Commit | Line | Data |
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a5d8c6bc SZ |
1 | /* |
2 | * ADT7310 digital temperature sensor driver supporting ADT7310 | |
3 | * | |
4 | * Copyright 2010 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/interrupt.h> | |
a5d8c6bc SZ |
10 | #include <linux/device.h> |
11 | #include <linux/kernel.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/sysfs.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/spi/spi.h> | |
99c97852 | 16 | #include <linux/module.h> |
a5d8c6bc SZ |
17 | |
18 | #include "../iio.h" | |
19 | #include "../sysfs.h" | |
20 | ||
21 | /* | |
22 | * ADT7310 registers definition | |
23 | */ | |
24 | ||
25 | #define ADT7310_STATUS 0 | |
26 | #define ADT7310_CONFIG 1 | |
27 | #define ADT7310_TEMPERATURE 2 | |
28 | #define ADT7310_ID 3 | |
29 | #define ADT7310_T_CRIT 4 | |
30 | #define ADT7310_T_HYST 5 | |
31 | #define ADT7310_T_ALARM_HIGH 6 | |
32 | #define ADT7310_T_ALARM_LOW 7 | |
33 | ||
34 | /* | |
35 | * ADT7310 status | |
36 | */ | |
37 | #define ADT7310_STAT_T_LOW 0x10 | |
38 | #define ADT7310_STAT_T_HIGH 0x20 | |
39 | #define ADT7310_STAT_T_CRIT 0x40 | |
40 | #define ADT7310_STAT_NOT_RDY 0x80 | |
41 | ||
42 | /* | |
43 | * ADT7310 config | |
44 | */ | |
45 | #define ADT7310_FAULT_QUEUE_MASK 0x3 | |
46 | #define ADT7310_CT_POLARITY 0x4 | |
47 | #define ADT7310_INT_POLARITY 0x8 | |
48 | #define ADT7310_EVENT_MODE 0x10 | |
49 | #define ADT7310_MODE_MASK 0x60 | |
50 | #define ADT7310_ONESHOT 0x20 | |
51 | #define ADT7310_SPS 0x40 | |
52 | #define ADT7310_PD 0x60 | |
53 | #define ADT7310_RESOLUTION 0x80 | |
54 | ||
55 | /* | |
56 | * ADT7310 masks | |
57 | */ | |
58 | #define ADT7310_T16_VALUE_SIGN 0x8000 | |
59 | #define ADT7310_T16_VALUE_FLOAT_OFFSET 7 | |
60 | #define ADT7310_T16_VALUE_FLOAT_MASK 0x7F | |
61 | #define ADT7310_T13_VALUE_SIGN 0x1000 | |
62 | #define ADT7310_T13_VALUE_OFFSET 3 | |
63 | #define ADT7310_T13_VALUE_FLOAT_OFFSET 4 | |
64 | #define ADT7310_T13_VALUE_FLOAT_MASK 0xF | |
65 | #define ADT7310_T_HYST_MASK 0xF | |
66 | #define ADT7310_DEVICE_ID_MASK 0x7 | |
67 | #define ADT7310_MANUFACTORY_ID_MASK 0xF8 | |
68 | #define ADT7310_MANUFACTORY_ID_OFFSET 3 | |
69 | ||
70 | ||
71 | #define ADT7310_CMD_REG_MASK 0x28 | |
72 | #define ADT7310_CMD_REG_OFFSET 3 | |
73 | #define ADT7310_CMD_READ 0x40 | |
74 | #define ADT7310_CMD_CON_READ 0x4 | |
75 | ||
76 | #define ADT7310_IRQS 2 | |
77 | ||
78 | /* | |
79 | * struct adt7310_chip_info - chip specifc information | |
80 | */ | |
81 | ||
82 | struct adt7310_chip_info { | |
a5d8c6bc | 83 | struct spi_device *spi_dev; |
a5d8c6bc SZ |
84 | u8 config; |
85 | }; | |
86 | ||
87 | /* | |
88 | * adt7310 register access by SPI | |
89 | */ | |
90 | ||
91 | static int adt7310_spi_read_word(struct adt7310_chip_info *chip, u8 reg, u16 *data) | |
92 | { | |
93 | struct spi_device *spi_dev = chip->spi_dev; | |
94 | u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; | |
95 | int ret = 0; | |
96 | ||
97 | command |= ADT7310_CMD_READ; | |
98 | ret = spi_write(spi_dev, &command, sizeof(command)); | |
99 | if (ret < 0) { | |
100 | dev_err(&spi_dev->dev, "SPI write command error\n"); | |
101 | return ret; | |
102 | } | |
103 | ||
104 | ret = spi_read(spi_dev, (u8 *)data, sizeof(*data)); | |
105 | if (ret < 0) { | |
106 | dev_err(&spi_dev->dev, "SPI read word error\n"); | |
107 | return ret; | |
108 | } | |
109 | ||
110 | *data = be16_to_cpu(*data); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int adt7310_spi_write_word(struct adt7310_chip_info *chip, u8 reg, u16 data) | |
116 | { | |
117 | struct spi_device *spi_dev = chip->spi_dev; | |
118 | u8 buf[3]; | |
