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