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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_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
175 | ||
1daaceb2 WN |
176 | /* TMP451 registers */ |
177 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 | |
178 | ||
23b2d477 NC |
179 | /* |
180 | * Device flags | |
181 | */ | |
88073bb1 GR |
182 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
183 | /* Device features */ | |
184 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 185 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 186 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
187 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
188 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 189 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
23b2d477 | 190 | |
072de496 WN |
191 | /* LM90 status */ |
192 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
193 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
194 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
195 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
196 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
197 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
198 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
199 | ||
200 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
201 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
202 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
203 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
204 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
205 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
206 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
207 | ||
1da177e4 LT |
208 | /* |
209 | * Driver data (common to all clients) | |
210 | */ | |
211 | ||
9b0e8526 JD |
212 | static const struct i2c_device_id lm90_id[] = { |
213 | { "adm1032", adm1032 }, | |
214 | { "adt7461", adt7461 }, | |
5a4e5e6a | 215 | { "adt7461a", adt7461 }, |
ae544f64 | 216 | { "g781", g781 }, |
9b0e8526 JD |
217 | { "lm90", lm90 }, |
218 | { "lm86", lm86 }, | |
97ae60bb JD |
219 | { "lm89", lm86 }, |
220 | { "lm99", lm99 }, | |
271dabf5 BH |
221 | { "max6646", max6646 }, |
222 | { "max6647", max6646 }, | |
223 | { "max6649", max6646 }, | |
9b0e8526 JD |
224 | { "max6657", max6657 }, |
225 | { "max6658", max6657 }, | |
13c84951 | 226 | { "max6659", max6659 }, |
9b0e8526 JD |
227 | { "max6680", max6680 }, |
228 | { "max6681", max6680 }, | |
06e1c0a2 GR |
229 | { "max6695", max6696 }, |
230 | { "max6696", max6696 }, | |
5a4e5e6a | 231 | { "nct1008", adt7461 }, |
6771ea1f | 232 | { "w83l771", w83l771 }, |
2ef01793 | 233 | { "sa56004", sa56004 }, |
1daaceb2 | 234 | { "tmp451", tmp451 }, |
9b0e8526 JD |
235 | { } |
236 | }; | |
237 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
238 | ||
4667bcb8 GR |
239 | /* |
240 | * chip type specific parameters | |
241 | */ | |
242 | struct lm90_params { | |
243 | u32 flags; /* Capabilities */ | |
244 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
245 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 246 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 247 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
248 | }; |
249 | ||
250 | static const struct lm90_params lm90_params[] = { | |
251 | [adm1032] = { | |
1179324c GR |
252 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
253 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 254 | .alert_alarms = 0x7c, |
0c01b644 | 255 | .max_convrate = 10, |
4667bcb8 GR |
256 | }, |
257 | [adt7461] = { | |
1179324c GR |
258 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
259 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 260 | .alert_alarms = 0x7c, |
0c01b644 | 261 | .max_convrate = 10, |
4667bcb8 | 262 | }, |
ae544f64 GR |
263 | [g781] = { |
264 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
265 | | LM90_HAVE_BROKEN_ALERT, | |
266 | .alert_alarms = 0x7c, | |
267 | .max_convrate = 8, | |
268 | }, | |
4667bcb8 GR |
269 | [lm86] = { |
270 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
271 | .alert_alarms = 0x7b, | |
0c01b644 | 272 | .max_convrate = 9, |
4667bcb8 GR |
273 | }, |
274 | [lm90] = { | |
275 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
276 | .alert_alarms = 0x7b, | |
0c01b644 | 277 | .max_convrate = 9, |
4667bcb8 GR |
278 | }, |
279 | [lm99] = { | |
280 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
281 | .alert_alarms = 0x7b, | |
0c01b644 | 282 | .max_convrate = 9, |
4667bcb8 GR |
283 | }, |
284 | [max6646] = { | |
4667bcb8 | 285 | .alert_alarms = 0x7c, |
0c01b644 | 286 | .max_convrate = 6, |
2ef01793 | 287 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
288 | }, |
289 | [max6657] = { | |
4667bcb8 | 290 | .alert_alarms = 0x7c, |
0c01b644 | 291 | .max_convrate = 8, |
2ef01793 | 292 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
293 | }, |
294 | [max6659] = { | |
a095f687 | 295 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 296 | .alert_alarms = 0x7c, |
0c01b644 | 297 | .max_convrate = 8, |
2ef01793 | 298 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
299 | }, |
300 | [max6680] = { | |
301 | .flags = LM90_HAVE_OFFSET, | |
302 | .alert_alarms = 0x7c, | |
0c01b644 | 303 | .max_convrate = 7, |
4667bcb8 GR |
304 | }, |
305 | [max6696] = { | |
a095f687 | 306 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 307 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 308 | .alert_alarms = 0x1c7c, |
0c01b644 | 309 | .max_convrate = 6, |
2ef01793 | 310 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
311 | }, |
312 | [w83l771] = { | |
313 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
314 | .alert_alarms = 0x7c, | |
0c01b644 | 315 | .max_convrate = 8, |
4667bcb8 | 316 | }, |
2ef01793 | 317 | [sa56004] = { |
a095f687 | 318 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
319 | .alert_alarms = 0x7b, |
320 | .max_convrate = 9, | |
321 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
322 | }, | |
1daaceb2 WN |
323 | [tmp451] = { |
324 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
325 | | LM90_HAVE_BROKEN_ALERT, | |
326 | .alert_alarms = 0x7c, | |
327 | .max_convrate = 9, | |
328 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
329 | } | |
4667bcb8 GR |
330 | }; |
331 | ||
40465d94 WN |
332 | /* |
333 | * TEMP8 register index | |
334 | */ | |
335 | enum lm90_temp8_reg_index { | |
336 | LOCAL_LOW = 0, | |
337 | LOCAL_HIGH, | |
338 | LOCAL_CRIT, | |
339 | REMOTE_CRIT, | |
340 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
341 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
342 | REMOTE2_CRIT, /* max6695/96 only */ | |
343 | REMOTE2_EMERG, /* max6695/96 only */ | |
344 | TEMP8_REG_NUM | |
345 | }; | |
346 | ||
347 | /* | |
348 | * TEMP11 register index | |
349 | */ | |
350 | enum lm90_temp11_reg_index { | |
351 | REMOTE_TEMP = 0, | |
352 | REMOTE_LOW, | |
353 | REMOTE_HIGH, | |
354 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
355 | LOCAL_TEMP, | |
356 | REMOTE2_TEMP, /* max6695/96 only */ | |
357 | REMOTE2_LOW, /* max6695/96 only */ | |
358 | REMOTE2_HIGH, /* max6695/96 only */ | |
359 | TEMP11_REG_NUM | |
360 | }; | |
361 | ||
1da177e4 LT |
362 | /* |
363 | * Client data (each client gets its own) | |
364 | */ | |
365 | ||
366 | struct lm90_data { | |
1de8b250 | 367 | struct i2c_client *client; |
084489e6 | 368 | const struct attribute_group *groups[6]; |
9a61bf63 | 369 | struct mutex update_lock; |
2f83ab77 | 370 | bool valid; /* true if register values are valid */ |
1da177e4 LT |