119 | int ret = 0; | |
120 | ||
121 | buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; | |
122 | buf[1] = (u8)(data >> 8); | |
123 | buf[2] = (u8)(data & 0xFF); | |
124 | ||
125 | ret = spi_write(spi_dev, buf, 3); | |
126 | if (ret < 0) { | |
127 | dev_err(&spi_dev->dev, "SPI write word error\n"); | |
128 | return ret; | |
129 | } | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | static int adt7310_spi_read_byte(struct adt7310_chip_info *chip, u8 reg, u8 *data) | |
135 | { | |
136 | struct spi_device *spi_dev = chip->spi_dev; | |
137 | u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; | |
138 | int ret = 0; | |
139 | ||
140 | command |= ADT7310_CMD_READ; | |
141 | ret = spi_write(spi_dev, &command, sizeof(command)); | |
142 | if (ret < 0) { | |
143 | dev_err(&spi_dev->dev, "SPI write command error\n"); | |
144 | return ret; | |
145 | } | |
146 | ||
147 | ret = spi_read(spi_dev, data, sizeof(*data)); | |
148 | if (ret < 0) { | |
149 | dev_err(&spi_dev->dev, "SPI read byte error\n"); | |
150 | return ret; | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static int adt7310_spi_write_byte(struct adt7310_chip_info *chip, u8 reg, u8 data) | |
157 | { | |
158 | struct spi_device *spi_dev = chip->spi_dev; | |
159 | u8 buf[2]; | |
160 | int ret = 0; | |
161 | ||
162 | buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; | |
163 | buf[1] = data; | |
164 | ||
165 | ret = spi_write(spi_dev, buf, 2); | |
166 | if (ret < 0) { | |
167 | dev_err(&spi_dev->dev, "SPI write byte error\n"); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static ssize_t adt7310_show_mode(struct device *dev, | |
175 | struct device_attribute *attr, | |
176 | char *buf) | |
177 | { | |
178 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 179 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
180 | u8 config; |
181 | ||
182 | config = chip->config & ADT7310_MODE_MASK; | |
183 | ||
184 | switch (config) { | |
185 | case ADT7310_PD: | |
186 | return sprintf(buf, "power-down\n"); | |
187 | case ADT7310_ONESHOT: | |
188 | return sprintf(buf, "one-shot\n"); | |
189 | case ADT7310_SPS: | |
190 | return sprintf(buf, "sps\n"); | |
191 | default: | |
192 | return sprintf(buf, "full\n"); | |
193 | } | |
194 | } | |
195 | ||
196 | static ssize_t adt7310_store_mode(struct device *dev, | |
197 | struct device_attribute *attr, | |
198 | const char *buf, | |
199 | size_t len) | |
200 | { | |
201 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 202 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
203 | u16 config; |
204 | int ret; | |
205 | ||
206 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
207 | if (ret) | |
208 | return -EIO; | |
209 | ||
210 | config = chip->config & (~ADT7310_MODE_MASK); | |
211 | if (strcmp(buf, "power-down")) | |
212 | config |= ADT7310_PD; | |
213 | else if (strcmp(buf, "one-shot")) | |
214 | config |= ADT7310_ONESHOT; | |
215 | else if (strcmp(buf, "sps")) | |
216 | config |= ADT7310_SPS; | |
217 | ||
218 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); | |
219 | if (ret) | |
220 | return -EIO; | |
221 | ||
222 | chip->config = config; | |
223 | ||
224 | return len; | |
225 | } | |
226 | ||
227 | static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, | |
228 | adt7310_show_mode, | |
229 | adt7310_store_mode, | |
230 | 0); | |
231 | ||
232 | static ssize_t adt7310_show_available_modes(struct device *dev, | |
233 | struct device_attribute *attr, | |
234 | char *buf) | |
235 | { | |
236 | return sprintf(buf, "full\none-shot\nsps\npower-down\n"); | |
237 | } | |
238 | ||
239 | static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7310_show_available_modes, NULL, 0); | |
