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1/*
2 * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
3 *
4 * Copyright (C) 2008, 2010 Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * TODO: SPI, use power-down mode for suspend?, interrupt handling?
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/err.h>
17#include <linux/mutex.h>
18#include <linux/jiffies.h>
19#include <linux/i2c.h>
20#include <linux/hwmon.h>
21#include <linux/hwmon-sysfs.h>
22#include <linux/slab.h>
23
24#define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
25#define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
26#define ADT7411_REG_VDD_MSB 0x06
27#define ADT7411_REG_INT_TEMP_MSB 0x07
28#define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
29
30#define ADT7411_REG_CFG1 0x18
31#define ADT7411_CFG1_START_MONITOR (1 << 0)
32#define ADT7411_CFG1_RESERVED_BIT1 (1 << 1)
33#define ADT7411_CFG1_EXT_TDM (1 << 2)
34#define ADT7411_CFG1_RESERVED_BIT3 (1 << 3)
35
36#define ADT7411_REG_CFG2 0x19
37#define ADT7411_CFG2_DISABLE_AVG (1 << 5)
38
39#define ADT7411_REG_CFG3 0x1a
40#define ADT7411_CFG3_ADC_CLK_225 (1 << 0)
41#define ADT7411_CFG3_RESERVED_BIT1 (1 << 1)
42#define ADT7411_CFG3_RESERVED_BIT2 (1 << 2)
43#define ADT7411_CFG3_RESERVED_BIT3 (1 << 3)
44#define ADT7411_CFG3_REF_VDD (1 << 4)
45
46#define ADT7411_REG_DEVICE_ID 0x4d
47#define ADT7411_REG_MANUFACTURER_ID 0x4e
48
49#define ADT7411_DEVICE_ID 0x2
50#define ADT7411_MANUFACTURER_ID 0x41
51
52static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
53
54struct adt7411_data {
55 struct mutex device_lock; /* for "atomic" device accesses */
56 struct mutex update_lock;
57 unsigned long next_update;
58 long vref_cached;
59 struct i2c_client *client;
60 bool use_ext_temp;
61};
62
63/*
64 * When reading a register containing (up to 4) lsb, all associated
65 * msb-registers get locked by the hardware. After _one_ of those msb is read,
66 * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
67 * is protected here with a mutex, too.
68 */
69static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
70 u8 msb_reg, u8 lsb_shift)
71{
72 struct adt7411_data *data = i2c_get_clientdata(client);
73 int val, tmp;
74
75 mutex_lock(&data->device_lock);
76
77 val = i2c_smbus_read_byte_data(client, lsb_reg);
78 if (val < 0)
79 goto exit_unlock;
80
81 tmp = (val >> lsb_shift) & 3;
82 val = i2c_smbus_read_byte_data(client, msb_reg);
83
84 if (val >= 0)
85 val = (val << 2) | tmp;
86
87 exit_unlock:
88 mutex_unlock(&data->device_lock);
89
90 return val;
91}
92
93static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
94 bool flag)
95{
96 struct adt7411_data *data = i2c_get_clientdata(client);
97 int ret, val;
98
99 mutex_lock(&data->device_lock);
100
101 ret = i2c_smbus_read_byte_data(client, reg);
102 if (ret < 0)
103 goto exit_unlock;
104
105 if (flag)
106 val = ret | bit;
107 else
108 val = ret & ~bit;
109
110 ret = i2c_smbus_write_byte_data(client, reg, val);
111
112 exit_unlock:
113 mutex_unlock(&data->device_lock);
114 return ret;
115}
116
117static ssize_t adt7411_show_bit(struct device *dev,
118 struct device_attribute *attr, char *buf)
119{
120 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
121 struct adt7411_data *data = dev_get_drvdata(dev);
122 struct i2c_client *client = data->client;
123 int ret = i2c_smbus_read_byte_data(client, attr2->index);
124
125 return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
126}
127
128static ssize_t adt7411_set_bit(struct device *dev,
