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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 { | |
1de8b250 | 368 | struct i2c_client *client; |
1beeffe4 | 369 | struct device *hwmon_dev; |
084489e6 | 370 | const struct attribute_group *groups[6]; |
9a61bf63 | 371 | struct mutex update_lock; |
3e0f964f | 372 | struct regulator *regulator; |
1da177e4 LT |
373 | char valid; /* zero until following fields are valid */ |
374 | unsigned long last_updated; /* in jiffies */ | |
375 | int kind; | |
4667bcb8 | 376 | u32 flags; |
1da177e4 | 377 | |
38bab98a | 378 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 379 | |
95238364 | 380 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 381 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
382 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
383 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 384 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 385 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 386 | |
1da177e4 | 387 | /* registers values */ |
40465d94 WN |
388 | s8 temp8[TEMP8_REG_NUM]; |
389 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 390 | u8 temp_hyst; |
06e1c0a2 | 391 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
392 | }; |
393 | ||
15b66ab6 GR |
394 | /* |
395 | * Support functions | |
396 | */ | |
397 | ||
398 | /* | |
399 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
400 | * to explicitly ask for a transaction without PEC. | |
401 | */ | |
402 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
403 | { | |
404 | return i2c_smbus_xfer(client->adapter, client->addr, | |
405 | client->flags & ~I2C_CLIENT_PEC, | |
406 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
407 | } | |
408 | ||
409 | /* | |
410 | * It is assumed that client->update_lock is held (unless we are in | |
411 | * detection or initialization steps). This matters when PEC is enabled, | |
412 | * because we don't want the address pointer to change between the write | |
413 | * byte and the read byte transactions. | |
414 | */ | |
415 | static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value) | |
416 | { | |
417 | int err; | |
418 | ||
419 | if (client->flags & I2C_CLIENT_PEC) { | |
420 | err = adm1032_write_byte(client, reg); | |
421 | if (err >= 0) | |
422 | err = i2c_smbus_read_byte(client); | |
423 | } else | |
424 | err = i2c_smbus_read_byte_data(client, reg); | |
425 | ||
426 | if (err < 0) { | |
427 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
428 | reg, err); | |
429 | return err; | |
430 | } | |
431 | *value = err; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) | |
437 | { | |
438 | int err; | |
439 | u8 oldh, newh, l; | |
440 | ||
441 | /* | |
442 | * There is a trick here. We have to read two registers to have the | |
443 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 444 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
445 | * the one-shot conversion register, which we don't want to do |
446 | * (disables hardware monitoring) or monitor the busy bit, which is | |
447 | * impossible (we can't read the values and monitor that bit at the | |
448 | * exact same time). So the solution used here is to read the high | |
449 | * byte once, then the low byte, then the high byte again. If the new | |
450 | * high byte matches the old one, then we have a valid reading. Else | |
451 | * we have to read the low byte again, and now we believe we have a | |
452 | * correct reading. | |
453 | */ | |
454 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
455 | || (err = lm90_read_reg(client, regl, &l)) | |
456 | || (err = lm90_read_reg(client, regh, &newh))) | |
457 | return err; | |
458 | if (oldh != newh) { | |
459 | err = lm90_read_reg(client, regl, &l); | |
460 | if (err) | |
461 | return err; | |
462 | } | |
463 | *value = (newh << 8) | l; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * client->update_lock must be held when calling this function (unless we are | |
470 | * in detection or initialization steps), and while a remote channel other | |
471 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
472 | * external channel 0 before releasing the lock. This is necessary because | |
473 | * various registers have different meanings as a result of selecting a | |
474 | * non-default remote channel. | |
475 | */ | |
476 | static inline void lm90_select_remote_channel(struct i2c_client *client, | |
477 | struct lm90_data *data, | |
478 | int channel) | |
479 | { | |
480 | u8 config; | |
481 | ||
482 | if (data->kind == max6696) { | |
483 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
484 | config &= ~0x08; | |
485 | if (channel) | |
486 | config |= 0x08; | |
487 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
488 | config); | |
489 | } | |
490 | } | |
491 | ||
0c01b644 GR |
492 | /* |
493 | * Set conversion rate. | |
494 | * client->update_lock must be held when calling this function (unless we are | |
495 | * in detection or initialization steps). | |
496 | */ | |
497 | static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, | |
498 | unsigned int interval) | |
499 | { | |
500 | int i; | |
501 | unsigned int update_interval; | |
502 | ||
503 | /* Shift calculations to avoid rounding errors */ | |
504 | interval <<= 6; | |
505 | ||
506 | /* find the nearest update rate */ | |
507 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
508 | i < data->max_convrate; i++, update_interval >>= 1) | |
509 | if (interval >= update_interval * 3 / 4) | |
510 | break; | |
511 | ||
512 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); | |
513 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); | |
514 | } | |
515 | ||
15b66ab6 GR |
516 | static struct lm90_data *lm90_update_device(struct device *dev) |
517 | { | |
1de8b250 GR |
518 | struct lm90_data *data = dev_get_drvdata(dev); |
519 | struct i2c_client *client = data->client; | |
0c01b644 | 520 | unsigned long next_update; |
15b66ab6 GR |
521 | |
522 | mutex_lock(&data->update_lock); | |
523 | ||
78c2c2fe JD |
524 | next_update = data->last_updated + |
525 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 526 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 GR |
527 | u8 h, l; |
528 | u8 alarms; | |
529 | ||
530 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
40465d94 WN |
531 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, |