240 | ||
241 | static ssize_t adt7310_show_resolution(struct device *dev, | |
242 | struct device_attribute *attr, | |
243 | char *buf) | |
244 | { | |
245 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 246 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
247 | int ret; |
248 | int bits; | |
249 | ||
250 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
251 | if (ret) | |
252 | return -EIO; | |
253 | ||
254 | if (chip->config & ADT7310_RESOLUTION) | |
255 | bits = 16; | |
256 | else | |
257 | bits = 13; | |
258 | ||
259 | return sprintf(buf, "%d bits\n", bits); | |
260 | } | |
261 | ||
262 | static ssize_t adt7310_store_resolution(struct device *dev, | |
263 | struct device_attribute *attr, | |
264 | const char *buf, | |
265 | size_t len) | |
266 | { | |
267 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 268 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
269 | unsigned long data; |
270 | u16 config; | |
271 | int ret; | |
272 | ||
273 | ret = strict_strtoul(buf, 10, &data); | |
274 | if (ret) | |
275 | return -EINVAL; | |
276 | ||
277 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
278 | if (ret) | |
279 | return -EIO; | |
280 | ||
281 | config = chip->config & (~ADT7310_RESOLUTION); | |
282 | if (data) | |
283 | config |= ADT7310_RESOLUTION; | |
284 | ||
285 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); | |
286 | if (ret) | |
287 | return -EIO; | |
288 | ||
289 | chip->config = config; | |
290 | ||
291 | return len; | |
292 | } | |
293 | ||
294 | static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR, | |
295 | adt7310_show_resolution, | |
296 | adt7310_store_resolution, | |
297 | 0); | |
298 | ||
299 | static ssize_t adt7310_show_id(struct device *dev, | |
300 | struct device_attribute *attr, | |
301 | char *buf) | |
302 | { | |
303 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 304 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
305 | u8 id; |
306 | int ret; | |
307 | ||
308 | ret = adt7310_spi_read_byte(chip, ADT7310_ID, &id); | |
309 | if (ret) | |
310 | return -EIO; | |
311 | ||
312 | return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n", | |
313 | id & ADT7310_DEVICE_ID_MASK, | |
314 | (id & ADT7310_MANUFACTORY_ID_MASK) >> ADT7310_MANUFACTORY_ID_OFFSET); | |
315 | } | |
316 | ||
317 | static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR, | |
318 | adt7310_show_id, | |
319 | NULL, | |
320 | 0); | |
321 | ||
322 | static ssize_t adt7310_convert_temperature(struct adt7310_chip_info *chip, | |
323 | u16 data, char *buf) | |
324 | { | |
325 | char sign = ' '; | |
326 | ||
327 | if (chip->config & ADT7310_RESOLUTION) { | |
328 | if (data & ADT7310_T16_VALUE_SIGN) { | |
329 | /* convert supplement to positive value */ | |
330 | data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); | |
331 | sign = '-'; | |
332 | } | |
333 | return sprintf(buf, "%c%d.%.7d\n", sign, | |
334 | (data >> ADT7310_T16_VALUE_FLOAT_OFFSET), | |
335 | (data & ADT7310_T16_VALUE_FLOAT_MASK) * 78125); | |
336 | } else { | |
337 | if (data & ADT7310_T13_VALUE_SIGN) { | |
338 | /* convert supplement to positive value */ | |
339 | data >>= ADT7310_T13_VALUE_OFFSET; | |
340 | data = (ADT7310_T13_VALUE_SIGN << 1) - data; | |
341 | sign = '-'; | |
342 | } | |
343 | return sprintf(buf, "%c%d.%.4d\n", sign, | |
344 | (data >> ADT7310_T13_VALUE_FLOAT_OFFSET), | |
345 | (data & ADT7310_T13_VALUE_FLOAT_MASK) * 625); | |
346 | } | |
347 | } | |
348 | ||
349 | static ssize_t adt7310_show_value(struct device *dev, | |
350 | struct device_attribute *attr, | |
351 | char *buf) | |
352 | { | |
