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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
Jean Delvare95238362010-03-05 22:17:14 +01004 * Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
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
Jean Delvarea874a102008-10-17 17:51:10 +02009 * temperature) and a 3-4 deg accuracy.
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
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
Jean Delvare97ae60b2008-10-26 17:04:39 +010015 * degrees, which allows for higher temperatures measurement.
Steven Cole44bbe872005-05-03 18:21:25 -060016 * Note that there is no way to differentiate between both chips.
Jean Delvare97ae60b2008-10-26 17:04:39 +010017 * When device is auto-detected, the driver will assume an LM99.
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 *
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 *
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
Jean Delvarea874a102008-10-17 17:51:10 +020025 * that are not handled by this driver. Among others, it has a higher
26 * accuracy than the LM90, much like the LM86 does.
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 *
28 * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
Jean Delvarea874a102008-10-17 17:51:10 +020029 * chips made by Maxim. These chips are similar to the LM86.
Steven Cole44bbe872005-05-03 18:21:25 -060030 * Note that there is no easy way to differentiate between the three
Guenter Roeck69487082010-10-28 20:31:43 +020031 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 *
Darrick J. Wong1a51e062009-03-12 13:36:38 +010037 * 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.
Ben Hutchings271dabf2008-10-17 17:51:11 +020041 *
Rainer Birkenmaier32c82a92007-06-09 10:11:16 -040042 * This driver also supports the MAX6680 and MAX6681, two other sensor
43 * chips made by Maxim. These are quite similar to the other Maxim
Jean Delvarea874a102008-10-17 17:51:10 +020044 * chips. The MAX6680 and MAX6681 only differ in the pinout so they can
45 * be treated identically.
Rainer Birkenmaier32c82a92007-06-09 10:11:16 -040046 *
Guenter Roeck06e1c0a2010-10-28 20:31:43 +020047 * 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 *
Guenter Roeck5a4e5e62011-04-29 16:33:35 +020052 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 *
Stijn Devriendt2ef01792011-06-06 10:40:45 +000057 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#include <linux/module.h>
80#include <linux/init.h>
81#include <linux/slab.h>
82#include <linux/jiffies.h>
83#include <linux/i2c.h>
Jean Delvare10c08f82005-06-06 19:34:45 +020084#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040085#include <linux/hwmon.h>
86#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010087#include <linux/mutex.h>
Jean Delvare0e39e012006-09-24 21:16:40 +020088#include <linux/sysfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90/*
91 * Addresses to scan
92 * Address is fully defined internally and cannot be changed except for
Rainer Birkenmaier32c82a92007-06-09 10:11:16 -040093 * MAX6659, MAX6680 and MAX6681.
Guenter Roeck5a4e5e62011-04-29 16:33:35 +020094 * 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.
Ben Hutchings271dabf2008-10-17 17:51:11 +020098 * MAX6647 has address 0x4e.
Guenter Roeck13c84952010-10-28 20:31:43 +020099 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
Rainer Birkenmaier32c82a92007-06-09 10:11:16 -0400100 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
101 * 0x4c, 0x4d or 0x4e.
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000102 * SA56004 can have address 0x48 through 0x4F.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 */
104
Mark M. Hoffman25e9c862008-02-17 22:28:03 -0500105static const unsigned short normal_i2c[] = {
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000106 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
107 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Guenter Roeck13c84952010-10-28 20:31:43 +0200109enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000110 max6646, w83l771, max6696, sa56004 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
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
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200151/* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
Jean Delvaref65e1702008-10-17 17:51:09 +0200152
153#define MAX6657_REG_R_LOCAL_TEMPL 0x11
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200154#define MAX6696_REG_R_STATUS2 0x12
Guenter Roeck69487082010-10-28 20:31:43 +0200155#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
Jean Delvaref65e1702008-10-17 17:51:09 +0200159
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000160/* SA56004 registers */
161
162#define SA56004_REG_R_LOCAL_TEMPL 0x22
163
Guenter Roeck0c01b642010-10-28 20:31:44 +0200164#define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
165#define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167/*
Nate Case23b2d472008-10-17 17:51:10 +0200168 * Device flags
169 */
Guenter Roeck88073bb2010-10-28 20:31:43 +0200170#define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
171/* Device features */
172#define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
Guenter Roeck88073bb2010-10-28 20:31:43 +0200173#define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
Guenter Roeck69487082010-10-28 20:31:43 +0200174#define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200175#define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
176#define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
Guenter Roeck11793242010-10-28 20:31:44 +0200177#define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
Nate Case23b2d472008-10-17 17:51:10 +0200178
179/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 * Driver data (common to all clients)
181 */
182
Jean Delvare9b0e8522008-07-16 19:30:15 +0200183static const struct i2c_device_id lm90_id[] = {
184 { "adm1032", adm1032 },
185 { "adt7461", adt7461 },
Guenter Roeck5a4e5e62011-04-29 16:33:35 +0200186 { "adt7461a", adt7461 },
Jean Delvare9b0e8522008-07-16 19:30:15 +0200187 { "lm90", lm90 },
188 { "lm86", lm86 },
Jean Delvare97ae60b2008-10-26 17:04:39 +0100189 { "lm89", lm86 },
190 { "lm99", lm99 },
Ben Hutchings271dabf2008-10-17 17:51:11 +0200191 { "max6646", max6646 },
192 { "max6647", max6646 },
193 { "max6649", max6646 },
Jean Delvare9b0e8522008-07-16 19:30:15 +0200194 { "max6657", max6657 },
195 { "max6658", max6657 },
Guenter Roeck13c84952010-10-28 20:31:43 +0200196 { "max6659", max6659 },
Jean Delvare9b0e8522008-07-16 19:30:15 +0200197 { "max6680", max6680 },
198 { "max6681", max6680 },
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200199 { "max6695", max6696 },
200 { "max6696", max6696 },
Guenter Roeck5a4e5e62011-04-29 16:33:35 +0200201 { "nct1008", adt7461 },
Jean Delvare6771ea12010-03-05 22:17:13 +0100202 { "w83l771", w83l771 },
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000203 { "sa56004", sa56004 },
Jean Delvare9b0e8522008-07-16 19:30:15 +0200204 { }
205};
206MODULE_DEVICE_TABLE(i2c, lm90_id);
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208/*
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200209 * chip type specific parameters
210 */
211struct lm90_params {
212 u32 flags; /* Capabilities */
213 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
214 /* Upper 8 bits for max6695/96 */
Guenter Roeck0c01b642010-10-28 20:31:44 +0200215 u8 max_convrate; /* Maximum conversion rate register value */
Jean Delvarea095f682011-07-27 23:22:25 -0700216 u8 reg_local_ext; /* Extended local temp register (optional) */
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200217};
218
219static const struct lm90_params lm90_params[] = {
220 [adm1032] = {
Guenter Roeck11793242010-10-28 20:31:44 +0200221 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
222 | LM90_HAVE_BROKEN_ALERT,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200223 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200224 .max_convrate = 10,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200225 },
226 [adt7461] = {
Guenter Roeck11793242010-10-28 20:31:44 +0200227 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
228 | LM90_HAVE_BROKEN_ALERT,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200229 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200230 .max_convrate = 10,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200231 },