129 struct device_attribute *attr, const char *buf,
130 size_t count)
131{
132 struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
133 struct adt7411_data *data = dev_get_drvdata(dev);
134 struct i2c_client *client = data->client;
135 int ret;
136 unsigned long flag;
137
138 ret = kstrtoul(buf, 0, &flag);
139 if (ret || flag > 1)
140 return -EINVAL;
141
142 ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
143
144 /* force update */
145 mutex_lock(&data->update_lock);
146 data->next_update = jiffies;
147 mutex_unlock(&data->update_lock);
148
149 return ret < 0 ? ret : count;
150}
151
152#define ADT7411_BIT_ATTR(__name, __reg, __bit) \
153 SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
154 adt7411_set_bit, __bit, __reg)
155
156static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
157static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
158static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
159
160static struct attribute *adt7411_attrs[] = {
161 &sensor_dev_attr_no_average.dev_attr.attr,
162 &sensor_dev_attr_fast_sampling.dev_attr.attr,
163 &sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
164 NULL
165};
166ATTRIBUTE_GROUPS(adt7411);
167
168static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
169{
170 struct adt7411_data *data = dev_get_drvdata(dev);
171 struct i2c_client *client = data->client;
172 int ret;
173
174 switch (attr) {
175 case hwmon_in_input:
176 ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
177 ADT7411_REG_VDD_MSB, 2);
178 if (ret < 0)
179 return ret;
180 *val = ret * 7000 / 1024;
181 return 0;
182 default:
183 return -EOPNOTSUPP;
184 }
185}
186
187static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
188 long *val)
189{
190 struct adt7411_data *data = dev_get_drvdata(dev);
191 struct i2c_client *client = data->client;
192
193 int ret;
194 int lsb_reg, lsb_shift;
195 int nr = channel - 1;
196
197 mutex_lock(&data->update_lock);
198 if (time_after_eq(jiffies, data->next_update)) {
199 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
200 if (ret < 0)
201 goto exit_unlock;
202
203 if (ret & ADT7411_CFG3_REF_VDD) {
204 ret = adt7411_read_in_vdd(dev, hwmon_in_input,
205 &data->vref_cached);
206 if (ret < 0)
207 goto exit_unlock;
208 } else {
209 data->vref_cached = 2250;
210 }
211
212 data->next_update = jiffies + HZ;
213 }
214
215 switch (attr) {
216 case hwmon_in_input:
217 lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
218 lsb_shift = 2 * (nr & 0x03);
219 ret = adt7411_read_10_bit(client, lsb_reg,
220 ADT7411_REG_EXT_TEMP_AIN1_MSB + nr,
221 lsb_shift);
222 if (ret < 0)
223 goto exit_unlock;
224 *val = ret * data->vref_cached / 1024;
225 ret = 0;
226 break;
227 default:
228 ret = -EOPNOTSUPP;
229 break;
230 }
231 exit_unlock:
232 mutex_unlock(&data->update_lock);
233 return ret;
234}
235
236static int adt7411_read_in(struct device *dev, u32 attr, int channel,
237 long *val)
238{
239 if (channel == 0)
240 return adt7411_read_in_vdd(dev, attr, val);
241 else
242 return adt7411_read_in_chan(dev, attr, channel, val);
243}
244
245static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
246 long *val)
247{
248 struct adt7411_data *data = dev_get_drvdata(dev);
249 struct i2c_client *client = data->client;
250 int ret, regl, regh;
251
252 switch (attr) {
253 case hwmon_temp_input:
254 regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB :
255 ADT7411_REG_INT_TEMP_VDD_LSB;
256 regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB :
257 ADT7411_REG_INT_TEMP_MSB;
258 ret = adt7411_read_10_bit(client, regl, regh, 0);
259 if (ret < 0)
260 return ret;
261 ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
262 *val = ret * 250;
263 return 0;
264 default:
265 return -EOPNOTSUPP;
266 }
267}
268
269static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
270 u32 attr, int channel, long *val)
271{
272 switch (type) {
273 case hwmon_in:
274 return adt7411_read_in(dev, attr, channel, val);
275 case hwmon_temp:
276 return adt7411_read_temp(dev, attr, channel, val);
277 default:
278 return -EOPNOTSUPP;
279 }
280}
281
282static umode_t adt7411_is_visible(const void *_data,
283 enum hwmon_sensor_types type,
284 u32 attr, int channel)
285{
286 const struct adt7411_data *data = _data;
287
288 switch (type) {
289 case hwmon_in:
290 if (channel > 0 && channel < 3)
291 return data->use_ext_temp ? 0 : S_IRUGO;
292 else
293 return S_IRUGO;
294 case hwmon_temp:
295 if (channel == 1)
296 return data->use_ext_temp ? S_IRUGO : 0;
297 else
298 return S_IRUGO;
299 default:
300 return 0;
301 }
302}
303
304static int adt7411_detect(struct i2c_client *client,
305 struct i2c_board_info *info)
306{
307 int val;
308
309 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
310 return -ENODEV;
311
312 val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
313 if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
314 dev_dbg(&client->dev,
315 "Wrong manufacturer ID. Got %d, expected %d\n",
316 val, ADT7411_MANUFACTURER_ID);
317 return -ENODEV;
318 }
319
320 val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
321 if (val < 0 || val != ADT7411_DEVICE_ID) {
322 dev_dbg(&client->dev,
323 "Wrong device ID. Got %d, expected %d\n",
324 val, ADT7411_DEVICE_ID);
325 return -ENODEV;
326 }
327
328 strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
329
330 return 0;
331}
332
333static int adt7411_init_device(struct adt7411_data *data)
334{
335 int ret;
336 u8 val;
337
338 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3);
339 if (ret < 0)
340 return ret;
341
342 /*
343 * We must only write zero to bit 1 and bit 2 and only one to bit 3
344 * according to the datasheet.
345 */
346 val = ret;
347 val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2);
348 val |= ADT7411_CFG3_RESERVED_BIT3;
349
350 ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val);
351 if (ret < 0)
352 return ret;
353
354 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1);
355 if (ret < 0)
356 return ret;
357
358 data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM;
359
360 /*
361 * We must only write zero to bit 1 and only one to bit 3 according to
362 * the datasheet.
363 */
364 val = ret;
365 val &= ~ADT7411_CFG1_RESERVED_BIT1;
366 val |= ADT7411_CFG1_RESERVED_BIT3;
367
368 /* enable monitoring */
369 val |= ADT7411_CFG1_START_MONITOR;
370
371 return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val);
372}
373
374static const u32 adt7411_in_config[] = {
375 HWMON_I_INPUT,
376 HWMON_I_INPUT,
377 HWMON_I_INPUT,
378 HWMON_I_INPUT,
379 HWMON_I_INPUT,
380 HWMON_I_INPUT,
381 HWMON_I_INPUT,
382 HWMON_I_INPUT,
383 HWMON_I_INPUT,
384 0
385};
386
387static const struct hwmon_channel_info adt7411_in = {
388 .type = hwmon_in,
389 .config = adt7411_in_config,
390};
391
392static const u32 adt7411_temp_config[] = {
393 HWMON_T_INPUT,
394 HWMON_T_INPUT,
395 0
396};
397
398static const struct hwmon_channel_info adt7411_temp = {
399 .type = hwmon_temp,
400 .config = adt7411_temp_config,
