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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 | * | |
1da177e4 LT |
60 | * Since the LM90 was the first chipset supported by this driver, most |
61 | * comments will refer to this chipset, but are actually general and | |
62 | * concern all supported chipsets, unless mentioned otherwise. | |
63 | * | |
64 | * This program is free software; you can redistribute it and/or modify | |
65 | * it under the terms of the GNU General Public License as published by | |
66 | * the Free Software Foundation; either version 2 of the License, or | |
67 | * (at your option) any later version. | |
68 | * | |
69 | * This program is distributed in the hope that it will be useful, | |
70 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
71 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
72 | * GNU General Public License for more details. | |
73 | * | |
74 | * You should have received a copy of the GNU General Public License | |
75 | * along with this program; if not, write to the Free Software | |
76 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
77 | */ | |
78 | ||
1da177e4 LT |
79 | #include <linux/module.h> |
80 | #include <linux/init.h> | |
81 | #include <linux/slab.h> | |
82 | #include <linux/jiffies.h> | |
83 | #include <linux/i2c.h> | |
10c08f81 | 84 | #include <linux/hwmon-sysfs.h> |
943b0830 MH |
85 | #include <linux/hwmon.h> |
86 | #include <linux/err.h> | |
9a61bf63 | 87 | #include <linux/mutex.h> |
0e39e01c | 88 | #include <linux/sysfs.h> |
1da177e4 LT |
89 | |
90 | /* | |
91 | * Addresses to scan | |
92 | * Address is fully defined internally and cannot be changed except for | |
32c82a93 | 93 | * MAX6659, MAX6680 and MAX6681. |
5a4e5e6a GR |
94 | * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649, |
95 | * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c. | |
96 | * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D | |
97 | * have address 0x4d. | |
271dabf5 | 98 | * MAX6647 has address 0x4e. |
13c84951 | 99 | * MAX6659 can have address 0x4c, 0x4d or 0x4e. |
32c82a93 RB |
100 | * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, |
101 | * 0x4c, 0x4d or 0x4e. | |
2ef01793 | 102 | * SA56004 can have address 0x48 through 0x4F. |
1da177e4 LT |
103 | */ |
104 | ||
25e9c86d | 105 | static const unsigned short normal_i2c[] = { |
2ef01793 SD |
106 | 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, |
107 | 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; | |
1da177e4 | 108 | |
13c84951 | 109 | enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, |
2ef01793 | 110 | max6646, w83l771, max6696, sa56004 }; |
1da177e4 LT |
111 | |
112 | /* | |
113 | * The LM90 registers | |
114 | */ | |
115 | ||
116 | #define LM90_REG_R_MAN_ID 0xFE | |
117 | #define LM90_REG_R_CHIP_ID 0xFF | |
118 | #define LM90_REG_R_CONFIG1 0x03 | |
119 | #define LM90_REG_W_CONFIG1 0x09 | |
120 | #define LM90_REG_R_CONFIG2 0xBF | |
121 | #define LM90_REG_W_CONFIG2 0xBF | |
122 | #define LM90_REG_R_CONVRATE 0x04 | |
123 | #define LM90_REG_W_CONVRATE 0x0A | |
124 | #define LM90_REG_R_STATUS 0x02 | |
125 | #define LM90_REG_R_LOCAL_TEMP 0x00 | |
126 | #define LM90_REG_R_LOCAL_HIGH 0x05 | |
127 | #define LM90_REG_W_LOCAL_HIGH 0x0B | |
128 | #define LM90_REG_R_LOCAL_LOW 0x06 | |
129 | #define LM90_REG_W_LOCAL_LOW 0x0C | |
130 | #define LM90_REG_R_LOCAL_CRIT 0x20 | |
131 | #define LM90_REG_W_LOCAL_CRIT 0x20 | |
132 | #define LM90_REG_R_REMOTE_TEMPH 0x01 | |
133 | #define LM90_REG_R_REMOTE_TEMPL 0x10 | |
134 | #define LM90_REG_R_REMOTE_OFFSH 0x11 | |
135 | #define LM90_REG_W_REMOTE_OFFSH 0x11 | |
136 | #define LM90_REG_R_REMOTE_OFFSL 0x12 | |
137 | #define LM90_REG_W_REMOTE_OFFSL 0x12 | |
138 | #define LM90_REG_R_REMOTE_HIGHH 0x07 | |
139 | #define LM90_REG_W_REMOTE_HIGHH 0x0D | |
140 | #define LM90_REG_R_REMOTE_HIGHL 0x13 | |
141 | #define LM90_REG_W_REMOTE_HIGHL 0x13 | |
142 | #define LM90_REG_R_REMOTE_LOWH 0x08 | |
143 | #define LM90_REG_W_REMOTE_LOWH 0x0E | |
144 | #define LM90_REG_R_REMOTE_LOWL 0x14 | |
145 | #define LM90_REG_W_REMOTE_LOWL 0x14 | |
146 | #define LM90_REG_R_REMOTE_CRIT 0x19 | |
147 | #define LM90_REG_W_REMOTE_CRIT 0x19 | |
148 | #define LM90_REG_R_TCRIT_HYST 0x21 | |
149 | #define LM90_REG_W_TCRIT_HYST 0x21 | |
150 | ||
06e1c0a2 | 151 | /* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */ |
f65e1708 JD |
152 | |
153 | #define MAX6657_REG_R_LOCAL_TEMPL 0x11 | |
06e1c0a2 | 154 | #define MAX6696_REG_R_STATUS2 0x12 |
6948708d GR |
155 | #define MAX6659_REG_R_REMOTE_EMERG 0x16 |
156 | #define MAX6659_REG_W_REMOTE_EMERG 0x16 | |
157 | #define MAX6659_REG_R_LOCAL_EMERG 0x17 | |
158 | #define MAX6659_REG_W_LOCAL_EMERG 0x17 | |
f65e1708 | 159 | |
2ef01793 SD |
160 | /* SA56004 registers */ |
161 | ||
162 | #define SA56004_REG_R_LOCAL_TEMPL 0x22 | |
163 | ||
0c01b644 GR |
164 | #define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */ |
165 | #define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */ | |
166 | ||
23b2d477 NC |
167 | /* |
168 | * Device flags | |
169 | */ | |
88073bb1 GR |
170 | #define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */ |
171 | /* Device features */ | |
172 | #define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */ | |
88073bb1 | 173 | #define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */ |
6948708d | 174 | #define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */ |
06e1c0a2 GR |
175 | #define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */ |
176 | #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */ | |
1179324c | 177 | #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */ |
23b2d477 | 178 | |
1da177e4 LT |
179 | /* |
180 | * Driver data (common to all clients) | |
181 | */ | |
182 | ||
9b0e8526 JD |
183 | static const struct i2c_device_id lm90_id[] = { |
184 | { "adm1032", adm1032 }, | |
185 | { "adt7461", adt7461 }, | |
5a4e5e6a | 186 | { "adt7461a", adt7461 }, |
9b0e8526 JD |
187 | { "lm90", lm90 }, |
188 | { "lm86", lm86 }, | |
97ae60bb JD |
189 | { "lm89", lm86 }, |
190 | { "lm99", lm99 }, | |
271dabf5 BH |
191 | { "max6646", max6646 }, |
192 | { "max6647", max6646 }, | |
193 | { "max6649", max6646 }, | |
9b0e8526 JD |
194 | { "max6657", max6657 }, |
195 | { "max6658", max6657 }, | |
13c84951 | 196 | { "max6659", max6659 }, |
9b0e8526 JD |
197 | { "max6680", max6680 }, |
198 | { "max6681", max6680 }, | |
06e1c0a2 GR |
199 | { "max6695", max6696 }, |
200 | { "max6696", max6696 }, | |
5a4e5e6a | 201 | { "nct1008", adt7461 }, |
6771ea1f | 202 | { "w83l771", w83l771 }, |
2ef01793 | 203 | { "sa56004", sa56004 }, |
9b0e8526 JD |
204 | { } |
205 | }; | |
206 | MODULE_DEVICE_TABLE(i2c, lm90_id); | |
207 | ||
4667bcb8 GR |
208 | /* |
209 | * chip type specific parameters | |
210 | */ | |
211 | struct lm90_params { | |
212 | u32 flags; /* Capabilities */ | |
213 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ | |
214 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 215 | u8 max_convrate; /* Maximum conversion rate register value */ |
a095f687 | 216 | u8 reg_local_ext; /* Extended local temp register (optional) */ |
4667bcb8 GR |
217 | }; |
218 | ||
219 | static const struct lm90_params lm90_params[] = { | |
220 | [adm1032] = { | |
1179324c GR |
221 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
222 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 223 | .alert_alarms = 0x7c, |
0c01b644 | 224 | .max_convrate = 10, |
4667bcb8 GR |