353 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 354 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
355 | u8 status; |
356 | u16 data; | |
357 | int ret, i = 0; | |
358 | ||
359 | do { | |
360 | ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); | |
361 | if (ret) | |
362 | return -EIO; | |
363 | i++; | |
364 | if (i == 10000) | |
365 | return -EIO; | |
366 | } while (status & ADT7310_STAT_NOT_RDY); | |
367 | ||
368 | ret = adt7310_spi_read_word(chip, ADT7310_TEMPERATURE, &data); | |
369 | if (ret) | |
370 | return -EIO; | |
371 | ||
372 | return adt7310_convert_temperature(chip, data, buf); | |
373 | } | |
374 | ||
375 | static IIO_DEVICE_ATTR(value, S_IRUGO, adt7310_show_value, NULL, 0); | |
376 | ||
a5d8c6bc SZ |
377 | static struct attribute *adt7310_attributes[] = { |
378 | &iio_dev_attr_available_modes.dev_attr.attr, | |
379 | &iio_dev_attr_mode.dev_attr.attr, | |
380 | &iio_dev_attr_resolution.dev_attr.attr, | |
381 | &iio_dev_attr_id.dev_attr.attr, | |
382 | &iio_dev_attr_value.dev_attr.attr, | |
a5d8c6bc SZ |
383 | NULL, |
384 | }; | |
385 | ||
386 | static const struct attribute_group adt7310_attribute_group = { | |
387 | .attrs = adt7310_attributes, | |
388 | }; | |
389 | ||
cda0b2af | 390 | static irqreturn_t adt7310_event_handler(int irq, void *private) |
a5d8c6bc | 391 | { |
cda0b2af | 392 | struct iio_dev *indio_dev = private; |
7978f9f8 | 393 | struct adt7310_chip_info *chip = iio_priv(indio_dev); |
cda0b2af | 394 | s64 timestamp = iio_get_time_ns(); |
a5d8c6bc | 395 | u8 status; |
cda0b2af | 396 | int ret; |
a5d8c6bc | 397 | |
cda0b2af JC |
398 | ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); |
399 | if (ret) | |
400 | return ret; | |
a5d8c6bc SZ |
401 | |
402 | if (status & ADT7310_STAT_T_HIGH) | |
5aa96188 | 403 | iio_push_event(indio_dev, |
e7a2c323 JC |
404 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
405 | IIO_EV_TYPE_THRESH, | |
406 | IIO_EV_DIR_RISING), | |
407 | timestamp); | |
a5d8c6bc | 408 | if (status & ADT7310_STAT_T_LOW) |
5aa96188 | 409 | iio_push_event(indio_dev, |
e7a2c323 JC |
410 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
411 | IIO_EV_TYPE_THRESH, | |
412 | IIO_EV_DIR_FALLING), | |
413 | timestamp); | |
a5d8c6bc | 414 | if (status & ADT7310_STAT_T_CRIT) |
5aa96188 | 415 | iio_push_event(indio_dev, |
e7a2c323 JC |
416 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, |
417 | IIO_EV_TYPE_THRESH, | |
418 | IIO_EV_DIR_RISING), | |
cda0b2af JC |
419 | timestamp); |
420 | return IRQ_HANDLED; | |
a5d8c6bc SZ |
421 | } |
422 | ||
a5d8c6bc SZ |
423 | static ssize_t adt7310_show_event_mode(struct device *dev, |
424 | struct device_attribute *attr, | |
425 | char *buf) | |
426 | { | |
427 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 428 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
429 | int ret; |
430 | ||
431 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
432 | if (ret) | |
433 | return -EIO; | |
434 | ||
435 | if (chip->config & ADT7310_EVENT_MODE) | |
436 | return sprintf(buf, "interrupt\n"); | |
437 | else | |
438 | return sprintf(buf, "comparator\n"); | |
439 | } | |
440 | ||
441 | static ssize_t adt7310_set_event_mode(struct device *dev, | |
442 | struct device_attribute *attr, | |
443 | const char *buf, | |
444 | size_t len) | |
445 | { | |
446 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 447 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
448 | u16 config; |
449 | int ret; | |
450 | ||
451 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
452 | if (ret) | |
453 | return -EIO; | |
454 | ||
455 | config = chip->config &= ~ADT7310_EVENT_MODE; | |
456 | if (strcmp(buf, "comparator") != 0) | |
