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Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / drivers / iio / pressure / st_pressure_core.c
CommitLineData
217494e5
DC		 1/*
2 * STMicroelectronics pressures driver
3 *
4 * Copyright 2013 STMicroelectronics Inc.
5 *
6 * Denis Ciocca <denis.ciocca@st.com>
7 *
8 * Licensed under the GPL-2.
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/errno.h>
15#include <linux/types.h>
16#include <linux/mutex.h>
17#include <linux/interrupt.h>
18#include <linux/i2c.h>
19#include <linux/gpio.h>
20#include <linux/irq.h>
21#include <linux/delay.h>
22#include <linux/iio/iio.h>
23#include <linux/iio/sysfs.h>
24#include <linux/iio/trigger.h>
25#include <linux/iio/buffer.h>
26#include <asm/unaligned.h>
27
28#include <linux/iio/common/st_sensors.h>
29#include "st_pressure.h"
30
19b7b8a8
GB		 31/*
32 * About determining pressure scaling factors
33 * ------------------------------------------
34 *
35 * Datasheets specify typical pressure sensitivity so that pressure is computed
36 * according to the following equation :
37 * pressure[mBar] = raw / sensitivity
38 * where :
39 * raw the 24 bits long raw sampled pressure
40 * sensitivity a scaling factor specified by the datasheet in LSB/mBar
41 *
42 * IIO ABI expects pressure to be expressed as kPascal, hence pressure should be
43 * computed according to :
44 * pressure[kPascal] = pressure[mBar] / 10
45 * = raw / (sensitivity * 10) (1)
46 *
47 * Finally, st_press_read_raw() returns pressure scaling factor as an
48 * IIO_VAL_INT_PLUS_NANO with a zero integral part and "gain" as decimal part.
49 * Therefore, from (1), "gain" becomes :
50 * gain = 10^9 / (sensitivity * 10)
51 * = 10^8 / sensitivity
52 *
53 * About determining temperature scaling factors and offsets
54 * ---------------------------------------------------------
55 *
56 * Datasheets specify typical temperature sensitivity and offset so that
57 * temperature is computed according to the following equation :
58 * temp[Celsius] = offset[Celsius] + (raw / sensitivity)
59 * where :
60 * raw the 16 bits long raw sampled temperature
61 * offset a constant specified by the datasheet in degree Celsius
62 * (sometimes zero)
63 * sensitivity a scaling factor specified by the datasheet in LSB/Celsius
64 *
65 * IIO ABI expects temperature to be expressed as milli degree Celsius such as
66 * user space should compute temperature according to :
67 * temp[mCelsius] = temp[Celsius] * 10^3
68 * = (offset[Celsius] + (raw / sensitivity)) * 10^3
69 * = ((offset[Celsius] * sensitivity) + raw) *
70 * (10^3 / sensitivity) (2)
71 *
72 * IIO ABI expects user space to apply offset and scaling factors to raw samples
73 * according to :
74 * temp[mCelsius] = (OFFSET + raw) * SCALE
75 * where :
76 * OFFSET an arbitrary constant exposed by device
77 * SCALE an arbitrary scaling factor exposed by device
78 *
79 * Matching OFFSET and SCALE with members of (2) gives :
80 * OFFSET = offset[Celsius] * sensitivity (3)
81 * SCALE = 10^3 / sensitivity (4)
82 *
83 * st_press_read_raw() returns temperature scaling factor as an
84 * IIO_VAL_FRACTIONAL with a 10^3 numerator and "gain2" as denominator.