225 | }, |
226 | [adt7461] = { | |
1179324c GR |
227 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT |
228 | | LM90_HAVE_BROKEN_ALERT, | |
4667bcb8 | 229 | .alert_alarms = 0x7c, |
0c01b644 | 230 | .max_convrate = 10, |
4667bcb8 GR |
231 | }, |
232 | [lm86] = { | |
233 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
234 | .alert_alarms = 0x7b, | |
0c01b644 | 235 | .max_convrate = 9, |
4667bcb8 GR |
236 | }, |
237 | [lm90] = { | |
238 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
239 | .alert_alarms = 0x7b, | |
0c01b644 | 240 | .max_convrate = 9, |
4667bcb8 GR |
241 | }, |
242 | [lm99] = { | |
243 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
244 | .alert_alarms = 0x7b, | |
0c01b644 | 245 | .max_convrate = 9, |
4667bcb8 GR |
246 | }, |
247 | [max6646] = { | |
4667bcb8 | 248 | .alert_alarms = 0x7c, |
0c01b644 | 249 | .max_convrate = 6, |
2ef01793 | 250 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
251 | }, |
252 | [max6657] = { | |
4667bcb8 | 253 | .alert_alarms = 0x7c, |
0c01b644 | 254 | .max_convrate = 8, |
2ef01793 | 255 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
256 | }, |
257 | [max6659] = { | |
a095f687 | 258 | .flags = LM90_HAVE_EMERGENCY, |
4667bcb8 | 259 | .alert_alarms = 0x7c, |
0c01b644 | 260 | .max_convrate = 8, |
2ef01793 | 261 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
262 | }, |
263 | [max6680] = { | |
264 | .flags = LM90_HAVE_OFFSET, | |
265 | .alert_alarms = 0x7c, | |
0c01b644 | 266 | .max_convrate = 7, |
4667bcb8 GR |
267 | }, |
268 | [max6696] = { | |
a095f687 | 269 | .flags = LM90_HAVE_EMERGENCY |
4667bcb8 GR |
270 | | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3, |
271 | .alert_alarms = 0x187c, | |
0c01b644 | 272 | .max_convrate = 6, |
2ef01793 | 273 | .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL, |
4667bcb8 GR |
274 | }, |
275 | [w83l771] = { | |
276 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, | |
277 | .alert_alarms = 0x7c, | |
0c01b644 | 278 | .max_convrate = 8, |
4667bcb8 | 279 | }, |
2ef01793 | 280 | [sa56004] = { |
a095f687 | 281 | .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT, |
2ef01793 SD |
282 | .alert_alarms = 0x7b, |
283 | .max_convrate = 9, | |
284 | .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL, | |
285 | }, | |
4667bcb8 GR |
286 | }; |
287 | ||
1da177e4 LT |
288 | /* |
289 | * Client data (each client gets its own) | |
290 | */ | |
291 | ||
292 | struct lm90_data { | |
1beeffe4 | 293 | struct device *hwmon_dev; |
9a61bf63 | 294 | struct mutex update_lock; |
1da177e4 LT |
295 | char valid; /* zero until following fields are valid */ |
296 | unsigned long last_updated; /* in jiffies */ | |
297 | int kind; | |
4667bcb8 | 298 | u32 flags; |
1da177e4 | 299 | |
0c01b644 GR |
300 | int update_interval; /* in milliseconds */ |
301 | ||
95238364 | 302 | u8 config_orig; /* Original configuration register value */ |
0c01b644 | 303 | u8 convrate_orig; /* Original conversion rate register value */ |
06e1c0a2 GR |
304 | u16 alert_alarms; /* Which alarm bits trigger ALERT# */ |
305 | /* Upper 8 bits for max6695/96 */ | |
0c01b644 | 306 | u8 max_convrate; /* Maximum conversion rate */ |
2ef01793 | 307 | u8 reg_local_ext; /* local extension register offset */ |
95238364 | 308 | |
1da177e4 | 309 | /* registers values */ |
06e1c0a2 | 310 | s8 temp8[8]; /* 0: local low limit |
f65e1708 JD |
311 | 1: local high limit |
312 | 2: local critical limit | |
6948708d | 313 | 3: remote critical limit |
06e1c0a2 GR |
314 | 4: local emergency limit (max6659 and max6695/96) |
315 | 5: remote emergency limit (max6659 and max6695/96) | |
316 | 6: remote 2 critical limit (max6695/96 only) | |
317 | 7: remote 2 emergency limit (max6695/96 only) */ | |
318 | s16 temp11[8]; /* 0: remote input | |
30d7394b | 319 | 1: remote low limit |
69f2f96d | 320 | 2: remote high limit |
06e1c0a2 GR |
321 | 3: remote offset (except max6646, max6657/58/59, |
322 | and max6695/96) | |
323 | 4: local input | |
324 | 5: remote 2 input (max6695/96 only) | |
325 | 6: remote 2 low limit (max6695/96 only) | |
326 | 7: remote 2 high limit (ma6695/96 only) */ | |
1da177e4 | 327 | u8 temp_hyst; |
06e1c0a2 | 328 | u16 alarms; /* bitvector (upper 8 bits for max6695/96) */ |
1da177e4 LT |
329 | }; |
330 | ||
15b66ab6 GR |
331 | /* |
332 | * Support functions | |
333 | */ | |
334 | ||
335 | /* | |
336 | * The ADM1032 supports PEC but not on write byte transactions, so we need | |
337 | * to explicitly ask for a transaction without PEC. | |
338 | */ | |
339 | static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value) | |
340 | { | |
341 | return i2c_smbus_xfer(client->adapter, client->addr, | |
342 | client->flags & ~I2C_CLIENT_PEC, | |
343 | I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); | |
344 | } | |
345 | ||
346 | /* | |
347 | * It is assumed that client->update_lock is held (unless we are in | |
348 | * detection or initialization steps). This matters when PEC is enabled, | |
349 | * because we don't want the address pointer to change between the write | |
350 | * byte and the read byte transactions. | |
351 | */ | |
352 | static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value) | |
353 | { | |
354 | int err; | |
355 | ||
356 | if (client->flags & I2C_CLIENT_PEC) { | |
357 | err = adm1032_write_byte(client, reg); | |
358 | if (err >= 0) | |
359 | err = i2c_smbus_read_byte(client); | |
360 | } else | |
361 | err = i2c_smbus_read_byte_data(client, reg); | |
362 | ||
363 | if (err < 0) { | |
364 | dev_warn(&client->dev, "Register %#02x read failed (%d)\n", | |
365 | reg, err); | |
366 | return err; | |
367 | } | |
368 | *value = err; | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value) | |
374 | { | |
375 | int err; | |
376 | u8 oldh, newh, l; | |
377 | ||
378 | /* | |
379 | * There is a trick here. We have to read two registers to have the | |
380 | * sensor temperature, but we have to beware a conversion could occur | |
25985edc | 381 | * between the readings. The datasheet says we should either use |
15b66ab6 GR |
382 | * the one-shot conversion register, which we don't want to do |
383 | * (disables hardware monitoring) or monitor the busy bit, which is | |
384 | * impossible (we can't read the values and monitor that bit at the | |
385 | * exact same time). So the solution used here is to read the high | |
386 | * byte once, then the low byte, then the high byte again. If the new | |
387 | * high byte matches the old one, then we have a valid reading. Else | |
388 | * we have to read the low byte again, and now we believe we have a | |
389 | * correct reading. | |
390 | */ | |
391 | if ((err = lm90_read_reg(client, regh, &oldh)) | |
392 | || (err = lm90_read_reg(client, regl, &l)) | |
393 | || (err = lm90_read_reg(client, regh, &newh))) | |
394 | return err; | |
395 | if (oldh != newh) { | |
396 | err = lm90_read_reg(client, regl, &l); | |
397 | if (err) | |
398 | return err; | |
399 | } | |
400 | *value = (newh << 8) | l; | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | /* | |
406 | * client->update_lock must be held when calling this function (unless we are | |
407 | * in detection or initialization steps), and while a remote channel other | |
408 | * than channel 0 is selected. Also, calling code must make sure to re-select | |
409 | * external channel 0 before releasing the lock. This is necessary because | |
410 | * various registers have different meanings as a result of selecting a | |
