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[mirror_ubuntu-hirsute-kernel.git] / drivers / iio / imu / fxos8700_core.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * FXOS8700 - NXP IMU (accelerometer plus magnetometer)
4 *
5 * IIO core driver for FXOS8700, with support for I2C/SPI busses
6 *
7 * TODO: Buffer, trigger, and IRQ support
8 */
9 #include <linux/module.h>
10 #include <linux/regmap.h>
11 #include <linux/acpi.h>
12 #include <linux/bitops.h>
13
14 #include <linux/iio/iio.h>
15 #include <linux/iio/sysfs.h>
16
17 #include "fxos8700.h"
18
19 /* Register Definitions */
20 #define FXOS8700_STATUS 0x00
21 #define FXOS8700_OUT_X_MSB 0x01
22 #define FXOS8700_OUT_X_LSB 0x02
23 #define FXOS8700_OUT_Y_MSB 0x03
24 #define FXOS8700_OUT_Y_LSB 0x04
25 #define FXOS8700_OUT_Z_MSB 0x05
26 #define FXOS8700_OUT_Z_LSB 0x06
27 #define FXOS8700_F_SETUP 0x09
28 #define FXOS8700_TRIG_CFG 0x0a
29 #define FXOS8700_SYSMOD 0x0b
30 #define FXOS8700_INT_SOURCE 0x0c
31 #define FXOS8700_WHO_AM_I 0x0d
32 #define FXOS8700_XYZ_DATA_CFG 0x0e
33 #define FXOS8700_HP_FILTER_CUTOFF 0x0f
34 #define FXOS8700_PL_STATUS 0x10
35 #define FXOS8700_PL_CFG 0x11
36 #define FXOS8700_PL_COUNT 0x12
37 #define FXOS8700_PL_BF_ZCOMP 0x13
38 #define FXOS8700_PL_THS_REG 0x14
39 #define FXOS8700_A_FFMT_CFG 0x15
40 #define FXOS8700_A_FFMT_SRC 0x16
41 #define FXOS8700_A_FFMT_THS 0x17
42 #define FXOS8700_A_FFMT_COUNT 0x18
43 #define FXOS8700_TRANSIENT_CFG 0x1d
44 #define FXOS8700_TRANSIENT_SRC 0x1e
45 #define FXOS8700_TRANSIENT_THS 0x1f
46 #define FXOS8700_TRANSIENT_COUNT 0x20
47 #define FXOS8700_PULSE_CFG 0x21
48 #define FXOS8700_PULSE_SRC 0x22
49 #define FXOS8700_PULSE_THSX 0x23
50 #define FXOS8700_PULSE_THSY 0x24
51 #define FXOS8700_PULSE_THSZ 0x25
52 #define FXOS8700_PULSE_TMLT 0x26
53 #define FXOS8700_PULSE_LTCY 0x27
54 #define FXOS8700_PULSE_WIND 0x28
55 #define FXOS8700_ASLP_COUNT 0x29
56 #define FXOS8700_CTRL_REG1 0x2a
57 #define FXOS8700_CTRL_REG2 0x2b
58 #define FXOS8700_CTRL_REG3 0x2c
59 #define FXOS8700_CTRL_REG4 0x2d
60 #define FXOS8700_CTRL_REG5 0x2e
61 #define FXOS8700_OFF_X 0x2f
62 #define FXOS8700_OFF_Y 0x30
63 #define FXOS8700_OFF_Z 0x31
64 #define FXOS8700_M_DR_STATUS 0x32
65 #define FXOS8700_M_OUT_X_MSB 0x33
66 #define FXOS8700_M_OUT_X_LSB 0x34
67 #define FXOS8700_M_OUT_Y_MSB 0x35
68 #define FXOS8700_M_OUT_Y_LSB 0x36
