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drm/client: Fix drm client endless Kconfig loop
[drm/drm-misc.git] / drivers / iio / accel / adxl380.c
blob90340f134722a3bd852d4daebab7b7c9e855f94b
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * ADXL380 3-Axis Digital Accelerometer core driver
4 *
5 * Copyright 2024 Analog Devices Inc.
6 */
7
8 #include <linux/bitfield.h>
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/module.h>
12 #include <linux/property.h>
13 #include <linux/regmap.h>
14 #include <linux/units.h>
15
16 #include <linux/unaligned.h>
17
18 #include <linux/iio/buffer.h>
19 #include <linux/iio/events.h>
20 #include <linux/iio/iio.h>
21 #include <linux/iio/kfifo_buf.h>
22 #include <linux/iio/sysfs.h>
23
24 #include <linux/regulator/consumer.h>
25
26 #include "adxl380.h"
27
28 #define ADXL380_ID_VAL 380
29 #define ADXL382_ID_VAL 382
30
31 #define ADXL380_DEVID_AD_REG 0x00
32 #define ADLX380_PART_ID_REG 0x02
33
34 #define ADXL380_X_DATA_H_REG 0x15
35 #define ADXL380_Y_DATA_H_REG 0x17
36 #define ADXL380_Z_DATA_H_REG 0x19
37 #define ADXL380_T_DATA_H_REG 0x1B
38
39 #define ADXL380_MISC_0_REG 0x20
40 #define ADXL380_XL382_MSK BIT(7)
41
42 #define ADXL380_MISC_1_REG 0x21
43
44 #define ADXL380_X_DSM_OFFSET_REG 0x4D
45
46 #define ADXL380_ACT_INACT_CTL_REG 0x37
47 #define ADXL380_INACT_EN_MSK BIT(2)
48 #define ADXL380_ACT_EN_MSK BIT(0)
49
50 #define ADXL380_SNSR_AXIS_EN_REG 0x38
51 #define ADXL380_ACT_INACT_AXIS_EN_MSK GENMASK(2, 0)
52
53 #define ADXL380_THRESH_ACT_H_REG 0x39
54 #define ADXL380_TIME_ACT_H_REG 0x3B
55 #define ADXL380_THRESH_INACT_H_REG 0x3E
56 #define ADXL380_TIME_INACT_H_REG 0x40
57 #define ADXL380_THRESH_MAX GENMASK(12, 0)
58 #define ADXL380_TIME_MAX GENMASK(24, 0)
59
60 #define ADXL380_FIFO_CONFIG_0_REG 0x30
61 #define ADXL380_FIFO_SAMPLES_8_MSK BIT(0)
62 #define ADXL380_FIFO_MODE_MSK GENMASK(5, 4)
63
64 #define ADXL380_FIFO_DISABLED 0
65 #define ADXL380_FIFO_NORMAL 1
66 #define ADXL380_FIFO_STREAMED 2
67 #define ADXL380_FIFO_TRIGGERED 3
68
69 #define ADXL380_FIFO_CONFIG_1_REG 0x31
70 #define ADXL380_FIFO_STATUS_0_REG 0x1E
71
72 #define ADXL380_TAP_THRESH_REG 0x43
73 #define ADXL380_TAP_DUR_REG 0x44
74 #define ADXL380_TAP_LATENT_REG 0x45
75 #define ADXL380_TAP_WINDOW_REG 0x46
76 #define ADXL380_TAP_TIME_MAX GENMASK(7, 0)
77
78 #define ADXL380_TAP_CFG_REG 0x47
79 #define ADXL380_TAP_AXIS_MSK GENMASK(1, 0)
80
81 #define ADXL380_TRIG_CFG_REG 0x49
82 #define ADXL380_TRIG_CFG_DEC_2X_MSK BIT(7)
83 #define ADXL380_TRIG_CFG_SINC_RATE_MSK BIT(6)
84
85 #define ADXL380_FILTER_REG 0x50
86 #define ADXL380_FILTER_EQ_FILT_MSK BIT(6)
87 #define ADXL380_FILTER_LPF_MODE_MSK GENMASK(5, 4)
88 #define ADXL380_FILTER_HPF_PATH_MSK BIT(3)
89 #define ADXL380_FILTER_HPF_CORNER_MSK GENMASK(2, 0)
90
91 #define ADXL380_OP_MODE_REG 0x26
92 #define ADXL380_OP_MODE_RANGE_MSK GENMASK(7, 6)
93 #define ADXL380_OP_MODE_MSK GENMASK(3, 0)
94 #define ADXL380_OP_MODE_STANDBY 0
95 #define ADXL380_OP_MODE_HEART_SOUND 1
96 #define ADXL380_OP_MODE_ULP 2
97 #define ADXL380_OP_MODE_VLP 3
98 #define ADXL380_OP_MODE_LP 4
99 #define ADXL380_OP_MODE_LP_ULP 6
100 #define ADXL380_OP_MODE_LP_VLP 7
101 #define ADXL380_OP_MODE_RBW 8
102 #define ADXL380_OP_MODE_RBW_ULP 10
103 #define ADXL380_OP_MODE_RBW_VLP 11
104 #define ADXL380_OP_MODE_HP 12
105 #define ADXL380_OP_MODE_HP_ULP 14
106 #define ADXL380_OP_MODE_HP_VLP 15
107
108 #define ADXL380_OP_MODE_4G_RANGE 0
109 #define ADXL382_OP_MODE_15G_RANGE 0
110 #define ADXL380_OP_MODE_8G_RANGE 1
111 #define ADXL382_OP_MODE_30G_RANGE 1
112 #define ADXL380_OP_MODE_16G_RANGE 2
113 #define ADXL382_OP_MODE_60G_RANGE 2
114
115 #define ADXL380_DIG_EN_REG 0x27
116 #define ADXL380_CHAN_EN_MSK(chan) BIT(4 + (chan))
117 #define ADXL380_FIFO_EN_MSK BIT(3)
118
119 #define ADXL380_INT0_MAP0_REG 0x2B
120 #define ADXL380_INT1_MAP0_REG 0x2D
121 #define ADXL380_INT_MAP0_INACT_INT0_MSK BIT(6)
122 #define ADXL380_INT_MAP0_ACT_INT0_MSK BIT(5)
123 #define ADXL380_INT_MAP0_FIFO_WM_INT0_MSK BIT(3)
124
125 #define ADXL380_INT0_MAP1_REG 0x2C
126 #define ADXL380_INT1_MAP1_REG 0x2E
127 #define ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK BIT(1)
128 #define ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK BIT(0)
129
130 #define ADXL380_INT0_REG 0x5D
131 #define ADXL380_INT0_POL_MSK BIT(7)
132
133 #define ADXL380_RESET_REG 0x2A
134 #define ADXL380_FIFO_DATA 0x1D
135
136 #define ADXL380_DEVID_AD_VAL 0xAD
137 #define ADXL380_RESET_CODE 0x52
138
139 #define ADXL380_STATUS_0_REG 0x11
140 #define ADXL380_STATUS_0_FIFO_FULL_MSK BIT(1)
141 #define ADXL380_STATUS_0_FIFO_WM_MSK BIT(3)
142
143 #define ADXL380_STATUS_1_INACT_MSK BIT(6)
144 #define ADXL380_STATUS_1_ACT_MSK BIT(5)
145 #define ADXL380_STATUS_1_DOUBLE_TAP_MSK BIT(1)
146 #define ADXL380_STATUS_1_SINGLE_TAP_MSK BIT(0)
147
148 #define ADXL380_FIFO_SAMPLES 315UL
149
150 enum adxl380_channels {
151 ADXL380_ACCEL_X,
152 ADXL380_ACCEL_Y,
153 ADXL380_ACCEL_Z,
154 ADXL380_TEMP,
155 ADXL380_CH_NUM
156 };
157
158 enum adxl380_axis {
159 ADXL380_X_AXIS,
160 ADXL380_Y_AXIS,
161 ADXL380_Z_AXIS,
162 };
163
164 enum adxl380_activity_type {
165 ADXL380_ACTIVITY,
166 ADXL380_INACTIVITY,
167 };
168
169 enum adxl380_tap_type {
170 ADXL380_SINGLE_TAP,
171 ADXL380_DOUBLE_TAP,
172 };
173
174 enum adxl380_tap_time_type {
175 ADXL380_TAP_TIME_LATENT,
176 ADXL380_TAP_TIME_WINDOW,
177 };
178
179 static const int adxl380_range_scale_factor_tbl[] = { 1, 2, 4 };
180
181 const struct adxl380_chip_info adxl380_chip_info = {
182 .name = "adxl380",
183 .chip_id = ADXL380_ID_VAL,
184 .scale_tbl = {
185 [ADXL380_OP_MODE_4G_RANGE] = { 0, 1307226 },
186 [ADXL380_OP_MODE_8G_RANGE] = { 0, 2615434 },
187 [ADXL380_OP_MODE_16G_RANGE] = { 0, 5229886 },
188 },
189 .samp_freq_tbl = { 8000, 16000, 32000 },
190 /*
191 * The datasheet defines an intercept of 470 LSB at 25 degC
192 * and a sensitivity of 10.2 LSB/C.
