1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2021 Analog Devices, Inc.
4 * Author: Cosmin Tanislav <cosmin.tanislav@analog.com>
5 */
6
7 #include <linux/bitfield.h>
8 #include <linux/bitops.h>
9 #include <linux/iio/buffer.h>
10 #include <linux/iio/events.h>
11 #include <linux/iio/iio.h>
12 #include <linux/iio/kfifo_buf.h>
13 #include <linux/iio/sysfs.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
16 #include <linux/mod_devicetable.h>
17 #include <linux/regmap.h>
18 #include <linux/regulator/consumer.h>
19 #include <linux/unaligned.h>
20
21 #include "adxl367.h"
22
23 #define ADXL367_REG_DEVID 0x00
24 #define ADXL367_DEVID_AD 0xAD
25
26 #define ADXL367_REG_STATUS 0x0B
27 #define ADXL367_STATUS_INACT_MASK BIT(5)
28 #define ADXL367_STATUS_ACT_MASK BIT(4)
29 #define ADXL367_STATUS_FIFO_FULL_MASK BIT(2)
30
31 #define ADXL367_FIFO_ENT_H_MASK GENMASK(1, 0)
32
33 #define ADXL367_REG_X_DATA_H 0x0E
34 #define ADXL367_REG_Y_DATA_H 0x10
35 #define ADXL367_REG_Z_DATA_H 0x12
36 #define ADXL367_REG_TEMP_DATA_H 0x14
37 #define ADXL367_REG_EX_ADC_DATA_H 0x16
38 #define ADXL367_DATA_MASK GENMASK(15, 2)
39
40 #define ADXL367_TEMP_25C 165
41 #define ADXL367_TEMP_PER_C 54
42
43 #define ADXL367_VOLTAGE_OFFSET 8192
44 #define ADXL367_VOLTAGE_MAX_MV 1000
45 #define ADXL367_VOLTAGE_MAX_RAW GENMASK(13, 0)
46
47 #define ADXL367_REG_RESET 0x1F
48 #define ADXL367_RESET_CODE 0x52
49
50 #define ADXL367_REG_THRESH_ACT_H 0x20
51 #define ADXL367_REG_THRESH_INACT_H 0x23
52 #define ADXL367_THRESH_MAX GENMASK(12, 0)
53 #define ADXL367_THRESH_VAL_H_MASK GENMASK(12, 6)
54 #define ADXL367_THRESH_H_MASK GENMASK(6, 0)
55 #define ADXL367_THRESH_VAL_L_MASK GENMASK(5, 0)
56 #define ADXL367_THRESH_L_MASK GENMASK(7, 2)
57
58 #define ADXL367_REG_TIME_ACT 0x22
59 #define ADXL367_REG_TIME_INACT_H 0x25
60 #define ADXL367_TIME_ACT_MAX GENMASK(7, 0)
61 #define ADXL367_TIME_INACT_MAX GENMASK(15, 0)
62 #define ADXL367_TIME_INACT_VAL_H_MASK GENMASK(15, 8)
63 #define ADXL367_TIME_INACT_H_MASK GENMASK(7, 0)
64 #define ADXL367_TIME_INACT_VAL_L_MASK GENMASK(7, 0)
65 #define ADXL367_TIME_INACT_L_MASK GENMASK(7, 0)
66
67 #define ADXL367_REG_ACT_INACT_CTL 0x27
68 #define ADXL367_ACT_EN_MASK GENMASK(1, 0)
69 #define ADXL367_ACT_LINKLOOP_MASK GENMASK(5, 4)
70
71 #define ADXL367_REG_FIFO_CTL 0x28
72 #define ADXL367_FIFO_CTL_FORMAT_MASK GENMASK(6, 3)
73 #define ADXL367_FIFO_CTL_MODE_MASK GENMASK(1, 0)
74
75 #define ADXL367_REG_FIFO_SAMPLES 0x29
76 #define ADXL367_FIFO_SIZE 512
77 #define ADXL367_FIFO_MAX_WATERMARK 511
78
79 #define ADXL367_SAMPLES_VAL_H_MASK BIT(8)
80 #define ADXL367_SAMPLES_H_MASK BIT(2)
81 #define ADXL367_SAMPLES_VAL_L_MASK GENMASK(7, 0)
82 #define ADXL367_SAMPLES_L_MASK GENMASK(7, 0)
83
84 #define ADXL367_REG_INT1_MAP 0x2A
85 #define ADXL367_INT_INACT_MASK BIT(5)
86 #define ADXL367_INT_ACT_MASK BIT(4)
87 #define ADXL367_INT_FIFO_WATERMARK_MASK BIT(2)
88
89 #define ADXL367_REG_FILTER_CTL 0x2C
90 #define ADXL367_FILTER_CTL_RANGE_MASK GENMASK(7, 6)
91 #define ADXL367_2G_RANGE_1G 4095
92 #define ADXL367_2G_RANGE_100MG 409
93 #define ADXL367_FILTER_CTL_ODR_MASK GENMASK(2, 0)
94
95 #define ADXL367_REG_POWER_CTL 0x2D
96 #define ADXL367_POWER_CTL_MODE_MASK GENMASK(1, 0)
97
98 #define ADXL367_REG_ADC_CTL 0x3C
99 #define ADXL367_REG_TEMP_CTL 0x3D
100 #define ADXL367_ADC_EN_MASK BIT(0)
101
102 enum adxl367_range {
103 ADXL367_2G_RANGE,
104 ADXL367_4G_RANGE,
105 ADXL367_8G_RANGE,
106 };
107
108 enum adxl367_fifo_mode {
109 ADXL367_FIFO_MODE_DISABLED = 0b00,
110 ADXL367_FIFO_MODE_STREAM = 0b10,
111 };
112
113 enum adxl367_fifo_format {
114 ADXL367_FIFO_FORMAT_XYZ,
115 ADXL367_FIFO_FORMAT_X,
116 ADXL367_FIFO_FORMAT_Y,
117 ADXL367_FIFO_FORMAT_Z,
118 ADXL367_FIFO_FORMAT_XYZT,
119 ADXL367_FIFO_FORMAT_XT,
120 ADXL367_FIFO_FORMAT_YT,
121 ADXL367_FIFO_FORMAT_ZT,
122 ADXL367_FIFO_FORMAT_XYZA,
123 ADXL367_FIFO_FORMAT_XA,
124 ADXL367_FIFO_FORMAT_YA,
125 ADXL367_FIFO_FORMAT_ZA,
126 };
127
128 enum adxl367_op_mode {
129 ADXL367_OP_STANDBY = 0b00,
130 ADXL367_OP_MEASURE = 0b10,
131 };
132
133 enum adxl367_act_proc_mode {
134 ADXL367_LOOPED = 0b11,
135 };
136
137 enum adxl367_act_en_mode {
138 ADXL367_ACT_DISABLED = 0b00,
139 ADCL367_ACT_REF_ENABLED = 0b11,
140 };
141
142 enum adxl367_activity_type {
143 ADXL367_ACTIVITY,
144 ADXL367_INACTIVITY,
145 };
146
147 enum adxl367_odr {
148 ADXL367_ODR_12P5HZ,
149 ADXL367_ODR_25HZ,
150 ADXL367_ODR_50HZ,
151 ADXL367_ODR_100HZ,
152 ADXL367_ODR_200HZ,
153 ADXL367_ODR_400HZ,
154 };
155
156 struct adxl367_state {
157 const struct adxl367_ops *ops;
158 void *context;
159
160 struct device *dev;
161 struct regmap *regmap;
162
163 /*
164 * Synchronize access to members of driver state, and ensure atomicity
165 * of consecutive regmap operations.