532 | &data->temp8[LOCAL_LOW]); | |
533 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, | |
534 | &data->temp8[LOCAL_HIGH]); | |
535 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, | |
536 | &data->temp8[LOCAL_CRIT]); | |
537 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
538 | &data->temp8[REMOTE_CRIT]); | |
15b66ab6 GR |
539 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); |
540 | ||
a095f687 | 541 | if (data->reg_local_ext) { |
15b66ab6 | 542 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
2ef01793 | 543 | data->reg_local_ext, |
40465d94 | 544 | &data->temp11[LOCAL_TEMP]); |
15b66ab6 GR |
545 | } else { |
546 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
547 | &h) == 0) | |
40465d94 | 548 | data->temp11[LOCAL_TEMP] = h << 8; |
15b66ab6 GR |
549 | } |
550 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
40465d94 WN |
551 | LM90_REG_R_REMOTE_TEMPL, |
552 | &data->temp11[REMOTE_TEMP]); | |
15b66ab6 GR |
553 | |
554 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { | |
40465d94 | 555 | data->temp11[REMOTE_LOW] = h << 8; |
15b66ab6 GR |
556 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) |
557 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, | |
558 | &l) == 0) | |
40465d94 | 559 | data->temp11[REMOTE_LOW] |= l; |
15b66ab6 GR |
560 | } |
561 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
40465d94 | 562 | data->temp11[REMOTE_HIGH] = h << 8; |
15b66ab6 GR |
563 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) |
564 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, | |
565 | &l) == 0) | |
40465d94 | 566 | data->temp11[REMOTE_HIGH] |= l; |
15b66ab6 GR |
567 | } |
568 | ||
569 | if (data->flags & LM90_HAVE_OFFSET) { | |
570 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, | |
571 | &h) == 0 | |
572 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, | |
573 | &l) == 0) | |
40465d94 | 574 | data->temp11[REMOTE_OFFSET] = (h << 8) | l; |
15b66ab6 GR |
575 | } |
576 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
577 | lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG, | |
40465d94 | 578 | &data->temp8[LOCAL_EMERG]); |
15b66ab6 | 579 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, |
40465d94 | 580 | &data->temp8[REMOTE_EMERG]); |
15b66ab6 GR |
581 | } |
582 | lm90_read_reg(client, LM90_REG_R_STATUS, &alarms); | |
583 | data->alarms = alarms; /* save as 16 bit value */ | |
584 | ||
585 | if (data->kind == max6696) { | |
586 | lm90_select_remote_channel(client, data, 1); | |
587 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
40465d94 | 588 | &data->temp8[REMOTE2_CRIT]); |
15b66ab6 | 589 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, |
40465d94 | 590 | &data->temp8[REMOTE2_EMERG]); |
15b66ab6 | 591 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
40465d94 WN |
592 | LM90_REG_R_REMOTE_TEMPL, |
593 | &data->temp11[REMOTE2_TEMP]); | |
15b66ab6 | 594 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h)) |
40465d94 | 595 | data->temp11[REMOTE2_LOW] = h << 8; |
15b66ab6 | 596 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h)) |
40465d94 | 597 | data->temp11[REMOTE2_HIGH] = h << 8; |
15b66ab6 GR |
598 | lm90_select_remote_channel(client, data, 0); |
599 | ||
600 | if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2, | |
601 | &alarms)) | |
602 | data->alarms |= alarms << 8; | |
603 | } | |
604 | ||
f36ffeab GR |
605 | /* |
606 | * Re-enable ALERT# output if it was originally enabled and | |
607 | * relevant alarms are all clear | |
608 | */ | |
15b66ab6 GR |
609 | if ((data->config_orig & 0x80) == 0 |
610 | && (data->alarms & data->alert_alarms) == 0) { | |
611 | u8 config; | |
612 | ||
613 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
614 | if (config & 0x80) { | |
615 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); | |
616 | i2c_smbus_write_byte_data(client, | |
617 | LM90_REG_W_CONFIG1, | |
618 | config & ~0x80); | |
619 | } | |
620 | } | |
621 | ||
622 | data->last_updated = jiffies; | |
623 | data->valid = 1; | |
624 | } | |
625 | ||
626 | mutex_unlock(&data->update_lock); | |
627 | ||
628 | return data; | |
629 | } | |
630 | ||
cea50fe2 NC |
631 | /* |
632 | * Conversions | |
633 | * For local temperatures and limits, critical limits and the hysteresis | |
634 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
635 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
636 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
637 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
638 | */ |
639 | ||
9d4d3834 | 640 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
641 | { |
642 | return val * 1000; | |
643 | } | |
644 | ||
271dabf5 BH |
645 | static inline int temp_from_u8(u8 val) |
646 | { | |
647 | return val * 1000; | |
648 | } | |
649 | ||
9d4d3834 | 650 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
651 | { |
652 | return val / 32 * 125; | |
653 | } | |
654 | ||
271dabf5 BH |
655 | static inline int temp_from_u16(u16 val) |
656 | { | |
657 | return val / 32 * 125; | |
658 | } | |
659 | ||
9d4d3834 | 660 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
661 | { |
662 | if (val <= -128000) | |
663 | return -128; | |
664 | if (val >= 127000) | |
665 | return 127; | |
666 | if (val < 0) | |
667 | return (val - 500) / 1000; | |
668 | return (val + 500) / 1000; | |
669 | } | |
670 | ||
271dabf5 BH |
671 | static u8 temp_to_u8(long val) |
672 | { | |
673 | if (val <= 0) | |
674 | return 0; | |
675 | if (val >= 255000) | |
676 | return 255; | |
677 | return (val + 500) / 1000; | |
678 | } | |
679 | ||
9d4d3834 | 680 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
681 | { |
682 | if (val <= -128000) | |
683 | return 0x8000; | |
684 | if (val >= 127875) | |
685 | return 0x7FE0; | |
686 | if (val < 0) | |
687 | return (val - 62) / 125 * 32; | |
688 | return (val + 62) / 125 * 32; | |
689 | } | |
690 | ||
691 | static u8 hyst_to_reg(long val) | |
692 | { | |
693 | if (val <= 0) | |
694 | return 0; | |
695 | if (val >= 30500) | |
696 | return 31; | |
697 | return (val + 500) / 1000; | |
698 | } | |
699 | ||
700 | /* | |
23b2d477 NC |
701 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
702 | * attempts to write values that are outside the range 0 < temp < 127 are | |
703 | * treated as the boundary value. | |
704 | * | |
705 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
