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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> | |
943b0830 MH |
92 | #include <linux/hwmon.h> |
93 | #include <linux/err.h> | |
9a61bf63 | 94 | #include <linux/mutex.h> |
0e39e01c | 95 | #include <linux/sysfs.h> |
109b1283 | 96 | #include <linux/interrupt.h> |
3e0f964f | 97 | #include <linux/regulator/consumer.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_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ |
174 | ||
1daaceb2 WN |
175 | /* TMP451 registers */ |
176 | #define TMP451_REG_R_LOCAL_TEMPL 0x15 | |
177 | ||
23b2d477 NC |
178 | /* |
179 | * Device flags | |
180 | */ | |
88073bb1 GR |
181 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
182 | /* Device features */ | |
183 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 184 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 185 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
186 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
187 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 188 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
23b2d477 | 189 | |
072de496 WN |
190 | /* LM90 status */ |
191 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
192 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
193 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
194 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
195 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
196 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
197 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
198 | ||
199 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
200 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
201 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
202 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
203 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
204 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
205 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
206 | ||
1da177e4 LT |
207 | /* |
208 | * Driver data (common to all clients) | |
209 | */ | |
210 | ||
9b0e8526 JD |
211 | static const struct i2c_device_id lm90_id[] = { |
212 | { "adm1032", adm1032 }, | |
213 | { "adt7461", adt7461 }, | |
5a4e5e6a | 214 | { "adt7461a", adt7461 }, |
ae544f64 | 215 | { "g781", g781 }, |
9b0e8526 JD |
216 | { "lm90", lm90 }, |
217 | { "lm86", lm86 }, | |
97ae60bb JD |
218 | { "lm89", lm86 }, |
219 | { "lm99", lm99 }, | |
271dabf5 BH |
220 | { "max6646", max6646 }, |
221 | { "max6647", max6646 }, | |
222 | { "max6649", max6646 }, | |
9b0e8526 JD |
223 | { "max6657", max6657 }, |
224 | { "max6658", max6657 }, | |
13c84951 | 225 | { "max6659", max6659 }, |
9b0e8526 JD |
226 | { "max6680", max6680 }, |
227 | { "max6681", max6680 }, | |
06e1c0a2 GR |
228 | { "max6695", max6696 }, |
229 | { "max6696", max6696 }, | |
5a4e5e6a | 230 | { "nct1008", adt7461 }, |
6771ea1f | 231 | { "w83l771", w83l771 }, |
2ef01793 | 232 | { "sa56004", sa56004 }, |
1daaceb2 | 233 | { "tmp451", tmp451 }, |
9b0e8526 JD |
234 | { } |
235 | }; | |
236 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
237 | ||
4667bcb8 GR |
238 | /* |
239 | * chip type specific parameters | |
240 | */ | |
241 | struct lm90_params { | |
242 | u32 flags; /* Capabilities */ | |
243 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
244 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 245 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 246 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
247 | }; |
248 | ||
249 | static const struct lm90_params lm90_params[] = { | |
250 | [adm1032] = { | |
1179324c GR |
251 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
252 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 253 | .alert_alarms = 0x7c, |
0c01b644 | 254 | .max_convrate = 10, |
4667bcb8 GR |
255 | }, |
256 | [adt7461] = { | |
1179324c GR |
257 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
258 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 259 | .alert_alarms = 0x7c, |
0c01b644 | 260 | .max_convrate = 10, |
4667bcb8 | 261 | }, |
ae544f64 GR |
262 | [g781] = { |
263 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
264 | | LM90_HAVE_BROKEN_ALERT, | |
265 | .alert_alarms = 0x7c, | |
266 | .max_convrate = 8, | |
267 | }, | |
4667bcb8 GR |
268 | [lm86] = { |
269 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
270 | .alert_alarms = 0x7b, | |
0c01b644 | 271 | .max_convrate = 9, |
4667bcb8 GR |
272 | }, |
273 | [lm90] = { | |
274 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
275 | .alert_alarms = 0x7b, | |
0c01b644 | 276 | .max_convrate = 9, |
4667bcb8 GR |
277 | }, |
278 | [lm99] = { | |
279 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
280 | .alert_alarms = 0x7b, | |
0c01b644 | 281 | .max_convrate = 9, |
4667bcb8 GR |
282 | }, |
283 | [max6646] = { | |
4667bcb8 | 284 | .alert_alarms = 0x7c, |
0c01b644 | 285 | .max_convrate = 6, |
2ef01793 | 286 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
287 | }, |
288 | [max6657] = { | |
4667bcb8 | 289 | .alert_alarms = 0x7c, |
0c01b644 | 290 | .max_convrate = 8, |
2ef01793 | 291 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
292 | }, |
293 | [max6659] = { | |
a095f687 | 294 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 295 | .alert_alarms = 0x7c, |
0c01b644 | 296 | .max_convrate = 8, |
2ef01793 | 297 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
298 | }, |
299 | [max6680] = { | |
300 | .flags = LM90_HAVE_OFFSET, | |
301 | .alert_alarms = 0x7c, | |
0c01b644 | 302 | .max_convrate = 7, |
4667bcb8 GR |
303 | }, |
304 | [max6696] = { | |
a095f687 | 305 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 306 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 307 | .alert_alarms = 0x1c7c, |
0c01b644 | 308 | .max_convrate = 6, |
2ef01793 | 309 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
310 | }, |
311 | [w83l771] = { | |
312 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
313 | .alert_alarms = 0x7c, | |
0c01b644 | 314 | .max_convrate = 8, |
4667bcb8 | 315 | }, |
2ef01793 | 316 | [sa56004] = { |
a095f687 | 317 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
318 | .alert_alarms = 0x7b, |
319 | .max_convrate = 9, | |
320 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
321 | }, | |
1daaceb2 WN |
322 | [tmp451] = { |
323 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
324 | | LM90_HAVE_BROKEN_ALERT, | |
325 | .alert_alarms = 0x7c, | |
326 | .max_convrate = 9, | |
327 | .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL, | |
eb1c8f43 | 328 | }, |
4667bcb8 GR |
329 | }; |
330 | ||
40465d94 WN |
331 | /* |
332 | * TEMP8 register index | |
333 | */ | |
334 | enum lm90_temp8_reg_index { | |
335 | LOCAL_LOW = 0, | |
336 | LOCAL_HIGH, | |
337 | LOCAL_CRIT, | |
338 | REMOTE_CRIT, | |
339 | LOCAL_EMERG, /* max6659 and max6695/96 */ | |
340 | REMOTE_EMERG, /* max6659 and max6695/96 */ | |
341 | REMOTE2_CRIT, /* max6695/96 only */ | |
342 | REMOTE2_EMERG, /* max6695/96 only */ | |
343 | TEMP8_REG_NUM | |
344 | }; | |
345 | ||
346 | /* | |
347 | * TEMP11 register index | |
348 | */ | |
349 | enum lm90_temp11_reg_index { | |
350 | REMOTE_TEMP = 0, | |
351 | REMOTE_LOW, | |
352 | REMOTE_HIGH, | |
353 | REMOTE_OFFSET, /* except max6646, max6657/58/59, and max6695/96 */ | |
354 | LOCAL_TEMP, | |
355 | REMOTE2_TEMP, /* max6695/96 only */ | |
356 | REMOTE2_LOW, /* max6695/96 only */ | |
357 | REMOTE2_HIGH, /* max6695/96 only */ | |
358 | TEMP11_REG_NUM | |
359 | }; | |
360 | ||
1da177e4 LT |
361 | /* |
362 | * Client data (each client gets its own) | |
363 | */ | |
364 | ||
365 | struct lm90_data { | |
1de8b250 | 366 | struct i2c_client *client; |
eb1c8f43 GR |
367 | u32 channel_config[4]; |
368 | struct hwmon_channel_info temp_info; | |