411 | * non-default remote channel. | |
412 | */ | |
413 | static inline void lm90_select_remote_channel(struct i2c_client *client, | |
414 | struct lm90_data *data, | |
415 | int channel) | |
416 | { | |
417 | u8 config; | |
418 | ||
419 | if (data->kind == max6696) { | |
420 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
421 | config &= ~0x08; | |
422 | if (channel) | |
423 | config |= 0x08; | |
424 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
425 | config); | |
426 | } | |
427 | } | |
428 | ||
0c01b644 GR |
429 | /* |
430 | * Set conversion rate. | |
431 | * client->update_lock must be held when calling this function (unless we are | |
432 | * in detection or initialization steps). | |
433 | */ | |
434 | static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data, | |
435 | unsigned int interval) | |
436 | { | |
437 | int i; | |
438 | unsigned int update_interval; | |
439 | ||
440 | /* Shift calculations to avoid rounding errors */ | |
441 | interval <<= 6; | |
442 | ||
443 | /* find the nearest update rate */ | |
444 | for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6; | |
445 | i < data->max_convrate; i++, update_interval >>= 1) | |
446 | if (interval >= update_interval * 3 / 4) | |
447 | break; | |
448 | ||
449 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i); | |
450 | data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64); | |
451 | } | |
452 | ||
15b66ab6 GR |
453 | static struct lm90_data *lm90_update_device(struct device *dev) |
454 | { | |
455 | struct i2c_client *client = to_i2c_client(dev); | |
456 | struct lm90_data *data = i2c_get_clientdata(client); | |
0c01b644 | 457 | unsigned long next_update; |
15b66ab6 GR |
458 | |
459 | mutex_lock(&data->update_lock); | |
460 | ||
0c01b644 GR |
461 | next_update = data->last_updated |
462 | + msecs_to_jiffies(data->update_interval) + 1; | |
463 | if (time_after(jiffies, next_update) || !data->valid) { | |
15b66ab6 GR |
464 | u8 h, l; |
465 | u8 alarms; | |
466 | ||
467 | dev_dbg(&client->dev, "Updating lm90 data.\n"); | |
468 | lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]); | |
469 | lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]); | |
470 | lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]); | |
471 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]); | |
472 | lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst); | |
473 | ||
a095f687 | 474 | if (data->reg_local_ext) { |
15b66ab6 | 475 | lm90_read16(client, LM90_REG_R_LOCAL_TEMP, |
2ef01793 | 476 | data->reg_local_ext, |
15b66ab6 GR |
477 | &data->temp11[4]); |
478 | } else { | |
479 | if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP, | |
480 | &h) == 0) | |
481 | data->temp11[4] = h << 8; | |
482 | } | |
483 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
484 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]); | |
485 | ||
486 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) { | |
487 | data->temp11[1] = h << 8; | |
488 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) | |
489 | && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL, | |
490 | &l) == 0) | |
491 | data->temp11[1] |= l; | |
492 | } | |
493 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) { | |
494 | data->temp11[2] = h << 8; | |
495 | if ((data->flags & LM90_HAVE_REM_LIMIT_EXT) | |
496 | && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, | |
497 | &l) == 0) | |
498 | data->temp11[2] |= l; | |
499 | } | |
500 | ||
501 | if (data->flags & LM90_HAVE_OFFSET) { | |
502 | if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, | |
503 | &h) == 0 | |
504 | && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, | |
505 | &l) == 0) | |
506 | data->temp11[3] = (h << 8) | l; | |
507 | } | |
508 | if (data->flags & LM90_HAVE_EMERGENCY) { | |
509 | lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG, | |
510 | &data->temp8[4]); | |
511 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, | |
512 | &data->temp8[5]); | |
513 | } | |
514 | lm90_read_reg(client, LM90_REG_R_STATUS, &alarms); | |
515 | data->alarms = alarms; /* save as 16 bit value */ | |
516 | ||
517 | if (data->kind == max6696) { | |
518 | lm90_select_remote_channel(client, data, 1); | |
519 | lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, | |
520 | &data->temp8[6]); | |
521 | lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG, | |
522 | &data->temp8[7]); | |
523 | lm90_read16(client, LM90_REG_R_REMOTE_TEMPH, | |
524 | LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]); | |
525 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h)) | |
526 | data->temp11[6] = h << 8; | |
527 | if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h)) | |
528 | data->temp11[7] = h << 8; | |
529 | lm90_select_remote_channel(client, data, 0); | |
530 | ||
531 | if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2, | |
532 | &alarms)) | |
533 | data->alarms |= alarms << 8; | |
534 | } | |
535 | ||
536 | /* Re-enable ALERT# output if it was originally enabled and | |
537 | * relevant alarms are all clear */ | |
538 | if ((data->config_orig & 0x80) == 0 | |
539 | && (data->alarms & data->alert_alarms) == 0) { | |
540 | u8 config; | |
541 | ||
542 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
543 | if (config & 0x80) { | |
544 | dev_dbg(&client->dev, "Re-enabling ALERT#\n"); | |
545 | i2c_smbus_write_byte_data(client, | |
546 | LM90_REG_W_CONFIG1, | |
547 | config & ~0x80); | |
548 | } | |
549 | } | |
550 | ||
551 | data->last_updated = jiffies; | |
552 | data->valid = 1; | |
553 | } | |
554 | ||
555 | mutex_unlock(&data->update_lock); | |
556 | ||
557 | return data; | |
558 | } | |
559 | ||
cea50fe2 NC |
560 | /* |
561 | * Conversions | |
562 | * For local temperatures and limits, critical limits and the hysteresis | |
563 | * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius. | |
564 | * For remote temperatures and limits, it uses signed 11-bit values with | |
271dabf5 BH |
565 | * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some |
566 | * Maxim chips use unsigned values. | |
cea50fe2 NC |
567 | */ |
568 | ||
9d4d3834 | 569 | static inline int temp_from_s8(s8 val) |
cea50fe2 NC |
570 | { |
571 | return val * 1000; | |
572 | } | |
573 | ||
271dabf5 BH |
574 | static inline int temp_from_u8(u8 val) |
575 | { | |
576 | return val * 1000; | |
577 | } | |
578 | ||
9d4d3834 | 579 | static inline int temp_from_s16(s16 val) |
cea50fe2 NC |
580 | { |
581 | return val / 32 * 125; | |
582 | } | |
583 | ||
271dabf5 BH |
584 | static inline int temp_from_u16(u16 val) |
585 | { | |
586 | return val / 32 * 125; | |
587 | } | |
588 | ||
9d4d3834 | 589 | static s8 temp_to_s8(long val) |
cea50fe2 NC |
590 | { |
591 | if (val <= -128000) | |
592 | return -128; | |
593 | if (val >= 127000) | |
594 | return 127; | |
595 | if (val < 0) | |
596 | return (val - 500) / 1000; | |
597 | return (val + 500) / 1000; | |
598 | } | |
599 | ||
271dabf5 BH |
600 | static u8 temp_to_u8(long val) |
601 | { | |
602 | if (val <= 0) | |
603 | return 0; | |
604 | if (val >= 255000) | |
605 | return 255; | |
606 | return (val + 500) / 1000; | |
607 | } | |
608 | ||
9d4d3834 | 609 | static s16 temp_to_s16(long val) |
cea50fe2 NC |
610 | { |
611 | if (val <= -128000) | |
612 | return 0x8000; | |
613 | if (val >= 127875) | |
614 | return 0x7FE0; | |
615 | if (val < 0) | |
616 | return (val - 62) / 125 * 32; | |