232 [lm86] = {
233 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
234 .alert_alarms = 0x7b,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200235 .max_convrate = 9,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200236 },
237 [lm90] = {
238 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
239 .alert_alarms = 0x7b,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200240 .max_convrate = 9,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200241 },
242 [lm99] = {
243 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
244 .alert_alarms = 0x7b,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200245 .max_convrate = 9,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200246 },
247 [max6646] = {
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200248 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200249 .max_convrate = 6,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000250 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200251 },
252 [max6657] = {
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200253 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200254 .max_convrate = 8,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000255 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200256 },
257 [max6659] = {
Jean Delvarea095f682011-07-27 23:22:25 -0700258 .flags = LM90_HAVE_EMERGENCY,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200259 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200260 .max_convrate = 8,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000261 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200262 },
263 [max6680] = {
264 .flags = LM90_HAVE_OFFSET,
265 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200266 .max_convrate = 7,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200267 },
268 [max6696] = {
Jean Delvarea095f682011-07-27 23:22:25 -0700269 .flags = LM90_HAVE_EMERGENCY
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200270 | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
271 .alert_alarms = 0x187c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200272 .max_convrate = 6,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000273 .reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200274 },
275 [w83l771] = {
276 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
277 .alert_alarms = 0x7c,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200278 .max_convrate = 8,
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200279 },
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000280 [sa56004] = {
Jean Delvarea095f682011-07-27 23:22:25 -0700281 .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000282 .alert_alarms = 0x7b,
283 .max_convrate = 9,
284 .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
285 },
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200286};
287
288/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 * Client data (each client gets its own)
290 */
291
292struct lm90_data {
Tony Jones1beeffe2007-08-20 13:46:20 -0700293 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100294 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 char valid; /* zero until following fields are valid */
296 unsigned long last_updated; /* in jiffies */
297 int kind;
Guenter Roeck4667bcb2010-10-28 20:31:43 +0200298 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Guenter Roeck0c01b642010-10-28 20:31:44 +0200300 int update_interval; /* in milliseconds */
301
Jean Delvare95238362010-03-05 22:17:14 +0100302 u8 config_orig; /* Original configuration register value */
Guenter Roeck0c01b642010-10-28 20:31:44 +0200303 u8 convrate_orig; /* Original conversion rate register value */
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200304 u16 alert_alarms; /* Which alarm bits trigger ALERT# */
305 /* Upper 8 bits for max6695/96 */
Guenter Roeck0c01b642010-10-28 20:31:44 +0200306 u8 max_convrate; /* Maximum conversion rate */
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000307 u8 reg_local_ext; /* local extension register offset */
Jean Delvare95238362010-03-05 22:17:14 +0100308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 /* registers values */
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200310 s8 temp8[8]; /* 0: local low limit
Jean Delvaref65e1702008-10-17 17:51:09 +0200311 1: local high limit
312 2: local critical limit
Guenter Roeck69487082010-10-28 20:31:43 +0200313 3: remote critical limit
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200314 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
Jean Delvare30d73942005-06-05 21:27:28 +0200319 1: remote low limit
Jean Delvare69f2f962007-09-05 14:15:37 +0200320 2: remote high limit
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200321 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) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 u8 temp_hyst;
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200328 u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329};
330
331/*
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200332 * 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 */
339static 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 */
352static 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
373static 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
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300381 * between the readings. The datasheet says we should either use
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200382 * 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 */
413static 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
Guenter Roeck0c01b642010-10-28 20:31:44 +0200429/*
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 */
434static 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
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200453static 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);
Guenter Roeck0c01b642010-10-28 20:31:44 +0200457 unsigned long next_update;
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200458
459 mutex_lock(&data->update_lock);
460
Guenter Roeck0c01b642010-10-28 20:31:44 +0200461 next_update = data->last_updated
462 + msecs_to_jiffies(data->update_interval) + 1;
463 if (time_after(jiffies, next_update) || !data->valid) {
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200464 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
Jean Delvarea095f682011-07-27 23:22:25 -0700474 if (data->reg_local_ext) {
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200475 lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
Stijn Devriendt2ef01792011-06-06 10:40:45 +0000476 data->reg_local_ext,
Guenter Roeck15b66ab2010-10-28 20:31:43 +0200477 &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
560/*
Nate Casecea50fe2008-10-17 17:51:10 +0200561 * 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
Ben Hutchings271dabf2008-10-17 17:51:11 +0200565 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
566 * Maxim chips use unsigned values.
Nate Casecea50fe2008-10-17 17:51:10 +0200567 */
568
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200569static inline int temp_from_s8(s8 val)
Nate Casecea50fe2008-10-17 17:51:10 +0200570{
571 return val * 1000;
572}
573
Ben Hutchings271dabf2008-10-17 17:51:11 +0200574static inline int temp_from_u8(u8 val)
575{
576 return val * 1000;
577}
578
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200579static inline int temp_from_s16(s16 val)
Nate Casecea50fe2008-10-17 17:51:10 +0200580{
581 return val / 32 * 125;
582}
583
Ben Hutchings271dabf2008-10-17 17:51:11 +0200584static inline int temp_from_u16(u16 val)
585{
586 return val / 32 * 125;
587}
588
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200589static s8 temp_to_s8(long val)
Nate Casecea50fe2008-10-17 17:51:10 +0200590{
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
Ben Hutchings271dabf2008-10-17 17:51:11 +0200600static 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
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200609static s16 temp_to_s16(long val)
Nate Casecea50fe2008-10-17 17:51:10 +0200610{
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
620static 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/*
Nate Case23b2d472008-10-17 17:51:10 +0200630 * 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.
