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27dec00e MR |
1 | /* |
2 | * atlas-ph-sensor.c - Support for Atlas Scientific OEM pH-SM sensor | |
3 | * | |
4 | * Copyright (C) 2015 Matt Ranostay <mranostay@gmail.com> | |
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 as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/irq.h> | |
24 | #include <linux/irq_work.h> | |
25 | #include <linux/gpio.h> | |
26 | #include <linux/i2c.h> | |
7103b99b | 27 | #include <linux/of_device.h> |
27dec00e MR |
28 | #include <linux/regmap.h> |
29 | #include <linux/iio/iio.h> | |
30 | #include <linux/iio/buffer.h> | |
31 | #include <linux/iio/trigger.h> | |
32 | #include <linux/iio/trigger_consumer.h> | |
33 | #include <linux/iio/triggered_buffer.h> | |
34 | #include <linux/pm_runtime.h> | |
35 | ||
36 | #define ATLAS_REGMAP_NAME "atlas_ph_regmap" | |
37 | #define ATLAS_DRV_NAME "atlas_ph" | |
38 | ||
39 | #define ATLAS_REG_DEV_TYPE 0x00 | |
40 | #define ATLAS_REG_DEV_VERSION 0x01 | |
41 | ||
42 | #define ATLAS_REG_INT_CONTROL 0x04 | |
43 | #define ATLAS_REG_INT_CONTROL_EN BIT(3) | |
44 | ||
45 | #define ATLAS_REG_PWR_CONTROL 0x06 | |
46 | ||
7103b99b MR |
47 | #define ATLAS_REG_PH_CALIB_STATUS 0x0d |
48 | #define ATLAS_REG_PH_CALIB_STATUS_MASK 0x07 | |
49 | #define ATLAS_REG_PH_CALIB_STATUS_LOW BIT(0) | |
50 | #define ATLAS_REG_PH_CALIB_STATUS_MID BIT(1) | |
51 | #define ATLAS_REG_PH_CALIB_STATUS_HIGH BIT(2) | |
27dec00e | 52 | |
e8dd92bf MR |
53 | #define ATLAS_REG_EC_CALIB_STATUS 0x0f |
54 | #define ATLAS_REG_EC_CALIB_STATUS_MASK 0x0f | |
55 | #define ATLAS_REG_EC_CALIB_STATUS_DRY BIT(0) | |
56 | #define ATLAS_REG_EC_CALIB_STATUS_SINGLE BIT(1) | |
57 | #define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2) | |
58 | #define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3) | |
59 | ||
7103b99b | 60 | #define ATLAS_REG_PH_TEMP_DATA 0x0e |
27dec00e MR |
61 | #define ATLAS_REG_PH_DATA 0x16 |
62 | ||
e8dd92bf MR |
63 | #define ATLAS_REG_EC_PROBE 0x08 |
64 | #define ATLAS_REG_EC_TEMP_DATA 0x10 | |
65 | #define ATLAS_REG_EC_DATA 0x18 | |
66 | #define ATLAS_REG_TDS_DATA 0x1c | |
67 | #define ATLAS_REG_PSS_DATA 0x20 | |
68 | ||
27dec00e | 69 | #define ATLAS_PH_INT_TIME_IN_US 450000 |
e8dd92bf | 70 | #define ATLAS_EC_INT_TIME_IN_US 650000 |
27dec00e | 71 | |
7103b99b MR |
72 | enum { |
73 | ATLAS_PH_SM, | |
e8dd92bf | 74 | ATLAS_EC_SM, |
7103b99b MR |
75 | }; |
76 | ||
27dec00e MR |
77 | struct atlas_data { |
78 | struct i2c_client *client; | |
79 | struct iio_trigger *trig; | |
7103b99b | 80 | struct atlas_device *chip; |
27dec00e MR |
81 | struct regmap *regmap; |
82 | struct irq_work work; | |
83 | ||
e8dd92bf | 84 | __be32 buffer[6]; /* 96-bit data + 32-bit pad + 64-bit timestamp */ |
27dec00e MR |
85 | }; |
86 | ||
87 | static const struct regmap_range atlas_volatile_ranges[] = { | |
88 | regmap_reg_range(ATLAS_REG_INT_CONTROL, ATLAS_REG_INT_CONTROL), | |
27dec00e | 89 | regmap_reg_range(ATLAS_REG_PH_DATA, ATLAS_REG_PH_DATA + 4), |
e8dd92bf | 90 | regmap_reg_range(ATLAS_REG_EC_DATA, ATLAS_REG_PSS_DATA + 4), |
27dec00e MR |
91 | }; |
92 | ||
93 | static const struct regmap_access_table atlas_volatile_table = { | |