457 | config |= ADT7310_EVENT_MODE; | |
458 | ||
459 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); | |
460 | if (ret) | |
461 | return -EIO; | |
462 | ||
463 | chip->config = config; | |
464 | ||
465 | return len; | |
466 | } | |
467 | ||
468 | static ssize_t adt7310_show_available_event_modes(struct device *dev, | |
469 | struct device_attribute *attr, | |
470 | char *buf) | |
471 | { | |
472 | return sprintf(buf, "comparator\ninterrupt\n"); | |
473 | } | |
474 | ||
475 | static ssize_t adt7310_show_fault_queue(struct device *dev, | |
476 | struct device_attribute *attr, | |
477 | char *buf) | |
478 | { | |
479 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 480 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
481 | int ret; |
482 | ||
483 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
484 | if (ret) | |
485 | return -EIO; | |
486 | ||
487 | return sprintf(buf, "%d\n", chip->config & ADT7310_FAULT_QUEUE_MASK); | |
488 | } | |
489 | ||
490 | static ssize_t adt7310_set_fault_queue(struct device *dev, | |
491 | struct device_attribute *attr, | |
492 | const char *buf, | |
493 | size_t len) | |
494 | { | |
495 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 496 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
497 | unsigned long data; |
498 | int ret; | |
499 | u8 config; | |
500 | ||
501 | ret = strict_strtoul(buf, 10, &data); | |
502 | if (ret || data > 3) | |
503 | return -EINVAL; | |
504 | ||
505 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); | |
506 | if (ret) | |
507 | return -EIO; | |
508 | ||
509 | config = chip->config & ~ADT7310_FAULT_QUEUE_MASK; | |
510 | config |= data; | |
511 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); | |
512 | if (ret) | |
513 | return -EIO; | |
514 | ||
515 | chip->config = config; | |
516 | ||
517 | return len; | |
518 | } | |
519 | ||
520 | static inline ssize_t adt7310_show_t_bound(struct device *dev, | |
521 | struct device_attribute *attr, | |
522 | u8 bound_reg, | |
523 | char *buf) | |
524 | { | |
525 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 526 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
527 | u16 data; |
528 | int ret; | |
529 | ||
530 | ret = adt7310_spi_read_word(chip, bound_reg, &data); | |
531 | if (ret) | |
532 | return -EIO; | |
533 | ||
534 | return adt7310_convert_temperature(chip, data, buf); | |
535 | } | |
536 | ||
537 | static inline ssize_t adt7310_set_t_bound(struct device *dev, | |
538 | struct device_attribute *attr, | |
539 | u8 bound_reg, | |
540 | const char *buf, | |
541 | size_t len) | |
542 | { | |
543 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 544 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
545 | long tmp1, tmp2; |
546 | u16 data; | |
547 | char *pos; | |
548 | int ret; | |
549 | ||
550 | pos = strchr(buf, '.'); | |
551 | ||
552 | ret = strict_strtol(buf, 10, &tmp1); | |
553 | ||
554 | if (ret || tmp1 > 127 || tmp1 < -128) | |
555 | return -EINVAL; | |
556 | ||
557 | if (pos) { | |
558 | len = strlen(pos); | |
559 | ||
560 | if (chip->config & ADT7310_RESOLUTION) { | |
561 | if (len > ADT7310_T16_VALUE_FLOAT_OFFSET) | |
562 | len = ADT7310_T16_VALUE_FLOAT_OFFSET; | |
563 | pos[len] = 0; | |
564 | ret = strict_strtol(pos, 10, &tmp2); | |
565 | ||
566 | if (!ret) | |
567 | tmp2 = (tmp2 / 78125) * 78125; | |
568 | } else { | |
569 | if (len > ADT7310_T13_VALUE_FLOAT_OFFSET) | |
570 | len = ADT7310_T13_VALUE_FLOAT_OFFSET; | |
571 | pos[len] = 0; | |
572 | ret = strict_strtol(pos, 10, &tmp2); | |
573 | ||
574 | if (!ret) | |
575 | tmp2 = (tmp2 / 625) * 625; | |
576 | } | |
577 | } | |
578 | ||
579 | if (tmp1 < 0) | |
