1da177e4 | 375 | |
0c01b644 GR |
376 | int update_interval; /* in milliseconds */ |
377 | ||
95238364 | 378 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 379 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
380 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
381 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 382 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 383 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 384 | |
1da177e4 | 385 | /* registers values */ |
40465d94 WN |
386 | s8 temp8[TEMP8_REG_NUM]; |
387 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 388 | u8 temp_hyst; |
06e1c0a2 | 389 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
390 | }; |
391 | ||
15b66ab6 GR |
392 | /* |
393 | * Support functions | |
394 | */ | |
395 | ||
396 | /* | |
397 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
398 | * to explicitly ask for a transaction without PEC. | |
399 | */ | |
400 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
401 | { | |
402 | return i2c_smbus_xfer(client->adapter, client->addr, | |
403 | client->flags & ~I2C_CLIENT_PEC, | |
404 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
405 | } | |
406 | ||
407 | /* | |
408 | * It is assumed that client->update_lock is held (unless we are in | |
409 | * detection or initialization steps). This matters when PEC is enabled, | |
410 | * because we don't want the address pointer to change between the write | |
411 | * byte and the read byte transactions. | |
412 | */ | |
413 | static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value) | |
414 | { | |
415 | int err; | |
416 | ||
417 | if (client->flags & I2C_CLIENT_PEC) { | |
418 | err = adm1032_write_byte(client, reg); | |
419 | if (err >= 0) | |
420 | err = i2c_smbus_read_byte(client); | |
421 | } else | |
422 | err = i2c_smbus_read_byte_data(client, reg); | |
423 | ||
424 | if (err < 0) { | |
425 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
426 | reg, err); | |
427 | return err; | |
428 | } | |
429 | *value = err; | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) | |
435 | { | |
436 | int err; | |
437 | u8 oldh, newh, l; | |
438 | ||
439 | /* | |
440 | * There is a trick here. We have to read two registers to have the | |
441 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 442 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
443 | * the one-shot conversion register, which we don't want to do |
444 | * (disables hardware monitoring) or monitor the busy bit, which is | |
445 | * impossible (we can't read the values and monitor that bit at the | |
446 | * exact same time). So the solution used here is to read the high | |
447 | * byte once, then the low byte, then the high byte again. If the new | |
448 | * high byte matches the old one, then we have a valid reading. Else | |
449 | * we have to read the low byte again, and now we believe we have a | |
450 | * correct reading. | |
451 | */ | |
452 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
453 | || (err = lm90_read_reg(client, regl, &l)) | |
454 | || (err = lm90_read_reg(client, regh, &newh))) | |
455 | return err; | |
456 | if (oldh != newh) { | |
457 | err = lm90_read_reg(client, regl, &l); | |
458 | if (err) | |
459 | return err; | |
460 | } | |
461 | *value = (newh << 8) | l; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | /* | |
467 | * client->update_lock must be held when calling this function (unless we are | |
468 | * in detection or initialization steps), and while a remote channel other | |
469 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
470 | * external channel 0 before releasing the lock. This is necessary because | |
471 | * various registers have different meanings as a result of selecting a | |
472 | * non-default remote channel. | |
473 | */ | |
474 | static inline void lm90_select_remote_channel(struct i2c_client *client, | |
475 | struct lm90_data *data, | |
476 | int channel) | |
477 | { | |
478 | u8 config; | |
479 | ||
480 | if (data->kind == max6696) { | |
481 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
482 | config &= ~0x08; | |
483 | if (channel) | |
484 | config |= 0x08; | |
485 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
486 | config); | |
487 | } | |
488 | } | |
489 | ||
0c01b644 GR |
490 | /* |
491 | * Set conversion rate. | |
492 | * client->update_lock must be held when calling this function (unless we are | |
493 | * in detection or initialization steps). | |
494 | */ | |
495 | static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, | |
496 | unsigned int interval) | |
497 | { | |
498 | int i; | |
499 | unsigned int update_interval; | |
500 | ||
501 | /* Shift calculations to avoid rounding errors */ | |
502 | interval <<= 6; | |
503 | ||
504 | /* find the nearest update rate */ | |
505 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
506 | i < data->max_convrate; i++, update_interval >>= 1) | |
507 | if (interval >= update_interval * 3 / 4) | |
508 | break; | |
509 | ||
510 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); | |
511 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); | |
512 | } | |
513 | ||
15b66ab6 GR |
514 | static struct lm90_data *lm90_update_device(struct device *dev) |
515 | { | |
516 | struct i2c_client *client = to_i2c_client(dev); | |
517 | struct lm90_data *data = i2c_get_clientdata(client); | |
0c01b644 | 518 | unsigned long next_update; |
15b66ab6 GR |
519 | |
520 | mutex_lock(&data->update_lock); | |
521 | ||
78c2c2fe JD |
522 | next_update = data->last_updated + |
523 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 524 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 GR |
525 | u8 h, l; |
526 | u8 alarms; | |
527 | ||
528 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
40465d94 WN |
529 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, |
530 | &data->temp8[LOCAL_LOW]); | |
531 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, | |
532 | &data->temp8[LOCAL_HIGH]); | |
533 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, | |
534 | &data->temp8[LOCAL_CRIT]); | |
535 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
536 | &data->temp8[REMOTE_CRIT]); | |
15b66ab6 GR |
537 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); |
538 | ||
a095f687 | 539 | if (data->reg_local_ext) { |
15b66ab6 | 540 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
2ef01793 | 541 | data->reg_local_ext, |