94 | .yes_ranges = atlas_volatile_ranges, | |
95 | .n_yes_ranges = ARRAY_SIZE(atlas_volatile_ranges), | |
96 | }; | |
97 | ||
98 | static const struct regmap_config atlas_regmap_config = { | |
99 | .name = ATLAS_REGMAP_NAME, | |
100 | ||
101 | .reg_bits = 8, | |
102 | .val_bits = 8, | |
103 | ||
104 | .volatile_table = &atlas_volatile_table, | |
e8dd92bf | 105 | .max_register = ATLAS_REG_PSS_DATA + 4, |
0d43b346 | 106 | .cache_type = REGCACHE_RBTREE, |
27dec00e MR |
107 | }; |
108 | ||
7103b99b | 109 | static const struct iio_chan_spec atlas_ph_channels[] = { |
27dec00e MR |
110 | { |
111 | .type = IIO_PH, | |
7103b99b | 112 | .address = ATLAS_REG_PH_DATA, |
27dec00e MR |
113 | .info_mask_separate = |
114 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), | |
115 | .scan_index = 0, | |
116 | .scan_type = { | |
117 | .sign = 'u', | |
118 | .realbits = 32, | |
119 | .storagebits = 32, | |
120 | .endianness = IIO_BE, | |
121 | }, | |
122 | }, | |
123 | IIO_CHAN_SOFT_TIMESTAMP(1), | |
124 | { | |
125 | .type = IIO_TEMP, | |
7103b99b | 126 | .address = ATLAS_REG_PH_TEMP_DATA, |
27dec00e MR |
127 | .info_mask_separate = |
128 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), | |
129 | .output = 1, | |
130 | .scan_index = -1 | |
131 | }, | |
132 | }; | |
133 | ||
e8dd92bf MR |
134 | #define ATLAS_EC_CHANNEL(_idx, _addr) \ |
135 | {\ | |
136 | .type = IIO_CONCENTRATION, \ | |
137 | .indexed = 1, \ | |
138 | .channel = _idx, \ | |
139 | .address = _addr, \ | |
140 | .info_mask_separate = \ | |
141 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), \ | |
142 | .scan_index = _idx + 1, \ | |
143 | .scan_type = { \ | |
144 | .sign = 'u', \ | |
145 | .realbits = 32, \ | |
146 | .storagebits = 32, \ | |
147 | .endianness = IIO_BE, \ | |
148 | }, \ | |
149 | } | |
150 | ||
151 | static const struct iio_chan_spec atlas_ec_channels[] = { | |
152 | { | |
153 | .type = IIO_ELECTRICALCONDUCTIVITY, | |
154 | .address = ATLAS_REG_EC_DATA, | |
155 | .info_mask_separate = | |
156 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), | |
157 | .scan_index = 0, | |
158 | .scan_type = { | |
159 | .sign = 'u', | |
160 | .realbits = 32, | |
161 | .storagebits = 32, | |
162 | .endianness = IIO_BE, | |
163 | }, | |
164 | }, | |
165 | ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA), | |
166 | ATLAS_EC_CHANNEL(1, ATLAS_REG_PSS_DATA), | |
167 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
168 | { | |
169 | .type = IIO_TEMP, | |
170 | .address = ATLAS_REG_EC_TEMP_DATA, | |
171 | .info_mask_separate = | |
172 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), | |
173 | .output = 1, | |
174 | .scan_index = -1 | |
175 | }, | |
176 | }; | |
177 | ||
7103b99b MR |
178 | static int atlas_check_ph_calibration(struct atlas_data *data) |
179 | { | |
180 | struct device *dev = &data->client->dev; | |
181 | int ret; | |
182 | unsigned int val; | |
183 | ||
184 | ret = regmap_read(data->regmap, ATLAS_REG_PH_CALIB_STATUS, &val); | |
185 | if (ret) | |
186 | return ret; | |
187 | ||
188 | if (!(val & ATLAS_REG_PH_CALIB_STATUS_MASK)) { | |