371 | unsigned long last_updated; /* in jiffies */ |
372 | int kind; | |
4667bcb8 | 373 | u32 flags; |
1da177e4 | 374 | |
38bab98a | 375 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 376 | |
95238364 | 377 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 378 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
379 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
380 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 381 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 382 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 383 | |
1da177e4 | 384 | /* registers values */ |
40465d94 WN |
385 | s8 temp8[TEMP8_REG_NUM]; |
386 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 387 | u8 temp_hyst; |
06e1c0a2 | 388 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
389 | }; |
390 | ||
15b66ab6 GR |
391 | /* |
392 | * Support functions | |
393 | */ | |
394 | ||
395 | /* | |
396 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
397 | * to explicitly ask for a transaction without PEC. | |
398 | */ | |
399 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
400 | { | |
401 | return i2c_smbus_xfer(client->adapter, client->addr, | |
402 | client->flags & ~I2C_CLIENT_PEC, | |
403 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
404 | } | |
405 | ||
406 | /* | |
407 | * It is assumed that client->update_lock is held (unless we are in | |
408 | * detection or initialization steps). This matters when PEC is enabled, | |
409 | * because we don't want the address pointer to change between the write | |
410 | * byte and the read byte transactions. | |
411 | */ | |
37ad04d7 | 412 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
413 | { |
414 | int err; | |
415 | ||
416 | if (client->flags & I2C_CLIENT_PEC) { | |
417 | err = adm1032_write_byte(client, reg); | |
418 | if (err >= 0) | |
419 | err = i2c_smbus_read_byte(client); | |
420 | } else | |
421 | err = i2c_smbus_read_byte_data(client, reg); | |
422 | ||
37ad04d7 | 423 | return err; |
15b66ab6 GR |
424 | } |
425 | ||
37ad04d7 | 426 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 427 | { |
37ad04d7 | 428 | int oldh, newh, l; |
15b66ab6 GR |
429 | |
430 | /* | |
431 | * There is a trick here. We have to read two registers to have the | |
432 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 433 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
434 | * the one-shot conversion register, which we don't want to do |
435 | * (disables hardware monitoring) or monitor the busy bit, which is | |
436 | * impossible (we can't read the values and monitor that bit at the | |
437 | * exact same time). So the solution used here is to read the high | |
438 | * byte once, then the low byte, then the high byte again. If the new | |
439 | * high byte matches the old one, then we have a valid reading. Else | |
440 | * we have to read the low byte again, and now we believe we have a | |
441 | * correct reading. | |
442 | */ | |
37ad04d7 GR |
443 | oldh = lm90_read_reg(client, regh); |
444 | if (oldh < 0) | |
445 | return oldh; | |
446 | l = lm90_read_reg(client, regl); | |
447 | if (l < 0) | |
448 | return l; | |
449 | newh = lm90_read_reg(client, regh); | |
450 | if (newh < 0) | |
451 | return newh; | |
15b66ab6 | 452 | if (oldh != newh) { |
37ad04d7 GR |
453 | l = lm90_read_reg(client, regl); |
454 | if (l < 0) | |
455 | return l; | |
15b66ab6 | 456 | } |
37ad04d7 | 457 | return (newh << 8) | l; |
15b66ab6 GR |
458 | } |
459 | ||
460 | /* | |
461 | * client->update_lock must be held when calling this function (unless we are | |
462 | * in detection or initialization steps), and while a remote channel other | |
463 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
464 | * external channel 0 before releasing the lock. This is necessary because | |
465 | * various registers have different meanings as a result of selecting a | |
466 | * non-default remote channel. | |
467 | */ | |
37ad04d7 GR |
468 | static inline int lm90_select_remote_channel(struct i2c_client *client, |
469 | struct lm90_data *data, | |
470 | int channel) | |
15b66ab6 | 471 | { |
37ad04d7 | 472 | int config; |
15b66ab6 GR |
473 | |
474 | if (data->kind == max6696) { | |
37ad04d7 GR |
475 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
476 | if (config < 0) | |
477 | return config; | |
15b66ab6 GR |
478 | config &= ~0x08; |
479 | if (channel) | |
480 | config |= 0x08; | |
481 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
482 | config); | |
483 | } | |
37ad04d7 | 484 | return 0; |
15b66ab6 GR |
485 | } |
486 | ||
0c01b644 GR |
487 | /* |
488 | * Set conversion rate. | |
489 | * client->update_lock must be held when calling this function (unless we are | |
490 | * in detection or initialization steps). | |
491 | */ | |
492 | static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, | |
493 | unsigned int interval) | |
494 | { | |
495 | int i; | |
496 | unsigned int update_interval; | |
497 | ||
498 | /* Shift calculations to avoid rounding errors */ | |
499 | interval <<= 6; | |
500 | ||
501 | /* find the nearest update rate */ | |
502 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
503 | i < data->max_convrate; i++, update_interval >>= 1) | |
504 | if (interval >= update_interval * 3 / 4) | |
505 | break; | |
506 | ||
507 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); | |
508 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); | |
509 | } | |
510 | ||
10bfef47 GR |
511 | static int lm90_update_limits(struct device *dev) |
512 | { | |
513 | struct lm90_data *data = dev_get_drvdata(dev); | |
514 | struct i2c_client *client = data->client; | |
515 | int val; | |
516 | ||
517 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
518 | if (val < 0) | |
519 | return val; | |
520 | data->temp8[LOCAL_CRIT] = val; | |
521 | ||
522 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
523 | if (val < 0) | |
524 | return val; | |
525 | data->temp8[REMOTE_CRIT] = val; | |
526 | ||
527 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); | |
528 | if (val < 0) | |
529 | return val; | |
530 | data->temp_hyst = val; | |
531 | ||
532 | lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
533 | if (val < 0) | |
534 | return val; | |
535 | data->temp11[REMOTE_LOW] = val << 8; | |
536 | ||
537 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
538 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
539 | if (val < 0) | |
540 | return val; | |
541 | data->temp11[REMOTE_LOW] |= val; | |
542 | } | |
543 | ||
544 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
545 | if (val < 0) | |
546 | return val; | |
547 | data->temp11[REMOTE_HIGH] = val << 8; | |
548 | ||
549 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
550 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
551 | if (val < 0) | |
552 | return val; | |
553 | data->temp11[REMOTE_HIGH] |= val; | |
554 | } | |
555 | ||
556 | if (data->flags & LM90_HAVE_OFFSET) { | |
557 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
558 | LM90_REG_R_REMOTE_OFFSL); | |
559 | if (val < 0) | |
560 | return val; | |
561 | data->temp11[REMOTE_OFFSET] = val; | |
562 | } | |
563 | ||
564 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
565 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
566 | if (val < 0) | |
567 | return val; | |
568 | data->temp8[LOCAL_EMERG] = val; | |
569 | ||
570 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
571 | if (val < 0) | |
572 | return val; | |
573 | data->temp8[REMOTE_EMERG] = val; | |
574 | } | |
575 | ||
576 | if (data->kind == max6696) { | |