40465d94 | 542 | &data->temp11[LOCAL_TEMP]); |
15b66ab6 GR |
543 | } else { |
544 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
545 | &h) == 0) | |
40465d94 | 546 | data->temp11[LOCAL_TEMP] = h << 8; |
15b66ab6 GR |
547 | } |
548 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
40465d94 WN |
549 | LM90_REG_R_REMOTE_TEMPL, |
550 | &data->temp11[REMOTE_TEMP]); | |
15b66ab6 GR |
551 | |
552 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { | |
40465d94 | 553 | data->temp11[REMOTE_LOW] = h << 8; |
15b66ab6 GR |
554 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) |
555 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, | |
556 | &l) == 0) | |
40465d94 | 557 | data->temp11[REMOTE_LOW] |= l; |
15b66ab6 GR |
558 | } |
559 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
40465d94 | 560 | data->temp11[REMOTE_HIGH] = h << 8; |
15b66ab6 GR |
561 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) |
562 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, | |
563 | &l) == 0) | |
40465d94 | 564 | data->temp11[REMOTE_HIGH] |= l; |
15b66ab6 GR |
565 | } |
566 | ||
567 | if (data->flags & LM90_HAVE_OFFSET) { | |
568 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, | |
569 | &h) == 0 | |
570 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, | |
571 | &l) == 0) | |
40465d94 | 572 | data->temp11[REMOTE_OFFSET] = (h << 8) | l; |
15b66ab6 GR |
573 | } |
574 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
575 | lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG, | |
40465d94 | 576 | &data->temp8[LOCAL_EMERG]); |
15b66ab6 | 577 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, |
40465d94 | 578 | &data->temp8[REMOTE_EMERG]); |
15b66ab6 GR |
579 | } |
580 | lm90_read_reg(client, LM90_REG_R_STATUS, &alarms); | |
581 | data->alarms = alarms; /* save as 16 bit value */ | |
582 | ||
583 | if (data->kind == max6696) { | |
584 | lm90_select_remote_channel(client, data, 1); | |
585 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
40465d94 | 586 | &data->temp8[REMOTE2_CRIT]); |
15b66ab6 | 587 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, |
40465d94 | 588 | &data->temp8[REMOTE2_EMERG]); |
15b66ab6 | 589 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
40465d94 WN |
590 | LM90_REG_R_REMOTE_TEMPL, |
591 | &data->temp11[REMOTE2_TEMP]); | |
15b66ab6 | 592 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h)) |
40465d94 | 593 | data->temp11[REMOTE2_LOW] = h << 8; |
15b66ab6 | 594 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h)) |
40465d94 | 595 | data->temp11[REMOTE2_HIGH] = h << 8; |
15b66ab6 GR |
596 | lm90_select_remote_channel(client, data, 0); |
597 | ||
598 | if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2, | |
599 | &alarms)) | |
600 | data->alarms |= alarms << 8; | |
601 | } | |
602 | ||
f36ffeab GR |
603 | /* |
604 | * Re-enable ALERT# output if it was originally enabled and | |
605 | * relevant alarms are all clear | |
606 | */ | |
15b66ab6 GR |
607 | if ((data->config_orig & 0x80) == 0 |
608 | && (data->alarms & data->alert_alarms) == 0) { | |
609 | u8 config; | |
610 | ||
611 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
612 | if (config & 0x80) { | |
613 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); | |
614 | i2c_smbus_write_byte_data(client, | |
615 | LM90_REG_W_CONFIG1, | |
616 | config & ~0x80); | |
617 | } | |
618 | } | |
619 | ||
620 | data->last_updated = jiffies; | |
621 | data->valid = 1; | |
622 | } | |
623 | ||
624 | mutex_unlock(&data->update_lock); | |
625 | ||
626 | return data; | |
627 | } | |
628 | ||
cea50fe2 NC |
629 | /* |
630 | * Conversions | |
631 | * For local temperatures and limits, critical limits and the hysteresis | |
632 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
633 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
634 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
635 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
636 | */ |
637 | ||
9d4d3834 | 638 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
639 | { |
640 | return val * 1000; | |
641 | } | |
642 | ||
271dabf5 BH |
643 | static inline int temp_from_u8(u8 val) |
644 | { | |
645 | return val * 1000; | |
646 | } | |
647 | ||
9d4d3834 | 648 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
649 | { |
650 | return val / 32 * 125; | |
651 | } | |
652 | ||
271dabf5 BH |
653 | static inline int temp_from_u16(u16 val) |
654 | { | |
655 | return val / 32 * 125; | |
656 | } | |
657 | ||
9d4d3834 | 658 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
659 | { |
660 | if (val <= -128000) | |
661 | return -128; | |
662 | if (val >= 127000) | |
663 | return 127; | |
664 | if (val < 0) | |
665 | return (val - 500) / 1000; | |
666 | return (val + 500) / 1000; | |
667 | } | |
668 | ||
271dabf5 BH |
669 | static u8 temp_to_u8(long val) |
670 | { | |
671 | if (val <= 0) | |
672 | return 0; | |
673 | if (val >= 255000) | |
674 | return 255; | |
675 | return (val + 500) / 1000; | |
676 | } | |
677 | ||
9d4d3834 | 678 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
679 | { |
680 | if (val <= -128000) | |
681 | return 0x8000; | |
682 | if (val >= 127875) | |
683 | return 0x7FE0; | |
684 | if (val < 0) | |
685 | return (val - 62) / 125 * 32; | |
686 | return (val + 62) / 125 * 32; | |
687 | } | |
688 | ||
689 | static u8 hyst_to_reg(long val) | |
690 | { | |
691 | if (val <= 0) | |
692 | return 0; | |
693 | if (val >= 30500) | |
694 | return 31; | |
695 | return (val + 500) / 1000; | |
696 | } | |
697 | ||
698 | /* | |
23b2d477 NC |
699 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
700 | * attempts to write values that are outside the range 0 < temp < 127 are | |
701 | * treated as the boundary value. | |
702 | * | |
703 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
704 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 705 | */ |
9d4d3834 | 706 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 707 | { |
23b2d477 NC |
708 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
709 | return (val - 64) * 1000; | |
710 | else | |
9d4d3834 | 711 | return temp_from_s8(val); |
cea50fe2 NC |
712 | } |
713 | ||
9d4d3834 | 714 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 715 | { |
23b2d477 NC |
716 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
717 | return (val - 0x4000) / 64 * 250; | |
718 | else | |
9d4d3834 | 719 | return temp_from_s16(val); |