85 * Therefore, from (3), "gain2" becomes :
86 * gain2 = sensitivity
87 *
88 * When declared within channel, i.e. for a non zero specified offset,
89 * st_press_read_raw() will return the latter as an IIO_VAL_FRACTIONAL such as :
90 * numerator = OFFSET * 10^3
91 * denominator = 10^3
92 * giving from (4):
93 * numerator = offset[Celsius] * 10^3 * sensitivity
94 * = offset[mCelsius] * gain2
95 */
96
d43a4115
GB		 97#define MCELSIUS_PER_CELSIUS 1000
98
99/* Default pressure sensitivity */
67dbf54a
JA		 100#define ST_PRESS_LSB_PER_MBAR 4096UL
101#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
102 ST_PRESS_LSB_PER_MBAR)
d43a4115
GB		 103
104/* Default temperature sensitivity */
1003eb67 105#define ST_PRESS_LSB_PER_CELSIUS 480UL
d43a4115
GB		 106#define ST_PRESS_MILLI_CELSIUS_OFFSET 42500UL
107
217494e5 108/* FULLSCALE */
d43a4115 109#define ST_PRESS_FS_AVL_1100MB 1100
217494e5
DC		 110#define ST_PRESS_FS_AVL_1260MB 1260
111
93187840
DC		 112#define ST_PRESS_1_OUT_XL_ADDR 0x28
113#define ST_TEMP_1_OUT_L_ADDR 0x2b
114
19b7b8a8
GB		 115/*
116 * CUSTOM VALUES FOR LPS331AP SENSOR
117 * See LPS331AP datasheet:
118 * http://www2.st.com/resource/en/datasheet/lps331ap.pdf
119 */
302fbd50
LJ		 120#define ST_PRESS_LPS331AP_WAI_EXP 0xbb
121#define ST_PRESS_LPS331AP_ODR_ADDR 0x20
122#define ST_PRESS_LPS331AP_ODR_MASK 0x70
123#define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01
124#define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05
125#define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06
126#define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07
127#define ST_PRESS_LPS331AP_PW_ADDR 0x20
128#define ST_PRESS_LPS331AP_PW_MASK 0x80
129#define ST_PRESS_LPS331AP_FS_ADDR 0x23
130#define ST_PRESS_LPS331AP_FS_MASK 0x30
302fbd50
LJ		 131#define ST_PRESS_LPS331AP_BDU_ADDR 0x20
132#define ST_PRESS_LPS331AP_BDU_MASK 0x04
133#define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22
134#define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04
135#define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20
a9fd053b
LW		 136#define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22
137#define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80
0e6f6871
LW		 138#define ST_PRESS_LPS331AP_OD_IRQ_ADDR 0x22
139#define ST_PRESS_LPS331AP_OD_IRQ_MASK 0x40
302fbd50 140#define ST_PRESS_LPS331AP_MULTIREAD_BIT true
217494e5 141
19b7b8a8
GB		 142/*
143 * CUSTOM VALUES FOR THE OBSOLETE LPS001WP SENSOR
144 */
d43a4115
GB		 145
146/* LPS001WP pressure resolution */
147#define ST_PRESS_LPS001WP_LSB_PER_MBAR 16UL
148/* LPS001WP temperature resolution */
149#define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64UL
150
7885a8ce
LJ		 151#define ST_PRESS_LPS001WP_WAI_EXP 0xba
152#define ST_PRESS_LPS001WP_ODR_ADDR 0x20
153#define ST_PRESS_LPS001WP_ODR_MASK 0x30
154#define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
155#define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
156#define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
157#define ST_PRESS_LPS001WP_PW_ADDR 0x20
158#define ST_PRESS_LPS001WP_PW_MASK 0x40
d43a4115
GB		 159#define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \
160 (100000000UL / ST_PRESS_LPS001WP_LSB_PER_MBAR)
7885a8ce
LJ		 161#define ST_PRESS_LPS001WP_BDU_ADDR 0x20
162#define ST_PRESS_LPS001WP_BDU_MASK 0x04
163#define ST_PRESS_LPS001WP_MULTIREAD_BIT true