617 | return (val + 62) / 125 * 32; | |
618 | } | |
619 | ||
620 | static u8 hyst_to_reg(long val) | |
621 | { | |
622 | if (val <= 0) | |
623 | return 0; | |
624 | if (val >= 30500) | |
625 | return 31; | |
626 | return (val + 500) / 1000; | |
627 | } | |
628 | ||
629 | /* | |
23b2d477 NC |
630 | * ADT7461 in compatibility mode is almost identical to LM90 except that |
631 | * attempts to write values that are outside the range 0 < temp < 127 are | |
632 | * treated as the boundary value. | |
633 | * | |
634 | * ADT7461 in "extended mode" operation uses unsigned integers offset by | |
635 | * 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC. | |
cea50fe2 | 636 | */ |
9d4d3834 | 637 | static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val) |
cea50fe2 | 638 | { |
23b2d477 NC |
639 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
640 | return (val - 64) * 1000; | |
641 | else | |
9d4d3834 | 642 | return temp_from_s8(val); |
cea50fe2 NC |
643 | } |
644 | ||
9d4d3834 | 645 | static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val) |
cea50fe2 | 646 | { |
23b2d477 NC |
647 | if (data->flags & LM90_FLAG_ADT7461_EXT) |
648 | return (val - 0x4000) / 64 * 250; | |
649 | else | |
9d4d3834 | 650 | return temp_from_s16(val); |
23b2d477 NC |
651 | } |
652 | ||
9d4d3834 | 653 | static u8 temp_to_u8_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
654 | { |
655 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
656 | if (val <= -64000) | |
657 | return 0; | |
658 | if (val >= 191000) | |
659 | return 0xFF; | |
660 | return (val + 500 + 64000) / 1000; | |
661 | } else { | |
662 | if (val <= 0) | |
663 | return 0; | |
664 | if (val >= 127000) | |
665 | return 127; | |
666 | return (val + 500) / 1000; | |
667 | } | |
668 | } | |
669 | ||
9d4d3834 | 670 | static u16 temp_to_u16_adt7461(struct lm90_data *data, long val) |
23b2d477 NC |
671 | { |
672 | if (data->flags & LM90_FLAG_ADT7461_EXT) { | |
673 | if (val <= -64000) | |
674 | return 0; | |
675 | if (val >= 191750) | |
676 | return 0xFFC0; | |
677 | return (val + 64000 + 125) / 250 * 64; | |
678 | } else { | |
679 | if (val <= 0) | |
680 | return 0; | |
681 | if (val >= 127750) | |
682 | return 0x7FC0; | |
683 | return (val + 125) / 250 * 64; | |
684 | } | |
cea50fe2 NC |
685 | } |
686 | ||
1da177e4 LT |
687 | /* |
688 | * Sysfs stuff | |
689 | */ | |
690 | ||
30d7394b JD |
691 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
692 | char *buf) | |
693 | { | |
694 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
695 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
696 | int temp; |
697 | ||
698 | if (data->kind == adt7461) | |
9d4d3834 | 699 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
271dabf5 BH |
700 | else if (data->kind == max6646) |
701 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 702 | else |
9d4d3834 | 703 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 704 | |
97ae60bb JD |
705 | /* +16 degrees offset for temp2 for the LM99 */ |
706 | if (data->kind == lm99 && attr->index == 3) | |
707 | temp += 16000; | |
708 | ||
23b2d477 | 709 | return sprintf(buf, "%d\n", temp); |
30d7394b JD |
710 | } |
711 | ||
712 | static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, | |
713 | const char *buf, size_t count) | |
714 | { | |
06e1c0a2 | 715 | static const u8 reg[8] = { |
30d7394b JD |
716 | LM90_REG_W_LOCAL_LOW, |
717 | LM90_REG_W_LOCAL_HIGH, | |
718 | LM90_REG_W_LOCAL_CRIT, | |
719 | LM90_REG_W_REMOTE_CRIT, | |
6948708d GR |
720 | MAX6659_REG_W_LOCAL_EMERG, |
721 | MAX6659_REG_W_REMOTE_EMERG, | |
06e1c0a2 GR |
722 | LM90_REG_W_REMOTE_CRIT, |
723 | MAX6659_REG_W_REMOTE_EMERG, | |
30d7394b JD |
724 | }; |
725 | ||
726 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
727 | struct i2c_client *client = to_i2c_client(dev); | |
728 | struct lm90_data *data = i2c_get_clientdata(client); | |
30d7394b | 729 | int nr = attr->index; |
11e57812 GR |
730 | long val; |
731 | int err; | |
732 | ||
733 | err = strict_strtol(buf, 10, &val); | |
734 | if (err < 0) | |
735 | return err; | |
30d7394b | 736 | |
97ae60bb JD |
737 | /* +16 degrees offset for temp2 for the LM99 */ |
738 | if (data->kind == lm99 && attr->index == 3) | |
739 | val -= 16000; | |
740 | ||
9a61bf63 | 741 | mutex_lock(&data->update_lock); |
30d7394b | 742 | if (data->kind == adt7461) |
9d4d3834 | 743 | data->temp8[nr] = temp_to_u8_adt7461(data, val); |
271dabf5 BH |
744 | else if (data->kind == max6646) |
745 | data->temp8[nr] = temp_to_u8(val); | |
30d7394b | 746 | else |
9d4d3834 | 747 | data->temp8[nr] = temp_to_s8(val); |
06e1c0a2 GR |
748 | |
749 | lm90_select_remote_channel(client, data, nr >= 6); | |
f65e1708 | 750 | i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]); |
06e1c0a2 GR |
751 | lm90_select_remote_channel(client, data, 0); |
752 | ||
9a61bf63 | 753 | mutex_unlock(&data->update_lock); |
30d7394b | 754 | return count; |
1da177e4 | 755 | } |
30d7394b JD |
756 | |
757 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
758 | char *buf) | |
759 | { | |
96512861 | 760 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b | 761 | struct lm90_data *data = lm90_update_device(dev); |
23b2d477 NC |
762 | int temp; |
763 | ||
764 | if (data->kind == adt7461) | |
9d4d3834 | 765 | temp = temp_from_u16_adt7461(data, data->temp11[attr->index]); |
271dabf5 BH |
766 | else if (data->kind == max6646) |
767 | temp = temp_from_u16(data->temp11[attr->index]); | |
23b2d477 | 768 | else |
9d4d3834 | 769 | temp = temp_from_s16(data->temp11[attr->index]); |
23b2d477 | 770 | |
97ae60bb JD |
771 | /* +16 degrees offset for temp2 for the LM99 */ |
772 | if (data->kind == lm99 && attr->index <= 2) | |
773 | temp += 16000; | |
774 | ||
23b2d477 | 775 | return sprintf(buf, "%d\n", temp); |
1da177e4 | 776 | } |
30d7394b JD |
777 | |
778 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
779 | const char *buf, size_t count) | |
780 | { | |
96512861 GR |
781 | struct { |
782 | u8 high; | |
783 | u8 low; | |
06e1c0a2 GR |
784 | int channel; |
785 | } reg[5] = { | |
786 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 }, | |
787 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 }, | |
788 | { LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 }, | |
789 | { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 }, | |
790 | { LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 } | |
30d7394b JD |
791 | }; |
792 | ||
96512861 | 793 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
30d7394b JD |
794 | struct i2c_client *client = to_i2c_client(dev); |
795 | struct lm90_data *data = i2c_get_clientdata(client); | |
96512861 GR |
796 | int nr = attr->nr; |
797 | int index = attr->index; | |
11e57812 GR |
798 | long val; |
799 | int err; | |
800 | ||
801 | err = strict_strtol(buf, 10, &val); | |
802 | if (err < 0) | |
803 | return err; | |
30d7394b | 804 | |
97ae60bb | 805 | /* +16 degrees offset for temp2 for the LM99 */ |
96512861 | 806 | if (data->kind == lm99 && index <= 2) |
97ae60bb JD |
807 | val -= 16000; |
808 | ||
9a61bf63 | 809 | mutex_lock(&data->update_lock); |
30d7394b | 810 | if (data->kind == adt7461) |
96512861 | 811 | data->temp11[index] = temp_to_u16_adt7461(data, val); |
271dabf5 | 812 | else if (data->kind == max6646) |
96512861 | 813 | data->temp11[index] = temp_to_u8(val) << 8; |
88073bb1 | 814 | else if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 | 815 | data->temp11[index] = temp_to_s16(val); |