Nate Casecea50fe2008-10-17 17:51:10 +0200636 */
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200637static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
Nate Casecea50fe2008-10-17 17:51:10 +0200638{
Nate Case23b2d472008-10-17 17:51:10 +0200639 if (data->flags & LM90_FLAG_ADT7461_EXT)
640 return (val - 64) * 1000;
641 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200642 return temp_from_s8(val);
Nate Casecea50fe2008-10-17 17:51:10 +0200643}
644
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200645static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
Nate Casecea50fe2008-10-17 17:51:10 +0200646{
Nate Case23b2d472008-10-17 17:51:10 +0200647 if (data->flags & LM90_FLAG_ADT7461_EXT)
648 return (val - 0x4000) / 64 * 250;
649 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200650 return temp_from_s16(val);
Nate Case23b2d472008-10-17 17:51:10 +0200651}
652
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200653static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
Nate Case23b2d472008-10-17 17:51:10 +0200654{
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
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200670static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
Nate Case23b2d472008-10-17 17:51:10 +0200671{
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 }
Nate Casecea50fe2008-10-17 17:51:10 +0200685}
686
687/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 * Sysfs stuff
689 */
690
Jean Delvare30d73942005-06-05 21:27:28 +0200691static 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);
Nate Case23b2d472008-10-17 17:51:10 +0200696 int temp;
697
698 if (data->kind == adt7461)
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200699 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
Ben Hutchings271dabf2008-10-17 17:51:11 +0200700 else if (data->kind == max6646)
701 temp = temp_from_u8(data->temp8[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200702 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200703 temp = temp_from_s8(data->temp8[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200704
Jean Delvare97ae60b2008-10-26 17:04:39 +0100705 /* +16 degrees offset for temp2 for the LM99 */
706 if (data->kind == lm99 && attr->index == 3)
707 temp += 16000;
708
Nate Case23b2d472008-10-17 17:51:10 +0200709 return sprintf(buf, "%d\n", temp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Jean Delvare30d73942005-06-05 21:27:28 +0200712static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
713 const char *buf, size_t count)
714{
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200715 static const u8 reg[8] = {
Jean Delvare30d73942005-06-05 21:27:28 +0200716 LM90_REG_W_LOCAL_LOW,
717 LM90_REG_W_LOCAL_HIGH,
718 LM90_REG_W_LOCAL_CRIT,
719 LM90_REG_W_REMOTE_CRIT,
Guenter Roeck69487082010-10-28 20:31:43 +0200720 MAX6659_REG_W_LOCAL_EMERG,
721 MAX6659_REG_W_REMOTE_EMERG,
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200722 LM90_REG_W_REMOTE_CRIT,
723 MAX6659_REG_W_REMOTE_EMERG,
Jean Delvare30d73942005-06-05 21:27:28 +0200724 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Jean Delvare30d73942005-06-05 21:27:28 +0200726 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);
Jean Delvare30d73942005-06-05 21:27:28 +0200729 int nr = attr->index;
Guenter Roeck11e57812010-10-28 20:31:42 +0200730 long val;
731 int err;
732
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100733 err = kstrtol(buf, 10, &val);
Guenter Roeck11e57812010-10-28 20:31:42 +0200734 if (err < 0)
735 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
Jean Delvare97ae60b2008-10-26 17:04:39 +0100737 /* +16 degrees offset for temp2 for the LM99 */
738 if (data->kind == lm99 && attr->index == 3)
739 val -= 16000;
740
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100741 mutex_lock(&data->update_lock);
Jean Delvare30d73942005-06-05 21:27:28 +0200742 if (data->kind == adt7461)
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200743 data->temp8[nr] = temp_to_u8_adt7461(data, val);
Ben Hutchings271dabf2008-10-17 17:51:11 +0200744 else if (data->kind == max6646)
745 data->temp8[nr] = temp_to_u8(val);
Jean Delvare30d73942005-06-05 21:27:28 +0200746 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200747 data->temp8[nr] = temp_to_s8(val);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200748
749 lm90_select_remote_channel(client, data, nr >= 6);
Jean Delvaref65e1702008-10-17 17:51:09 +0200750 i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200751 lm90_select_remote_channel(client, data, 0);
752
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100753 mutex_unlock(&data->update_lock);
Jean Delvare30d73942005-06-05 21:27:28 +0200754 return count;
755}
756
757static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
758 char *buf)
759{
Guenter Roeck96512862010-10-28 20:31:43 +0200760 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
Jean Delvare30d73942005-06-05 21:27:28 +0200761 struct lm90_data *data = lm90_update_device(dev);
Nate Case23b2d472008-10-17 17:51:10 +0200762 int temp;
763
764 if (data->kind == adt7461)
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200765 temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
Ben Hutchings271dabf2008-10-17 17:51:11 +0200766 else if (data->kind == max6646)
767 temp = temp_from_u16(data->temp11[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200768 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200769 temp = temp_from_s16(data->temp11[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200770
Jean Delvare97ae60b2008-10-26 17:04:39 +0100771 /* +16 degrees offset for temp2 for the LM99 */
772 if (data->kind == lm99 && attr->index <= 2)
773 temp += 16000;
774
Nate Case23b2d472008-10-17 17:51:10 +0200775 return sprintf(buf, "%d\n", temp);
Jean Delvare30d73942005-06-05 21:27:28 +0200776}
777
778static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
779 const char *buf, size_t count)
780{
Guenter Roeck96512862010-10-28 20:31:43 +0200781 struct {
782 u8 high;
783 u8 low;
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200784 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 }
Jean Delvare30d73942005-06-05 21:27:28 +0200791 };
792
Guenter Roeck96512862010-10-28 20:31:43 +0200793 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
Jean Delvare30d73942005-06-05 21:27:28 +0200794 struct i2c_client *client = to_i2c_client(dev);
795 struct lm90_data *data = i2c_get_clientdata(client);
Guenter Roeck96512862010-10-28 20:31:43 +0200796 int nr = attr->nr;
797 int index = attr->index;
Guenter Roeck11e57812010-10-28 20:31:42 +0200798 long val;
799 int err;
800
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100801 err = kstrtol(buf, 10, &val);
Guenter Roeck11e57812010-10-28 20:31:42 +0200802 if (err < 0)
803 return err;
Jean Delvare30d73942005-06-05 21:27:28 +0200804
Jean Delvare97ae60b2008-10-26 17:04:39 +0100805 /* +16 degrees offset for temp2 for the LM99 */
Guenter Roeck96512862010-10-28 20:31:43 +0200806 if (data->kind == lm99 && index <= 2)
Jean Delvare97ae60b2008-10-26 17:04:39 +0100807 val -= 16000;
808
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100809 mutex_lock(&data->update_lock);
Jean Delvare30d73942005-06-05 21:27:28 +0200810 if (data->kind == adt7461)