164#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
165#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
166
19b7b8a8
GB		 167/*
168 * CUSTOM VALUES FOR LPS25H SENSOR
169 * See LPS25H datasheet:
170 * http://www2.st.com/resource/en/datasheet/lps25h.pdf
171 */
93187840
DC		 172#define ST_PRESS_LPS25H_WAI_EXP 0xbd
173#define ST_PRESS_LPS25H_ODR_ADDR 0x20
174#define ST_PRESS_LPS25H_ODR_MASK 0x70
175#define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
176#define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
177#define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
178#define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
179#define ST_PRESS_LPS25H_PW_ADDR 0x20
180#define ST_PRESS_LPS25H_PW_MASK 0x80
93187840
DC		 181#define ST_PRESS_LPS25H_BDU_ADDR 0x20
182#define ST_PRESS_LPS25H_BDU_MASK 0x04
183#define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
184#define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
185#define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
a9fd053b
LW		 186#define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22
187#define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80
0e6f6871
LW		 188#define ST_PRESS_LPS25H_OD_IRQ_ADDR 0x22
189#define ST_PRESS_LPS25H_OD_IRQ_MASK 0x40
93187840 190#define ST_PRESS_LPS25H_MULTIREAD_BIT true
93187840
DC		 191#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
192#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
193
19b7b8a8
GB		 194/*
195 * CUSTOM VALUES FOR LPS22HB SENSOR
196 * See LPS22HB datasheet:
197 * http://www2.st.com/resource/en/datasheet/lps22hb.pdf
198 */
85d79136
GB		 199
200/* LPS22HB temperature sensitivity */
201#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL
202
e039e2f5
GB		 203#define ST_PRESS_LPS22HB_WAI_EXP 0xb1
204#define ST_PRESS_LPS22HB_ODR_ADDR 0x10
205#define ST_PRESS_LPS22HB_ODR_MASK 0x70
206#define ST_PRESS_LPS22HB_ODR_AVL_1HZ_VAL 0x01
207#define ST_PRESS_LPS22HB_ODR_AVL_10HZ_VAL 0x02
208#define ST_PRESS_LPS22HB_ODR_AVL_25HZ_VAL 0x03
209#define ST_PRESS_LPS22HB_ODR_AVL_50HZ_VAL 0x04
210#define ST_PRESS_LPS22HB_ODR_AVL_75HZ_VAL 0x05
211#define ST_PRESS_LPS22HB_PW_ADDR 0x10
212#define ST_PRESS_LPS22HB_PW_MASK 0x70
213#define ST_PRESS_LPS22HB_BDU_ADDR 0x10
214#define ST_PRESS_LPS22HB_BDU_MASK 0x02
215#define ST_PRESS_LPS22HB_DRDY_IRQ_ADDR 0x12
216#define ST_PRESS_LPS22HB_DRDY_IRQ_INT1_MASK 0x04
217#define ST_PRESS_LPS22HB_DRDY_IRQ_INT2_MASK 0x08
218#define ST_PRESS_LPS22HB_IHL_IRQ_ADDR 0x12
219#define ST_PRESS_LPS22HB_IHL_IRQ_MASK 0x80
05167cdc
GB		 220#define ST_PRESS_LPS22HB_OD_IRQ_ADDR 0x12
221#define ST_PRESS_LPS22HB_OD_IRQ_MASK 0x40
e039e2f5
GB		 222#define ST_PRESS_LPS22HB_MULTIREAD_BIT true
223
93187840 224static const struct iio_chan_spec st_press_1_channels[] = {
2f5effcb
LJ		 225 {
226 .type = IIO_PRESSURE,
93187840 227 .address = ST_PRESS_1_OUT_XL_ADDR,
b4701fd6 228 .scan_index = 0,
2f5effcb
LJ		 229 .scan_type = {
230 .sign = 'u',
231 .realbits = 24,
c9d5e5b9 232 .storagebits = 32,
2f5effcb
LJ		 233 .endianness = IIO_LE,
234 },
235 .info_mask_separate =
217494e5 236 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
2f5effcb
LJ		 237 },
238 {
239 .type = IIO_TEMP,
93187840 240 .address = ST_TEMP_1_OUT_L_ADDR,
b4701fd6 241 .scan_index = 1,
2f5effcb
LJ		 242 .scan_type = {
243 .sign = 'u',
244 .realbits = 16,