577 | val = lm90_select_remote_channel(client, data, 1); | |
578 | if (val < 0) | |
579 | return val; | |
580 | ||
581 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
582 | if (val < 0) | |
583 | return val; | |
584 | data->temp8[REMOTE2_CRIT] = val; | |
585 | ||
586 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
587 | if (val < 0) | |
588 | return val; | |
589 | data->temp8[REMOTE2_EMERG] = val; | |
590 | ||
591 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
592 | if (val < 0) | |
593 | return val; | |
594 | data->temp11[REMOTE2_LOW] = val << 8; | |
595 | ||
596 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
597 | if (val < 0) | |
598 | return val; | |
599 | data->temp11[REMOTE2_HIGH] = val << 8; | |
600 | ||
601 | lm90_select_remote_channel(client, data, 0); | |
602 | } | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
15b66ab6 GR |
607 | static struct lm90_data *lm90_update_device(struct device *dev) |
608 | { | |
1de8b250 GR |
609 | struct lm90_data *data = dev_get_drvdata(dev); |
610 | struct i2c_client *client = data->client; | |
0c01b644 | 611 | unsigned long next_update; |
37ad04d7 | 612 | int val = 0; |
15b66ab6 GR |
613 | |
614 | mutex_lock(&data->update_lock); | |
615 | ||
10bfef47 GR |
616 | if (!data->valid) { |
617 | val = lm90_update_limits(dev); | |
618 | if (val < 0) | |
619 | goto error; | |
620 | } | |
621 | ||
78c2c2fe JD |
622 | next_update = data->last_updated + |
623 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 624 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 625 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 626 | |
2f83ab77 | 627 | data->valid = false; |
10bfef47 | 628 | |
37ad04d7 GR |
629 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
630 | if (val < 0) | |
631 | goto error; | |
632 | data->temp8[LOCAL_LOW] = val; | |
633 | ||
634 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
635 | if (val < 0) | |
636 | goto error; | |
637 | data->temp8[LOCAL_HIGH] = val; | |
638 | ||
a095f687 | 639 | if (data->reg_local_ext) { |
37ad04d7 GR |
640 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
641 | data->reg_local_ext); | |
642 | if (val < 0) | |
643 | goto error; | |
644 | data->temp11[LOCAL_TEMP] = val; | |
15b66ab6 | 645 | } else { |
37ad04d7 GR |
646 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
647 | if (val < 0) | |
648 | goto error; | |
649 | data->temp11[LOCAL_TEMP] = val << 8; | |
15b66ab6 | 650 | } |
37ad04d7 GR |
651 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
652 | LM90_REG_R_REMOTE_TEMPL); | |
653 | if (val < 0) | |
654 | goto error; | |
655 | data->temp11[REMOTE_TEMP] = val; | |
656 | ||
37ad04d7 GR |
657 | val = lm90_read_reg(client, LM90_REG_R_STATUS); |
658 | if (val < 0) | |
659 | goto error; | |
660 | data->alarms = val; /* lower 8 bit of alarms */ | |
15b66ab6 GR |
661 | |
662 | if (data->kind == max6696) { | |
37ad04d7 GR |
663 | val = lm90_select_remote_channel(client, data, 1); |
664 | if (val < 0) | |
665 | goto error; | |
666 | ||
37ad04d7 GR |
667 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
668 | LM90_REG_R_REMOTE_TEMPL); | |
669 | if (val < 0) | |
670 | goto error; | |
671 | data->temp11[REMOTE2_TEMP] = val; | |
672 | ||
15b66ab6 GR |
673 | lm90_select_remote_channel(client, data, 0); |
674 | ||
37ad04d7 GR |
675 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); |
676 | if (val < 0) | |
677 | goto error; | |
678 | data->alarms |= val << 8; | |
15b66ab6 GR |
679 | } |
680 | ||
f36ffeab GR |
681 | /* |
682 | * Re-enable ALERT# output if it was originally enabled and | |
683 | * relevant alarms are all clear | |
684 | */ | |
37ad04d7 GR |
685 | if (!(data->config_orig & 0x80) && |
686 | !(data->alarms & data->alert_alarms)) { | |
687 | val = lm90_read_reg(client, LM90_REG_R_CONFIG1); | |
688 | if (val < 0) | |
689 | goto error; | |
15b66ab6 | 690 | |
37ad04d7 | 691 | if (val & 0x80) { |
15b66ab6 GR |
692 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); |
693 | i2c_smbus_write_byte_data(client, | |
694 | LM90_REG_W_CONFIG1, | |
37ad04d7 | 695 | val & ~0x80); |
15b66ab6 GR |
696 | } |
697 | } | |
698 | ||
699 | data->last_updated = jiffies; | |
2f83ab77 | 700 | data->valid = true; |
15b66ab6 GR |
701 | } |
702 | ||
37ad04d7 | 703 | error: |
15b66ab6 GR |
704 | mutex_unlock(&data->update_lock); |
705 | ||
37ad04d7 GR |
706 | if (val < 0) |
707 | return ERR_PTR(val); | |
708 | ||
15b66ab6 GR |
709 | return data; |
710 | } | |
711 | ||
cea50fe2 NC |
712 | /* |
713 | * Conversions | |
714 | * For local temperatures and limits, critical limits and the hysteresis | |
715 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
716 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
717 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
718 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
719 | */ |
720 | ||
9d4d3834 | 721 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
722 | { |
723 | return val * 1000; | |
724 | } | |
725 | ||
271dabf5 BH |
726 | static inline int temp_from_u8(u8 val) |
727 | { | |
728 | return val * 1000; | |
729 | } | |
730 | ||
9d4d3834 | 731 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
732 | { |
733 | return val / 32 * 125; | |
734 | } | |
735 | ||
271dabf5 BH |
736 | static inline int temp_from_u16(u16 val) |
737 | { | |
738 | return val / 32 * 125; | |
739 | } | |
740 | ||
9d4d3834 | 741 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
742 | { |
743 | if (val <= -128000) | |
744 | return -128; | |
745 | if (val >= 127000) | |
746 | return 127; | |
747 | if (val < 0) | |
748 | return (val - 500) / 1000; | |
749 | return (val + 500) / 1000; | |
750 | } | |
751 | ||
271dabf5 BH |
752 | static u8 temp_to_u8(long val) |
753 | { | |
754 | if (val <= 0) | |
755 | return 0; | |
756 | if (val >= 255000) | |
757 | return 255; | |
758 | return (val + 500) / 1000; | |
759 | } | |
760 | ||
9d4d3834 | 761 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
762 | { |
763 | if (val <= -128000) | |
764 | return 0x8000; | |
765 | if (val >= 127875) | |
766 | return 0x7FE0; | |
767 | if (val < 0) | |
768 | return (val - 62) / 125 * 32; | |
769 | return (val + 62) / 125 * 32; | |
770 | } | |
771 | ||
772 | static u8 hyst_to_reg(long val) | |
773 | { | |
774 | if (val <= 0) | |
775 | return 0; | |
776 | if (val >= 30500) | |
777 | return 31; | |
778 | return (val + 500) / 1000; | |
779 | } | |
780 | ||
781 | /* | |
23b2d477 NC |
782 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
783 | * attempts to write values that are outside the range 0 < temp < 127 are | |
784 | * treated as the boundary value. | |
785 | * | |
786 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
787 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 788 | */ |
9d4d3834 | 789 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 790 | { |
23b2d477 NC |
791 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
792 | return (val - 64) * 1000; | |
589f707c | 793 | return temp_from_s8(val); |
cea50fe2 NC |
794 | } |
795 | ||
9d4d3834 | 796 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 797 | { |
23b2d477 NC |
798 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
799 | return (val - 0x4000) / 64 * 250; | |
589f707c | 800 | return temp_from_s16(val); |
23b2d477 NC |
801 | } |
802 | ||
9d4d3834 | 803 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
804 | { |
805 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
806 | if (val <= -64000) | |
807 | return 0; | |
808 | if (val >= 191000) | |
809 | return 0xFF; | |