166 */
167 struct mutex lock;
168
169 enum adxl367_odr odr;
170 enum adxl367_range range;
171
172 unsigned int act_threshold;
173 unsigned int act_time_ms;
174 unsigned int inact_threshold;
175 unsigned int inact_time_ms;
176
177 unsigned int fifo_set_size;
178 unsigned int fifo_watermark;
179
180 __be16 fifo_buf[ADXL367_FIFO_SIZE] __aligned(IIO_DMA_MINALIGN);
181 __be16 sample_buf;
182 u8 act_threshold_buf[2];
183 u8 inact_time_buf[2];
184 u8 status_buf[3];
185 };
186
187 static const unsigned int adxl367_threshold_h_reg_tbl[] = {
188 [ADXL367_ACTIVITY] = ADXL367_REG_THRESH_ACT_H,
189 [ADXL367_INACTIVITY] = ADXL367_REG_THRESH_INACT_H,
190 };
191
192 static const unsigned int adxl367_act_en_shift_tbl[] = {
193 [ADXL367_ACTIVITY] = 0,
194 [ADXL367_INACTIVITY] = 2,
195 };
196
197 static const unsigned int adxl367_act_int_mask_tbl[] = {
198 [ADXL367_ACTIVITY] = ADXL367_INT_ACT_MASK,
199 [ADXL367_INACTIVITY] = ADXL367_INT_INACT_MASK,
200 };
201
202 static const int adxl367_samp_freq_tbl[][2] = {
203 [ADXL367_ODR_12P5HZ] = {12, 500000},
204 [ADXL367_ODR_25HZ] = {25, 0},
205 [ADXL367_ODR_50HZ] = {50, 0},
206 [ADXL367_ODR_100HZ] = {100, 0},
207 [ADXL367_ODR_200HZ] = {200, 0},
208 [ADXL367_ODR_400HZ] = {400, 0},
209 };
210
211 /* (g * 2) * 9.80665 * 1000000 / (2^14 - 1) */
212 static const int adxl367_range_scale_tbl[][2] = {
213 [ADXL367_2G_RANGE] = {0, 2394347},
214 [ADXL367_4G_RANGE] = {0, 4788695},
215 [ADXL367_8G_RANGE] = {0, 9577391},
216 };
217
218 static const int adxl367_range_scale_factor_tbl[] = {
219 [ADXL367_2G_RANGE] = 1,
220 [ADXL367_4G_RANGE] = 2,
221 [ADXL367_8G_RANGE] = 4,
222 };
223
224 enum {
225 ADXL367_X_CHANNEL_INDEX,
226 ADXL367_Y_CHANNEL_INDEX,
227 ADXL367_Z_CHANNEL_INDEX,
228 ADXL367_TEMP_CHANNEL_INDEX,
229 ADXL367_EX_ADC_CHANNEL_INDEX
230 };
231
232 #define ADXL367_X_CHANNEL_MASK BIT(ADXL367_X_CHANNEL_INDEX)
233 #define ADXL367_Y_CHANNEL_MASK BIT(ADXL367_Y_CHANNEL_INDEX)
234 #define ADXL367_Z_CHANNEL_MASK BIT(ADXL367_Z_CHANNEL_INDEX)
235 #define ADXL367_TEMP_CHANNEL_MASK BIT(ADXL367_TEMP_CHANNEL_INDEX)
236 #define ADXL367_EX_ADC_CHANNEL_MASK BIT(ADXL367_EX_ADC_CHANNEL_INDEX)
237
238 static const enum adxl367_fifo_format adxl367_fifo_formats[] = {
239 ADXL367_FIFO_FORMAT_X,
240 ADXL367_FIFO_FORMAT_Y,
241 ADXL367_FIFO_FORMAT_Z,
242 ADXL367_FIFO_FORMAT_XT,
243 ADXL367_FIFO_FORMAT_YT,
244 ADXL367_FIFO_FORMAT_ZT,
245 ADXL367_FIFO_FORMAT_XA,
246 ADXL367_FIFO_FORMAT_YA,
247 ADXL367_FIFO_FORMAT_ZA,
248 ADXL367_FIFO_FORMAT_XYZ,
249 ADXL367_FIFO_FORMAT_XYZT,
250 ADXL367_FIFO_FORMAT_XYZA,
251 };
252
253 static const unsigned long adxl367_channel_masks[] = {
254 ADXL367_X_CHANNEL_MASK,
255 ADXL367_Y_CHANNEL_MASK,
256 ADXL367_Z_CHANNEL_MASK,
257 ADXL367_X_CHANNEL_MASK | ADXL367_TEMP_CHANNEL_MASK,
258 ADXL367_Y_CHANNEL_MASK | ADXL367_TEMP_CHANNEL_MASK,
259 ADXL367_Z_CHANNEL_MASK | ADXL367_TEMP_CHANNEL_MASK,
260 ADXL367_X_CHANNEL_MASK | ADXL367_EX_ADC_CHANNEL_MASK,
261 ADXL367_Y_CHANNEL_MASK | ADXL367_EX_ADC_CHANNEL_MASK,
262 ADXL367_Z_CHANNEL_MASK | ADXL367_EX_ADC_CHANNEL_MASK,
263 ADXL367_X_CHANNEL_MASK | ADXL367_Y_CHANNEL_MASK | ADXL367_Z_CHANNEL_MASK,
264 ADXL367_X_CHANNEL_MASK | ADXL367_Y_CHANNEL_MASK | ADXL367_Z_CHANNEL_MASK |
265 ADXL367_TEMP_CHANNEL_MASK,
266 ADXL367_X_CHANNEL_MASK | ADXL367_Y_CHANNEL_MASK | ADXL367_Z_CHANNEL_MASK |
267 ADXL367_EX_ADC_CHANNEL_MASK,
268 0,
269 };
270
adxl367_set_measure_en(struct adxl367_state * st,bool en)271 static int adxl367_set_measure_en(struct adxl367_state *st, bool en)
272 {
273 enum adxl367_op_mode op_mode = en ? ADXL367_OP_MEASURE
274 : ADXL367_OP_STANDBY;
275 int ret;
276
277 ret = regmap_update_bits(st->regmap, ADXL367_REG_POWER_CTL,
278 ADXL367_POWER_CTL_MODE_MASK,
279 FIELD_PREP(ADXL367_POWER_CTL_MODE_MASK,
280 op_mode));
281 if (ret)
282 return ret;
283
284 /*
285 * Wait for acceleration output to settle after entering
286 * measure mode.
