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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 | * | |
1da177e4 LT |
63 | * Since the LM90 was the first chipset supported by this driver, most |
64 | * comments will refer to this chipset, but are actually general and | |
65 | * concern all supported chipsets, unless mentioned otherwise. | |
66 | * | |
67 | * This program is free software; you can redistribute it and/or modify | |
68 | * it under the terms of the GNU General Public License as published by | |
69 | * the Free Software Foundation; either version 2 of the License, or | |
70 | * (at your option) any later version. | |
71 | * | |
72 | * This program is distributed in the hope that it will be useful, | |
73 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
74 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
75 | * GNU General Public License for more details. | |
76 | * | |
77 | * You should have received a copy of the GNU General Public License | |
78 | * along with this program; if not, write to the Free Software | |
79 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
80 | */ | |
81 | ||
1da177e4 LT |
82 | #include <linux/module.h> |
83 | #include <linux/init.h> | |
84 | #include <linux/slab.h> | |
85 | #include <linux/jiffies.h> | |
86 | #include <linux/i2c.h> | |
10c08f81 | 87 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
88 | #include <linux/hwmon.h> |
89 | #include <linux/err.h> | |
9a61bf63 | 90 | #include <linux/mutex.h> |
0e39e01c | 91 | #include <linux/sysfs.h> |
109b1283 | 92 | #include <linux/interrupt.h> |
1da177e4 LT |
93 | |
94 | /* | |
95 | * Addresses to scan | |
96 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 97 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
98 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
99 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
100 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
101 | * have address 0x4d. | |
271dabf5 | 102 | * MAX6647 has address 0x4e. |
13c84951 | 103 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
32c82a93 RB |
104 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
105 | * 0x4c, 0x4d or 0x4e. | |
2ef01793 | 106 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
107 | */ |
108 | ||
25e9c86d | 109 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
110 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
111 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 112 | |
13c84951 | 113 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
ae544f64 | 114 | max6646, w83l771, max6696, sa56004, g781 }; |
1da177e4 LT |
115 | |
116 | /* | |
117 | * The LM90 registers | |
118 | */ | |
119 | ||
120 | #define LM90_REG_R_MAN_ID 0xFE | |
121 | #define LM90_REG_R_CHIP_ID 0xFF | |
122 | #define LM90_REG_R_CONFIG1 0x03 | |
123 | #define LM90_REG_W_CONFIG1 0x09 | |
124 | #define LM90_REG_R_CONFIG2 0xBF | |
125 | #define LM90_REG_W_CONFIG2 0xBF | |
126 | #define LM90_REG_R_CONVRATE 0x04 | |
127 | #define LM90_REG_W_CONVRATE 0x0A | |
128 | #define LM90_REG_R_STATUS 0x02 | |
129 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
130 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
131 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
132 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
133 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
134 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
135 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
136 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
137 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
138 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
139 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
140 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
141 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
142 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
143 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
144 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
145 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
146 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
147 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
148 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
149 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
150 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
151 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
152 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
153 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
154 | ||
06e1c0a2 | 155 | /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
156 | |
157 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 158 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
159 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
160 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
161 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
162 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 163 | |
2ef01793 SD |
164 | /* SA56004 registers */ |
165 | ||
166 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
167 | ||
0c01b644 GR |
168 | #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */ |
169 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ | |
170 | ||
23b2d477 NC |
171 | /* |
172 | * Device flags | |
173 | */ | |
88073bb1 GR |
174 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
175 | /* Device features */ | |
176 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 177 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 178 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
179 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
180 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 181 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
23b2d477 | 182 | |
072de496 WN |
183 | /* LM90 status */ |
184 | #define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */ | |
185 | #define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */ | |
186 | #define LM90_STATUS_ROPEN (1 << 2) /* remote is an open circuit */ | |
187 | #define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */ | |
188 | #define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */ | |
189 | #define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */ | |
190 | #define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */ | |
191 | ||
192 | #define MAX6696_STATUS2_R2THRM (1 << 1) /* remote2 THERM limit tripped */ | |
193 | #define MAX6696_STATUS2_R2OPEN (1 << 2) /* remote2 is an open circuit */ | |
194 | #define MAX6696_STATUS2_R2LOW (1 << 3) /* remote2 low temp limit tripped */ | |
195 | #define MAX6696_STATUS2_R2HIGH (1 << 4) /* remote2 high temp limit tripped */ | |
196 | #define MAX6696_STATUS2_ROT2 (1 << 5) /* remote emergency limit tripped */ | |
197 | #define MAX6696_STATUS2_R2OT2 (1 << 6) /* remote2 emergency limit tripped */ | |
198 | #define MAX6696_STATUS2_LOT2 (1 << 7) /* local emergency limit tripped */ | |
199 | ||
1da177e4 LT |
200 | /* |
201 | * Driver data (common to all clients) | |
202 | */ | |
203 | ||
9b0e8526 JD |
204 | static const struct i2c_device_id lm90_id[] = { |
205 | { "adm1032", adm1032 }, | |
206 | { "adt7461", adt7461 }, | |
5a4e5e6a | 207 | { "adt7461a", adt7461 }, |
ae544f64 | 208 | { "g781", g781 }, |
9b0e8526 JD |
209 | { "lm90", lm90 }, |
210 | { "lm86", lm86 }, | |
97ae60bb JD |
211 | { "lm89", lm86 }, |
212 | { "lm99", lm99 }, | |
271dabf5 BH |
213 | { "max6646", max6646 }, |
214 | { "max6647", max6646 }, | |
215 | { "max6649", max6646 }, | |
9b0e8526 JD |
216 | { "max6657", max6657 }, |
217 | { "max6658", max6657 }, | |
13c84951 | 218 | { "max6659", max6659 }, |
9b0e8526 JD |
219 | { "max6680", max6680 }, |
220 | { "max6681", max6680 }, | |