810 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 811 | } |
589f707c GR |
812 | if (val <= 0) |
813 | return 0; | |
814 | if (val >= 127000) | |
815 | return 127; | |
816 | return (val + 500) / 1000; | |
23b2d477 NC |
817 | } |
818 | ||
9d4d3834 | 819 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
820 | { |
821 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
822 | if (val <= -64000) | |
823 | return 0; | |
824 | if (val >= 191750) | |
825 | return 0xFFC0; | |
826 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 827 | } |
589f707c GR |
828 | if (val <= 0) |
829 | return 0; | |
830 | if (val >= 127750) | |
831 | return 0x7FC0; | |
832 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
833 | } |
834 | ||
1da177e4 LT |
835 | /* |
836 | * Sysfs stuff | |
837 | */ | |
838 | ||
30d7394b JD |
839 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
840 | char *buf) | |
841 | { | |
842 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
843 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
844 | int temp; |
845 | ||
37ad04d7 GR |
846 | if (IS_ERR(data)) |
847 | return PTR_ERR(data); | |
848 | ||
1daaceb2 | 849 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 850 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
851 | else if (data->kind == max6646) |
852 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 853 | else |
9d4d3834 | 854 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 855 | |
97ae60bb JD |
856 | /* +16 degrees offset for temp2 for the LM99 */ |
857 | if (data->kind == lm99 && attr->index == 3) | |
858 | temp += 16000; | |
859 | ||
23b2d477 | 860 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
861 | } |
862 | ||
863 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
864 | const char *buf, size_t count) | |
865 | { | |
40465d94 | 866 | static const u8 reg[TEMP8_REG_NUM] = { |
30d7394b JD |
867 | LM90_REG_W_LOCAL_LOW, |
868 | LM90_REG_W_LOCAL_HIGH, | |
869 | LM90_REG_W_LOCAL_CRIT, | |
870 | LM90_REG_W_REMOTE_CRIT, | |
6948708d GR |
871 | MAX6659_REG_W_LOCAL_EMERG, |
872 | MAX6659_REG_W_REMOTE_EMERG, | |
06e1c0a2 GR |
873 | LM90_REG_W_REMOTE_CRIT, |
874 | MAX6659_REG_W_REMOTE_EMERG, | |
30d7394b JD |
875 | }; |
876 | ||
877 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
1de8b250 GR |
878 | struct lm90_data *data = dev_get_drvdata(dev); |
879 | struct i2c_client *client = data->client; | |
30d7394b | 880 | int nr = attr->index; |
11e57812 GR |
881 | long val; |
882 | int err; | |
883 | ||
179c4fdb | 884 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
885 | if (err < 0) |
886 | return err; | |
30d7394b | 887 | |
97ae60bb JD |
888 | /* +16 degrees offset for temp2 for the LM99 */ |
889 | if (data->kind == lm99 && attr->index == 3) | |
890 | val -= 16000; | |
891 | ||
9a61bf63 | 892 | mutex_lock(&data->update_lock); |
1daaceb2 | 893 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 894 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
895 | else if (data->kind == max6646) |
896 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 897 | else |
9d4d3834 | 898 | data->temp8[nr] = temp_to_s8(val); |
06e1c0a2 GR |
899 | |
900 | lm90_select_remote_channel(client, data, nr >= 6); | |
f65e1708 | 901 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
06e1c0a2 GR |
902 | lm90_select_remote_channel(client, data, 0); |
903 | ||
9a61bf63 | 904 | mutex_unlock(&data->update_lock); |
30d7394b | 905 | return count; |
1da177e4 | 906 | } |
30d7394b JD |
907 | |
908 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
909 | char *buf) | |
910 | { | |
96512861 | 911 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b | 912 | struct lm90_data *data = lm90_update_device(dev); |
23b2d477 NC |
913 | int temp; |
914 | ||
37ad04d7 GR |
915 | if (IS_ERR(data)) |
916 | return PTR_ERR(data); | |
917 | ||
1daaceb2 | 918 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 919 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
920 | else if (data->kind == max6646) |
921 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 922 | else |
9d4d3834 | 923 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 924 | |
97ae60bb JD |
925 | /* +16 degrees offset for temp2 for the LM99 */ |
926 | if (data->kind == lm99 && attr->index <= 2) | |
927 | temp += 16000; | |
928 | ||
23b2d477 | 929 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 930 | } |
30d7394b JD |
931 | |
932 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
933 | const char *buf, size_t count) | |
934 | { | |
96512861 GR |
935 | struct { |
936 | u8 high; | |
937 | u8 low; | |
06e1c0a2 GR |
938 | int channel; |
939 | } reg[5] = { | |
940 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 }, | |
941 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 }, | |
942 | { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 }, | |
943 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 }, | |
944 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } | |
30d7394b JD |
945 | }; |
946 | ||
96512861 | 947 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1de8b250 GR |
948 | struct lm90_data *data = dev_get_drvdata(dev); |
949 | struct i2c_client *client = data->client; | |
96512861 GR |
950 | int nr = attr->nr; |
951 | int index = attr->index; | |
11e57812 GR |
952 | long val; |
953 | int err; | |
954 | ||
179c4fdb | 955 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
956 | if (err < 0) |
957 | return err; | |
30d7394b | 958 | |
97ae60bb | 959 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 960 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
961 | val -= 16000; |
962 | ||
9a61bf63 | 963 | mutex_lock(&data->update_lock); |
1daaceb2 | 964 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 965 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 966 | else if (data->kind == max6646) |
96512861 | 967 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 968 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 969 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 970 | else |
96512861 | 971 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 972 | |
06e1c0a2 | 973 | lm90_select_remote_channel(client, data, reg[nr].channel); |
96512861 GR |
974 | i2c_smbus_write_byte_data(client, reg[nr].high, |
975 | data->temp11[index] >> 8); | |
88073bb1 | 976 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 GR |
977 | i2c_smbus_write_byte_data(client, reg[nr].low, |
978 | data->temp11[index] & 0xff); | |
06e1c0a2 GR |
979 | lm90_select_remote_channel(client, data, 0); |
980 | ||
9a61bf63 | 981 | mutex_unlock(&data->update_lock); |
30d7394b | 982 | return count; |
1da177e4 | 983 | } |
30d7394b | 984 | |
11e57812 GR |
985 | static ssize_t show_temphyst(struct device *dev, |
986 | struct device_attribute *devattr, | |
30d7394b JD |
987 | char *buf) |
988 | { | |
989 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
990 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
991 | int temp; |
992 | ||
37ad04d7 GR |
993 | if (IS_ERR(data)) |
994 | return PTR_ERR(data); | |
995 | ||
1daaceb2 | 996 | if (data->kind == adt7461 || data->kind == tmp451) |
9d4d3834 | 997 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
998 | else if (data->kind == max6646) |
999 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 1000 | else |
9d4d3834 | 1001 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 1002 | |
97ae60bb JD |
1003 | /* +16 degrees offset for temp2 for the LM99 */ |
1004 | if (data->kind == lm99 && attr->index == 3) | |
1005 | temp += 16000; | |
1006 | ||