23b2d477 NC |
720 | } |
721 | ||
9d4d3834 | 722 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
723 | { |
724 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
725 | if (val <= -64000) | |
726 | return 0; | |
727 | if (val >= 191000) | |
728 | return 0xFF; | |
729 | return (val + 500 + 64000) / 1000; | |
730 | } else { | |
731 | if (val <= 0) | |
732 | return 0; | |
733 | if (val >= 127000) | |
734 | return 127; | |
735 | return (val + 500) / 1000; | |
736 | } | |
737 | } | |
738 | ||
9d4d3834 | 739 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
740 | { |
741 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
742 | if (val <= -64000) | |
743 | return 0; | |
744 | if (val >= 191750) | |
745 | return 0xFFC0; | |
746 | return (val + 64000 + 125) / 250 * 64; | |
747 | } else { | |
748 | if (val <= 0) | |
749 | return 0; | |
750 | if (val >= 127750) | |
751 | return 0x7FC0; | |
752 | return (val + 125) / 250 * 64; | |
753 | } | |
cea50fe2 NC |
754 | } |
755 | ||
1da177e4 LT |
756 | /* |
757 | * Sysfs stuff | |
758 | */ | |
759 | ||
30d7394b JD |
760 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
761 | char *buf) | |
762 | { | |
763 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
764 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
765 | int temp; |
766 | ||
1daaceb2 | 767 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 768 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
769 | else if (data->kind == max6646) |
770 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 771 | else |
9d4d3834 | 772 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 773 | |
97ae60bb JD |
774 | /* +16 degrees offset for temp2 for the LM99 */ |
775 | if (data->kind == lm99 && attr->index == 3) | |
776 | temp += 16000; | |
777 | ||
23b2d477 | 778 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
779 | } |
780 | ||
781 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
782 | const char *buf, size_t count) | |
783 | { | |
40465d94 | 784 | static const u8 reg[TEMP8_REG_NUM] = { |
30d7394b JD |
785 | LM90_REG_W_LOCAL_LOW, |
786 | LM90_REG_W_LOCAL_HIGH, | |
787 | LM90_REG_W_LOCAL_CRIT, | |
788 | LM90_REG_W_REMOTE_CRIT, | |
6948708d GR |
789 | MAX6659_REG_W_LOCAL_EMERG, |
790 | MAX6659_REG_W_REMOTE_EMERG, | |
06e1c0a2 GR |
791 | LM90_REG_W_REMOTE_CRIT, |
792 | MAX6659_REG_W_REMOTE_EMERG, | |
30d7394b JD |
793 | }; |
794 | ||
795 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
796 | struct i2c_client *client = to_i2c_client(dev); | |
797 | struct lm90_data *data = i2c_get_clientdata(client); | |
30d7394b | 798 | int nr = attr->index; |
11e57812 GR |
799 | long val; |
800 | int err; | |
801 | ||
179c4fdb | 802 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
803 | if (err < 0) |
804 | return err; | |
30d7394b | 805 | |
97ae60bb JD |
806 | /* +16 degrees offset for temp2 for the LM99 */ |
807 | if (data->kind == lm99 && attr->index == 3) | |
808 | val -= 16000; | |
809 | ||
9a61bf63 | 810 | mutex_lock(&data->update_lock); |
1daaceb2 | 811 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 812 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
813 | else if (data->kind == max6646) |
814 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 815 | else |
9d4d3834 | 816 | data->temp8[nr] = temp_to_s8(val); |
06e1c0a2 GR |
817 | |
818 | lm90_select_remote_channel(client, data, nr >= 6); | |
f65e1708 | 819 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
06e1c0a2 GR |
820 | lm90_select_remote_channel(client, data, 0); |
821 | ||
9a61bf63 | 822 | mutex_unlock(&data->update_lock); |
30d7394b | 823 | return count; |
1da177e4 | 824 | } |
30d7394b JD |
825 | |
826 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
827 | char *buf) | |
828 | { | |
96512861 | 829 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b | 830 | struct lm90_data *data = lm90_update_device(dev); |
23b2d477 NC |
831 | int temp; |
832 | ||
1daaceb2 | 833 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 834 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
835 | else if (data->kind == max6646) |
836 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 837 | else |
9d4d3834 | 838 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 839 | |
97ae60bb JD |
840 | /* +16 degrees offset for temp2 for the LM99 */ |
841 | if (data->kind == lm99 && attr->index <= 2) | |
842 | temp += 16000; | |
843 | ||
23b2d477 | 844 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 845 | } |
30d7394b JD |
846 | |
847 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
848 | const char *buf, size_t count) | |
849 | { | |
96512861 GR |
850 | struct { |
851 | u8 high; | |
852 | u8 low; | |
06e1c0a2 GR |
853 | int channel; |
854 | } reg[5] = { | |
855 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 }, | |
856 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 }, | |
857 | { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 }, | |
858 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 }, | |
859 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } | |
30d7394b JD |
860 | }; |
861 | ||
96512861 | 862 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b JD |
863 | struct i2c_client *client = to_i2c_client(dev); |
864 | struct lm90_data *data = i2c_get_clientdata(client); | |
96512861 GR |
865 | int nr = attr->nr; |
866 | int index = attr->index; | |
11e57812 GR |
867 | long val; |
868 | int err; | |
869 | ||
179c4fdb | 870 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
871 | if (err < 0) |
872 | return err; | |
30d7394b | 873 | |
97ae60bb | 874 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 875 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
876 | val -= 16000; |
877 | ||
9a61bf63 | 878 | mutex_lock(&data->update_lock); |
1daaceb2 | 879 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 880 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 881 | else if (data->kind == max6646) |
96512861 | 882 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 883 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 884 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 885 | else |
96512861 | 886 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 887 | |
06e1c0a2 | 888 | lm90_select_remote_channel(client, data, reg[nr].channel); |
96512861 GR |
889 | i2c_smbus_write_byte_data(client, reg[nr].high, |
890 | data->temp11[index] >> 8); | |