193 */
194 .temp_offset = 25 * 102 / 10 - 470,
195
196 };
197 EXPORT_SYMBOL_NS_GPL(adxl380_chip_info, "IIO_ADXL380");
198
199 const struct adxl380_chip_info adxl382_chip_info = {
200 .name = "adxl382",
201 .chip_id = ADXL382_ID_VAL,
202 .scale_tbl = {
203 [ADXL382_OP_MODE_15G_RANGE] = { 0, 4903325 },
204 [ADXL382_OP_MODE_30G_RANGE] = { 0, 9806650 },
205 [ADXL382_OP_MODE_60G_RANGE] = { 0, 19613300 },
206 },
207 .samp_freq_tbl = { 16000, 32000, 64000 },
208 /*
209 * The datasheet defines an intercept of 570 LSB at 25 degC
210 * and a sensitivity of 10.2 LSB/C.
211 */
212 .temp_offset = 25 * 102 / 10 - 570,
213 };
214 EXPORT_SYMBOL_NS_GPL(adxl382_chip_info, "IIO_ADXL380");
215
216 static const unsigned int adxl380_th_reg_high_addr[2] = {
217 [ADXL380_ACTIVITY] = ADXL380_THRESH_ACT_H_REG,
218 [ADXL380_INACTIVITY] = ADXL380_THRESH_INACT_H_REG,
219 };
220
221 static const unsigned int adxl380_time_reg_high_addr[2] = {
222 [ADXL380_ACTIVITY] = ADXL380_TIME_ACT_H_REG,
223 [ADXL380_INACTIVITY] = ADXL380_TIME_INACT_H_REG,
224 };
225
226 static const unsigned int adxl380_tap_time_reg[2] = {
227 [ADXL380_TAP_TIME_LATENT] = ADXL380_TAP_LATENT_REG,
228 [ADXL380_TAP_TIME_WINDOW] = ADXL380_TAP_WINDOW_REG,
229 };
230
231 struct adxl380_state {
232 struct regmap *regmap;
233 struct device *dev;
234 const struct adxl380_chip_info *chip_info;
235 /*
236 * Synchronize access to members of driver state, and ensure atomicity
237 * of consecutive regmap operations.
238 */
239 struct mutex lock;
240 enum adxl380_axis tap_axis_en;
241 u8 range;
242 u8 odr;
243 u8 fifo_set_size;
244 u8 transf_buf[3];
245 u16 watermark;
246 u32 act_time_ms;
247 u32 act_threshold;
248 u32 inact_time_ms;
249 u32 inact_threshold;
250 u32 tap_latent_us;
251 u32 tap_window_us;
252 u32 tap_duration_us;
253 u32 tap_threshold;
254 int irq;
255 int int_map[2];
256 int lpf_tbl[4];
257 int hpf_tbl[7][2];
258
259 __be16 fifo_buf[ADXL380_FIFO_SAMPLES] __aligned(IIO_DMA_MINALIGN);
260 };
261
262 bool adxl380_readable_noinc_reg(struct device *dev, unsigned int reg)
263 {
264 return reg == ADXL380_FIFO_DATA;
265 }
266 EXPORT_SYMBOL_NS_GPL(adxl380_readable_noinc_reg, "IIO_ADXL380");
267
268 static int adxl380_set_measure_en(struct adxl380_state *st, bool en)
269 {
270 int ret;
271 unsigned int act_inact_ctl;
272 u8 op_mode = ADXL380_OP_MODE_STANDBY;
273
274 if (en) {
275 ret = regmap_read(st->regmap, ADXL380_ACT_INACT_CTL_REG, &act_inact_ctl);
276 if (ret)
277 return ret;
278
279 /* Activity/ Inactivity detection available only in VLP/ULP mode */
280 if (FIELD_GET(ADXL380_ACT_EN_MSK, act_inact_ctl) ||
281 FIELD_GET(ADXL380_INACT_EN_MSK, act_inact_ctl))
282 op_mode = ADXL380_OP_MODE_VLP;
283 else
284 op_mode = ADXL380_OP_MODE_HP;
285 }
286
287 return regmap_update_bits(st->regmap, ADXL380_OP_MODE_REG,
288 ADXL380_OP_MODE_MSK,
289 FIELD_PREP(ADXL380_OP_MODE_MSK, op_mode));
290 }
291
292 static void adxl380_scale_act_inact_thresholds(struct adxl380_state *st,
293 u8 old_range,
294 u8 new_range)
295 {
296 st->act_threshold = mult_frac(st->act_threshold,
297 adxl380_range_scale_factor_tbl[old_range],
298 adxl380_range_scale_factor_tbl[new_range]);
299 st->inact_threshold = mult_frac(st->inact_threshold,
300 adxl380_range_scale_factor_tbl[old_range],
301 adxl380_range_scale_factor_tbl[new_range]);
302 }
303
304 static int adxl380_write_act_inact_threshold(struct adxl380_state *st,
305 enum adxl380_activity_type act,
306 unsigned int th)
307 {
308 int ret;
309 u8 reg = adxl380_th_reg_high_addr[act];
310
311 if (th > ADXL380_THRESH_MAX)
312 return -EINVAL;
313
314 ret = regmap_write(st->regmap, reg + 1, th & GENMASK(7, 0));
315 if (ret)
316 return ret;
317
318 ret = regmap_update_bits(st->regmap, reg, GENMASK(2, 0), th >> 8);
319 if (ret)
320 return ret;
321
322 if (act == ADXL380_ACTIVITY)
323 st->act_threshold = th;
324 else
325 st->inact_threshold = th;
326
327 return 0;
328 }
329
330 static int adxl380_set_act_inact_threshold(struct iio_dev *indio_dev,
331 enum adxl380_activity_type act,
332 u16 th)
333 {
334 struct adxl380_state *st = iio_priv(indio_dev);
335 int ret;
336
337 guard(mutex)(&st->lock);
338
339 ret = adxl380_set_measure_en(st, false);
340 if (ret)
341 return ret;
342
343 ret = adxl380_write_act_inact_threshold(st, act, th);
344 if (ret)
345 return ret;
346
347 return adxl380_set_measure_en(st, true);
348 }
349
350 static int adxl380_set_tap_threshold_value(struct iio_dev *indio_dev, u8 th)
351 {
352 int ret;
353 struct adxl380_state *st = iio_priv(indio_dev);
354
355 guard(mutex)(&st->lock);
356
357 ret = adxl380_set_measure_en(st, false);
358 if (ret)
359 return ret;
360
361 ret = regmap_write(st->regmap, ADXL380_TAP_THRESH_REG, th);
362 if (ret)
363 return ret;
364
365 st->tap_threshold = th;
366
367 return adxl380_set_measure_en(st, true);
368 }
369
370 static int _adxl380_write_tap_time_us(struct adxl380_state *st,
371 enum adxl380_tap_time_type tap_time_type,
372 u32 us)
373 {
374 u8 reg = adxl380_tap_time_reg[tap_time_type];
375 unsigned int reg_val;
376 int ret;
377
378 /* scale factor for tap window is 1250us / LSB */
379 reg_val = DIV_ROUND_CLOSEST(us, 1250);
380 if (reg_val > ADXL380_TAP_TIME_MAX)
381 reg_val = ADXL380_TAP_TIME_MAX;
382
383 ret = regmap_write(st->regmap, reg, reg_val);
384 if (ret)
385 return ret;
386
387 if (tap_time_type == ADXL380_TAP_TIME_WINDOW)
388 st->tap_window_us = us;
389 else
390 st->tap_latent_us = us;
391
392 return 0;
393 }
394
395 static int adxl380_write_tap_time_us(struct adxl380_state *st,
396 enum adxl380_tap_time_type tap_time_type, u32 us)
397 {
398 int ret;
399
400 guard(mutex)(&st->lock);
401
402 ret = adxl380_set_measure_en(st, false);
403 if (ret)
404 return ret;
405
406 ret = _adxl380_write_tap_time_us(st, tap_time_type, us);
407 if (ret)
408 return ret;
409
410 return adxl380_set_measure_en(st, true);
411 }
412
413 static int adxl380_write_tap_dur_us(struct iio_dev *indio_dev, u32 us)
414 {
415 int ret;
416 unsigned int reg_val;
417 struct adxl380_state *st = iio_priv(indio_dev);
418
419 /* 625us per code is the scale factor of TAP_DUR register */
420 reg_val = DIV_ROUND_CLOSEST(us, 625);
421
422 ret = adxl380_set_measure_en(st, false);
423 if (ret)
424 return ret;
425
426 ret = regmap_write(st->regmap, ADXL380_TAP_DUR_REG, reg_val);
427 if (ret)
428 return ret;
429
430 return adxl380_set_measure_en(st, true);
431 }
432
433 static int adxl380_read_chn(struct adxl380_state *st, u8 addr)
434 {
435 int ret;
436
437 guard(mutex)(&st->lock);
438
439 ret = regmap_bulk_read(st->regmap, addr, &st->transf_buf, 2);
440 if (ret)
441 return ret;
442
443 return get_unaligned_be16(st->transf_buf);
444 }