69 #define FXOS8700_M_OUT_Z_MSB 0x37
70 #define FXOS8700_M_OUT_Z_LSB 0x38
71 #define FXOS8700_CMP_X_MSB 0x39
72 #define FXOS8700_CMP_X_LSB 0x3a
73 #define FXOS8700_CMP_Y_MSB 0x3b
74 #define FXOS8700_CMP_Y_LSB 0x3c
75 #define FXOS8700_CMP_Z_MSB 0x3d
76 #define FXOS8700_CMP_Z_LSB 0x3e
77 #define FXOS8700_M_OFF_X_MSB 0x3f
78 #define FXOS8700_M_OFF_X_LSB 0x40
79 #define FXOS8700_M_OFF_Y_MSB 0x41
80 #define FXOS8700_M_OFF_Y_LSB 0x42
81 #define FXOS8700_M_OFF_Z_MSB 0x43
82 #define FXOS8700_M_OFF_Z_LSB 0x44
83 #define FXOS8700_MAX_X_MSB 0x45
84 #define FXOS8700_MAX_X_LSB 0x46
85 #define FXOS8700_MAX_Y_MSB 0x47
86 #define FXOS8700_MAX_Y_LSB 0x48
87 #define FXOS8700_MAX_Z_MSB 0x49
88 #define FXOS8700_MAX_Z_LSB 0x4a
89 #define FXOS8700_MIN_X_MSB 0x4b
90 #define FXOS8700_MIN_X_LSB 0x4c
91 #define FXOS8700_MIN_Y_MSB 0x4d
92 #define FXOS8700_MIN_Y_LSB 0x4e
93 #define FXOS8700_MIN_Z_MSB 0x4f
94 #define FXOS8700_MIN_Z_LSB 0x50
95 #define FXOS8700_TEMP 0x51
96 #define FXOS8700_M_THS_CFG 0x52
97 #define FXOS8700_M_THS_SRC 0x53
98 #define FXOS8700_M_THS_X_MSB 0x54
99 #define FXOS8700_M_THS_X_LSB 0x55
100 #define FXOS8700_M_THS_Y_MSB 0x56
101 #define FXOS8700_M_THS_Y_LSB 0x57
102 #define FXOS8700_M_THS_Z_MSB 0x58
103 #define FXOS8700_M_THS_Z_LSB 0x59
104 #define FXOS8700_M_THS_COUNT 0x5a
105 #define FXOS8700_M_CTRL_REG1 0x5b
106 #define FXOS8700_M_CTRL_REG2 0x5c
107 #define FXOS8700_M_CTRL_REG3 0x5d
108 #define FXOS8700_M_INT_SRC 0x5e
109 #define FXOS8700_A_VECM_CFG 0x5f
110 #define FXOS8700_A_VECM_THS_MSB 0x60
111 #define FXOS8700_A_VECM_THS_LSB 0x61
112 #define FXOS8700_A_VECM_CNT 0x62
113 #define FXOS8700_A_VECM_INITX_MSB 0x63
114 #define FXOS8700_A_VECM_INITX_LSB 0x64
115 #define FXOS8700_A_VECM_INITY_MSB 0x65
116 #define FXOS8700_A_VECM_INITY_LSB 0x66
117 #define FXOS8700_A_VECM_INITZ_MSB 0x67
118 #define FXOS8700_A_VECM_INITZ_LSB 0x68
119 #define FXOS8700_M_VECM_CFG 0x69
120 #define FXOS8700_M_VECM_THS_MSB 0x6a
121 #define FXOS8700_M_VECM_THS_LSB 0x6b
122 #define FXOS8700_M_VECM_CNT 0x6c
123 #define FXOS8700_M_VECM_INITX_MSB 0x6d
124 #define FXOS8700_M_VECM_INITX_LSB 0x6e
125 #define FXOS8700_M_VECM_INITY_MSB 0x6f
126 #define FXOS8700_M_VECM_INITY_LSB 0x70
127 #define FXOS8700_M_VECM_INITZ_MSB 0x71
128 #define FXOS8700_M_VECM_INITZ_LSB 0x72
129 #define FXOS8700_A_FFMT_THS_X_MSB 0x73