245 .storagebits = 16,
246 .endianness = IIO_LE,
247 },
248 .info_mask_separate =
249 BIT(IIO_CHAN_INFO_RAW) |
250 BIT(IIO_CHAN_INFO_SCALE) |
251 BIT(IIO_CHAN_INFO_OFFSET),
2f5effcb 252 },
b4701fd6 253 IIO_CHAN_SOFT_TIMESTAMP(2)
217494e5
DC		 254};
255
7885a8ce
LJ		 256static const struct iio_chan_spec st_press_lps001wp_channels[] = {
257 {
258 .type = IIO_PRESSURE,
7885a8ce 259 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
b4701fd6 260 .scan_index = 0,
7885a8ce
LJ		 261 .scan_type = {
262 .sign = 'u',
263 .realbits = 16,
264 .storagebits = 16,
265 .endianness = IIO_LE,
266 },
d43a4115
GB		 267 .info_mask_separate =
268 BIT(IIO_CHAN_INFO_RAW) |
269 BIT(IIO_CHAN_INFO_SCALE),
7885a8ce
LJ		 270 },
271 {
272 .type = IIO_TEMP,
7885a8ce 273 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
b4701fd6 274 .scan_index = 1,
7885a8ce
LJ		 275 .scan_type = {
276 .sign = 'u',
277 .realbits = 16,
278 .storagebits = 16,
279 .endianness = IIO_LE,
280 },
281 .info_mask_separate =
282 BIT(IIO_CHAN_INFO_RAW) |
d43a4115 283 BIT(IIO_CHAN_INFO_SCALE),
7885a8ce 284 },
b4701fd6 285 IIO_CHAN_SOFT_TIMESTAMP(2)
7885a8ce
LJ		 286};
287
e039e2f5
GB		 288static const struct iio_chan_spec st_press_lps22hb_channels[] = {
289 {
290 .type = IIO_PRESSURE,
e039e2f5
GB		 291 .address = ST_PRESS_1_OUT_XL_ADDR,
292 .scan_index = 0,
293 .scan_type = {
294 .sign = 'u',
295 .realbits = 24,
c9d5e5b9 296 .storagebits = 32,
e039e2f5
GB		 297 .endianness = IIO_LE,
298 },
299 .info_mask_separate =
300 BIT(IIO_CHAN_INFO_RAW) |
301 BIT(IIO_CHAN_INFO_SCALE),
302 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
e039e2f5 303 },
85d79136
GB		 304 {
305 .type = IIO_TEMP,
306 .address = ST_TEMP_1_OUT_L_ADDR,
307 .scan_index = 1,
308 .scan_type = {
309 .sign = 's',
310 .realbits = 16,
311 .storagebits = 16,
312 .endianness = IIO_LE,
313 },
314 .info_mask_separate =
315 BIT(IIO_CHAN_INFO_RAW) |
316 BIT(IIO_CHAN_INFO_SCALE),
317 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
318 },
319 IIO_CHAN_SOFT_TIMESTAMP(2)
e039e2f5
GB		 320};
321
a7ee8839 322static const struct st_sensor_settings st_press_sensors_settings[] = {
217494e5 323 {
302fbd50 324 .wai = ST_PRESS_LPS331AP_WAI_EXP,
bc27381e 325 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
217494e5
DC		 326 .sensors_supported = {
327 [0] = LPS331AP_PRESS_DEV_NAME,
328 },
93187840
DC		 329 .ch = (struct iio_chan_spec *)st_press_1_channels,
330 .num_ch = ARRAY_SIZE(st_press_1_channels),
217494e5 331 .odr = {
302fbd50
LJ		 332 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
333 .mask = ST_PRESS_LPS331AP_ODR_MASK,
217494e5 334 .odr_avl = {
302fbd50
LJ		 335 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
336 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
337 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
338 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
217494e5
DC		 339 },
340 },
341 .pw = {
302fbd50
LJ		 342 .addr = ST_PRESS_LPS331AP_PW_ADDR,
343 .mask = ST_PRESS_LPS331AP_PW_MASK,
217494e5
DC		 344 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
345 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
346 },
347 .fs = {
302fbd50
LJ		 348 .addr = ST_PRESS_LPS331AP_FS_ADDR,
349 .mask = ST_PRESS_LPS331AP_FS_MASK,
217494e5 350 .fs_avl = {
d43a4115
GB		 351 /*
352 * Pressure and temperature sensitivity values
353 * as defined in table 3 of LPS331AP datasheet.