Guenter Roeck96512862010-10-28 20:31:43 +0200811 data->temp11[index] = temp_to_u16_adt7461(data, val);
Ben Hutchings271dabf2008-10-17 17:51:11 +0200812 else if (data->kind == max6646)
Guenter Roeck96512862010-10-28 20:31:43 +0200813 data->temp11[index] = temp_to_u8(val) << 8;
Guenter Roeck88073bb2010-10-28 20:31:43 +0200814 else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
Guenter Roeck96512862010-10-28 20:31:43 +0200815 data->temp11[index] = temp_to_s16(val);
Guenter Roeck88073bb2010-10-28 20:31:43 +0200816 else
Guenter Roeck96512862010-10-28 20:31:43 +0200817 data->temp11[index] = temp_to_s8(val) << 8;
Jean Delvare5f502a82008-10-17 17:51:09 +0200818
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200819 lm90_select_remote_channel(client, data, reg[nr].channel);
Guenter Roeck96512862010-10-28 20:31:43 +0200820 i2c_smbus_write_byte_data(client, reg[nr].high,
821 data->temp11[index] >> 8);
Guenter Roeck88073bb2010-10-28 20:31:43 +0200822 if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
Guenter Roeck96512862010-10-28 20:31:43 +0200823 i2c_smbus_write_byte_data(client, reg[nr].low,
824 data->temp11[index] & 0xff);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +0200825 lm90_select_remote_channel(client, data, 0);
826
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100827 mutex_unlock(&data->update_lock);
Jean Delvare30d73942005-06-05 21:27:28 +0200828 return count;
829}
830
Guenter Roeck11e57812010-10-28 20:31:42 +0200831static ssize_t show_temphyst(struct device *dev,
832 struct device_attribute *devattr,
Jean Delvare30d73942005-06-05 21:27:28 +0200833 char *buf)
834{
835 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
836 struct lm90_data *data = lm90_update_device(dev);
Nate Case23b2d472008-10-17 17:51:10 +0200837 int temp;
838
839 if (data->kind == adt7461)
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200840 temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
Jean Delvareec38fa22008-10-26 17:04:39 +0100841 else if (data->kind == max6646)
842 temp = temp_from_u8(data->temp8[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200843 else
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200844 temp = temp_from_s8(data->temp8[attr->index]);
Nate Case23b2d472008-10-17 17:51:10 +0200845
Jean Delvare97ae60b2008-10-26 17:04:39 +0100846 /* +16 degrees offset for temp2 for the LM99 */
847 if (data->kind == lm99 && attr->index == 3)
848 temp += 16000;
849
Ben Hutchings9d4d3832008-10-17 17:51:10 +0200850 return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
Jean Delvare30d73942005-06-05 21:27:28 +0200851}
852
853static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
854 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855{
856 struct i2c_client *client = to_i2c_client(dev);
857 struct lm90_data *data = i2c_get_clientdata(client);
Guenter Roeck11e57812010-10-28 20:31:42 +0200858 long val;
859 int err;
Jean Delvareec38fa22008-10-26 17:04:39 +0100860 int temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100862 err = kstrtol(buf, 10, &val);
Guenter Roeck11e57812010-10-28 20:31:42 +0200863 if (err < 0)
864 return err;
865
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100866 mutex_lock(&data->update_lock);
Jean Delvareec38fa22008-10-26 17:04:39 +0100867 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
Jean Delvareec38fa22008-10-26 17:04:39 +0100876 data->temp_hyst);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100877 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 return count;
879}
880
Jean Delvare30d73942005-06-05 21:27:28 +0200881static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
882 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883{
884 struct lm90_data *data = lm90_update_device(dev);
885 return sprintf(buf, "%d\n", data->alarms);
886}
887
Jean Delvare2d457712006-09-24 20:52:15 +0200888static 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
Guenter Roeck0c01b642010-10-28 20:31:44 +0200898static 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
906static 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
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100915 err = kstrtoul(buf, 10, &val);
Guenter Roeck0c01b642010-10-28 20:31:44 +0200916 if (err)
917 return err;
918
919 mutex_lock(&data->update_lock);
Guenter Roeck6b101112012-01-16 22:51:47 +0100920 lm90_set_convrate(client, data, SENSORS_LIMIT(val, 0, 100000));
Guenter Roeck0c01b642010-10-28 20:31:44 +0200921 mutex_unlock(&data->update_lock);
922
923 return count;
924}
925
Guenter Roeck96512862010-10-28 20:31:43 +0200926static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4);
927static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0);
Jean Delvare30d73942005-06-05 21:27:28 +0200928static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
Jean Delvaref65e1702008-10-17 17:51:09 +0200929 set_temp8, 0);
Guenter Roeck96512862010-10-28 20:31:43 +0200930static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
931 set_temp11, 0, 1);
Jean Delvare30d73942005-06-05 21:27:28 +0200932static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
Jean Delvaref65e1702008-10-17 17:51:09 +0200933 set_temp8, 1);
Guenter Roeck96512862010-10-28 20:31:43 +0200934static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
935 set_temp11, 1, 2);
Jean Delvare30d73942005-06-05 21:27:28 +0200936static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
Jean Delvaref65e1702008-10-17 17:51:09 +0200937 set_temp8, 2);
Jean Delvare30d73942005-06-05 21:27:28 +0200938static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
Jean Delvaref65e1702008-10-17 17:51:09 +0200939 set_temp8, 3);
Jean Delvare30d73942005-06-05 21:27:28 +0200940static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
Jean Delvaref65e1702008-10-17 17:51:09 +0200941 set_temphyst, 2);
942static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
Guenter Roeck96512862010-10-28 20:31:43 +0200943static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
944 set_temp11, 2, 3);
Jean Delvare2d457712006-09-24 20:52:15 +0200945
946/* Individual alarm files */
947static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
948static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
Jean Delvare7817a392007-06-09 10:11:16 -0400949static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
Jean Delvare2d457712006-09-24 20:52:15 +0200950static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
951static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
952static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
953static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
954/* Raw alarm file for compatibility */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
956
Guenter Roeck0c01b642010-10-28 20:31:44 +0200957static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
958 set_update_interval);
959
Jean Delvare0e39e012006-09-24 21:16:40 +0200960static 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,
Jean Delvare7817a392007-06-09 10:11:16 -0400974 &sensor_dev_attr_temp2_fault.dev_attr.attr,
Jean Delvare0e39e012006-09-24 21:16:40 +0200975 &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,
Guenter Roeck0c01b642010-10-28 20:31:44 +0200980 &dev_attr_update_interval.attr,
Jean Delvare0e39e012006-09-24 21:16:40 +0200981 NULL
982};
983