445
446 static int adxl380_get_odr(struct adxl380_state *st, int *odr)
447 {
448 int ret;
449 unsigned int trig_cfg, odr_idx;
450
451 ret = regmap_read(st->regmap, ADXL380_TRIG_CFG_REG, &trig_cfg);
452 if (ret)
453 return ret;
454
455 odr_idx = (FIELD_GET(ADXL380_TRIG_CFG_SINC_RATE_MSK, trig_cfg) << 1) |
456 (FIELD_GET(ADXL380_TRIG_CFG_DEC_2X_MSK, trig_cfg) & 1);
457
458 *odr = st->chip_info->samp_freq_tbl[odr_idx];
459
460 return 0;
461 }
462
463 static const int adxl380_lpf_div[] = {
464 1, 4, 8, 16,
465 };
466
467 static int adxl380_fill_lpf_tbl(struct adxl380_state *st)
468 {
469 int ret, i;
470 int odr;
471
472 ret = adxl380_get_odr(st, &odr);
473 if (ret)
474 return ret;
475
476 for (i = 0; i < ARRAY_SIZE(st->lpf_tbl); i++)
477 st->lpf_tbl[i] = DIV_ROUND_CLOSEST(odr, adxl380_lpf_div[i]);
478
479 return 0;
480 }
481
482 static const int adxl380_hpf_mul[] = {
483 0, 247000, 62084, 15545, 3862, 954, 238,
484 };
485
486 static int adxl380_fill_hpf_tbl(struct adxl380_state *st)
487 {
488 int i, ret, odr_hz;
489 u32 multiplier;
490 u64 div, rem, odr;
491
492 ret = adxl380_get_odr(st, &odr_hz);
493 if (ret)
494 return ret;
495
496 for (i = 0; i < ARRAY_SIZE(adxl380_hpf_mul); i++) {
497 odr = mul_u64_u32_shr(odr_hz, MEGA, 0);
498 multiplier = adxl380_hpf_mul[i];
499 div = div64_u64_rem(mul_u64_u32_shr(odr, multiplier, 0),
500 TERA * 100, &rem);
501
502 st->hpf_tbl[i][0] = div;
503 st->hpf_tbl[i][1] = div_u64(rem, MEGA * 100);
504 }
505
506 return 0;
507 }
508
509 static int adxl380_set_odr(struct adxl380_state *st, u8 odr)
510 {
511 int ret;
512
513 guard(mutex)(&st->lock);
514
515 ret = adxl380_set_measure_en(st, false);
516 if (ret)
517 return ret;
518
519 ret = regmap_update_bits(st->regmap, ADXL380_TRIG_CFG_REG,
520 ADXL380_TRIG_CFG_DEC_2X_MSK,
521 FIELD_PREP(ADXL380_TRIG_CFG_DEC_2X_MSK, odr & 1));
522 if (ret)
523 return ret;
524
525 ret = regmap_update_bits(st->regmap, ADXL380_TRIG_CFG_REG,
526 ADXL380_TRIG_CFG_SINC_RATE_MSK,
527 FIELD_PREP(ADXL380_TRIG_CFG_SINC_RATE_MSK, odr >> 1));
528 if (ret)
529 return ret;
530
531 ret = adxl380_set_measure_en(st, true);
532 if (ret)
533 return ret;
534
535 ret = adxl380_fill_lpf_tbl(st);
536 if (ret)
537 return ret;
538
539 return adxl380_fill_hpf_tbl(st);
540 }
541
542 static int adxl380_find_match_1d_tbl(const int *array, unsigned int size,
543 int val)
544 {
545 int i;
546
547 for (i = 0; i < size; i++) {
548 if (val == array[i])
549 return i;
550 }
551
552 return size - 1;
553 }
554
555 static int adxl380_find_match_2d_tbl(const int (*freq_tbl)[2], int n, int val, int val2)
556 {
557 int i;
558
559 for (i = 0; i < n; i++) {
560 if (freq_tbl[i][0] == val && freq_tbl[i][1] == val2)
561 return i;
562 }
563
564 return -EINVAL;
565 }
566
567 static int adxl380_get_lpf(struct adxl380_state *st, int *lpf)
568 {
569 int ret;
570 unsigned int trig_cfg, lpf_idx;
571
572 guard(mutex)(&st->lock);
573
574 ret = regmap_read(st->regmap, ADXL380_FILTER_REG, &trig_cfg);
575 if (ret)
576 return ret;
577
578 lpf_idx = FIELD_GET(ADXL380_FILTER_LPF_MODE_MSK, trig_cfg);
579
580 *lpf = st->lpf_tbl[lpf_idx];
581
582 return 0;
583 }
584
585 static int adxl380_set_lpf(struct adxl380_state *st, u8 lpf)
586 {
587 int ret;
588 u8 eq_bypass = 0;
589
590 guard(mutex)(&st->lock);
591
592 ret = adxl380_set_measure_en(st, false);
593 if (ret)
594 return ret;
595
596 if (lpf)
597 eq_bypass = 1;
598
599 ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
600 ADXL380_FILTER_EQ_FILT_MSK,
601 FIELD_PREP(ADXL380_FILTER_EQ_FILT_MSK, eq_bypass));
602 if (ret)
603 return ret;
604
605 ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
606 ADXL380_FILTER_LPF_MODE_MSK,
607 FIELD_PREP(ADXL380_FILTER_LPF_MODE_MSK, lpf));
608 if (ret)
609 return ret;
610
611 return adxl380_set_measure_en(st, true);
612 }
613
614 static int adxl380_get_hpf(struct adxl380_state *st, int *hpf_int, int *hpf_frac)
615 {
616 int ret;
617 unsigned int trig_cfg, hpf_idx;
618
619 guard(mutex)(&st->lock);
620
621 ret = regmap_read(st->regmap, ADXL380_FILTER_REG, &trig_cfg);
622 if (ret)
623 return ret;
624
625 hpf_idx = FIELD_GET(ADXL380_FILTER_HPF_CORNER_MSK, trig_cfg);
626
627 *hpf_int = st->hpf_tbl[hpf_idx][0];
628 *hpf_frac = st->hpf_tbl[hpf_idx][1];
629
630 return 0;
631 }
632
633 static int adxl380_set_hpf(struct adxl380_state *st, u8 hpf)
634 {
635 int ret;
636 u8 hpf_path = 0;
637
638 guard(mutex)(&st->lock);
639
640 ret = adxl380_set_measure_en(st, false);
641 if (ret)
642 return ret;
643
644 if (hpf)
645 hpf_path = 1;
646
647 ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
648 ADXL380_FILTER_HPF_PATH_MSK,
649 FIELD_PREP(ADXL380_FILTER_HPF_PATH_MSK, hpf_path));
650 if (ret)
651 return ret;
652
653 ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
654 ADXL380_FILTER_HPF_CORNER_MSK,
655 FIELD_PREP(ADXL380_FILTER_HPF_CORNER_MSK, hpf));
656 if (ret)
657 return ret;
658
659 return adxl380_set_measure_en(st, true);
660 }
661
662 static int _adxl380_set_act_inact_time_ms(struct adxl380_state *st,
663 enum adxl380_activity_type act,
664 u32 ms)
665 {
666 u8 reg = adxl380_time_reg_high_addr[act];
667 unsigned int reg_val;
668 int ret;
669
670 /* 500us per code is the scale factor of TIME_ACT / TIME_INACT registers */
671 reg_val = min(DIV_ROUND_CLOSEST(ms * 1000, 500), ADXL380_TIME_MAX);
672
673 put_unaligned_be24(reg_val, &st->transf_buf[0]);
674
675 ret = regmap_bulk_write(st->regmap, reg, st->transf_buf, sizeof(st->transf_buf));
676 if (ret)
677 return ret;
678
679 if (act == ADXL380_ACTIVITY)
680 st->act_time_ms = ms;
681 else
682 st->inact_time_ms = ms;
683
684 return 0;
685 }
686
687 static int adxl380_set_act_inact_time_ms(struct adxl380_state *st,
688 enum adxl380_activity_type act,
689 u32 ms)
690 {
691 int ret;
692
693 guard(mutex)(&st->lock);
694
695 ret = adxl380_set_measure_en(st, false);
696 if (ret)
697 return ret;
698
699 ret = _adxl380_set_act_inact_time_ms(st, act, ms);
700 if (ret)
701 return ret;
702
703 return adxl380_set_measure_en(st, true);
704 }
705
706 static int adxl380_set_range(struct adxl380_state *st, u8 range)
707 {
708 int ret;
709
710 guard(mutex)(&st->lock);
711
712 ret = adxl380_set_measure_en(st, false);
713 if (ret)
714 return ret;
715
716 ret = regmap_update_bits(st->regmap, ADXL380_OP_MODE_REG,
717 ADXL380_OP_MODE_RANGE_MSK,
718 FIELD_PREP(ADXL380_OP_MODE_RANGE_MSK, range));
719
720 if (ret)
721 return ret;
722
723 adxl380_scale_act_inact_thresholds(st, st->range, range);
724
725 /* Activity thresholds depend on range */
726 ret = adxl380_write_act_inact_threshold(st, ADXL380_ACTIVITY,
727 st->act_threshold);
728 if (ret)
729 return ret;
730