401};
402
403static const struct hwmon_channel_info *adt7411_info[] = {
404 &adt7411_in,
405 &adt7411_temp,
406 NULL
407};
408
409static const struct hwmon_ops adt7411_hwmon_ops = {
410 .is_visible = adt7411_is_visible,
411 .read = adt7411_read,
412};
413
414static const struct hwmon_chip_info adt7411_chip_info = {
415 .ops = &adt7411_hwmon_ops,
416 .info = adt7411_info,
417};
418
419static int adt7411_probe(struct i2c_client *client,
420 const struct i2c_device_id *id)
421{
422 struct device *dev = &client->dev;
423 struct adt7411_data *data;
424 struct device *hwmon_dev;
425 int ret;
426
427 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
428 if (!data)
429 return -ENOMEM;
430
431 i2c_set_clientdata(client, data);
432 data->client = client;
433 mutex_init(&data->device_lock);
434 mutex_init(&data->update_lock);
435
436 ret = adt7411_init_device(data);
437 if (ret < 0)
438 return ret;
439
440 /* force update on first occasion */
441 data->next_update = jiffies;
442
443 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
444 data,
445 &adt7411_chip_info,
446 adt7411_groups);
447 return PTR_ERR_OR_ZERO(hwmon_dev);
448}
449
450static const struct i2c_device_id adt7411_id[] = {
451 { "adt7411", 0 },
452 { }
453};
454MODULE_DEVICE_TABLE(i2c, adt7411_id);
455
456static struct i2c_driver adt7411_driver = {
457 .driver = {
458 .name = "adt7411",
459 },
460 .probe = adt7411_probe,
461 .id_table = adt7411_id,
462 .detect = adt7411_detect,
463 .address_list = normal_i2c,
464 .class = I2C_CLASS_HWMON,
465};
466
467module_i2c_driver(adt7411_driver);
468
469MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and "
470 "Wolfram Sang <w.sang@pengutronix.de>");
471MODULE_DESCRIPTION("ADT7411 driver");
472MODULE_LICENSE("GPL v2");
1/*
2 * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
3 *
4 * Copyright (C) 2008, 2010 Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * TODO: SPI, support for external temperature sensor
11 * use power-down mode for suspend?, interrupt handling?
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/err.h>
18#include <linux/mutex.h>
19#include <linux/jiffies.h>
20#include <linux/i2c.h>
21#include <linux/hwmon.h>
22#include <linux/hwmon-sysfs.h>
23#include <linux/slab.h>
24
25#define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
26#define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
27#define ADT7411_REG_VDD_MSB 0x06
28#define ADT7411_REG_INT_TEMP_MSB 0x07
29#define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
30
31#define ADT7411_REG_CFG1 0x18
32#define ADT7411_CFG1_START_MONITOR (1 << 0)
33
34#define ADT7411_REG_CFG2 0x19
35#define ADT7411_CFG2_DISABLE_AVG (1 << 5)
36
37#define ADT7411_REG_CFG3 0x1a
38#define ADT7411_CFG3_ADC_CLK_225 (1 << 0)
39#define ADT7411_CFG3_REF_VDD (1 << 4)
40
41#define ADT7411_REG_DEVICE_ID 0x4d
42#define ADT7411_REG_MANUFACTURER_ID 0x4e
43
44#define ADT7411_DEVICE_ID 0x2
45#define ADT7411_MANUFACTURER_ID 0x41
46
47static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
48
49struct adt7411_data {
50 struct mutex device_lock; /* for "atomic" device accesses */
51 struct mutex update_lock;
52 unsigned long next_update;
53 int vref_cached;
54 struct i2c_client *client;
55};
56
57/*
58 * When reading a register containing (up to 4) lsb, all associated
59 * msb-registers get locked by the hardware. After _one_ of those msb is read,
60 * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
61 * is protected here with a mutex, too.