984static const struct attribute_group lm90_group = {
985 .attrs = lm90_attributes,
986};
987
Guenter Roeck69487082010-10-28 20:31:43 +0200988/*
989 * Additional attributes for devices with emergency sensors
990 */
991static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
992 set_temp8, 4);
993static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
994 set_temp8, 5);
995static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
996 NULL, 4);
997static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
998 NULL, 5);
999
1000static 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
1008static const struct attribute_group lm90_emergency_group = {
1009 .attrs = lm90_emergency_attributes,
1010};
1011
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001012static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
1013static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
1014
1015static 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
1021static 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 */
1028static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5);
1029static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
1030 set_temp11, 3, 6);
1031static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
1032 set_temp11, 4, 7);
1033static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
1034 set_temp8, 6);
1035static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6);
1036static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
1037 set_temp8, 7);
1038static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
1039 NULL, 7);
1040
1041static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
1042static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
1043static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
1044static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
1045static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
1046
1047static 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
1064static const struct attribute_group lm90_temp3_group = {
1065 .attrs = lm90_temp3_attributes,
1066};
1067
Jean Delvarec3df5802005-10-26 21:39:40 +02001068/* pec used for ADM1032 only */
1069static 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
1076static 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);
Guenter Roeck11e57812010-10-28 20:31:42 +02001080 long val;
1081 int err;
1082
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +01001083 err = kstrtol(buf, 10, &val);
Guenter Roeck11e57812010-10-28 20:31:42 +02001084 if (err < 0)
1085 return err;
Jean Delvarec3df5802005-10-26 21:39:40 +02001086
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
1101static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
1102
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103/*
1104 * Real code
1105 */
1106
Jean Delvare9b0e8522008-07-16 19:30:15 +02001107/* Return 0 if detection is successful, -ENODEV otherwise */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001108static int lm90_detect(struct i2c_client *client,
Jean Delvare9b0e8522008-07-16 19:30:15 +02001109 struct i2c_board_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110{
Jean Delvareb2589ab2011-11-04 12:00:47 +01001111 struct i2c_adapter *adapter = client->adapter;
1112 int address = client->addr;
Jean Delvare8f2fa772009-12-09 20:35:53 +01001113 const char *name = NULL;
Jean Delvareb2589ab2011-11-04 12:00:47 +01001114 int man_id, chip_id, config1, config2, convrate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
1116 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Jean Delvare9b0e8522008-07-16 19:30:15 +02001117 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
Jean Delvare8f2fa772009-12-09 20:35:53 +01001119 /* detection and identification */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001120 man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
1121 chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
1122 config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
1123 convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
1124 if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
Jean Delvare8f2fa772009-12-09 20:35:53 +01001125 return -ENODEV;
1126
Jean Delvaref90be422011-07-24 20:37:05 +02001127 if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
Jean Delvareb2589ab2011-11-04 12:00:47 +01001128 config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
1129 if (config2 < 0)
Jean Delvare9b0e8522008-07-16 19:30:15 +02001130 return -ENODEV;
Jean Delvaref90be422011-07-24 20:37:05 +02001131 } else
Jean Delvareb2589ab2011-11-04 12:00:47 +01001132 config2 = 0; /* Make compiler happy */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
Jean Delvaref90be422011-07-24 20:37:05 +02001134 if ((address == 0x4C || address == 0x4D)
1135 && man_id == 0x01) { /* National Semiconductor */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001136 if ((config1 & 0x2A) == 0x00
1137 && (config2 & 0xF8) == 0x00
1138 && convrate <= 0x09) {
Jean Delvare8f2fa772009-12-09 20:35:53 +01001139 if (address == 0x4C
1140 && (chip_id & 0xF0) == 0x20) { /* LM90 */
1141 name = "lm90";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 } else
Jean Delvare8f2fa772009-12-09 20:35:53 +01001143 if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
1144 name = "lm99";
1145 dev_info(&adapter->dev,
1146 "Assuming LM99 chip at 0x%02x\n",
1147 address);
1148 dev_info(&adapter->dev,
1149 "If it is an LM89, instantiate it "
1150 "with the new_device sysfs "
1151 "interface\n");
Rainer Birkenmaier32c82a92007-06-09 10:11:16 -04001152 } else
Jean Delvare8f2fa772009-12-09 20:35:53 +01001153 if (address == 0x4C
1154 && (chip_id & 0xF0) == 0x10) { /* LM86 */
1155 name = "lm86";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 }
1157 }
Jean Delvare8f2fa772009-12-09 20:35:53 +01001158 } else
1159 if ((address == 0x4C || address == 0x4D)
1160 && man_id == 0x41) { /* Analog Devices */
1161 if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001162 && (config1 & 0x3F) == 0x00
1163 && convrate <= 0x0A) {
Jean Delvare8f2fa772009-12-09 20:35:53 +01001164 name = "adm1032";
1165 /* The ADM1032 supports PEC, but only if combined
1166 transactions are not used. */
1167 if (i2c_check_functionality(adapter,
1168 I2C_FUNC_SMBUS_BYTE))
1169 info->flags |= I2C_CLIENT_PEC;
1170 } else
1171 if (chip_id == 0x51 /* ADT7461 */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001172 && (config1 & 0x1B) == 0x00
1173 && convrate <= 0x0A) {
Jean Delvare8f2fa772009-12-09 20:35:53 +01001174 name = "adt7461";
Guenter Roeck5a4e5e62011-04-29 16:33:35 +02001175 } else
1176 if (chip_id == 0x57 /* ADT7461A, NCT1008 */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001177 && (config1 & 0x1B) == 0x00
1178 && convrate <= 0x0A) {
Guenter Roeck5a4e5e62011-04-29 16:33:35 +02001179 name = "adt7461a";
Jean Delvare8f2fa772009-12-09 20:35:53 +01001180 }
1181 } else
1182 if (man_id == 0x4D) { /* Maxim */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001183 int emerg, emerg2, status2;
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001184
1185 /*
1186 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
1187 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
1188 * exists, both readings will reflect the same value. Otherwise,
1189 * the readings will be different.