189 | dev_warn(dev, "device has not been calibrated\n"); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | if (!(val & ATLAS_REG_PH_CALIB_STATUS_LOW)) | |
194 | dev_warn(dev, "device missing low point calibration\n"); | |
195 | ||
196 | if (!(val & ATLAS_REG_PH_CALIB_STATUS_MID)) | |
197 | dev_warn(dev, "device missing mid point calibration\n"); | |
198 | ||
199 | if (!(val & ATLAS_REG_PH_CALIB_STATUS_HIGH)) | |
200 | dev_warn(dev, "device missing high point calibration\n"); | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
e8dd92bf MR |
205 | static int atlas_check_ec_calibration(struct atlas_data *data) |
206 | { | |
207 | struct device *dev = &data->client->dev; | |
208 | int ret; | |
209 | unsigned int val; | |
210 | ||
211 | ret = regmap_bulk_read(data->regmap, ATLAS_REG_EC_PROBE, &val, 2); | |
212 | if (ret) | |
213 | return ret; | |
214 | ||
215 | dev_info(dev, "probe set to K = %d.%.2d", be16_to_cpu(val) / 100, | |
216 | be16_to_cpu(val) % 100); | |
217 | ||
218 | ret = regmap_read(data->regmap, ATLAS_REG_EC_CALIB_STATUS, &val); | |
219 | if (ret) | |
220 | return ret; | |
221 | ||
222 | if (!(val & ATLAS_REG_EC_CALIB_STATUS_MASK)) { | |
223 | dev_warn(dev, "device has not been calibrated\n"); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | if (!(val & ATLAS_REG_EC_CALIB_STATUS_DRY)) | |
228 | dev_warn(dev, "device missing dry point calibration\n"); | |
229 | ||
230 | if (val & ATLAS_REG_EC_CALIB_STATUS_SINGLE) { | |
231 | dev_warn(dev, "device using single point calibration\n"); | |
232 | } else { | |
233 | if (!(val & ATLAS_REG_EC_CALIB_STATUS_LOW)) | |
234 | dev_warn(dev, "device missing low point calibration\n"); | |
235 | ||
236 | if (!(val & ATLAS_REG_EC_CALIB_STATUS_HIGH)) | |
237 | dev_warn(dev, "device missing high point calibration\n"); | |
238 | } | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
7103b99b MR |
243 | struct atlas_device { |
244 | const struct iio_chan_spec *channels; | |
245 | int num_channels; | |
246 | int data_reg; | |
247 | ||
248 | int (*calibration)(struct atlas_data *data); | |
249 | int delay; | |
250 | }; | |
251 | ||
252 | static struct atlas_device atlas_devices[] = { | |
253 | [ATLAS_PH_SM] = { | |
254 | .channels = atlas_ph_channels, | |
255 | .num_channels = 3, | |
256 | .data_reg = ATLAS_REG_PH_DATA, | |
257 | .calibration = &atlas_check_ph_calibration, | |
258 | .delay = ATLAS_PH_INT_TIME_IN_US, | |
259 | }, | |
e8dd92bf MR |
260 | [ATLAS_EC_SM] = { |
261 | .channels = atlas_ec_channels, | |
262 | .num_channels = 5, | |
263 | .data_reg = ATLAS_REG_EC_DATA, | |
264 | .calibration = &atlas_check_ec_calibration, | |
265 | .delay = ATLAS_EC_INT_TIME_IN_US, | |
266 | }, | |
267 | ||
7103b99b MR |
268 | }; |
269 | ||
27dec00e MR |
270 | static int atlas_set_powermode(struct atlas_data *data, int on) |
271 | { | |
272 | return regmap_write(data->regmap, ATLAS_REG_PWR_CONTROL, on); | |
273 | } | |
274 | ||
275 | static int atlas_set_interrupt(struct atlas_data *data, bool state) | |
276 | { | |
277 | return regmap_update_bits(data->regmap, ATLAS_REG_INT_CONTROL, | |
278 | ATLAS_REG_INT_CONTROL_EN, | |
279 | state ? ATLAS_REG_INT_CONTROL_EN : 0); | |