130 #define FXOS8700_A_FFMT_THS_X_LSB 0x74
131 #define FXOS8700_A_FFMT_THS_Y_MSB 0x75
132 #define FXOS8700_A_FFMT_THS_Y_LSB 0x76
133 #define FXOS8700_A_FFMT_THS_Z_MSB 0x77
134 #define FXOS8700_A_FFMT_THS_Z_LSB 0x78
135 #define FXOS8700_A_TRAN_INIT_MSB 0x79
136 #define FXOS8700_A_TRAN_INIT_LSB_X 0x7a
137 #define FXOS8700_A_TRAN_INIT_LSB_Y 0x7b
138 #define FXOS8700_A_TRAN_INIT_LSB_Z 0x7d
139 #define FXOS8700_TM_NVM_LOCK 0x7e
140 #define FXOS8700_NVM_DATA0_35 0x80
141 #define FXOS8700_NVM_DATA_BNK3 0xa4
142 #define FXOS8700_NVM_DATA_BNK2 0xa5
143 #define FXOS8700_NVM_DATA_BNK1 0xa6
144 #define FXOS8700_NVM_DATA_BNK0 0xa7
145
146 /* Bit definitions for FXOS8700_CTRL_REG1 */
147 #define FXOS8700_CTRL_ODR_MSK 0x38
148 #define FXOS8700_CTRL_ODR_MAX 0x00
149 #define FXOS8700_CTRL_ODR_MIN GENMASK(4, 3)
150
151 /* Bit definitions for FXOS8700_M_CTRL_REG1 */
152 #define FXOS8700_HMS_MASK GENMASK(1, 0)
153 #define FXOS8700_OS_MASK GENMASK(4, 2)
154
155 /* Bit definitions for FXOS8700_M_CTRL_REG2 */
156 #define FXOS8700_MAXMIN_RST BIT(2)
157 #define FXOS8700_MAXMIN_DIS_THS BIT(3)
158 #define FXOS8700_MAXMIN_DIS BIT(4)
159
160 #define FXOS8700_ACTIVE 0x01
161 #define FXOS8700_ACTIVE_MIN_USLEEP 4000 /* from table 6 in datasheet */
162
163 #define FXOS8700_DEVICE_ID 0xC7
164 #define FXOS8700_PRE_DEVICE_ID 0xC4
165 #define FXOS8700_DATA_BUF_SIZE 3
166
167 struct fxos8700_data {
168 struct regmap *regmap;
169 struct iio_trigger *trig;
170 __be16 buf[FXOS8700_DATA_BUF_SIZE] ____cacheline_aligned;
171 };
172
173 /* Regmap info */
174 static const struct regmap_range read_range[] = {
175 {
176 .range_min = FXOS8700_STATUS,
177 .range_max = FXOS8700_A_FFMT_COUNT,
178 }, {
179 .range_min = FXOS8700_TRANSIENT_CFG,
180 .range_max = FXOS8700_A_FFMT_THS_Z_LSB,
181 },
182 };
183
184 static const struct regmap_range write_range[] = {
185 {
186 .range_min = FXOS8700_F_SETUP,
187 .range_max = FXOS8700_TRIG_CFG,
188 }, {
189 .range_min = FXOS8700_XYZ_DATA_CFG,
190 .range_max = FXOS8700_HP_FILTER_CUTOFF,
191 }, {
192 .range_min = FXOS8700_PL_CFG,
193 .range_max = FXOS8700_A_FFMT_CFG,
194 }, {
195 .range_min = FXOS8700_A_FFMT_THS,
196 .range_max = FXOS8700_TRANSIENT_CFG,
197 }, {
198 .range_min = FXOS8700_TRANSIENT_THS,
199 .range_max = FXOS8700_PULSE_CFG,
200 }, {
201 .range_min = FXOS8700_PULSE_THSX,
202 .range_max = FXOS8700_OFF_Z,