9d4d3834 | 1007 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 1008 | } |
1da177e4 | 1009 | |
30d7394b JD |
1010 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
1011 | const char *buf, size_t count) | |
1da177e4 | 1012 | { |
1de8b250 GR |
1013 | struct lm90_data *data = dev_get_drvdata(dev); |
1014 | struct i2c_client *client = data->client; | |
11e57812 GR |
1015 | long val; |
1016 | int err; | |
ec38fa2b | 1017 | int temp; |
1da177e4 | 1018 | |
179c4fdb | 1019 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1020 | if (err < 0) |
1021 | return err; | |
1022 | ||
9a61bf63 | 1023 | mutex_lock(&data->update_lock); |
1daaceb2 | 1024 | if (data->kind == adt7461 || data->kind == tmp451) |
40465d94 | 1025 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); |
ec38fa2b | 1026 | else if (data->kind == max6646) |
40465d94 | 1027 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); |
ec38fa2b | 1028 | else |
40465d94 | 1029 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); |
ec38fa2b JD |
1030 | |
1031 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 1032 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 1033 | data->temp_hyst); |
9a61bf63 | 1034 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
1035 | return count; |
1036 | } | |
1037 | ||
30d7394b JD |
1038 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
1039 | char *buf) | |
1da177e4 LT |
1040 | { |
1041 | struct lm90_data *data = lm90_update_device(dev); | |
37ad04d7 GR |
1042 | |
1043 | if (IS_ERR(data)) | |
1044 | return PTR_ERR(data); | |
1045 | ||
1da177e4 LT |
1046 | return sprintf(buf, "%d\n", data->alarms); |
1047 | } | |
1048 | ||
2d45771e JD |
1049 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
1050 | *devattr, char *buf) | |
1051 | { | |
1052 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
1053 | struct lm90_data *data = lm90_update_device(dev); | |
1054 | int bitnr = attr->index; | |
1055 | ||
37ad04d7 GR |
1056 | if (IS_ERR(data)) |
1057 | return PTR_ERR(data); | |
1058 | ||
2d45771e JD |
1059 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); |
1060 | } | |
1061 | ||
0c01b644 GR |
1062 | static ssize_t show_update_interval(struct device *dev, |
1063 | struct device_attribute *attr, char *buf) | |
1064 | { | |
1065 | struct lm90_data *data = dev_get_drvdata(dev); | |
1066 | ||
1067 | return sprintf(buf, "%u\n", data->update_interval); | |
1068 | } | |
1069 | ||
1070 | static ssize_t set_update_interval(struct device *dev, | |
1071 | struct device_attribute *attr, | |
1072 | const char *buf, size_t count) | |
1073 | { | |
1de8b250 GR |
1074 | struct lm90_data *data = dev_get_drvdata(dev); |
1075 | struct i2c_client *client = data->client; | |
0c01b644 GR |
1076 | unsigned long val; |
1077 | int err; | |
1078 | ||
179c4fdb | 1079 | err = kstrtoul(buf, 10, &val); |
0c01b644 GR |
1080 | if (err) |
1081 | return err; | |
1082 | ||
1083 | mutex_lock(&data->update_lock); | |
2a844c14 | 1084 | lm90_set_convrate(client, data, clamp_val(val, 0, 100000)); |
0c01b644 GR |
1085 | mutex_unlock(&data->update_lock); |
1086 | ||
1087 | return count; | |
1088 | } | |
1089 | ||
40465d94 WN |
1090 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, |
1091 | 0, LOCAL_TEMP); | |
1092 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, | |
1093 | 0, REMOTE_TEMP); | |
30d7394b | 1094 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1095 | set_temp8, LOCAL_LOW); |
96512861 | 1096 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1097 | set_temp11, 0, REMOTE_LOW); |
30d7394b | 1098 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1099 | set_temp8, LOCAL_HIGH); |
96512861 | 1100 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1101 | set_temp11, 1, REMOTE_HIGH); |
30d7394b | 1102 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1103 | set_temp8, LOCAL_CRIT); |
30d7394b | 1104 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1105 | set_temp8, REMOTE_CRIT); |
30d7394b | 1106 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
40465d94 WN |
1107 | set_temphyst, LOCAL_CRIT); |
1108 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1109 | REMOTE_CRIT); | |
96512861 | 1110 | static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1111 | set_temp11, 2, REMOTE_OFFSET); |
2d45771e JD |
1112 | |
1113 | /* Individual alarm files */ | |
1114 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
1115 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 1116 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
1117 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
1118 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
1119 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
1120 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
1121 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
1122 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1123 | ||
0c01b644 GR |
1124 | static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, |
1125 | set_update_interval); | |
1126 | ||
0e39e01c JD |
1127 | static struct attribute *lm90_attributes[] = { |
1128 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
1129 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
1130 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
1131 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
1132 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
1133 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
1134 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
1135 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
1136 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
1137 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
1138 | ||
1139 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
1140 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 1141 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
1142 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
1143 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
1144 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
1145 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
1146 | &dev_attr_alarms.attr, | |
0c01b644 | 1147 | &dev_attr_update_interval.attr, |
0e39e01c JD |
1148 | NULL |
1149 | }; | |
1150 | ||
1151 | static const struct attribute_group lm90_group = { | |
1152 | .attrs = lm90_attributes, | |
1153 | }; | |
1154 | ||
742192f5 GR |
1155 | static struct attribute *lm90_temp2_offset_attributes[] = { |
1156 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
1157 | NULL | |
1158 | }; | |
1159 | ||
1160 | static const struct attribute_group lm90_temp2_offset_group = { | |
1161 | .attrs = lm90_temp2_offset_attributes, | |
1162 | }; | |
1163 | ||
6948708d GR |
1164 | /* |
1165 | * Additional attributes for devices with emergency sensors | |
1166 | */ | |
1167 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
40465d94 | 1168 | set_temp8, LOCAL_EMERG); |
6948708d | 1169 | static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1170 | set_temp8, REMOTE_EMERG); |
6948708d | 1171 | static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1172 | NULL, LOCAL_EMERG); |
6948708d | 1173 | static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1174 | NULL, REMOTE_EMERG); |
6948708d GR |
1175 | |
1176 | static struct attribute *lm90_emergency_attributes[] = { | |
1177 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, | |
1178 | &sensor_dev_attr_temp2_emergency.dev_attr.attr, | |
1179 | &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr, | |
1180 | &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr, | |
1181 | NULL | |