731 ret = adxl380_write_act_inact_threshold(st, ADXL380_INACTIVITY,
732 st->inact_threshold);
733 if (ret)
734 return ret;
735
736 st->range = range;
737
738 return adxl380_set_measure_en(st, true);
739 }
740
741 static int adxl380_write_act_inact_en(struct adxl380_state *st,
742 enum adxl380_activity_type type,
743 bool en)
744 {
745 if (type == ADXL380_ACTIVITY)
746 return regmap_update_bits(st->regmap, ADXL380_ACT_INACT_CTL_REG,
747 ADXL380_ACT_EN_MSK,
748 FIELD_PREP(ADXL380_ACT_EN_MSK, en));
749
750 return regmap_update_bits(st->regmap, ADXL380_ACT_INACT_CTL_REG,
751 ADXL380_INACT_EN_MSK,
752 FIELD_PREP(ADXL380_INACT_EN_MSK, en));
753 }
754
755 static int adxl380_read_act_inact_int(struct adxl380_state *st,
756 enum adxl380_activity_type type,
757 bool *en)
758 {
759 int ret;
760 unsigned int reg_val;
761
762 guard(mutex)(&st->lock);
763
764 ret = regmap_read(st->regmap, st->int_map[0], &reg_val);
765 if (ret)
766 return ret;
767
768 if (type == ADXL380_ACTIVITY)
769 *en = FIELD_GET(ADXL380_INT_MAP0_ACT_INT0_MSK, reg_val);
770 else
771 *en = FIELD_GET(ADXL380_INT_MAP0_INACT_INT0_MSK, reg_val);
772
773 return 0;
774 }
775
776 static int adxl380_write_act_inact_int(struct adxl380_state *st,
777 enum adxl380_activity_type act,
778 bool en)
779 {
780 if (act == ADXL380_ACTIVITY)
781 return regmap_update_bits(st->regmap, st->int_map[0],
782 ADXL380_INT_MAP0_ACT_INT0_MSK,
783 FIELD_PREP(ADXL380_INT_MAP0_ACT_INT0_MSK, en));
784
785 return regmap_update_bits(st->regmap, st->int_map[0],
786 ADXL380_INT_MAP0_INACT_INT0_MSK,
787 FIELD_PREP(ADXL380_INT_MAP0_INACT_INT0_MSK, en));
788 }
789
790 static int adxl380_act_inact_config(struct adxl380_state *st,
791 enum adxl380_activity_type type,
792 bool en)
793 {
794 int ret;
795
796 guard(mutex)(&st->lock);
797
798 ret = adxl380_set_measure_en(st, false);
799 if (ret)
800 return ret;
801
802 ret = adxl380_write_act_inact_en(st, type, en);
803 if (ret)
804 return ret;
805
806 ret = adxl380_write_act_inact_int(st, type, en);
807 if (ret)
808 return ret;
809
810 return adxl380_set_measure_en(st, true);
811 }
812
813 static int adxl380_write_tap_axis(struct adxl380_state *st,
814 enum adxl380_axis axis)
815 {
816 int ret;
817
818 ret = regmap_update_bits(st->regmap, ADXL380_TAP_CFG_REG,
819 ADXL380_TAP_AXIS_MSK,
820 FIELD_PREP(ADXL380_TAP_AXIS_MSK, axis));
821
822 if (ret)
823 return ret;
824
825 st->tap_axis_en = axis;
826
827 return 0;
828 }
829
830 static int adxl380_read_tap_int(struct adxl380_state *st, enum adxl380_tap_type type, bool *en)
831 {
832 int ret;
833 unsigned int reg_val;
834
835 ret = regmap_read(st->regmap, st->int_map[1], &reg_val);
836 if (ret)
837 return ret;
838
839 if (type == ADXL380_SINGLE_TAP)
840 *en = FIELD_GET(ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK, reg_val);
841 else
842 *en = FIELD_GET(ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK, reg_val);
843
844 return 0;
845 }
846
847 static int adxl380_write_tap_int(struct adxl380_state *st, enum adxl380_tap_type type, bool en)
848 {
849 if (type == ADXL380_SINGLE_TAP)
850 return regmap_update_bits(st->regmap, st->int_map[1],
851 ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK,
852 FIELD_PREP(ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK, en));
853
854 return regmap_update_bits(st->regmap, st->int_map[1],
855 ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK,
856 FIELD_PREP(ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK, en));
857 }
858
859 static int adxl380_tap_config(struct adxl380_state *st,
860 enum adxl380_axis axis,
861 enum adxl380_tap_type type,
862 bool en)
863 {
864 int ret;
865
866 guard(mutex)(&st->lock);
867
868 ret = adxl380_set_measure_en(st, false);
869 if (ret)
870 return ret;
871
872 ret = adxl380_write_tap_axis(st, axis);
873 if (ret)
874 return ret;
875
876 ret = adxl380_write_tap_int(st, type, en);
877 if (ret)
878 return ret;
879
880 return adxl380_set_measure_en(st, true);
881 }
882
883 static int adxl380_set_fifo_samples(struct adxl380_state *st)
884 {
885 int ret;
886 u16 fifo_samples = st->watermark * st->fifo_set_size;
887
888 ret = regmap_update_bits(st->regmap, ADXL380_FIFO_CONFIG_0_REG,
889 ADXL380_FIFO_SAMPLES_8_MSK,
890 FIELD_PREP(ADXL380_FIFO_SAMPLES_8_MSK,
891 (fifo_samples & BIT(8))));
892 if (ret)
893 return ret;
894
895 return regmap_write(st->regmap, ADXL380_FIFO_CONFIG_1_REG,
896 fifo_samples & 0xFF);
897 }
898
899 static int adxl380_get_status(struct adxl380_state *st, u8 *status0, u8 *status1)
900 {
901 int ret;
902
903 /* STATUS0, STATUS1 are adjacent regs */
904 ret = regmap_bulk_read(st->regmap, ADXL380_STATUS_0_REG,
905 &st->transf_buf, 2);
906 if (ret)
907 return ret;
908
909 *status0 = st->transf_buf[0];
910 *status1 = st->transf_buf[1];
911
912 return 0;
913 }
914
915 static int adxl380_get_fifo_entries(struct adxl380_state *st, u16 *fifo_entries)
916 {
917 int ret;
918
919 ret = regmap_bulk_read(st->regmap, ADXL380_FIFO_STATUS_0_REG,
920 &st->transf_buf, 2);
921 if (ret)
922 return ret;
923
924 *fifo_entries = st->transf_buf[0] | ((BIT(0) & st->transf_buf[1]) << 8);
925
926 return 0;
927 }
928
929 static void adxl380_push_event(struct iio_dev *indio_dev, s64 timestamp,
930 u8 status1)
931 {
932 if (FIELD_GET(ADXL380_STATUS_1_ACT_MSK, status1))
933 iio_push_event(indio_dev,
934 IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
935 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
936 timestamp);
937
938 if (FIELD_GET(ADXL380_STATUS_1_INACT_MSK, status1))
939 iio_push_event(indio_dev,
940 IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
941 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
942 timestamp);
943 if (FIELD_GET(ADXL380_STATUS_1_SINGLE_TAP_MSK, status1))
944 iio_push_event(indio_dev,
945 IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
946 IIO_EV_TYPE_GESTURE, IIO_EV_DIR_SINGLETAP),
947 timestamp);
948
949 if (FIELD_GET(ADXL380_STATUS_1_DOUBLE_TAP_MSK, status1))
950 iio_push_event(indio_dev,
951 IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
952 IIO_EV_TYPE_GESTURE, IIO_EV_DIR_DOUBLETAP),
953 timestamp);
954 }
955
956 static irqreturn_t adxl380_irq_handler(int irq, void *p)
957 {
958 struct iio_dev *indio_dev = p;
959 struct adxl380_state *st = iio_priv(indio_dev);
960 u8 status0, status1;
961 u16 fifo_entries;
962 int i;
963 int ret;
964
965 guard(mutex)(&st->lock);
966
967 ret = adxl380_get_status(st, &status0, &status1);
968 if (ret)
969 return IRQ_HANDLED;
970
971 adxl380_push_event(indio_dev, iio_get_time_ns(indio_dev), status1);
972
973 if (!FIELD_GET(ADXL380_STATUS_0_FIFO_WM_MSK, status0))
974 return IRQ_HANDLED;
975
976 ret = adxl380_get_fifo_entries(st, &fifo_entries);