706 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 707 | */ |
9d4d3834 | 708 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 709 | { |
23b2d477 NC |
710 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
711 | return (val - 64) * 1000; | |
712 | else | |
9d4d3834 | 713 | return temp_from_s8(val); |
cea50fe2 NC |
714 | } |
715 | ||
9d4d3834 | 716 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 717 | { |
23b2d477 NC |
718 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
719 | return (val - 0x4000) / 64 * 250; | |
720 | else | |
9d4d3834 | 721 | return temp_from_s16(val); |
23b2d477 NC |
722 | } |
723 | ||
9d4d3834 | 724 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
725 | { |
726 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
727 | if (val <= -64000) | |
728 | return 0; | |
729 | if (val >= 191000) | |
730 | return 0xFF; | |
731 | return (val + 500 + 64000) / 1000; | |
732 | } else { | |
733 | if (val <= 0) | |
734 | return 0; | |
735 | if (val >= 127000) | |
736 | return 127; | |
737 | return (val + 500) / 1000; | |
738 | } | |
739 | } | |
740 | ||
9d4d3834 | 741 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
742 | { |
743 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
744 | if (val <= -64000) | |
745 | return 0; | |
746 | if (val >= 191750) | |
747 | return 0xFFC0; | |
748 | return (val + 64000 + 125) / 250 * 64; | |
749 | } else { | |
750 | if (val <= 0) | |
751 | return 0; | |
752 | if (val >= 127750) | |
753 | return 0x7FC0; | |
754 | return (val + 125) / 250 * 64; | |
755 | } | |
cea50fe2 NC |
756 | } |
757 | ||
1da177e4 LT |
758 | /* |
759 | * Sysfs stuff | |
760 | */ | |
761 | ||
30d7394b JD |
762 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
763 | char *buf) | |
764 | { | |
765 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
766 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
767 | int temp; |
768 | ||
1daaceb2 | 769 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 770 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
771 | else if (data->kind == max6646) |
772 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 773 | else |
9d4d3834 | 774 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 775 | |
97ae60bb JD |
776 | /* +16 degrees offset for temp2 for the LM99 */ |
777 | if (data->kind == lm99 && attr->index == 3) | |
778 | temp += 16000; | |
779 | ||
23b2d477 | 780 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
781 | } |
782 | ||
783 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
784 | const char *buf, size_t count) | |
785 | { | |
40465d94 | 786 | static const u8 reg[TEMP8_REG_NUM] = { |
30d7394b JD |
787 | LM90_REG_W_LOCAL_LOW, |
788 | LM90_REG_W_LOCAL_HIGH, | |
789 | LM90_REG_W_LOCAL_CRIT, | |
790 | LM90_REG_W_REMOTE_CRIT, | |
6948708d GR |
791 | MAX6659_REG_W_LOCAL_EMERG, |
792 | MAX6659_REG_W_REMOTE_EMERG, | |
06e1c0a2 GR |
793 | LM90_REG_W_REMOTE_CRIT, |
794 | MAX6659_REG_W_REMOTE_EMERG, | |
30d7394b JD |
795 | }; |
796 | ||
797 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
1de8b250 GR |
798 | struct lm90_data *data = dev_get_drvdata(dev); |
799 | struct i2c_client *client = data->client; | |
30d7394b | 800 | int nr = attr->index; |
11e57812 GR |
801 | long val; |
802 | int err; | |
803 | ||
179c4fdb | 804 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
805 | if (err < 0) |
806 | return err; | |
30d7394b | 807 | |
97ae60bb JD |
808 | /* +16 degrees offset for temp2 for the LM99 */ |
809 | if (data->kind == lm99 && attr->index == 3) | |
810 | val -= 16000; | |
811 | ||
9a61bf63 | 812 | mutex_lock(&data->update_lock); |
1daaceb2 | 813 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 814 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
815 | else if (data->kind == max6646) |
816 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 817 | else |
9d4d3834 | 818 | data->temp8[nr] = temp_to_s8(val); |
06e1c0a2 GR |
819 | |
820 | lm90_select_remote_channel(client, data, nr >= 6); | |
f65e1708 | 821 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
06e1c0a2 GR |
822 | lm90_select_remote_channel(client, data, 0); |
823 | ||
9a61bf63 | 824 | mutex_unlock(&data->update_lock); |
30d7394b | 825 | return count; |
1da177e4 | 826 | } |
30d7394b JD |
827 | |
828 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
829 | char *buf) | |
830 | { | |
96512861 | 831 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b | 832 | struct lm90_data *data = lm90_update_device(dev); |
23b2d477 NC |
833 | int temp; |
834 | ||
1daaceb2 | 835 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 836 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
837 | else if (data->kind == max6646) |
838 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 839 | else |
9d4d3834 | 840 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 841 | |
97ae60bb JD |
842 | /* +16 degrees offset for temp2 for the LM99 */ |
843 | if (data->kind == lm99 && attr->index <= 2) | |
844 | temp += 16000; | |
845 | ||
23b2d477 | 846 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 847 | } |
30d7394b JD |
848 | |
849 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
850 | const char *buf, size_t count) | |
851 | { | |
96512861 GR |
852 | struct { |
853 | u8 high; | |
854 | u8 low; | |
06e1c0a2 GR |
855 | int channel; |
856 | } reg[5] = { | |
857 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 }, | |
858 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 }, | |
859 | { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 }, | |
860 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 }, | |
861 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } | |
30d7394b JD |
862 | }; |
863 | ||
96512861 | 864 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1de8b250 GR |
865 | struct lm90_data *data = dev_get_drvdata(dev); |
866 | struct i2c_client *client = data->client; | |
96512861 GR |
867 | int nr = attr->nr; |
868 | int index = attr->index; | |
11e57812 GR |
869 | long val; |
870 | int err; | |
871 | ||
179c4fdb | 872 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
873 | if (err < 0) |
874 | return err; | |
30d7394b | 875 | |
97ae60bb | 876 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 877 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
878 | val -= 16000; |
879 | ||