580 | data = (u16)(-tmp1); | |
581 | else | |
582 | data = (u16)tmp1; | |
583 | ||
584 | if (chip->config & ADT7310_RESOLUTION) { | |
585 | data = (data << ADT7310_T16_VALUE_FLOAT_OFFSET) | | |
586 | (tmp2 & ADT7310_T16_VALUE_FLOAT_MASK); | |
587 | ||
588 | if (tmp1 < 0) | |
589 | /* convert positive value to supplyment */ | |
590 | data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); | |
591 | } else { | |
592 | data = (data << ADT7310_T13_VALUE_FLOAT_OFFSET) | | |
593 | (tmp2 & ADT7310_T13_VALUE_FLOAT_MASK); | |
594 | ||
595 | if (tmp1 < 0) | |
596 | /* convert positive value to supplyment */ | |
597 | data = (ADT7310_T13_VALUE_SIGN << 1) - data; | |
598 | data <<= ADT7310_T13_VALUE_OFFSET; | |
599 | } | |
600 | ||
601 | ret = adt7310_spi_write_word(chip, bound_reg, data); | |
602 | if (ret) | |
603 | return -EIO; | |
604 | ||
605 | return len; | |
606 | } | |
607 | ||
608 | static ssize_t adt7310_show_t_alarm_high(struct device *dev, | |
609 | struct device_attribute *attr, | |
610 | char *buf) | |
611 | { | |
612 | return adt7310_show_t_bound(dev, attr, | |
613 | ADT7310_T_ALARM_HIGH, buf); | |
614 | } | |
615 | ||
616 | static inline ssize_t adt7310_set_t_alarm_high(struct device *dev, | |
617 | struct device_attribute *attr, | |
618 | const char *buf, | |
619 | size_t len) | |
620 | { | |
621 | return adt7310_set_t_bound(dev, attr, | |
622 | ADT7310_T_ALARM_HIGH, buf, len); | |
623 | } | |
624 | ||
625 | static ssize_t adt7310_show_t_alarm_low(struct device *dev, | |
626 | struct device_attribute *attr, | |
627 | char *buf) | |
628 | { | |
629 | return adt7310_show_t_bound(dev, attr, | |
630 | ADT7310_T_ALARM_LOW, buf); | |
631 | } | |
632 | ||
633 | static inline ssize_t adt7310_set_t_alarm_low(struct device *dev, | |
634 | struct device_attribute *attr, | |
635 | const char *buf, | |
636 | size_t len) | |
637 | { | |
638 | return adt7310_set_t_bound(dev, attr, | |
639 | ADT7310_T_ALARM_LOW, buf, len); | |
640 | } | |
641 | ||
642 | static ssize_t adt7310_show_t_crit(struct device *dev, | |
643 | struct device_attribute *attr, | |
644 | char *buf) | |
645 | { | |
646 | return adt7310_show_t_bound(dev, attr, | |
647 | ADT7310_T_CRIT, buf); | |
648 | } | |
649 | ||
650 | static inline ssize_t adt7310_set_t_crit(struct device *dev, | |
651 | struct device_attribute *attr, | |
652 | const char *buf, | |
653 | size_t len) | |
654 | { | |
655 | return adt7310_set_t_bound(dev, attr, | |
656 | ADT7310_T_CRIT, buf, len); | |
657 | } | |
658 | ||
659 | static ssize_t adt7310_show_t_hyst(struct device *dev, | |
660 | struct device_attribute *attr, | |
661 | char *buf) | |
662 | { | |
663 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 664 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
665 | int ret; |
666 | u8 t_hyst; | |
667 | ||
668 | ret = adt7310_spi_read_byte(chip, ADT7310_T_HYST, &t_hyst); | |
669 | if (ret) | |
670 | return -EIO; | |
671 | ||
672 | return sprintf(buf, "%d\n", t_hyst & ADT7310_T_HYST_MASK); | |
673 | } | |
674 | ||
675 | static inline ssize_t adt7310_set_t_hyst(struct device *dev, | |
676 | struct device_attribute *attr, | |
677 | const char *buf, | |
678 | size_t len) | |
679 | { | |
680 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
7978f9f8 | 681 | struct adt7310_chip_info *chip = iio_priv(dev_info); |
a5d8c6bc SZ |
682 | int ret; |
683 | unsigned long data; | |
684 | u8 t_hyst; | |
685 | ||
686 | ret = strict_strtol(buf, 10, &data); | |
687 | ||
688 | if (ret || data > ADT7310_T_HYST_MASK) | |
689 | return -EINVAL; | |
690 | ||
691 | t_hyst = (u8)data; | |
692 | ||
693 | ret = adt7310_spi_write_byte(chip, ADT7310_T_HYST, t_hyst); | |