1182 | }; | |
1183 | ||
1184 | static const struct attribute_group lm90_emergency_group = { | |
1185 | .attrs = lm90_emergency_attributes, | |
1186 | }; | |
1187 | ||
06e1c0a2 GR |
1188 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15); |
1189 | static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1190 | ||
1191 | static struct attribute *lm90_emergency_alarm_attributes[] = { | |
1192 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, | |
1193 | &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, | |
1194 | NULL | |
1195 | }; | |
1196 | ||
1197 | static const struct attribute_group lm90_emergency_alarm_group = { | |
1198 | .attrs = lm90_emergency_alarm_attributes, | |
1199 | }; | |
1200 | ||
1201 | /* | |
1202 | * Additional attributes for devices with 3 temperature sensors | |
1203 | */ | |
40465d94 WN |
1204 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, |
1205 | 0, REMOTE2_TEMP); | |
06e1c0a2 | 1206 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1207 | set_temp11, 3, REMOTE2_LOW); |
06e1c0a2 | 1208 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11, |
40465d94 | 1209 | set_temp11, 4, REMOTE2_HIGH); |
06e1c0a2 | 1210 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 WN |
1211 | set_temp8, REMOTE2_CRIT); |
1212 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, | |
1213 | REMOTE2_CRIT); | |
06e1c0a2 | 1214 | static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8, |
40465d94 | 1215 | set_temp8, REMOTE2_EMERG); |
06e1c0a2 | 1216 | static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst, |
40465d94 | 1217 | NULL, REMOTE2_EMERG); |
06e1c0a2 GR |
1218 | |
1219 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
1220 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10); | |
1221 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11); | |
1222 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12); | |
1223 | static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14); | |
1224 | ||
1225 | static struct attribute *lm90_temp3_attributes[] = { | |
1226 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
1227 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
1228 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
1229 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
1230 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
1231 | &sensor_dev_attr_temp3_emergency.dev_attr.attr, | |
1232 | &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr, | |
1233 | ||
1234 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
1235 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
1236 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
1237 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
1238 | &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr, | |
1239 | NULL | |
1240 | }; | |
1241 | ||
1242 | static const struct attribute_group lm90_temp3_group = { | |
1243 | .attrs = lm90_temp3_attributes, | |
1244 | }; | |
1245 | ||
c3df5806 JD |
1246 | /* pec used for ADM1032 only */ |
1247 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
1248 | char *buf) | |
1249 | { | |
1250 | struct i2c_client *client = to_i2c_client(dev); | |
1251 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
1252 | } | |
1253 | ||
1254 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
1255 | const char *buf, size_t count) | |
1256 | { | |
1257 | struct i2c_client *client = to_i2c_client(dev); | |
11e57812 GR |
1258 | long val; |
1259 | int err; | |
1260 | ||
179c4fdb | 1261 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1262 | if (err < 0) |
1263 | return err; | |
c3df5806 JD |
1264 | |
1265 | switch (val) { | |
1266 | case 0: | |
1267 | client->flags &= ~I2C_CLIENT_PEC; | |
1268 | break; | |
1269 | case 1: | |
1270 | client->flags |= I2C_CLIENT_PEC; | |
1271 | break; | |
1272 | default: | |
1273 | return -EINVAL; | |
1274 | } | |
1275 | ||
1276 | return count; | |
1277 | } | |
1278 | ||
1279 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
1280 | ||
1da177e4 LT |
1281 | /* |
1282 | * Real code | |
1283 | */ | |
1284 | ||
15b66ab6 | 1285 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1286 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1287 | struct i2c_board_info *info) |
8256fe0f | 1288 | { |
b2589ab0 JD |
1289 | struct i2c_adapter *adapter = client->adapter; |
1290 | int address = client->addr; | |
15b66ab6 | 1291 | const char *name = NULL; |
b2589ab0 | 1292 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1293 | |
15b66ab6 GR |
1294 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1295 | return -ENODEV; | |
1da177e4 | 1296 | |
8f2fa77c | 1297 | /* detection and identification */ |
b2589ab0 JD |
1298 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1299 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1300 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1301 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1302 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1303 | return -ENODEV; |
1304 | ||
f90be42f | 1305 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1306 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1307 | if (config2 < 0) | |
9b0e8526 | 1308 | return -ENODEV; |
f90be42f | 1309 | } else |
b2589ab0 | 1310 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1311 | |
f90be42f JD |
1312 | if ((address == 0x4C || address == 0x4D) |
1313 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1314 | if ((config1 & 0x2A) == 0x00 |
1315 | && (config2 & 0xF8) == 0x00 | |
1316 | && convrate <= 0x09) { | |
8f2fa77c JD |
1317 | if (address == 0x4C |
1318 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1319 | name = "lm90"; | |
32c82a93 | 1320 | } else |
8f2fa77c JD |
1321 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1322 | name = "lm99"; | |
1323 | dev_info(&adapter->dev, | |
1324 | "Assuming LM99 chip at 0x%02x\n", | |
1325 | address); | |
1326 | dev_info(&adapter->dev, | |
1327 | "If it is an LM89, instantiate it " | |
1328 | "with the new_device sysfs " | |
1329 | "interface\n"); | |
271dabf5 | 1330 | } else |
8f2fa77c JD |
1331 | if (address == 0x4C |
1332 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1333 | name = "lm86"; | |
1da177e4 LT |
1334 | } |
1335 | } | |
8f2fa77c JD |
1336 | } else |
1337 | if ((address == 0x4C || address == 0x4D) | |
1338 | && man_id == 0x41) { /* Analog Devices */ | |
1339 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1340 | && (config1 & 0x3F) == 0x00 |
1341 | && convrate <= 0x0A) { | |
8f2fa77c | 1342 | name = "adm1032"; |
f36ffeab GR |
1343 | /* |
1344 | * The ADM1032 supports PEC, but only if combined | |
1345 | * transactions are not used. | |
1346 | */ | |
8f2fa77c JD |
1347 | if (i2c_check_functionality(adapter, |
1348 | I2C_FUNC_SMBUS_BYTE)) | |
1349 | info->flags |= I2C_CLIENT_PEC; | |
1350 | } else | |
1351 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1352 | && (config1 & 0x1B) == 0x00 |
1353 | && convrate <= 0x0A) { | |
8f2fa77c | 1354 | name = "adt7461"; |
5a4e5e6a GR |
1355 | } else |
1356 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1357 | && (config1 & 0x1B) == 0x00 |
1358 | && convrate <= 0x0A) { | |
5a4e5e6a | 1359 | name = "adt7461a"; |
8f2fa77c JD |
1360 | } |
1361 | } else | |
1362 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1363 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1364 | |
1365 | /* | |
1366 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1367 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1368 | * exists, both readings will reflect the same value. Otherwise, | |