369 | const struct hwmon_channel_info *info[3]; | |
370 | struct hwmon_chip_info chip; | |
9a61bf63 | 371 | struct mutex update_lock; |
2f83ab77 | 372 | bool valid; /* true if register values are valid */ |
1da177e4 LT |
373 | unsigned long last_updated; /* in jiffies */ |
374 | int kind; | |
4667bcb8 | 375 | u32 flags; |
1da177e4 | 376 | |
38bab98a | 377 | unsigned int update_interval; /* in milliseconds */ |
0c01b644 | 378 | |
95238364 | 379 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 380 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
381 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
382 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 383 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 384 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 385 | |
1da177e4 | 386 | /* registers values */ |
40465d94 WN |
387 | s8 temp8[TEMP8_REG_NUM]; |
388 | s16 temp11[TEMP11_REG_NUM]; | |
1da177e4 | 389 | u8 temp_hyst; |
06e1c0a2 | 390 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
391 | }; |
392 | ||
15b66ab6 GR |
393 | /* |
394 | * Support functions | |
395 | */ | |
396 | ||
397 | /* | |
398 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
399 | * to explicitly ask for a transaction without PEC. | |
400 | */ | |
401 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
402 | { | |
403 | return i2c_smbus_xfer(client->adapter, client->addr, | |
404 | client->flags & ~I2C_CLIENT_PEC, | |
405 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
406 | } | |
407 | ||
408 | /* | |
409 | * It is assumed that client->update_lock is held (unless we are in | |
410 | * detection or initialization steps). This matters when PEC is enabled, | |
411 | * because we don't want the address pointer to change between the write | |
412 | * byte and the read byte transactions. | |
413 | */ | |
37ad04d7 | 414 | static int lm90_read_reg(struct i2c_client *client, u8 reg) |
15b66ab6 GR |
415 | { |
416 | int err; | |
417 | ||
418 | if (client->flags & I2C_CLIENT_PEC) { | |
419 | err = adm1032_write_byte(client, reg); | |
420 | if (err >= 0) | |
421 | err = i2c_smbus_read_byte(client); | |
422 | } else | |
423 | err = i2c_smbus_read_byte_data(client, reg); | |
424 | ||
37ad04d7 | 425 | return err; |
15b66ab6 GR |
426 | } |
427 | ||
37ad04d7 | 428 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl) |
15b66ab6 | 429 | { |
37ad04d7 | 430 | int oldh, newh, l; |
15b66ab6 GR |
431 | |
432 | /* | |
433 | * There is a trick here. We have to read two registers to have the | |
434 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 435 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
436 | * the one-shot conversion register, which we don't want to do |
437 | * (disables hardware monitoring) or monitor the busy bit, which is | |
438 | * impossible (we can't read the values and monitor that bit at the | |
439 | * exact same time). So the solution used here is to read the high | |
440 | * byte once, then the low byte, then the high byte again. If the new | |
441 | * high byte matches the old one, then we have a valid reading. Else | |
442 | * we have to read the low byte again, and now we believe we have a | |
443 | * correct reading. | |
444 | */ | |
37ad04d7 GR |
445 | oldh = lm90_read_reg(client, regh); |
446 | if (oldh < 0) | |
447 | return oldh; | |
448 | l = lm90_read_reg(client, regl); | |
449 | if (l < 0) | |
450 | return l; | |
451 | newh = lm90_read_reg(client, regh); | |
452 | if (newh < 0) | |
453 | return newh; | |
15b66ab6 | 454 | if (oldh != newh) { |
37ad04d7 GR |
455 | l = lm90_read_reg(client, regl); |
456 | if (l < 0) | |
457 | return l; | |
15b66ab6 | 458 | } |
37ad04d7 | 459 | return (newh << 8) | l; |
15b66ab6 GR |
460 | } |
461 | ||
462 | /* | |
463 | * client->update_lock must be held when calling this function (unless we are | |
464 | * in detection or initialization steps), and while a remote channel other | |
465 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
466 | * external channel 0 before releasing the lock. This is necessary because | |
467 | * various registers have different meanings as a result of selecting a | |
468 | * non-default remote channel. | |
469 | */ | |
37ad04d7 GR |
470 | static inline int lm90_select_remote_channel(struct i2c_client *client, |
471 | struct lm90_data *data, | |
472 | int channel) | |
15b66ab6 | 473 | { |
37ad04d7 | 474 | int config; |
15b66ab6 GR |
475 | |
476 | if (data->kind == max6696) { | |
37ad04d7 GR |
477 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
478 | if (config < 0) | |
479 | return config; | |
15b66ab6 GR |
480 | config &= ~0x08; |
481 | if (channel) | |
482 | config |= 0x08; | |
483 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
484 | config); | |
485 | } | |
37ad04d7 | 486 | return 0; |
15b66ab6 GR |
487 | } |
488 | ||
0c01b644 GR |
489 | /* |
490 | * Set conversion rate. | |
491 | * client->update_lock must be held when calling this function (unless we are | |
492 | * in detection or initialization steps). | |
493 | */ | |
eb1c8f43 GR |
494 | static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, |
495 | unsigned int interval) | |
0c01b644 | 496 | { |
0c01b644 | 497 | unsigned int update_interval; |
eb1c8f43 | 498 | int i, err; |
0c01b644 GR |
499 | |
500 | /* Shift calculations to avoid rounding errors */ | |
501 | interval <<= 6; | |
502 | ||
503 | /* find the nearest update rate */ | |
504 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
505 | i < data->max_convrate; i++, update_interval >>= 1) | |
506 | if (interval >= update_interval * 3 / 4) | |
507 | break; | |
508 | ||
eb1c8f43 | 509 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); |
0c01b644 | 510 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); |
eb1c8f43 | 511 | return err; |
0c01b644 GR |
512 | } |
513 | ||
10bfef47 GR |
514 | static int lm90_update_limits(struct device *dev) |
515 | { | |
516 | struct lm90_data *data = dev_get_drvdata(dev); | |
517 | struct i2c_client *client = data->client; | |
518 | int val; | |
519 | ||
520 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT); | |
521 | if (val < 0) | |
522 | return val; | |
523 | data->temp8[LOCAL_CRIT] = val; | |
524 | ||
525 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
526 | if (val < 0) | |
527 | return val; | |
528 | data->temp8[REMOTE_CRIT] = val; | |
529 | ||
530 | val = lm90_read_reg(client, LM90_REG_R_TCRIT_HYST); | |
531 | if (val < 0) | |
532 | return val; | |
533 | data->temp_hyst = val; | |
534 | ||
be9d6374 | 535 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); |
10bfef47 GR |
536 | if (val < 0) |
537 | return val; | |
538 | data->temp11[REMOTE_LOW] = val << 8; | |
539 | ||
540 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
541 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL); | |
542 | if (val < 0) | |
543 | return val; | |
544 | data->temp11[REMOTE_LOW] |= val; | |
545 | } | |
546 | ||
547 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
548 | if (val < 0) | |
549 | return val; | |
550 | data->temp11[REMOTE_HIGH] = val << 8; | |
551 | ||
552 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) { | |
553 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL); | |
554 | if (val < 0) | |
555 | return val; | |
556 | data->temp11[REMOTE_HIGH] |= val; | |
557 | } | |
558 | ||
559 | if (data->flags & LM90_HAVE_OFFSET) { | |
560 | val = lm90_read16(client, LM90_REG_R_REMOTE_OFFSH, | |
561 | LM90_REG_R_REMOTE_OFFSL); | |
562 | if (val < 0) | |
563 | return val; | |
564 | data->temp11[REMOTE_OFFSET] = val; | |
565 | } | |
566 | ||
567 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
568 | val = lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG); | |
569 | if (val < 0) | |
570 | return val; | |