9a61bf63 | 880 | mutex_lock(&data->update_lock); |
1daaceb2 | 881 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 882 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 883 | else if (data->kind == max6646) |
96512861 | 884 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 885 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 886 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 887 | else |
96512861 | 888 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 889 | |
06e1c0a2 | 890 | lm90_select_remote_channel(client, data, reg[nr].channel); |
96512861 GR |
891 | i2c_smbus_write_byte_data(client, reg[nr].high, |
892 | data->temp11[index] >> 8); | |
88073bb1 | 893 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 GR |
894 | i2c_smbus_write_byte_data(client, reg[nr].low, |
895 | data->temp11[index] & 0xff); | |
06e1c0a2 GR |
896 | lm90_select_remote_channel(client, data, 0); |
897 | ||
9a61bf63 | 898 | mutex_unlock(&data->update_lock); |
30d7394b | 899 | return count; |
1da177e4 | 900 | } |
30d7394b | 901 | |
11e57812 GR |
902 | static ssize_t show_temphyst(struct device *dev, |
903 | struct device_attribute *devattr, | |
30d7394b JD |
904 | char *buf) |
905 | { | |
906 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
907 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
908 | int temp; |
909 | ||
1daaceb2 | 910 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 911 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
912 | else if (data->kind == max6646) |
913 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 914 | else |
9d4d3834 | 915 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 916 | |
97ae60bb JD |
917 | /* +16 degrees offset for temp2 for the LM99 */ |
918 | if (data->kind == lm99 && attr->index == 3) | |
919 | temp += 16000; | |
920 | ||
9d4d3834 | 921 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 922 | } |
1da177e4 | 923 | |
30d7394b JD |
924 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
925 | const char *buf, size_t count) | |
1da177e4 | 926 | { |
1de8b250 GR |
927 | struct lm90_data *data = dev_get_drvdata(dev); |
928 | struct i2c_client *client = data->client; | |
11e57812 GR |
929 | long val; |
930 | int err; | |
ec38fa2b | 931 | int temp; |
1da177e4 | 932 | |
179c4fdb | 933 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
934 | if (err < 0) |
935 | return err; | |
936 | ||
9a61bf63 | 937 | mutex_lock(&data->update_lock); |
1daaceb2 | 938 | if (data->kind == adt7461 || data->kind == tmp451) |
40465d94 | 939 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); |
ec38fa2b | 940 | else if (data->kind == max6646) |
40465d94 | 941 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); |
ec38fa2b | 942 | else |
40465d94 | 943 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); |
ec38fa2b JD |
944 | |
945 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 946 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 947 | data->temp_hyst); |
9a61bf63 | 948 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
949 | return count; |
950 | } | |
951 | ||
30d7394b JD |
952 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
953 | char *buf) | |
1da177e4 LT |
954 | { |
955 | struct lm90_data *data = lm90_update_device(dev); | |
956 | return sprintf(buf, "%d\n", data->alarms); | |
957 | } | |
958 | ||
2d45771e JD |
959 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
960 | *devattr, char *buf) | |
961 | { | |
962 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
963 | struct lm90_data *data = lm90_update_device(dev); | |
964 | int bitnr = attr->index; | |
965 | ||
966 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
967 | } | |
968 | ||
0c01b644 GR |
969 | static ssize_t show_update_interval(struct device *dev, |
970 | struct device_attribute *attr, char *buf) | |
971 | { | |
972 | struct lm90_data *data = dev_get_drvdata(dev); | |
973 | ||
974 | return sprintf(buf, "%u\n", data->update_interval); | |
975 | } | |
976 | ||
977 | static ssize_t set_update_interval(struct device *dev, | |
978 | struct device_attribute *attr, | |
979 | const char *buf, size_t count) | |
980 | { | |
1de8b250 GR |
981 | struct lm90_data *data = dev_get_drvdata(dev); |
982 | struct i2c_client *client = data->client; | |
0c01b644 GR |
983 | unsigned long val; |
984 | int err; | |
985 | ||
179c4fdb | 986 | err = kstrtoul(buf, 10, &val); |
0c01b644 GR |
987 | if (err) |
988 | return err; | |
989 | ||
990 | mutex_lock(&data->update_lock); | |
2a844c14 | 991 | lm90_set_convrate(client, data, clamp_val(val, 0, 100000)); |
0c01b644 GR |
992 | mutex_unlock(&data->update_lock); |
993 | ||
994 | return count; | |
995 | } | |
996 | ||
40465d94 WN |
997 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, |
998 | 0, LOCAL_TEMP); | |
999 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, | |
1000 | 0, REMOTE_TEMP); | |
30d7394b | 1001 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1002 | set_temp8, LOCAL_LOW); |
96512861 | 1003 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1004 | set_temp11, 0, REMOTE_LOW); |
30d7394b | 1005 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1006 | set_temp8, LOCAL_HIGH); |
96512861 | 1007 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1008 | set_temp11, 1, REMOTE_HIGH); |
30d7394b | 1009 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1010 | set_temp8, LOCAL_CRIT); |
30d7394b | 1011 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1012 | set_temp8, REMOTE_CRIT); |
30d7394b | 1013 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
40465d94 WN |
1014 | set_temphyst, LOCAL_CRIT); |
1015 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1016 | REMOTE_CRIT); | |
96512861 | 1017 | static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1018 | set_temp11, 2, REMOTE_OFFSET); |
2d45771e JD |
1019 | |
1020 | /* Individual alarm files */ | |
1021 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
1022 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 1023 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
1024 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
1025 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
1026 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
1027 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
1028 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