06e1c0a2 GR |
221 | { "max6695", max6696 }, |
222 | { "max6696", max6696 }, | |
5a4e5e6a | 223 | { "nct1008", adt7461 }, |
6771ea1f | 224 | { "w83l771", w83l771 }, |
2ef01793 | 225 | { "sa56004", sa56004 }, |
9b0e8526 JD |
226 | { } |
227 | }; | |
228 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
229 | ||
4667bcb8 GR |
230 | /* |
231 | * chip type specific parameters | |
232 | */ | |
233 | struct lm90_params { | |
234 | u32 flags; /* Capabilities */ | |
235 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
236 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 237 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 238 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
239 | }; |
240 | ||
241 | static const struct lm90_params lm90_params[] = { | |
242 | [adm1032] = { | |
1179324c GR |
243 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
244 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 245 | .alert_alarms = 0x7c, |
0c01b644 | 246 | .max_convrate = 10, |
4667bcb8 GR |
247 | }, |
248 | [adt7461] = { | |
1179324c GR |
249 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
250 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 251 | .alert_alarms = 0x7c, |
0c01b644 | 252 | .max_convrate = 10, |
4667bcb8 | 253 | }, |
ae544f64 GR |
254 | [g781] = { |
255 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | |
256 | | LM90_HAVE_BROKEN_ALERT, | |
257 | .alert_alarms = 0x7c, | |
258 | .max_convrate = 8, | |
259 | }, | |
4667bcb8 GR |
260 | [lm86] = { |
261 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
262 | .alert_alarms = 0x7b, | |
0c01b644 | 263 | .max_convrate = 9, |
4667bcb8 GR |
264 | }, |
265 | [lm90] = { | |
266 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
267 | .alert_alarms = 0x7b, | |
0c01b644 | 268 | .max_convrate = 9, |
4667bcb8 GR |
269 | }, |
270 | [lm99] = { | |
271 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
272 | .alert_alarms = 0x7b, | |
0c01b644 | 273 | .max_convrate = 9, |
4667bcb8 GR |
274 | }, |
275 | [max6646] = { | |
4667bcb8 | 276 | .alert_alarms = 0x7c, |
0c01b644 | 277 | .max_convrate = 6, |
2ef01793 | 278 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
279 | }, |
280 | [max6657] = { | |
4667bcb8 | 281 | .alert_alarms = 0x7c, |
0c01b644 | 282 | .max_convrate = 8, |
2ef01793 | 283 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
284 | }, |
285 | [max6659] = { | |
a095f687 | 286 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 287 | .alert_alarms = 0x7c, |
0c01b644 | 288 | .max_convrate = 8, |
2ef01793 | 289 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
290 | }, |
291 | [max6680] = { | |
292 | .flags = LM90_HAVE_OFFSET, | |
293 | .alert_alarms = 0x7c, | |
0c01b644 | 294 | .max_convrate = 7, |
4667bcb8 GR |
295 | }, |
296 | [max6696] = { | |
a095f687 | 297 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 | 298 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
e41fae2b | 299 | .alert_alarms = 0x1c7c, |
0c01b644 | 300 | .max_convrate = 6, |
2ef01793 | 301 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
302 | }, |
303 | [w83l771] = { | |
304 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
305 | .alert_alarms = 0x7c, | |
0c01b644 | 306 | .max_convrate = 8, |
4667bcb8 | 307 | }, |
2ef01793 | 308 | [sa56004] = { |
a095f687 | 309 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
310 | .alert_alarms = 0x7b, |
311 | .max_convrate = 9, | |
312 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
313 | }, | |
4667bcb8 GR |
314 | }; |
315 | ||
1da177e4 LT |
316 | /* |
317 | * Client data (each client gets its own) | |
318 | */ | |
319 | ||
320 | struct lm90_data { | |
1beeffe4 | 321 | struct device *hwmon_dev; |
9a61bf63 | 322 | struct mutex update_lock; |
1da177e4 LT |
323 | char valid; /* zero until following fields are valid */ |
324 | unsigned long last_updated; /* in jiffies */ | |
325 | int kind; | |
4667bcb8 | 326 | u32 flags; |
1da177e4 | 327 | |
0c01b644 GR |
328 | int update_interval; /* in milliseconds */ |
329 | ||
95238364 | 330 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 331 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
332 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
333 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 334 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 335 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 336 | |
1da177e4 | 337 | /* registers values */ |
06e1c0a2 | 338 | s8 temp8[8]; /* 0: local low limit |
f36ffeab GR |
339 | * 1: local high limit |
340 | * 2: local critical limit | |
341 | * 3: remote critical limit | |
342 | * 4: local emergency limit (max6659 and max6695/96) | |
343 | * 5: remote emergency limit (max6659 and max6695/96) | |
344 | * 6: remote 2 critical limit (max6695/96 only) | |
345 | * 7: remote 2 emergency limit (max6695/96 only) | |
346 | */ | |
06e1c0a2 | 347 | s16 temp11[8]; /* 0: remote input |
f36ffeab GR |
348 | * 1: remote low limit |
349 | * 2: remote high limit | |
350 | * 3: remote offset (except max6646, max6657/58/59, | |
351 | * and max6695/96) | |
352 | * 4: local input | |
353 | * 5: remote 2 input (max6695/96 only) | |
354 | * 6: remote 2 low limit (max6695/96 only) | |
355 | * 7: remote 2 high limit (max6695/96 only) | |
356 | */ | |
1da177e4 | 357 | u8 temp_hyst; |
06e1c0a2 | 358 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
359 | }; |
360 | ||
15b66ab6 GR |
361 | /* |
362 | * Support functions | |
363 | */ | |
364 | ||
365 | /* | |
366 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
367 | * to explicitly ask for a transaction without PEC. | |
368 | */ | |
369 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
370 | { | |
371 | return i2c_smbus_xfer(client->adapter, client->addr, | |
372 | client->flags & ~I2C_CLIENT_PEC, | |
373 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
374 | } | |
375 | ||
376 | /* | |
377 | * It is assumed that client->update_lock is held (unless we are in | |
378 | * detection or initialization steps). This matters when PEC is enabled, | |
379 | * because we don't want the address pointer to change between the write | |
380 | * byte and the read byte transactions. | |
381 | */ | |
382 | static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value) | |
383 | { | |
384 | int err; | |
385 | ||
386 | if (client->flags & I2C_CLIENT_PEC) { | |
387 | err = adm1032_write_byte(client, reg); | |
388 | if (err >= 0) | |
389 | err = i2c_smbus_read_byte(client); | |
390 | } else | |
391 | err = i2c_smbus_read_byte_data(client, reg); | |
392 | ||
393 | if (err < 0) { | |
394 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
395 | reg, err); | |
396 | return err; | |
397 | } | |
398 | *value = err; | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) | |
404 | { | |
405 | int err; | |
406 | u8 oldh, newh, l; | |
407 | ||
408 | /* | |
409 | * There is a trick here. We have to read two registers to have the | |
410 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 411 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
412 | * the one-shot conversion register, which we don't want to do |
413 | * (disables hardware monitoring) or monitor the busy bit, which is | |
414 | * impossible (we can't read the values and monitor that bit at the | |
415 | * exact same time). So the solution used here is to read the high | |
416 | * byte once, then the low byte, then the high byte again. If the new | |
417 | * high byte matches the old one, then we have a valid reading. Else | |
418 | * we have to read the low byte again, and now we believe we have a | |
419 | * correct reading. | |
420 | */ | |
421 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
422 | || (err = lm90_read_reg(client, regl, &l)) | |