280 | } | |
281 | ||
282 | static int atlas_buffer_postenable(struct iio_dev *indio_dev) | |
283 | { | |
284 | struct atlas_data *data = iio_priv(indio_dev); | |
285 | int ret; | |
286 | ||
287 | ret = iio_triggered_buffer_postenable(indio_dev); | |
288 | if (ret) | |
289 | return ret; | |
290 | ||
291 | ret = pm_runtime_get_sync(&data->client->dev); | |
292 | if (ret < 0) { | |
293 | pm_runtime_put_noidle(&data->client->dev); | |
294 | return ret; | |
295 | } | |
296 | ||
297 | return atlas_set_interrupt(data, true); | |
298 | } | |
299 | ||
300 | static int atlas_buffer_predisable(struct iio_dev *indio_dev) | |
301 | { | |
302 | struct atlas_data *data = iio_priv(indio_dev); | |
303 | int ret; | |
304 | ||
305 | ret = iio_triggered_buffer_predisable(indio_dev); | |
306 | if (ret) | |
307 | return ret; | |
308 | ||
309 | ret = atlas_set_interrupt(data, false); | |
310 | if (ret) | |
311 | return ret; | |
312 | ||
313 | pm_runtime_mark_last_busy(&data->client->dev); | |
314 | return pm_runtime_put_autosuspend(&data->client->dev); | |
315 | } | |
316 | ||
317 | static const struct iio_trigger_ops atlas_interrupt_trigger_ops = { | |
318 | .owner = THIS_MODULE, | |
319 | }; | |
320 | ||
321 | static const struct iio_buffer_setup_ops atlas_buffer_setup_ops = { | |
322 | .postenable = atlas_buffer_postenable, | |
323 | .predisable = atlas_buffer_predisable, | |
324 | }; | |
325 | ||
326 | static void atlas_work_handler(struct irq_work *work) | |
327 | { | |
328 | struct atlas_data *data = container_of(work, struct atlas_data, work); | |
329 | ||
330 | iio_trigger_poll(data->trig); | |
331 | } | |
332 | ||
333 | static irqreturn_t atlas_trigger_handler(int irq, void *private) | |
334 | { | |
335 | struct iio_poll_func *pf = private; | |
336 | struct iio_dev *indio_dev = pf->indio_dev; | |
337 | struct atlas_data *data = iio_priv(indio_dev); | |
338 | int ret; | |
339 | ||
7103b99b MR |
340 | ret = regmap_bulk_read(data->regmap, data->chip->data_reg, |
341 | (u8 *) &data->buffer, | |
342 | sizeof(__be32) * (data->chip->num_channels - 2)); | |
27dec00e | 343 | |
98e55e93 | 344 | if (!ret) |
27dec00e | 345 | iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, |
bc2b7dab | 346 | iio_get_time_ns(indio_dev)); |
27dec00e MR |
347 | |
348 | iio_trigger_notify_done(indio_dev->trig); | |
349 | ||
350 | return IRQ_HANDLED; | |
351 | } | |
352 | ||
353 | static irqreturn_t atlas_interrupt_handler(int irq, void *private) | |
354 | { | |
355 | struct iio_dev *indio_dev = private; | |
356 | struct atlas_data *data = iio_priv(indio_dev); | |
357 | ||
358 | irq_work_queue(&data->work); | |
359 | ||
360 | return IRQ_HANDLED; | |
361 | } | |
362 | ||
7103b99b | 363 | static int atlas_read_measurement(struct atlas_data *data, int reg, __be32 *val) |
27dec00e MR |
364 | { |
365 | struct device *dev = &data->client->dev; | |
366 | int suspended = pm_runtime_suspended(dev); | |
367 | int ret; | |
368 | ||
369 | ret = pm_runtime_get_sync(dev); | |
370 | if (ret < 0) { | |
371 | pm_runtime_put_noidle(dev); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | if (suspended) | |