1190 */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001191 emerg = i2c_smbus_read_byte_data(client,
1192 MAX6659_REG_R_REMOTE_EMERG);
1193 man_id = i2c_smbus_read_byte_data(client,
Jean Delvare8dc089d2011-11-04 12:00:46 +01001194 LM90_REG_R_MAN_ID);
Jean Delvareb2589ab2011-11-04 12:00:47 +01001195 emerg2 = i2c_smbus_read_byte_data(client,
Jean Delvare8dc089d2011-11-04 12:00:46 +01001196 MAX6659_REG_R_REMOTE_EMERG);
Jean Delvareb2589ab2011-11-04 12:00:47 +01001197 status2 = i2c_smbus_read_byte_data(client,
1198 MAX6696_REG_R_STATUS2);
1199 if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001200 return -ENODEV;
1201
Jean Delvare8f2fa772009-12-09 20:35:53 +01001202 /*
1203 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
1204 * register. Reading from that address will return the last
1205 * read value, which in our case is those of the man_id
1206 * register. Likewise, the config1 register seems to lack a
1207 * low nibble, so the value will be those of the previous
1208 * read, so in our case those of the man_id register.
Guenter Roeck13c84952010-10-28 20:31:43 +02001209 * MAX6659 has a third set of upper temperature limit registers.
1210 * Those registers also return values on MAX6657 and MAX6658,
1211 * thus the only way to detect MAX6659 is by its address.
1212 * For this reason it will be mis-detected as MAX6657 if its
1213 * address is 0x4C.
Jean Delvare8f2fa772009-12-09 20:35:53 +01001214 */
1215 if (chip_id == man_id
Guenter Roeck13c84952010-10-28 20:31:43 +02001216 && (address == 0x4C || address == 0x4D || address == 0x4E)
Jean Delvareb2589ab2011-11-04 12:00:47 +01001217 && (config1 & 0x1F) == (man_id & 0x0F)
1218 && convrate <= 0x09) {
Guenter Roeck13c84952010-10-28 20:31:43 +02001219 if (address == 0x4C)
1220 name = "max6657";
1221 else
1222 name = "max6659";
Jean Delvare8f2fa772009-12-09 20:35:53 +01001223 } else
1224 /*
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001225 * Even though MAX6695 and MAX6696 do not have a chip ID
1226 * register, reading it returns 0x01. Bit 4 of the config1
1227 * register is unused and should return zero when read. Bit 0 of
1228 * the status2 register is unused and should return zero when
1229 * read.
1230 *
1231 * MAX6695 and MAX6696 have an additional set of temperature
1232 * limit registers. We can detect those chips by checking if
1233 * one of those registers exists.
1234 */
1235 if (chip_id == 0x01
Jean Delvareb2589ab2011-11-04 12:00:47 +01001236 && (config1 & 0x10) == 0x00
1237 && (status2 & 0x01) == 0x00
1238 && emerg == emerg2
1239 && convrate <= 0x07) {
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001240 name = "max6696";
1241 } else
1242 /*
Jean Delvare8f2fa772009-12-09 20:35:53 +01001243 * The chip_id register of the MAX6680 and MAX6681 holds the
1244 * revision of the chip. The lowest bit of the config1 register
1245 * is unused and should return zero when read, so should the
1246 * second to last bit of config1 (software reset).
1247 */
1248 if (chip_id == 0x01
Jean Delvareb2589ab2011-11-04 12:00:47 +01001249 && (config1 & 0x03) == 0x00
1250 && convrate <= 0x07) {
Jean Delvare8f2fa772009-12-09 20:35:53 +01001251 name = "max6680";
1252 } else
1253 /*
1254 * The chip_id register of the MAX6646/6647/6649 holds the
1255 * revision of the chip. The lowest 6 bits of the config1
1256 * register are unused and should return zero when read.
1257 */
1258 if (chip_id == 0x59
Jean Delvareb2589ab2011-11-04 12:00:47 +01001259 && (config1 & 0x3f) == 0x00
1260 && convrate <= 0x07) {
Jean Delvare8f2fa772009-12-09 20:35:53 +01001261 name = "max6646";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 }
Jean Delvare6771ea12010-03-05 22:17:13 +01001263 } else
1264 if (address == 0x4C
1265 && man_id == 0x5C) { /* Winbond/Nuvoton */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001266 if ((config1 & 0x2A) == 0x00
1267 && (config2 & 0xF8) == 0x00) {
Jean Delvarec4f99a22010-10-28 20:31:44 +02001268 if (chip_id == 0x01 /* W83L771W/G */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001269 && convrate <= 0x09) {
Jean Delvarec4f99a22010-10-28 20:31:44 +02001270 name = "w83l771";
1271 } else
1272 if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001273 && convrate <= 0x08) {
Jean Delvarec4f99a22010-10-28 20:31:44 +02001274 name = "w83l771";
1275 }
Jean Delvare6771ea12010-03-05 22:17:13 +01001276 }
Stijn Devriendt2ef01792011-06-06 10:40:45 +00001277 } else
Jean Delvare6d101c52011-07-24 20:36:15 +02001278 if (address >= 0x48 && address <= 0x4F
1279 && man_id == 0xA1) { /* NXP Semiconductor/Philips */
Jean Delvare6d101c52011-07-24 20:36:15 +02001280 if (chip_id == 0x00
Jean Delvareb2589ab2011-11-04 12:00:47 +01001281 && (config1 & 0x2A) == 0x00
1282 && (config2 & 0xFE) == 0x00
1283 && convrate <= 0x09) {
Stijn Devriendt2ef01792011-06-06 10:40:45 +00001284 name = "sa56004";
1285 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 }
1287
Jean Delvare8f2fa772009-12-09 20:35:53 +01001288 if (!name) { /* identification failed */
1289 dev_dbg(&adapter->dev,
1290 "Unsupported chip at 0x%02x (man_id=0x%02X, "
1291 "chip_id=0x%02X)\n", address, man_id, chip_id);
1292 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 }
Jean Delvare8f2fa772009-12-09 20:35:53 +01001294
Jean Delvare9b0e8522008-07-16 19:30:15 +02001295 strlcpy(info->type, name, I2C_NAME_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296
Jean Delvare9b0e8522008-07-16 19:30:15 +02001297 return 0;