1029 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1030 | ||
0c01b644 GR |
1031 | static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, |
1032 | set_update_interval); | |
1033 | ||
0e39e01c JD |
1034 | static struct attribute *lm90_attributes[] = { |
1035 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
1036 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
1037 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
1038 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
1039 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
1040 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
1041 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
1042 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
1043 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
1044 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
1045 | ||
1046 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
1047 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 1048 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
1049 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
1050 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
1051 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
1052 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
1053 | &dev_attr_alarms.attr, | |
0c01b644 | 1054 | &dev_attr_update_interval.attr, |
0e39e01c JD |
1055 | NULL |
1056 | }; | |
1057 | ||
1058 | static const struct attribute_group lm90_group = { | |
1059 | .attrs = lm90_attributes, | |
1060 | }; | |
1061 | ||
742192f5 GR |
1062 | static struct attribute *lm90_temp2_offset_attributes[] = { |
1063 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
1064 | NULL | |
1065 | }; | |
1066 | ||
1067 | static const struct attribute_group lm90_temp2_offset_group = { | |
1068 | .attrs = lm90_temp2_offset_attributes, | |
1069 | }; | |
1070 | ||
6948708d GR |
1071 | /* |
1072 | * Additional attributes for devices with emergency sensors | |
1073 | */ | |
1074 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
40465d94 | 1075 | set_temp8, LOCAL_EMERG); |
6948708d | 1076 | static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1077 | set_temp8, REMOTE_EMERG); |
6948708d | 1078 | static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1079 | NULL, LOCAL_EMERG); |
6948708d | 1080 | static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1081 | NULL, REMOTE_EMERG); |
6948708d GR |
1082 | |
1083 | static struct attribute *lm90_emergency_attributes[] = { | |
1084 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, | |
1085 | &sensor_dev_attr_temp2_emergency.dev_attr.attr, | |
1086 | &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr, | |
1087 | &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr, | |
1088 | NULL | |
1089 | }; | |
1090 | ||
1091 | static const struct attribute_group lm90_emergency_group = { | |
1092 | .attrs = lm90_emergency_attributes, | |
1093 | }; | |
1094 | ||
06e1c0a2 GR |
1095 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15); |
1096 | static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1097 | ||
1098 | static struct attribute *lm90_emergency_alarm_attributes[] = { | |
1099 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, | |
1100 | &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, | |
1101 | NULL | |
1102 | }; | |
1103 | ||
1104 | static const struct attribute_group lm90_emergency_alarm_group = { | |
1105 | .attrs = lm90_emergency_alarm_attributes, | |
1106 | }; | |
1107 | ||
1108 | /* | |
1109 | * Additional attributes for devices with 3 temperature sensors | |
1110 | */ | |
40465d94 WN |
1111 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, |
1112 | 0, REMOTE2_TEMP); | |
06e1c0a2 | 1113 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1114 | set_temp11, 3, REMOTE2_LOW); |
06e1c0a2 | 1115 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1116 | set_temp11, 4, REMOTE2_HIGH); |
06e1c0a2 | 1117 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 WN |
1118 | set_temp8, REMOTE2_CRIT); |
1119 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1120 | REMOTE2_CRIT); | |
06e1c0a2 | 1121 | static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1122 | set_temp8, REMOTE2_EMERG); |
06e1c0a2 | 1123 | static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1124 | NULL, REMOTE2_EMERG); |
06e1c0a2 GR |
1125 | |
1126 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
1127 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10); | |
1128 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11); | |
1129 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12); | |
1130 | static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14); | |
1131 | ||
1132 | static struct attribute *lm90_temp3_attributes[] = { | |
1133 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
1134 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
1135 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
1136 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
1137 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
1138 | &sensor_dev_attr_temp3_emergency.dev_attr.attr, | |
1139 | &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr, | |
1140 | ||
1141 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
1142 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
1143 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
1144 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
1145 | &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr, | |
1146 | NULL | |
1147 | }; | |
1148 | ||
1149 | static const struct attribute_group lm90_temp3_group = { | |
1150 | .attrs = lm90_temp3_attributes, | |
1151 | }; | |
1152 | ||
c3df5806 JD |
1153 | /* pec used for ADM1032 only */ |
1154 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
1155 | char *buf) | |
1156 | { | |
1157 | struct i2c_client *client = to_i2c_client(dev); | |
1158 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
1159 | } | |
1160 | ||
1161 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
1162 | const char *buf, size_t count) | |
1163 | { | |
1164 | struct i2c_client *client = to_i2c_client(dev); | |
11e57812 GR |
1165 | long val; |
1166 | int err; | |
1167 | ||
179c4fdb | 1168 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1169 | if (err < 0) |
1170 | return err; | |
c3df5806 JD |
1171 | |
1172 | switch (val) { | |
1173 | case 0: | |