203 }, {
204 .range_min = FXOS8700_M_OFF_X_MSB,
205 .range_max = FXOS8700_M_OFF_Z_LSB,
206 }, {
207 .range_min = FXOS8700_M_THS_CFG,
208 .range_max = FXOS8700_M_THS_CFG,
209 }, {
210 .range_min = FXOS8700_M_THS_X_MSB,
211 .range_max = FXOS8700_M_CTRL_REG3,
212 }, {
213 .range_min = FXOS8700_A_VECM_CFG,
214 .range_max = FXOS8700_A_FFMT_THS_Z_LSB,
215 },
216 };
217
218 static const struct regmap_access_table driver_read_table = {
219 .yes_ranges = read_range,
220 .n_yes_ranges = ARRAY_SIZE(read_range),
221 };
222
223 static const struct regmap_access_table driver_write_table = {
224 .yes_ranges = write_range,
225 .n_yes_ranges = ARRAY_SIZE(write_range),
226 };
227
228 const struct regmap_config fxos8700_regmap_config = {
229 .reg_bits = 8,
230 .val_bits = 8,
231 .max_register = FXOS8700_NVM_DATA_BNK0,
232 .rd_table = &driver_read_table,
233 .wr_table = &driver_write_table,
234 };
235 EXPORT_SYMBOL(fxos8700_regmap_config);
236
237 #define FXOS8700_CHANNEL(_type, _axis) { \
238 .type = _type, \
239 .modified = 1, \
240 .channel2 = IIO_MOD_##_axis, \
241 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
242 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
243 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
244 }
245
246 enum fxos8700_accel_scale_bits {
247 MODE_2G = 0,
248 MODE_4G,
249 MODE_8G,
250 };
251
252 /* scan indexes follow DATA register order */
253 enum fxos8700_scan_axis {
254 FXOS8700_SCAN_ACCEL_X = 0,
255 FXOS8700_SCAN_ACCEL_Y,
256 FXOS8700_SCAN_ACCEL_Z,
257 FXOS8700_SCAN_MAGN_X,
258 FXOS8700_SCAN_MAGN_Y,
259 FXOS8700_SCAN_MAGN_Z,
260 FXOS8700_SCAN_RHALL,
261 FXOS8700_SCAN_TIMESTAMP,
262 };
263
264 enum fxos8700_sensor {
265 FXOS8700_ACCEL = 0,
266 FXOS8700_MAGN,
267 FXOS8700_NUM_SENSORS /* must be last */
268 };
269
270 enum fxos8700_int_pin {
271 FXOS8700_PIN_INT1,
272 FXOS8700_PIN_INT2
273 };
274
275 struct fxos8700_scale {
276 u8 bits;
277 int uscale;
278 };
279
280 struct fxos8700_odr {
281 u8 bits;
282 int odr;
283 int uodr;
284 };
285
286 static const struct fxos8700_scale fxos8700_accel_scale[] = {
287 { MODE_2G, 244},
288 { MODE_4G, 488},
289 { MODE_8G, 976},
290 };
291
292 /*
293 * Accellerometer and magnetometer have the same ODR options, set in the
294 * CTRL_REG1 register. ODR is halved when using both sensors at once in
295 * hybrid mode.