1298}
1299
Guenter Roeckb6fc1ba2010-10-28 20:31:43 +02001300static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
1301{
Jean Delvareb2589ab2011-11-04 12:00:47 +01001302 struct device *dev = &client->dev;
1303
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001304 if (data->flags & LM90_HAVE_TEMP3)
Jean Delvareb2589ab2011-11-04 12:00:47 +01001305 sysfs_remove_group(&dev->kobj, &lm90_temp3_group);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001306 if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
Jean Delvareb2589ab2011-11-04 12:00:47 +01001307 sysfs_remove_group(&dev->kobj, &lm90_emergency_alarm_group);
Guenter Roeck69487082010-10-28 20:31:43 +02001308 if (data->flags & LM90_HAVE_EMERGENCY)
Jean Delvareb2589ab2011-11-04 12:00:47 +01001309 sysfs_remove_group(&dev->kobj, &lm90_emergency_group);
Guenter Roeckb6fc1ba2010-10-28 20:31:43 +02001310 if (data->flags & LM90_HAVE_OFFSET)
Jean Delvareb2589ab2011-11-04 12:00:47 +01001311 device_remove_file(dev, &sensor_dev_attr_temp2_offset.dev_attr);
1312 device_remove_file(dev, &dev_attr_pec);
1313 sysfs_remove_group(&dev->kobj, &lm90_group);
Guenter Roeckb6fc1ba2010-10-28 20:31:43 +02001314}
1315
Guenter Roeck15b66ab2010-10-28 20:31:43 +02001316static void lm90_init_client(struct i2c_client *client)
1317{
Guenter Roeck0c01b642010-10-28 20:31:44 +02001318 u8 config, convrate;
Guenter Roeck15b66ab2010-10-28 20:31:43 +02001319 struct lm90_data *data = i2c_get_clientdata(client);
1320
Guenter Roeck0c01b642010-10-28 20:31:44 +02001321 if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
1322 dev_warn(&client->dev, "Failed to read convrate register!\n");
1323 convrate = LM90_DEF_CONVRATE_RVAL;
1324 }
1325 data->convrate_orig = convrate;
1326
Guenter Roeck15b66ab2010-10-28 20:31:43 +02001327 /*
1328 * Start the conversions.
1329 */
Guenter Roeck0c01b642010-10-28 20:31:44 +02001330 lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
Guenter Roeck15b66ab2010-10-28 20:31:43 +02001331 if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
1332 dev_warn(&client->dev, "Initialization failed!\n");
1333 return;
1334 }
1335 data->config_orig = config;
1336
1337 /* Check Temperature Range Select */
1338 if (data->kind == adt7461) {
1339 if (config & 0x04)
1340 data->flags |= LM90_FLAG_ADT7461_EXT;
1341 }
1342
1343 /*
1344 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
1345 * 0.125 degree resolution) and range (0x08, extend range
1346 * to -64 degree) mode for the remote temperature sensor.
1347 */
1348 if (data->kind == max6680)
1349 config |= 0x18;
1350
1351 /*
1352 * Select external channel 0 for max6695/96
1353 */
1354 if (data->kind == max6696)
1355 config &= ~0x08;
1356
1357 config &= 0xBF; /* run */
1358 if (config != data->config_orig) /* Only write if changed */
1359 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
1360}
1361
Jean Delvareb2589ab2011-11-04 12:00:47 +01001362static int lm90_probe(struct i2c_client *client,
Jean Delvare9b0e8522008-07-16 19:30:15 +02001363 const struct i2c_device_id *id)
1364{
Jean Delvareb2589ab2011-11-04 12:00:47 +01001365 struct device *dev = &client->dev;
1366 struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
Jean Delvare9b0e8522008-07-16 19:30:15 +02001367 struct lm90_data *data;
1368 int err;
1369
1370 data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL);
1371 if (!data) {
1372 err = -ENOMEM;
1373 goto exit;
1374 }
Jean Delvareb2589ab2011-11-04 12:00:47 +01001375 i2c_set_clientdata(client, data);
Ingo Molnar9a61bf62006-01-18 23:19:26 +01001376 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Jean Delvare9b0e8522008-07-16 19:30:15 +02001378 /* Set the device type */
1379 data->kind = id->driver_data;
1380 if (data->kind == adm1032) {
1381 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
Jean Delvareb2589ab2011-11-04 12:00:47 +01001382 client->flags &= ~I2C_CLIENT_PEC;
Jean Delvare9b0e8522008-07-16 19:30:15 +02001383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
Jean Delvare53de3342010-03-05 22:17:15 +01001385 /* Different devices have different alarm bits triggering the
1386 * ALERT# output */
Guenter Roeck4667bcb2010-10-28 20:31:43 +02001387 data->alert_alarms = lm90_params[data->kind].alert_alarms;
Jean Delvare53de3342010-03-05 22:17:15 +01001388
Guenter Roeck88073bb2010-10-28 20:31:43 +02001389 /* Set chip capabilities */
Guenter Roeck4667bcb2010-10-28 20:31:43 +02001390 data->flags = lm90_params[data->kind].flags;
Jean Delvarea095f682011-07-27 23:22:25 -07001391 data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001392
Guenter Roeck0c01b642010-10-28 20:31:44 +02001393 /* Set maximum conversion rate */
1394 data->max_convrate = lm90_params[data->kind].max_convrate;
1395
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 /* Initialize the LM90 chip */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001397 lm90_init_client(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
1399 /* Register sysfs hooks */
Jean Delvareb2589ab2011-11-04 12:00:47 +01001400 err = sysfs_create_group(&dev->kobj, &lm90_group);
Guenter Roeck11e57812010-10-28 20:31:42 +02001401 if (err)
Jean Delvare9b0e8522008-07-16 19:30:15 +02001402 goto exit_free;
Jean Delvareb2589ab2011-11-04 12:00:47 +01001403 if (client->flags & I2C_CLIENT_PEC) {
1404 err = device_create_file(dev, &dev_attr_pec);
Guenter Roeck11e57812010-10-28 20:31:42 +02001405 if (err)
Jean Delvare0e39e012006-09-24 21:16:40 +02001406 goto exit_remove_files;