7103b99b | 376 | usleep_range(data->chip->delay, data->chip->delay + 100000); |
27dec00e | 377 | |
7103b99b | 378 | ret = regmap_bulk_read(data->regmap, reg, (u8 *) val, sizeof(*val)); |
27dec00e MR |
379 | |
380 | pm_runtime_mark_last_busy(dev); | |
381 | pm_runtime_put_autosuspend(dev); | |
382 | ||
383 | return ret; | |
384 | } | |
385 | ||
386 | static int atlas_read_raw(struct iio_dev *indio_dev, | |
387 | struct iio_chan_spec const *chan, | |
388 | int *val, int *val2, long mask) | |
389 | { | |
390 | struct atlas_data *data = iio_priv(indio_dev); | |
391 | ||
392 | switch (mask) { | |
393 | case IIO_CHAN_INFO_RAW: { | |
394 | int ret; | |
395 | __be32 reg; | |
396 | ||
397 | switch (chan->type) { | |
398 | case IIO_TEMP: | |
399 | ret = regmap_bulk_read(data->regmap, chan->address, | |
400 | (u8 *) ®, sizeof(reg)); | |
401 | break; | |
402 | case IIO_PH: | |
e8dd92bf MR |
403 | case IIO_CONCENTRATION: |
404 | case IIO_ELECTRICALCONDUCTIVITY: | |
27dec00e MR |
405 | mutex_lock(&indio_dev->mlock); |
406 | ||
407 | if (iio_buffer_enabled(indio_dev)) | |
408 | ret = -EBUSY; | |
409 | else | |
7103b99b MR |
410 | ret = atlas_read_measurement(data, |
411 | chan->address, ®); | |
27dec00e MR |
412 | |
413 | mutex_unlock(&indio_dev->mlock); | |
414 | break; | |
415 | default: | |
416 | ret = -EINVAL; | |
417 | } | |
418 | ||
419 | if (!ret) { | |
420 | *val = be32_to_cpu(reg); | |
421 | ret = IIO_VAL_INT; | |
422 | } | |
423 | return ret; | |
424 | } | |
425 | case IIO_CHAN_INFO_SCALE: | |
426 | switch (chan->type) { | |
427 | case IIO_TEMP: | |
428 | *val = 1; /* 0.01 */ | |
429 | *val2 = 100; | |
430 | break; | |
431 | case IIO_PH: | |
432 | *val = 1; /* 0.001 */ | |
433 | *val2 = 1000; | |
434 | break; | |
e8dd92bf MR |
435 | case IIO_ELECTRICALCONDUCTIVITY: |
436 | *val = 1; /* 0.00001 */ | |
ca64d4bc | 437 | *val2 = 100000; |
e8dd92bf MR |
438 | break; |
439 | case IIO_CONCENTRATION: | |
440 | *val = 0; /* 0.000000001 */ | |
441 | *val2 = 1000; | |
442 | return IIO_VAL_INT_PLUS_NANO; | |
27dec00e MR |
443 | default: |
444 | return -EINVAL; | |
445 | } | |
446 | return IIO_VAL_FRACTIONAL; | |
447 | } | |
448 | ||
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | static int atlas_write_raw(struct iio_dev *indio_dev, | |
453 | struct iio_chan_spec const *chan, | |
454 | int val, int val2, long mask) | |
455 | { | |
456 | struct atlas_data *data = iio_priv(indio_dev); | |
457 | __be32 reg = cpu_to_be32(val); | |
458 | ||
459 | if (val2 != 0 || val < 0 || val > 20000) | |
460 | return -EINVAL; | |
461 | ||
462 | if (mask != IIO_CHAN_INFO_RAW || chan->type != IIO_TEMP) | |
463 | return -EINVAL; | |
464 | ||
465 | return regmap_bulk_write(data->regmap, chan->address, | |
466 | ®, sizeof(reg)); | |
467 | } | |
468 | ||
469 | static const struct iio_info atlas_info = { | |
470 | .driver_module = THIS_MODULE, | |
471 | .read_raw = atlas_read_raw, | |
472 | .write_raw = atlas_write_raw, | |
473 | }; | |
474 | ||
7103b99b MR |
475 | static const struct i2c_device_id atlas_id[] = { |
476 | { "atlas-ph-sm", ATLAS_PH_SM}, | |
e8dd92bf | 477 | { "atlas-ec-sm", ATLAS_EC_SM}, |
7103b99b MR |
478 | {} |
479 | }; | |