423 | || (err = lm90_read_reg(client, regh, &newh))) | |
424 | return err; | |
425 | if (oldh != newh) { | |
426 | err = lm90_read_reg(client, regl, &l); | |
427 | if (err) | |
428 | return err; | |
429 | } | |
430 | *value = (newh << 8) | l; | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | /* | |
436 | * client->update_lock must be held when calling this function (unless we are | |
437 | * in detection or initialization steps), and while a remote channel other | |
438 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
439 | * external channel 0 before releasing the lock. This is necessary because | |
440 | * various registers have different meanings as a result of selecting a | |
441 | * non-default remote channel. | |
442 | */ | |
443 | static inline void lm90_select_remote_channel(struct i2c_client *client, | |
444 | struct lm90_data *data, | |
445 | int channel) | |
446 | { | |
447 | u8 config; | |
448 | ||
449 | if (data->kind == max6696) { | |
450 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
451 | config &= ~0x08; | |
452 | if (channel) | |
453 | config |= 0x08; | |
454 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
455 | config); | |
456 | } | |
457 | } | |
458 | ||
0c01b644 GR |
459 | /* |
460 | * Set conversion rate. | |
461 | * client->update_lock must be held when calling this function (unless we are | |
462 | * in detection or initialization steps). | |
463 | */ | |
464 | static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, | |
465 | unsigned int interval) | |
466 | { | |
467 | int i; | |
468 | unsigned int update_interval; | |
469 | ||
470 | /* Shift calculations to avoid rounding errors */ | |
471 | interval <<= 6; | |
472 | ||
473 | /* find the nearest update rate */ | |
474 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
475 | i < data->max_convrate; i++, update_interval >>= 1) | |
476 | if (interval >= update_interval * 3 / 4) | |
477 | break; | |
478 | ||
479 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); | |
480 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); | |
481 | } | |
482 | ||
15b66ab6 GR |
483 | static struct lm90_data *lm90_update_device(struct device *dev) |
484 | { | |
485 | struct i2c_client *client = to_i2c_client(dev); | |
486 | struct lm90_data *data = i2c_get_clientdata(client); | |
0c01b644 | 487 | unsigned long next_update; |
15b66ab6 GR |
488 | |
489 | mutex_lock(&data->update_lock); | |
490 | ||
78c2c2fe JD |
491 | next_update = data->last_updated + |
492 | msecs_to_jiffies(data->update_interval); | |
0c01b644 | 493 | if (time_after(jiffies, next_update) || !data->valid) { |
15b66ab6 GR |
494 | u8 h, l; |
495 | u8 alarms; | |
496 | ||
497 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
498 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]); | |
499 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]); | |
500 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]); | |
501 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]); | |
502 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); | |
503 | ||
a095f687 | 504 | if (data->reg_local_ext) { |
15b66ab6 | 505 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
2ef01793 | 506 | data->reg_local_ext, |
15b66ab6 GR |
507 | &data->temp11[4]); |
508 | } else { | |
509 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
510 | &h) == 0) | |
511 | data->temp11[4] = h << 8; | |
512 | } | |
513 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
514 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]); | |
515 | ||
516 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { | |
517 | data->temp11[1] = h << 8; | |
518 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) | |
519 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, | |
520 | &l) == 0) | |
521 | data->temp11[1] |= l; | |
522 | } | |
523 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
524 | data->temp11[2] = h << 8; | |
525 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) | |
526 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, | |
527 | &l) == 0) | |
528 | data->temp11[2] |= l; | |
529 | } | |
530 | ||
531 | if (data->flags & LM90_HAVE_OFFSET) { | |
532 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, | |
533 | &h) == 0 | |
534 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, | |
535 | &l) == 0) | |
536 | data->temp11[3] = (h << 8) | l; | |
537 | } | |
538 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
539 | lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG, | |
540 | &data->temp8[4]); | |
541 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, | |
542 | &data->temp8[5]); | |
543 | } | |
544 | lm90_read_reg(client, LM90_REG_R_STATUS, &alarms); | |
545 | data->alarms = alarms; /* save as 16 bit value */ | |
546 | ||
547 | if (data->kind == max6696) { | |
548 | lm90_select_remote_channel(client, data, 1); | |
549 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
550 | &data->temp8[6]); | |
551 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, | |
552 | &data->temp8[7]); | |
553 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
554 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]); | |
555 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h)) | |
556 | data->temp11[6] = h << 8; | |
557 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h)) | |
558 | data->temp11[7] = h << 8; | |
559 | lm90_select_remote_channel(client, data, 0); | |
560 | ||
561 | if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2, | |
562 | &alarms)) | |
563 | data->alarms |= alarms << 8; | |
564 | } | |
565 | ||
f36ffeab GR |
566 | /* |
567 | * Re-enable ALERT# output if it was originally enabled and | |
568 | * relevant alarms are all clear | |
569 | */ | |
15b66ab6 GR |
570 | if ((data->config_orig & 0x80) == 0 |
571 | && (data->alarms & data->alert_alarms) == 0) { | |
572 | u8 config; | |
573 | ||
574 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
575 | if (config & 0x80) { | |
576 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); | |
577 | i2c_smbus_write_byte_data(client, | |
578 | LM90_REG_W_CONFIG1, | |
579 | config & ~0x80); | |
580 | } | |
581 | } | |
582 | ||
583 | data->last_updated = jiffies; | |
584 | data->valid = 1; | |
585 | } | |
586 | ||
587 | mutex_unlock(&data->update_lock); | |
588 | ||
589 | return data; | |
590 | } | |
591 | ||
cea50fe2 NC |
592 | /* |
593 | * Conversions | |
594 | * For local temperatures and limits, critical limits and the hysteresis | |
595 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
596 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
597 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
598 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
599 | */ |
600 | ||
9d4d3834 | 601 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
602 | { |
603 | return val * 1000; | |
604 | } | |
605 | ||
271dabf5 BH |
606 | static inline int temp_from_u8(u8 val) |
607 | { | |
608 | return val * 1000; | |
609 | } | |
610 | ||
9d4d3834 | 611 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
612 | { |
613 | return val / 32 * 125; | |
614 | } | |
615 | ||
271dabf5 BH |
616 | static inline int temp_from_u16(u16 val) |
617 | { | |
618 | return val / 32 * 125; | |
619 | } | |
620 | ||
9d4d3834 | 621 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
622 | { |
623 | if (val <= -128000) | |
624 | return -128; | |
625 | if (val >= 127000) | |
626 | return 127; | |
627 | if (val < 0) | |
628 | return (val - 500) / 1000; | |
629 | return (val + 500) / 1000; | |
630 | } | |
631 | ||
271dabf5 BH |
632 | static u8 temp_to_u8(long val) |
633 | { | |
634 | if (val <= 0) | |
635 | return 0; | |
636 | if (val >= 255000) | |