1407 }
Guenter Roeck88073bb2010-10-28 20:31:43 +02001408 if (data->flags & LM90_HAVE_OFFSET) {
Jean Delvareb2589ab2011-11-04 12:00:47 +01001409 err = device_create_file(dev,
Guenter Roeck11e57812010-10-28 20:31:42 +02001410 &sensor_dev_attr_temp2_offset.dev_attr);
1411 if (err)
Jean Delvare69f2f962007-09-05 14:15:37 +02001412 goto exit_remove_files;
1413 }
Guenter Roeck69487082010-10-28 20:31:43 +02001414 if (data->flags & LM90_HAVE_EMERGENCY) {
Jean Delvareb2589ab2011-11-04 12:00:47 +01001415 err = sysfs_create_group(&dev->kobj, &lm90_emergency_group);
Guenter Roeck69487082010-10-28 20:31:43 +02001416 if (err)
1417 goto exit_remove_files;
1418 }
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001419 if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
Jean Delvareb2589ab2011-11-04 12:00:47 +01001420 err = sysfs_create_group(&dev->kobj,
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001421 &lm90_emergency_alarm_group);
1422 if (err)
1423 goto exit_remove_files;
1424 }
1425 if (data->flags & LM90_HAVE_TEMP3) {
Jean Delvareb2589ab2011-11-04 12:00:47 +01001426 err = sysfs_create_group(&dev->kobj, &lm90_temp3_group);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001427 if (err)
1428 goto exit_remove_files;
1429 }
Jean Delvare0e39e012006-09-24 21:16:40 +02001430
Jean Delvareb2589ab2011-11-04 12:00:47 +01001431 data->hwmon_dev = hwmon_device_register(dev);
Tony Jones1beeffe2007-08-20 13:46:20 -07001432 if (IS_ERR(data->hwmon_dev)) {
1433 err = PTR_ERR(data->hwmon_dev);
Jean Delvare0e39e012006-09-24 21:16:40 +02001434 goto exit_remove_files;
Mark M. Hoffman943b0832005-07-15 21:39:18 -04001435 }
1436
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 return 0;
1438
Jean Delvare0e39e012006-09-24 21:16:40 +02001439exit_remove_files:
Jean Delvareb2589ab2011-11-04 12:00:47 +01001440 lm90_remove_files(client, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441exit_free:
1442 kfree(data);
1443exit:
1444 return err;
1445}
1446
Jean Delvare9b0e8522008-07-16 19:30:15 +02001447static int lm90_remove(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448{
Mark M. Hoffman943b0832005-07-15 21:39:18 -04001449 struct lm90_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Tony Jones1beeffe2007-08-20 13:46:20 -07001451 hwmon_device_unregister(data->hwmon_dev);
Guenter Roeckb6fc1ba2010-10-28 20:31:43 +02001452 lm90_remove_files(client, data);
Mark M. Hoffman943b0832005-07-15 21:39:18 -04001453
Jean Delvare95238362010-03-05 22:17:14 +01001454 /* Restore initial configuration */
Guenter Roeck0c01b642010-10-28 20:31:44 +02001455 i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
1456 data->convrate_orig);
Jean Delvare95238362010-03-05 22:17:14 +01001457 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1458 data->config_orig);
1459
Mark M. Hoffman943b0832005-07-15 21:39:18 -04001460 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 return 0;
1462}
1463
Jean Delvare53de3342010-03-05 22:17:15 +01001464static void lm90_alert(struct i2c_client *client, unsigned int flag)
1465{
1466 struct lm90_data *data = i2c_get_clientdata(client);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001467 u8 config, alarms, alarms2 = 0;
Jean Delvare53de3342010-03-05 22:17:15 +01001468
1469 lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001470
1471 if (data->kind == max6696)
1472 lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
1473
1474 if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
Jean Delvare53de3342010-03-05 22:17:15 +01001475 dev_info(&client->dev, "Everything OK\n");
1476 } else {
1477 if (alarms & 0x61)
1478 dev_warn(&client->dev,
1479 "temp%d out of range, please check!\n", 1);
1480 if (alarms & 0x1a)
1481 dev_warn(&client->dev,
1482 "temp%d out of range, please check!\n", 2);
1483 if (alarms & 0x04)
1484 dev_warn(&client->dev,
1485 "temp%d diode open, please check!\n", 2);
1486
Guenter Roeck06e1c0a2010-10-28 20:31:43 +02001487 if (alarms2 & 0x18)
1488 dev_warn(&client->dev,
1489 "temp%d out of range, please check!\n", 3);
1490
Jean Delvare53de3342010-03-05 22:17:15 +01001491 /* Disable ALERT# output, because these chips don't implement
1492 SMBus alert correctly; they should only hold the alert line
1493 low briefly. */
Guenter Roeck11793242010-10-28 20:31:44 +02001494 if ((data->flags & LM90_HAVE_BROKEN_ALERT)
Jean Delvare53de3342010-03-05 22:17:15 +01001495 && (alarms & data->alert_alarms)) {
1496 dev_dbg(&client->dev, "Disabling ALERT#\n");
1497 lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
1498 i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
1499 config | 0x80);
1500 }
1501 }
1502}
1503
Guenter Roeck15b66ab2010-10-28 20:31:43 +02001504static struct i2c_driver lm90_driver = {
1505 .class = I2C_CLASS_HWMON,
1506 .driver = {
1507 .name = "lm90",
1508 },
1509 .probe = lm90_probe,
1510 .remove = lm90_remove,
1511 .alert = lm90_alert,
1512 .id_table = lm90_id,
1513 .detect = lm90_detect,
1514 .address_list = normal_i2c,
1515};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516
1517static int __init sensors_lm90_init(void)
1518{
1519 return i2c_add_driver(&lm90_driver);
1520}
1521
1522static void __exit sensors_lm90_exit(void)
1523{
1524 i2c_del_driver(&lm90_driver);
1525}
1526
1527MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1528MODULE_DESCRIPTION("LM90/ADM1032 driver");
1529MODULE_LICENSE("GPL");
1530
1531module_init(sensors_lm90_init);
1532module_exit(sensors_lm90_exit);