480 | MODULE_DEVICE_TABLE(i2c, atlas_id); | |
27dec00e | 481 | |
7103b99b MR |
482 | static const struct of_device_id atlas_dt_ids[] = { |
483 | { .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, }, | |
e8dd92bf | 484 | { .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, }, |
7103b99b | 485 | { } |
27dec00e | 486 | }; |
7103b99b | 487 | MODULE_DEVICE_TABLE(of, atlas_dt_ids); |
27dec00e MR |
488 | |
489 | static int atlas_probe(struct i2c_client *client, | |
490 | const struct i2c_device_id *id) | |
491 | { | |
492 | struct atlas_data *data; | |
7103b99b MR |
493 | struct atlas_device *chip; |
494 | const struct of_device_id *of_id; | |
27dec00e MR |
495 | struct iio_trigger *trig; |
496 | struct iio_dev *indio_dev; | |
497 | int ret; | |
498 | ||
499 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
500 | if (!indio_dev) | |
501 | return -ENOMEM; | |
502 | ||
7103b99b MR |
503 | of_id = of_match_device(atlas_dt_ids, &client->dev); |
504 | if (!of_id) | |
505 | chip = &atlas_devices[id->driver_data]; | |
506 | else | |
507 | chip = &atlas_devices[(unsigned long)of_id->data]; | |
508 | ||
27dec00e MR |
509 | indio_dev->info = &atlas_info; |
510 | indio_dev->name = ATLAS_DRV_NAME; | |
7103b99b MR |
511 | indio_dev->channels = chip->channels; |
512 | indio_dev->num_channels = chip->num_channels; | |
27dec00e MR |
513 | indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE; |
514 | indio_dev->dev.parent = &client->dev; | |
515 | ||
516 | trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", | |
517 | indio_dev->name, indio_dev->id); | |
518 | ||
519 | if (!trig) | |
520 | return -ENOMEM; | |
521 | ||
522 | data = iio_priv(indio_dev); | |
523 | data->client = client; | |
524 | data->trig = trig; | |
7103b99b | 525 | data->chip = chip; |
27dec00e MR |
526 | trig->dev.parent = indio_dev->dev.parent; |
527 | trig->ops = &atlas_interrupt_trigger_ops; | |
528 | iio_trigger_set_drvdata(trig, indio_dev); | |
529 | ||
530 | i2c_set_clientdata(client, indio_dev); | |
531 | ||
532 | data->regmap = devm_regmap_init_i2c(client, &atlas_regmap_config); | |
533 | if (IS_ERR(data->regmap)) { | |
534 | dev_err(&client->dev, "regmap initialization failed\n"); | |
535 | return PTR_ERR(data->regmap); | |
536 | } | |
537 | ||
538 | ret = pm_runtime_set_active(&client->dev); | |
539 | if (ret) | |
540 | return ret; | |
541 | ||
542 | if (client->irq <= 0) { | |
543 | dev_err(&client->dev, "no valid irq defined\n"); | |
544 | return -EINVAL; | |
545 | } | |
546 | ||
7103b99b | 547 | ret = chip->calibration(data); |
27dec00e MR |
548 | if (ret) |
549 | return ret; | |
550 | ||
551 | ret = iio_trigger_register(trig); | |
552 | if (ret) { | |
553 | dev_err(&client->dev, "failed to register trigger\n"); | |
554 | return ret; | |
555 | } | |
556 | ||
557 | ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, | |
558 | &atlas_trigger_handler, &atlas_buffer_setup_ops); | |
559 | if (ret) { | |
560 | dev_err(&client->dev, "cannot setup iio trigger\n"); | |
561 | goto unregister_trigger; | |
562 | } | |
563 | ||
564 | init_irq_work(&data->work, atlas_work_handler); | |
565 | ||