637 | return 255; | |
638 | return (val + 500) / 1000; | |
639 | } | |
640 | ||
9d4d3834 | 641 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
642 | { |
643 | if (val <= -128000) | |
644 | return 0x8000; | |
645 | if (val >= 127875) | |
646 | return 0x7FE0; | |
647 | if (val < 0) | |
648 | return (val - 62) / 125 * 32; | |
649 | return (val + 62) / 125 * 32; | |
650 | } | |
651 | ||
652 | static u8 hyst_to_reg(long val) | |
653 | { | |
654 | if (val <= 0) | |
655 | return 0; | |
656 | if (val >= 30500) | |
657 | return 31; | |
658 | return (val + 500) / 1000; | |
659 | } | |
660 | ||
661 | /* | |
23b2d477 NC |
662 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
663 | * attempts to write values that are outside the range 0 < temp < 127 are | |
664 | * treated as the boundary value. | |
665 | * | |
666 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
667 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 668 | */ |
9d4d3834 | 669 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 670 | { |
23b2d477 NC |
671 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
672 | return (val - 64) * 1000; | |
673 | else | |
9d4d3834 | 674 | return temp_from_s8(val); |
cea50fe2 NC |
675 | } |
676 | ||
9d4d3834 | 677 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 678 | { |
23b2d477 NC |
679 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
680 | return (val - 0x4000) / 64 * 250; | |
681 | else | |
9d4d3834 | 682 | return temp_from_s16(val); |
23b2d477 NC |
683 | } |
684 | ||
9d4d3834 | 685 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
686 | { |
687 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
688 | if (val <= -64000) | |
689 | return 0; | |
690 | if (val >= 191000) | |
691 | return 0xFF; | |
692 | return (val + 500 + 64000) / 1000; | |
693 | } else { | |
694 | if (val <= 0) | |
695 | return 0; | |
696 | if (val >= 127000) | |
697 | return 127; | |
698 | return (val + 500) / 1000; | |
699 | } | |
700 | } | |
701 | ||
9d4d3834 | 702 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
703 | { |
704 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
705 | if (val <= -64000) | |
706 | return 0; | |
707 | if (val >= 191750) | |
708 | return 0xFFC0; | |
709 | return (val + 64000 + 125) / 250 * 64; | |
710 | } else { | |
711 | if (val <= 0) | |
712 | return 0; | |
713 | if (val >= 127750) | |
714 | return 0x7FC0; | |
715 | return (val + 125) / 250 * 64; | |
716 | } | |
cea50fe2 NC |
717 | } |
718 | ||
1da177e4 LT |
719 | /* |
720 | * Sysfs stuff | |
721 | */ | |
722 | ||
30d7394b JD |
723 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
724 | char *buf) | |
725 | { | |
726 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
727 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
728 | int temp; |
729 | ||
730 | if (data->kind == adt7461) | |
9d4d3834 | 731 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
732 | else if (data->kind == max6646) |
733 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 734 | else |
9d4d3834 | 735 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 736 | |
97ae60bb JD |
737 | /* +16 degrees offset for temp2 for the LM99 */ |
738 | if (data->kind == lm99 && attr->index == 3) | |
739 | temp += 16000; | |
740 | ||
23b2d477 | 741 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
742 | } |
743 | ||
744 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
745 | const char *buf, size_t count) | |
746 | { | |
06e1c0a2 | 747 | static const u8 reg[8] = { |
30d7394b JD |
748 | LM90_REG_W_LOCAL_LOW, |
749 | LM90_REG_W_LOCAL_HIGH, | |
750 | LM90_REG_W_LOCAL_CRIT, | |
751 | LM90_REG_W_REMOTE_CRIT, | |
6948708d GR |
752 | MAX6659_REG_W_LOCAL_EMERG, |
753 | MAX6659_REG_W_REMOTE_EMERG, | |
06e1c0a2 GR |
754 | LM90_REG_W_REMOTE_CRIT, |
755 | MAX6659_REG_W_REMOTE_EMERG, | |
30d7394b JD |
756 | }; |
757 | ||
758 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
759 | struct i2c_client *client = to_i2c_client(dev); | |
760 | struct lm90_data *data = i2c_get_clientdata(client); | |
30d7394b | 761 | int nr = attr->index; |
11e57812 GR |
762 | long val; |
763 | int err; | |
764 | ||
179c4fdb | 765 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
766 | if (err < 0) |
767 | return err; | |
30d7394b | 768 | |
97ae60bb JD |
769 | /* +16 degrees offset for temp2 for the LM99 */ |
770 | if (data->kind == lm99 && attr->index == 3) | |
771 | val -= 16000; | |
772 | ||
9a61bf63 | 773 | mutex_lock(&data->update_lock); |
30d7394b | 774 | if (data->kind == adt7461) |
9d4d3834 | 775 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
776 | else if (data->kind == max6646) |
777 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 778 | else |
9d4d3834 | 779 | data->temp8[nr] = temp_to_s8(val); |
06e1c0a2 GR |
780 | |
781 | lm90_select_remote_channel(client, data, nr >= 6); | |
f65e1708 | 782 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
06e1c0a2 GR |
783 | lm90_select_remote_channel(client, data, 0); |
784 | ||
9a61bf63 | 785 | mutex_unlock(&data->update_lock); |
30d7394b | 786 | return count; |
1da177e4 | 787 | } |
30d7394b JD |
788 | |
789 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
790 | char *buf) | |
791 | { | |
96512861 | 792 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b | 793 | struct lm90_data *data = lm90_update_device(dev); |
23b2d477 NC |
794 | int temp; |
795 | ||
796 | if (data->kind == adt7461) | |
9d4d3834 | 797 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
798 | else if (data->kind == max6646) |
799 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 800 | else |
9d4d3834 | 801 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 802 | |
97ae60bb JD |
803 | /* +16 degrees offset for temp2 for the LM99 */ |
804 | if (data->kind == lm99 && attr->index <= 2) | |
805 | temp += 16000; | |
806 | ||
23b2d477 | 807 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 808 | } |
30d7394b JD |
809 | |
810 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
811 | const char *buf, size_t count) | |
812 | { | |
96512861 GR |
813 | struct { |
814 | u8 high; | |
815 | u8 low; | |
06e1c0a2 GR |
816 | int channel; |
817 | } reg[5] = { | |
818 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 }, | |
819 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 }, | |
820 | { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 }, | |
821 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 }, | |
822 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } | |
30d7394b JD |
823 | }; |
824 | ||
96512861 | 825 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b JD |
826 | struct i2c_client *client = to_i2c_client(dev); |
827 | struct lm90_data *data = i2c_get_clientdata(client); | |
96512861 GR |
828 | int nr = attr->nr; |
829 | int index = attr->index; | |
11e57812 GR |
830 | long val; |
831 | int err; | |
832 | ||
179c4fdb | 833 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
834 | if (err < 0) |
835 | return err; | |
30d7394b | 836 | |
97ae60bb | 837 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 838 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
839 | val -= 16000; |
840 | ||
9a61bf63 | 841 | mutex_lock(&data->update_lock); |
30d7394b | 842 | if (data->kind == adt7461) |
96512861 | 843 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 844 | else if (data->kind == max6646) |
96512861 | 845 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 846 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 847 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 848 | else |
96512861 | 849 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 850 | |
06e1c0a2 | 851 | lm90_select_remote_channel(client, data, reg[nr].channel); |
96512861 GR |