977 if (ret)
978 return IRQ_HANDLED;
979
980 for (i = 0; i < fifo_entries; i += st->fifo_set_size) {
981 ret = regmap_noinc_read(st->regmap, ADXL380_FIFO_DATA,
982 &st->fifo_buf[i],
983 2 * st->fifo_set_size);
984 if (ret)
985 return IRQ_HANDLED;
986 iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
987 }
988
989 return IRQ_HANDLED;
990 }
991
992 static int adxl380_write_calibbias_value(struct adxl380_state *st,
993 unsigned long chan_addr,
994 s8 calibbias)
995 {
996 int ret;
997
998 guard(mutex)(&st->lock);
999
1000 ret = adxl380_set_measure_en(st, false);
1001 if (ret)
1002 return ret;
1003
1004 ret = regmap_write(st->regmap, ADXL380_X_DSM_OFFSET_REG + chan_addr, calibbias);
1005 if (ret)
1006 return ret;
1007
1008 return adxl380_set_measure_en(st, true);
1009 }
1010
1011 static int adxl380_read_calibbias_value(struct adxl380_state *st,
1012 unsigned long chan_addr,
1013 int *calibbias)
1014 {
1015 int ret;
1016 unsigned int reg_val;
1017
1018 guard(mutex)(&st->lock);
1019
1020 ret = regmap_read(st->regmap, ADXL380_X_DSM_OFFSET_REG + chan_addr, &reg_val);
1021 if (ret)
1022 return ret;
1023
1024 *calibbias = sign_extend32(reg_val, 7);
1025
1026 return 0;
1027 }
1028
1029 static ssize_t hwfifo_watermark_min_show(struct device *dev,
1030 struct device_attribute *attr,
1031 char *buf)
1032 {
1033 return sysfs_emit(buf, "1\n");
1034 }
1035
1036 static ssize_t hwfifo_watermark_max_show(struct device *dev,
1037 struct device_attribute *attr,
1038 char *buf)
1039 {
1040 return sysfs_emit(buf, "%lu\n", ADXL380_FIFO_SAMPLES);
1041 }
1042
1043 static ssize_t adxl380_get_fifo_watermark(struct device *dev,
1044 struct device_attribute *attr,
1045 char *buf)
1046 {
1047 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1048 struct adxl380_state *st = iio_priv(indio_dev);
1049
1050 return sysfs_emit(buf, "%d\n", st->watermark);
1051 }
1052
1053 static ssize_t adxl380_get_fifo_enabled(struct device *dev,
1054 struct device_attribute *attr,
1055 char *buf)
1056 {
1057 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1058 struct adxl380_state *st = iio_priv(indio_dev);
1059 int ret;
1060 unsigned int reg_val;
1061
1062 ret = regmap_read(st->regmap, ADXL380_DIG_EN_REG, &reg_val);
1063 if (ret)
1064 return ret;
1065
1066 return sysfs_emit(buf, "%lu\n",
1067 FIELD_GET(ADXL380_FIFO_EN_MSK, reg_val));
1068 }
1069
1070 static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
1071 static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
1072 static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
1073 adxl380_get_fifo_watermark, NULL, 0);
1074 static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
1075 adxl380_get_fifo_enabled, NULL, 0);
1076
1077 static const struct iio_dev_attr *adxl380_fifo_attributes[] = {
1078 &iio_dev_attr_hwfifo_watermark_min,
1079 &iio_dev_attr_hwfifo_watermark_max,
1080 &iio_dev_attr_hwfifo_watermark,
1081 &iio_dev_attr_hwfifo_enabled,
1082 NULL
1083 };
1084
1085 static int adxl380_buffer_postenable(struct iio_dev *indio_dev)
1086 {
1087 struct adxl380_state *st = iio_priv(indio_dev);
1088 int i;
1089 int ret;
1090
1091 guard(mutex)(&st->lock);
1092
1093 ret = adxl380_set_measure_en(st, false);
1094 if (ret)
1095 return ret;
1096
1097 ret = regmap_update_bits(st->regmap,
1098 st->int_map[0],
1099 ADXL380_INT_MAP0_FIFO_WM_INT0_MSK,
1100 FIELD_PREP(ADXL380_INT_MAP0_FIFO_WM_INT0_MSK, 1));
1101 if (ret)
1102 return ret;
1103
1104 for_each_clear_bit(i, indio_dev->active_scan_mask, ADXL380_CH_NUM) {
1105 ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
1106 ADXL380_CHAN_EN_MSK(i),
1107 0 << (4 + i));
1108 if (ret)
1109 return ret;
1110 }
1111
1112 st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask,
1113 iio_get_masklength(indio_dev));
1114
1115 if ((st->watermark * st->fifo_set_size) > ADXL380_FIFO_SAMPLES)
1116 st->watermark = (ADXL380_FIFO_SAMPLES / st->fifo_set_size);
1117
1118 ret = adxl380_set_fifo_samples(st);
1119 if (ret)
1120 return ret;
1121
1122 ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG, ADXL380_FIFO_EN_MSK,
1123 FIELD_PREP(ADXL380_FIFO_EN_MSK, 1));
1124 if (ret)
1125 return ret;
1126
1127 return adxl380_set_measure_en(st, true);
1128 }
1129
1130 static int adxl380_buffer_predisable(struct iio_dev *indio_dev)
1131 {
1132 struct adxl380_state *st = iio_priv(indio_dev);
1133 int ret, i;
1134
1135 guard(mutex)(&st->lock);
1136
1137 ret = adxl380_set_measure_en(st, false);
1138 if (ret)
1139 return ret;
1140
1141 ret = regmap_update_bits(st->regmap,
1142 st->int_map[0],
1143 ADXL380_INT_MAP0_FIFO_WM_INT0_MSK,
1144 FIELD_PREP(ADXL380_INT_MAP0_FIFO_WM_INT0_MSK, 0));
1145 if (ret)
1146 return ret;
1147
1148 for (i = 0; i < indio_dev->num_channels; i++) {
1149 ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
1150 ADXL380_CHAN_EN_MSK(i),
1151 1 << (4 + i));
1152 if (ret)
1153 return ret;
1154 }
1155
1156 ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG, ADXL380_FIFO_EN_MSK,
1157 FIELD_PREP(ADXL380_FIFO_EN_MSK, 0));
1158 if (ret)
1159 return ret;
1160
1161 return adxl380_set_measure_en(st, true);
1162 }
1163
1164 static const struct iio_buffer_setup_ops adxl380_buffer_ops = {
1165 .postenable = adxl380_buffer_postenable,
1166 .predisable = adxl380_buffer_predisable,
1167 };
1168
1169 static int adxl380_read_raw(struct iio_dev *indio_dev,
1170 struct iio_chan_spec const *chan,
1171 int *val, int *val2, long info)
1172 {
1173 struct adxl380_state *st = iio_priv(indio_dev);
1174 int ret;
1175
1176 switch (info) {
1177 case IIO_CHAN_INFO_RAW:
1178 ret = iio_device_claim_direct_mode(indio_dev);
1179 if (ret)
1180 return ret;
1181
1182 ret = adxl380_read_chn(st, chan->address);
1183 iio_device_release_direct_mode(indio_dev);
1184 if (ret < 0)
1185 return ret;
1186
1187 *val = sign_extend32(ret >> chan->scan_type.shift,
1188 chan->scan_type.realbits - 1);
1189 return IIO_VAL_INT;
1190 case IIO_CHAN_INFO_SCALE:
1191 switch (chan->type) {
1192 case IIO_ACCEL:
1193 scoped_guard(mutex, &st->lock) {
1194 *val = st->chip_info->scale_tbl[st->range][0];
1195 *val2 = st->chip_info->scale_tbl[st->range][1];
1196 }
1197 return IIO_VAL_INT_PLUS_NANO;
1198 case IIO_TEMP:
1199 /* 10.2 LSB / Degree Celsius */
1200 *val = 10000;
1201 *val2 = 102;
1202 return IIO_VAL_FRACTIONAL;
1203 default:
1204 return -EINVAL;
1205 }
1206 case IIO_CHAN_INFO_OFFSET:
1207 switch (chan->type) {
1208 case IIO_TEMP:
1209 *val = st->chip_info->temp_offset;
1210 return IIO_VAL_INT;
1211 default:
1212 return -EINVAL;
1213 }
1214 case IIO_CHAN_INFO_CALIBBIAS:
1215 switch (chan->type) {
1216 case IIO_ACCEL:
1217 ret = adxl380_read_calibbias_value(st, chan->scan_index, val);