694 | if (ret) | |
695 | return -EIO; | |
696 | ||
697 | return len; | |
698 | } | |
699 | ||
cda0b2af JC |
700 | static IIO_DEVICE_ATTR(event_mode, |
701 | S_IRUGO | S_IWUSR, | |
702 | adt7310_show_event_mode, adt7310_set_event_mode, 0); | |
703 | static IIO_DEVICE_ATTR(available_event_modes, | |
704 | S_IRUGO | S_IWUSR, | |
705 | adt7310_show_available_event_modes, NULL, 0); | |
706 | static IIO_DEVICE_ATTR(fault_queue, | |
707 | S_IRUGO | S_IWUSR, | |
708 | adt7310_show_fault_queue, adt7310_set_fault_queue, 0); | |
709 | static IIO_DEVICE_ATTR(t_alarm_high, | |
710 | S_IRUGO | S_IWUSR, | |
711 | adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0); | |
712 | static IIO_DEVICE_ATTR(t_alarm_low, | |
713 | S_IRUGO | S_IWUSR, | |
714 | adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0); | |
715 | static IIO_DEVICE_ATTR(t_crit, | |
716 | S_IRUGO | S_IWUSR, | |
717 | adt7310_show_t_crit, adt7310_set_t_crit, 0); | |
718 | static IIO_DEVICE_ATTR(t_hyst, | |
719 | S_IRUGO | S_IWUSR, | |
720 | adt7310_show_t_hyst, adt7310_set_t_hyst, 0); | |
a5d8c6bc SZ |
721 | |
722 | static struct attribute *adt7310_event_int_attributes[] = { | |
cda0b2af JC |
723 | &iio_dev_attr_event_mode.dev_attr.attr, |
724 | &iio_dev_attr_available_event_modes.dev_attr.attr, | |
725 | &iio_dev_attr_fault_queue.dev_attr.attr, | |
726 | &iio_dev_attr_t_alarm_high.dev_attr.attr, | |
727 | &iio_dev_attr_t_alarm_low.dev_attr.attr, | |
728 | &iio_dev_attr_t_hyst.dev_attr.attr, | |
a5d8c6bc SZ |
729 | NULL, |
730 | }; | |
731 | ||
732 | static struct attribute *adt7310_event_ct_attributes[] = { | |
cda0b2af JC |
733 | &iio_dev_attr_event_mode.dev_attr.attr, |
734 | &iio_dev_attr_available_event_modes.dev_attr.attr, | |
735 | &iio_dev_attr_fault_queue.dev_attr.attr, | |
736 | &iio_dev_attr_t_crit.dev_attr.attr, | |
737 | &iio_dev_attr_t_hyst.dev_attr.attr, | |
a5d8c6bc SZ |
738 | NULL, |
739 | }; | |
740 | ||
741 | static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = { | |
742 | { | |
743 | .attrs = adt7310_event_int_attributes, | |
8e7d9672 | 744 | .name = "events", |
cda0b2af | 745 | }, { |
a5d8c6bc | 746 | .attrs = adt7310_event_ct_attributes, |
8e7d9672 | 747 | .name = "events", |
a5d8c6bc SZ |
748 | } |
749 | }; | |
750 | ||
6fe8135f JC |
751 | static const struct iio_info adt7310_info = { |
752 | .attrs = &adt7310_attribute_group, | |
6fe8135f JC |
753 | .event_attrs = adt7310_event_attribute_group, |
754 | .driver_module = THIS_MODULE, | |
755 | }; | |
756 | ||
a5d8c6bc SZ |
757 | /* |
758 | * device probe and remove | |
759 | */ | |
760 | ||
761 | static int __devinit adt7310_probe(struct spi_device *spi_dev) | |
762 | { | |
763 | struct adt7310_chip_info *chip; | |
7978f9f8 | 764 | struct iio_dev *indio_dev; |
a5d8c6bc SZ |
765 | int ret = 0; |
766 | unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; | |
767 | unsigned long irq_flags; | |
768 | ||
7978f9f8 JC |
769 | indio_dev = iio_allocate_device(sizeof(*chip)); |
770 | if (indio_dev == NULL) { | |
771 | ret = -ENOMEM; | |
772 | goto error_ret; | |
773 | } | |
774 | chip = iio_priv(indio_dev); | |
a5d8c6bc | 775 | /* this is only used for device removal purposes */ |
7978f9f8 | 776 | dev_set_drvdata(&spi_dev->dev, indio_dev); |
a5d8c6bc SZ |
777 | |
778 | chip->spi_dev = spi_dev; | |
a5d8c6bc | 779 | |
7978f9f8 JC |
780 | indio_dev->dev.parent = &spi_dev->dev; |
781 | indio_dev->name = spi_get_device_id(spi_dev)->name; | |
782 | indio_dev->info = &adt7310_info; | |
783 | indio_dev->modes = INDIO_DIRECT_MODE; | |
a5d8c6bc | 784 | |
a5d8c6bc SZ |
785 | /* CT critcal temperature event. line 0 */ |
786 | if (spi_dev->irq) { | |