571 | data->temp8[LOCAL_EMERG] = val; | |
572 | ||
573 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
574 | if (val < 0) | |
575 | return val; | |
576 | data->temp8[REMOTE_EMERG] = val; | |
577 | } | |
578 | ||
579 | if (data->kind == max6696) { | |
580 | val = lm90_select_remote_channel(client, data, 1); | |
581 | if (val < 0) | |
582 | return val; | |
583 | ||
584 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT); | |
585 | if (val < 0) | |
586 | return val; | |
587 | data->temp8[REMOTE2_CRIT] = val; | |
588 | ||
589 | val = lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG); | |
590 | if (val < 0) | |
591 | return val; | |
592 | data->temp8[REMOTE2_EMERG] = val; | |
593 | ||
594 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH); | |
595 | if (val < 0) | |
596 | return val; | |
597 | data->temp11[REMOTE2_LOW] = val << 8; | |
598 | ||
599 | val = lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH); | |
600 | if (val < 0) | |
601 | return val; | |
602 | data->temp11[REMOTE2_HIGH] = val << 8; | |
603 | ||
604 | lm90_select_remote_channel(client, data, 0); | |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
eb1c8f43 | 610 | static int lm90_update_device(struct device *dev) |
15b66ab6 | 611 | { |
1de8b250 GR |
612 | struct lm90_data *data = dev_get_drvdata(dev); |
613 | struct i2c_client *client = data->client; | |
0c01b644 | 614 | unsigned long next_update; |
eb1c8f43 | 615 | int val; |
15b66ab6 | 616 | |
10bfef47 GR |
617 | if (!data->valid) { |
618 | val = lm90_update_limits(dev); | |
619 | if (val < 0) | |
eb1c8f43 | 620 | return val; |
10bfef47 GR |
621 | } |
622 | ||
78c2c2fe JD |
623 | next_update = data->last_updated + |
624 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 625 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 | 626 | dev_dbg(&client->dev, "Updating lm90 data.\n"); |
10bfef47 | 627 | |
2f83ab77 | 628 | data->valid = false; |
10bfef47 | 629 | |
37ad04d7 GR |
630 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_LOW); |
631 | if (val < 0) | |
eb1c8f43 | 632 | return val; |
37ad04d7 GR |
633 | data->temp8[LOCAL_LOW] = val; |
634 | ||
635 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH); | |
636 | if (val < 0) | |
eb1c8f43 | 637 | return val; |
37ad04d7 GR |
638 | data->temp8[LOCAL_HIGH] = val; |
639 | ||
a095f687 | 640 | if (data->reg_local_ext) { |
37ad04d7 GR |
641 | val = lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
642 | data->reg_local_ext); | |
643 | if (val < 0) | |
eb1c8f43 | 644 | return val; |
37ad04d7 | 645 | data->temp11[LOCAL_TEMP] = val; |
15b66ab6 | 646 | } else { |
37ad04d7 GR |
647 | val = lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP); |
648 | if (val < 0) | |
eb1c8f43 | 649 | return val; |
37ad04d7 | 650 | data->temp11[LOCAL_TEMP] = val << 8; |
15b66ab6 | 651 | } |
37ad04d7 GR |
652 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
653 | LM90_REG_R_REMOTE_TEMPL); | |
654 | if (val < 0) | |
eb1c8f43 | 655 | return val; |
37ad04d7 GR |
656 | data->temp11[REMOTE_TEMP] = val; |
657 | ||
37ad04d7 GR |
658 | val = lm90_read_reg(client, LM90_REG_R_STATUS); |
659 | if (val < 0) | |
eb1c8f43 | 660 | return val; |
37ad04d7 | 661 | data->alarms = val; /* lower 8 bit of alarms */ |
15b66ab6 GR |
662 | |
663 | if (data->kind == max6696) { | |
37ad04d7 GR |
664 | val = lm90_select_remote_channel(client, data, 1); |
665 | if (val < 0) | |
eb1c8f43 | 666 | return val; |
37ad04d7 | 667 | |
37ad04d7 GR |
668 | val = lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, |
669 | LM90_REG_R_REMOTE_TEMPL); | |
eb1c8f43 GR |
670 | if (val < 0) { |
671 | lm90_select_remote_channel(client, data, 0); | |
672 | return val; | |
673 | } | |
37ad04d7 GR |
674 | data->temp11[REMOTE2_TEMP] = val; |
675 | ||
15b66ab6 GR |
676 | lm90_select_remote_channel(client, data, 0); |
677 | ||
37ad04d7 GR |
678 | val = lm90_read_reg(client, MAX6696_REG_R_STATUS2); |
679 | if (val < 0) | |
eb1c8f43 | 680 | return val; |
37ad04d7 | 681 | data->alarms |= val << 8; |
15b66ab6 GR |
682 | } |
683 | ||
f36ffeab GR |
684 | /* |
685 | * Re-enable ALERT# output if it was originally enabled and | |
686 | * relevant alarms are all clear | |
687 | */ | |
37ad04d7 GR |
688 | if (!(data->config_orig & 0x80) && |
689 | !(data->alarms & data->alert_alarms)) { | |
690 | val = lm90_read_reg(client, LM90_REG_R_CONFIG1); | |
691 | if (val < 0) | |
eb1c8f43 | 692 | return val; |
15b66ab6 | 693 | |
37ad04d7 | 694 | if (val & 0x80) { |
15b66ab6 GR |
695 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); |
696 | i2c_smbus_write_byte_data(client, | |
697 | LM90_REG_W_CONFIG1, | |
37ad04d7 | 698 | val & ~0x80); |
15b66ab6 GR |
699 | } |
700 | } | |
701 | ||
702 | data->last_updated = jiffies; | |
2f83ab77 | 703 | data->valid = true; |
15b66ab6 GR |
704 | } |
705 | ||
eb1c8f43 | 706 | return 0; |
15b66ab6 GR |
707 | } |
708 | ||
cea50fe2 NC |
709 | /* |
710 | * Conversions | |
711 | * For local temperatures and limits, critical limits and the hysteresis | |
712 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
713 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
714 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
715 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
716 | */ |
717 | ||
9d4d3834 | 718 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
719 | { |
720 | return val * 1000; | |
721 | } | |
722 | ||
271dabf5 BH |
723 | static inline int temp_from_u8(u8 val) |
724 | { | |
725 | return val * 1000; | |
726 | } | |
727 | ||
9d4d3834 | 728 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
729 | { |
730 | return val / 32 * 125; | |
731 | } | |
732 | ||
271dabf5 BH |
733 | static inline int temp_from_u16(u16 val) |
734 | { | |
735 | return val / 32 * 125; | |
736 | } | |
737 | ||
9d4d3834 | 738 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
739 | { |
740 | if (val <= -128000) | |
741 | return -128; | |
742 | if (val >= 127000) | |
743 | return 127; | |
744 | if (val < 0) | |
745 | return (val - 500) / 1000; | |
746 | return (val + 500) / 1000; | |
747 | } | |
748 | ||
271dabf5 BH |
749 | static u8 temp_to_u8(long val) |
750 | { | |
751 | if (val <= 0) | |
752 | return 0; | |
753 | if (val >= 255000) | |
754 | return 255; | |
755 | return (val + 500) / 1000; | |
756 | } | |
757 | ||
9d4d3834 | 758 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
759 | { |
760 | if (val <= -128000) | |
761 | return 0x8000; | |
762 | if (val >= 127875) | |
763 | return 0x7FE0; | |
764 | if (val < 0) | |
765 | return (val - 62) / 125 * 32; | |
766 | return (val + 62) / 125 * 32; | |
767 | } | |
768 | ||
769 | static u8 hyst_to_reg(long val) | |
770 | { | |
771 | if (val <= 0) | |
772 | return 0; | |
773 | if (val >= 30500) | |
774 | return 31; | |
775 | return (val + 500) / 1000; | |
776 | } | |
777 | ||
778 | /* | |
23b2d477 NC |
779 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
780 | * attempts to write values that are outside the range 0 < temp < 127 are | |
781 | * treated as the boundary value. | |
782 | * | |
783 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
784 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 785 | */ |
9d4d3834 | 786 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 787 | { |
23b2d477 NC |
788 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
789 | return (val - 64) * 1000; | |
589f707c | 790 | return temp_from_s8(val); |
cea50fe2 NC |
791 | } |
792 | ||
9d4d3834 | 793 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 794 | { |
23b2d477 NC |
795 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
796 | return (val - 0x4000) / 64 * 250; | |
589f707c | 797 | return temp_from_s16(val); |
23b2d477 NC |
798 | } |
799 | ||
9d4d3834 | 800 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
801 | { |