852 | i2c_smbus_write_byte_data(client, reg[nr].high, |
853 | data->temp11[index] >> 8); | |
88073bb1 | 854 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 GR |
855 | i2c_smbus_write_byte_data(client, reg[nr].low, |
856 | data->temp11[index] & 0xff); | |
06e1c0a2 GR |
857 | lm90_select_remote_channel(client, data, 0); |
858 | ||
9a61bf63 | 859 | mutex_unlock(&data->update_lock); |
30d7394b | 860 | return count; |
1da177e4 | 861 | } |
30d7394b | 862 | |
11e57812 GR |
863 | static ssize_t show_temphyst(struct device *dev, |
864 | struct device_attribute *devattr, | |
30d7394b JD |
865 | char *buf) |
866 | { | |
867 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
868 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
869 | int temp; |
870 | ||
871 | if (data->kind == adt7461) | |
9d4d3834 | 872 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
873 | else if (data->kind == max6646) |
874 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 875 | else |
9d4d3834 | 876 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 877 | |
97ae60bb JD |
878 | /* +16 degrees offset for temp2 for the LM99 */ |
879 | if (data->kind == lm99 && attr->index == 3) | |
880 | temp += 16000; | |
881 | ||
9d4d3834 | 882 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 883 | } |
1da177e4 | 884 | |
30d7394b JD |
885 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
886 | const char *buf, size_t count) | |
1da177e4 LT |
887 | { |
888 | struct i2c_client *client = to_i2c_client(dev); | |
889 | struct lm90_data *data = i2c_get_clientdata(client); | |
11e57812 GR |
890 | long val; |
891 | int err; | |
ec38fa2b | 892 | int temp; |
1da177e4 | 893 | |
179c4fdb | 894 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
895 | if (err < 0) |
896 | return err; | |
897 | ||
9a61bf63 | 898 | mutex_lock(&data->update_lock); |
ec38fa2b JD |
899 | if (data->kind == adt7461) |
900 | temp = temp_from_u8_adt7461(data, data->temp8[2]); | |
901 | else if (data->kind == max6646) | |
902 | temp = temp_from_u8(data->temp8[2]); | |
903 | else | |
904 | temp = temp_from_s8(data->temp8[2]); | |
905 | ||
906 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 907 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 908 | data->temp_hyst); |
9a61bf63 | 909 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
910 | return count; |
911 | } | |
912 | ||
30d7394b JD |
913 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
914 | char *buf) | |
1da177e4 LT |
915 | { |
916 | struct lm90_data *data = lm90_update_device(dev); | |
917 | return sprintf(buf, "%d\n", data->alarms); | |
918 | } | |
919 | ||
2d45771e JD |
920 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
921 | *devattr, char *buf) | |
922 | { | |
923 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
924 | struct lm90_data *data = lm90_update_device(dev); | |
925 | int bitnr = attr->index; | |
926 | ||
927 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
928 | } | |
929 | ||
0c01b644 GR |
930 | static ssize_t show_update_interval(struct device *dev, |
931 | struct device_attribute *attr, char *buf) | |
932 | { | |
933 | struct lm90_data *data = dev_get_drvdata(dev); | |
934 | ||
935 | return sprintf(buf, "%u\n", data->update_interval); | |
936 | } | |
937 | ||
938 | static ssize_t set_update_interval(struct device *dev, | |
939 | struct device_attribute *attr, | |
940 | const char *buf, size_t count) | |
941 | { | |
942 | struct i2c_client *client = to_i2c_client(dev); | |
943 | struct lm90_data *data = i2c_get_clientdata(client); | |
944 | unsigned long val; | |
945 | int err; | |
946 | ||
179c4fdb | 947 | err = kstrtoul(buf, 10, &val); |
0c01b644 GR |
948 | if (err) |
949 | return err; | |
950 | ||
951 | mutex_lock(&data->update_lock); | |
2a844c14 | 952 | lm90_set_convrate(client, data, clamp_val(val, 0, 100000)); |
0c01b644 GR |
953 | mutex_unlock(&data->update_lock); |
954 | ||
955 | return count; | |
956 | } | |
957 | ||
96512861 GR |
958 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4); |
959 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0); | |
30d7394b | 960 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 961 | set_temp8, 0); |
96512861 GR |
962 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
963 | set_temp11, 0, 1); | |
30d7394b | 964 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 965 | set_temp8, 1); |
96512861 GR |
966 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
967 | set_temp11, 1, 2); | |
30d7394b | 968 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 969 | set_temp8, 2); |
30d7394b | 970 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 971 | set_temp8, 3); |
30d7394b | 972 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
f65e1708 JD |
973 | set_temphyst, 2); |
974 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3); | |
96512861 GR |
975 | static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
976 | set_temp11, 2, 3); | |
2d45771e JD |
977 | |
978 | /* Individual alarm files */ | |
979 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
980 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 981 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
982 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
983 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
984 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
985 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
986 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
987 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
988 | ||
0c01b644 GR |
989 | static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, |
990 | set_update_interval); | |
991 | ||
0e39e01c JD |
992 | static struct attribute *lm90_attributes[] = { |
993 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
994 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
995 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
996 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
997 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
998 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
999 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
1000 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
1001 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
1002 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
1003 | ||
1004 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
1005 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 1006 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
1007 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
1008 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
1009 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
1010 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
1011 | &dev_attr_alarms.attr, | |
0c01b644 | 1012 | &dev_attr_update_interval.attr, |
0e39e01c JD |
1013 | NULL |
1014 | }; | |
1015 | ||
1016 | static const struct attribute_group lm90_group = { | |
1017 | .attrs = lm90_attributes, | |
1018 | }; | |
1019 | ||
6948708d GR |
1020 | /* |
1021 | * Additional attributes for devices with emergency sensors | |
1022 | */ | |
1023 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
1024 | set_temp8, 4); | |
1025 | static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
1026 | set_temp8, 5); | |
1027 | static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst, | |
1028 | NULL, 4); | |
1029 | static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst, | |
1030 | NULL, 5); | |
1031 | ||
1032 | static struct attribute *lm90_emergency_attributes[] = { | |
1033 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, | |
1034 | &sensor_dev_attr_temp2_emergency.dev_attr.attr, | |