88073bb1 | 891 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 GR |
892 | i2c_smbus_write_byte_data(client, reg[nr].low, |
893 | data->temp11[index] & 0xff); | |
06e1c0a2 GR |
894 | lm90_select_remote_channel(client, data, 0); |
895 | ||
9a61bf63 | 896 | mutex_unlock(&data->update_lock); |
30d7394b | 897 | return count; |
1da177e4 | 898 | } |
30d7394b | 899 | |
11e57812 GR |
900 | static ssize_t show_temphyst(struct device *dev, |
901 | struct device_attribute *devattr, | |
30d7394b JD |
902 | char *buf) |
903 | { | |
904 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
905 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
906 | int temp; |
907 | ||
1daaceb2 | 908 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 909 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
910 | else if (data->kind == max6646) |
911 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 912 | else |
9d4d3834 | 913 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 914 | |
97ae60bb JD |
915 | /* +16 degrees offset for temp2 for the LM99 */ |
916 | if (data->kind == lm99 && attr->index == 3) | |
917 | temp += 16000; | |
918 | ||
9d4d3834 | 919 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 920 | } |
1da177e4 | 921 | |
30d7394b JD |
922 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
923 | const char *buf, size_t count) | |
1da177e4 LT |
924 | { |
925 | struct i2c_client *client = to_i2c_client(dev); | |
926 | struct lm90_data *data = i2c_get_clientdata(client); | |
11e57812 GR |
927 | long val; |
928 | int err; | |
ec38fa2b | 929 | int temp; |
1da177e4 | 930 | |
179c4fdb | 931 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
932 | if (err < 0) |
933 | return err; | |
934 | ||
9a61bf63 | 935 | mutex_lock(&data->update_lock); |
1daaceb2 | 936 | if (data->kind == adt7461 || data->kind == tmp451) |
40465d94 | 937 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); |
ec38fa2b | 938 | else if (data->kind == max6646) |
40465d94 | 939 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); |
ec38fa2b | 940 | else |
40465d94 | 941 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); |
ec38fa2b JD |
942 | |
943 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 944 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 945 | data->temp_hyst); |
9a61bf63 | 946 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
947 | return count; |
948 | } | |
949 | ||
30d7394b JD |
950 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
951 | char *buf) | |
1da177e4 LT |
952 | { |
953 | struct lm90_data *data = lm90_update_device(dev); | |
954 | return sprintf(buf, "%d\n", data->alarms); | |
955 | } | |
956 | ||
2d45771e JD |
957 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
958 | *devattr, char *buf) | |
959 | { | |
960 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
961 | struct lm90_data *data = lm90_update_device(dev); | |
962 | int bitnr = attr->index; | |
963 | ||
964 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
965 | } | |
966 | ||
0c01b644 GR |
967 | static ssize_t show_update_interval(struct device *dev, |
968 | struct device_attribute *attr, char *buf) | |
969 | { | |
970 | struct lm90_data *data = dev_get_drvdata(dev); | |
971 | ||
972 | return sprintf(buf, "%u\n", data->update_interval); | |
973 | } | |
974 | ||
975 | static ssize_t set_update_interval(struct device *dev, | |
976 | struct device_attribute *attr, | |
977 | const char *buf, size_t count) | |
978 | { | |
979 | struct i2c_client *client = to_i2c_client(dev); | |
980 | struct lm90_data *data = i2c_get_clientdata(client); | |
981 | unsigned long val; | |
982 | int err; | |
983 | ||
179c4fdb | 984 | err = kstrtoul(buf, 10, &val); |
0c01b644 GR |
985 | if (err) |
986 | return err; | |
987 | ||
988 | mutex_lock(&data->update_lock); | |
2a844c14 | 989 | lm90_set_convrate(client, data, clamp_val(val, 0, 100000)); |
0c01b644 GR |
990 | mutex_unlock(&data->update_lock); |
991 | ||
992 | return count; | |
993 | } | |
994 | ||
40465d94 WN |
995 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, |
996 | 0, LOCAL_TEMP); | |
997 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, | |
998 | 0, REMOTE_TEMP); | |
30d7394b | 999 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1000 | set_temp8, LOCAL_LOW); |
96512861 | 1001 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1002 | set_temp11, 0, REMOTE_LOW); |
30d7394b | 1003 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1004 | set_temp8, LOCAL_HIGH); |
96512861 | 1005 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1006 | set_temp11, 1, REMOTE_HIGH); |
30d7394b | 1007 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1008 | set_temp8, LOCAL_CRIT); |
30d7394b | 1009 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1010 | set_temp8, REMOTE_CRIT); |
30d7394b | 1011 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
40465d94 WN |
1012 | set_temphyst, LOCAL_CRIT); |
1013 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1014 | REMOTE_CRIT); | |
96512861 | 1015 | static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1016 | set_temp11, 2, REMOTE_OFFSET); |
2d45771e JD |
1017 | |
1018 | /* Individual alarm files */ | |
1019 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
1020 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 1021 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
1022 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
1023 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
1024 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
1025 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
1026 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
1027 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1028 | ||
0c01b644 GR |
1029 | static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, |
1030 | set_update_interval); | |
1031 | ||
0e39e01c JD |
1032 | static struct attribute *lm90_attributes[] = { |
1033 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
1034 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
1035 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
1036 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
1037 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
1038 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
1039 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
1040 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
1041 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