354 */
217494e5
DC		 355 [0] = {
356 .num = ST_PRESS_FS_AVL_1260MB,
d43a4115
GB		 357 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
358 .gain2 = ST_PRESS_LSB_PER_CELSIUS,
217494e5
DC		 359 },
360 },
361 },
362 .bdu = {
302fbd50
LJ		 363 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
364 .mask = ST_PRESS_LPS331AP_BDU_MASK,
217494e5
DC		 365 },
366 .drdy_irq = {
302fbd50
LJ		 367 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
368 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
369 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
a9fd053b
LW		 370 .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR,
371 .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK,
0e6f6871
LW		 372 .addr_od = ST_PRESS_LPS331AP_OD_IRQ_ADDR,
373 .mask_od = ST_PRESS_LPS331AP_OD_IRQ_MASK,
97865fe4 374 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
217494e5 375 },
302fbd50 376 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
217494e5
DC		 377 .bootime = 2,
378 },
7885a8ce
LJ		 379 {
380 .wai = ST_PRESS_LPS001WP_WAI_EXP,
bc27381e 381 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
7885a8ce
LJ		 382 .sensors_supported = {
383 [0] = LPS001WP_PRESS_DEV_NAME,
384 },
385 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
386 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
387 .odr = {
388 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
389 .mask = ST_PRESS_LPS001WP_ODR_MASK,
390 .odr_avl = {
391 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
392 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
393 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
394 },
395 },
396 .pw = {
397 .addr = ST_PRESS_LPS001WP_PW_ADDR,
398 .mask = ST_PRESS_LPS001WP_PW_MASK,
399 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
400 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
401 },
402 .fs = {
d43a4115
GB		 403 .fs_avl = {
404 /*
405 * Pressure and temperature resolution values
406 * as defined in table 3 of LPS001WP datasheet.
407 */
408 [0] = {
409 .num = ST_PRESS_FS_AVL_1100MB,
410 .gain = ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN,
411 .gain2 = ST_PRESS_LPS001WP_LSB_PER_CELSIUS,
412 },
413 },
7885a8ce
LJ		 414 },
415 .bdu = {
416 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
417 .mask = ST_PRESS_LPS001WP_BDU_MASK,
418 },
419 .drdy_irq = {
420 .addr = 0,
421 },
422 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
423 .bootime = 2,
424 },
93187840
DC		 425 {
426 .wai = ST_PRESS_LPS25H_WAI_EXP,
bc27381e 427 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
93187840
DC		 428 .sensors_supported = {
429 [0] = LPS25H_PRESS_DEV_NAME,
430 },
431 .ch = (struct iio_chan_spec *)st_press_1_channels,
432 .num_ch = ARRAY_SIZE(st_press_1_channels),
433 .odr = {
434 .addr = ST_PRESS_LPS25H_ODR_ADDR,
435 .mask = ST_PRESS_LPS25H_ODR_MASK,
436 .odr_avl = {
437 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
438 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
439 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
440 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
441 },
442 },
443 .pw = {
444 .addr = ST_PRESS_LPS25H_PW_ADDR,
445 .mask = ST_PRESS_LPS25H_PW_MASK,
446 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
447 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
448 },
449 .fs = {
93187840 450 .fs_avl = {
d43a4115
GB		 451 /*
452 * Pressure and temperature sensitivity values
453 * as defined in table 3 of LPS25H datasheet.