88073bb1 | 816 | else |
96512861 | 817 | data->temp11[index] = temp_to_s8(val) << 8; |
5f502a83 | 818 | |
06e1c0a2 | 819 | lm90_select_remote_channel(client, data, reg[nr].channel); |
96512861 GR |
820 | i2c_smbus_write_byte_data(client, reg[nr].high, |
821 | data->temp11[index] >> 8); | |
88073bb1 | 822 | if (data->flags & LM90_HAVE_REM_LIMIT_EXT) |
96512861 GR |
823 | i2c_smbus_write_byte_data(client, reg[nr].low, |
824 | data->temp11[index] & 0xff); | |
06e1c0a2 GR |
825 | lm90_select_remote_channel(client, data, 0); |
826 | ||
9a61bf63 | 827 | mutex_unlock(&data->update_lock); |
30d7394b | 828 | return count; |
1da177e4 | 829 | } |
30d7394b | 830 | |
11e57812 GR |
831 | static ssize_t show_temphyst(struct device *dev, |
832 | struct device_attribute *devattr, | |
30d7394b JD |
833 | char *buf) |
834 | { | |
835 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
836 | struct lm90_data *data = lm90_update_device(dev); | |
23b2d477 NC |
837 | int temp; |
838 | ||
839 | if (data->kind == adt7461) | |
9d4d3834 | 840 | temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); |
ec38fa2b JD |
841 | else if (data->kind == max6646) |
842 | temp = temp_from_u8(data->temp8[attr->index]); | |
23b2d477 | 843 | else |
9d4d3834 | 844 | temp = temp_from_s8(data->temp8[attr->index]); |
23b2d477 | 845 | |
97ae60bb JD |
846 | /* +16 degrees offset for temp2 for the LM99 */ |
847 | if (data->kind == lm99 && attr->index == 3) | |
848 | temp += 16000; | |
849 | ||
9d4d3834 | 850 | return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); |
1da177e4 | 851 | } |
1da177e4 | 852 | |
30d7394b JD |
853 | static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, |
854 | const char *buf, size_t count) | |
1da177e4 LT |
855 | { |
856 | struct i2c_client *client = to_i2c_client(dev); | |
857 | struct lm90_data *data = i2c_get_clientdata(client); | |
11e57812 GR |
858 | long val; |
859 | int err; | |
ec38fa2b | 860 | int temp; |
1da177e4 | 861 | |
11e57812 GR |
862 | err = strict_strtol(buf, 10, &val); |
863 | if (err < 0) | |
864 | return err; | |
865 | ||
9a61bf63 | 866 | mutex_lock(&data->update_lock); |
ec38fa2b JD |
867 | if (data->kind == adt7461) |
868 | temp = temp_from_u8_adt7461(data, data->temp8[2]); | |
869 | else if (data->kind == max6646) | |
870 | temp = temp_from_u8(data->temp8[2]); | |
871 | else | |
872 | temp = temp_from_s8(data->temp8[2]); | |
873 | ||
874 | data->temp_hyst = hyst_to_reg(temp - val); | |
1da177e4 | 875 | i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, |
ec38fa2b | 876 | data->temp_hyst); |
9a61bf63 | 877 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
878 | return count; |
879 | } | |
880 | ||
30d7394b JD |
881 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
882 | char *buf) | |
1da177e4 LT |
883 | { |
884 | struct lm90_data *data = lm90_update_device(dev); | |
885 | return sprintf(buf, "%d\n", data->alarms); | |
886 | } | |
887 | ||
2d45771e JD |
888 | static ssize_t show_alarm(struct device *dev, struct device_attribute |
889 | *devattr, char *buf) | |
890 | { | |
891 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
892 | struct lm90_data *data = lm90_update_device(dev); | |
893 | int bitnr = attr->index; | |
894 | ||
895 | return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); | |
896 | } | |
897 | ||
0c01b644 GR |
898 | static ssize_t show_update_interval(struct device *dev, |
899 | struct device_attribute *attr, char *buf) | |
900 | { | |
901 | struct lm90_data *data = dev_get_drvdata(dev); | |
902 | ||
903 | return sprintf(buf, "%u\n", data->update_interval); | |
904 | } | |
905 | ||
906 | static ssize_t set_update_interval(struct device *dev, | |
907 | struct device_attribute *attr, | |
908 | const char *buf, size_t count) | |
909 | { | |
910 | struct i2c_client *client = to_i2c_client(dev); | |
911 | struct lm90_data *data = i2c_get_clientdata(client); | |
912 | unsigned long val; | |
913 | int err; | |
914 | ||
915 | err = strict_strtoul(buf, 10, &val); | |
916 | if (err) | |
917 | return err; | |
918 | ||
919 | mutex_lock(&data->update_lock); | |
920 | lm90_set_convrate(client, data, val); | |
921 | mutex_unlock(&data->update_lock); | |
922 | ||
923 | return count; | |
924 | } | |
925 | ||
96512861 GR |
926 | static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4); |
927 | static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0); | |
30d7394b | 928 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 929 | set_temp8, 0); |
96512861 GR |
930 | static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11, |
931 | set_temp11, 0, 1); | |
30d7394b | 932 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 933 | set_temp8, 1); |
96512861 GR |
934 | static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11, |
935 | set_temp11, 1, 2); | |
30d7394b | 936 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 937 | set_temp8, 2); |
30d7394b | 938 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, |
f65e1708 | 939 | set_temp8, 3); |
30d7394b | 940 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, |
f65e1708 JD |
941 | set_temphyst, 2); |
942 | static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3); | |
96512861 GR |
943 | static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, |
944 | set_temp11, 2, 3); | |
2d45771e JD |
945 | |
946 | /* Individual alarm files */ | |
947 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
948 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 949 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
950 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
951 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
952 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
953 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
954 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
955 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
956 | ||
0c01b644 GR |
957 | static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, |
958 | set_update_interval); | |
959 | ||
0e39e01c JD |
960 | static struct attribute *lm90_attributes[] = { |
961 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
962 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
963 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
964 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
965 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
966 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
967 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
968 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
969 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
970 | &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, | |
971 | ||
972 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
973 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 974 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
975 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
976 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
977 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
978 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
979 | &dev_attr_alarms.attr, | |
0c01b644 | 980 | &dev_attr_update_interval.attr, |
0e39e01c JD |
981 | NULL |
982 | }; | |
983 | ||
984 | static const struct attribute_group lm90_group = { | |
985 | .attrs = lm90_attributes, | |
986 | }; | |
987 | ||
6948708d GR |
988 | /* |
989 | * Additional attributes for devices with emergency sensors | |