1042 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
1043 | ||
1044 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
1045 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 1046 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
1047 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
1048 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
1049 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
1050 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
1051 | &dev_attr_alarms.attr, | |
0c01b644 | 1052 | &dev_attr_update_interval.attr, |
0e39e01c JD |
1053 | NULL |
1054 | }; | |
1055 | ||
1056 | static const struct attribute_group lm90_group = { | |
1057 | .attrs = lm90_attributes, | |
1058 | }; | |
1059 | ||
6948708d GR |
1060 | /* |
1061 | * Additional attributes for devices with emergency sensors | |
1062 | */ | |
1063 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
40465d94 | 1064 | set_temp8, LOCAL_EMERG); |
6948708d | 1065 | static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1066 | set_temp8, REMOTE_EMERG); |
6948708d | 1067 | static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1068 | NULL, LOCAL_EMERG); |
6948708d | 1069 | static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1070 | NULL, REMOTE_EMERG); |
6948708d GR |
1071 | |
1072 | static struct attribute *lm90_emergency_attributes[] = { | |
1073 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, | |
1074 | &sensor_dev_attr_temp2_emergency.dev_attr.attr, | |
1075 | &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr, | |
1076 | &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr, | |
1077 | NULL | |
1078 | }; | |
1079 | ||
1080 | static const struct attribute_group lm90_emergency_group = { | |
1081 | .attrs = lm90_emergency_attributes, | |
1082 | }; | |
1083 | ||
06e1c0a2 GR |
1084 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15); |
1085 | static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1086 | ||
1087 | static struct attribute *lm90_emergency_alarm_attributes[] = { | |
1088 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, | |
1089 | &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, | |
1090 | NULL | |
1091 | }; | |
1092 | ||
1093 | static const struct attribute_group lm90_emergency_alarm_group = { | |
1094 | .attrs = lm90_emergency_alarm_attributes, | |
1095 | }; | |
1096 | ||
1097 | /* | |
1098 | * Additional attributes for devices with 3 temperature sensors | |
1099 | */ | |
40465d94 WN |
1100 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, |
1101 | 0, REMOTE2_TEMP); | |
06e1c0a2 | 1102 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1103 | set_temp11, 3, REMOTE2_LOW); |
06e1c0a2 | 1104 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1105 | set_temp11, 4, REMOTE2_HIGH); |
06e1c0a2 | 1106 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 WN |
1107 | set_temp8, REMOTE2_CRIT); |
1108 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1109 | REMOTE2_CRIT); | |
06e1c0a2 | 1110 | static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1111 | set_temp8, REMOTE2_EMERG); |
06e1c0a2 | 1112 | static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1113 | NULL, REMOTE2_EMERG); |
06e1c0a2 GR |
1114 | |
1115 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
1116 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10); | |
1117 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11); | |
1118 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12); | |
1119 | static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14); | |
1120 | ||
1121 | static struct attribute *lm90_temp3_attributes[] = { | |
1122 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
1123 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
1124 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
1125 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
1126 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
1127 | &sensor_dev_attr_temp3_emergency.dev_attr.attr, | |
1128 | &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr, | |
1129 | ||
1130 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
1131 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
1132 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
1133 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
1134 | &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr, | |
1135 | NULL | |
1136 | }; | |
1137 | ||
1138 | static const struct attribute_group lm90_temp3_group = { | |
1139 | .attrs = lm90_temp3_attributes, | |
1140 | }; | |
1141 | ||
c3df5806 JD |
1142 | /* pec used for ADM1032 only */ |
1143 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
1144 | char *buf) | |
1145 | { | |
1146 | struct i2c_client *client = to_i2c_client(dev); | |
1147 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
1148 | } | |
1149 | ||
1150 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
1151 | const char *buf, size_t count) | |
1152 | { | |
1153 | struct i2c_client *client = to_i2c_client(dev); | |
11e57812 GR |
1154 | long val; |
1155 | int err; | |
1156 | ||
179c4fdb | 1157 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1158 | if (err < 0) |
1159 | return err; | |
c3df5806 JD |
1160 | |
1161 | switch (val) { | |
1162 | case 0: | |
1163 | client->flags &= ~I2C_CLIENT_PEC; | |
1164 | break; | |
1165 | case 1: | |
1166 | client->flags |= I2C_CLIENT_PEC; | |
1167 | break; | |
1168 | default: | |
1169 | return -EINVAL; | |
1170 | } | |
1171 | ||
1172 | return count; | |
1173 | } | |
1174 | ||
1175 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
1176 | ||
1da177e4 LT |
1177 | /* |
1178 | * Real code | |
1179 | */ | |
1180 | ||
15b66ab6 | 1181 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1182 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1183 | struct i2c_board_info *info) |
8256fe0f | 1184 | { |
b2589ab0 JD |
1185 | struct i2c_adapter *adapter = client->adapter; |
1186 | int address = client->addr; | |
15b66ab6 | 1187 | const char *name = NULL; |
b2589ab0 | 1188 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1189 | |
15b66ab6 GR |
1190 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1191 | return -ENODEV; | |
1da177e4 | 1192 | |
8f2fa77c | 1193 | /* detection and identification */ |
b2589ab0 JD |