1369 | * the readings will be different. | |
1370 | */ | |
b2589ab0 JD |
1371 | emerg = i2c_smbus_read_byte_data(client, |
1372 | MAX6659_REG_R_REMOTE_EMERG); | |
1373 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1374 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1375 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1376 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1377 | status2 = i2c_smbus_read_byte_data(client, |
1378 | MAX6696_REG_R_STATUS2); | |
1379 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1380 | return -ENODEV; |
1381 | ||
8f2fa77c JD |
1382 | /* |
1383 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1384 | * register. Reading from that address will return the last | |
1385 | * read value, which in our case is those of the man_id | |
1386 | * register. Likewise, the config1 register seems to lack a | |
1387 | * low nibble, so the value will be those of the previous | |
1388 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1389 | * MAX6659 has a third set of upper temperature limit registers. |
1390 | * Those registers also return values on MAX6657 and MAX6658, | |
1391 | * thus the only way to detect MAX6659 is by its address. | |
1392 | * For this reason it will be mis-detected as MAX6657 if its | |
1393 | * address is 0x4C. | |
8f2fa77c JD |
1394 | */ |
1395 | if (chip_id == man_id | |
13c84951 | 1396 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1397 | && (config1 & 0x1F) == (man_id & 0x0F) |
1398 | && convrate <= 0x09) { | |
13c84951 GR |
1399 | if (address == 0x4C) |
1400 | name = "max6657"; | |
1401 | else | |
1402 | name = "max6659"; | |
8f2fa77c | 1403 | } else |
06e1c0a2 GR |
1404 | /* |
1405 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1406 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1407 | * register is unused and should return zero when read. Bit 0 of | |
1408 | * the status2 register is unused and should return zero when | |
1409 | * read. | |
1410 | * | |
1411 | * MAX6695 and MAX6696 have an additional set of temperature | |
1412 | * limit registers. We can detect those chips by checking if | |
1413 | * one of those registers exists. | |
1414 | */ | |
1415 | if (chip_id == 0x01 | |
b2589ab0 JD |
1416 | && (config1 & 0x10) == 0x00 |
1417 | && (status2 & 0x01) == 0x00 | |
1418 | && emerg == emerg2 | |
1419 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1420 | name = "max6696"; |
1421 | } else | |
8f2fa77c JD |
1422 | /* |
1423 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1424 | * revision of the chip. The lowest bit of the config1 register | |
1425 | * is unused and should return zero when read, so should the | |
1426 | * second to last bit of config1 (software reset). | |
1427 | */ | |
1428 | if (chip_id == 0x01 | |
b2589ab0 JD |
1429 | && (config1 & 0x03) == 0x00 |
1430 | && convrate <= 0x07) { | |
8f2fa77c JD |
1431 | name = "max6680"; |
1432 | } else | |
1433 | /* | |
1434 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1435 | * revision of the chip. The lowest 6 bits of the config1 | |
1436 | * register are unused and should return zero when read. | |
1437 | */ | |
1438 | if (chip_id == 0x59 | |
b2589ab0 JD |
1439 | && (config1 & 0x3f) == 0x00 |
1440 | && convrate <= 0x07) { | |
8f2fa77c | 1441 | name = "max6646"; |
1da177e4 | 1442 | } |
6771ea1f JD |
1443 | } else |
1444 | if (address == 0x4C | |
1445 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1446 | if ((config1 & 0x2A) == 0x00 |
1447 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1448 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1449 | && convrate <= 0x09) { |
c4f99a2b JD |
1450 | name = "w83l771"; |
1451 | } else | |
1452 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1453 | && convrate <= 0x08) { |
c4f99a2b JD |
1454 | name = "w83l771"; |
1455 | } | |
6771ea1f | 1456 | } |
2ef01793 | 1457 | } else |
6d101c58 JD |
1458 | if (address >= 0x48 && address <= 0x4F |
1459 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1460 | if (chip_id == 0x00 |
b2589ab0 JD |
1461 | && (config1 & 0x2A) == 0x00 |
1462 | && (config2 & 0xFE) == 0x00 | |
1463 | && convrate <= 0x09) { | |
2ef01793 SD |
1464 | name = "sa56004"; |
1465 | } | |
ae544f64 GR |
1466 | } else |
1467 | if ((address == 0x4C || address == 0x4D) | |
1468 | && man_id == 0x47) { /* GMT */ | |
1469 | if (chip_id == 0x01 /* G781 */ | |
1470 | && (config1 & 0x3F) == 0x00 | |
1471 | && convrate <= 0x08) | |
1472 | name = "g781"; | |
1daaceb2 WN |
1473 | } else |
1474 | if (address == 0x4C | |
1475 | && man_id == 0x55) { /* Texas Instruments */ | |
1476 | int local_ext; | |
1477 | ||
1478 | local_ext = i2c_smbus_read_byte_data(client, | |
1479 | TMP451_REG_R_LOCAL_TEMPL); | |
1480 | ||
1481 | if (chip_id == 0x00 /* TMP451 */ | |
1482 | && (config1 & 0x1B) == 0x00 | |
1483 | && convrate <= 0x09 | |
1484 | && (local_ext & 0x0F) == 0x00) | |
1485 | name = "tmp451"; | |
1da177e4 LT |
1486 | } |
1487 | ||
8f2fa77c JD |
1488 | if (!name) { /* identification failed */ |
1489 | dev_dbg(&adapter->dev, | |
1490 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1491 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1492 | return -ENODEV; | |
1da177e4 | 1493 | } |
8f2fa77c | 1494 | |
9b0e8526 JD |
1495 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1496 | ||
1497 | return 0; | |
1498 | } | |
1499 | ||
1f17a444 | 1500 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1501 | { |
1f17a444 GR |
1502 | struct lm90_data *data = _data; |
1503 | struct i2c_client *client = data->client; | |
1504 | ||
f7001bb0 GR |
1505 | /* Restore initial configuration */ |
1506 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1507 | data->convrate_orig); | |
1508 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1509 | data->config_orig); | |
1510 | } | |
1511 | ||
37ad04d7 | 1512 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1513 | { |
37ad04d7 | 1514 | int config, convrate; |
15b66ab6 | 1515 | |
37ad04d7 GR |
1516 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1517 | if (convrate < 0) | |
1518 | return convrate; | |
0c01b644 GR |
1519 | data->convrate_orig = convrate; |
1520 | ||
15b66ab6 GR |
1521 | /* |
1522 | * Start the conversions. | |
1523 | */ | |
0c01b644 | 1524 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
37ad04d7 GR |
1525 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1526 | if (config < 0) | |
1527 | return config; | |
15b66ab6 GR |
1528 | data->config_orig = config; |
1529 | ||
1530 | /* Check Temperature Range Select */ | |
1daaceb2 | 1531 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1532 | if (config & 0x04) |
1533 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1538 | * 0.125 degree resolution) and range (0x08, extend range | |
1539 | * to -64 degree) mode for the remote temperature sensor. | |
1540 | */ | |
1541 | if (data->kind == max6680) | |
1542 | config |= 0x18; | |
1543 | ||
1544 | /* | |
1545 | * Select external channel 0 for max6695/96 | |
1546 | */ | |
1547 | if (data->kind == max6696) | |
1548 | config &= ~0x08; | |
1549 | ||
1550 | config &= 0xBF; /* run */ | |
1551 | if (config != data->config_orig) /* Only write if changed */ | |
1552 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1f17a444 GR |
1553 | |
1554 | devm_add_action(&client->dev, lm90_restore_conf, data); | |
37ad04d7 GR |
1555 | |
1556 | return 0; | |
15b66ab6 GR |
1557 | } |
1558 | ||
072de496 WN |
1559 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1560 | { | |
1561 | struct lm90_data *data = i2c_get_clientdata(client); | |