287 */
288 if (en)
289 msleep(100);
290
291 return 0;
292 }
293
adxl367_scale_act_thresholds(struct adxl367_state * st,enum adxl367_range old_range,enum adxl367_range new_range)294 static void adxl367_scale_act_thresholds(struct adxl367_state *st,
295 enum adxl367_range old_range,
296 enum adxl367_range new_range)
297 {
298 st->act_threshold = st->act_threshold
299 * adxl367_range_scale_factor_tbl[old_range]
300 / adxl367_range_scale_factor_tbl[new_range];
301 st->inact_threshold = st->inact_threshold
302 * adxl367_range_scale_factor_tbl[old_range]
303 / adxl367_range_scale_factor_tbl[new_range];
304 }
305
_adxl367_set_act_threshold(struct adxl367_state * st,enum adxl367_activity_type act,unsigned int threshold)306 static int _adxl367_set_act_threshold(struct adxl367_state *st,
307 enum adxl367_activity_type act,
308 unsigned int threshold)
309 {
310 u8 reg = adxl367_threshold_h_reg_tbl[act];
311 int ret;
312
313 if (threshold > ADXL367_THRESH_MAX)
314 return -EINVAL;
315
316 st->act_threshold_buf[0] = FIELD_PREP(ADXL367_THRESH_H_MASK,
317 FIELD_GET(ADXL367_THRESH_VAL_H_MASK,
318 threshold));
319 st->act_threshold_buf[1] = FIELD_PREP(ADXL367_THRESH_L_MASK,
320 FIELD_GET(ADXL367_THRESH_VAL_L_MASK,
321 threshold));
322
323 ret = regmap_bulk_write(st->regmap, reg, st->act_threshold_buf,
324 sizeof(st->act_threshold_buf));
325 if (ret)
326 return ret;
327
328 if (act == ADXL367_ACTIVITY)
329 st->act_threshold = threshold;
330 else
331 st->inact_threshold = threshold;
332
333 return 0;
334 }
335
adxl367_set_act_threshold(struct adxl367_state * st,enum adxl367_activity_type act,unsigned int threshold)336 static int adxl367_set_act_threshold(struct adxl367_state *st,
337 enum adxl367_activity_type act,
338 unsigned int threshold)
339 {
340 int ret;
341
342 guard(mutex)(&st->lock);
343
344 ret = adxl367_set_measure_en(st, false);
345 if (ret)
346 return ret;
347
348 ret = _adxl367_set_act_threshold(st, act, threshold);
349 if (ret)
350 return ret;
351
352 return adxl367_set_measure_en(st, true);
353 }
354
adxl367_set_act_proc_mode(struct adxl367_state * st,enum adxl367_act_proc_mode mode)355 static int adxl367_set_act_proc_mode(struct adxl367_state *st,
356 enum adxl367_act_proc_mode mode)
357 {
358 return regmap_update_bits(st->regmap, ADXL367_REG_ACT_INACT_CTL,
359 ADXL367_ACT_LINKLOOP_MASK,
360 FIELD_PREP(ADXL367_ACT_LINKLOOP_MASK,
361 mode));
362 }
363
adxl367_set_act_interrupt_en(struct adxl367_state * st,enum adxl367_activity_type act,bool en)364 static int adxl367_set_act_interrupt_en(struct adxl367_state *st,
365 enum adxl367_activity_type act,
366 bool en)
367 {
368 unsigned int mask = adxl367_act_int_mask_tbl[act];
369
370 return regmap_update_bits(st->regmap, ADXL367_REG_INT1_MAP,
371 mask, en ? mask : 0);
372 }
373
adxl367_get_act_interrupt_en(struct adxl367_state * st,enum adxl367_activity_type act,bool * en)374 static int adxl367_get_act_interrupt_en(struct adxl367_state *st,
375 enum adxl367_activity_type act,
376 bool *en)
377 {
378 unsigned int mask = adxl367_act_int_mask_tbl[act];
379 unsigned int val;
380 int ret;
381
382 ret = regmap_read(st->regmap, ADXL367_REG_INT1_MAP, &val);
383 if (ret)
384 return ret;
385
386 *en = !!(val & mask);
387
388 return 0;
389 }
390
adxl367_set_act_en(struct adxl367_state * st,enum adxl367_activity_type act,enum adxl367_act_en_mode en)391 static int adxl367_set_act_en(struct adxl367_state *st,
392 enum adxl367_activity_type act,
393 enum adxl367_act_en_mode en)
394 {
395 unsigned int ctl_shift = adxl367_act_en_shift_tbl[act];
396
397 return regmap_update_bits(st->regmap, ADXL367_REG_ACT_INACT_CTL,
398 ADXL367_ACT_EN_MASK << ctl_shift,
399 en << ctl_shift);
400 }
401
adxl367_set_fifo_watermark_interrupt_en(struct adxl367_state * st,bool en)402 static int adxl367_set_fifo_watermark_interrupt_en(struct adxl367_state *st,
403 bool en)
404 {
405 return regmap_update_bits(st->regmap, ADXL367_REG_INT1_MAP,
406 ADXL367_INT_FIFO_WATERMARK_MASK,
407 en ? ADXL367_INT_FIFO_WATERMARK_MASK : 0);
408 }
409
adxl367_get_fifo_mode(struct adxl367_state * st,enum adxl367_fifo_mode * fifo_mode)410 static int adxl367_get_fifo_mode(struct adxl367_state *st,
411 enum adxl367_fifo_mode *fifo_mode)
412 {
413 unsigned int val;
414 int ret;
415
416 ret = regmap_read(st->regmap, ADXL367_REG_FIFO_CTL, &val);
417 if (ret)
418 return ret;
419
420 *fifo_mode = FIELD_GET(ADXL367_FIFO_CTL_MODE_MASK, val);
421
422 return 0;
423 }
424
adxl367_set_fifo_mode(struct adxl367_state * st,enum adxl367_fifo_mode fifo_mode)425 static int adxl367_set_fifo_mode(struct adxl367_state *st,
426 enum adxl367_fifo_mode fifo_mode)
427 {
428 return regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
429 ADXL367_FIFO_CTL_MODE_MASK,
430 FIELD_PREP(ADXL367_FIFO_CTL_MODE_MASK,
431 fifo_mode));
432 }
433
adxl367_set_fifo_format(struct adxl367_state * st,enum adxl367_fifo_format fifo_format)434 static int adxl367_set_fifo_format(struct adxl367_state *st,
435 enum adxl367_fifo_format fifo_format)
436 {
437 return regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
438 ADXL367_FIFO_CTL_FORMAT_MASK,
439 FIELD_PREP(ADXL367_FIFO_CTL_FORMAT_MASK,
440 fifo_format));
441 }
442
adxl367_set_fifo_watermark(struct adxl367_state * st,unsigned int fifo_watermark)443 static int adxl367_set_fifo_watermark(struct adxl367_state *st,
444 unsigned int fifo_watermark)
445 {
446 unsigned int fifo_samples = fifo_watermark * st->fifo_set_size;
447 unsigned int fifo_samples_h, fifo_samples_l;
448 int ret;
449
450 if (fifo_samples > ADXL367_FIFO_MAX_WATERMARK)
451 fifo_samples = ADXL367_FIFO_MAX_WATERMARK;
452
453 fifo_samples /= st->fifo_set_size;
454
455 fifo_samples_h = FIELD_PREP(ADXL367_SAMPLES_H_MASK,
456 FIELD_GET(ADXL367_SAMPLES_VAL_H_MASK,
457 fifo_samples));
458 fifo_samples_l = FIELD_PREP(ADXL367_SAMPLES_L_MASK,
459 FIELD_GET(ADXL367_SAMPLES_VAL_L_MASK,
460 fifo_samples));
461
462 ret = regmap_update_bits(st->regmap, ADXL367_REG_FIFO_CTL,