454 */
93187840
DC		 455 [0] = {
456 .num = ST_PRESS_FS_AVL_1260MB,
d43a4115
GB		 457 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
458 .gain2 = ST_PRESS_LSB_PER_CELSIUS,
93187840
DC		 459 },
460 },
461 },
462 .bdu = {
463 .addr = ST_PRESS_LPS25H_BDU_ADDR,
464 .mask = ST_PRESS_LPS25H_BDU_MASK,
465 },
466 .drdy_irq = {
467 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
468 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
469 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
a9fd053b
LW		 470 .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR,
471 .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK,
0e6f6871
LW		 472 .addr_od = ST_PRESS_LPS25H_OD_IRQ_ADDR,
473 .mask_od = ST_PRESS_LPS25H_OD_IRQ_MASK,
97865fe4 474 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
93187840
DC		 475 },
476 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
477 .bootime = 2,
478 },
e039e2f5
GB		 479 {
480 .wai = ST_PRESS_LPS22HB_WAI_EXP,
481 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
482 .sensors_supported = {
483 [0] = LPS22HB_PRESS_DEV_NAME,
484 },
485 .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
486 .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
487 .odr = {
488 .addr = ST_PRESS_LPS22HB_ODR_ADDR,
489 .mask = ST_PRESS_LPS22HB_ODR_MASK,
490 .odr_avl = {
491 { 1, ST_PRESS_LPS22HB_ODR_AVL_1HZ_VAL, },
492 { 10, ST_PRESS_LPS22HB_ODR_AVL_10HZ_VAL, },
493 { 25, ST_PRESS_LPS22HB_ODR_AVL_25HZ_VAL, },
494 { 50, ST_PRESS_LPS22HB_ODR_AVL_50HZ_VAL, },
495 { 75, ST_PRESS_LPS22HB_ODR_AVL_75HZ_VAL, },
496 },
497 },
498 .pw = {
499 .addr = ST_PRESS_LPS22HB_PW_ADDR,
500 .mask = ST_PRESS_LPS22HB_PW_MASK,
501 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
502 },
503 .fs = {
504 .fs_avl = {
19b7b8a8 505 /*
85d79136
GB		 506 * Pressure and temperature sensitivity values
507 * as defined in table 3 of LPS22HB datasheet.
19b7b8a8 508 */
e039e2f5
GB		 509 [0] = {
510 .num = ST_PRESS_FS_AVL_1260MB,
511 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
85d79136 512 .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
e039e2f5
GB		 513 },
514 },
515 },
516 .bdu = {
517 .addr = ST_PRESS_LPS22HB_BDU_ADDR,
518 .mask = ST_PRESS_LPS22HB_BDU_MASK,
519 },
520 .drdy_irq = {
521 .addr = ST_PRESS_LPS22HB_DRDY_IRQ_ADDR,
522 .mask_int1 = ST_PRESS_LPS22HB_DRDY_IRQ_INT1_MASK,
523 .mask_int2 = ST_PRESS_LPS22HB_DRDY_IRQ_INT2_MASK,
524 .addr_ihl = ST_PRESS_LPS22HB_IHL_IRQ_ADDR,
525 .mask_ihl = ST_PRESS_LPS22HB_IHL_IRQ_MASK,
05167cdc
GB		 526 .addr_od = ST_PRESS_LPS22HB_OD_IRQ_ADDR,
527 .mask_od = ST_PRESS_LPS22HB_OD_IRQ_MASK,
528 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
e039e2f5
GB		 529 },
530 .multi_read_bit = ST_PRESS_LPS22HB_MULTIREAD_BIT,
531 },
217494e5
DC		 532};
533
2d239c9e
JC		 534static int st_press_write_raw(struct iio_dev *indio_dev,
535 struct iio_chan_spec const *ch,
536 int val,
537 int val2,
538 long mask)
539{
540 int err;
541
542 switch (mask) {
543 case IIO_CHAN_INFO_SAMP_FREQ:
544 if (val2)
545 return -EINVAL;
546 mutex_lock(&indio_dev->mlock);
547 err = st_sensors_set_odr(indio_dev, val);
548 mutex_unlock(&indio_dev->mlock);
549 return err;
550 default:
551 return -EINVAL;
552 }
553}
554
217494e5
DC		 555static int st_press_read_raw(struct iio_dev *indio_dev,
556 struct iio_chan_spec const *ch, int *val,