802 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
803 | if (val <= -64000) | |
804 | return 0; | |
805 | if (val >= 191000) | |
806 | return 0xFF; | |
807 | return (val + 500 + 64000) / 1000; | |
23b2d477 | 808 | } |
589f707c GR |
809 | if (val <= 0) |
810 | return 0; | |
811 | if (val >= 127000) | |
812 | return 127; | |
813 | return (val + 500) / 1000; | |
23b2d477 NC |
814 | } |
815 | ||
9d4d3834 | 816 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
817 | { |
818 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
819 | if (val <= -64000) | |
820 | return 0; | |
821 | if (val >= 191750) | |
822 | return 0xFFC0; | |
823 | return (val + 64000 + 125) / 250 * 64; | |
23b2d477 | 824 | } |
589f707c GR |
825 | if (val <= 0) |
826 | return 0; | |
827 | if (val >= 127750) | |
828 | return 0x7FC0; | |
829 | return (val + 125) / 250 * 64; | |
cea50fe2 NC |
830 | } |
831 | ||
eb1c8f43 GR |
832 | /* pec used for ADM1032 only */ |
833 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
834 | char *buf) | |
30d7394b | 835 | { |
eb1c8f43 | 836 | struct i2c_client *client = to_i2c_client(dev); |
97ae60bb | 837 | |
eb1c8f43 | 838 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
30d7394b JD |
839 | } |
840 | ||
eb1c8f43 GR |
841 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, |
842 | const char *buf, size_t count) | |
30d7394b | 843 | { |
eb1c8f43 | 844 | struct i2c_client *client = to_i2c_client(dev); |
11e57812 GR |
845 | long val; |
846 | int err; | |
847 | ||
179c4fdb | 848 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
849 | if (err < 0) |
850 | return err; | |
30d7394b | 851 | |
eb1c8f43 GR |
852 | switch (val) { |
853 | case 0: | |
854 | client->flags &= ~I2C_CLIENT_PEC; | |
855 | break; | |
856 | case 1: | |
857 | client->flags |= I2C_CLIENT_PEC; | |
858 | break; | |
859 | default: | |
860 | return -EINVAL; | |
861 | } | |
06e1c0a2 | 862 | |
30d7394b | 863 | return count; |
1da177e4 | 864 | } |
30d7394b | 865 | |
eb1c8f43 GR |
866 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); |
867 | ||
868 | static int lm90_get_temp11(struct lm90_data *data, int index) | |
30d7394b | 869 | { |
eb1c8f43 | 870 | s16 temp11 = data->temp11[index]; |
23b2d477 NC |
871 | int temp; |
872 | ||
1daaceb2 | 873 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 874 | temp = temp_from_u16_adt7461(data, temp11); |
271dabf5 | 875 | else if (data->kind == max6646) |
eb1c8f43 | 876 | temp = temp_from_u16(temp11); |
23b2d477 | 877 | else |
eb1c8f43 | 878 | temp = temp_from_s16(temp11); |
23b2d477 | 879 | |
97ae60bb | 880 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 881 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
882 | temp += 16000; |
883 | ||
eb1c8f43 | 884 | return temp; |
1da177e4 | 885 | } |
30d7394b | 886 | |
eb1c8f43 | 887 | static int lm90_set_temp11(struct lm90_data *data, int index, long val) |
30d7394b | 888 | { |
eb1c8f43 | 889 | static struct reg { |
96512861 GR |
890 | u8 high; |
891 | u8 low; | |
eb1c8f43 GR |
892 | } reg[] = { |
893 | [REMOTE_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
894 | [REMOTE_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL }, | |
895 | [REMOTE_OFFSET] = { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL }, | |
896 | [REMOTE2_LOW] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL }, | |
897 | [REMOTE2_HIGH] = { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL } | |
30d7394b | 898 | }; |
1de8b250 | 899 | struct i2c_client *client = data->client; |
eb1c8f43 | 900 | struct reg *regp = ®[index]; |
11e57812 GR |
901 | int err; |
902 | ||
97ae60bb | 903 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 904 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
905 | val -= 16000; |
906 | ||
1daaceb2 | 907 | if (data->kind == adt7461 || data->kind == tmp451) |
96512861 | 908 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 909 | else if (data->kind == max6646) |
96512861 | 910 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 911 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 912 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 913 | else |
96512861 | 914 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 915 | |
eb1c8f43 GR |
916 | lm90_select_remote_channel(client, data, index >= 3); |
917 | err = i2c_smbus_write_byte_data(client, regp->high, | |
96512861 | 918 | data->temp11[index] >> 8); |
eb1c8f43 GR |
919 | if (err < 0) |
920 | return err; | |
88073bb1 | 921 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
eb1c8f43 GR |
922 | err = i2c_smbus_write_byte_data(client, regp->low, |
923 | data->temp11[index] & 0xff); | |
06e1c0a2 | 924 | |
eb1c8f43 GR |
925 | lm90_select_remote_channel(client, data, 0); |
926 | return err; | |
1da177e4 | 927 | } |
30d7394b | 928 | |
eb1c8f43 | 929 | static int lm90_get_temp8(struct lm90_data *data, int index) |
30d7394b | 930 | { |
eb1c8f43 | 931 | s8 temp8 = data->temp8[index]; |
23b2d477 NC |
932 | int temp; |
933 | ||
1daaceb2 | 934 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 935 | temp = temp_from_u8_adt7461(data, temp8); |
ec38fa2b | 936 | else if (data->kind == max6646) |
eb1c8f43 | 937 | temp = temp_from_u8(temp8); |
23b2d477 | 938 | else |
eb1c8f43 | 939 | temp = temp_from_s8(temp8); |
23b2d477 | 940 | |
97ae60bb | 941 | /* +16 degrees offset for temp2 for the LM99 */ |
eb1c8f43 | 942 | if (data->kind == lm99 && index == 3) |
97ae60bb JD |
943 | temp += 16000; |
944 | ||
eb1c8f43 | 945 | return temp; |
1da177e4 | 946 | } |
1da177e4 | 947 | |
eb1c8f43 | 948 | static int lm90_set_temp8(struct lm90_data *data, int index, long val) |
1da177e4 | 949 | { |
eb1c8f43 GR |
950 | static const u8 reg[TEMP8_REG_NUM] = { |
951 | LM90_REG_W_LOCAL_LOW, | |
952 | LM90_REG_W_LOCAL_HIGH, | |
953 | LM90_REG_W_LOCAL_CRIT, | |
954 | LM90_REG_W_REMOTE_CRIT, | |
955 | MAX6659_REG_W_LOCAL_EMERG, | |
956 | MAX6659_REG_W_REMOTE_EMERG, | |
957 | LM90_REG_W_REMOTE_CRIT, | |
958 | MAX6659_REG_W_REMOTE_EMERG, | |
959 | }; | |
1de8b250 | 960 | struct i2c_client *client = data->client; |
11e57812 | 961 | int err; |
1da177e4 | 962 | |
eb1c8f43 GR |
963 | /* +16 degrees offset for temp2 for the LM99 */ |
964 | if (data->kind == lm99 && index == 3) | |
965 | val -= 16000; | |
11e57812 | 966 | |
1daaceb2 | 967 | if (data->kind == adt7461 || data->kind == tmp451) |
eb1c8f43 | 968 | data->temp8[index] = temp_to_u8_adt7461(data, val); |
ec38fa2b | 969 | else if (data->kind == max6646) |
eb1c8f43 | 970 | data->temp8[index] = temp_to_u8(val); |
ec38fa2b | 971 | else |
eb1c8f43 | 972 | data->temp8[index] = temp_to_s8(val); |
ec38fa2b | 973 | |
eb1c8f43 GR |
974 | lm90_select_remote_channel(client, data, index >= 6); |
975 | err = i2c_smbus_write_byte_data(client, reg[index], data->temp8[index]); | |
976 | lm90_select_remote_channel(client, data, 0); | |
37ad04d7 | 977 | |
eb1c8f43 | 978 | return err; |
1da177e4 LT |
979 | } |
980 | ||
eb1c8f43 | 981 | static int lm90_get_temphyst(struct lm90_data *data, int index) |
2d45771e | 982 | { |
eb1c8f43 | 983 | int temp; |
37ad04d7 | 984 | |
eb1c8f43 GR |
985 | if (data->kind == adt7461 || data->kind == tmp451) |
986 | temp = temp_from_u8_adt7461(data, data->temp8[index]); | |
987 | else if (data->kind == max6646) | |
988 | temp = temp_from_u8(data->temp8[index]); | |
989 | else | |
990 | temp = temp_from_s8(data->temp8[index]); | |
2d45771e | 991 | |
eb1c8f43 GR |
992 | /* +16 degrees offset for temp2 for the LM99 */ |
993 | if (data->kind == lm99 && index == 3) | |
994 | temp += 16000; | |
0c01b644 | 995 | |
eb1c8f43 | 996 | return temp - temp_from_s8(data->temp_hyst); |
0c01b644 GR |
997 | } |
998 | ||
eb1c8f43 | 999 | static int lm90_set_temphyst(struct lm90_data *data, long val) |
0c01b644 | 1000 | { |
1de8b250 | 1001 | struct i2c_client *client = data->client; |