1174 | client->flags &= ~I2C_CLIENT_PEC; | |
1175 | break; | |
1176 | case 1: | |
1177 | client->flags |= I2C_CLIENT_PEC; | |
1178 | break; | |
1179 | default: | |
1180 | return -EINVAL; | |
1181 | } | |
1182 | ||
1183 | return count; | |
1184 | } | |
1185 | ||
1186 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
1187 | ||
1da177e4 LT |
1188 | /* |
1189 | * Real code | |
1190 | */ | |
1191 | ||
15b66ab6 | 1192 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1193 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1194 | struct i2c_board_info *info) |
8256fe0f | 1195 | { |
b2589ab0 JD |
1196 | struct i2c_adapter *adapter = client->adapter; |
1197 | int address = client->addr; | |
15b66ab6 | 1198 | const char *name = NULL; |
b2589ab0 | 1199 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1200 | |
15b66ab6 GR |
1201 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1202 | return -ENODEV; | |
1da177e4 | 1203 | |
8f2fa77c | 1204 | /* detection and identification */ |
b2589ab0 JD |
1205 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1206 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1207 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1208 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1209 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1210 | return -ENODEV; |
1211 | ||
f90be42f | 1212 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1213 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1214 | if (config2 < 0) | |
9b0e8526 | 1215 | return -ENODEV; |
f90be42f | 1216 | } else |
b2589ab0 | 1217 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1218 | |
f90be42f JD |
1219 | if ((address == 0x4C || address == 0x4D) |
1220 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1221 | if ((config1 & 0x2A) == 0x00 |
1222 | && (config2 & 0xF8) == 0x00 | |
1223 | && convrate <= 0x09) { | |
8f2fa77c JD |
1224 | if (address == 0x4C |
1225 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1226 | name = "lm90"; | |
32c82a93 | 1227 | } else |
8f2fa77c JD |
1228 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1229 | name = "lm99"; | |
1230 | dev_info(&adapter->dev, | |
1231 | "Assuming LM99 chip at 0x%02x\n", | |
1232 | address); | |
1233 | dev_info(&adapter->dev, | |
1234 | "If it is an LM89, instantiate it " | |
1235 | "with the new_device sysfs " | |
1236 | "interface\n"); | |
271dabf5 | 1237 | } else |
8f2fa77c JD |
1238 | if (address == 0x4C |
1239 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1240 | name = "lm86"; | |
1da177e4 LT |
1241 | } |
1242 | } | |
8f2fa77c JD |
1243 | } else |
1244 | if ((address == 0x4C || address == 0x4D) | |
1245 | && man_id == 0x41) { /* Analog Devices */ | |
1246 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1247 | && (config1 & 0x3F) == 0x00 |
1248 | && convrate <= 0x0A) { | |
8f2fa77c | 1249 | name = "adm1032"; |
f36ffeab GR |
1250 | /* |
1251 | * The ADM1032 supports PEC, but only if combined | |
1252 | * transactions are not used. | |
1253 | */ | |
8f2fa77c JD |
1254 | if (i2c_check_functionality(adapter, |
1255 | I2C_FUNC_SMBUS_BYTE)) | |
1256 | info->flags |= I2C_CLIENT_PEC; | |
1257 | } else | |
1258 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1259 | && (config1 & 0x1B) == 0x00 |
1260 | && convrate <= 0x0A) { | |
8f2fa77c | 1261 | name = "adt7461"; |
5a4e5e6a GR |
1262 | } else |
1263 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1264 | && (config1 & 0x1B) == 0x00 |
1265 | && convrate <= 0x0A) { | |
5a4e5e6a | 1266 | name = "adt7461a"; |
8f2fa77c JD |
1267 | } |
1268 | } else | |
1269 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1270 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1271 | |
1272 | /* | |
1273 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1274 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1275 | * exists, both readings will reflect the same value. Otherwise, | |
1276 | * the readings will be different. | |
1277 | */ | |
b2589ab0 JD |
1278 | emerg = i2c_smbus_read_byte_data(client, |
1279 | MAX6659_REG_R_REMOTE_EMERG); | |
1280 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1281 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1282 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1283 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1284 | status2 = i2c_smbus_read_byte_data(client, |
1285 | MAX6696_REG_R_STATUS2); | |
1286 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1287 | return -ENODEV; |
1288 | ||
8f2fa77c JD |
1289 | /* |
1290 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1291 | * register. Reading from that address will return the last | |
1292 | * read value, which in our case is those of the man_id | |
1293 | * register. Likewise, the config1 register seems to lack a | |
1294 | * low nibble, so the value will be those of the previous | |
1295 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1296 | * MAX6659 has a third set of upper temperature limit registers. |
1297 | * Those registers also return values on MAX6657 and MAX6658, | |
1298 | * thus the only way to detect MAX6659 is by its address. | |
1299 | * For this reason it will be mis-detected as MAX6657 if its | |
1300 | * address is 0x4C. | |
8f2fa77c JD |
1301 | */ |
1302 | if (chip_id == man_id | |
13c84951 | 1303 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1304 | && (config1 & 0x1F) == (man_id & 0x0F) |
1305 | && convrate <= 0x09) { | |
13c84951 GR |
1306 | if (address == 0x4C) |
1307 | name = "max6657"; | |
1308 | else | |
1309 | name = "max6659"; | |
8f2fa77c | 1310 | } else |
06e1c0a2 GR |
1311 | /* |
1312 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1313 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1314 | * register is unused and should return zero when read. Bit 0 of | |
1315 | * the status2 register is unused and should return zero when | |
1316 | * read. | |
1317 | * | |
1318 | * MAX6695 and MAX6696 have an additional set of temperature | |
1319 | * limit registers. We can detect those chips by checking if | |
1320 | * one of those registers exists. | |
1321 | */ | |
1322 | if (chip_id == 0x01 | |
b2589ab0 JD |
1323 | && (config1 & 0x10) == 0x00 |
1324 | && (status2 & 0x01) == 0x00 | |
1325 | && emerg == emerg2 | |
1326 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1327 | name = "max6696"; |
1328 | } else | |
8f2fa77c JD |
1329 | /* |