296 */
297 static const struct fxos8700_odr fxos8700_odr[] = {
298 {0x00, 800, 0},
299 {0x01, 400, 0},
300 {0x02, 200, 0},
301 {0x03, 100, 0},
302 {0x04, 50, 0},
303 {0x05, 12, 500000},
304 {0x06, 6, 250000},
305 {0x07, 1, 562500},
306 };
307
308 static const struct iio_chan_spec fxos8700_channels[] = {
309 FXOS8700_CHANNEL(IIO_ACCEL, X),
310 FXOS8700_CHANNEL(IIO_ACCEL, Y),
311 FXOS8700_CHANNEL(IIO_ACCEL, Z),
312 FXOS8700_CHANNEL(IIO_MAGN, X),
313 FXOS8700_CHANNEL(IIO_MAGN, Y),
314 FXOS8700_CHANNEL(IIO_MAGN, Z),
315 IIO_CHAN_SOFT_TIMESTAMP(FXOS8700_SCAN_TIMESTAMP),
316 };
317
318 static enum fxos8700_sensor fxos8700_to_sensor(enum iio_chan_type iio_type)
319 {
320 switch (iio_type) {
321 case IIO_ACCEL:
322 return FXOS8700_ACCEL;
323 case IIO_ANGL_VEL:
324 return FXOS8700_MAGN;
325 default:
326 return -EINVAL;
327 }
328 }
329
330 static int fxos8700_set_active_mode(struct fxos8700_data *data,
331 enum fxos8700_sensor t, bool mode)
332 {
333 int ret;
334
335 ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, mode);
336 if (ret)
337 return ret;
338
339 usleep_range(FXOS8700_ACTIVE_MIN_USLEEP,
340 FXOS8700_ACTIVE_MIN_USLEEP + 1000);
341
342 return 0;
343 }
344
345 static int fxos8700_set_scale(struct fxos8700_data *data,
346 enum fxos8700_sensor t, int uscale)
347 {
348 int i;
349 static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale);
350 struct device *dev = regmap_get_device(data->regmap);
351
352 if (t == FXOS8700_MAGN) {
353 dev_err(dev, "Magnetometer scale is locked at 1200uT\n");
354 return -EINVAL;
355 }
356
357 for (i = 0; i < scale_num; i++)
358 if (fxos8700_accel_scale[i].uscale == uscale)
359 break;
360
361 if (i == scale_num)
362 return -EINVAL;
363
364 return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG,
365 fxos8700_accel_scale[i].bits);
366 }
367
368 static int fxos8700_get_scale(struct fxos8700_data *data,
369 enum fxos8700_sensor t, int *uscale)
370 {
371 int i, ret, val;
372 static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale);
373
374 if (t == FXOS8700_MAGN) {
375 *uscale = 1200; /* Magnetometer is locked at 1200uT */
376 return 0;
377 }
378
379 ret = regmap_read(data->regmap, FXOS8700_XYZ_DATA_CFG, &val);
380 if (ret)
381 return ret;
382
383 for (i = 0; i < scale_num; i++) {
384 if (fxos8700_accel_scale[i].bits == (val & 0x3)) {
385 *uscale = fxos8700_accel_scale[i].uscale;
386 return 0;
387 }
388 }
389
390 return -EINVAL;
391 }
392
393 static int fxos8700_get_data(struct fxos8700_data *data, int chan_type,
394 int axis, int *val)
395 {
396 u8 base, reg;
397 int ret;
398 enum fxos8700_sensor type = fxos8700_to_sensor(chan_type);
399
400 base = type ? FXOS8700_OUT_X_MSB : FXOS8700_M_OUT_X_MSB;
401
402 /* Block read 6 bytes of device output registers to avoid data loss */
403 ret = regmap_bulk_read(data->regmap, base, data->buf,
404 FXOS8700_DATA_BUF_SIZE);
405 if (ret)
406 return ret;
407
408 /* Convert axis to buffer index */
409 reg = axis - IIO_MOD_X;
410
411 /* Convert to native endianness */
412 *val = sign_extend32(be16_to_cpu(data->buf[reg]), 15);
413
414 return 0;
415 }
416
417 static int fxos8700_set_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
418 int odr, int uodr)
419 {
420 int i, ret, val;
421 bool active_mode;
422 static const int odr_num = ARRAY_SIZE(fxos8700_odr);
423