eb1c8f43 | 1002 | int temp; |
0c01b644 GR |
1003 | int err; |
1004 | ||
eb1c8f43 GR |
1005 | if (data->kind == adt7461 || data->kind == tmp451) |
1006 | temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]); | |
1007 | else if (data->kind == max6646) | |
1008 | temp = temp_from_u8(data->temp8[LOCAL_CRIT]); | |
1009 | else | |
1010 | temp = temp_from_s8(data->temp8[LOCAL_CRIT]); | |
0c01b644 | 1011 | |
eb1c8f43 GR |
1012 | data->temp_hyst = hyst_to_reg(temp - val); |
1013 | err = i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, | |
1014 | data->temp_hyst); | |
1015 | return err; | |
0c01b644 GR |
1016 | } |
1017 | ||
eb1c8f43 GR |
1018 | static const u8 lm90_temp_index[3] = { |
1019 | LOCAL_TEMP, REMOTE_TEMP, REMOTE2_TEMP | |
0e39e01c JD |
1020 | }; |
1021 | ||
eb1c8f43 GR |
1022 | static const u8 lm90_temp_min_index[3] = { |
1023 | LOCAL_LOW, REMOTE_LOW, REMOTE2_LOW | |
0e39e01c JD |
1024 | }; |
1025 | ||
eb1c8f43 GR |
1026 | static const u8 lm90_temp_max_index[3] = { |
1027 | LOCAL_HIGH, REMOTE_HIGH, REMOTE2_HIGH | |
742192f5 GR |
1028 | }; |
1029 | ||
eb1c8f43 GR |
1030 | static const u8 lm90_temp_crit_index[3] = { |
1031 | LOCAL_CRIT, REMOTE_CRIT, REMOTE2_CRIT | |
742192f5 GR |
1032 | }; |
1033 | ||
eb1c8f43 GR |
1034 | static const u8 lm90_temp_emerg_index[3] = { |
1035 | LOCAL_EMERG, REMOTE_EMERG, REMOTE2_EMERG | |
6948708d GR |
1036 | }; |
1037 | ||
eb1c8f43 GR |
1038 | static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 }; |
1039 | static const u8 lm90_max_alarm_bits[3] = { 0, 4, 12 }; | |
1040 | static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 }; | |
1041 | static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 }; | |
1042 | static const u8 lm90_fault_bits[3] = { 0, 2, 10 }; | |
6948708d | 1043 | |
eb1c8f43 GR |
1044 | static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val) |
1045 | { | |
1046 | struct lm90_data *data = dev_get_drvdata(dev); | |
1047 | int err; | |
06e1c0a2 | 1048 | |
eb1c8f43 GR |
1049 | mutex_lock(&data->update_lock); |
1050 | err = lm90_update_device(dev); | |
1051 | mutex_unlock(&data->update_lock); | |
1052 | if (err) | |
1053 | return err; | |
06e1c0a2 | 1054 | |
eb1c8f43 GR |
1055 | switch (attr) { |
1056 | case hwmon_temp_input: | |
1057 | *val = lm90_get_temp11(data, lm90_temp_index[channel]); | |
1058 | break; | |
1059 | case hwmon_temp_min_alarm: | |
1060 | *val = (data->alarms >> lm90_min_alarm_bits[channel]) & 1; | |
1061 | break; | |
1062 | case hwmon_temp_max_alarm: | |
1063 | *val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1; | |
1064 | break; | |
1065 | case hwmon_temp_crit_alarm: | |
1066 | *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1; | |
1067 | break; | |
1068 | case hwmon_temp_emergency_alarm: | |
1069 | *val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1; | |
1070 | break; | |
1071 | case hwmon_temp_fault: | |
1072 | *val = (data->alarms >> lm90_fault_bits[channel]) & 1; | |
1073 | break; | |
1074 | case hwmon_temp_min: | |
1075 | if (channel == 0) | |
1076 | *val = lm90_get_temp8(data, | |
1077 | lm90_temp_min_index[channel]); | |
1078 | else | |
1079 | *val = lm90_get_temp11(data, | |
1080 | lm90_temp_min_index[channel]); | |
1081 | break; | |
1082 | case hwmon_temp_max: | |
1083 | if (channel == 0) | |
1084 | *val = lm90_get_temp8(data, | |
1085 | lm90_temp_max_index[channel]); | |
1086 | else | |
1087 | *val = lm90_get_temp11(data, | |
1088 | lm90_temp_max_index[channel]); | |
1089 | break; | |
1090 | case hwmon_temp_crit: | |
1091 | *val = lm90_get_temp8(data, lm90_temp_crit_index[channel]); | |
1092 | break; | |
1093 | case hwmon_temp_crit_hyst: | |
1094 | *val = lm90_get_temphyst(data, lm90_temp_crit_index[channel]); | |
1095 | break; | |
1096 | case hwmon_temp_emergency: | |
1097 | *val = lm90_get_temp8(data, lm90_temp_emerg_index[channel]); | |
1098 | break; | |
1099 | case hwmon_temp_emergency_hyst: | |
1100 | *val = lm90_get_temphyst(data, lm90_temp_emerg_index[channel]); | |
1101 | break; | |
1102 | case hwmon_temp_offset: | |
1103 | *val = lm90_get_temp11(data, REMOTE_OFFSET); | |
1104 | break; | |
1105 | default: | |
1106 | return -EOPNOTSUPP; | |
1107 | } | |
1108 | return 0; | |
1109 | } | |
06e1c0a2 | 1110 | |
eb1c8f43 GR |
1111 | static int lm90_temp_write(struct device *dev, u32 attr, int channel, long val) |
1112 | { | |
1113 | struct lm90_data *data = dev_get_drvdata(dev); | |
1114 | int err; | |
06e1c0a2 | 1115 | |
eb1c8f43 | 1116 | mutex_lock(&data->update_lock); |
06e1c0a2 | 1117 | |
eb1c8f43 GR |
1118 | err = lm90_update_device(dev); |
1119 | if (err) | |
1120 | goto error; | |
1121 | ||
1122 | switch (attr) { | |
1123 | case hwmon_temp_min: | |
1124 | if (channel == 0) | |
1125 | err = lm90_set_temp8(data, | |
1126 | lm90_temp_min_index[channel], | |
1127 | val); | |
1128 | else | |
1129 | err = lm90_set_temp11(data, | |
1130 | lm90_temp_min_index[channel], | |
1131 | val); | |
1132 | break; | |
1133 | case hwmon_temp_max: | |
1134 | if (channel == 0) | |
1135 | err = lm90_set_temp8(data, | |
1136 | lm90_temp_max_index[channel], | |
1137 | val); | |
1138 | else | |
1139 | err = lm90_set_temp11(data, | |
1140 | lm90_temp_max_index[channel], | |
1141 | val); | |
1142 | break; | |
1143 | case hwmon_temp_crit: | |
1144 | err = lm90_set_temp8(data, lm90_temp_crit_index[channel], val); | |
1145 | break; | |
1146 | case hwmon_temp_crit_hyst: | |
1147 | err = lm90_set_temphyst(data, val); | |
1148 | break; | |
1149 | case hwmon_temp_emergency: | |
1150 | err = lm90_set_temp8(data, lm90_temp_emerg_index[channel], val); | |
1151 | break; | |
1152 | case hwmon_temp_offset: | |
1153 | err = lm90_set_temp11(data, REMOTE_OFFSET, val); | |
1154 | break; | |
1155 | default: | |
1156 | err = -EOPNOTSUPP; | |
1157 | break; | |
1158 | } | |
1159 | error: | |
1160 | mutex_unlock(&data->update_lock); | |
1161 | ||
1162 | return err; | |
1163 | } | |
1164 | ||
1165 | static umode_t lm90_temp_is_visible(const void *data, u32 attr, int channel) | |
c3df5806 | 1166 | { |
eb1c8f43 GR |
1167 | switch (attr) { |
1168 | case hwmon_temp_input: | |
1169 | case hwmon_temp_min_alarm: | |
1170 | case hwmon_temp_max_alarm: | |
1171 | case hwmon_temp_crit_alarm: | |
1172 | case hwmon_temp_emergency_alarm: | |
1173 | case hwmon_temp_emergency_hyst: | |
1174 | case hwmon_temp_fault: | |
1175 | return S_IRUGO; | |
1176 | case hwmon_temp_min: | |
1177 | case hwmon_temp_max: | |
1178 | case hwmon_temp_crit: | |
1179 | case hwmon_temp_emergency: | |
1180 | case hwmon_temp_offset: | |
1181 | return S_IRUGO | S_IWUSR; | |
1182 | case hwmon_temp_crit_hyst: | |
1183 | if (channel == 0) | |
1184 | return S_IRUGO | S_IWUSR; | |
1185 | return S_IRUGO; | |
1186 | default: | |
1187 | return 0; | |
1188 | } | |
c3df5806 JD |
1189 | } |
1190 | ||
eb1c8f43 | 1191 | static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val) |
c3df5806 | 1192 | { |
eb1c8f43 | 1193 | struct lm90_data *data = dev_get_drvdata(dev); |
11e57812 GR |
1194 | int err; |
1195 | ||
eb1c8f43 GR |
1196 | mutex_lock(&data->update_lock); |
1197 | err = lm90_update_device(dev); | |
1198 | mutex_unlock(&data->update_lock); | |
1199 | if (err) | |
11e57812 | 1200 | return err; |
c3df5806 | 1201 | |
eb1c8f43 GR |
1202 | switch (attr) { |
1203 | case hwmon_chip_update_interval: | |
1204 | *val = data->update_interval; | |
c3df5806 | 1205 | break; |
eb1c8f43 GR |
1206 | case hwmon_chip_alarms: |
1207 | *val = data->alarms; | |
c3df5806 JD |
1208 | break; |
1209 | default: | |
eb1c8f43 | 1210 | return -EOPNOTSUPP; |
c3df5806 JD |
1211 | } |
1212 | ||
eb1c8f43 | 1213 | return 0; |
c3df5806 JD |
1214 | } |
1215 | ||
eb1c8f43 GR |
1216 | static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val) |
1217 | { | |
1218 | struct lm90_data *data = dev_get_drvdata(dev); | |