990 | */ | |
991 | static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
992 | set_temp8, 4); | |
993 | static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
994 | set_temp8, 5); | |
995 | static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst, | |
996 | NULL, 4); | |
997 | static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst, | |
998 | NULL, 5); | |
999 | ||
1000 | static struct attribute *lm90_emergency_attributes[] = { | |
1001 | &sensor_dev_attr_temp1_emergency.dev_attr.attr, | |
1002 | &sensor_dev_attr_temp2_emergency.dev_attr.attr, | |
1003 | &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr, | |
1004 | &sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr, | |
1005 | NULL | |
1006 | }; | |
1007 | ||
1008 | static const struct attribute_group lm90_emergency_group = { | |
1009 | .attrs = lm90_emergency_attributes, | |
1010 | }; | |
1011 | ||
06e1c0a2 GR |
1012 | static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15); |
1013 | static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1014 | ||
1015 | static struct attribute *lm90_emergency_alarm_attributes[] = { | |
1016 | &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr, | |
1017 | &sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr, | |
1018 | NULL | |
1019 | }; | |
1020 | ||
1021 | static const struct attribute_group lm90_emergency_alarm_group = { | |
1022 | .attrs = lm90_emergency_alarm_attributes, | |
1023 | }; | |
1024 | ||
1025 | /* | |
1026 | * Additional attributes for devices with 3 temperature sensors | |
1027 | */ | |
1028 | static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5); | |
1029 | static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11, | |
1030 | set_temp11, 3, 6); | |
1031 | static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11, | |
1032 | set_temp11, 4, 7); | |
1033 | static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8, | |
1034 | set_temp8, 6); | |
1035 | static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6); | |
1036 | static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8, | |
1037 | set_temp8, 7); | |
1038 | static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst, | |
1039 | NULL, 7); | |
1040 | ||
1041 | static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9); | |
1042 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10); | |
1043 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11); | |
1044 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12); | |
1045 | static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14); | |
1046 | ||
1047 | static struct attribute *lm90_temp3_attributes[] = { | |
1048 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
1049 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
1050 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
1051 | &sensor_dev_attr_temp3_crit.dev_attr.attr, | |
1052 | &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, | |
1053 | &sensor_dev_attr_temp3_emergency.dev_attr.attr, | |
1054 | &sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr, | |
1055 | ||
1056 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
1057 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
1058 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
1059 | &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, | |
1060 | &sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr, | |
1061 | NULL | |
1062 | }; | |
1063 | ||
1064 | static const struct attribute_group lm90_temp3_group = { | |
1065 | .attrs = lm90_temp3_attributes, | |
1066 | }; | |
1067 | ||
c3df5806 JD |
1068 | /* pec used for ADM1032 only */ |
1069 | static ssize_t show_pec(struct device *dev, struct device_attribute *dummy, | |
1070 | char *buf) | |
1071 | { | |
1072 | struct i2c_client *client = to_i2c_client(dev); | |
1073 | return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); | |
1074 | } | |
1075 | ||
1076 | static ssize_t set_pec(struct device *dev, struct device_attribute *dummy, | |
1077 | const char *buf, size_t count) | |
1078 | { | |
1079 | struct i2c_client *client = to_i2c_client(dev); | |
11e57812 GR |
1080 | long val; |
1081 | int err; | |
1082 | ||
1083 | err = strict_strtol(buf, 10, &val); | |
1084 | if (err < 0) | |
1085 | return err; | |
c3df5806 JD |
1086 | |
1087 | switch (val) { | |
1088 | case 0: | |
1089 | client->flags &= ~I2C_CLIENT_PEC; | |
1090 | break; | |
1091 | case 1: | |
1092 | client->flags |= I2C_CLIENT_PEC; | |
1093 | break; | |
1094 | default: | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
1098 | return count; | |
1099 | } | |
1100 | ||
1101 | static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec); | |
1102 | ||
1da177e4 LT |
1103 | /* |
1104 | * Real code | |
1105 | */ | |
1106 | ||
15b66ab6 GR |
1107 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
1108 | static int lm90_detect(struct i2c_client *new_client, | |
1109 | struct i2c_board_info *info) | |
8256fe0f | 1110 | { |
15b66ab6 GR |
1111 | struct i2c_adapter *adapter = new_client->adapter; |
1112 | int address = new_client->addr; | |
1113 | const char *name = NULL; | |
f90be42f | 1114 | int man_id, chip_id, reg_config1, reg_config2, reg_convrate; |
8256fe0f | 1115 | |
15b66ab6 GR |
1116 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
1117 | return -ENODEV; | |
1da177e4 | 1118 | |
8f2fa77c JD |
1119 | /* detection and identification */ |
1120 | if ((man_id = i2c_smbus_read_byte_data(new_client, | |
e0ae87a4 | 1121 | LM90_REG_R_MAN_ID)) < 0 |
8f2fa77c | 1122 | || (chip_id = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 1123 | LM90_REG_R_CHIP_ID)) < 0 |
8f2fa77c | 1124 | || (reg_config1 = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 1125 | LM90_REG_R_CONFIG1)) < 0 |
8f2fa77c | 1126 | || (reg_convrate = i2c_smbus_read_byte_data(new_client, |
e0ae87a4 | 1127 | LM90_REG_R_CONVRATE)) < 0) |
8f2fa77c JD |
1128 | return -ENODEV; |
1129 | ||
f90be42f | 1130 | if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) { |
8f2fa77c JD |
1131 | reg_config2 = i2c_smbus_read_byte_data(new_client, |
1132 | LM90_REG_R_CONFIG2); | |
1133 | if (reg_config2 < 0) | |
9b0e8526 | 1134 | return -ENODEV; |
f90be42f JD |
1135 | } else |
1136 | reg_config2 = 0; /* Make compiler happy */ | |
8f2fa77c | 1137 | |
f90be42f JD |
1138 | if ((address == 0x4C || address == 0x4D) |
1139 | && man_id == 0x01) { /* National Semiconductor */ | |
8f2fa77c JD |
1140 | if ((reg_config1 & 0x2A) == 0x00 |
1141 | && (reg_config2 & 0xF8) == 0x00 | |
1142 | && reg_convrate <= 0x09) { | |
1143 | if (address == 0x4C | |
1144 | && (chip_id & 0xF0) == 0x20) { /* LM90 */ | |
1145 | name = "lm90"; | |
32c82a93 | 1146 | } else |
8f2fa77c JD |
1147 | if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ |
1148 | name = "lm99"; | |
1149 | dev_info(&adapter->dev, | |
1150 | "Assuming LM99 chip at 0x%02x\n", | |
1151 | address); | |
1152 | dev_info(&adapter->dev, | |
1153 | "If it is an LM89, instantiate it " | |
1154 | "with the new_device sysfs " | |
1155 | "interface\n"); | |
271dabf5 | 1156 | } else |
8f2fa77c JD |
1157 | if (address == 0x4C |
1158 | && (chip_id & 0xF0) == 0x10) { /* LM86 */ | |
1159 | name = "lm86"; | |
1da177e4 LT |
1160 | } |
1161 | } | |
8f2fa77c JD |
1162 | } else |
1163 | if ((address == 0x4C || address == 0x4D) | |
1164 | && man_id == 0x41) { /* Analog Devices */ | |
1165 | if ((chip_id & 0xF0) == 0x40 /* ADM1032 */ | |
1166 | && (reg_config1 & 0x3F) == 0x00 | |