424 ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val);
425 if (ret)
426 return ret;
427
428 active_mode = val & FXOS8700_ACTIVE;
429
430 if (active_mode) {
431 /*
432 * The device must be in standby mode to change any of the
433 * other fields within CTRL_REG1
434 */
435 ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1,
436 val & ~FXOS8700_ACTIVE);
437 if (ret)
438 return ret;
439 }
440
441 for (i = 0; i < odr_num; i++)
442 if (fxos8700_odr[i].odr == odr && fxos8700_odr[i].uodr == uodr)
443 break;
444
445 if (i >= odr_num)
446 return -EINVAL;
447
448 return regmap_update_bits(data->regmap,
449 FXOS8700_CTRL_REG1,
450 FXOS8700_CTRL_ODR_MSK + FXOS8700_ACTIVE,
451 fxos8700_odr[i].bits << 3 | active_mode);
452 }
453
454 static int fxos8700_get_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
455 int *odr, int *uodr)
456 {
457 int i, val, ret;
458 static const int odr_num = ARRAY_SIZE(fxos8700_odr);
459
460 ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val);
461 if (ret)
462 return ret;
463
464 val &= FXOS8700_CTRL_ODR_MSK;
465
466 for (i = 0; i < odr_num; i++)
467 if (val == fxos8700_odr[i].bits)
468 break;
469
470 if (i >= odr_num)
471 return -EINVAL;
472
473 *odr = fxos8700_odr[i].odr;
474 *uodr = fxos8700_odr[i].uodr;
475
476 return 0;
477 }
478
479 static int fxos8700_read_raw(struct iio_dev *indio_dev,
480 struct iio_chan_spec const *chan,
481 int *val, int *val2, long mask)
482 {
483 int ret;
484 struct fxos8700_data *data = iio_priv(indio_dev);
485
486 switch (mask) {
487 case IIO_CHAN_INFO_RAW:
488 ret = fxos8700_get_data(data, chan->type, chan->channel2, val);
489 if (ret)
490 return ret;
491 return IIO_VAL_INT;
492 case IIO_CHAN_INFO_SCALE:
493 *val = 0;
494 ret = fxos8700_get_scale(data, fxos8700_to_sensor(chan->type),
495 val2);
496 return ret ? ret : IIO_VAL_INT_PLUS_MICRO;
497 case IIO_CHAN_INFO_SAMP_FREQ:
498 ret = fxos8700_get_odr(data, fxos8700_to_sensor(chan->type),
499 val, val2);
500 return ret ? ret : IIO_VAL_INT_PLUS_MICRO;
501 default:
502 return -EINVAL;
503 }
504 }
505
506 static int fxos8700_write_raw(struct iio_dev *indio_dev,
507 struct iio_chan_spec const *chan,
508 int val, int val2, long mask)
509 {
510 struct fxos8700_data *data = iio_priv(indio_dev);
511
512 switch (mask) {
513 case IIO_CHAN_INFO_SCALE:
514 return fxos8700_set_scale(data, fxos8700_to_sensor(chan->type),
515 val2);
516 case IIO_CHAN_INFO_SAMP_FREQ:
517 return fxos8700_set_odr(data, fxos8700_to_sensor(chan->type),
518 val, val2);
519 default:
520 return -EINVAL;
521 }
522 }
523
524 static IIO_CONST_ATTR(in_accel_sampling_frequency_available,
525 "1.5625 6.25 12.5 50 100 200 400 800");
526 static IIO_CONST_ATTR(in_magn_sampling_frequency_available,
527 "1.5625 6.25 12.5 50 100 200 400 800");
528 static IIO_CONST_ATTR(in_accel_scale_available, "0.000244 0.000488 0.000976");
529 static IIO_CONST_ATTR(in_magn_scale_available, "0.000001200");
530
531 static struct attribute *fxos8700_attrs[] = {
532 &iio_const_attr_in_accel_sampling_frequency_available.dev_attr.attr,
533 &iio_const_attr_in_magn_sampling_frequency_available.dev_attr.attr,
534 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
535 &iio_const_attr_in_magn_scale_available.dev_attr.attr,
536 NULL,
537 };
538
539 static const struct attribute_group fxos8700_attrs_group = {