1219 | struct i2c_client *client = data->client; | |
1220 | int err; | |
c3df5806 | 1221 | |
eb1c8f43 GR |
1222 | mutex_lock(&data->update_lock); |
1223 | ||
1224 | err = lm90_update_device(dev); | |
1225 | if (err) | |
1226 | goto error; | |
1227 | ||
1228 | switch (attr) { | |
1229 | case hwmon_chip_update_interval: | |
1230 | err = lm90_set_convrate(client, data, | |
1231 | clamp_val(val, 0, 100000)); | |
1232 | break; | |
1233 | default: | |
1234 | err = -EOPNOTSUPP; | |
1235 | break; | |
1236 | } | |
1237 | error: | |
1238 | mutex_unlock(&data->update_lock); | |
1239 | ||
1240 | return err; | |
1241 | } | |
1242 | ||
1243 | static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel) | |
1244 | { | |
1245 | switch (attr) { | |
1246 | case hwmon_chip_update_interval: | |
1247 | return S_IRUGO | S_IWUSR; | |
1248 | case hwmon_chip_alarms: | |
1249 | return S_IRUGO; | |
1250 | default: | |
1251 | return 0; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | static int lm90_read(struct device *dev, enum hwmon_sensor_types type, | |
1256 | u32 attr, int channel, long *val) | |
1257 | { | |
1258 | switch (type) { | |
1259 | case hwmon_chip: | |
1260 | return lm90_chip_read(dev, attr, channel, val); | |
1261 | case hwmon_temp: | |
1262 | return lm90_temp_read(dev, attr, channel, val); | |
1263 | default: | |
1264 | return -EOPNOTSUPP; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | static int lm90_write(struct device *dev, enum hwmon_sensor_types type, | |
1269 | u32 attr, int channel, long val) | |
1270 | { | |
1271 | switch (type) { | |
1272 | case hwmon_chip: | |
1273 | return lm90_chip_write(dev, attr, channel, val); | |
1274 | case hwmon_temp: | |
1275 | return lm90_temp_write(dev, attr, channel, val); | |
1276 | default: | |
1277 | return -EOPNOTSUPP; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | static umode_t lm90_is_visible(const void *data, enum hwmon_sensor_types type, | |
1282 | u32 attr, int channel) | |
1283 | { | |
1284 | switch (type) { | |
1285 | case hwmon_chip: | |
1286 | return lm90_chip_is_visible(data, attr, channel); | |
1287 | case hwmon_temp: | |
1288 | return lm90_temp_is_visible(data, attr, channel); | |
1289 | default: | |
1290 | return 0; | |
1291 | } | |
1292 | } | |
1da177e4 | 1293 | |
15b66ab6 | 1294 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1295 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1296 | struct i2c_board_info *info) |
8256fe0f | 1297 | { |
b2589ab0 JD |
1298 | struct i2c_adapter *adapter = client->adapter; |
1299 | int address = client->addr; | |
15b66ab6 | 1300 | const char *name = NULL; |
b2589ab0 | 1301 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1302 | |
15b66ab6 GR |
1303 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1304 | return -ENODEV; | |
1da177e4 | 1305 | |
8f2fa77c | 1306 | /* detection and identification */ |
b2589ab0 JD |
1307 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1308 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1309 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1310 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1311 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1312 | return -ENODEV; |
1313 | ||
f90be42f | 1314 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1315 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1316 | if (config2 < 0) | |
9b0e8526 | 1317 | return -ENODEV; |
f90be42f | 1318 | } else |
b2589ab0 | 1319 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1320 | |
f90be42f JD |
1321 | if ((address == 0x4C || address == 0x4D) |
1322 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1323 | if ((config1 & 0x2A) == 0x00 |
1324 | && (config2 & 0xF8) == 0x00 | |
1325 | && convrate <= 0x09) { | |
8f2fa77c JD |
1326 | if (address == 0x4C |
1327 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1328 | name = "lm90"; | |
32c82a93 | 1329 | } else |
8f2fa77c JD |
1330 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1331 | name = "lm99"; | |
1332 | dev_info(&adapter->dev, | |
1333 | "Assuming LM99 chip at 0x%02x\n", | |
1334 | address); | |
1335 | dev_info(&adapter->dev, | |
1336 | "If it is an LM89, instantiate it " | |
1337 | "with the new_device sysfs " | |
1338 | "interface\n"); | |
271dabf5 | 1339 | } else |
8f2fa77c JD |
1340 | if (address == 0x4C |
1341 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1342 | name = "lm86"; | |
1da177e4 LT |
1343 | } |
1344 | } | |
8f2fa77c JD |
1345 | } else |
1346 | if ((address == 0x4C || address == 0x4D) | |
1347 | && man_id == 0x41) { /* Analog Devices */ | |
1348 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1349 | && (config1 & 0x3F) == 0x00 |
1350 | && convrate <= 0x0A) { | |
8f2fa77c | 1351 | name = "adm1032"; |
f36ffeab GR |
1352 | /* |
1353 | * The ADM1032 supports PEC, but only if combined | |
1354 | * transactions are not used. | |
1355 | */ | |
8f2fa77c JD |
1356 | if (i2c_check_functionality(adapter, |
1357 | I2C_FUNC_SMBUS_BYTE)) | |
1358 | info->flags |= I2C_CLIENT_PEC; | |
1359 | } else | |
1360 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1361 | && (config1 & 0x1B) == 0x00 |
1362 | && convrate <= 0x0A) { | |
8f2fa77c | 1363 | name = "adt7461"; |
5a4e5e6a GR |
1364 | } else |
1365 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1366 | && (config1 & 0x1B) == 0x00 |
1367 | && convrate <= 0x0A) { | |
5a4e5e6a | 1368 | name = "adt7461a"; |
8f2fa77c JD |
1369 | } |
1370 | } else | |
1371 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1372 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1373 | |
1374 | /* | |
1375 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1376 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1377 | * exists, both readings will reflect the same value. Otherwise, | |
1378 | * the readings will be different. | |
1379 | */ | |
b2589ab0 JD |
1380 | emerg = i2c_smbus_read_byte_data(client, |
1381 | MAX6659_REG_R_REMOTE_EMERG); | |
1382 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1383 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1384 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1385 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1386 | status2 = i2c_smbus_read_byte_data(client, |
1387 | MAX6696_REG_R_STATUS2); | |
1388 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1389 | return -ENODEV; |
1390 | ||
8f2fa77c JD |
1391 | /* |
1392 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1393 | * register. Reading from that address will return the last | |
1394 | * read value, which in our case is those of the man_id | |
1395 | * register. Likewise, the config1 register seems to lack a | |
1396 | * low nibble, so the value will be those of the previous | |
1397 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1398 | * MAX6659 has a third set of upper temperature limit registers. |
1399 | * Those registers also return values on MAX6657 and MAX6658, | |
1400 | * thus the only way to detect MAX6659 is by its address. | |
1401 | * For this reason it will be mis-detected as MAX6657 if its | |
1402 | * address is 0x4C. | |
8f2fa77c JD |
1403 | */ |
1404 | if (chip_id == man_id | |
13c84951 | 1405 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1406 | && (config1 & 0x1F) == (man_id & 0x0F) |
1407 | && convrate <= 0x09) { | |
13c84951 GR |
1408 | if (address == 0x4C) |
1409 | name = "max6657"; | |
1410 | else | |
1411 | name = "max6659"; | |
8f2fa77c | 1412 | } else |
06e1c0a2 GR |
1413 | /* |
1414 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1415 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1416 | * register is unused and should return zero when read. Bit 0 of | |
1417 | * the status2 register is unused and should return zero when | |
1418 | * read. | |
1419 | * | |
