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Hans de Goedeab2b79d2009-06-15 18:39:46 +02001/* tmp401.c
2 *
3 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
Andre Prendelfce07582009-06-15 18:39:47 +02004 * Preliminary tmp411 support by:
5 * Gabriel Konat, Sander Leget, Wouter Willems
6 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
Hans de Goedeab2b79d2009-06-15 18:39:46 +02007 *
Guenter Roeck29dd3b62013-03-28 01:36:44 -07008 * Cleanup and support for TMP431 and TMP432 by Guenter Roeck
9 * Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
10 *
Hans de Goedeab2b79d2009-06-15 18:39:46 +020011 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26/*
27 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
28 *
29 * Note this IC is in some aspect similar to the LM90, but it has quite a
30 * few differences too, for example the local temp has a higher resolution
31 * and thus has 16 bits registers for its value and limit instead of 8 bits.
32 */
33
34#include <linux/module.h>
35#include <linux/init.h>
Guenter Roeck947e9272013-03-27 08:48:03 -070036#include <linux/bitops.h>
Hans de Goedeab2b79d2009-06-15 18:39:46 +020037#include <linux/slab.h>
38#include <linux/jiffies.h>
39#include <linux/i2c.h>
40#include <linux/hwmon.h>
41#include <linux/hwmon-sysfs.h>
42#include <linux/err.h>
43#include <linux/mutex.h>
44#include <linux/sysfs.h>
45
46/* Addresses to scan */
Guenter Roecka1fac922013-03-15 12:55:08 -070047static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
Hans de Goedeab2b79d2009-06-15 18:39:46 +020048
Guenter Roeck29dd3b62013-03-28 01:36:44 -070049enum chips { tmp401, tmp411, tmp431, tmp432 };
Hans de Goedeab2b79d2009-06-15 18:39:46 +020050
51/*
52 * The TMP401 registers, note some registers have different addresses for
53 * reading and writing
54 */
55#define TMP401_STATUS 0x02
56#define TMP401_CONFIG_READ 0x03
57#define TMP401_CONFIG_WRITE 0x09
58#define TMP401_CONVERSION_RATE_READ 0x04
59#define TMP401_CONVERSION_RATE_WRITE 0x0A
60#define TMP401_TEMP_CRIT_HYST 0x21
Hans de Goedeab2b79d2009-06-15 18:39:46 +020061#define TMP401_MANUFACTURER_ID_REG 0xFE
62#define TMP401_DEVICE_ID_REG 0xFF
63
Guenter Roeck14f2a662013-03-27 21:23:10 -070064static const u8 TMP401_TEMP_MSB_READ[6][2] = {
65 { 0x00, 0x01 }, /* temp */
66 { 0x06, 0x08 }, /* low limit */
67 { 0x05, 0x07 }, /* high limit */
68 { 0x20, 0x19 }, /* therm (crit) limit */
69 { 0x30, 0x34 }, /* lowest */
70 { 0x32, 0x36 }, /* highest */
71};
Hans de Goedeab2b79d2009-06-15 18:39:46 +020072
Guenter Roeck14f2a662013-03-27 21:23:10 -070073static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
74 { 0, 0 }, /* temp (unused) */
75 { 0x0C, 0x0E }, /* low limit */
76 { 0x0B, 0x0D }, /* high limit */
77 { 0x20, 0x19 }, /* therm (crit) limit */
78 { 0x30, 0x34 }, /* lowest */
79 { 0x32, 0x36 }, /* highest */
80};
81
82static const u8 TMP401_TEMP_LSB[6][2] = {
83 { 0x15, 0x10 }, /* temp */
84 { 0x17, 0x14 }, /* low limit */
85 { 0x16, 0x13 }, /* high limit */
86 { 0, 0 }, /* therm (crit) limit (unused) */
87 { 0x31, 0x35 }, /* lowest */
88 { 0x33, 0x37 }, /* highest */
89};
Andre Prendelfce07582009-06-15 18:39:47 +020090
Guenter Roeck29dd3b62013-03-28 01:36:44 -070091static const u8 TMP432_TEMP_MSB_READ[4][3] = {
92 { 0x00, 0x01, 0x23 }, /* temp */
93 { 0x06, 0x08, 0x16 }, /* low limit */
94 { 0x05, 0x07, 0x15 }, /* high limit */
95 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
96};
97
98static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