1218 if (ret)
1219 return ret;
1220 return IIO_VAL_INT;
1221 default:
1222 return -EINVAL;
1223 }
1224 case IIO_CHAN_INFO_SAMP_FREQ:
1225 ret = adxl380_get_odr(st, val);
1226 if (ret)
1227 return ret;
1228 return IIO_VAL_INT;
1229 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
1230 ret = adxl380_get_lpf(st, val);
1231 if (ret)
1232 return ret;
1233 return IIO_VAL_INT;
1234 case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
1235 ret = adxl380_get_hpf(st, val, val2);
1236 if (ret)
1237 return ret;
1238 return IIO_VAL_INT_PLUS_MICRO;
1239 }
1240
1241 return -EINVAL;
1242 }
1243
1244 static int adxl380_read_avail(struct iio_dev *indio_dev,
1245 struct iio_chan_spec const *chan,
1246 const int **vals, int *type, int *length,
1247 long mask)
1248 {
1249 struct adxl380_state *st = iio_priv(indio_dev);
1250
1251 if (chan->type != IIO_ACCEL)
1252 return -EINVAL;
1253
1254 switch (mask) {
1255 case IIO_CHAN_INFO_SCALE:
1256 *vals = (const int *)st->chip_info->scale_tbl;
1257 *type = IIO_VAL_INT_PLUS_NANO;
1258 *length = ARRAY_SIZE(st->chip_info->scale_tbl) * 2;
1259 return IIO_AVAIL_LIST;
1260 case IIO_CHAN_INFO_SAMP_FREQ:
1261 *vals = (const int *)st->chip_info->samp_freq_tbl;
1262 *type = IIO_VAL_INT;
1263 *length = ARRAY_SIZE(st->chip_info->samp_freq_tbl);
1264 return IIO_AVAIL_LIST;
1265 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
1266 *vals = (const int *)st->lpf_tbl;
1267 *type = IIO_VAL_INT;
1268 *length = ARRAY_SIZE(st->lpf_tbl);
1269 return IIO_AVAIL_LIST;
1270 case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
1271 *vals = (const int *)st->hpf_tbl;
1272 *type = IIO_VAL_INT_PLUS_MICRO;
1273 /* Values are stored in a 2D matrix */
1274 *length = ARRAY_SIZE(st->hpf_tbl) * 2;
1275 return IIO_AVAIL_LIST;
1276 default:
1277 return -EINVAL;
1278 }
1279 }
1280
1281 static int adxl380_write_raw(struct iio_dev *indio_dev,
1282 struct iio_chan_spec const *chan,
1283 int val, int val2, long info)
1284 {
1285 struct adxl380_state *st = iio_priv(indio_dev);
1286 int odr_index, lpf_index, hpf_index, range_index;
1287
1288 switch (info) {
1289 case IIO_CHAN_INFO_SAMP_FREQ:
1290 odr_index = adxl380_find_match_1d_tbl(st->chip_info->samp_freq_tbl,
1291 ARRAY_SIZE(st->chip_info->samp_freq_tbl),
1292 val);
1293 return adxl380_set_odr(st, odr_index);
1294 case IIO_CHAN_INFO_CALIBBIAS:
1295 return adxl380_write_calibbias_value(st, chan->scan_index, val);
1296 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
1297 lpf_index = adxl380_find_match_1d_tbl(st->lpf_tbl,
1298 ARRAY_SIZE(st->lpf_tbl),
1299 val);
1300 return adxl380_set_lpf(st, lpf_index);
1301 case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
1302 hpf_index = adxl380_find_match_2d_tbl(st->hpf_tbl,
1303 ARRAY_SIZE(st->hpf_tbl),
1304 val, val2);
1305 if (hpf_index < 0)
1306 return hpf_index;
1307 return adxl380_set_hpf(st, hpf_index);
1308 case IIO_CHAN_INFO_SCALE:
1309 range_index = adxl380_find_match_2d_tbl(st->chip_info->scale_tbl,
1310 ARRAY_SIZE(st->chip_info->scale_tbl),
1311 val, val2);
1312 if (range_index < 0)
1313 return range_index;
1314 return adxl380_set_range(st, range_index);
1315 default:
1316 return -EINVAL;
1317 }
1318 }
1319
1320 static int adxl380_write_raw_get_fmt(struct iio_dev *indio_dev,
1321 struct iio_chan_spec const *chan,
1322 long info)
1323 {
1324 switch (info) {
1325 case IIO_CHAN_INFO_SCALE:
1326 if (chan->type != IIO_ACCEL)
1327 return -EINVAL;
1328
1329 return IIO_VAL_INT_PLUS_NANO;
1330 default:
1331 return IIO_VAL_INT_PLUS_MICRO;
1332 }
1333 }
1334
1335 static int adxl380_read_event_config(struct iio_dev *indio_dev,
1336 const struct iio_chan_spec *chan,
1337 enum iio_event_type type,
1338 enum iio_event_direction dir)
1339 {
1340 struct adxl380_state *st = iio_priv(indio_dev);
1341 int ret;
1342 bool int_en;
1343 bool tap_axis_en = false;
1344
1345 switch (chan->channel2) {
1346 case IIO_MOD_X:
1347 tap_axis_en = st->tap_axis_en == ADXL380_X_AXIS;
1348 break;
1349 case IIO_MOD_Y:
1350 tap_axis_en = st->tap_axis_en == ADXL380_Y_AXIS;
1351 break;
1352 case IIO_MOD_Z:
1353 tap_axis_en = st->tap_axis_en == ADXL380_Z_AXIS;
1354 break;
1355 default:
1356 return -EINVAL;
1357 }
1358
1359 switch (dir) {
1360 case IIO_EV_DIR_RISING:
1361 ret = adxl380_read_act_inact_int(st, ADXL380_ACTIVITY, &int_en);
1362 if (ret)
1363 return ret;
1364 return int_en;
1365 case IIO_EV_DIR_FALLING:
1366 ret = adxl380_read_act_inact_int(st, ADXL380_INACTIVITY, &int_en);
1367 if (ret)
1368 return ret;
1369 return int_en;
1370 case IIO_EV_DIR_SINGLETAP:
1371 ret = adxl380_read_tap_int(st, ADXL380_SINGLE_TAP, &int_en);
1372 if (ret)
1373 return ret;
1374 return int_en && tap_axis_en;
1375 case IIO_EV_DIR_DOUBLETAP:
1376 ret = adxl380_read_tap_int(st, ADXL380_DOUBLE_TAP, &int_en);
1377 if (ret)
1378 return ret;
1379 return int_en && tap_axis_en;
1380 default:
1381 return -EINVAL;
1382 }
1383 }
1384
1385 static int adxl380_write_event_config(struct iio_dev *indio_dev,
1386 const struct iio_chan_spec *chan,
1387 enum iio_event_type type,
1388 enum iio_event_direction dir,
1389 bool state)
1390 {
1391 struct adxl380_state *st = iio_priv(indio_dev);
1392 enum adxl380_axis axis;
1393
1394 switch (chan->channel2) {
1395 case IIO_MOD_X:
1396 axis = ADXL380_X_AXIS;
1397 break;
1398 case IIO_MOD_Y:
1399 axis = ADXL380_Y_AXIS;
1400 break;
1401 case IIO_MOD_Z:
1402 axis = ADXL380_Z_AXIS;
1403 break;
1404 default:
1405 return -EINVAL;
1406 }
1407
1408 switch (dir) {
1409 case IIO_EV_DIR_RISING:
1410 return adxl380_act_inact_config(st, ADXL380_ACTIVITY, state);
1411 case IIO_EV_DIR_FALLING:
1412 return adxl380_act_inact_config(st, ADXL380_INACTIVITY, state);
1413 case IIO_EV_DIR_SINGLETAP:
1414 return adxl380_tap_config(st, axis, ADXL380_SINGLE_TAP, state);
1415 case IIO_EV_DIR_DOUBLETAP:
1416 return adxl380_tap_config(st, axis, ADXL380_DOUBLE_TAP, state);
1417 default:
1418 return -EINVAL;
1419 }
1420 }
1421
1422 static int adxl380_read_event_value(struct iio_dev *indio_dev,
1423 const struct iio_chan_spec *chan,
1424 enum iio_event_type type,
1425 enum iio_event_direction dir,
1426 enum iio_event_info info,
1427 int *val, int *val2)
1428 {
1429 struct adxl380_state *st = iio_priv(indio_dev);
1430
1431 guard(mutex)(&st->lock);
1432
1433 switch (type) {
1434 case IIO_EV_TYPE_THRESH:
1435 switch (info) {
1436 case IIO_EV_INFO_VALUE: {
1437 switch (dir) {
1438 case IIO_EV_DIR_RISING:
1439 *val = st->act_threshold;
1440 return IIO_VAL_INT;
1441 case IIO_EV_DIR_FALLING:
1442 *val = st->inact_threshold;
1443 return IIO_VAL_INT;
1444 default:
1445 return -EINVAL;
1446 }
1447 }
1448 case IIO_EV_INFO_PERIOD:
1449 switch (dir) {