1420 | * MAX6695 and MAX6696 have an additional set of temperature | |
1421 | * limit registers. We can detect those chips by checking if | |
1422 | * one of those registers exists. | |
1423 | */ | |
1424 | if (chip_id == 0x01 | |
b2589ab0 JD |
1425 | && (config1 & 0x10) == 0x00 |
1426 | && (status2 & 0x01) == 0x00 | |
1427 | && emerg == emerg2 | |
1428 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1429 | name = "max6696"; |
1430 | } else | |
8f2fa77c JD |
1431 | /* |
1432 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1433 | * revision of the chip. The lowest bit of the config1 register | |
1434 | * is unused and should return zero when read, so should the | |
1435 | * second to last bit of config1 (software reset). | |
1436 | */ | |
1437 | if (chip_id == 0x01 | |
b2589ab0 JD |
1438 | && (config1 & 0x03) == 0x00 |
1439 | && convrate <= 0x07) { | |
8f2fa77c JD |
1440 | name = "max6680"; |
1441 | } else | |
1442 | /* | |
1443 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1444 | * revision of the chip. The lowest 6 bits of the config1 | |
1445 | * register are unused and should return zero when read. | |
1446 | */ | |
1447 | if (chip_id == 0x59 | |
b2589ab0 JD |
1448 | && (config1 & 0x3f) == 0x00 |
1449 | && convrate <= 0x07) { | |
8f2fa77c | 1450 | name = "max6646"; |
1da177e4 | 1451 | } |
6771ea1f JD |
1452 | } else |
1453 | if (address == 0x4C | |
1454 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1455 | if ((config1 & 0x2A) == 0x00 |
1456 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1457 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1458 | && convrate <= 0x09) { |
c4f99a2b JD |
1459 | name = "w83l771"; |
1460 | } else | |
1461 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1462 | && convrate <= 0x08) { |
c4f99a2b JD |
1463 | name = "w83l771"; |
1464 | } | |
6771ea1f | 1465 | } |
2ef01793 | 1466 | } else |
6d101c58 JD |
1467 | if (address >= 0x48 && address <= 0x4F |
1468 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1469 | if (chip_id == 0x00 |
b2589ab0 JD |
1470 | && (config1 & 0x2A) == 0x00 |
1471 | && (config2 & 0xFE) == 0x00 | |
1472 | && convrate <= 0x09) { | |
2ef01793 SD |
1473 | name = "sa56004"; |
1474 | } | |
ae544f64 GR |
1475 | } else |
1476 | if ((address == 0x4C || address == 0x4D) | |
1477 | && man_id == 0x47) { /* GMT */ | |
1478 | if (chip_id == 0x01 /* G781 */ | |
1479 | && (config1 & 0x3F) == 0x00 | |
1480 | && convrate <= 0x08) | |
1481 | name = "g781"; | |
1daaceb2 WN |
1482 | } else |
1483 | if (address == 0x4C | |
1484 | && man_id == 0x55) { /* Texas Instruments */ | |
1485 | int local_ext; | |
1486 | ||
1487 | local_ext = i2c_smbus_read_byte_data(client, | |
1488 | TMP451_REG_R_LOCAL_TEMPL); | |
1489 | ||
1490 | if (chip_id == 0x00 /* TMP451 */ | |
1491 | && (config1 & 0x1B) == 0x00 | |
1492 | && convrate <= 0x09 | |
1493 | && (local_ext & 0x0F) == 0x00) | |
1494 | name = "tmp451"; | |
1da177e4 LT |
1495 | } |
1496 | ||
8f2fa77c JD |
1497 | if (!name) { /* identification failed */ |
1498 | dev_dbg(&adapter->dev, | |
1499 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1500 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1501 | return -ENODEV; | |
1da177e4 | 1502 | } |
8f2fa77c | 1503 | |
9b0e8526 JD |
1504 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1505 | ||
1506 | return 0; | |
1507 | } | |
1508 | ||
1f17a444 | 1509 | static void lm90_restore_conf(void *_data) |
f7001bb0 | 1510 | { |
1f17a444 GR |
1511 | struct lm90_data *data = _data; |
1512 | struct i2c_client *client = data->client; | |
1513 | ||
f7001bb0 GR |
1514 | /* Restore initial configuration */ |
1515 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1516 | data->convrate_orig); | |
1517 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1518 | data->config_orig); | |
1519 | } | |
1520 | ||
37ad04d7 | 1521 | static int lm90_init_client(struct i2c_client *client, struct lm90_data *data) |
15b66ab6 | 1522 | { |
37ad04d7 | 1523 | int config, convrate; |
15b66ab6 | 1524 | |
37ad04d7 GR |
1525 | convrate = lm90_read_reg(client, LM90_REG_R_CONVRATE); |
1526 | if (convrate < 0) | |
1527 | return convrate; | |
0c01b644 GR |
1528 | data->convrate_orig = convrate; |
1529 | ||
15b66ab6 GR |
1530 | /* |
1531 | * Start the conversions. | |
1532 | */ | |
0c01b644 | 1533 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
37ad04d7 GR |
1534 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1535 | if (config < 0) | |
1536 | return config; | |
15b66ab6 GR |
1537 | data->config_orig = config; |
1538 | ||
1539 | /* Check Temperature Range Select */ | |
1daaceb2 | 1540 | if (data->kind == adt7461 || data->kind == tmp451) { |
15b66ab6 GR |
1541 | if (config & 0x04) |
1542 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1543 | } | |
1544 | ||
1545 | /* | |
1546 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1547 | * 0.125 degree resolution) and range (0x08, extend range | |
1548 | * to -64 degree) mode for the remote temperature sensor. | |
1549 | */ | |
1550 | if (data->kind == max6680) | |
1551 | config |= 0x18; | |
1552 | ||
1553 | /* | |
1554 | * Select external channel 0 for max6695/96 | |
1555 | */ | |
1556 | if (data->kind == max6696) | |
1557 | config &= ~0x08; | |
1558 | ||
1559 | config &= 0xBF; /* run */ | |
1560 | if (config != data->config_orig) /* Only write if changed */ | |
1561 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1f17a444 | 1562 | |
c5fcf01b | 1563 | return devm_add_action_or_reset(&client->dev, lm90_restore_conf, data); |
15b66ab6 GR |
1564 | } |
1565 | ||
072de496 WN |
1566 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1567 | { | |
1568 | struct lm90_data *data = i2c_get_clientdata(client); | |
37ad04d7 | 1569 | int st, st2 = 0; |
072de496 | 1570 | |
37ad04d7 GR |
1571 | st = lm90_read_reg(client, LM90_REG_R_STATUS); |
1572 | if (st < 0) | |
1573 | return false; | |
072de496 | 1574 | |
37ad04d7 GR |
1575 | if (data->kind == max6696) { |
1576 | st2 = lm90_read_reg(client, MAX6696_REG_R_STATUS2); | |
1577 | if (st2 < 0) | |
1578 | return false; | |
1579 | } | |
072de496 WN |
1580 | |
1581 | *status = st | (st2 << 8); | |
1582 | ||
1583 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1584 | return false; | |
1585 | ||
1586 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1587 | (st2 & MAX6696_STATUS2_LOT2)) | |
1588 | dev_warn(&client->dev, | |
1589 | "temp%d out of range, please check!\n", 1); | |
1590 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1591 | (st2 & MAX6696_STATUS2_ROT2)) | |
1592 | dev_warn(&client->dev, | |
1593 | "temp%d out of range, please check!\n", 2); | |
1594 | if (st & LM90_STATUS_ROPEN) | |
1595 | dev_warn(&client->dev, | |
1596 | "temp%d diode open, please check!\n", 2); | |
1597 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1598 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1599 | dev_warn(&client->dev, | |
1600 | "temp%d out of range, please check!\n", 3); | |
1601 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1602 | dev_warn(&client->dev, | |
1603 | "temp%d diode open, please check!\n", 3); | |
1604 | ||
1605 | return true; | |
1606 | } | |
1607 | ||
109b1283 WN |
1608 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1609 | { | |
1610 | struct i2c_client *client = dev_id; | |
1611 | u16 status; | |
1612 | ||
1613 | if (lm90_is_tripped(client, &status)) | |
1614 | return IRQ_HANDLED; | |
1615 | else | |
1616 | return IRQ_NONE; | |
1617 | } | |
1618 | ||
1f17a444 GR |
1619 | static void lm90_remove_pec(void *dev) |
1620 | { | |
1621 | device_remove_file(dev, &dev_attr_pec); | |
1622 | } | |
1623 | ||
1624 | static void lm90_regulator_disable(void *regulator) | |
1625 | { | |
1626 | regulator_disable(regulator); | |
1627 | } | |
1628 | ||
eb1c8f43 GR |