463 ADXL367_SAMPLES_H_MASK, fifo_samples_h);
464 if (ret)
465 return ret;
466
467 ret = regmap_update_bits(st->regmap, ADXL367_REG_FIFO_SAMPLES,
468 ADXL367_SAMPLES_L_MASK, fifo_samples_l);
469 if (ret)
470 return ret;
471
472 st->fifo_watermark = fifo_watermark;
473
474 return 0;
475 }
476
adxl367_set_range(struct iio_dev * indio_dev,enum adxl367_range range)477 static int adxl367_set_range(struct iio_dev *indio_dev,
478 enum adxl367_range range)
479 {
480 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
481 struct adxl367_state *st = iio_priv(indio_dev);
482 int ret;
483
484 guard(mutex)(&st->lock);
485
486 ret = adxl367_set_measure_en(st, false);
487 if (ret)
488 return ret;
489
490 ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL,
491 ADXL367_FILTER_CTL_RANGE_MASK,
492 FIELD_PREP(ADXL367_FILTER_CTL_RANGE_MASK,
493 range));
494 if (ret)
495 return ret;
496
497 adxl367_scale_act_thresholds(st, st->range, range);
498
499 /* Activity thresholds depend on range */
500 ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY,
501 st->act_threshold);
502 if (ret)
503 return ret;
504
505 ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY,
506 st->inact_threshold);
507 if (ret)
508 return ret;
509
510 ret = adxl367_set_measure_en(st, true);
511 if (ret)
512 return ret;
513
514 st->range = range;
515
516 return 0;
517 }
518 unreachable();
519 }
520
adxl367_time_ms_to_samples(struct adxl367_state * st,unsigned int ms)521 static int adxl367_time_ms_to_samples(struct adxl367_state *st, unsigned int ms)
522 {
523 int freq_hz = adxl367_samp_freq_tbl[st->odr][0];
524 int freq_microhz = adxl367_samp_freq_tbl[st->odr][1];
525 /* Scale to decihertz to prevent precision loss in 12.5Hz case. */
526 int freq_dhz = freq_hz * 10 + freq_microhz / 100000;
527
528 return DIV_ROUND_CLOSEST(ms * freq_dhz, 10000);
529 }
530
_adxl367_set_act_time_ms(struct adxl367_state * st,unsigned int ms)531 static int _adxl367_set_act_time_ms(struct adxl367_state *st, unsigned int ms)
532 {
533 unsigned int val = adxl367_time_ms_to_samples(st, ms);
534 int ret;
535
536 if (val > ADXL367_TIME_ACT_MAX)
537 val = ADXL367_TIME_ACT_MAX;
538
539 ret = regmap_write(st->regmap, ADXL367_REG_TIME_ACT, val);
540 if (ret)
541 return ret;
542
543 st->act_time_ms = ms;
544
545 return 0;
546 }
547
_adxl367_set_inact_time_ms(struct adxl367_state * st,unsigned int ms)548 static int _adxl367_set_inact_time_ms(struct adxl367_state *st, unsigned int ms)
549 {
550 unsigned int val = adxl367_time_ms_to_samples(st, ms);
551 int ret;
552
553 if (val > ADXL367_TIME_INACT_MAX)
554 val = ADXL367_TIME_INACT_MAX;
555
556 st->inact_time_buf[0] = FIELD_PREP(ADXL367_TIME_INACT_H_MASK,
557 FIELD_GET(ADXL367_TIME_INACT_VAL_H_MASK,
558 val));
559 st->inact_time_buf[1] = FIELD_PREP(ADXL367_TIME_INACT_L_MASK,
560 FIELD_GET(ADXL367_TIME_INACT_VAL_L_MASK,
561 val));
562
563 ret = regmap_bulk_write(st->regmap, ADXL367_REG_TIME_INACT_H,
564 st->inact_time_buf, sizeof(st->inact_time_buf));
565 if (ret)
566 return ret;
567
568 st->inact_time_ms = ms;
569
570 return 0;
571 }
572
adxl367_set_act_time_ms(struct adxl367_state * st,enum adxl367_activity_type act,unsigned int ms)573 static int adxl367_set_act_time_ms(struct adxl367_state *st,
574 enum adxl367_activity_type act,
575 unsigned int ms)
576 {
577 int ret;
578
579 guard(mutex)(&st->lock);
580
581 ret = adxl367_set_measure_en(st, false);
582 if (ret)
583 return ret;
584
585 if (act == ADXL367_ACTIVITY)
586 ret = _adxl367_set_act_time_ms(st, ms);
587 else
588 ret = _adxl367_set_inact_time_ms(st, ms);
589
590 if (ret)
591 return ret;
592
593 return adxl367_set_measure_en(st, true);
594 }
595
_adxl367_set_odr(struct adxl367_state * st,enum adxl367_odr odr)596 static int _adxl367_set_odr(struct adxl367_state *st, enum adxl367_odr odr)
597 {
598 int ret;
599
600 ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL,
601 ADXL367_FILTER_CTL_ODR_MASK,
602 FIELD_PREP(ADXL367_FILTER_CTL_ODR_MASK,
603 odr));
604 if (ret)
605 return ret;
606
607 /* Activity timers depend on ODR */
608 ret = _adxl367_set_act_time_ms(st, st->act_time_ms);
609 if (ret)
610 return ret;
611
612 ret = _adxl367_set_inact_time_ms(st, st->inact_time_ms);
613 if (ret)
614 return ret;
615
616 st->odr = odr;
617
618 return 0;
619 }
620
adxl367_set_odr(struct iio_dev * indio_dev,enum adxl367_odr odr)621 static int adxl367_set_odr(struct iio_dev *indio_dev, enum adxl367_odr odr)
622 {
623 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
624 struct adxl367_state *st = iio_priv(indio_dev);
625 int ret;
626
627 guard(mutex)(&st->lock);
628
629 ret = adxl367_set_measure_en(st, false);
630 if (ret)
631 return ret;
632
633 ret = _adxl367_set_odr(st, odr);
634 if (ret)
635 return ret;
636
637 return adxl367_set_measure_en(st, true);
638 }
639 unreachable();
640 }
641
adxl367_set_temp_adc_en(struct adxl367_state * st,unsigned int reg,bool en)642 static int adxl367_set_temp_adc_en(struct adxl367_state *st, unsigned int reg,
643 bool en)
644 {
645 return regmap_update_bits(st->regmap, reg, ADXL367_ADC_EN_MASK,
646 en ? ADXL367_ADC_EN_MASK : 0);
647 }
648
adxl367_set_temp_adc_reg_en(struct adxl367_state * st,unsigned int reg,bool en)649 static int adxl367_set_temp_adc_reg_en(struct adxl367_state *st,
650 unsigned int reg, bool en)
651 {
652 int ret;
653
654 switch (reg) {
655 case ADXL367_REG_TEMP_DATA_H:
656 ret = adxl367_set_temp_adc_en(st, ADXL367_REG_TEMP_CTL, en);
657 break;
658 case ADXL367_REG_EX_ADC_DATA_H:
659 ret = adxl367_set_temp_adc_en(st, ADXL367_REG_ADC_CTL, en);
660 break;
661 default:
662 return 0;
663 }
664
665 if (ret)
666 return ret;
667
668 if (en)
669 msleep(100);
670
671 return 0;
672 }
673
adxl367_set_temp_adc_mask_en(struct adxl367_state * st,const unsigned long * active_scan_mask,bool en)674 static int adxl367_set_temp_adc_mask_en(struct adxl367_state *st,
675 const unsigned long *active_scan_mask,
676 bool en)