540 .attrs = fxos8700_attrs,
541 };
542
543 static const struct iio_info fxos8700_info = {
544 .read_raw = fxos8700_read_raw,
545 .write_raw = fxos8700_write_raw,
546 .attrs = &fxos8700_attrs_group,
547 };
548
549 static int fxos8700_chip_init(struct fxos8700_data *data, bool use_spi)
550 {
551 int ret;
552 unsigned int val;
553 struct device *dev = regmap_get_device(data->regmap);
554
555 ret = regmap_read(data->regmap, FXOS8700_WHO_AM_I, &val);
556 if (ret) {
557 dev_err(dev, "Error reading chip id\n");
558 return ret;
559 }
560 if (val != FXOS8700_DEVICE_ID && val != FXOS8700_PRE_DEVICE_ID) {
561 dev_err(dev, "Wrong chip id, got %x expected %x or %x\n",
562 val, FXOS8700_DEVICE_ID, FXOS8700_PRE_DEVICE_ID);
563 return -ENODEV;
564 }
565
566 ret = fxos8700_set_active_mode(data, FXOS8700_ACCEL, true);
567 if (ret)
568 return ret;
569
570 ret = fxos8700_set_active_mode(data, FXOS8700_MAGN, true);
571 if (ret)
572 return ret;
573
574 /*
575 * The device must be in standby mode to change any of the other fields
576 * within CTRL_REG1
577 */
578 ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, 0x00);
579 if (ret)
580 return ret;
581
582 /* Set max oversample ratio (OSR) and both devices active */
583 ret = regmap_write(data->regmap, FXOS8700_M_CTRL_REG1,
584 FXOS8700_HMS_MASK | FXOS8700_OS_MASK);
585 if (ret)
586 return ret;
587
588 /* Disable and rst min/max measurements & threshold */
589 ret = regmap_write(data->regmap, FXOS8700_M_CTRL_REG2,
590 FXOS8700_MAXMIN_RST | FXOS8700_MAXMIN_DIS_THS |
591 FXOS8700_MAXMIN_DIS);
592 if (ret)
593 return ret;
594
595 /* Max ODR (800Hz individual or 400Hz hybrid), active mode */
596 ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1,
597 FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE);
598 if (ret)
599 return ret;
600
601 /* Set for max full-scale range (+/-8G) */
602 return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G);
603 }
604
605 static void fxos8700_chip_uninit(void *data)
606 {
607 struct fxos8700_data *fxos8700_data = data;
608
609 fxos8700_set_active_mode(fxos8700_data, FXOS8700_ACCEL, false);
610 fxos8700_set_active_mode(fxos8700_data, FXOS8700_MAGN, false);
611 }
612
613 int fxos8700_core_probe(struct device *dev, struct regmap *regmap,
614 const char *name, bool use_spi)
615 {
616 struct iio_dev *indio_dev;
617 struct fxos8700_data *data;
618 int ret;
619
620 indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
621 if (!indio_dev)
622 return -ENOMEM;
623
624 data = iio_priv(indio_dev);
625 dev_set_drvdata(dev, indio_dev);
626 data->regmap = regmap;
627
628 ret = fxos8700_chip_init(data, use_spi);
629 if (ret)
630 return ret;
631
632 ret = devm_add_action_or_reset(dev, fxos8700_chip_uninit, data);
633 if (ret)
634 return ret;
635
636 indio_dev->channels = fxos8700_channels;
637 indio_dev->num_channels = ARRAY_SIZE(fxos8700_channels);
638 indio_dev->name = name ? name : "fxos8700";
639 indio_dev->modes = INDIO_DIRECT_MODE;
640 indio_dev->info = &fxos8700_info;
641
642 return devm_iio_device_register(dev, indio_dev);
643 }
644 EXPORT_SYMBOL_GPL(fxos8700_core_probe);
645
646 MODULE_AUTHOR("Robert Jones <rjones@gateworks.com>");
647 MODULE_DESCRIPTION("FXOS8700 6-Axis Acc and Mag Combo Sensor driver");
648 MODULE_LICENSE("GPL v2");
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