1629 | static const u32 lm90_chip_config[] = { |
1630 | HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL | HWMON_C_ALARMS, | |
1631 | 0 | |
1632 | }; | |
1633 | ||
1634 | static const struct hwmon_channel_info lm90_chip_info = { | |
1635 | .type = hwmon_chip, | |
1636 | .config = lm90_chip_config, | |
1637 | }; | |
1638 | ||
1639 | ||
1640 | static const struct hwmon_ops lm90_ops = { | |
1641 | .is_visible = lm90_is_visible, | |
1642 | .read = lm90_read, | |
1643 | .write = lm90_write, | |
1644 | }; | |
1645 | ||
b2589ab0 | 1646 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1647 | const struct i2c_device_id *id) |
1648 | { | |
b2589ab0 JD |
1649 | struct device *dev = &client->dev; |
1650 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
eb1c8f43 | 1651 | struct hwmon_channel_info *info; |
3e0f964f | 1652 | struct regulator *regulator; |
6e5f62b9 | 1653 | struct device *hwmon_dev; |
eb1c8f43 | 1654 | struct lm90_data *data; |
9b0e8526 | 1655 | int err; |
1da177e4 | 1656 | |
3e0f964f WN |
1657 | regulator = devm_regulator_get(dev, "vcc"); |
1658 | if (IS_ERR(regulator)) | |
1659 | return PTR_ERR(regulator); | |
1660 | ||
1661 | err = regulator_enable(regulator); | |
1662 | if (err < 0) { | |
d89fa686 | 1663 | dev_err(dev, "Failed to enable regulator: %d\n", err); |
3e0f964f WN |
1664 | return err; |
1665 | } | |
1666 | ||
c5fcf01b GR |
1667 | err = devm_add_action_or_reset(dev, lm90_regulator_disable, regulator); |
1668 | if (err) | |
1669 | return err; | |
1f17a444 | 1670 | |
d89fa686 | 1671 | data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL); |
20f426ff GR |
1672 | if (!data) |
1673 | return -ENOMEM; | |
1674 | ||
1de8b250 | 1675 | data->client = client; |
b2589ab0 | 1676 | i2c_set_clientdata(client, data); |
9a61bf63 | 1677 | mutex_init(&data->update_lock); |
1da177e4 | 1678 | |
9b0e8526 JD |
1679 | /* Set the device type */ |
1680 | data->kind = id->driver_data; | |
1681 | if (data->kind == adm1032) { | |
1682 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1683 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1684 | } |
1da177e4 | 1685 | |
f36ffeab GR |
1686 | /* |
1687 | * Different devices have different alarm bits triggering the | |
1688 | * ALERT# output | |
1689 | */ | |
4667bcb8 | 1690 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1691 | |
88073bb1 | 1692 | /* Set chip capabilities */ |
4667bcb8 | 1693 | data->flags = lm90_params[data->kind].flags; |
eb1c8f43 GR |
1694 | |
1695 | data->chip.ops = &lm90_ops; | |
1696 | data->chip.info = data->info; | |
1697 | ||
1698 | data->info[0] = &lm90_chip_info; | |
1699 | data->info[1] = &data->temp_info; | |
1700 | ||
1701 | info = &data->temp_info; | |
1702 | info->type = hwmon_temp; | |
1703 | info->config = data->channel_config; | |
1704 | ||
1705 | data->channel_config[0] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1706 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1707 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM; | |
1708 | data->channel_config[1] = HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | | |
1709 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | | |
1710 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT; | |
1711 | ||
1712 | if (data->flags & LM90_HAVE_OFFSET) | |
1713 | data->channel_config[1] |= HWMON_T_OFFSET; | |
1714 | ||
1715 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
1716 | data->channel_config[0] |= HWMON_T_EMERGENCY | | |
1717 | HWMON_T_EMERGENCY_HYST; | |
1718 | data->channel_config[1] |= HWMON_T_EMERGENCY | | |
1719 | HWMON_T_EMERGENCY_HYST; | |
1720 | } | |
1721 | ||
1722 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { | |
1723 | data->channel_config[0] |= HWMON_T_EMERGENCY_ALARM; | |
1724 | data->channel_config[1] |= HWMON_T_EMERGENCY_ALARM; | |
1725 | } | |
1726 | ||
1727 | if (data->flags & LM90_HAVE_TEMP3) { | |
1728 | data->channel_config[2] = HWMON_T_INPUT | | |
1729 | HWMON_T_MIN | HWMON_T_MAX | | |
1730 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | | |
1731 | HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST | | |
1732 | HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | | |
1733 | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM | | |
1734 | HWMON_T_FAULT; | |
1735 | } | |
1736 | ||
a095f687 | 1737 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1738 | |
0c01b644 GR |
1739 | /* Set maximum conversion rate */ |
1740 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1741 | ||
1da177e4 | 1742 | /* Initialize the LM90 chip */ |
37ad04d7 GR |
1743 | err = lm90_init_client(client, data); |
1744 | if (err < 0) { | |
1745 | dev_err(dev, "Failed to initialize device\n"); | |
1746 | return err; | |
1747 | } | |
1da177e4 | 1748 | |
eb1c8f43 GR |
1749 | /* |
1750 | * The 'pec' attribute is attached to the i2c device and thus created | |
1751 | * separately. | |
1752 | */ | |
b2589ab0 JD |
1753 | if (client->flags & I2C_CLIENT_PEC) { |
1754 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1755 | if (err) |
1f17a444 | 1756 | return err; |
c5fcf01b GR |
1757 | err = devm_add_action_or_reset(dev, lm90_remove_pec, dev); |
1758 | if (err) | |
1759 | return err; | |
06e1c0a2 | 1760 | } |
0e39e01c | 1761 | |
eb1c8f43 GR |
1762 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
1763 | data, &data->chip, | |
1764 | NULL); | |
6e5f62b9 GR |
1765 | if (IS_ERR(hwmon_dev)) |
1766 | return PTR_ERR(hwmon_dev); | |
943b0830 | 1767 | |
109b1283 WN |
1768 | if (client->irq) { |
1769 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1770 | err = devm_request_threaded_irq(dev, client->irq, | |
1771 | NULL, lm90_irq_thread, | |
1772 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1773 | "lm90", client); | |
1774 | if (err < 0) { | |
1775 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
6e5f62b9 | 1776 | return err; |
109b1283 WN |
1777 | } |
1778 | } | |
1779 | ||
1da177e4 LT |
1780 | return 0; |
1781 | } | |
1782 | ||
b4f21054 BT |
1783 | static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, |
1784 | unsigned int flag) | |
53de3342 | 1785 | { |
072de496 | 1786 | u16 alarms; |
06e1c0a2 | 1787 | |
b4f21054 BT |
1788 | if (type != I2C_PROTOCOL_SMBUS_ALERT) |
1789 | return; | |
1790 | ||
072de496 | 1791 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1792 | /* |
1793 | * Disable ALERT# output, because these chips don't implement | |
1794 | * SMBus alert correctly; they should only hold the alert line | |
1795 | * low briefly. | |
1796 | */ | |
072de496 WN |
1797 | struct lm90_data *data = i2c_get_clientdata(client); |
1798 | ||
37ad04d7 GR |
1799 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) && |
1800 | (alarms & data->alert_alarms)) { | |
1801 | int config; | |
1802 | ||
53de3342 | 1803 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
37ad04d7 GR |
1804 | config = lm90_read_reg(client, LM90_REG_R_CONFIG1); |
1805 | if (config >= 0) | |
1806 | i2c_smbus_write_byte_data(client, | |
1807 | LM90_REG_W_CONFIG1, | |
1808 | config | 0x80); | |
53de3342 | 1809 | } |
072de496 WN |
1810 | } else { |
1811 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1812 | } |
1813 | } | |
1814 | ||
15b66ab6 GR |
1815 | static struct i2c_driver lm90_driver = { |
1816 | .class = I2C_CLASS_HWMON, | |
1817 | .driver = { | |
1818 | .name = "lm90", | |
1819 | }, | |
1820 | .probe = lm90_probe, | |
15b66ab6 GR |
1821 | .alert = lm90_alert, |
1822 | .id_table = lm90_id, | |
1823 | .detect = lm90_detect, | |
1824 | .address_list = normal_i2c, | |
1825 | }; | |
1da177e4 | 1826 | |
f0967eea | 1827 | module_i2c_driver(lm90_driver); |
1da177e4 | 1828 | |
7c81c60f | 1829 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
1830 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); |
1831 | MODULE_LICENSE("GPL"); |