37ad04d7 | 1562 | int st, st2 = 0; |
072de496 | 1563 | |
37ad04d7 GR |
1564 | st = lm90_read_reg(client, LM90_REG_R_STATUS); |
1565 | if (st < 0) | |
1566 | return false; | |
072de496 | 1567 | |
37ad04d7 GR |
1568 | if (data->kind == max6696) { |
1569 | st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
1570 | if (st2 < 0) | |
1571 | return false; | |
1572 | } | |
072de496 WN |
1573 | |
1574 | *status = st | (st2 << 8); | |
1575 | ||
1576 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1577 | return false; | |
1578 | ||
1579 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1580 | (st2 & MAX6696_STATUS2_LOT2)) | |
1581 | dev_warn(&client->dev, | |
1582 | "temp%d out of range, please check!\n", 1); | |
1583 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1584 | (st2 & MAX6696_STATUS2_ROT2)) | |
1585 | dev_warn(&client->dev, | |
1586 | "temp%d out of range, please check!\n", 2); | |
1587 | if (st & LM90_STATUS_ROPEN) | |
1588 | dev_warn(&client->dev, | |
1589 | "temp%d diode open, please check!\n", 2); | |
1590 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1591 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1592 | dev_warn(&client->dev, | |
1593 | "temp%d out of range, please check!\n", 3); | |
1594 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1595 | dev_warn(&client->dev, | |
1596 | "temp%d diode open, please check!\n", 3); | |
1597 | ||
1598 | return true; | |
1599 | } | |
1600 | ||
109b1283 WN |
1601 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1602 | { | |
1603 | struct i2c_client *client = dev_id; | |
1604 | u16 status; | |
1605 | ||
1606 | if (lm90_is_tripped(client, &status)) | |
1607 | return IRQ_HANDLED; | |
1608 | else | |
1609 | return IRQ_NONE; | |
1610 | } | |
1611 | ||
1f17a444 GR |
1612 | static void lm90_remove_pec(void *dev) |
1613 | { | |
1614 | device_remove_file(dev, &dev_attr_pec); | |
1615 | } | |
1616 | ||
1617 | static void lm90_regulator_disable(void *regulator) | |
1618 | { | |
1619 | regulator_disable(regulator); | |
1620 | } | |
1621 | ||
b2589ab0 | 1622 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1623 | const struct i2c_device_id *id) |
1624 | { | |
b2589ab0 JD |
1625 | struct device *dev = &client->dev; |
1626 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
9b0e8526 | 1627 | struct lm90_data *data; |
3e0f964f | 1628 | struct regulator *regulator; |
6e5f62b9 | 1629 | struct device *hwmon_dev; |
084489e6 | 1630 | int groups = 0; |
9b0e8526 | 1631 | int err; |
1da177e4 | 1632 | |
3e0f964f WN |
1633 | regulator = devm_regulator_get(dev, "vcc"); |
1634 | if (IS_ERR(regulator)) | |
1635 | return PTR_ERR(regulator); | |
1636 | ||
1637 | err = regulator_enable(regulator); | |
1638 | if (err < 0) { | |
d89fa686 | 1639 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1640 | return err; |
1641 | } | |
1642 | ||
1f17a444 GR |
1643 | devm_add_action(dev, lm90_regulator_disable, regulator); |
1644 | ||
d89fa686 | 1645 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1646 | if (!data) |
1647 | return -ENOMEM; | |
1648 | ||
1de8b250 | 1649 | data->client = client; |
b2589ab0 | 1650 | i2c_set_clientdata(client, data); |
9a61bf63 | 1651 | mutex_init(&data->update_lock); |
1da177e4 | 1652 | |
9b0e8526 JD |
1653 | /* Set the device type */ |
1654 | data->kind = id->driver_data; | |
1655 | if (data->kind == adm1032) { | |
1656 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1657 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1658 | } |
1da177e4 | 1659 | |
f36ffeab GR |
1660 | /* |
1661 | * Different devices have different alarm bits triggering the | |
1662 | * ALERT# output | |
1663 | */ | |
4667bcb8 | 1664 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1665 | |
88073bb1 | 1666 | /* Set chip capabilities */ |
4667bcb8 | 1667 | data->flags = lm90_params[data->kind].flags; |
a095f687 | 1668 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1669 | |
0c01b644 GR |
1670 | /* Set maximum conversion rate */ |
1671 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1672 | ||
1da177e4 | 1673 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
1674 | err = lm90_init_client(client, data); |
1675 | if (err < 0) { | |
1676 | dev_err(dev, "Failed to initialize device\n"); | |
1677 | return err; | |
1678 | } | |
1da177e4 LT |
1679 | |
1680 | /* Register sysfs hooks */ | |
084489e6 GR |
1681 | data->groups[groups++] = &lm90_group; |
1682 | ||
1683 | if (data->flags & LM90_HAVE_OFFSET) | |
1684 | data->groups[groups++] = &lm90_temp2_offset_group; | |
1685 | ||
1686 | if (data->flags & LM90_HAVE_EMERGENCY) | |
1687 | data->groups[groups++] = &lm90_emergency_group; | |
1688 | ||
1689 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) | |
1690 | data->groups[groups++] = &lm90_emergency_alarm_group; | |
1691 | ||
1692 | if (data->flags & LM90_HAVE_TEMP3) | |
1693 | data->groups[groups++] = &lm90_temp3_group; | |
1694 | ||
b2589ab0 JD |
1695 | if (client->flags & I2C_CLIENT_PEC) { |
1696 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1697 | if (err) |
1f17a444 GR |
1698 | return err; |
1699 | devm_add_action(dev, lm90_remove_pec, dev); | |
06e1c0a2 | 1700 | } |
0e39e01c | 1701 | |
6e5f62b9 GR |
1702 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
1703 | data, data->groups); | |
1704 | if (IS_ERR(hwmon_dev)) | |
1705 | return PTR_ERR(hwmon_dev); | |
943b0830 | 1706 | |
109b1283 WN |
1707 | if (client->irq) { |
1708 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1709 | err = devm_request_threaded_irq(dev, client->irq, | |
1710 | NULL, lm90_irq_thread, | |
1711 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1712 | "lm90", client); | |
1713 | if (err < 0) { | |
1714 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 1715 | return err; |
109b1283 WN |
1716 | } |
1717 | } | |
1718 | ||
1da177e4 LT |
1719 | return 0; |
1720 | } | |
1721 | ||
53de3342 JD |
1722 | static void lm90_alert(struct i2c_client *client, unsigned int flag) |
1723 | { | |
072de496 | 1724 | u16 alarms; |
06e1c0a2 | 1725 | |
072de496 | 1726 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1727 | /* |
1728 | * Disable ALERT# output, because these chips don't implement | |
1729 | * SMBus alert correctly; they should only hold the alert line | |
1730 | * low briefly. | |
1731 | */ | |
072de496 WN |
1732 | struct lm90_data *data = i2c_get_clientdata(client); |
1733 | ||
37ad04d7 GR |
1734 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
1735 | (alarms & data->alert_alarms)) { | |
1736 | int config; | |
1737 | ||
53de3342 | 1738 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
37ad04d7 GR |
1739 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1740 | if (config >= 0) | |
1741 | i2c_smbus_write_byte_data(client, | |
1742 | LM90_REG_W_CONFIG1, | |
1743 | config | 0x80); | |
53de3342 | 1744 | } |
072de496 WN |
1745 | } else { |
1746 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1747 | } |
1748 | } | |
1749 | ||
15b66ab6 GR |
1750 | static struct i2c_driver lm90_driver = { |
1751 | .class = I2C_CLASS_HWMON, | |
1752 | .driver = { | |
1753 | .name = "lm90", | |
1754 | }, | |
1755 | .probe = lm90_probe, | |
15b66ab6 GR |
1756 | .alert = lm90_alert, |
1757 | .id_table = lm90_id, | |
1758 | .detect = lm90_detect, | |
1759 | .address_list = normal_i2c, | |
1760 | }; | |
1da177e4 | 1761 | |
f0967eea | 1762 | module_i2c_driver(lm90_driver); |
1da177e4 | 1763 | |
7c81c60f | 1764 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1765 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1766 | MODULE_LICENSE("GPL"); |