1194 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1195 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1196 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1197 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1198 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1199 | return -ENODEV; |
1200 | ||
f90be42f | 1201 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1202 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1203 | if (config2 < 0) | |
9b0e8526 | 1204 | return -ENODEV; |
f90be42f | 1205 | } else |
b2589ab0 | 1206 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1207 | |
f90be42f JD |
1208 | if ((address == 0x4C || address == 0x4D) |
1209 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1210 | if ((config1 & 0x2A) == 0x00 |
1211 | && (config2 & 0xF8) == 0x00 | |
1212 | && convrate <= 0x09) { | |
8f2fa77c JD |
1213 | if (address == 0x4C |
1214 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1215 | name = "lm90"; | |
32c82a93 | 1216 | } else |
8f2fa77c JD |
1217 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1218 | name = "lm99"; | |
1219 | dev_info(&adapter->dev, | |
1220 | "Assuming LM99 chip at 0x%02x\n", | |
1221 | address); | |
1222 | dev_info(&adapter->dev, | |
1223 | "If it is an LM89, instantiate it " | |
1224 | "with the new_device sysfs " | |
1225 | "interface\n"); | |
271dabf5 | 1226 | } else |
8f2fa77c JD |
1227 | if (address == 0x4C |
1228 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1229 | name = "lm86"; | |
1da177e4 LT |
1230 | } |
1231 | } | |
8f2fa77c JD |
1232 | } else |
1233 | if ((address == 0x4C || address == 0x4D) | |
1234 | && man_id == 0x41) { /* Analog Devices */ | |
1235 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1236 | && (config1 & 0x3F) == 0x00 |
1237 | && convrate <= 0x0A) { | |
8f2fa77c | 1238 | name = "adm1032"; |
f36ffeab GR |
1239 | /* |
1240 | * The ADM1032 supports PEC, but only if combined | |
1241 | * transactions are not used. | |
1242 | */ | |
8f2fa77c JD |
1243 | if (i2c_check_functionality(adapter, |
1244 | I2C_FUNC_SMBUS_BYTE)) | |
1245 | info->flags |= I2C_CLIENT_PEC; | |
1246 | } else | |
1247 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1248 | && (config1 & 0x1B) == 0x00 |
1249 | && convrate <= 0x0A) { | |
8f2fa77c | 1250 | name = "adt7461"; |
5a4e5e6a GR |
1251 | } else |
1252 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1253 | && (config1 & 0x1B) == 0x00 |
1254 | && convrate <= 0x0A) { | |
5a4e5e6a | 1255 | name = "adt7461a"; |
8f2fa77c JD |
1256 | } |
1257 | } else | |
1258 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1259 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1260 | |
1261 | /* | |
1262 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1263 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1264 | * exists, both readings will reflect the same value. Otherwise, | |
1265 | * the readings will be different. | |
1266 | */ | |
b2589ab0 JD |
1267 | emerg = i2c_smbus_read_byte_data(client, |
1268 | MAX6659_REG_R_REMOTE_EMERG); | |
1269 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1270 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1271 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1272 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1273 | status2 = i2c_smbus_read_byte_data(client, |
1274 | MAX6696_REG_R_STATUS2); | |
1275 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1276 | return -ENODEV; |
1277 | ||
8f2fa77c JD |
1278 | /* |
1279 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1280 | * register. Reading from that address will return the last | |
1281 | * read value, which in our case is those of the man_id | |
1282 | * register. Likewise, the config1 register seems to lack a | |
1283 | * low nibble, so the value will be those of the previous | |
1284 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1285 | * MAX6659 has a third set of upper temperature limit registers. |
1286 | * Those registers also return values on MAX6657 and MAX6658, | |
1287 | * thus the only way to detect MAX6659 is by its address. | |
1288 | * For this reason it will be mis-detected as MAX6657 if its | |
1289 | * address is 0x4C. | |
8f2fa77c JD |
1290 | */ |
1291 | if (chip_id == man_id | |
13c84951 | 1292 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1293 | && (config1 & 0x1F) == (man_id & 0x0F) |
1294 | && convrate <= 0x09) { | |
13c84951 GR |
1295 | if (address == 0x4C) |
1296 | name = "max6657"; | |
1297 | else | |
1298 | name = "max6659"; | |
8f2fa77c | 1299 | } else |
06e1c0a2 GR |
1300 | /* |
1301 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1302 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1303 | * register is unused and should return zero when read. Bit 0 of | |
1304 | * the status2 register is unused and should return zero when | |
1305 | * read. | |
1306 | * | |
1307 | * MAX6695 and MAX6696 have an additional set of temperature | |
1308 | * limit registers. We can detect those chips by checking if | |
1309 | * one of those registers exists. | |
1310 | */ | |
1311 | if (chip_id == 0x01 | |
b2589ab0 JD |
1312 | && (config1 & 0x10) == 0x00 |
1313 | && (status2 & 0x01) == 0x00 | |
1314 | && emerg == emerg2 | |
1315 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1316 | name = "max6696"; |
1317 | } else | |
8f2fa77c JD |
1318 | /* |
1319 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1320 | * revision of the chip. The lowest bit of the config1 register | |
1321 | * is unused and should return zero when read, so should the | |
1322 | * second to last bit of config1 (software reset). | |
1323 | */ | |
1324 | if (chip_id == 0x01 | |
b2589ab0 JD |
1325 | && (config1 & 0x03) == 0x00 |
1326 | && convrate <= 0x07) { | |
8f2fa77c JD |
1327 | name = "max6680"; |
1328 | } else | |
1329 | /* | |
1330 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1331 | * revision of the chip. The lowest 6 bits of the config1 | |
1332 | * register are unused and should return zero when read. | |
1333 | */ | |
1334 | if (chip_id == 0x59 | |
b2589ab0 JD |
1335 | && (config1 & 0x3f) == 0x00 |
1336 | && convrate <= 0x07) { | |
8f2fa77c | 1337 | name = "max6646"; |
1da177e4 | 1338 | } |
6771ea1f JD |
1339 | } else |
1340 | if (address == 0x4C | |
1341 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1342 | if ((config1 & 0x2A) == 0x00 |
1343 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1344 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1345 | && convrate <= 0x09) { |
c4f99a2b JD |