1450 case IIO_EV_DIR_RISING:
1451 *val = st->act_time_ms;
1452 *val2 = 1000;
1453 return IIO_VAL_FRACTIONAL;
1454 case IIO_EV_DIR_FALLING:
1455 *val = st->inact_time_ms;
1456 *val2 = 1000;
1457 return IIO_VAL_FRACTIONAL;
1458 default:
1459 return -EINVAL;
1460 }
1461 default:
1462 return -EINVAL;
1463 }
1464 case IIO_EV_TYPE_GESTURE:
1465 switch (info) {
1466 case IIO_EV_INFO_VALUE:
1467 *val = st->tap_threshold;
1468 return IIO_VAL_INT;
1469 case IIO_EV_INFO_RESET_TIMEOUT:
1470 *val = st->tap_window_us;
1471 *val2 = 1000000;
1472 return IIO_VAL_FRACTIONAL;
1473 case IIO_EV_INFO_TAP2_MIN_DELAY:
1474 *val = st->tap_latent_us;
1475 *val2 = 1000000;
1476 return IIO_VAL_FRACTIONAL;
1477 default:
1478 return -EINVAL;
1479 }
1480 default:
1481 return -EINVAL;
1482 }
1483 }
1484
1485 static int adxl380_write_event_value(struct iio_dev *indio_dev,
1486 const struct iio_chan_spec *chan,
1487 enum iio_event_type type, enum iio_event_direction dir,
1488 enum iio_event_info info, int val, int val2)
1489 {
1490 struct adxl380_state *st = iio_priv(indio_dev);
1491 u32 val_ms, val_us;
1492
1493 if (chan->type != IIO_ACCEL)
1494 return -EINVAL;
1495
1496 switch (type) {
1497 case IIO_EV_TYPE_THRESH:
1498 switch (info) {
1499 case IIO_EV_INFO_VALUE:
1500 switch (dir) {
1501 case IIO_EV_DIR_RISING:
1502 return adxl380_set_act_inact_threshold(indio_dev,
1503 ADXL380_ACTIVITY, val);
1504 case IIO_EV_DIR_FALLING:
1505 return adxl380_set_act_inact_threshold(indio_dev,
1506 ADXL380_INACTIVITY, val);
1507 default:
1508 return -EINVAL;
1509 }
1510 case IIO_EV_INFO_PERIOD:
1511 val_ms = val * 1000 + DIV_ROUND_UP(val2, 1000);
1512 switch (dir) {
1513 case IIO_EV_DIR_RISING:
1514 return adxl380_set_act_inact_time_ms(st,
1515 ADXL380_ACTIVITY, val_ms);
1516 case IIO_EV_DIR_FALLING:
1517 return adxl380_set_act_inact_time_ms(st,
1518 ADXL380_INACTIVITY, val_ms);
1519 default:
1520 return -EINVAL;
1521 }
1522
1523 default:
1524 return -EINVAL;
1525 }
1526 case IIO_EV_TYPE_GESTURE:
1527 switch (info) {
1528 case IIO_EV_INFO_VALUE:
1529 return adxl380_set_tap_threshold_value(indio_dev, val);
1530 case IIO_EV_INFO_RESET_TIMEOUT:
1531 val_us = val * 1000000 + val2;
1532 return adxl380_write_tap_time_us(st,
1533 ADXL380_TAP_TIME_WINDOW,
1534 val_us);
1535 case IIO_EV_INFO_TAP2_MIN_DELAY:
1536 val_us = val * 1000000 + val2;
1537 return adxl380_write_tap_time_us(st,
1538 ADXL380_TAP_TIME_LATENT,
1539 val_us);
1540 default:
1541 return -EINVAL;
1542 }
1543 default:
1544 return -EINVAL;
1545 }
1546 }
1547
1548 static ssize_t in_accel_gesture_tap_maxtomin_time_show(struct device *dev,
1549 struct device_attribute *attr,
1550 char *buf)
1551 {
1552 int vals[2];
1553 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1554 struct adxl380_state *st = iio_priv(indio_dev);
1555
1556 guard(mutex)(&st->lock);
1557
1558 vals[0] = st->tap_duration_us;
1559 vals[1] = MICRO;
1560
1561 return iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, vals);
1562 }
1563
1564 static ssize_t in_accel_gesture_tap_maxtomin_time_store(struct device *dev,
1565 struct device_attribute *attr,
1566 const char *buf, size_t len)
1567 {
1568 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1569 struct adxl380_state *st = iio_priv(indio_dev);
1570 int ret, val_int, val_fract_us;
1571
1572 guard(mutex)(&st->lock);
1573
1574 ret = iio_str_to_fixpoint(buf, 100000, &val_int, &val_fract_us);
1575 if (ret)
1576 return ret;
1577
1578 /* maximum value is 255 * 625 us = 0.159375 seconds */
1579 if (val_int || val_fract_us > 159375 || val_fract_us < 0)
1580 return -EINVAL;
1581
1582 ret = adxl380_write_tap_dur_us(indio_dev, val_fract_us);
1583 if (ret)
1584 return ret;
1585
1586 return len;
1587 }
1588
1589 static IIO_DEVICE_ATTR_RW(in_accel_gesture_tap_maxtomin_time, 0);
1590
1591 static struct attribute *adxl380_event_attributes[] = {
1592 &iio_dev_attr_in_accel_gesture_tap_maxtomin_time.dev_attr.attr,
1593 NULL
1594 };
1595
1596 static const struct attribute_group adxl380_event_attribute_group = {
1597 .attrs = adxl380_event_attributes,
1598 };
1599
1600 static int adxl380_reg_access(struct iio_dev *indio_dev,
1601 unsigned int reg,
1602 unsigned int writeval,
1603 unsigned int *readval)
1604 {
1605 struct adxl380_state *st = iio_priv(indio_dev);
1606
1607 if (readval)
1608 return regmap_read(st->regmap, reg, readval);
1609
1610 return regmap_write(st->regmap, reg, writeval);
1611 }
1612
1613 static int adxl380_set_watermark(struct iio_dev *indio_dev, unsigned int val)
1614 {
1615 struct adxl380_state *st = iio_priv(indio_dev);
1616
1617 st->watermark = min(val, ADXL380_FIFO_SAMPLES);
1618
1619 return 0;
1620 }
1621
1622 static const struct iio_info adxl380_info = {
1623 .read_raw = adxl380_read_raw,
1624 .read_avail = &adxl380_read_avail,
1625 .write_raw = adxl380_write_raw,
1626 .write_raw_get_fmt = adxl380_write_raw_get_fmt,
1627 .read_event_config = adxl380_read_event_config,
1628 .write_event_config = adxl380_write_event_config,
1629 .read_event_value = adxl380_read_event_value,
1630 .write_event_value = adxl380_write_event_value,
1631 .event_attrs = &adxl380_event_attribute_group,
1632 .debugfs_reg_access = &adxl380_reg_access,
1633 .hwfifo_set_watermark = adxl380_set_watermark,
1634 };
1635
1636 static const struct iio_event_spec adxl380_events[] = {
1637 {
1638 .type = IIO_EV_TYPE_THRESH,
1639 .dir = IIO_EV_DIR_RISING,
1640 .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
1641 BIT(IIO_EV_INFO_VALUE) |
1642 BIT(IIO_EV_INFO_PERIOD),
1643 },
1644 {
1645 .type = IIO_EV_TYPE_THRESH,
1646 .dir = IIO_EV_DIR_FALLING,
1647 .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
1648 BIT(IIO_EV_INFO_VALUE) |
1649 BIT(IIO_EV_INFO_PERIOD),
1650 },
1651 {
1652 .type = IIO_EV_TYPE_GESTURE,
1653 .dir = IIO_EV_DIR_SINGLETAP,
1654 .mask_separate = BIT(IIO_EV_INFO_ENABLE),
1655 .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
1656 BIT(IIO_EV_INFO_RESET_TIMEOUT),
1657 },
1658 {
1659 .type = IIO_EV_TYPE_GESTURE,
1660 .dir = IIO_EV_DIR_DOUBLETAP,
1661 .mask_separate = BIT(IIO_EV_INFO_ENABLE),
1662 .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
1663 BIT(IIO_EV_INFO_RESET_TIMEOUT) |
1664 BIT(IIO_EV_INFO_TAP2_MIN_DELAY),
1665 },
1666 };
1667
1668 #define ADXL380_ACCEL_CHANNEL(index, reg, axis) { \
1669 .type = IIO_ACCEL, \
1670 .address = reg, \
1671 .modified = 1, \
1672 .channel2 = IIO_MOD_##axis, \
1673 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
1674 BIT(IIO_CHAN_INFO_CALIBBIAS), \
1675 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1676 .info_mask_shared_by_all_available = \
1677 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1678 .info_mask_shared_by_type = \