99 { 0, 0, 0 }, /* temp - unused */
100 { 0x0C, 0x0E, 0x16 }, /* low limit */
101 { 0x0B, 0x0D, 0x15 }, /* high limit */
102 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
103};
104
105static const u8 TMP432_TEMP_LSB[3][3] = {
106 { 0x29, 0x10, 0x24 }, /* temp */
107 { 0x3E, 0x14, 0x18 }, /* low limit */
108 { 0x3D, 0x13, 0x17 }, /* high limit */
109};
110
111/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
112static const u8 TMP432_STATUS_REG[] = {
113 0x1b, 0x36, 0x35, 0x37 };
114
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200115/* Flags */
Guenter Roeck947e9272013-03-27 08:48:03 -0700116#define TMP401_CONFIG_RANGE BIT(2)
117#define TMP401_CONFIG_SHUTDOWN BIT(6)
118#define TMP401_STATUS_LOCAL_CRIT BIT(0)
119#define TMP401_STATUS_REMOTE_CRIT BIT(1)
120#define TMP401_STATUS_REMOTE_OPEN BIT(2)
121#define TMP401_STATUS_REMOTE_LOW BIT(3)
122#define TMP401_STATUS_REMOTE_HIGH BIT(4)
123#define TMP401_STATUS_LOCAL_LOW BIT(5)
124#define TMP401_STATUS_LOCAL_HIGH BIT(6)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200125
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700126/* On TMP432, each status has its own register */
127#define TMP432_STATUS_LOCAL BIT(0)
128#define TMP432_STATUS_REMOTE1 BIT(1)
129#define TMP432_STATUS_REMOTE2 BIT(2)
130
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200131/* Manufacturer / Device ID's */
132#define TMP401_MANUFACTURER_ID 0x55
133#define TMP401_DEVICE_ID 0x11
Guenter Roeck4ce5b1f2013-03-29 17:56:07 -0700134#define TMP411A_DEVICE_ID 0x12
135#define TMP411B_DEVICE_ID 0x13
136#define TMP411C_DEVICE_ID 0x10
Guenter Roecka1fac922013-03-15 12:55:08 -0700137#define TMP431_DEVICE_ID 0x31
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700138#define TMP432_DEVICE_ID 0x32
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200139
140/*
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200141 * Driver data (common to all clients)
142 */
143
144static const struct i2c_device_id tmp401_id[] = {
145 { "tmp401", tmp401 },
Andre Prendelfce07582009-06-15 18:39:47 +0200146 { "tmp411", tmp411 },
Guenter Roecka1fac922013-03-15 12:55:08 -0700147 { "tmp431", tmp431 },
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700148 { "tmp432", tmp432 },
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200149 { }
150};
151MODULE_DEVICE_TABLE(i2c, tmp401_id);
152
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200153/*
154 * Client data (each client gets its own)
155 */
156
157struct tmp401_data {
158 struct device *hwmon_dev;
159 struct mutex update_lock;
160 char valid; /* zero until following fields are valid */
161 unsigned long last_updated; /* in jiffies */
Jean Delvaredc71afe2010-03-05 22:17:26 +0100162 enum chips kind;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200163
Guenter Roeck0846e302013-03-28 02:03:10 -0700164 unsigned int update_interval; /* in milliseconds */
165
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200166 /* register values */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700167 u8 status[4];
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200168 u8 config;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700169 u16 temp[6][3];
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200170 u8 temp_crit_hyst;
171};
172
173/*
174 * Sysfs attr show / store functions
175 */
176
177static int tmp401_register_to_temp(u16 reg, u8 config)
178{
179 int temp = reg;
180