677 {
678 if (*active_scan_mask & ADXL367_TEMP_CHANNEL_MASK)
679 return adxl367_set_temp_adc_en(st, ADXL367_REG_TEMP_CTL, en);
680 else if (*active_scan_mask & ADXL367_EX_ADC_CHANNEL_MASK)
681 return adxl367_set_temp_adc_en(st, ADXL367_REG_ADC_CTL, en);
682
683 return 0;
684 }
685
adxl367_find_odr(struct adxl367_state * st,int val,int val2,enum adxl367_odr * odr)686 static int adxl367_find_odr(struct adxl367_state *st, int val, int val2,
687 enum adxl367_odr *odr)
688 {
689 size_t size = ARRAY_SIZE(adxl367_samp_freq_tbl);
690 int i;
691
692 for (i = 0; i < size; i++)
693 if (val == adxl367_samp_freq_tbl[i][0] &&
694 val2 == adxl367_samp_freq_tbl[i][1])
695 break;
696
697 if (i == size)
698 return -EINVAL;
699
700 *odr = i;
701
702 return 0;
703 }
704
adxl367_find_range(struct adxl367_state * st,int val,int val2,enum adxl367_range * range)705 static int adxl367_find_range(struct adxl367_state *st, int val, int val2,
706 enum adxl367_range *range)
707 {
708 size_t size = ARRAY_SIZE(adxl367_range_scale_tbl);
709 int i;
710
711 for (i = 0; i < size; i++)
712 if (val == adxl367_range_scale_tbl[i][0] &&
713 val2 == adxl367_range_scale_tbl[i][1])
714 break;
715
716 if (i == size)
717 return -EINVAL;
718
719 *range = i;
720
721 return 0;
722 }
723
adxl367_read_sample(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val)724 static int adxl367_read_sample(struct iio_dev *indio_dev,
725 struct iio_chan_spec const *chan,
726 int *val)
727 {
728 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
729 struct adxl367_state *st = iio_priv(indio_dev);
730 u16 sample;
731 int ret;
732
733 guard(mutex)(&st->lock);
734
735 ret = adxl367_set_temp_adc_reg_en(st, chan->address, true);
736 if (ret)
737 return ret;
738
739 ret = regmap_bulk_read(st->regmap, chan->address, &st->sample_buf,
740 sizeof(st->sample_buf));
741 if (ret)
742 return ret;
743
744 sample = FIELD_GET(ADXL367_DATA_MASK, be16_to_cpu(st->sample_buf));
745 *val = sign_extend32(sample, chan->scan_type.realbits - 1);
746
747 ret = adxl367_set_temp_adc_reg_en(st, chan->address, false);
748 if (ret)
749 return ret;
750
751 return IIO_VAL_INT;
752 }
753 unreachable();
754 }
755
adxl367_get_status(struct adxl367_state * st,u8 * status,u16 * fifo_entries)756 static int adxl367_get_status(struct adxl367_state *st, u8 *status,
757 u16 *fifo_entries)
758 {
759 int ret;
760
761 /* Read STATUS, FIFO_ENT_L and FIFO_ENT_H */
762 ret = regmap_bulk_read(st->regmap, ADXL367_REG_STATUS,
763 st->status_buf, sizeof(st->status_buf));
764 if (ret)
765 return ret;
766
767 st->status_buf[2] &= ADXL367_FIFO_ENT_H_MASK;
768
769 *status = st->status_buf[0];
770 *fifo_entries = get_unaligned_le16(&st->status_buf[1]);
771
772 return 0;
773 }
774
adxl367_push_event(struct iio_dev * indio_dev,u8 status)775 static bool adxl367_push_event(struct iio_dev *indio_dev, u8 status)
776 {
777 unsigned int ev_dir;
778
779 if (FIELD_GET(ADXL367_STATUS_ACT_MASK, status))
780 ev_dir = IIO_EV_DIR_RISING;
781 else if (FIELD_GET(ADXL367_STATUS_INACT_MASK, status))
782 ev_dir = IIO_EV_DIR_FALLING;
783 else
784 return false;
785
786 iio_push_event(indio_dev,
787 IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
788 IIO_EV_TYPE_THRESH, ev_dir),
789 iio_get_time_ns(indio_dev));
790
791 return true;
792 }
793
adxl367_push_fifo_data(struct iio_dev * indio_dev,u8 status,u16 fifo_entries)794 static bool adxl367_push_fifo_data(struct iio_dev *indio_dev, u8 status,
795 u16 fifo_entries)
796 {
797 struct adxl367_state *st = iio_priv(indio_dev);
798 int ret;
799 int i;
800
801 if (!FIELD_GET(ADXL367_STATUS_FIFO_FULL_MASK, status))
802 return false;
803
804 fifo_entries -= fifo_entries % st->fifo_set_size;
805
806 ret = st->ops->read_fifo(st->context, st->fifo_buf, fifo_entries);
807 if (ret) {
808 dev_err(st->dev, "Failed to read FIFO: %d\n", ret);
809 return true;
810 }
811
812 for (i = 0; i < fifo_entries; i += st->fifo_set_size)
813 iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
814
815 return true;
816 }
817
adxl367_irq_handler(int irq,void * private)818 static irqreturn_t adxl367_irq_handler(int irq, void *private)
819 {
820 struct iio_dev *indio_dev = private;
821 struct adxl367_state *st = iio_priv(indio_dev);
822 u16 fifo_entries;
823 bool handled;
824 u8 status;
825 int ret;
826
827 ret = adxl367_get_status(st, &status, &fifo_entries);
828 if (ret)
829 return IRQ_NONE;
830
831 handled = adxl367_push_event(indio_dev, status);
832 handled |= adxl367_push_fifo_data(indio_dev, status, fifo_entries);
833
834 return handled ? IRQ_HANDLED : IRQ_NONE;
835 }
836
adxl367_reg_access(struct iio_dev * indio_dev,unsigned int reg,unsigned int writeval,unsigned int * readval)837 static int adxl367_reg_access(struct iio_dev *indio_dev,
838 unsigned int reg,
839 unsigned int writeval,
840 unsigned int *readval)
841 {
842 struct adxl367_state *st = iio_priv(indio_dev);
843
844 if (readval)
845 return regmap_read(st->regmap, reg, readval);
846 else
847 return regmap_write(st->regmap, reg, writeval);
848 }
849
adxl367_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long info)850 static int adxl367_read_raw(struct iio_dev *indio_dev,
851 struct iio_chan_spec const *chan,
852 int *val, int *val2, long info)
853 {
854 struct adxl367_state *st = iio_priv(indio_dev);
855
856 switch (info) {
857 case IIO_CHAN_INFO_RAW:
858 return adxl367_read_sample(indio_dev, chan, val);
859 case IIO_CHAN_INFO_SCALE:
860 switch (chan->type) {
861 case IIO_ACCEL: {
862 guard(mutex)(&st->lock);
863 *val = adxl367_range_scale_tbl[st->range][0];
864 *val2 = adxl367_range_scale_tbl[st->range][1];
865 return IIO_VAL_INT_PLUS_NANO;
866 }
867 case IIO_TEMP:
868 *val = 1000;
869 *val2 = ADXL367_TEMP_PER_C;
870 return IIO_VAL_FRACTIONAL;
871 case IIO_VOLTAGE:
872 *val = ADXL367_VOLTAGE_MAX_MV;
873 *val2 = ADXL367_VOLTAGE_MAX_RAW;
874 return IIO_VAL_FRACTIONAL;
875 default:
876 return -EINVAL;
877 }
878 case IIO_CHAN_INFO_OFFSET:
879 switch (chan->type) {
880 case IIO_TEMP:
881 *val = 25 * ADXL367_TEMP_PER_C - ADXL367_TEMP_25C;
882 return IIO_VAL_INT;
883 case IIO_VOLTAGE:
884 *val = ADXL367_VOLTAGE_OFFSET;
885 return IIO_VAL_INT;
886 default:
887 return -EINVAL;
888 }
889 case IIO_CHAN_INFO_SAMP_FREQ: {
890 guard(mutex)(&st->lock);
891 *val = adxl367_samp_freq_tbl[st->odr][0];
892 *val2 = adxl367_samp_freq_tbl[st->odr][1];
893 return IIO_VAL_INT_PLUS_MICRO;
894 }
895 default:
896 return -EINVAL;
897 }
898 }
899
adxl367_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long info)900 static int adxl367_write_raw(struct iio_dev *indio_dev,
901 struct iio_chan_spec const *chan,
902 int val, int val2, long info)
903 {
904 struct adxl367_state *st = iio_priv(indio_dev);
905 int ret;
906
907 switch (info) {
908 case IIO_CHAN_INFO_SAMP_FREQ: {
909 enum adxl367_odr odr;
910
911 ret = adxl367_find_odr(st, val, val2, &odr);
912 if (ret)
913 return ret;
914
915 return adxl367_set_odr(indio_dev, odr);
916 }
917 case IIO_CHAN_INFO_SCALE: {
918 enum adxl367_range range;
919
920 ret = adxl367_find_range(st, val, val2, &range);
921 if (ret)
922 return ret;
923
924 return adxl367_set_range(indio_dev, range);
925 }
926 default:
927 return -EINVAL;
928 }
929 }
930
adxl367_write_raw_get_fmt(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,long info)931 static int adxl367_write_raw_get_fmt(struct iio_dev *indio_dev,
932 struct iio_chan_spec const *chan,
933 long info)
934 {
935 switch (info) {
936 case IIO_CHAN_INFO_SCALE:
937 if (chan->type != IIO_ACCEL)
938 return -EINVAL;
939
940 return IIO_VAL_INT_PLUS_NANO;
941 default:
942 return IIO_VAL_INT_PLUS_MICRO;
943 }
944 }
945
adxl367_read_avail(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,const int ** vals,int * type,int * length,long info)946 static int adxl367_read_avail(struct iio_dev *indio_dev,
947 struct iio_chan_spec const *chan,
948 const int **vals, int *type, int *length,
949 long info)
950 {
951 switch (info) {
952 case IIO_CHAN_INFO_SCALE:
953 if (chan->type != IIO_ACCEL)
954 return -EINVAL;
955
956 *vals = (int *)adxl367_range_scale_tbl;
957 *type = IIO_VAL_INT_PLUS_NANO;
958 *length = ARRAY_SIZE(adxl367_range_scale_tbl) * 2;
959 return IIO_AVAIL_LIST;
960 case IIO_CHAN_INFO_SAMP_FREQ:
961 *vals = (int *)adxl367_samp_freq_tbl;
962 *type = IIO_VAL_INT_PLUS_MICRO;
963 *length = ARRAY_SIZE(adxl367_samp_freq_tbl) * 2;
964 return IIO_AVAIL_LIST;
965 default:
966 return -EINVAL;
967 }
968 }
969
adxl367_read_event_value(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int * val,int * val2)970 static int adxl367_read_event_value(struct iio_dev *indio_dev,
971 const struct iio_chan_spec *chan,
972 enum iio_event_type type,
973 enum iio_event_direction dir,
974 enum iio_event_info info,
975 int *val, int *val2)
976 {
977 struct adxl367_state *st = iio_priv(indio_dev);
978
979 guard(mutex)(&st->lock);
980 switch (info) {
981 case IIO_EV_INFO_VALUE: {
982 switch (dir) {
983 case IIO_EV_DIR_RISING:
984 *val = st->act_threshold;
985 return IIO_VAL_INT;
986 case IIO_EV_DIR_FALLING:
987 *val = st->inact_threshold;
988 return IIO_VAL_INT;
989 default:
990 return -EINVAL;
991 }
992 }
993 case IIO_EV_INFO_PERIOD:
994 switch (dir) {
995 case IIO_EV_DIR_RISING:
996 *val = st->act_time_ms;
997 *val2 = 1000;
998 return IIO_VAL_FRACTIONAL;
999 case IIO_EV_DIR_FALLING:
1000 *val = st->inact_time_ms;
1001 *val2 = 1000;
1002 return IIO_VAL_FRACTIONAL;
1003 default:
1004 return -EINVAL;
1005 }
1006 default:
1007 return -EINVAL;
1008 }
1009 }
1010
adxl367_write_event_value(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int val,int val2)1011 static int adxl367_write_event_value(struct iio_dev *indio_dev,
1012 const struct iio_chan_spec *chan,
1013 enum iio_event_type type,
1014 enum iio_event_direction dir,
1015 enum iio_event_info info,
1016 int val, int val2)
1017 {
1018 struct adxl367_state *st = iio_priv(indio_dev);
1019
1020 switch (info) {
1021 case IIO_EV_INFO_VALUE:
1022 if (val < 0)
1023 return -EINVAL;
1024
1025 switch (dir) {
1026 case IIO_EV_DIR_RISING:
1027 return adxl367_set_act_threshold(st, ADXL367_ACTIVITY, val);
1028 case IIO_EV_DIR_FALLING:
1029 return adxl367_set_act_threshold(st, ADXL367_INACTIVITY, val);
1030 default:
1031 return -EINVAL;
1032 }
1033 case IIO_EV_INFO_PERIOD:
1034 if (val < 0)
1035 return -EINVAL;
1036
1037 val = val * 1000 + DIV_ROUND_UP(val2, 1000);
1038 switch (dir) {
1039 case IIO_EV_DIR_RISING:
1040 return adxl367_set_act_time_ms(st, ADXL367_ACTIVITY, val);
1041 case IIO_EV_DIR_FALLING:
1042 return adxl367_set_act_time_ms(st, ADXL367_INACTIVITY, val);
1043 default:
1044 return -EINVAL;
1045 }
1046 default:
1047 return -EINVAL;
1048 }
1049 }
1050
adxl367_read_event_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir)1051 static int adxl367_read_event_config(struct iio_dev *indio_dev,
1052 const struct iio_chan_spec *chan,
1053 enum iio_event_type type,
1054 enum iio_event_direction dir)
1055 {
1056 struct adxl367_state *st = iio_priv(indio_dev);
1057 bool en;
1058 int ret;
1059
1060 switch (dir) {
1061 case IIO_EV_DIR_RISING:
1062 ret = adxl367_get_act_interrupt_en(st, ADXL367_ACTIVITY, &en);
1063 return ret ?: en;
1064 case IIO_EV_DIR_FALLING:
1065 ret = adxl367_get_act_interrupt_en(st, ADXL367_INACTIVITY, &en);
1066 return ret ?: en;
1067 default:
1068 return -EINVAL;
1069 }
1070 }
1071
adxl367_write_event_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,int state)1072 static int adxl367_write_event_config(struct iio_dev *indio_dev,
1073 const struct iio_chan_spec *chan,
1074 enum iio_event_type type,
1075 enum iio_event_direction dir,
1076 int state)
1077 {
1078 enum adxl367_activity_type act;
1079
1080 switch (dir) {
1081 case IIO_EV_DIR_RISING:
1082 act = ADXL367_ACTIVITY;
1083 break;
1084 case IIO_EV_DIR_FALLING:
1085 act = ADXL367_INACTIVITY;
1086 break;
1087 default:
1088 return -EINVAL;
1089 }
1090