1346 | name = "w83l771"; |
1347 | } else | |
1348 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1349 | && convrate <= 0x08) { |
c4f99a2b JD |
1350 | name = "w83l771"; |
1351 | } | |
6771ea1f | 1352 | } |
2ef01793 | 1353 | } else |
6d101c58 JD |
1354 | if (address >= 0x48 && address <= 0x4F |
1355 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1356 | if (chip_id == 0x00 |
b2589ab0 JD |
1357 | && (config1 & 0x2A) == 0x00 |
1358 | && (config2 & 0xFE) == 0x00 | |
1359 | && convrate <= 0x09) { | |
2ef01793 SD |
1360 | name = "sa56004"; |
1361 | } | |
ae544f64 GR |
1362 | } else |
1363 | if ((address == 0x4C || address == 0x4D) | |
1364 | && man_id == 0x47) { /* GMT */ | |
1365 | if (chip_id == 0x01 /* G781 */ | |
1366 | && (config1 & 0x3F) == 0x00 | |
1367 | && convrate <= 0x08) | |
1368 | name = "g781"; | |
1daaceb2 WN |
1369 | } else |
1370 | if (address == 0x4C | |
1371 | && man_id == 0x55) { /* Texas Instruments */ | |
1372 | int local_ext; | |
1373 | ||
1374 | local_ext = i2c_smbus_read_byte_data(client, | |
1375 | TMP451_REG_R_LOCAL_TEMPL); | |
1376 | ||
1377 | if (chip_id == 0x00 /* TMP451 */ | |
1378 | && (config1 & 0x1B) == 0x00 | |
1379 | && convrate <= 0x09 | |
1380 | && (local_ext & 0x0F) == 0x00) | |
1381 | name = "tmp451"; | |
1da177e4 LT |
1382 | } |
1383 | ||
8f2fa77c JD |
1384 | if (!name) { /* identification failed */ |
1385 | dev_dbg(&adapter->dev, | |
1386 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1387 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1388 | return -ENODEV; | |
1da177e4 | 1389 | } |
8f2fa77c | 1390 | |
9b0e8526 JD |
1391 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
b6fc1bac GR |
1396 | static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data) |
1397 | { | |
b2589ab0 JD |
1398 | struct device *dev = &client->dev; |
1399 | ||
06e1c0a2 | 1400 | if (data->flags & LM90_HAVE_TEMP3) |
b2589ab0 | 1401 | sysfs_remove_group(&dev->kobj, &lm90_temp3_group); |
06e1c0a2 | 1402 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) |
b2589ab0 | 1403 | sysfs_remove_group(&dev->kobj, &lm90_emergency_alarm_group); |
6948708d | 1404 | if (data->flags & LM90_HAVE_EMERGENCY) |
b2589ab0 | 1405 | sysfs_remove_group(&dev->kobj, &lm90_emergency_group); |
b6fc1bac | 1406 | if (data->flags & LM90_HAVE_OFFSET) |
b2589ab0 JD |
1407 | device_remove_file(dev, &sensor_dev_attr_temp2_offset.dev_attr); |
1408 | device_remove_file(dev, &dev_attr_pec); | |
1409 | sysfs_remove_group(&dev->kobj, &lm90_group); | |
b6fc1bac GR |
1410 | } |
1411 | ||
f7001bb0 GR |
1412 | static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data) |
1413 | { | |
1414 | /* Restore initial configuration */ | |
1415 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1416 | data->convrate_orig); | |
1417 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1418 | data->config_orig); | |
1419 | } | |
1420 | ||
15b66ab6 GR |
1421 | static void lm90_init_client(struct i2c_client *client) |
1422 | { | |
0c01b644 | 1423 | u8 config, convrate; |
15b66ab6 GR |
1424 | struct lm90_data *data = i2c_get_clientdata(client); |
1425 | ||
0c01b644 GR |
1426 | if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) { |
1427 | dev_warn(&client->dev, "Failed to read convrate register!\n"); | |
1428 | convrate = LM90_DEF_CONVRATE_RVAL; | |
1429 | } | |
1430 | data->convrate_orig = convrate; | |
1431 | ||
15b66ab6 GR |
1432 | /* |
1433 | * Start the conversions. | |
1434 | */ | |
0c01b644 | 1435 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
15b66ab6 GR |
1436 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
1437 | dev_warn(&client->dev, "Initialization failed!\n"); | |
1438 | return; | |
1439 | } | |
1440 | data->config_orig = config; | |
1441 | ||
1442 | /* Check Temperature Range Select */ | |
1daaceb2 | 1443 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1444 | if (config & 0x04) |
1445 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1450 | * 0.125 degree resolution) and range (0x08, extend range | |
1451 | * to -64 degree) mode for the remote temperature sensor. | |
1452 | */ | |
1453 | if (data->kind == max6680) | |
1454 | config |= 0x18; | |
1455 | ||
1456 | /* | |
1457 | * Select external channel 0 for max6695/96 | |
1458 | */ | |
1459 | if (data->kind == max6696) | |
1460 | config &= ~0x08; | |
1461 | ||
1462 | config &= 0xBF; /* run */ | |
1463 | if (config != data->config_orig) /* Only write if changed */ | |
1464 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1465 | } | |
1466 | ||
072de496 WN |
1467 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1468 | { | |
1469 | struct lm90_data *data = i2c_get_clientdata(client); | |
1470 | u8 st, st2 = 0; | |
1471 | ||
1472 | lm90_read_reg(client, LM90_REG_R_STATUS, &st); | |
1473 | ||
1474 | if (data->kind == max6696) | |
1475 | lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2); | |
1476 | ||
1477 | *status = st | (st2 << 8); | |
1478 | ||
1479 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1480 | return false; | |
1481 | ||
1482 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1483 | (st2 & MAX6696_STATUS2_LOT2)) | |
1484 | dev_warn(&client->dev, | |
1485 | "temp%d out of range, please check!\n", 1); | |
1486 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1487 | (st2 & MAX6696_STATUS2_ROT2)) | |
1488 | dev_warn(&client->dev, | |
1489 | "temp%d out of range, please check!\n", 2); | |
1490 | if (st & LM90_STATUS_ROPEN) | |
1491 | dev_warn(&client->dev, | |
1492 | "temp%d diode open, please check!\n", 2); | |
1493 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1494 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1495 | dev_warn(&client->dev, | |
1496 | "temp%d out of range, please check!\n", 3); | |
1497 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1498 | dev_warn(&client->dev, | |
1499 | "temp%d diode open, please check!\n", 3); | |
1500 | ||
1501 | return true; | |
1502 | } | |
1503 | ||
109b1283 WN |
1504 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1505 | { | |
1506 | struct i2c_client *client = dev_id; | |
1507 | u16 status; | |
1508 | ||
1509 | if (lm90_is_tripped(client, &status)) | |
1510 | return IRQ_HANDLED; | |
1511 | else | |
1512 | return IRQ_NONE; | |
1513 | } | |
1514 | ||
b2589ab0 | 1515 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1516 | const struct i2c_device_id *id) |
1517 | { | |
b2589ab0 JD |
1518 | struct device *dev = &client->dev; |