181 if (config & TMP401_CONFIG_RANGE)
182 temp -= 64 * 256;
183
Guenter Roeck14f2a662013-03-27 21:23:10 -0700184 return DIV_ROUND_CLOSEST(temp * 125, 32);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200185}
186
Guenter Roeck14f2a662013-03-27 21:23:10 -0700187static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200188{
189 if (config & TMP401_CONFIG_RANGE) {
Guenter Roeck2a844c12013-01-09 08:09:34 -0800190 temp = clamp_val(temp, -64000, 191000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200191 temp += 64000;
192 } else
Guenter Roeck2a844c12013-01-09 08:09:34 -0800193 temp = clamp_val(temp, 0, 127000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200194
Guenter Roeck14f2a662013-03-27 21:23:10 -0700195 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200196}
197
Guenter Roeck14f2a662013-03-27 21:23:10 -0700198static int tmp401_update_device_reg16(struct i2c_client *client,
199 struct tmp401_data *data)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200200{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700201 int i, j, val;
202 int num_regs = data->kind == tmp411 ? 6 : 4;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700203 int num_sensors = data->kind == tmp432 ? 3 : 2;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200204
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700205 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
Guenter Roeck14f2a662013-03-27 21:23:10 -0700206 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700207 u8 regaddr;
Guenter Roeck14f2a662013-03-27 21:23:10 -0700208 /*
209 * High byte must be read first immediately followed
210 * by the low byte
211 */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700212 regaddr = data->kind == tmp432 ?
213 TMP432_TEMP_MSB_READ[j][i] :
214 TMP401_TEMP_MSB_READ[j][i];
215 val = i2c_smbus_read_byte_data(client, regaddr);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700216 if (val < 0)
217 return val;
218 data->temp[j][i] = val << 8;
219 if (j == 3) /* crit is msb only */
220 continue;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700221 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
222 : TMP401_TEMP_LSB[j][i];
223 val = i2c_smbus_read_byte_data(client, regaddr);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700224 if (val < 0)
225 return val;
226 data->temp[j][i] |= val;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200227 }
228 }
Guenter Roeck14f2a662013-03-27 21:23:10 -0700229 return 0;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200230}
231
232static struct tmp401_data *tmp401_update_device(struct device *dev)
233{
234 struct i2c_client *client = to_i2c_client(dev);
235 struct tmp401_data *data = i2c_get_clientdata(client);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700236 struct tmp401_data *ret = data;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700237 int i, val;
Guenter Roeck0846e302013-03-28 02:03:10 -0700238 unsigned long next_update;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200239
240 mutex_lock(&data->update_lock);
241
Guenter Roeck0846e302013-03-28 02:03:10 -0700242 next_update = data->last_updated +
243 msecs_to_jiffies(data->update_interval) + 1;
244 if (time_after(jiffies, next_update) || !data->valid) {
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700245 if (data->kind != tmp432) {
246 /*
247 * The driver uses the TMP432 status format internally.
248 * Convert status to TMP432 format for other chips.
249 */
250 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
251 if (val < 0) {
252 ret = ERR_PTR(val);
253 goto abort;
254 }
255 data->status[0] =
256 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
257 data->status[1] =
258 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
259 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
260 data->status[2] =
261 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
262 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
263 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
264 | TMP401_STATUS_REMOTE_CRIT);
265 } else {
266 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
267 val = i2c_smbus_read_byte_data(client,
268 TMP432_STATUS_REG[i]);
269 if (val < 0) {
270 ret = ERR_PTR(val);
271 goto abort;
272 }
273 data->status[i] = val;
274 }
Guenter Roeck14f2a662013-03-27 21:23:10 -0700275 }
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700276
Guenter Roeck14f2a662013-03-27 21:23:10 -0700277 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
278 if (val < 0) {
279 ret = ERR_PTR(val);
280 goto abort;
281 }
282 data->config = val;
283 val = tmp401_update_device_reg16(client, data);
284 if (val < 0) {
285 ret = ERR_PTR(val);
286 goto abort;
287 }
288 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
289 if (val < 0) {
290 ret = ERR_PTR(val);
291 goto abort;
292 }
293 data->temp_crit_hyst = val;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200294
295 data->last_updated = jiffies;
296 data->valid = 1;
297 }
298
Guenter Roeck14f2a662013-03-27 21:23:10 -0700299abort:
Andre Prendelea63c2b2010-05-27 19:58:49 +0200300 mutex_unlock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700301 return ret;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200302}
303
Guenter Roeck14f2a662013-03-27 21:23:10 -0700304static ssize_t show_temp(struct device *dev,
305 struct device_attribute *devattr, char *buf)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200306{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700307 int nr = to_sensor_dev_attr_2(devattr)->nr;
308 int index = to_sensor_dev_attr_2(devattr)->index;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200309 struct tmp401_data *data = tmp401_update_device(dev);
310
Guenter Roeck14f2a662013-03-27 21:23:10 -0700311 if (IS_ERR(data))
312 return PTR_ERR(data);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200313
314 return sprintf(buf, "%d\n",
Guenter Roeck14f2a662013-03-27 21:23:10 -0700315 tmp401_register_to_temp(data->temp[nr][index], data->config));
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200316}
317
318static ssize_t show_temp_crit_hyst(struct device *dev,
319 struct device_attribute *devattr, char *buf)
320{
321 int temp, index = to_sensor_dev_attr(devattr)->index;
322 struct tmp401_data *data = tmp401_update_device(dev);
323
Guenter Roeck14f2a662013-03-27 21:23:10 -0700324 if (IS_ERR(data))
325 return PTR_ERR(data);
326
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200327 mutex_lock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700328 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200329 temp -= data->temp_crit_hyst * 1000;
330 mutex_unlock(&data->update_lock);
331
332 return sprintf(buf, "%d\n", temp);
333}
334
335static ssize_t show_status(struct device *dev,
336 struct device_attribute *devattr, char *buf)
337{
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700338 int nr = to_sensor_dev_attr_2(devattr)->nr;
339 int mask = to_sensor_dev_attr_2(devattr)->index;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200340 struct tmp401_data *data = tmp401_update_device(dev);
341
Guenter Roeck14f2a662013-03-27 21:23:10 -0700342 if (IS_ERR(data))
343 return PTR_ERR(data);
344
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700345 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200346}
347
Guenter Roeck14f2a662013-03-27 21:23:10 -0700348static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
349 const char *buf, size_t count)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200350{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700351 int nr = to_sensor_dev_attr_2(devattr)->nr;
352 int index = to_sensor_dev_attr_2(devattr)->index;
353 struct i2c_client *client = to_i2c_client(dev);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200354 struct tmp401_data *data = tmp401_update_device(dev);
355 long val;
356 u16 reg;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700357 u8 regaddr;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200358
Guenter Roeck14f2a662013-03-27 21:23:10 -0700359 if (IS_ERR(data))
360 return PTR_ERR(data);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200361
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100362 if (kstrtol(buf, 10, &val))
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200363 return -EINVAL;
364
Guenter Roeck14f2a662013-03-27 21:23:10 -0700365 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200366
367 mutex_lock(&data->update_lock);
368
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700369 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
370 : TMP401_TEMP_MSB_WRITE[nr][index];
371 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700372 if (nr != 3) {
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700373 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
374 : TMP401_TEMP_LSB[nr][index];
375 i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700376 }
377 data->temp[nr][index] = reg;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200378
379 mutex_unlock(&data->update_lock);
380
381 return count;
382}
383
384static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
385 *devattr, const char *buf, size_t count)
386{
387 int temp, index = to_sensor_dev_attr(devattr)->index;
388 struct tmp401_data *data = tmp401_update_device(dev);
389 long val;
390 u8 reg;
391
Guenter Roeck14f2a662013-03-27 21:23:10 -0700392 if (IS_ERR(data))
393 return PTR_ERR(data);
394
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100395 if (kstrtol(buf, 10, &val))
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200396 return -EINVAL;
397
398 if (data->config & TMP401_CONFIG_RANGE)
Guenter Roeck2a844c12013-01-09 08:09:34 -0800399 val = clamp_val(val, -64000, 191000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200400 else
Guenter Roeck2a844c12013-01-09 08:09:34 -0800401 val = clamp_val(val, 0, 127000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200402
403 mutex_lock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700404 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
Guenter Roeck2a844c12013-01-09 08:09:34 -0800405 val = clamp_val(val, temp - 255000, temp);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200406 reg = ((temp - val) + 500) / 1000;
407
Guenter Roeck14f2a662013-03-27 21:23:10 -0700408 i2c_smbus_write_byte_data(to_i2c_client(dev), TMP401_TEMP_CRIT_HYST,
409 reg);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200410
411 data->temp_crit_hyst = reg;
412
413 mutex_unlock(&data->update_lock);
414
415 return count;
416}
417
Andre Prendelfce07582009-06-15 18:39:47 +0200418/*
419 * Resets the historical measurements of minimum and maximum temperatures.
420 * This is done by writing any value to any of the minimum/maximum registers
421 * (0x30-0x37).
422 */
423static ssize_t reset_temp_history(struct device *dev,
424 struct device_attribute *devattr, const char *buf, size_t count)
425{
Guenter Roeck8eb6d902013-04-14 04:39:46 -0700426 struct i2c_client *client = to_i2c_client(dev);
427 struct tmp401_data *data = i2c_get_clientdata(client);
Andre Prendelfce07582009-06-15 18:39:47 +0200428 long val;
429
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100430 if (kstrtol(buf, 10, &val))
Andre Prendelfce07582009-06-15 18:39:47 +0200431 return -EINVAL;
432
433 if (val != 1) {
Guenter Roeckb55f3752013-01-10 10:01:24 -0800434 dev_err(dev,
435 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
436 val);
Andre Prendelfce07582009-06-15 18:39:47 +0200437 return -EINVAL;
438 }
Guenter Roeck8eb6d902013-04-14 04:39:46 -0700439 mutex_lock(&data->update_lock);
440 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
441 data->valid = 0;
442 mutex_unlock(&data->update_lock);
Andre Prendelfce07582009-06-15 18:39:47 +0200443
444 return count;
445}
446
Guenter Roeck0846e302013-03-28 02:03:10 -0700447static ssize_t show_update_interval(struct device *dev,
448 struct device_attribute *attr, char *buf)
449{
450 struct i2c_client *client = to_i2c_client(dev);
451 struct tmp401_data *data = i2c_get_clientdata(client);
452
453 return sprintf(buf, "%u\n", data->update_interval);
454}
455
456static ssize_t set_update_interval(struct device *dev,
457 struct device_attribute *attr,
458 const char *buf, size_t count)
459{
460 struct i2c_client *client = to_i2c_client(dev);
461 struct tmp401_data *data = i2c_get_clientdata(client);
462 unsigned long val;
463 int err, rate;
464
465 err = kstrtoul(buf, 10, &val);
466 if (err)
467 return err;
468
469 /*
470 * For valid rates, interval can be calculated as
471 * interval = (1 << (7 - rate)) * 125;
472 * Rounded rate is therefore
473 * rate = 7 - __fls(interval * 4 / (125 * 3));
474 * Use clamp_val() to avoid overflows, and to ensure valid input
475 * for __fls.
476 */
477 val = clamp_val(val, 125, 16000);
478 rate = 7 - __fls(val * 4 / (125 * 3));
479 mutex_lock(&data->update_lock);
480 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
481 data->update_interval = (1 << (7 - rate)) * 125;
482 mutex_unlock(&data->update_lock);
483
484 return count;
485}
486
Guenter Roeck14f2a662013-03-27 21:23:10 -0700487static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
488static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
489 store_temp, 1, 0);
490static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
491 store_temp, 2, 0);
492static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
493 store_temp, 3, 0);
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700494static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
495 show_temp_crit_hyst, store_temp_crit_hyst, 0);
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700496static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_status, NULL,
497 1, TMP432_STATUS_LOCAL);
498static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_status, NULL,
499 2, TMP432_STATUS_LOCAL);
500static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_status, NULL,
501 3, TMP432_STATUS_LOCAL);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700502static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
503static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
504 store_temp, 1, 1);
505static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
506 store_temp, 2, 1);
507static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
508 store_temp, 3, 1);
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700509static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
510 NULL, 1);
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700511static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_status, NULL,
512 0, TMP432_STATUS_REMOTE1);
513static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_status, NULL,
514 1, TMP432_STATUS_REMOTE1);
515static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_status, NULL,
516 2, TMP432_STATUS_REMOTE1);
517static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_status, NULL,
518 3, TMP432_STATUS_REMOTE1);
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700519
Guenter Roeck0846e302013-03-28 02:03:10 -0700520static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
521 set_update_interval);
522
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700523static struct attribute *tmp401_attributes[] = {
524 &sensor_dev_attr_temp1_input.dev_attr.attr,
525 &sensor_dev_attr_temp1_min.dev_attr.attr,
526 &sensor_dev_attr_temp1_max.dev_attr.attr,
527 &sensor_dev_attr_temp1_crit.dev_attr.attr,
528 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
529 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
530 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
531 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
532
533 &sensor_dev_attr_temp2_input.dev_attr.attr,
534 &sensor_dev_attr_temp2_min.dev_attr.attr,
535 &sensor_dev_attr_temp2_max.dev_attr.attr,
536 &sensor_dev_attr_temp2_crit.dev_attr.attr,
537 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
538 &sensor_dev_attr_temp2_fault.dev_attr.attr,
539 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
540 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
541 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
542
Guenter Roeck0846e302013-03-28 02:03:10 -0700543 &dev_attr_update_interval.attr,
544
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700545 NULL
546};
547
548static const struct attribute_group tmp401_group = {
549 .attrs = tmp401_attributes,
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200550};
551
552/*
Andre Prendelfce07582009-06-15 18:39:47 +0200553 * Additional features of the TMP411 chip.
554 * The TMP411 stores the minimum and maximum
555 * temperature measured since power-on, chip-reset, or
556 * minimum and maximum register reset for both the local
557 * and remote channels.