1091 iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
1092 struct adxl367_state *st = iio_priv(indio_dev);
1093 int ret;
1094
1095 guard(mutex)(&st->lock);
1096
1097 ret = adxl367_set_measure_en(st, false);
1098 if (ret)
1099 return ret;
1100
1101 ret = adxl367_set_act_interrupt_en(st, act, state);
1102 if (ret)
1103 return ret;
1104
1105 ret = adxl367_set_act_en(st, act, state ? ADCL367_ACT_REF_ENABLED
1106 : ADXL367_ACT_DISABLED);
1107 if (ret)
1108 return ret;
1109
1110 return adxl367_set_measure_en(st, true);
1111 }
1112 unreachable();
1113 }
1114
adxl367_get_fifo_enabled(struct device * dev,struct device_attribute * attr,char * buf)1115 static ssize_t adxl367_get_fifo_enabled(struct device *dev,
1116 struct device_attribute *attr,
1117 char *buf)
1118 {
1119 struct adxl367_state *st = iio_priv(dev_to_iio_dev(dev));
1120 enum adxl367_fifo_mode fifo_mode;
1121 int ret;
1122
1123 ret = adxl367_get_fifo_mode(st, &fifo_mode);
1124 if (ret)
1125 return ret;
1126
1127 return sysfs_emit(buf, "%d\n", fifo_mode != ADXL367_FIFO_MODE_DISABLED);
1128 }
1129
adxl367_get_fifo_watermark(struct device * dev,struct device_attribute * attr,char * buf)1130 static ssize_t adxl367_get_fifo_watermark(struct device *dev,
1131 struct device_attribute *attr,
1132 char *buf)
1133 {
1134 struct adxl367_state *st = iio_priv(dev_to_iio_dev(dev));
1135 unsigned int fifo_watermark;
1136
1137 guard(mutex)(&st->lock);
1138 fifo_watermark = st->fifo_watermark;
1139
1140 return sysfs_emit(buf, "%d\n", fifo_watermark);
1141 }
1142
1143 IIO_STATIC_CONST_DEVICE_ATTR(hwfifo_watermark_min, "1");
1144 IIO_STATIC_CONST_DEVICE_ATTR(hwfifo_watermark_max,
1145 __stringify(ADXL367_FIFO_MAX_WATERMARK));
1146 static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
1147 adxl367_get_fifo_watermark, NULL, 0);
1148 static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
1149 adxl367_get_fifo_enabled, NULL, 0);
1150
1151 static const struct iio_dev_attr *adxl367_fifo_attributes[] = {
1152 &iio_dev_attr_hwfifo_watermark_min,
1153 &iio_dev_attr_hwfifo_watermark_max,
1154 &iio_dev_attr_hwfifo_watermark,
1155 &iio_dev_attr_hwfifo_enabled,
1156 NULL,
1157 };
1158
adxl367_set_watermark(struct iio_dev * indio_dev,unsigned int val)1159 static int adxl367_set_watermark(struct iio_dev *indio_dev, unsigned int val)
1160 {
1161 struct adxl367_state *st = iio_priv(indio_dev);
1162 int ret;
1163
1164 if (val > ADXL367_FIFO_MAX_WATERMARK)
1165 return -EINVAL;
1166
1167 guard(mutex)(&st->lock);
1168
1169 ret = adxl367_set_measure_en(st, false);
1170 if (ret)
1171 return ret;
1172
1173 ret = adxl367_set_fifo_watermark(st, val);
1174 if (ret)
1175 return ret;
1176
1177 return adxl367_set_measure_en(st, true);
1178 }
1179
adxl367_find_mask_fifo_format(const unsigned long * scan_mask,enum adxl367_fifo_format * fifo_format)1180 static bool adxl367_find_mask_fifo_format(const unsigned long *scan_mask,
1181 enum adxl367_fifo_format *fifo_format)
1182 {
1183 size_t size = ARRAY_SIZE(adxl367_fifo_formats);
1184 int i;
1185
1186 for (i = 0; i < size; i++)
1187 if (*scan_mask == adxl367_channel_masks[i])
1188 break;
1189
1190 if (i == size)
1191 return false;
1192
1193 *fifo_format = adxl367_fifo_formats[i];
1194
1195 return true;
1196 }
1197
adxl367_update_scan_mode(struct iio_dev * indio_dev,const unsigned long * active_scan_mask)1198 static int adxl367_update_scan_mode(struct iio_dev *indio_dev,
1199 const unsigned long *active_scan_mask)
1200 {
1201 struct adxl367_state *st = iio_priv(indio_dev);
1202 enum adxl367_fifo_format fifo_format;
1203 int ret;
1204
1205 if (!adxl367_find_mask_fifo_format(active_scan_mask, &fifo_format))
1206 return -EINVAL;
1207
1208 guard(mutex)(&st->lock);
1209
1210 ret = adxl367_set_measure_en(st, false);
1211 if (ret)
1212 return ret;
1213
1214 ret = adxl367_set_fifo_format(st, fifo_format);
1215 if (ret)
1216 return ret;
1217
1218 ret = adxl367_set_measure_en(st, true);
1219 if (ret)
1220 return ret;
1221
1222 st->fifo_set_size = bitmap_weight(active_scan_mask,
1223 iio_get_masklength(indio_dev));
1224
1225 return 0;
1226 }
1227
adxl367_buffer_postenable(struct iio_dev * indio_dev)1228 static int adxl367_buffer_postenable(struct iio_dev *indio_dev)
1229 {
1230 struct adxl367_state *st = iio_priv(indio_dev);
1231 int ret;
1232
1233 guard(mutex)(&st->lock);
1234
1235 ret = adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask,
1236 true);
1237 if (ret)
1238 return ret;
1239
1240 ret = adxl367_set_measure_en(st, false);
1241 if (ret)
1242 return ret;
1243
1244 ret = adxl367_set_fifo_watermark_interrupt_en(st, true);
1245 if (ret)
1246 return ret;
1247
1248 ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_STREAM);
1249 if (ret)
1250 return ret;
1251
1252 return adxl367_set_measure_en(st, true);
1253 }
1254
adxl367_buffer_predisable(struct iio_dev * indio_dev)1255 static int adxl367_buffer_predisable(struct iio_dev *indio_dev)
1256 {
1257 struct adxl367_state *st = iio_priv(indio_dev);
1258 int ret;
1259
1260 guard(mutex)(&st->lock);
1261
1262 ret = adxl367_set_measure_en(st, false);
1263 if (ret)
1264 return ret;
1265
1266 ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_DISABLED);
1267 if (ret)
1268 return ret;
1269
1270 ret = adxl367_set_fifo_watermark_interrupt_en(st, false);
1271 if (ret)
1272 return ret;
1273
1274 ret = adxl367_set_measure_en(st, true);
1275 if (ret)
1276 return ret;
1277
1278 return adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask,
1279 false);
1280 }
1281
1282 static const struct iio_buffer_setup_ops adxl367_buffer_ops = {
1283 .postenable = adxl367_buffer_postenable,
1284 .predisable = adxl367_buffer_predisable,
1285 };
1286
1287 static const struct iio_info adxl367_info = {
1288 .read_raw = adxl367_read_raw,
1289 .write_raw = adxl367_write_raw,
1290 .write_raw_get_fmt = adxl367_write_raw_get_fmt,
1291 .read_avail = adxl367_read_avail,
1292 .read_event_config = adxl367_read_event_config,