62 */
63static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
64 u8 msb_reg, u8 lsb_shift)
65{
66 struct adt7411_data *data = i2c_get_clientdata(client);
67 int val, tmp;
68
69 mutex_lock(&data->device_lock);
70
71 val = i2c_smbus_read_byte_data(client, lsb_reg);
72 if (val < 0)
73 goto exit_unlock;
74
75 tmp = (val >> lsb_shift) & 3;
76 val = i2c_smbus_read_byte_data(client, msb_reg);
77
78 if (val >= 0)
79 val = (val << 2) | tmp;
80
81 exit_unlock:
82 mutex_unlock(&data->device_lock);
83
84 return val;
85}
86
87static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
88 bool flag)
89{
90 struct adt7411_data *data = i2c_get_clientdata(client);
91 int ret, val;
92
93 mutex_lock(&data->device_lock);
94
95 ret = i2c_smbus_read_byte_data(client, reg);
96 if (ret < 0)
97 goto exit_unlock;
98
99 if (flag)
100 val = ret | bit;
101 else
102 val = ret & ~bit;
103
104 ret = i2c_smbus_write_byte_data(client, reg, val);
105
106 exit_unlock:
107 mutex_unlock(&data->device_lock);
108 return ret;
109}
110
111static ssize_t adt7411_show_vdd(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 struct adt7411_data *data = dev_get_drvdata(dev);
115 struct i2c_client *client = data->client;
116 int ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
117 ADT7411_REG_VDD_MSB, 2);
118
119 return ret < 0 ? ret : sprintf(buf, "%u\n", ret * 7000 / 1024);
120}
121
122static ssize_t adt7411_show_temp(struct device *dev,
123 struct device_attribute *attr, char *buf)
124{
125 struct adt7411_data *data = dev_get_drvdata(dev);
126 struct i2c_client *client = data->client;
127 int val = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
128 ADT7411_REG_INT_TEMP_MSB, 0);
129
130 if (val < 0)
131 return val;
132
133 val = val & 0x200 ? val - 0x400 : val; /* 10 bit signed */
134
135 return sprintf(buf, "%d\n", val * 250);
136}
137
138static ssize_t adt7411_show_input(struct device *dev,
139 struct device_attribute *attr, char *buf)
140{
141 int nr = to_sensor_dev_attr(attr)->index;
142 struct adt7411_data *data = dev_get_drvdata(dev);
143 struct i2c_client *client = data->client;
144 int val;
145 u8 lsb_reg, lsb_shift;
146
147 mutex_lock(&data->update_lock);
148 if (time_after_eq(jiffies, data->next_update)) {
149 val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
150 if (val < 0)
151 goto exit_unlock;
152
153 if (val & ADT7411_CFG3_REF_VDD) {
154 val = adt7411_read_10_bit(client,
155 ADT7411_REG_INT_TEMP_VDD_LSB,
156 ADT7411_REG_VDD_MSB, 2);
157 if (val < 0)
158 goto exit_unlock;
159
160 data->vref_cached = val * 7000 / 1024;
161 } else {
162 data->vref_cached = 2250;
163 }
164
165 data->next_update = jiffies + HZ;
166 }
167
168 lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
169 lsb_shift = 2 * (nr & 0x03);
170 val = adt7411_read_10_bit(client, lsb_reg,
171 ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, lsb_shift);
172 if (val < 0)
173 goto exit_unlock;
174
175 val = sprintf(buf, "%u\n", val * data->vref_cached / 1024);
176 exit_unlock:
177 mutex_unlock(&data->update_lock);
178 return val;
179}
180
181static ssize_t adt7411_show_bit(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
185 struct adt7411_data *data = dev_get_drvdata(dev);
186 struct i2c_client *client = data->client;
187 int ret = i2c_smbus_read_byte_data(client, attr2->index);
188
189 return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
190}
191
192static ssize_t adt7411_set_bit(struct device *dev,
193 struct device_attribute *attr, const char *buf,
194 size_t count)
195{
196 struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
197 struct adt7411_data *data = dev_get_drvdata(dev);
198 struct i2c_client *client = data->client;
199 int ret;
200 unsigned long flag;
201
202 ret = kstrtoul(buf, 0, &flag);
203 if (ret || flag > 1)
204 return -EINVAL;
205
206 ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
207
208 /* force update */
209 mutex_lock(&data->update_lock);
210 data->next_update = jiffies;
211 mutex_unlock(&data->update_lock);
212
213 return ret < 0 ? ret : count;
214}
215
216#define ADT7411_BIT_ATTR(__name, __reg, __bit) \