1330 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1331 | * revision of the chip. The lowest bit of the config1 register | |
1332 | * is unused and should return zero when read, so should the | |
1333 | * second to last bit of config1 (software reset). | |
1334 | */ | |
1335 | if (chip_id == 0x01 | |
b2589ab0 JD |
1336 | && (config1 & 0x03) == 0x00 |
1337 | && convrate <= 0x07) { | |
8f2fa77c JD |
1338 | name = "max6680"; |
1339 | } else | |
1340 | /* | |
1341 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1342 | * revision of the chip. The lowest 6 bits of the config1 | |
1343 | * register are unused and should return zero when read. | |
1344 | */ | |
1345 | if (chip_id == 0x59 | |
b2589ab0 JD |
1346 | && (config1 & 0x3f) == 0x00 |
1347 | && convrate <= 0x07) { | |
8f2fa77c | 1348 | name = "max6646"; |
1da177e4 | 1349 | } |
6771ea1f JD |
1350 | } else |
1351 | if (address == 0x4C | |
1352 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1353 | if ((config1 & 0x2A) == 0x00 |
1354 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1355 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1356 | && convrate <= 0x09) { |
c4f99a2b JD |
1357 | name = "w83l771"; |
1358 | } else | |
1359 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1360 | && convrate <= 0x08) { |
c4f99a2b JD |
1361 | name = "w83l771"; |
1362 | } | |
6771ea1f | 1363 | } |
2ef01793 | 1364 | } else |
6d101c58 JD |
1365 | if (address >= 0x48 && address <= 0x4F |
1366 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1367 | if (chip_id == 0x00 |
b2589ab0 JD |
1368 | && (config1 & 0x2A) == 0x00 |
1369 | && (config2 & 0xFE) == 0x00 | |
1370 | && convrate <= 0x09) { | |
2ef01793 SD |
1371 | name = "sa56004"; |
1372 | } | |
ae544f64 GR |
1373 | } else |
1374 | if ((address == 0x4C || address == 0x4D) | |
1375 | && man_id == 0x47) { /* GMT */ | |
1376 | if (chip_id == 0x01 /* G781 */ | |
1377 | && (config1 & 0x3F) == 0x00 | |
1378 | && convrate <= 0x08) | |
1379 | name = "g781"; | |
1daaceb2 WN |
1380 | } else |
1381 | if (address == 0x4C | |
1382 | && man_id == 0x55) { /* Texas Instruments */ | |
1383 | int local_ext; | |
1384 | ||
1385 | local_ext = i2c_smbus_read_byte_data(client, | |
1386 | TMP451_REG_R_LOCAL_TEMPL); | |
1387 | ||
1388 | if (chip_id == 0x00 /* TMP451 */ | |
1389 | && (config1 & 0x1B) == 0x00 | |
1390 | && convrate <= 0x09 | |
1391 | && (local_ext & 0x0F) == 0x00) | |
1392 | name = "tmp451"; | |
1da177e4 LT |
1393 | } |
1394 | ||
8f2fa77c JD |
1395 | if (!name) { /* identification failed */ |
1396 | dev_dbg(&adapter->dev, | |
1397 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1398 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1399 | return -ENODEV; | |
1da177e4 | 1400 | } |
8f2fa77c | 1401 | |
9b0e8526 JD |
1402 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1403 | ||
1404 | return 0; | |
1405 | } | |
1406 | ||
f7001bb0 GR |
1407 | static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data) |
1408 | { | |
1409 | /* Restore initial configuration */ | |
1410 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1411 | data->convrate_orig); | |
1412 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1413 | data->config_orig); | |
1414 | } | |
1415 | ||
1de8b250 | 1416 | static void lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1417 | { |
0c01b644 | 1418 | u8 config, convrate; |
15b66ab6 | 1419 | |
0c01b644 GR |
1420 | if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) { |
1421 | dev_warn(&client->dev, "Failed to read convrate register!\n"); | |
1422 | convrate = LM90_DEF_CONVRATE_RVAL; | |
1423 | } | |
1424 | data->convrate_orig = convrate; | |
1425 | ||
15b66ab6 GR |
1426 | /* |
1427 | * Start the conversions. | |
1428 | */ | |
0c01b644 | 1429 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
15b66ab6 GR |
1430 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
1431 | dev_warn(&client->dev, "Initialization failed!\n"); | |
1432 | return; | |
1433 | } | |
1434 | data->config_orig = config; | |
1435 | ||
1436 | /* Check Temperature Range Select */ | |
1daaceb2 | 1437 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1438 | if (config & 0x04) |
1439 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1444 | * 0.125 degree resolution) and range (0x08, extend range | |
1445 | * to -64 degree) mode for the remote temperature sensor. | |
1446 | */ | |
1447 | if (data->kind == max6680) | |
1448 | config |= 0x18; | |
1449 | ||
1450 | /* | |
1451 | * Select external channel 0 for max6695/96 | |
1452 | */ | |
1453 | if (data->kind == max6696) | |
1454 | config &= ~0x08; | |
1455 | ||
1456 | config &= 0xBF; /* run */ | |
1457 | if (config != data->config_orig) /* Only write if changed */ | |
1458 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1459 | } | |
1460 | ||
072de496 WN |
1461 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1462 | { | |
1463 | struct lm90_data *data = i2c_get_clientdata(client); | |
1464 | u8 st, st2 = 0; | |
1465 | ||
1466 | lm90_read_reg(client, LM90_REG_R_STATUS, &st); | |
1467 | ||
1468 | if (data->kind == max6696) | |
1469 | lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2); | |
1470 | ||
1471 | *status = st | (st2 << 8); | |
1472 | ||
1473 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1474 | return false; | |
1475 | ||
1476 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1477 | (st2 & MAX6696_STATUS2_LOT2)) | |
1478 | dev_warn(&client->dev, | |
1479 | "temp%d out of range, please check!\n", 1); | |
1480 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1481 | (st2 & MAX6696_STATUS2_ROT2)) | |
1482 | dev_warn(&client->dev, | |
1483 | "temp%d out of range, please check!\n", 2); | |
1484 | if (st & LM90_STATUS_ROPEN) | |
1485 | dev_warn(&client->dev, | |
1486 | "temp%d diode open, please check!\n", 2); | |
1487 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1488 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1489 | dev_warn(&client->dev, | |
1490 | "temp%d out of range, please check!\n", 3); | |
1491 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1492 | dev_warn(&client->dev, | |
1493 | "temp%d diode open, please check!\n", 3); | |
1494 | ||
1495 | return true; | |
1496 | } | |
1497 | ||
109b1283 WN |
1498 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1499 | { | |
1500 | struct i2c_client *client = dev_id; | |