566 | /* interrupt pin toggles on new conversion */ | |
567 | ret = devm_request_threaded_irq(&client->dev, client->irq, | |
568 | NULL, atlas_interrupt_handler, | |
569 | IRQF_TRIGGER_RISING | | |
570 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, | |
571 | "atlas_irq", | |
572 | indio_dev); | |
573 | if (ret) { | |
574 | dev_err(&client->dev, "request irq (%d) failed\n", client->irq); | |
575 | goto unregister_buffer; | |
576 | } | |
577 | ||
578 | ret = atlas_set_powermode(data, 1); | |
579 | if (ret) { | |
580 | dev_err(&client->dev, "cannot power device on"); | |
581 | goto unregister_buffer; | |
582 | } | |
583 | ||
584 | pm_runtime_enable(&client->dev); | |
585 | pm_runtime_set_autosuspend_delay(&client->dev, 2500); | |
586 | pm_runtime_use_autosuspend(&client->dev); | |
587 | ||
588 | ret = iio_device_register(indio_dev); | |
589 | if (ret) { | |
590 | dev_err(&client->dev, "unable to register device\n"); | |
591 | goto unregister_pm; | |
592 | } | |
593 | ||
594 | return 0; | |
595 | ||
596 | unregister_pm: | |
597 | pm_runtime_disable(&client->dev); | |
598 | atlas_set_powermode(data, 0); | |
599 | ||
600 | unregister_buffer: | |
601 | iio_triggered_buffer_cleanup(indio_dev); | |
602 | ||
603 | unregister_trigger: | |
604 | iio_trigger_unregister(data->trig); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | ||
609 | static int atlas_remove(struct i2c_client *client) | |
610 | { | |
611 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
612 | struct atlas_data *data = iio_priv(indio_dev); | |
613 | ||
614 | iio_device_unregister(indio_dev); | |
615 | iio_triggered_buffer_cleanup(indio_dev); | |
616 | iio_trigger_unregister(data->trig); | |
617 | ||
618 | pm_runtime_disable(&client->dev); | |
619 | pm_runtime_set_suspended(&client->dev); | |
620 | pm_runtime_put_noidle(&client->dev); | |
621 | ||
622 | return atlas_set_powermode(data, 0); | |
623 | } | |
624 | ||
625 | #ifdef CONFIG_PM | |
626 | static int atlas_runtime_suspend(struct device *dev) | |
627 | { | |
628 | struct atlas_data *data = | |
629 | iio_priv(i2c_get_clientdata(to_i2c_client(dev))); | |
630 | ||
631 | return atlas_set_powermode(data, 0); | |
632 | } | |
633 | ||
634 | static int atlas_runtime_resume(struct device *dev) | |
635 | { | |
636 | struct atlas_data *data = | |
637 | iio_priv(i2c_get_clientdata(to_i2c_client(dev))); | |
638 | ||
639 | return atlas_set_powermode(data, 1); | |
640 | } | |
641 | #endif | |
642 | ||
643 | static const struct dev_pm_ops atlas_pm_ops = { | |
644 | SET_RUNTIME_PM_OPS(atlas_runtime_suspend, | |
645 | atlas_runtime_resume, NULL) | |
646 | }; | |
647 | ||
27dec00e MR |
648 | static struct i2c_driver atlas_driver = { |
649 | .driver = { | |
650 | .name = ATLAS_DRV_NAME, | |
651 | .of_match_table = of_match_ptr(atlas_dt_ids), | |
652 | .pm = &atlas_pm_ops, | |
653 | }, | |
654 | .probe = atlas_probe, | |
655 | .remove = atlas_remove, | |
656 | .id_table = atlas_id, | |
657 | }; | |
658 | module_i2c_driver(atlas_driver); | |
659 | ||
660 | MODULE_AUTHOR("Matt Ranostay <mranostay@gmail.com>"); | |
661 | MODULE_DESCRIPTION("Atlas Scientific pH-SM sensor"); | |
662 | MODULE_LICENSE("GPL"); |