1035 | &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr, | |
1036 | &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr, | |
1037 | NULL | |
1038 | }; | |
1039 | ||
1040 | static const struct attribute_group lm90_emergency_group = { | |
1041 | .attrs = lm90_emergency_attributes, | |
1042 | }; | |
1043 | ||
06e1c0a2 GR |
1044 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15); |
1045 | static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1046 | ||
1047 | static struct attribute *lm90_emergency_alarm_attributes[] = { | |
1048 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, | |
1049 | &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, | |
1050 | NULL | |
1051 | }; | |
1052 | ||
1053 | static const struct attribute_group lm90_emergency_alarm_group = { | |
1054 | .attrs = lm90_emergency_alarm_attributes, | |
1055 | }; | |
1056 | ||
1057 | /* | |
1058 | * Additional attributes for devices with 3 temperature sensors | |
1059 | */ | |
1060 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5); | |
1061 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11, | |
1062 | set_temp11, 3, 6); | |
1063 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11, | |
1064 | set_temp11, 4, 7); | |
1065 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8, | |
1066 | set_temp8, 6); | |
1067 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6); | |
1068 | static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
1069 | set_temp8, 7); | |
1070 | static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst, | |
1071 | NULL, 7); | |
1072 | ||
1073 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
1074 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10); | |
1075 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11); | |
1076 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12); | |
1077 | static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14); | |
1078 | ||
1079 | static struct attribute *lm90_temp3_attributes[] = { | |
1080 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
1081 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
1082 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
1083 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
1084 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
1085 | &sensor_dev_attr_temp3_emergency.dev_attr.attr, | |
1086 | &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr, | |
1087 | ||
1088 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
1089 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
1090 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
1091 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
1092 | &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr, | |
1093 | NULL | |
1094 | }; | |
1095 | ||
1096 | static const struct attribute_group lm90_temp3_group = { | |
1097 | .attrs = lm90_temp3_attributes, | |
1098 | }; | |
1099 | ||
c3df5806 JD |
1100 | /* pec used for ADM1032 only */ |
1101 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
1102 | char *buf) | |
1103 | { | |
1104 | struct i2c_client *client = to_i2c_client(dev); | |
1105 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
1106 | } | |
1107 | ||
1108 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
1109 | const char *buf, size_t count) | |
1110 | { | |
1111 | struct i2c_client *client = to_i2c_client(dev); | |
11e57812 GR |
1112 | long val; |
1113 | int err; | |
1114 | ||
179c4fdb | 1115 | err = kstrtol(buf, 10, &val); |
11e57812 GR |
1116 | if (err < 0) |
1117 | return err; | |
c3df5806 JD |
1118 | |
1119 | switch (val) { | |
1120 | case 0: | |
1121 | client->flags &= ~I2C_CLIENT_PEC; | |
1122 | break; | |
1123 | case 1: | |
1124 | client->flags |= I2C_CLIENT_PEC; | |
1125 | break; | |
1126 | default: | |
1127 | return -EINVAL; | |
1128 | } | |
1129 | ||
1130 | return count; | |
1131 | } | |
1132 | ||
1133 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
1134 | ||
1da177e4 LT |
1135 | /* |
1136 | * Real code | |
1137 | */ | |
1138 | ||
15b66ab6 | 1139 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
b2589ab0 | 1140 | static int lm90_detect(struct i2c_client *client, |
15b66ab6 | 1141 | struct i2c_board_info *info) |
8256fe0f | 1142 | { |
b2589ab0 JD |
1143 | struct i2c_adapter *adapter = client->adapter; |
1144 | int address = client->addr; | |
15b66ab6 | 1145 | const char *name = NULL; |
b2589ab0 | 1146 | int man_id, chip_id, config1, config2, convrate; |
8256fe0f | 1147 | |
15b66ab6 GR |
1148 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1149 | return -ENODEV; | |
1da177e4 | 1150 | |
8f2fa77c | 1151 | /* detection and identification */ |
b2589ab0 JD |
1152 | man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID); |
1153 | chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID); | |
1154 | config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1); | |
1155 | convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE); | |
1156 | if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0) | |
8f2fa77c JD |
1157 | return -ENODEV; |
1158 | ||
f90be42f | 1159 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
b2589ab0 JD |
1160 | config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2); |
1161 | if (config2 < 0) | |
9b0e8526 | 1162 | return -ENODEV; |
f90be42f | 1163 | } else |
b2589ab0 | 1164 | config2 = 0; /* Make compiler happy */ |
8f2fa77c | 1165 | |
f90be42f JD |
1166 | if ((address == 0x4C || address == 0x4D) |
1167 | && man_id == 0x01) { /* National Semiconductor */ | |
b2589ab0 JD |
1168 | if ((config1 & 0x2A) == 0x00 |
1169 | && (config2 & 0xF8) == 0x00 | |
1170 | && convrate <= 0x09) { | |
8f2fa77c JD |
1171 | if (address == 0x4C |
1172 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1173 | name = "lm90"; | |
32c82a93 | 1174 | } else |
8f2fa77c JD |
1175 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1176 | name = "lm99"; | |
1177 | dev_info(&adapter->dev, | |
1178 | "Assuming LM99 chip at 0x%02x\n", | |
1179 | address); | |
1180 | dev_info(&adapter->dev, | |
1181 | "If it is an LM89, instantiate it " | |
1182 | "with the new_device sysfs " | |
1183 | "interface\n"); | |
271dabf5 | 1184 | } else |
8f2fa77c JD |
1185 | if (address == 0x4C |
1186 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1187 | name = "lm86"; | |
1da177e4 LT |
1188 | } |
1189 | } | |
8f2fa77c JD |
1190 | } else |
1191 | if ((address == 0x4C || address == 0x4D) | |
1192 | && man_id == 0x41) { /* Analog Devices */ | |
1193 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
b2589ab0 JD |
1194 | && (config1 & 0x3F) == 0x00 |
1195 | && convrate <= 0x0A) { | |
8f2fa77c | 1196 | name = "adm1032"; |
f36ffeab GR |
1197 | /* |
1198 | * The ADM1032 supports PEC, but only if combined | |
1199 | * transactions are not used. | |
1200 | */ | |
8f2fa77c JD |
1201 | if (i2c_check_functionality(adapter, |
1202 | I2C_FUNC_SMBUS_BYTE)) | |
1203 | info->flags |= I2C_CLIENT_PEC; | |
1204 | } else | |
1205 | if (chip_id == 0x51 /* ADT7461 */ | |
b2589ab0 JD |
1206 | && (config1 & 0x1B) == 0x00 |
1207 | && convrate <= 0x0A) { | |
8f2fa77c | 1208 | name = "adt7461"; |
5a4e5e6a GR |
1209 | } else |
1210 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
b2589ab0 JD |
1211 | && (config1 & 0x1B) == 0x00 |
1212 | && convrate <= 0x0A) { | |
5a4e5e6a | 1213 | name = "adt7461a"; |
8f2fa77c JD |
1214 | } |
1215 | } else | |
1216 | if (man_id == 0x4D) { /* Maxim */ | |
b2589ab0 | 1217 | int emerg, emerg2, status2; |
06e1c0a2 GR |
1218 | |
1219 | /* | |
1220 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1221 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1222 | * exists, both readings will reflect the same value. Otherwise, | |
1223 | * the readings will be different. | |