557 int *val2, long mask)
558{
559 int err;
a1dcf429 560 struct st_sensor_data *press_data = iio_priv(indio_dev);
217494e5
DC		 561
562 switch (mask) {
563 case IIO_CHAN_INFO_RAW:
564 err = st_sensors_read_info_raw(indio_dev, ch, val);
565 if (err < 0)
566 goto read_error;
567
568 return IIO_VAL_INT;
569 case IIO_CHAN_INFO_SCALE:
217494e5
DC		 570 switch (ch->type) {
571 case IIO_PRESSURE:
d43a4115 572 *val = 0;
a1dcf429 573 *val2 = press_data->current_fullscale->gain;
d43a4115 574 return IIO_VAL_INT_PLUS_NANO;
217494e5 575 case IIO_TEMP:
d43a4115 576 *val = MCELSIUS_PER_CELSIUS;
a1dcf429 577 *val2 = press_data->current_fullscale->gain2;
d43a4115 578 return IIO_VAL_FRACTIONAL;
217494e5
DC		 579 default:
580 err = -EINVAL;
581 goto read_error;
582 }
583
217494e5
DC		 584 case IIO_CHAN_INFO_OFFSET:
585 switch (ch->type) {
586 case IIO_TEMP:
d43a4115
GB		 587 *val = ST_PRESS_MILLI_CELSIUS_OFFSET *
588 press_data->current_fullscale->gain2;
589 *val2 = MCELSIUS_PER_CELSIUS;
217494e5
DC		 590 break;
591 default:
592 err = -EINVAL;
593 goto read_error;
594 }
595
596 return IIO_VAL_FRACTIONAL;
2d239c9e 597 case IIO_CHAN_INFO_SAMP_FREQ:
a1dcf429 598 *val = press_data->odr;
2d239c9e 599 return IIO_VAL_INT;
217494e5
DC		 600 default:
601 return -EINVAL;
602 }
603
604read_error:
605 return err;
606}
607
217494e5
DC		 608static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
609
610static struct attribute *st_press_attributes[] = {
611 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
217494e5
DC		 612 NULL,
613};
614
615static const struct attribute_group st_press_attribute_group = {
616 .attrs = st_press_attributes,
617};
618
619static const struct iio_info press_info = {
620 .driver_module = THIS_MODULE,
621 .attrs = &st_press_attribute_group,
622 .read_raw = &st_press_read_raw,
2d239c9e 623 .write_raw = &st_press_write_raw,
a0175b9c 624 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
217494e5
DC		 625};
626
627#ifdef CONFIG_IIO_TRIGGER
628static const struct iio_trigger_ops st_press_trigger_ops = {
629 .owner = THIS_MODULE,
630 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
65925b65 631 .validate_device = st_sensors_validate_device,
217494e5
DC		 632};
633#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
634#else
635#define ST_PRESS_TRIGGER_OPS NULL
636#endif
637
0baa3fc1 638int st_press_common_probe(struct iio_dev *indio_dev)
217494e5 639{
a1dcf429
DC		 640 struct st_sensor_data *press_data = iio_priv(indio_dev);
641 int irq = press_data->get_irq_data_ready(indio_dev);
a6cc5b25 642 int err;
217494e5
DC		 643
644 indio_dev->modes = INDIO_DIRECT_MODE;
645 indio_dev->info = &press_info;
8e71c04f 646 mutex_init(&press_data->tb.buf_lock);
217494e5 647
14f295c8
GB		 648 err = st_sensors_power_enable(indio_dev);
649 if (err)
650 return err;
77448761 651
217494e5 652 err = st_sensors_check_device_support(indio_dev,
a7ee8839
DC		 653 ARRAY_SIZE(st_press_sensors_settings),
654 st_press_sensors_settings);
217494e5 655 if (err < 0)
14f295c8 656 goto st_press_power_off;
217494e5 657
b4701fd6
GB		 658 /*
659 * Skip timestamping channel while declaring available channels to
660 * common st_sensor layer. Look at st_sensors_get_buffer_element() to
661 * see how timestamps are explicitly pushed as last samples block
662 * element.