1519 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
9b0e8526 | 1520 | struct lm90_data *data; |
3e0f964f | 1521 | struct regulator *regulator; |
9b0e8526 | 1522 | int err; |
1da177e4 | 1523 | |
3e0f964f WN |
1524 | regulator = devm_regulator_get(dev, "vcc"); |
1525 | if (IS_ERR(regulator)) | |
1526 | return PTR_ERR(regulator); | |
1527 | ||
1528 | err = regulator_enable(regulator); | |
1529 | if (err < 0) { | |
1530 | dev_err(&client->dev, | |
1531 | "Failed to enable regulator: %d\n", err); | |
1532 | return err; | |
1533 | } | |
1534 | ||
20f426ff GR |
1535 | data = devm_kzalloc(&client->dev, sizeof(struct lm90_data), GFP_KERNEL); |
1536 | if (!data) | |
1537 | return -ENOMEM; | |
1538 | ||
b2589ab0 | 1539 | i2c_set_clientdata(client, data); |
9a61bf63 | 1540 | mutex_init(&data->update_lock); |
1da177e4 | 1541 | |
3e0f964f WN |
1542 | data->regulator = regulator; |
1543 | ||
9b0e8526 JD |
1544 | /* Set the device type */ |
1545 | data->kind = id->driver_data; | |
1546 | if (data->kind == adm1032) { | |
1547 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1548 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1549 | } |
1da177e4 | 1550 | |
f36ffeab GR |
1551 | /* |
1552 | * Different devices have different alarm bits triggering the | |
1553 | * ALERT# output | |
1554 | */ | |
4667bcb8 | 1555 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1556 | |
88073bb1 | 1557 | /* Set chip capabilities */ |
4667bcb8 | 1558 | data->flags = lm90_params[data->kind].flags; |
a095f687 | 1559 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1560 | |
0c01b644 GR |
1561 | /* Set maximum conversion rate */ |
1562 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1563 | ||
1da177e4 | 1564 | /* Initialize the LM90 chip */ |
b2589ab0 | 1565 | lm90_init_client(client); |
1da177e4 LT |
1566 | |
1567 | /* Register sysfs hooks */ | |
b2589ab0 | 1568 | err = sysfs_create_group(&dev->kobj, &lm90_group); |
11e57812 | 1569 | if (err) |
f7001bb0 | 1570 | goto exit_restore; |
b2589ab0 JD |
1571 | if (client->flags & I2C_CLIENT_PEC) { |
1572 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1573 | if (err) |
0e39e01c JD |
1574 | goto exit_remove_files; |
1575 | } | |
88073bb1 | 1576 | if (data->flags & LM90_HAVE_OFFSET) { |
b2589ab0 | 1577 | err = device_create_file(dev, |
11e57812 GR |
1578 | &sensor_dev_attr_temp2_offset.dev_attr); |
1579 | if (err) | |
69f2f96d JD |
1580 | goto exit_remove_files; |
1581 | } | |
6948708d | 1582 | if (data->flags & LM90_HAVE_EMERGENCY) { |
b2589ab0 | 1583 | err = sysfs_create_group(&dev->kobj, &lm90_emergency_group); |
6948708d GR |
1584 | if (err) |
1585 | goto exit_remove_files; | |
1586 | } | |
06e1c0a2 | 1587 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { |
b2589ab0 | 1588 | err = sysfs_create_group(&dev->kobj, |
06e1c0a2 GR |
1589 | &lm90_emergency_alarm_group); |
1590 | if (err) | |
1591 | goto exit_remove_files; | |
1592 | } | |
1593 | if (data->flags & LM90_HAVE_TEMP3) { | |
b2589ab0 | 1594 | err = sysfs_create_group(&dev->kobj, &lm90_temp3_group); |
06e1c0a2 GR |
1595 | if (err) |
1596 | goto exit_remove_files; | |
1597 | } | |
0e39e01c | 1598 | |
b2589ab0 | 1599 | data->hwmon_dev = hwmon_device_register(dev); |
1beeffe4 TJ |
1600 | if (IS_ERR(data->hwmon_dev)) { |
1601 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 1602 | goto exit_remove_files; |
943b0830 MH |
1603 | } |
1604 | ||
109b1283 WN |
1605 | if (client->irq) { |
1606 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1607 | err = devm_request_threaded_irq(dev, client->irq, | |
1608 | NULL, lm90_irq_thread, | |
1609 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1610 | "lm90", client); | |
1611 | if (err < 0) { | |
1612 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
3d489ac0 | 1613 | goto exit_unregister; |
109b1283 WN |
1614 | } |
1615 | } | |
1616 | ||
1da177e4 LT |
1617 | return 0; |
1618 | ||
3d489ac0 GR |
1619 | exit_unregister: |
1620 | hwmon_device_unregister(data->hwmon_dev); | |
0e39e01c | 1621 | exit_remove_files: |
b2589ab0 | 1622 | lm90_remove_files(client, data); |
f7001bb0 GR |
1623 | exit_restore: |
1624 | lm90_restore_conf(client, data); | |
3e0f964f WN |
1625 | regulator_disable(data->regulator); |
1626 | ||
1da177e4 LT |
1627 | return err; |
1628 | } | |
1629 | ||
9b0e8526 | 1630 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 1631 | { |
943b0830 | 1632 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 1633 | |
1beeffe4 | 1634 | hwmon_device_unregister(data->hwmon_dev); |
b6fc1bac | 1635 | lm90_remove_files(client, data); |
f7001bb0 | 1636 | lm90_restore_conf(client, data); |
3e0f964f | 1637 | regulator_disable(data->regulator); |
95238364 | 1638 | |
1da177e4 LT |
1639 | return 0; |
1640 | } | |
1641 | ||
53de3342 JD |
1642 | static void lm90_alert(struct i2c_client *client, unsigned int flag) |
1643 | { | |
072de496 | 1644 | u16 alarms; |
06e1c0a2 | 1645 | |
072de496 | 1646 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1647 | /* |
1648 | * Disable ALERT# output, because these chips don't implement | |
1649 | * SMBus alert correctly; they should only hold the alert line | |
1650 | * low briefly. | |
1651 | */ | |
072de496 WN |
1652 | struct lm90_data *data = i2c_get_clientdata(client); |
1653 | ||
1179324c | 1654 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) |
53de3342 | 1655 | && (alarms & data->alert_alarms)) { |
072de496 | 1656 | u8 config; |
53de3342 JD |
1657 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
1658 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
1659 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1660 | config | 0x80); | |
1661 | } | |
072de496 WN |
1662 | } else { |
1663 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1664 | } |
1665 | } | |
1666 | ||
15b66ab6 GR |
1667 | static struct i2c_driver lm90_driver = { |
1668 | .class = I2C_CLASS_HWMON, | |
1669 | .driver = { | |
1670 | .name = "lm90", | |
1671 | }, | |
1672 | .probe = lm90_probe, | |
1673 | .remove = lm90_remove, | |
1674 | .alert = lm90_alert, | |
1675 | .id_table = lm90_id, | |
1676 | .detect = lm90_detect, | |
1677 | .address_list = normal_i2c, | |
1678 | }; | |
1da177e4 | 1679 | |
f0967eea | 1680 | module_i2c_driver(lm90_driver); |
1da177e4 | 1681 | |
7c81c60f | 1682 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1683 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1684 | MODULE_LICENSE("GPL"); |