1224 | */ | |
b2589ab0 JD |
1225 | emerg = i2c_smbus_read_byte_data(client, |
1226 | MAX6659_REG_R_REMOTE_EMERG); | |
1227 | man_id = i2c_smbus_read_byte_data(client, | |
8dc089d6 | 1228 | LM90_REG_R_MAN_ID); |
b2589ab0 | 1229 | emerg2 = i2c_smbus_read_byte_data(client, |
8dc089d6 | 1230 | MAX6659_REG_R_REMOTE_EMERG); |
b2589ab0 JD |
1231 | status2 = i2c_smbus_read_byte_data(client, |
1232 | MAX6696_REG_R_STATUS2); | |
1233 | if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0) | |
06e1c0a2 GR |
1234 | return -ENODEV; |
1235 | ||
8f2fa77c JD |
1236 | /* |
1237 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1238 | * register. Reading from that address will return the last | |
1239 | * read value, which in our case is those of the man_id | |
1240 | * register. Likewise, the config1 register seems to lack a | |
1241 | * low nibble, so the value will be those of the previous | |
1242 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1243 | * MAX6659 has a third set of upper temperature limit registers. |
1244 | * Those registers also return values on MAX6657 and MAX6658, | |
1245 | * thus the only way to detect MAX6659 is by its address. | |
1246 | * For this reason it will be mis-detected as MAX6657 if its | |
1247 | * address is 0x4C. | |
8f2fa77c JD |
1248 | */ |
1249 | if (chip_id == man_id | |
13c84951 | 1250 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
b2589ab0 JD |
1251 | && (config1 & 0x1F) == (man_id & 0x0F) |
1252 | && convrate <= 0x09) { | |
13c84951 GR |
1253 | if (address == 0x4C) |
1254 | name = "max6657"; | |
1255 | else | |
1256 | name = "max6659"; | |
8f2fa77c | 1257 | } else |
06e1c0a2 GR |
1258 | /* |
1259 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1260 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1261 | * register is unused and should return zero when read. Bit 0 of | |
1262 | * the status2 register is unused and should return zero when | |
1263 | * read. | |
1264 | * | |
1265 | * MAX6695 and MAX6696 have an additional set of temperature | |
1266 | * limit registers. We can detect those chips by checking if | |
1267 | * one of those registers exists. | |
1268 | */ | |
1269 | if (chip_id == 0x01 | |
b2589ab0 JD |
1270 | && (config1 & 0x10) == 0x00 |
1271 | && (status2 & 0x01) == 0x00 | |
1272 | && emerg == emerg2 | |
1273 | && convrate <= 0x07) { | |
06e1c0a2 GR |
1274 | name = "max6696"; |
1275 | } else | |
8f2fa77c JD |
1276 | /* |
1277 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1278 | * revision of the chip. The lowest bit of the config1 register | |
1279 | * is unused and should return zero when read, so should the | |
1280 | * second to last bit of config1 (software reset). | |
1281 | */ | |
1282 | if (chip_id == 0x01 | |
b2589ab0 JD |
1283 | && (config1 & 0x03) == 0x00 |
1284 | && convrate <= 0x07) { | |
8f2fa77c JD |
1285 | name = "max6680"; |
1286 | } else | |
1287 | /* | |
1288 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1289 | * revision of the chip. The lowest 6 bits of the config1 | |
1290 | * register are unused and should return zero when read. | |
1291 | */ | |
1292 | if (chip_id == 0x59 | |
b2589ab0 JD |
1293 | && (config1 & 0x3f) == 0x00 |
1294 | && convrate <= 0x07) { | |
8f2fa77c | 1295 | name = "max6646"; |
1da177e4 | 1296 | } |
6771ea1f JD |
1297 | } else |
1298 | if (address == 0x4C | |
1299 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
b2589ab0 JD |
1300 | if ((config1 & 0x2A) == 0x00 |
1301 | && (config2 & 0xF8) == 0x00) { | |
c4f99a2b | 1302 | if (chip_id == 0x01 /* W83L771W/G */ |
b2589ab0 | 1303 | && convrate <= 0x09) { |
c4f99a2b JD |
1304 | name = "w83l771"; |
1305 | } else | |
1306 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
b2589ab0 | 1307 | && convrate <= 0x08) { |
c4f99a2b JD |
1308 | name = "w83l771"; |
1309 | } | |
6771ea1f | 1310 | } |
2ef01793 | 1311 | } else |
6d101c58 JD |
1312 | if (address >= 0x48 && address <= 0x4F |
1313 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 | 1314 | if (chip_id == 0x00 |
b2589ab0 JD |
1315 | && (config1 & 0x2A) == 0x00 |
1316 | && (config2 & 0xFE) == 0x00 | |
1317 | && convrate <= 0x09) { | |
2ef01793 SD |
1318 | name = "sa56004"; |
1319 | } | |
ae544f64 GR |
1320 | } else |
1321 | if ((address == 0x4C || address == 0x4D) | |
1322 | && man_id == 0x47) { /* GMT */ | |
1323 | if (chip_id == 0x01 /* G781 */ | |
1324 | && (config1 & 0x3F) == 0x00 | |
1325 | && convrate <= 0x08) | |
1326 | name = "g781"; | |
1da177e4 LT |
1327 | } |
1328 | ||
8f2fa77c JD |
1329 | if (!name) { /* identification failed */ |
1330 | dev_dbg(&adapter->dev, | |
1331 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1332 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1333 | return -ENODEV; | |
1da177e4 | 1334 | } |
8f2fa77c | 1335 | |
9b0e8526 JD |
1336 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
b6fc1bac GR |
1341 | static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data) |
1342 | { | |
b2589ab0 JD |
1343 | struct device *dev = &client->dev; |
1344 | ||
06e1c0a2 | 1345 | if (data->flags & LM90_HAVE_TEMP3) |
b2589ab0 | 1346 | sysfs_remove_group(&dev->kobj, &lm90_temp3_group); |
06e1c0a2 | 1347 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) |
b2589ab0 | 1348 | sysfs_remove_group(&dev->kobj, &lm90_emergency_alarm_group); |
6948708d | 1349 | if (data->flags & LM90_HAVE_EMERGENCY) |
b2589ab0 | 1350 | sysfs_remove_group(&dev->kobj, &lm90_emergency_group); |
b6fc1bac | 1351 | if (data->flags & LM90_HAVE_OFFSET) |
b2589ab0 JD |
1352 | device_remove_file(dev, &sensor_dev_attr_temp2_offset.dev_attr); |
1353 | device_remove_file(dev, &dev_attr_pec); | |
1354 | sysfs_remove_group(&dev->kobj, &lm90_group); | |
b6fc1bac GR |
1355 | } |
1356 | ||
f7001bb0 GR |
1357 | static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data) |
1358 | { | |
1359 | /* Restore initial configuration */ | |
1360 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, | |
1361 | data->convrate_orig); | |
1362 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1363 | data->config_orig); | |
1364 | } | |
1365 | ||
15b66ab6 GR |
1366 | static void lm90_init_client(struct i2c_client *client) |
1367 | { | |
0c01b644 | 1368 | u8 config, convrate; |
15b66ab6 GR |
1369 | struct lm90_data *data = i2c_get_clientdata(client); |
1370 | ||
0c01b644 GR |
1371 | if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) { |
1372 | dev_warn(&client->dev, "Failed to read convrate register!\n"); | |
1373 | convrate = LM90_DEF_CONVRATE_RVAL; | |
1374 | } | |
1375 | data->convrate_orig = convrate; | |
1376 | ||
15b66ab6 GR |
1377 | /* |
1378 | * Start the conversions. | |
1379 | */ | |
0c01b644 | 1380 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
15b66ab6 GR |
1381 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
1382 | dev_warn(&client->dev, "Initialization failed!\n"); | |
1383 | return; | |
1384 | } | |
1385 | data->config_orig = config; | |
1386 | ||
1387 | /* Check Temperature Range Select */ | |
1388 | if (data->kind == adt7461) { | |
1389 | if (config & 0x04) | |
1390 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1395 | * 0.125 degree resolution) and range (0x08, extend range | |
1396 | * to -64 degree) mode for the remote temperature sensor. | |
1397 | */ | |
1398 | if (data->kind == max6680) | |
1399 | config |= 0x18; | |
1400 | ||
1401 | /* | |
1402 | * Select external channel 0 for max6695/96 | |
1403 | */ | |
1404 | if (data->kind == max6696) | |
1405 | config &= ~0x08; | |
1406 | ||
1407 | config &= 0xBF; /* run */ | |
1408 | if (config != data->config_orig) /* Only write if changed */ | |
1409 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1410 | } | |
1411 | ||
072de496 WN |