663 */
664 press_data->num_data_channels = press_data->sensor_settings->num_ch - 1;
a1dcf429
DC		 665 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
666 indio_dev->channels = press_data->sensor_settings->ch;
667 indio_dev->num_channels = press_data->sensor_settings->num_ch;
217494e5 668
e039e2f5
GB		 669 press_data->current_fullscale =
670 (struct st_sensor_fullscale_avl *)
671 &press_data->sensor_settings->fs.fs_avl[0];
362f2f86 672
a1dcf429 673 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
217494e5 674
38d1c6a9 675 /* Some devices don't support a data ready pin. */
a1dcf429
DC		 676 if (!press_data->dev->platform_data &&
677 press_data->sensor_settings->drdy_irq.addr)
678 press_data->dev->platform_data =
23cde4d6
DC		 679 (struct st_sensors_platform_data *)&default_press_pdata;
680
a1dcf429 681 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
217494e5 682 if (err < 0)
14f295c8 683 goto st_press_power_off;
217494e5 684
7a137c9c
DC		 685 err = st_press_allocate_ring(indio_dev);
686 if (err < 0)
14f295c8 687 goto st_press_power_off;
217494e5 688
7a137c9c 689 if (irq > 0) {
217494e5 690 err = st_sensors_allocate_trigger(indio_dev,
a6cc5b25 691 ST_PRESS_TRIGGER_OPS);
217494e5
DC		 692 if (err < 0)
693 goto st_press_probe_trigger_error;
694 }
695
696 err = iio_device_register(indio_dev);
697 if (err)
698 goto st_press_device_register_error;
699
4f544ced
LW		 700 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
701 indio_dev->name);
702
217494e5
DC		 703 return err;
704
705st_press_device_register_error:
a6cc5b25 706 if (irq > 0)
217494e5
DC		 707 st_sensors_deallocate_trigger(indio_dev);
708st_press_probe_trigger_error:
7a137c9c 709 st_press_deallocate_ring(indio_dev);
14f295c8
GB		 710st_press_power_off:
711 st_sensors_power_disable(indio_dev);
a6cc5b25 712
217494e5
DC		 713 return err;
714}
715EXPORT_SYMBOL(st_press_common_probe);
716
717void st_press_common_remove(struct iio_dev *indio_dev)
718{
a1dcf429 719 struct st_sensor_data *press_data = iio_priv(indio_dev);
217494e5 720
ea7e586b 721 st_sensors_power_disable(indio_dev);
77448761 722
217494e5 723 iio_device_unregister(indio_dev);
a1dcf429 724 if (press_data->get_irq_data_ready(indio_dev) > 0)
217494e5 725 st_sensors_deallocate_trigger(indio_dev);
7a137c9c
DC		 726
727 st_press_deallocate_ring(indio_dev);
217494e5
DC		 728}
729EXPORT_SYMBOL(st_press_common_remove);
730
731MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
732MODULE_DESCRIPTION("STMicroelectronics pressures driver");
733MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)