217 SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
218 adt7411_set_bit, __bit, __reg)
219
220static DEVICE_ATTR(temp1_input, S_IRUGO, adt7411_show_temp, NULL);
221static DEVICE_ATTR(in0_input, S_IRUGO, adt7411_show_vdd, NULL);
222static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, adt7411_show_input, NULL, 0);
223static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, adt7411_show_input, NULL, 1);
224static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, adt7411_show_input, NULL, 2);
225static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, adt7411_show_input, NULL, 3);
226static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, adt7411_show_input, NULL, 4);
227static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, adt7411_show_input, NULL, 5);
228static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, adt7411_show_input, NULL, 6);
229static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, adt7411_show_input, NULL, 7);
230static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
231static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
232static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
233
234static struct attribute *adt7411_attrs[] = {
235 &dev_attr_temp1_input.attr,
236 &dev_attr_in0_input.attr,
237 &sensor_dev_attr_in1_input.dev_attr.attr,
238 &sensor_dev_attr_in2_input.dev_attr.attr,
239 &sensor_dev_attr_in3_input.dev_attr.attr,
240 &sensor_dev_attr_in4_input.dev_attr.attr,
241 &sensor_dev_attr_in5_input.dev_attr.attr,
242 &sensor_dev_attr_in6_input.dev_attr.attr,
243 &sensor_dev_attr_in7_input.dev_attr.attr,
244 &sensor_dev_attr_in8_input.dev_attr.attr,
245 &sensor_dev_attr_no_average.dev_attr.attr,
246 &sensor_dev_attr_fast_sampling.dev_attr.attr,
247 &sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
248 NULL
249};
250
251ATTRIBUTE_GROUPS(adt7411);
252
253static int adt7411_detect(struct i2c_client *client,
254 struct i2c_board_info *info)
255{
256 int val;
257
258 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
259 return -ENODEV;
260
261 val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
262 if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
263 dev_dbg(&client->dev,
264 "Wrong manufacturer ID. Got %d, expected %d\n",
265 val, ADT7411_MANUFACTURER_ID);
266 return -ENODEV;
267 }
268
269 val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
270 if (val < 0 || val != ADT7411_DEVICE_ID) {
271 dev_dbg(&client->dev,
272 "Wrong device ID. Got %d, expected %d\n",
273 val, ADT7411_DEVICE_ID);
274 return -ENODEV;
275 }
276
277 strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
278
279 return 0;
280}
281
282static int adt7411_probe(struct i2c_client *client,
283 const struct i2c_device_id *id)
284{
285 struct device *dev = &client->dev;
286 struct adt7411_data *data;
287 struct device *hwmon_dev;
288 int ret;
289
290 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
291 if (!data)
292 return -ENOMEM;
293
294 i2c_set_clientdata(client, data);
295 data->client = client;
296 mutex_init(&data->device_lock);
297 mutex_init(&data->update_lock);
298
299 ret = adt7411_modify_bit(client, ADT7411_REG_CFG1,
300 ADT7411_CFG1_START_MONITOR, 1);
301 if (ret < 0)
302 return ret;
303
304 /* force update on first occasion */
305 data->next_update = jiffies;
306
307 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
308 data,
309 adt7411_groups);
310 return PTR_ERR_OR_ZERO(hwmon_dev);
311}
312
313static const struct i2c_device_id adt7411_id[] = {
314 { "adt7411", 0 },
315 { }
316};
317MODULE_DEVICE_TABLE(i2c, adt7411_id);
318
319static struct i2c_driver adt7411_driver = {
320 .driver = {
321 .name = "adt7411",
322 },
323 .probe = adt7411_probe,
324 .id_table = adt7411_id,
325 .detect = adt7411_detect,
326 .address_list = normal_i2c,
327 .class = I2C_CLASS_HWMON,
328};
329
330module_i2c_driver(adt7411_driver);
331
332MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and "
333 "Wolfram Sang <w.sang@pengutronix.de>");
334MODULE_DESCRIPTION("ADT7411 driver");
335MODULE_LICENSE("GPL v2");