1167 | && reg_convrate <= 0x0A) { | |
1168 | name = "adm1032"; | |
1169 | /* The ADM1032 supports PEC, but only if combined | |
1170 | transactions are not used. */ | |
1171 | if (i2c_check_functionality(adapter, | |
1172 | I2C_FUNC_SMBUS_BYTE)) | |
1173 | info->flags |= I2C_CLIENT_PEC; | |
1174 | } else | |
1175 | if (chip_id == 0x51 /* ADT7461 */ | |
1176 | && (reg_config1 & 0x1B) == 0x00 | |
1177 | && reg_convrate <= 0x0A) { | |
1178 | name = "adt7461"; | |
5a4e5e6a GR |
1179 | } else |
1180 | if (chip_id == 0x57 /* ADT7461A, NCT1008 */ | |
1181 | && (reg_config1 & 0x1B) == 0x00 | |
1182 | && reg_convrate <= 0x0A) { | |
1183 | name = "adt7461a"; | |
8f2fa77c JD |
1184 | } |
1185 | } else | |
1186 | if (man_id == 0x4D) { /* Maxim */ | |
06e1c0a2 GR |
1187 | int reg_emerg, reg_emerg2, reg_status2; |
1188 | ||
1189 | /* | |
1190 | * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read | |
1191 | * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG | |
1192 | * exists, both readings will reflect the same value. Otherwise, | |
1193 | * the readings will be different. | |
1194 | */ | |
1195 | if ((reg_emerg = i2c_smbus_read_byte_data(new_client, | |
1196 | MAX6659_REG_R_REMOTE_EMERG)) < 0 | |
1197 | || i2c_smbus_read_byte_data(new_client, LM90_REG_R_MAN_ID) < 0 | |
1198 | || (reg_emerg2 = i2c_smbus_read_byte_data(new_client, | |
1199 | MAX6659_REG_R_REMOTE_EMERG)) < 0 | |
1200 | || (reg_status2 = i2c_smbus_read_byte_data(new_client, | |
1201 | MAX6696_REG_R_STATUS2)) < 0) | |
1202 | return -ENODEV; | |
1203 | ||
8f2fa77c JD |
1204 | /* |
1205 | * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id | |
1206 | * register. Reading from that address will return the last | |
1207 | * read value, which in our case is those of the man_id | |
1208 | * register. Likewise, the config1 register seems to lack a | |
1209 | * low nibble, so the value will be those of the previous | |
1210 | * read, so in our case those of the man_id register. | |
13c84951 GR |
1211 | * MAX6659 has a third set of upper temperature limit registers. |
1212 | * Those registers also return values on MAX6657 and MAX6658, | |
1213 | * thus the only way to detect MAX6659 is by its address. | |
1214 | * For this reason it will be mis-detected as MAX6657 if its | |
1215 | * address is 0x4C. | |
8f2fa77c JD |
1216 | */ |
1217 | if (chip_id == man_id | |
13c84951 | 1218 | && (address == 0x4C || address == 0x4D || address == 0x4E) |
8f2fa77c JD |
1219 | && (reg_config1 & 0x1F) == (man_id & 0x0F) |
1220 | && reg_convrate <= 0x09) { | |
13c84951 GR |
1221 | if (address == 0x4C) |
1222 | name = "max6657"; | |
1223 | else | |
1224 | name = "max6659"; | |
8f2fa77c | 1225 | } else |
06e1c0a2 GR |
1226 | /* |
1227 | * Even though MAX6695 and MAX6696 do not have a chip ID | |
1228 | * register, reading it returns 0x01. Bit 4 of the config1 | |
1229 | * register is unused and should return zero when read. Bit 0 of | |
1230 | * the status2 register is unused and should return zero when | |
1231 | * read. | |
1232 | * | |
1233 | * MAX6695 and MAX6696 have an additional set of temperature | |
1234 | * limit registers. We can detect those chips by checking if | |
1235 | * one of those registers exists. | |
1236 | */ | |
1237 | if (chip_id == 0x01 | |
1238 | && (reg_config1 & 0x10) == 0x00 | |
1239 | && (reg_status2 & 0x01) == 0x00 | |
1240 | && reg_emerg == reg_emerg2 | |
1241 | && reg_convrate <= 0x07) { | |
1242 | name = "max6696"; | |
1243 | } else | |
8f2fa77c JD |
1244 | /* |
1245 | * The chip_id register of the MAX6680 and MAX6681 holds the | |
1246 | * revision of the chip. The lowest bit of the config1 register | |
1247 | * is unused and should return zero when read, so should the | |
1248 | * second to last bit of config1 (software reset). | |
1249 | */ | |
1250 | if (chip_id == 0x01 | |
1251 | && (reg_config1 & 0x03) == 0x00 | |
1252 | && reg_convrate <= 0x07) { | |
1253 | name = "max6680"; | |
1254 | } else | |
1255 | /* | |
1256 | * The chip_id register of the MAX6646/6647/6649 holds the | |
1257 | * revision of the chip. The lowest 6 bits of the config1 | |
1258 | * register are unused and should return zero when read. | |
1259 | */ | |
1260 | if (chip_id == 0x59 | |
1261 | && (reg_config1 & 0x3f) == 0x00 | |
1262 | && reg_convrate <= 0x07) { | |
1263 | name = "max6646"; | |
1da177e4 | 1264 | } |
6771ea1f JD |
1265 | } else |
1266 | if (address == 0x4C | |
1267 | && man_id == 0x5C) { /* Winbond/Nuvoton */ | |
c4f99a2b JD |
1268 | if ((reg_config1 & 0x2A) == 0x00 |
1269 | && (reg_config2 & 0xF8) == 0x00) { | |
1270 | if (chip_id == 0x01 /* W83L771W/G */ | |
1271 | && reg_convrate <= 0x09) { | |
1272 | name = "w83l771"; | |
1273 | } else | |
1274 | if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */ | |
1275 | && reg_convrate <= 0x08) { | |
1276 | name = "w83l771"; | |
1277 | } | |
6771ea1f | 1278 | } |
2ef01793 | 1279 | } else |
6d101c58 JD |
1280 | if (address >= 0x48 && address <= 0x4F |
1281 | && man_id == 0xA1) { /* NXP Semiconductor/Philips */ | |
6d101c58 JD |
1282 | if (chip_id == 0x00 |
1283 | && (reg_config1 & 0x2A) == 0x00 | |
1284 | && (reg_config2 & 0xFE) == 0x00 | |
1285 | && reg_convrate <= 0x09) { | |
2ef01793 SD |
1286 | name = "sa56004"; |
1287 | } | |
1da177e4 LT |
1288 | } |
1289 | ||
8f2fa77c JD |
1290 | if (!name) { /* identification failed */ |
1291 | dev_dbg(&adapter->dev, | |
1292 | "Unsupported chip at 0x%02x (man_id=0x%02X, " | |
1293 | "chip_id=0x%02X)\n", address, man_id, chip_id); | |
1294 | return -ENODEV; | |
1da177e4 | 1295 | } |
8f2fa77c | 1296 | |
9b0e8526 JD |
1297 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | ||
b6fc1bac GR |
1302 | static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data) |
1303 | { | |
06e1c0a2 GR |
1304 | if (data->flags & LM90_HAVE_TEMP3) |
1305 | sysfs_remove_group(&client->dev.kobj, &lm90_temp3_group); | |
1306 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) | |
1307 | sysfs_remove_group(&client->dev.kobj, | |
1308 | &lm90_emergency_alarm_group); | |
6948708d GR |
1309 | if (data->flags & LM90_HAVE_EMERGENCY) |
1310 | sysfs_remove_group(&client->dev.kobj, | |
1311 | &lm90_emergency_group); | |
b6fc1bac GR |
1312 | if (data->flags & LM90_HAVE_OFFSET) |
1313 | device_remove_file(&client->dev, | |
1314 | &sensor_dev_attr_temp2_offset.dev_attr); | |
1315 | device_remove_file(&client->dev, &dev_attr_pec); | |
1316 | sysfs_remove_group(&client->dev.kobj, &lm90_group); | |
1317 | } | |
1318 | ||
15b66ab6 GR |
1319 | static void lm90_init_client(struct i2c_client *client) |
1320 | { | |
0c01b644 | 1321 | u8 config, convrate; |
15b66ab6 GR |
1322 | struct lm90_data *data = i2c_get_clientdata(client); |
1323 | ||
0c01b644 GR |
1324 | if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) { |
1325 | dev_warn(&client->dev, "Failed to read convrate register!\n"); | |
1326 | convrate = LM90_DEF_CONVRATE_RVAL; | |
1327 | } | |
1328 | data->convrate_orig = convrate; | |
1329 | ||
15b66ab6 GR |
1330 | /* |
1331 | * Start the conversions. | |
1332 | */ | |
0c01b644 | 1333 | lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */ |
15b66ab6 GR |
1334 | if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) { |
1335 | dev_warn(&client->dev, "Initialization failed!\n"); | |
1336 | return; | |
1337 | } | |
1338 | data->config_orig = config; | |
1339 | ||
1340 | /* Check Temperature Range Select */ | |
1341 | if (data->kind == adt7461) { | |