1501 | u16 status; | |
1502 | ||
1503 | if (lm90_is_tripped(client, &status)) | |
1504 | return IRQ_HANDLED; | |
1505 | else | |
1506 | return IRQ_NONE; | |
1507 | } | |
1508 | ||
b2589ab0 | 1509 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1510 | const struct i2c_device_id *id) |
1511 | { | |
b2589ab0 JD |
1512 | struct device *dev = &client->dev; |
1513 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
9b0e8526 | 1514 | struct lm90_data *data; |
3e0f964f | 1515 | struct regulator *regulator; |
084489e6 | 1516 | int groups = 0; |
9b0e8526 | 1517 | int err; |
1da177e4 | 1518 | |
3e0f964f WN |
1519 | regulator = devm_regulator_get(dev, "vcc"); |
1520 | if (IS_ERR(regulator)) | |
1521 | return PTR_ERR(regulator); | |
1522 | ||
1523 | err = regulator_enable(regulator); | |
1524 | if (err < 0) { | |
d89fa686 | 1525 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1526 | return err; |
1527 | } | |
1528 | ||
d89fa686 | 1529 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1530 | if (!data) |
1531 | return -ENOMEM; | |
1532 | ||
1de8b250 | 1533 | data->client = client; |
b2589ab0 | 1534 | i2c_set_clientdata(client, data); |
9a61bf63 | 1535 | mutex_init(&data->update_lock); |
1da177e4 | 1536 | |
3e0f964f WN |
1537 | data->regulator = regulator; |
1538 | ||
9b0e8526 JD |
1539 | /* Set the device type */ |
1540 | data->kind = id->driver_data; | |
1541 | if (data->kind == adm1032) { | |
1542 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1543 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1544 | } |
1da177e4 | 1545 | |
f36ffeab GR |
1546 | /* |
1547 | * Different devices have different alarm bits triggering the | |
1548 | * ALERT# output | |
1549 | */ | |
4667bcb8 | 1550 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1551 | |
88073bb1 | 1552 | /* Set chip capabilities */ |
4667bcb8 | 1553 | data->flags = lm90_params[data->kind].flags; |
a095f687 | 1554 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1555 | |
0c01b644 GR |
1556 | /* Set maximum conversion rate */ |
1557 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1558 | ||
1da177e4 | 1559 | /* Initialize the LM90 chip */ |
1de8b250 | 1560 | lm90_init_client(client, data); |
1da177e4 LT |
1561 | |
1562 | /* Register sysfs hooks */ | |
084489e6 GR |
1563 | data->groups[groups++] = &lm90_group; |
1564 | ||
1565 | if (data->flags & LM90_HAVE_OFFSET) | |
1566 | data->groups[groups++] = &lm90_temp2_offset_group; | |
1567 | ||
1568 | if (data->flags & LM90_HAVE_EMERGENCY) | |
1569 | data->groups[groups++] = &lm90_emergency_group; | |
1570 | ||
1571 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) | |
1572 | data->groups[groups++] = &lm90_emergency_alarm_group; | |
1573 | ||
1574 | if (data->flags & LM90_HAVE_TEMP3) | |
1575 | data->groups[groups++] = &lm90_temp3_group; | |
1576 | ||
b2589ab0 JD |
1577 | if (client->flags & I2C_CLIENT_PEC) { |
1578 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1579 | if (err) |
084489e6 | 1580 | goto exit_restore; |
06e1c0a2 | 1581 | } |
0e39e01c | 1582 | |
1de8b250 GR |
1583 | data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name, |
1584 | data, data->groups); | |
1beeffe4 TJ |
1585 | if (IS_ERR(data->hwmon_dev)) { |
1586 | err = PTR_ERR(data->hwmon_dev); | |
1de8b250 | 1587 | goto exit_remove_pec; |
943b0830 MH |
1588 | } |
1589 | ||
109b1283 WN |
1590 | if (client->irq) { |
1591 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1592 | err = devm_request_threaded_irq(dev, client->irq, | |
1593 | NULL, lm90_irq_thread, | |
1594 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1595 | "lm90", client); | |
1596 | if (err < 0) { | |
1597 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
3d489ac0 | 1598 | goto exit_unregister; |
109b1283 WN |
1599 | } |
1600 | } | |
1601 | ||
1da177e4 LT |
1602 | return 0; |
1603 | ||
3d489ac0 GR |
1604 | exit_unregister: |
1605 | hwmon_device_unregister(data->hwmon_dev); | |
084489e6 GR |
1606 | exit_remove_pec: |
1607 | device_remove_file(dev, &dev_attr_pec); | |
f7001bb0 GR |
1608 | exit_restore: |
1609 | lm90_restore_conf(client, data); | |
3e0f964f WN |
1610 | regulator_disable(data->regulator); |
1611 | ||
1da177e4 LT |
1612 | return err; |
1613 | } | |
1614 | ||
9b0e8526 | 1615 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 1616 | { |
943b0830 | 1617 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 1618 | |
1beeffe4 | 1619 | hwmon_device_unregister(data->hwmon_dev); |
084489e6 | 1620 | device_remove_file(&client->dev, &dev_attr_pec); |
f7001bb0 | 1621 | lm90_restore_conf(client, data); |
3e0f964f | 1622 | regulator_disable(data->regulator); |
95238364 | 1623 | |
1da177e4 LT |
1624 | return 0; |
1625 | } | |
1626 | ||
53de3342 JD |
1627 | static void lm90_alert(struct i2c_client *client, unsigned int flag) |
1628 | { | |
072de496 | 1629 | u16 alarms; |
06e1c0a2 | 1630 | |
072de496 | 1631 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1632 | /* |
1633 | * Disable ALERT# output, because these chips don't implement | |
1634 | * SMBus alert correctly; they should only hold the alert line | |
1635 | * low briefly. | |
1636 | */ | |
072de496 WN |
1637 | struct lm90_data *data = i2c_get_clientdata(client); |
1638 | ||
1179324c | 1639 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) |
53de3342 | 1640 | && (alarms & data->alert_alarms)) { |
072de496 | 1641 | u8 config; |
53de3342 JD |
1642 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
1643 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
1644 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1645 | config | 0x80); | |
1646 | } | |
072de496 WN |
1647 | } else { |
1648 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1649 | } |
1650 | } | |
1651 | ||
15b66ab6 GR |
1652 | static struct i2c_driver lm90_driver = { |
1653 | .class = I2C_CLASS_HWMON, | |
1654 | .driver = { | |
1655 | .name = "lm90", | |
1656 | }, | |
1657 | .probe = lm90_probe, | |
1658 | .remove = lm90_remove, | |
1659 | .alert = lm90_alert, | |
1660 | .id_table = lm90_id, | |
1661 | .detect = lm90_detect, | |
1662 | .address_list = normal_i2c, | |
1663 | }; | |
1da177e4 | 1664 | |
f0967eea | 1665 | module_i2c_driver(lm90_driver); |
1da177e4 | 1666 | |
7c81c60f | 1667 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1668 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1669 | MODULE_LICENSE("GPL"); |