1293 .write_event_config = adxl367_write_event_config,
1294 .read_event_value = adxl367_read_event_value,
1295 .write_event_value = adxl367_write_event_value,
1296 .debugfs_reg_access = adxl367_reg_access,
1297 .hwfifo_set_watermark = adxl367_set_watermark,
1298 .update_scan_mode = adxl367_update_scan_mode,
1299 };
1300
1301 static const struct iio_event_spec adxl367_events[] = {
1302 {
1303 .type = IIO_EV_TYPE_MAG_REFERENCED,
1304 .dir = IIO_EV_DIR_RISING,
1305 .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
1306 BIT(IIO_EV_INFO_PERIOD) |
1307 BIT(IIO_EV_INFO_VALUE),
1308 },
1309 {
1310 .type = IIO_EV_TYPE_MAG_REFERENCED,
1311 .dir = IIO_EV_DIR_FALLING,
1312 .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
1313 BIT(IIO_EV_INFO_PERIOD) |
1314 BIT(IIO_EV_INFO_VALUE),
1315 },
1316 };
1317
1318 #define ADXL367_ACCEL_CHANNEL(index, reg, axis) { \
1319 .type = IIO_ACCEL, \
1320 .address = (reg), \
1321 .modified = 1, \
1322 .channel2 = IIO_MOD_##axis, \
1323 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
1324 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
1325 .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE), \
1326 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1327 .info_mask_shared_by_all_available = \
1328 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1329 .event_spec = adxl367_events, \
1330 .num_event_specs = ARRAY_SIZE(adxl367_events), \
1331 .scan_index = (index), \
1332 .scan_type = { \
1333 .sign = 's', \
1334 .realbits = 14, \
1335 .storagebits = 16, \
1336 .endianness = IIO_BE, \
1337 }, \
1338 }
1339
1340 #define ADXL367_CHANNEL(index, reg, _type) { \
1341 .type = (_type), \
1342 .address = (reg), \
1343 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
1344 BIT(IIO_CHAN_INFO_OFFSET) | \
1345 BIT(IIO_CHAN_INFO_SCALE), \
1346 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1347 .scan_index = (index), \
1348 .scan_type = { \
1349 .sign = 's', \
1350 .realbits = 14, \
1351 .storagebits = 16, \
1352 .endianness = IIO_BE, \
1353 }, \
1354 }
1355
1356 static const struct iio_chan_spec adxl367_channels[] = {
1357 ADXL367_ACCEL_CHANNEL(ADXL367_X_CHANNEL_INDEX, ADXL367_REG_X_DATA_H, X),
1358 ADXL367_ACCEL_CHANNEL(ADXL367_Y_CHANNEL_INDEX, ADXL367_REG_Y_DATA_H, Y),
1359 ADXL367_ACCEL_CHANNEL(ADXL367_Z_CHANNEL_INDEX, ADXL367_REG_Z_DATA_H, Z),
1360 ADXL367_CHANNEL(ADXL367_TEMP_CHANNEL_INDEX, ADXL367_REG_TEMP_DATA_H,
1361 IIO_TEMP),
1362 ADXL367_CHANNEL(ADXL367_EX_ADC_CHANNEL_INDEX, ADXL367_REG_EX_ADC_DATA_H,
1363 IIO_VOLTAGE),
1364 };
1365
adxl367_verify_devid(struct adxl367_state * st)1366 static int adxl367_verify_devid(struct adxl367_state *st)
1367 {
1368 unsigned int val;
1369 int ret;
1370
1371 ret = regmap_read(st->regmap, ADXL367_REG_DEVID, &val);
1372 if (ret)
1373 return dev_err_probe(st->dev, ret, "Failed to read dev id\n");
1374
1375 if (val != ADXL367_DEVID_AD)
1376 return dev_err_probe(st->dev, -ENODEV,
1377 "Invalid dev id 0x%02X, expected 0x%02X\n",
1378 val, ADXL367_DEVID_AD);
1379
1380 return 0;
1381 }
1382
adxl367_setup(struct adxl367_state * st)1383 static int adxl367_setup(struct adxl367_state *st)
1384 {
1385 int ret;
1386
1387 ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY,
1388 ADXL367_2G_RANGE_1G);
1389 if (ret)
1390 return ret;
1391
1392 ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY,
1393 ADXL367_2G_RANGE_100MG);
1394 if (ret)
1395 return ret;
1396
1397 ret = adxl367_set_act_proc_mode(st, ADXL367_LOOPED);
1398 if (ret)
1399 return ret;
1400
1401 ret = _adxl367_set_odr(st, ADXL367_ODR_400HZ);
1402 if (ret)
1403 return ret;
1404
1405 ret = _adxl367_set_act_time_ms(st, 10);
1406 if (ret)
1407 return ret;
1408
1409 ret = _adxl367_set_inact_time_ms(st, 10000);
1410 if (ret)
1411 return ret;
1412
1413 return adxl367_set_measure_en(st, true);
1414 }
1415
adxl367_probe(struct device * dev,const struct adxl367_ops * ops,void * context,struct regmap * regmap,int irq)1416 int adxl367_probe(struct device *dev, const struct adxl367_ops *ops,
1417 void *context, struct regmap *regmap, int irq)
1418 {
1419 static const char * const regulator_names[] = { "vdd", "vddio" };
1420 struct iio_dev *indio_dev;
1421 struct adxl367_state *st;
1422 int ret;
1423
1424 indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
1425 if (!indio_dev)
1426 return -ENOMEM;
1427
1428 st = iio_priv(indio_dev);
1429 st->dev = dev;
1430 st->regmap = regmap;
1431 st->context = context;
1432 st->ops = ops;
1433
1434 mutex_init(&st->lock);
1435
1436 indio_dev->channels = adxl367_channels;
1437 indio_dev->num_channels = ARRAY_SIZE(adxl367_channels);
1438 indio_dev->available_scan_masks = adxl367_channel_masks;
1439 indio_dev->name = "adxl367";
1440 indio_dev->info = &adxl367_info;
1441 indio_dev->modes = INDIO_DIRECT_MODE;
1442
1443 ret = devm_regulator_bulk_get_enable(st->dev,
1444 ARRAY_SIZE(regulator_names),
1445 regulator_names);
1446 if (ret)
1447 return dev_err_probe(st->dev, ret,
1448 "Failed to get regulators\n");
1449
1450 ret = regmap_write(st->regmap, ADXL367_REG_RESET, ADXL367_RESET_CODE);
1451 if (ret)
1452 return ret;
1453
1454 fsleep(15000);
1455
1456 ret = adxl367_verify_devid(st);
1457 if (ret)
1458 return ret;
1459
1460 ret = adxl367_setup(st);
1461 if (ret)
1462 return ret;
1463
1464 ret = devm_iio_kfifo_buffer_setup_ext(st->dev, indio_dev,
1465 &adxl367_buffer_ops,
1466 adxl367_fifo_attributes);
1467 if (ret)
1468 return ret;
1469
1470 ret = devm_request_threaded_irq(st->dev, irq, NULL,
1471 adxl367_irq_handler, IRQF_ONESHOT,
1472 indio_dev->name, indio_dev);
1473 if (ret)
1474 return dev_err_probe(st->dev, ret, "Failed to request irq\n");
1475
1476 return devm_iio_device_register(dev, indio_dev);
1477 }
1478 EXPORT_SYMBOL_NS_GPL(adxl367_probe, IIO_ADXL367);
1479
1480 MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>");
1481 MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer driver");
1482 MODULE_LICENSE("GPL");
1483