1342 | if (config & 0x04) | |
1343 | data->flags |= LM90_FLAG_ADT7461_EXT; | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * Put MAX6680/MAX8881 into extended resolution (bit 0x10, | |
1348 | * 0.125 degree resolution) and range (0x08, extend range | |
1349 | * to -64 degree) mode for the remote temperature sensor. | |
1350 | */ | |
1351 | if (data->kind == max6680) | |
1352 | config |= 0x18; | |
1353 | ||
1354 | /* | |
1355 | * Select external channel 0 for max6695/96 | |
1356 | */ | |
1357 | if (data->kind == max6696) | |
1358 | config &= ~0x08; | |
1359 | ||
1360 | config &= 0xBF; /* run */ | |
1361 | if (config != data->config_orig) /* Only write if changed */ | |
1362 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); | |
1363 | } | |
1364 | ||
9b0e8526 JD |
1365 | static int lm90_probe(struct i2c_client *new_client, |
1366 | const struct i2c_device_id *id) | |
1367 | { | |
1368 | struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent); | |
1369 | struct lm90_data *data; | |
1370 | int err; | |
1da177e4 | 1371 | |
9b0e8526 JD |
1372 | data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL); |
1373 | if (!data) { | |
1374 | err = -ENOMEM; | |
1375 | goto exit; | |
1376 | } | |
1377 | i2c_set_clientdata(new_client, data); | |
9a61bf63 | 1378 | mutex_init(&data->update_lock); |
1da177e4 | 1379 | |
9b0e8526 JD |
1380 | /* Set the device type */ |
1381 | data->kind = id->driver_data; | |
1382 | if (data->kind == adm1032) { | |
1383 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) | |
1384 | new_client->flags &= ~I2C_CLIENT_PEC; | |
1385 | } | |
1da177e4 | 1386 | |
53de3342 JD |
1387 | /* Different devices have different alarm bits triggering the |
1388 | * ALERT# output */ | |
4667bcb8 | 1389 | data->alert_alarms = lm90_params[data->kind].alert_alarms; |
53de3342 | 1390 | |
88073bb1 | 1391 | /* Set chip capabilities */ |
4667bcb8 | 1392 | data->flags = lm90_params[data->kind].flags; |
a095f687 | 1393 | data->reg_local_ext = lm90_params[data->kind].reg_local_ext; |
06e1c0a2 | 1394 | |
0c01b644 GR |
1395 | /* Set maximum conversion rate */ |
1396 | data->max_convrate = lm90_params[data->kind].max_convrate; | |
1397 | ||
1da177e4 LT |
1398 | /* Initialize the LM90 chip */ |
1399 | lm90_init_client(new_client); | |
1400 | ||
1401 | /* Register sysfs hooks */ | |
11e57812 GR |
1402 | err = sysfs_create_group(&new_client->dev.kobj, &lm90_group); |
1403 | if (err) | |
9b0e8526 | 1404 | goto exit_free; |
0e39e01c | 1405 | if (new_client->flags & I2C_CLIENT_PEC) { |
11e57812 GR |
1406 | err = device_create_file(&new_client->dev, &dev_attr_pec); |
1407 | if (err) | |
0e39e01c JD |
1408 | goto exit_remove_files; |
1409 | } | |
88073bb1 | 1410 | if (data->flags & LM90_HAVE_OFFSET) { |
11e57812 GR |
1411 | err = device_create_file(&new_client->dev, |
1412 | &sensor_dev_attr_temp2_offset.dev_attr); | |
1413 | if (err) | |
69f2f96d JD |
1414 | goto exit_remove_files; |
1415 | } | |
6948708d GR |
1416 | if (data->flags & LM90_HAVE_EMERGENCY) { |
1417 | err = sysfs_create_group(&new_client->dev.kobj, | |
1418 | &lm90_emergency_group); | |
1419 | if (err) | |
1420 | goto exit_remove_files; | |
1421 | } | |
06e1c0a2 GR |
1422 | if (data->flags & LM90_HAVE_EMERGENCY_ALARM) { |
1423 | err = sysfs_create_group(&new_client->dev.kobj, | |
1424 | &lm90_emergency_alarm_group); | |
1425 | if (err) | |
1426 | goto exit_remove_files; | |
1427 | } | |
1428 | if (data->flags & LM90_HAVE_TEMP3) { | |
1429 | err = sysfs_create_group(&new_client->dev.kobj, | |
1430 | &lm90_temp3_group); | |
1431 | if (err) | |
1432 | goto exit_remove_files; | |
1433 | } | |
0e39e01c | 1434 | |
1beeffe4 TJ |
1435 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
1436 | if (IS_ERR(data->hwmon_dev)) { | |
1437 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 1438 | goto exit_remove_files; |
943b0830 MH |
1439 | } |
1440 | ||
1da177e4 LT |
1441 | return 0; |
1442 | ||
0e39e01c | 1443 | exit_remove_files: |
b6fc1bac | 1444 | lm90_remove_files(new_client, data); |
1da177e4 LT |
1445 | exit_free: |
1446 | kfree(data); | |
1447 | exit: | |
1448 | return err; | |
1449 | } | |
1450 | ||
9b0e8526 | 1451 | static int lm90_remove(struct i2c_client *client) |
1da177e4 | 1452 | { |
943b0830 | 1453 | struct lm90_data *data = i2c_get_clientdata(client); |
1da177e4 | 1454 | |
1beeffe4 | 1455 | hwmon_device_unregister(data->hwmon_dev); |
b6fc1bac | 1456 | lm90_remove_files(client, data); |
943b0830 | 1457 | |
95238364 | 1458 | /* Restore initial configuration */ |
0c01b644 GR |
1459 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, |
1460 | data->convrate_orig); | |
95238364 JD |
1461 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, |
1462 | data->config_orig); | |
1463 | ||
943b0830 | 1464 | kfree(data); |
1da177e4 LT |
1465 | return 0; |
1466 | } | |
1467 | ||
53de3342 JD |
1468 | static void lm90_alert(struct i2c_client *client, unsigned int flag) |
1469 | { | |
1470 | struct lm90_data *data = i2c_get_clientdata(client); | |
06e1c0a2 | 1471 | u8 config, alarms, alarms2 = 0; |
53de3342 JD |
1472 | |
1473 | lm90_read_reg(client, LM90_REG_R_STATUS, &alarms); | |
06e1c0a2 GR |
1474 | |
1475 | if (data->kind == max6696) | |
1476 | lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2); | |
1477 | ||
1478 | if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) { | |
53de3342 JD |
1479 | dev_info(&client->dev, "Everything OK\n"); |
1480 | } else { | |
1481 | if (alarms & 0x61) | |
1482 | dev_warn(&client->dev, | |
1483 | "temp%d out of range, please check!\n", 1); | |
1484 | if (alarms & 0x1a) | |
1485 | dev_warn(&client->dev, | |
1486 | "temp%d out of range, please check!\n", 2); | |
1487 | if (alarms & 0x04) | |
1488 | dev_warn(&client->dev, | |
1489 | "temp%d diode open, please check!\n", 2); | |
1490 | ||
06e1c0a2 GR |
1491 | if (alarms2 & 0x18) |
1492 | dev_warn(&client->dev, | |
1493 | "temp%d out of range, please check!\n", 3); | |
1494 | ||
53de3342 JD |
1495 | /* Disable ALERT# output, because these chips don't implement |
1496 | SMBus alert correctly; they should only hold the alert line | |
1497 | low briefly. */ | |
1179324c | 1498 | if ((data->flags & LM90_HAVE_BROKEN_ALERT) |
53de3342 JD |
1499 | && (alarms & data->alert_alarms)) { |
1500 | dev_dbg(&client->dev, "Disabling ALERT#\n"); | |
1501 | lm90_read_reg(client, LM90_REG_R_CONFIG1, &config); | |
1502 | i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, | |
1503 | config | 0x80); | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | ||
15b66ab6 GR |
1508 | static struct i2c_driver lm90_driver = { |
1509 | .class = I2C_CLASS_HWMON, | |
1510 | .driver = { | |
1511 | .name = "lm90", | |
1512 | }, | |
1513 | .probe = lm90_probe, | |
1514 | .remove = lm90_remove, | |
1515 | .alert = lm90_alert, | |
1516 | .id_table = lm90_id, | |
1517 | .detect = lm90_detect, | |
1518 | .address_list = normal_i2c, | |
1519 | }; | |
1da177e4 LT |
1520 | |
1521 | static int __init sensors_lm90_init(void) | |
1522 | { | |
1523 | return i2c_add_driver(&lm90_driver); | |
1524 | } | |
1525 | ||
1526 | static void __exit sensors_lm90_exit(void) | |
1527 | { | |
1528 | i2c_del_driver(&lm90_driver); | |
1529 | } | |
1530 | ||
1531 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
1532 | MODULE_DESCRIPTION("LM90/ADM1032 driver"); | |
1533 | MODULE_LICENSE("GPL"); | |
1534 | ||
1535 | module_init(sensors_lm90_init); | |
1536 | module_exit(sensors_lm90_exit); |