558 */
Guenter Roeck14f2a662013-03-27 21:23:10 -0700559static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
560static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
561static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
562static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700563static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
564 0);
565
566static struct attribute *tmp411_attributes[] = {
567 &sensor_dev_attr_temp1_highest.dev_attr.attr,
568 &sensor_dev_attr_temp1_lowest.dev_attr.attr,
569 &sensor_dev_attr_temp2_highest.dev_attr.attr,
570 &sensor_dev_attr_temp2_lowest.dev_attr.attr,
571 &sensor_dev_attr_temp_reset_history.dev_attr.attr,
572 NULL
573};
574
575static const struct attribute_group tmp411_group = {
576 .attrs = tmp411_attributes,
Andre Prendelfce07582009-06-15 18:39:47 +0200577};
578
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700579static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2);
580static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp,
581 store_temp, 1, 2);
582static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp,
583 store_temp, 2, 2);
584static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IWUSR | S_IRUGO, show_temp,
585 store_temp, 3, 2);
586static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst,
587 NULL, 2);
588static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_status, NULL,
589 0, TMP432_STATUS_REMOTE2);
590static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_status, NULL,
591 1, TMP432_STATUS_REMOTE2);
592static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_status, NULL,
593 2, TMP432_STATUS_REMOTE2);
594static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_status, NULL,
595 3, TMP432_STATUS_REMOTE2);
596
597static struct attribute *tmp432_attributes[] = {
598 &sensor_dev_attr_temp3_input.dev_attr.attr,
599 &sensor_dev_attr_temp3_min.dev_attr.attr,
600 &sensor_dev_attr_temp3_max.dev_attr.attr,
601 &sensor_dev_attr_temp3_crit.dev_attr.attr,
602 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
603 &sensor_dev_attr_temp3_fault.dev_attr.attr,
604 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
605 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
606 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
607
608 NULL
609};
610
611static const struct attribute_group tmp432_group = {
612 .attrs = tmp432_attributes,
613};
614
Andre Prendelfce07582009-06-15 18:39:47 +0200615/*
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200616 * Begin non sysfs callback code (aka Real code)
617 */
618
619static void tmp401_init_client(struct i2c_client *client)
620{
621 int config, config_orig;
Guenter Roeck0846e302013-03-28 02:03:10 -0700622 struct tmp401_data *data = i2c_get_clientdata(client);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200623
624 /* Set the conversion rate to 2 Hz */
625 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
Guenter Roeck0846e302013-03-28 02:03:10 -0700626 data->update_interval = 500;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200627
628 /* Start conversions (disable shutdown if necessary) */
629 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
630 if (config < 0) {
631 dev_warn(&client->dev, "Initialization failed!\n");
632 return;
633 }
634
635 config_orig = config;
636 config &= ~TMP401_CONFIG_SHUTDOWN;
637
638 if (config != config_orig)
639 i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
640}
641
Jean Delvare310ec792009-12-14 21:17:23 +0100642static int tmp401_detect(struct i2c_client *client,
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200643 struct i2c_board_info *info)
644{
Jean Delvaredbe73c82009-12-09 20:35:54 +0100645 enum chips kind;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200646 struct i2c_adapter *adapter = client->adapter;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100647 u8 reg;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200648
649 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
650 return -ENODEV;
651
652 /* Detect and identify the chip */
Jean Delvaredbe73c82009-12-09 20:35:54 +0100653 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
654 if (reg != TMP401_MANUFACTURER_ID)
655 return -ENODEV;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200656
Jean Delvaredbe73c82009-12-09 20:35:54 +0100657 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200658
Jean Delvaredbe73c82009-12-09 20:35:54 +0100659 switch (reg) {
660 case TMP401_DEVICE_ID:
Guenter Roecka1fac922013-03-15 12:55:08 -0700661 if (client->addr != 0x4c)
662 return -ENODEV;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100663 kind = tmp401;
664 break;
Guenter Roeck4ce5b1f2013-03-29 17:56:07 -0700665 case TMP411A_DEVICE_ID:
666 if (client->addr != 0x4c)
667 return -ENODEV;
668 kind = tmp411;
669 break;
670 case TMP411B_DEVICE_ID:
671 if (client->addr != 0x4d)
672 return -ENODEV;
673 kind = tmp411;
674 break;
675 case TMP411C_DEVICE_ID:
676 if (client->addr != 0x4e)
677 return -ENODEV;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100678 kind = tmp411;
679 break;
Guenter Roecka1fac922013-03-15 12:55:08 -0700680 case TMP431_DEVICE_ID:
681 if (client->addr == 0x4e)
682 return -ENODEV;
683 kind = tmp431;
684 break;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700685 case TMP432_DEVICE_ID:
686 if (client->addr == 0x4e)
687 return -ENODEV;
688 kind = tmp432;
689 break;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100690 default:
691 return -ENODEV;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200692 }
Jean Delvaredbe73c82009-12-09 20:35:54 +0100693
694 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
695 if (reg & 0x1b)
696 return -ENODEV;
697
698 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
699 /* Datasheet says: 0x1-0x6 */
700 if (reg > 15)
701 return -ENODEV;
702
Jean Delvaredc71afe2010-03-05 22:17:26 +0100703 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200704
705 return 0;
706}
707
Andre Prendelea63c2b2010-05-27 19:58:49 +0200708static int tmp401_remove(struct i2c_client *client)
709{
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700710 struct device *dev = &client->dev;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200711 struct tmp401_data *data = i2c_get_clientdata(client);
Andre Prendelea63c2b2010-05-27 19:58:49 +0200712
713 if (data->hwmon_dev)
714 hwmon_device_unregister(data->hwmon_dev);
715
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700716 sysfs_remove_group(&dev->kobj, &tmp401_group);
Andre Prendelea63c2b2010-05-27 19:58:49 +0200717
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700718 if (data->kind == tmp411)
719 sysfs_remove_group(&dev->kobj, &tmp411_group);
Andre Prendelea63c2b2010-05-27 19:58:49 +0200720
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700721 if (data->kind == tmp432)
722 sysfs_remove_group(&dev->kobj, &tmp432_group);
723
Andre Prendelea63c2b2010-05-27 19:58:49 +0200724 return 0;
725}
726
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200727static int tmp401_probe(struct i2c_client *client,
728 const struct i2c_device_id *id)
729{
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700730 struct device *dev = &client->dev;
731 int err;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200732 struct tmp401_data *data;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700733 const char *names[] = { "TMP401", "TMP411", "TMP431", "TMP432" };
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200734
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700735 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200736 if (!data)
737 return -ENOMEM;
738
739 i2c_set_clientdata(client, data);
740 mutex_init(&data->update_lock);
Andre Prendelfce07582009-06-15 18:39:47 +0200741 data->kind = id->driver_data;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200742
743 /* Initialize the TMP401 chip */
744 tmp401_init_client(client);
745
746 /* Register sysfs hooks */
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700747 err = sysfs_create_group(&dev->kobj, &tmp401_group);
748 if (err)
749 return err;
750
751 /* Register additional tmp411 sysfs hooks */
752 if (data->kind == tmp411) {
753 err = sysfs_create_group(&dev->kobj, &tmp411_group);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200754 if (err)
755 goto exit_remove;
756 }
757
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700758 /* Register additional tmp432 sysfs hooks */
759 if (data->kind == tmp432) {
760 err = sysfs_create_group(&dev->kobj, &tmp432_group);
761 if (err)
762 goto exit_remove;
763 }
764
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700765 data->hwmon_dev = hwmon_device_register(dev);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200766 if (IS_ERR(data->hwmon_dev)) {
767 err = PTR_ERR(data->hwmon_dev);
768 data->hwmon_dev = NULL;
769 goto exit_remove;
770 }
771
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700772 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200773
774 return 0;
775
776exit_remove:
Guenter Roeck0df9fc72012-06-02 11:35:53 -0700777 tmp401_remove(client);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200778 return err;
779}
780
Andre Prendelea63c2b2010-05-27 19:58:49 +0200781static struct i2c_driver tmp401_driver = {
782 .class = I2C_CLASS_HWMON,
783 .driver = {
784 .name = "tmp401",
785 },
786 .probe = tmp401_probe,
787 .remove = tmp401_remove,
788 .id_table = tmp401_id,
789 .detect = tmp401_detect,
790 .address_list = normal_i2c,
791};
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200792
Axel Linf0967ee2012-01-20 15:38:18 +0800793module_i2c_driver(tmp401_driver);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200794
795MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
796MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
797MODULE_LICENSE("GPL");