1412 | static bool lm90_is_tripped(struct i2c_client *client, u16 *status) |
1413 | { | |
1414 | struct lm90_data *data = i2c_get_clientdata(client); | |
1415 | u8 st, st2 = 0; | |
1416 | ||
1417 | lm90_read_reg(client, LM90_REG_R_STATUS, &st); | |
1418 | ||
1419 | if (data->kind == max6696) | |
1420 | lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2); | |
1421 | ||
1422 | *status = st | (st2 << 8); | |
1423 | ||
1424 | if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0) | |
1425 | return false; | |
1426 | ||
1427 | if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) || | |
1428 | (st2 & MAX6696_STATUS2_LOT2)) | |
1429 | dev_warn(&client->dev, | |
1430 | "temp%d out of range, please check!\n", 1); | |
1431 | if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) || | |
1432 | (st2 & MAX6696_STATUS2_ROT2)) | |
1433 | dev_warn(&client->dev, | |
1434 | "temp%d out of range, please check!\n", 2); | |
1435 | if (st & LM90_STATUS_ROPEN) | |
1436 | dev_warn(&client->dev, | |
1437 | "temp%d diode open, please check!\n", 2); | |
1438 | if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH | | |
1439 | MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2)) | |
1440 | dev_warn(&client->dev, | |
1441 | "temp%d out of range, please check!\n", 3); | |
1442 | if (st2 & MAX6696_STATUS2_R2OPEN) | |
1443 | dev_warn(&client->dev, | |
1444 | "temp%d diode open, please check!\n", 3); | |
1445 | ||
1446 | return true; | |
1447 | } | |
1448 | ||
109b1283 WN |
1449 | static irqreturn_t lm90_irq_thread(int irq, void *dev_id) |
1450 | { | |
1451 | struct i2c_client *client = dev_id; | |
1452 | u16 status; | |
1453 | ||
1454 | if (lm90_is_tripped(client, &status)) | |
1455 | return IRQ_HANDLED; | |
1456 | else | |
1457 | return IRQ_NONE; | |
1458 | } | |
1459 | ||
b2589ab0 | 1460 | static int lm90_probe(struct i2c_client *client, |
9b0e8526 JD |
1461 | const struct i2c_device_id *id) |
1462 | { | |
b2589ab0 JD |
1463 | struct device *dev = &client->dev; |
1464 | struct i2c_adapter *adapter = to_i2c_adapter(dev->parent); | |
9b0e8526 JD |
1465 | struct lm90_data *data; |
1466 | int err; | |
1da177e4 | 1467 | |
20f426ff GR |
1468 | data = devm_kzalloc(&client->dev, sizeof(struct lm90_data), GFP_KERNEL); |
1469 | if (!data) | |
1470 | return -ENOMEM; | |
1471 | ||
b2589ab0 | 1472 | i2c_set_clientdata(client, data); |
9a61bf63 | 1473 | mutex_init(&data->update_lock); |
1da177e4 | 1474 | |
9b0e8526 JD |
1475 | /* Set the device type */ |
1476 | data->kind = id->driver_data; | |
1477 | if (data->kind == adm1032) { | |
1478 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
b2589ab0 | 1479 | client->flags &= ~I2C_CLIENT_PEC; |
9b0e8526 | 1480 | } |
1da177e4 | 1481 | |
f36ffeab GR |
1482 | /* |
1483 | * Different devices have different alarm bits triggering the | |
1484 | * ALERT# output | |
1485 | */ | |
4667bcb8 | 1486 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1487 | |
88073bb1 | 1488 | /* Set chip capabilities */ |
4667bcb8 | 1489 | data->flags = lm90_params[data->kind].flags; |
a095f687 | 1490 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1491 | |
0c01b644 GR |
1492 | /* Set maximum conversion rate */ |
1493 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1494 | ||
1da177e4 | 1495 | /* Initialize the LM90 chip */ |
b2589ab0 | 1496 | lm90_init_client(client); |
1da177e4 LT |
1497 | |
1498 | /* Register sysfs hooks */ | |
b2589ab0 | 1499 | err = sysfs_create_group(&dev->kobj, &lm90_group); |
11e57812 | 1500 | if (err) |
f7001bb0 | 1501 | goto exit_restore; |
b2589ab0 JD |
1502 | if (client->flags & I2C_CLIENT_PEC) { |
1503 | err = device_create_file(dev, &dev_attr_pec); | |
11e57812 | 1504 | if (err) |
0e39e01c JD |
1505 | goto exit_remove_files; |
1506 | } | |
88073bb1 | 1507 | if (data->flags & LM90_HAVE_OFFSET) { |
b2589ab0 | 1508 | err = device_create_file(dev, |
11e57812 GR |
1509 | &sensor_dev_attr_temp2_offset.dev_attr); |
1510 | if (err) | |
69f2f96d JD |
1511 | goto exit_remove_files; |
1512 | } | |
6948708d | 1513 | if (data->flags & LM90_HAVE_EMERGENCY) { |
b2589ab0 | 1514 | err = sysfs_create_group(&dev->kobj, &lm90_emergency_group); |
6948708d GR |
1515 | if (err) |
1516 | goto exit_remove_files; | |
1517 | } | |
06e1c0a2 | 1518 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { |
b2589ab0 | 1519 | err = sysfs_create_group(&dev->kobj, |
06e1c0a2 GR |
1520 | &lm90_emergency_alarm_group); |
1521 | if (err) | |
1522 | goto exit_remove_files; | |
1523 | } | |
1524 | if (data->flags & LM90_HAVE_TEMP3) { | |
b2589ab0 | 1525 | err = sysfs_create_group(&dev->kobj, &lm90_temp3_group); |
06e1c0a2 GR |
1526 | if (err) |
1527 | goto exit_remove_files; | |
1528 | } | |
0e39e01c | 1529 | |
b2589ab0 | 1530 | data->hwmon_dev = hwmon_device_register(dev); |
1beeffe4 TJ |
1531 | if (IS_ERR(data->hwmon_dev)) { |
1532 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 1533 | goto exit_remove_files; |
943b0830 MH |
1534 | } |
1535 | ||
109b1283 WN |
1536 | if (client->irq) { |
1537 | dev_dbg(dev, "IRQ: %d\n", client->irq); | |
1538 | err = devm_request_threaded_irq(dev, client->irq, | |
1539 | NULL, lm90_irq_thread, | |
1540 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1541 | "lm90", client); | |
1542 | if (err < 0) { | |
1543 | dev_err(dev, "cannot request IRQ %d\n", client->irq); | |
1544 | goto exit_remove_files; | |
1545 | } | |
1546 | } | |
1547 | ||
1da177e4 LT |
1548 | return 0; |
1549 | ||
0e39e01c | 1550 | exit_remove_files: |
b2589ab0 | 1551 | lm90_remove_files(client, data); |
f7001bb0 GR |
1552 | exit_restore: |
1553 | lm90_restore_conf(client, data); | |
1da177e4 LT |
1554 | return err; |
1555 | } | |
1556 | ||
9b0e8526 | 1557 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 1558 | { |
943b0830 | 1559 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 1560 | |
1beeffe4 | 1561 | hwmon_device_unregister(data->hwmon_dev); |
b6fc1bac | 1562 | lm90_remove_files(client, data); |
f7001bb0 | 1563 | lm90_restore_conf(client, data); |
95238364 | 1564 | |
1da177e4 LT |
1565 | return 0; |
1566 | } | |
1567 | ||
53de3342 JD |
1568 | static void lm90_alert(struct i2c_client *client, unsigned int flag) |
1569 | { | |
072de496 | 1570 | u16 alarms; |
06e1c0a2 | 1571 | |
072de496 | 1572 | if (lm90_is_tripped(client, &alarms)) { |
f36ffeab GR |
1573 | /* |
1574 | * Disable ALERT# output, because these chips don't implement | |
1575 | * SMBus alert correctly; they should only hold the alert line | |
1576 | * low briefly. | |
1577 | */ | |
072de496 WN |
1578 | struct lm90_data *data = i2c_get_clientdata(client); |
1579 | ||
1179324c | 1580 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) |
53de3342 | 1581 | && (alarms & data->alert_alarms)) { |
072de496 | 1582 | u8 config; |
53de3342 JD |
1583 | dev_dbg(&client->dev, "Disabling ALERT#\n"); |
1584 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
1585 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1586 | config | 0x80); | |
1587 | } | |
072de496 WN |
1588 | } else { |
1589 | dev_info(&client->dev, "Everything OK\n"); | |
53de3342 JD |
1590 | } |
1591 | } | |
1592 | ||
15b66ab6 GR |
1593 | static struct i2c_driver lm90_driver = { |
1594 | .class = I2C_CLASS_HWMON, | |
1595 | .driver = { | |
1596 | .name = "lm90", | |
1597 | }, | |
1598 | .probe = lm90_probe, | |
1599 | .remove = lm90_remove, | |
1600 | .alert = lm90_alert, | |
1601 | .id_table = lm90_id, | |
1602 | .detect = lm90_detect, | |
1603 | .address_list = normal_i2c, | |
1604 | }; | |
1da177e4 | 1605 | |
f0967eea | 1606 | module_i2c_driver(lm90_driver); |
1da177e4 LT |
1607 | |
1608 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
1609 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); | |
1610 | MODULE_LICENSE("GPL"); |