1679 BIT(IIO_CHAN_INFO_SCALE) | \
1680 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
1681 BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \
1682 .info_mask_shared_by_type_available = \
1683 BIT(IIO_CHAN_INFO_SCALE) | \
1684 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
1685 BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \
1686 .scan_index = index, \
1687 .scan_type = { \
1688 .sign = 's', \
1689 .realbits = 16, \
1690 .storagebits = 16, \
1691 .endianness = IIO_BE, \
1692 }, \
1693 .event_spec = adxl380_events, \
1694 .num_event_specs = ARRAY_SIZE(adxl380_events) \
1695 }
1696
1697 static const struct iio_chan_spec adxl380_channels[] = {
1698 ADXL380_ACCEL_CHANNEL(0, ADXL380_X_DATA_H_REG, X),
1699 ADXL380_ACCEL_CHANNEL(1, ADXL380_Y_DATA_H_REG, Y),
1700 ADXL380_ACCEL_CHANNEL(2, ADXL380_Z_DATA_H_REG, Z),
1701 {
1702 .type = IIO_TEMP,
1703 .address = ADXL380_T_DATA_H_REG,
1704 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1705 BIT(IIO_CHAN_INFO_SCALE) |
1706 BIT(IIO_CHAN_INFO_OFFSET),
1707 .scan_index = 3,
1708 .scan_type = {
1709 .sign = 's',
1710 .realbits = 12,
1711 .storagebits = 16,
1712 .shift = 4,
1713 .endianness = IIO_BE,
1714 },
1715 },
1716 };
1717
1718 static int adxl380_config_irq(struct iio_dev *indio_dev)
1719 {
1720 struct adxl380_state *st = iio_priv(indio_dev);
1721 unsigned long irq_flag;
1722 u32 irq_type;
1723 u8 polarity;
1724 int ret;
1725
1726 st->irq = fwnode_irq_get_byname(dev_fwnode(st->dev), "INT0");
1727 if (st->irq > 0) {
1728 st->int_map[0] = ADXL380_INT0_MAP0_REG;
1729 st->int_map[1] = ADXL380_INT0_MAP1_REG;
1730 } else {
1731 st->irq = fwnode_irq_get_byname(dev_fwnode(st->dev), "INT1");
1732 if (st->irq > 0)
1733 return dev_err_probe(st->dev, -ENODEV,
1734 "no interrupt name specified");
1735 st->int_map[0] = ADXL380_INT1_MAP0_REG;
1736 st->int_map[1] = ADXL380_INT1_MAP1_REG;
1737 }
1738
1739 irq_type = irq_get_trigger_type(st->irq);
1740 if (irq_type == IRQ_TYPE_LEVEL_HIGH) {
1741 polarity = 0;
1742 irq_flag = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
1743 } else if (irq_type == IRQ_TYPE_LEVEL_LOW) {
1744 polarity = 1;
1745 irq_flag = IRQF_TRIGGER_LOW | IRQF_ONESHOT;
1746 } else {
1747 return dev_err_probe(st->dev, -EINVAL,
1748 "Invalid interrupt 0x%x. Only level interrupts supported\n",
1749 irq_type);
1750 }
1751
1752 ret = regmap_update_bits(st->regmap, ADXL380_INT0_REG,
1753 ADXL380_INT0_POL_MSK,
1754 FIELD_PREP(ADXL380_INT0_POL_MSK, polarity));
1755 if (ret)
1756 return ret;
1757
1758 return devm_request_threaded_irq(st->dev, st->irq, NULL,
1759 adxl380_irq_handler, irq_flag,
1760 indio_dev->name, indio_dev);
1761 }
1762
1763 static int adxl380_setup(struct iio_dev *indio_dev)
1764 {
1765 unsigned int reg_val;
1766 u16 part_id, chip_id;
1767 int ret, i;
1768 struct adxl380_state *st = iio_priv(indio_dev);
1769
1770 ret = regmap_read(st->regmap, ADXL380_DEVID_AD_REG, &reg_val);
1771 if (ret)
1772 return ret;
1773
1774 if (reg_val != ADXL380_DEVID_AD_VAL)
1775 dev_warn(st->dev, "Unknown chip id %x\n", reg_val);
1776
1777 ret = regmap_bulk_read(st->regmap, ADLX380_PART_ID_REG,
1778 &st->transf_buf, 2);
1779 if (ret)
1780 return ret;
1781
1782 part_id = get_unaligned_be16(st->transf_buf);
1783 part_id >>= 4;
1784
1785 if (part_id != ADXL380_ID_VAL)
1786 dev_warn(st->dev, "Unknown part id %x\n", part_id);
1787
1788 ret = regmap_read(st->regmap, ADXL380_MISC_0_REG, &reg_val);
1789 if (ret)
1790 return ret;
1791
1792 /* Bit to differentiate between ADXL380/382. */
1793 if (reg_val & ADXL380_XL382_MSK)
1794 chip_id = ADXL382_ID_VAL;
1795 else
1796 chip_id = ADXL380_ID_VAL;
1797
1798 if (chip_id != st->chip_info->chip_id)
1799 dev_warn(st->dev, "Unknown chip id %x\n", chip_id);
1800
1801 ret = regmap_write(st->regmap, ADXL380_RESET_REG, ADXL380_RESET_CODE);
1802 if (ret)
1803 return ret;
1804
1805 /*
1806 * A latency of approximately 0.5 ms is required after soft reset.
1807 * Stated in the register REG_RESET description.
1808 */
1809 fsleep(500);
1810
1811 for (i = 0; i < indio_dev->num_channels; i++) {
1812 ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
1813 ADXL380_CHAN_EN_MSK(i),
1814 1 << (4 + i));
1815 if (ret)
1816 return ret;
1817 }
1818
1819 ret = regmap_update_bits(st->regmap, ADXL380_FIFO_CONFIG_0_REG,
1820 ADXL380_FIFO_MODE_MSK,
1821 FIELD_PREP(ADXL380_FIFO_MODE_MSK, ADXL380_FIFO_STREAMED));
1822 if (ret)
1823 return ret;
1824
1825 /* Select all 3 axis for act/inact detection. */
1826 ret = regmap_update_bits(st->regmap, ADXL380_SNSR_AXIS_EN_REG,
1827 ADXL380_ACT_INACT_AXIS_EN_MSK,
1828 FIELD_PREP(ADXL380_ACT_INACT_AXIS_EN_MSK,
1829 ADXL380_ACT_INACT_AXIS_EN_MSK));
1830 if (ret)
1831 return ret;
1832
1833 ret = adxl380_config_irq(indio_dev);
1834 if (ret)
1835 return ret;
1836
1837 ret = adxl380_fill_lpf_tbl(st);
1838 if (ret)
1839 return ret;
1840
1841 ret = adxl380_fill_hpf_tbl(st);
1842 if (ret)
1843 return ret;
1844
1845 return adxl380_set_measure_en(st, true);
1846 }
1847
1848 int adxl380_probe(struct device *dev, struct regmap *regmap,
1849 const struct adxl380_chip_info *chip_info)
1850 {
1851 struct iio_dev *indio_dev;
1852 struct adxl380_state *st;
1853 int ret;
1854
1855 indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
1856 if (!indio_dev)
1857 return -ENOMEM;
1858
1859 st = iio_priv(indio_dev);
1860
1861 st->dev = dev;
1862 st->regmap = regmap;
1863 st->chip_info = chip_info;
1864
1865 mutex_init(&st->lock);
1866
1867 indio_dev->channels = adxl380_channels;
1868 indio_dev->num_channels = ARRAY_SIZE(adxl380_channels);
1869 indio_dev->name = chip_info->name;
1870 indio_dev->info = &adxl380_info;
1871 indio_dev->modes = INDIO_DIRECT_MODE;
1872
1873 ret = devm_regulator_get_enable(dev, "vddio");
1874 if (ret)
1875 return dev_err_probe(st->dev, ret,
1876 "Failed to get vddio regulator\n");
1877
1878 ret = devm_regulator_get_enable(st->dev, "vsupply");
1879 if (ret)
1880 return dev_err_probe(st->dev, ret,
1881 "Failed to get vsupply regulator\n");
1882
1883 ret = adxl380_setup(indio_dev);
1884 if (ret)
1885 return ret;
1886
1887 ret = devm_iio_kfifo_buffer_setup_ext(st->dev, indio_dev,
1888 &adxl380_buffer_ops,
1889 adxl380_fifo_attributes);
1890 if (ret)
1891 return ret;
1892
1893 return devm_iio_device_register(dev, indio_dev);
1894 }
1895 EXPORT_SYMBOL_NS_GPL(adxl380_probe, "IIO_ADXL380");
1896
1897 MODULE_AUTHOR("Ramona Gradinariu <ramona.gradinariu@analog.com>");
1898 MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com>");
1899 MODULE_DESCRIPTION("Analog Devices ADXL380 3-axis accelerometer driver");
1900 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes