blob: 99664ebc738d8003139135a89f07f97e3c6305e2 [file] [log] [blame]
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 Roeck907a6d52014-12-05 10:15:03 -080047static const unsigned short normal_i2c[] = { 0x37, 0x48, 0x49, 0x4a, 0x4c, 0x4d,
48 0x4e, 0x4f, I2C_CLIENT_END };
Hans de Goedeab2b79d2009-06-15 18:39:46 +020049
Patrick Titiano06adbae2014-12-04 17:45:51 +010050enum chips { tmp401, tmp411, tmp431, tmp432, tmp435 };
Hans de Goedeab2b79d2009-06-15 18:39:46 +020051
52/*
53 * The TMP401 registers, note some registers have different addresses for
54 * reading and writing
55 */
56#define TMP401_STATUS 0x02
57#define TMP401_CONFIG_READ 0x03
58#define TMP401_CONFIG_WRITE 0x09
59#define TMP401_CONVERSION_RATE_READ 0x04
60#define TMP401_CONVERSION_RATE_WRITE 0x0A
61#define TMP401_TEMP_CRIT_HYST 0x21
Hans de Goedeab2b79d2009-06-15 18:39:46 +020062#define TMP401_MANUFACTURER_ID_REG 0xFE
63#define TMP401_DEVICE_ID_REG 0xFF
64
Guenter Roeck14f2a662013-03-27 21:23:10 -070065static const u8 TMP401_TEMP_MSB_READ[6][2] = {
66 { 0x00, 0x01 }, /* temp */
67 { 0x06, 0x08 }, /* low limit */
68 { 0x05, 0x07 }, /* high limit */
69 { 0x20, 0x19 }, /* therm (crit) limit */
70 { 0x30, 0x34 }, /* lowest */
71 { 0x32, 0x36 }, /* highest */
72};
Hans de Goedeab2b79d2009-06-15 18:39:46 +020073
Guenter Roeck14f2a662013-03-27 21:23:10 -070074static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
75 { 0, 0 }, /* temp (unused) */
76 { 0x0C, 0x0E }, /* low limit */
77 { 0x0B, 0x0D }, /* high limit */
78 { 0x20, 0x19 }, /* therm (crit) limit */
79 { 0x30, 0x34 }, /* lowest */
80 { 0x32, 0x36 }, /* highest */
81};
82
83static const u8 TMP401_TEMP_LSB[6][2] = {
84 { 0x15, 0x10 }, /* temp */
85 { 0x17, 0x14 }, /* low limit */
86 { 0x16, 0x13 }, /* high limit */
87 { 0, 0 }, /* therm (crit) limit (unused) */
88 { 0x31, 0x35 }, /* lowest */
89 { 0x33, 0x37 }, /* highest */
90};
Andre Prendelfce07582009-06-15 18:39:47 +020091
Guenter Roeck29dd3b62013-03-28 01:36:44 -070092static const u8 TMP432_TEMP_MSB_READ[4][3] = {
93 { 0x00, 0x01, 0x23 }, /* temp */
94 { 0x06, 0x08, 0x16 }, /* low limit */
95 { 0x05, 0x07, 0x15 }, /* high limit */
96 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
97};
98
99static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
100 { 0, 0, 0 }, /* temp - unused */
101 { 0x0C, 0x0E, 0x16 }, /* low limit */
102 { 0x0B, 0x0D, 0x15 }, /* high limit */
103 { 0x20, 0x19, 0x1A }, /* therm (crit) limit */
104};
105
106static const u8 TMP432_TEMP_LSB[3][3] = {
107 { 0x29, 0x10, 0x24 }, /* temp */
108 { 0x3E, 0x14, 0x18 }, /* low limit */
109 { 0x3D, 0x13, 0x17 }, /* high limit */
110};
111
112/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
113static const u8 TMP432_STATUS_REG[] = {
114 0x1b, 0x36, 0x35, 0x37 };
115
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200116/* Flags */
Guenter Roeck947e9272013-03-27 08:48:03 -0700117#define TMP401_CONFIG_RANGE BIT(2)
118#define TMP401_CONFIG_SHUTDOWN BIT(6)
119#define TMP401_STATUS_LOCAL_CRIT BIT(0)
120#define TMP401_STATUS_REMOTE_CRIT BIT(1)
121#define TMP401_STATUS_REMOTE_OPEN BIT(2)
122#define TMP401_STATUS_REMOTE_LOW BIT(3)
123#define TMP401_STATUS_REMOTE_HIGH BIT(4)
124#define TMP401_STATUS_LOCAL_LOW BIT(5)
125#define TMP401_STATUS_LOCAL_HIGH BIT(6)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200126
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700127/* On TMP432, each status has its own register */
128#define TMP432_STATUS_LOCAL BIT(0)
129#define TMP432_STATUS_REMOTE1 BIT(1)
130#define TMP432_STATUS_REMOTE2 BIT(2)
131
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200132/* Manufacturer / Device ID's */
133#define TMP401_MANUFACTURER_ID 0x55
134#define TMP401_DEVICE_ID 0x11
Guenter Roeck4ce5b1f2013-03-29 17:56:07 -0700135#define TMP411A_DEVICE_ID 0x12
136#define TMP411B_DEVICE_ID 0x13
137#define TMP411C_DEVICE_ID 0x10
Guenter Roecka1fac922013-03-15 12:55:08 -0700138#define TMP431_DEVICE_ID 0x31
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700139#define TMP432_DEVICE_ID 0x32
Patrick Titiano06adbae2014-12-04 17:45:51 +0100140#define TMP435_DEVICE_ID 0x35
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200141
142/*
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200143 * Driver data (common to all clients)
144 */
145
146static const struct i2c_device_id tmp401_id[] = {
147 { "tmp401", tmp401 },
Andre Prendelfce07582009-06-15 18:39:47 +0200148 { "tmp411", tmp411 },
Guenter Roecka1fac922013-03-15 12:55:08 -0700149 { "tmp431", tmp431 },
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700150 { "tmp432", tmp432 },
Patrick Titiano06adbae2014-12-04 17:45:51 +0100151 { "tmp435", tmp435 },
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200152 { }
153};
154MODULE_DEVICE_TABLE(i2c, tmp401_id);
155
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200156/*
157 * Client data (each client gets its own)
158 */
159
160struct tmp401_data {
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700161 struct i2c_client *client;
162 const struct attribute_group *groups[3];
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200163 struct mutex update_lock;
164 char valid; /* zero until following fields are valid */
165 unsigned long last_updated; /* in jiffies */
Jean Delvaredc71afe2010-03-05 22:17:26 +0100166 enum chips kind;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200167
Guenter Roeck0846e302013-03-28 02:03:10 -0700168 unsigned int update_interval; /* in milliseconds */
169
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200170 /* register values */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700171 u8 status[4];
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200172 u8 config;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700173 u16 temp[6][3];
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200174 u8 temp_crit_hyst;
175};
176
177/*
178 * Sysfs attr show / store functions
179 */
180
181static int tmp401_register_to_temp(u16 reg, u8 config)
182{
183 int temp = reg;
184
185 if (config & TMP401_CONFIG_RANGE)
186 temp -= 64 * 256;
187
Guenter Roeck14f2a662013-03-27 21:23:10 -0700188 return DIV_ROUND_CLOSEST(temp * 125, 32);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200189}
190
Guenter Roeck14f2a662013-03-27 21:23:10 -0700191static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200192{
193 if (config & TMP401_CONFIG_RANGE) {
Guenter Roeck2a844c12013-01-09 08:09:34 -0800194 temp = clamp_val(temp, -64000, 191000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200195 temp += 64000;
196 } else
Guenter Roeck2a844c12013-01-09 08:09:34 -0800197 temp = clamp_val(temp, 0, 127000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200198
Guenter Roeck14f2a662013-03-27 21:23:10 -0700199 return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200200}
201
Guenter Roeck14f2a662013-03-27 21:23:10 -0700202static int tmp401_update_device_reg16(struct i2c_client *client,
203 struct tmp401_data *data)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200204{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700205 int i, j, val;
206 int num_regs = data->kind == tmp411 ? 6 : 4;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700207 int num_sensors = data->kind == tmp432 ? 3 : 2;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200208
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700209 for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
Guenter Roeck14f2a662013-03-27 21:23:10 -0700210 for (j = 0; j < num_regs; j++) { /* temp / low / ... */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700211 u8 regaddr;
Guenter Roeck14f2a662013-03-27 21:23:10 -0700212 /*
213 * High byte must be read first immediately followed
214 * by the low byte
215 */
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700216 regaddr = data->kind == tmp432 ?
217 TMP432_TEMP_MSB_READ[j][i] :
218 TMP401_TEMP_MSB_READ[j][i];
219 val = i2c_smbus_read_byte_data(client, regaddr);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700220 if (val < 0)
221 return val;
222 data->temp[j][i] = val << 8;
223 if (j == 3) /* crit is msb only */
224 continue;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700225 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
226 : TMP401_TEMP_LSB[j][i];
227 val = i2c_smbus_read_byte_data(client, regaddr);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700228 if (val < 0)
229 return val;
230 data->temp[j][i] |= val;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200231 }
232 }
Guenter Roeck14f2a662013-03-27 21:23:10 -0700233 return 0;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200234}
235
236static struct tmp401_data *tmp401_update_device(struct device *dev)
237{
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700238 struct tmp401_data *data = dev_get_drvdata(dev);
239 struct i2c_client *client = data->client;
Guenter Roeck14f2a662013-03-27 21:23:10 -0700240 struct tmp401_data *ret = data;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700241 int i, val;
Guenter Roeck0846e302013-03-28 02:03:10 -0700242 unsigned long next_update;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200243
244 mutex_lock(&data->update_lock);
245
Guenter Roeck0846e302013-03-28 02:03:10 -0700246 next_update = data->last_updated +
Jean Delvare4e2284d2013-05-19 16:57:30 +0200247 msecs_to_jiffies(data->update_interval);
Guenter Roeck0846e302013-03-28 02:03:10 -0700248 if (time_after(jiffies, next_update) || !data->valid) {
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700249 if (data->kind != tmp432) {
250 /*
251 * The driver uses the TMP432 status format internally.
252 * Convert status to TMP432 format for other chips.
253 */
254 val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
255 if (val < 0) {
256 ret = ERR_PTR(val);
257 goto abort;
258 }
259 data->status[0] =
260 (val & TMP401_STATUS_REMOTE_OPEN) >> 1;
261 data->status[1] =
262 ((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
263 ((val & TMP401_STATUS_LOCAL_LOW) >> 5);
264 data->status[2] =
265 ((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
266 ((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
267 data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
268 | TMP401_STATUS_REMOTE_CRIT);
269 } else {
270 for (i = 0; i < ARRAY_SIZE(data->status); i++) {
271 val = i2c_smbus_read_byte_data(client,
272 TMP432_STATUS_REG[i]);
273 if (val < 0) {
274 ret = ERR_PTR(val);
275 goto abort;
276 }
277 data->status[i] = val;
278 }
Guenter Roeck14f2a662013-03-27 21:23:10 -0700279 }
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700280
Guenter Roeck14f2a662013-03-27 21:23:10 -0700281 val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
282 if (val < 0) {
283 ret = ERR_PTR(val);
284 goto abort;
285 }
286 data->config = val;
287 val = tmp401_update_device_reg16(client, data);
288 if (val < 0) {
289 ret = ERR_PTR(val);
290 goto abort;
291 }
292 val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
293 if (val < 0) {
294 ret = ERR_PTR(val);
295 goto abort;
296 }
297 data->temp_crit_hyst = val;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200298
299 data->last_updated = jiffies;
300 data->valid = 1;
301 }
302
Guenter Roeck14f2a662013-03-27 21:23:10 -0700303abort:
Andre Prendelea63c2b2010-05-27 19:58:49 +0200304 mutex_unlock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700305 return ret;
Andre Prendelea63c2b2010-05-27 19:58:49 +0200306}
307
Guenter Roeck14f2a662013-03-27 21:23:10 -0700308static ssize_t show_temp(struct device *dev,
309 struct device_attribute *devattr, char *buf)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200310{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700311 int nr = to_sensor_dev_attr_2(devattr)->nr;
312 int index = to_sensor_dev_attr_2(devattr)->index;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200313 struct tmp401_data *data = tmp401_update_device(dev);
314
Guenter Roeck14f2a662013-03-27 21:23:10 -0700315 if (IS_ERR(data))
316 return PTR_ERR(data);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200317
318 return sprintf(buf, "%d\n",
Guenter Roeck14f2a662013-03-27 21:23:10 -0700319 tmp401_register_to_temp(data->temp[nr][index], data->config));
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200320}
321
322static ssize_t show_temp_crit_hyst(struct device *dev,
323 struct device_attribute *devattr, char *buf)
324{
325 int temp, index = to_sensor_dev_attr(devattr)->index;
326 struct tmp401_data *data = tmp401_update_device(dev);
327
Guenter Roeck14f2a662013-03-27 21:23:10 -0700328 if (IS_ERR(data))
329 return PTR_ERR(data);
330
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200331 mutex_lock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700332 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200333 temp -= data->temp_crit_hyst * 1000;
334 mutex_unlock(&data->update_lock);
335
336 return sprintf(buf, "%d\n", temp);
337}
338
339static ssize_t show_status(struct device *dev,
340 struct device_attribute *devattr, char *buf)
341{
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700342 int nr = to_sensor_dev_attr_2(devattr)->nr;
343 int mask = to_sensor_dev_attr_2(devattr)->index;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200344 struct tmp401_data *data = tmp401_update_device(dev);
345
Guenter Roeck14f2a662013-03-27 21:23:10 -0700346 if (IS_ERR(data))
347 return PTR_ERR(data);
348
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700349 return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200350}
351
Guenter Roeck14f2a662013-03-27 21:23:10 -0700352static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
353 const char *buf, size_t count)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200354{
Guenter Roeck14f2a662013-03-27 21:23:10 -0700355 int nr = to_sensor_dev_attr_2(devattr)->nr;
356 int index = to_sensor_dev_attr_2(devattr)->index;
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700357 struct tmp401_data *data = dev_get_drvdata(dev);
358 struct i2c_client *client = data->client;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200359 long val;
360 u16 reg;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700361 u8 regaddr;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200362
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100363 if (kstrtol(buf, 10, &val))
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200364 return -EINVAL;
365
Guenter Roeck14f2a662013-03-27 21:23:10 -0700366 reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200367
368 mutex_lock(&data->update_lock);
369
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700370 regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
371 : TMP401_TEMP_MSB_WRITE[nr][index];
372 i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700373 if (nr != 3) {
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700374 regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
375 : TMP401_TEMP_LSB[nr][index];
376 i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700377 }
378 data->temp[nr][index] = reg;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200379
380 mutex_unlock(&data->update_lock);
381
382 return count;
383}
384
385static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
386 *devattr, const char *buf, size_t count)
387{
388 int temp, index = to_sensor_dev_attr(devattr)->index;
389 struct tmp401_data *data = tmp401_update_device(dev);
390 long val;
391 u8 reg;
392
Guenter Roeck14f2a662013-03-27 21:23:10 -0700393 if (IS_ERR(data))
394 return PTR_ERR(data);
395
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100396 if (kstrtol(buf, 10, &val))
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200397 return -EINVAL;
398
399 if (data->config & TMP401_CONFIG_RANGE)
Guenter Roeck2a844c12013-01-09 08:09:34 -0800400 val = clamp_val(val, -64000, 191000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200401 else
Guenter Roeck2a844c12013-01-09 08:09:34 -0800402 val = clamp_val(val, 0, 127000);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200403
404 mutex_lock(&data->update_lock);
Guenter Roeck14f2a662013-03-27 21:23:10 -0700405 temp = tmp401_register_to_temp(data->temp[3][index], data->config);
Guenter Roeck2a844c12013-01-09 08:09:34 -0800406 val = clamp_val(val, temp - 255000, temp);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200407 reg = ((temp - val) + 500) / 1000;
408
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700409 i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
Guenter Roeck14f2a662013-03-27 21:23:10 -0700410 reg);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200411
412 data->temp_crit_hyst = reg;
413
414 mutex_unlock(&data->update_lock);
415
416 return count;
417}
418
Andre Prendelfce07582009-06-15 18:39:47 +0200419/*
420 * Resets the historical measurements of minimum and maximum temperatures.
421 * This is done by writing any value to any of the minimum/maximum registers
422 * (0x30-0x37).
423 */
424static ssize_t reset_temp_history(struct device *dev,
425 struct device_attribute *devattr, const char *buf, size_t count)
426{
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700427 struct tmp401_data *data = dev_get_drvdata(dev);
428 struct i2c_client *client = data->client;
Andre Prendelfce07582009-06-15 18:39:47 +0200429 long val;
430
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100431 if (kstrtol(buf, 10, &val))
Andre Prendelfce07582009-06-15 18:39:47 +0200432 return -EINVAL;
433
434 if (val != 1) {
Guenter Roeckb55f3752013-01-10 10:01:24 -0800435 dev_err(dev,
436 "temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
437 val);
Andre Prendelfce07582009-06-15 18:39:47 +0200438 return -EINVAL;
439 }
Guenter Roeck8eb6d902013-04-14 04:39:46 -0700440 mutex_lock(&data->update_lock);
441 i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
442 data->valid = 0;
443 mutex_unlock(&data->update_lock);
Andre Prendelfce07582009-06-15 18:39:47 +0200444
445 return count;
446}
447
Guenter Roeck0846e302013-03-28 02:03:10 -0700448static ssize_t show_update_interval(struct device *dev,
449 struct device_attribute *attr, char *buf)
450{
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700451 struct tmp401_data *data = dev_get_drvdata(dev);
Guenter Roeck0846e302013-03-28 02:03:10 -0700452
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{
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700460 struct tmp401_data *data = dev_get_drvdata(dev);
461 struct i2c_client *client = data->client;
Guenter Roeck0846e302013-03-28 02:03:10 -0700462 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
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100619static int tmp401_init_client(struct tmp401_data *data,
620 struct i2c_client *client)
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200621{
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100622 int config, config_orig, status = 0;
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);
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100630 if (config < 0)
631 return config;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200632
633 config_orig = config;
634 config &= ~TMP401_CONFIG_SHUTDOWN;
635
636 if (config != config_orig)
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100637 status = i2c_smbus_write_byte_data(client,
638 TMP401_CONFIG_WRITE,
639 config);
640
641 return status;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200642}
643
Jean Delvare310ec792009-12-14 21:17:23 +0100644static int tmp401_detect(struct i2c_client *client,
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200645 struct i2c_board_info *info)
646{
Jean Delvaredbe73c82009-12-09 20:35:54 +0100647 enum chips kind;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200648 struct i2c_adapter *adapter = client->adapter;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100649 u8 reg;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200650
651 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
652 return -ENODEV;
653
654 /* Detect and identify the chip */
Jean Delvaredbe73c82009-12-09 20:35:54 +0100655 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
656 if (reg != TMP401_MANUFACTURER_ID)
657 return -ENODEV;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200658
Jean Delvaredbe73c82009-12-09 20:35:54 +0100659 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200660
Jean Delvaredbe73c82009-12-09 20:35:54 +0100661 switch (reg) {
662 case TMP401_DEVICE_ID:
Guenter Roecka1fac922013-03-15 12:55:08 -0700663 if (client->addr != 0x4c)
664 return -ENODEV;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100665 kind = tmp401;
666 break;
Guenter Roeck4ce5b1f2013-03-29 17:56:07 -0700667 case TMP411A_DEVICE_ID:
668 if (client->addr != 0x4c)
669 return -ENODEV;
670 kind = tmp411;
671 break;
672 case TMP411B_DEVICE_ID:
673 if (client->addr != 0x4d)
674 return -ENODEV;
675 kind = tmp411;
676 break;
677 case TMP411C_DEVICE_ID:
678 if (client->addr != 0x4e)
679 return -ENODEV;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100680 kind = tmp411;
681 break;
Guenter Roecka1fac922013-03-15 12:55:08 -0700682 case TMP431_DEVICE_ID:
Guenter Roeck907a6d52014-12-05 10:15:03 -0800683 if (client->addr != 0x4c && client->addr != 0x4d)
Guenter Roecka1fac922013-03-15 12:55:08 -0700684 return -ENODEV;
685 kind = tmp431;
686 break;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700687 case TMP432_DEVICE_ID:
Guenter Roeck907a6d52014-12-05 10:15:03 -0800688 if (client->addr != 0x4c && client->addr != 0x4d)
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700689 return -ENODEV;
690 kind = tmp432;
691 break;
Patrick Titiano06adbae2014-12-04 17:45:51 +0100692 case TMP435_DEVICE_ID:
Patrick Titiano06adbae2014-12-04 17:45:51 +0100693 kind = tmp435;
694 break;
Jean Delvaredbe73c82009-12-09 20:35:54 +0100695 default:
696 return -ENODEV;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200697 }
Jean Delvaredbe73c82009-12-09 20:35:54 +0100698
699 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
700 if (reg & 0x1b)
701 return -ENODEV;
702
703 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
704 /* Datasheet says: 0x1-0x6 */
705 if (reg > 15)
706 return -ENODEV;
707
Jean Delvaredc71afe2010-03-05 22:17:26 +0100708 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200709
710 return 0;
711}
712
713static int tmp401_probe(struct i2c_client *client,
714 const struct i2c_device_id *id)
715{
Patrick Titiano06adbae2014-12-04 17:45:51 +0100716 static const char * const names[] = {
717 "TMP401", "TMP411", "TMP431", "TMP432", "TMP435"
718 };
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700719 struct device *dev = &client->dev;
720 struct device *hwmon_dev;
721 struct tmp401_data *data;
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100722 int groups = 0, status;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200723
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700724 data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200725 if (!data)
726 return -ENOMEM;
727
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700728 data->client = client;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200729 mutex_init(&data->update_lock);
Andre Prendelfce07582009-06-15 18:39:47 +0200730 data->kind = id->driver_data;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200731
732 /* Initialize the TMP401 chip */
Bartosz Golaszewski90652ef2014-12-04 17:45:53 +0100733 status = tmp401_init_client(data, client);
734 if (status < 0)
735 return status;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200736
737 /* Register sysfs hooks */
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700738 data->groups[groups++] = &tmp401_group;
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700739
740 /* Register additional tmp411 sysfs hooks */
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700741 if (data->kind == tmp411)
742 data->groups[groups++] = &tmp411_group;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200743
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700744 /* Register additional tmp432 sysfs hooks */
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700745 if (data->kind == tmp432)
746 data->groups[groups++] = &tmp432_group;
Guenter Roeck29dd3b62013-03-28 01:36:44 -0700747
Guenter Roeckf3643ac2013-09-04 16:24:09 -0700748 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
749 data, data->groups);
750 if (IS_ERR(hwmon_dev))
751 return PTR_ERR(hwmon_dev);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200752
Guenter Roeckb4e665c2013-03-27 08:58:46 -0700753 dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200754
755 return 0;
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200756}
757
Andre Prendelea63c2b2010-05-27 19:58:49 +0200758static struct i2c_driver tmp401_driver = {
759 .class = I2C_CLASS_HWMON,
760 .driver = {
761 .name = "tmp401",
762 },
763 .probe = tmp401_probe,
Andre Prendelea63c2b2010-05-27 19:58:49 +0200764 .id_table = tmp401_id,
765 .detect = tmp401_detect,
766 .address_list = normal_i2c,
767};
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200768
Axel Linf0967ee2012-01-20 15:38:18 +0800769module_i2c_driver(tmp401_driver);
Hans de Goedeab2b79d2009-06-15 18:39:46 +0200770
771MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
772MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
773MODULE_LICENSE("GPL");