787 | if (adt7310_platform_data[2]) | |
788 | irq_flags = adt7310_platform_data[2]; | |
789 | else | |
790 | irq_flags = IRQF_TRIGGER_LOW; | |
cda0b2af JC |
791 | ret = request_threaded_irq(spi_dev->irq, |
792 | NULL, | |
793 | &adt7310_event_handler, | |
794 | irq_flags, | |
7978f9f8 JC |
795 | indio_dev->name, |
796 | indio_dev); | |
a5d8c6bc | 797 | if (ret) |
26d25ae3 | 798 | goto error_free_dev; |
a5d8c6bc SZ |
799 | } |
800 | ||
801 | /* INT bound temperature alarm event. line 1 */ | |
802 | if (adt7310_platform_data[0]) { | |
cda0b2af JC |
803 | ret = request_threaded_irq(adt7310_platform_data[0], |
804 | NULL, | |
805 | &adt7310_event_handler, | |
806 | adt7310_platform_data[1], | |
7978f9f8 JC |
807 | indio_dev->name, |
808 | indio_dev); | |
a5d8c6bc SZ |
809 | if (ret) |
810 | goto error_unreg_ct_irq; | |
a5d8c6bc SZ |
811 | } |
812 | ||
813 | if (spi_dev->irq && adt7310_platform_data[0]) { | |
a5d8c6bc SZ |
814 | ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
815 | if (ret) { | |
816 | ret = -EIO; | |
817 | goto error_unreg_int_irq; | |
818 | } | |
819 | ||
820 | /* set irq polarity low level */ | |
821 | chip->config &= ~ADT7310_CT_POLARITY; | |
822 | ||
823 | if (adt7310_platform_data[1] & IRQF_TRIGGER_HIGH) | |
824 | chip->config |= ADT7310_INT_POLARITY; | |
825 | else | |
826 | chip->config &= ~ADT7310_INT_POLARITY; | |
827 | ||
828 | ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, chip->config); | |
829 | if (ret) { | |
830 | ret = -EIO; | |
831 | goto error_unreg_int_irq; | |
832 | } | |
833 | } | |
834 | ||
26d25ae3 JC |
835 | ret = iio_device_register(indio_dev); |
836 | if (ret) | |
837 | goto error_unreg_int_irq; | |
838 | ||
a5d8c6bc | 839 | dev_info(&spi_dev->dev, "%s temperature sensor registered.\n", |
7978f9f8 | 840 | indio_dev->name); |
a5d8c6bc SZ |
841 | |
842 | return 0; | |
843 | ||
844 | error_unreg_int_irq: | |
7978f9f8 | 845 | free_irq(adt7310_platform_data[0], indio_dev); |
a5d8c6bc | 846 | error_unreg_ct_irq: |
7978f9f8 | 847 | free_irq(spi_dev->irq, indio_dev); |
a5d8c6bc | 848 | error_free_dev: |
7978f9f8 JC |
849 | iio_free_device(indio_dev); |
850 | error_ret: | |
a5d8c6bc SZ |
851 | return ret; |
852 | } | |
853 | ||
854 | static int __devexit adt7310_remove(struct spi_device *spi_dev) | |
855 | { | |
7978f9f8 | 856 | struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev); |
a5d8c6bc SZ |
857 | unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; |
858 | ||
d2fffd6c | 859 | iio_device_unregister(indio_dev); |
a5d8c6bc SZ |
860 | dev_set_drvdata(&spi_dev->dev, NULL); |
861 | if (adt7310_platform_data[0]) | |
7978f9f8 | 862 | free_irq(adt7310_platform_data[0], indio_dev); |
a5d8c6bc | 863 | if (spi_dev->irq) |
7978f9f8 | 864 | free_irq(spi_dev->irq, indio_dev); |
d2fffd6c | 865 | iio_free_device(indio_dev); |
a5d8c6bc SZ |
866 | |
867 | return 0; | |
868 | } | |
869 | ||
870 | static const struct spi_device_id adt7310_id[] = { | |
871 | { "adt7310", 0 }, | |
872 | {} | |
873 | }; | |
874 | ||
875 | MODULE_DEVICE_TABLE(spi, adt7310_id); | |
876 | ||
877 | static struct spi_driver adt7310_driver = { | |
878 | .driver = { | |
879 | .name = "adt7310", | |
880 | .bus = &spi_bus_type, | |
881 | .owner = THIS_MODULE, | |
882 | }, | |
883 | .probe = adt7310_probe, | |
884 | .remove = __devexit_p(adt7310_remove), | |
885 | .id_table = adt7310_id, | |
886 | }; | |
ae6ae6fe | 887 | module_spi_driver(adt7310_driver); |
a5d8c6bc SZ |
888 | |
889 | MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>"); | |
890 | MODULE_DESCRIPTION("Analog Devices ADT7310 digital" | |
891 | " temperature sensor driver"); | |
892 | MODULE_LICENSE("GPL v2"); |