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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 | ||
67dbf54a JA |
31 | #define ST_PRESS_LSB_PER_MBAR 4096UL |
32 | #define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \ | |
33 | ST_PRESS_LSB_PER_MBAR) | |
1003eb67 JA |
34 | #define ST_PRESS_LSB_PER_CELSIUS 480UL |
35 | #define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \ | |
36 | ST_PRESS_LSB_PER_CELSIUS) | |
217494e5 DC |
37 | #define ST_PRESS_NUMBER_DATA_CHANNELS 1 |
38 | ||
217494e5 DC |
39 | /* FULLSCALE */ |
40 | #define ST_PRESS_FS_AVL_1260MB 1260 | |
41 | ||
93187840 DC |
42 | #define ST_PRESS_1_OUT_XL_ADDR 0x28 |
43 | #define ST_TEMP_1_OUT_L_ADDR 0x2b | |
44 | ||
302fbd50 LJ |
45 | /* CUSTOM VALUES FOR LPS331AP SENSOR */ |
46 | #define ST_PRESS_LPS331AP_WAI_EXP 0xbb | |
47 | #define ST_PRESS_LPS331AP_ODR_ADDR 0x20 | |
48 | #define ST_PRESS_LPS331AP_ODR_MASK 0x70 | |
49 | #define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01 | |
50 | #define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05 | |
51 | #define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06 | |
52 | #define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07 | |
53 | #define ST_PRESS_LPS331AP_PW_ADDR 0x20 | |
54 | #define ST_PRESS_LPS331AP_PW_MASK 0x80 | |
55 | #define ST_PRESS_LPS331AP_FS_ADDR 0x23 | |
56 | #define ST_PRESS_LPS331AP_FS_MASK 0x30 | |
57 | #define ST_PRESS_LPS331AP_FS_AVL_1260_VAL 0x00 | |
58 | #define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE | |
59 | #define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE | |
60 | #define ST_PRESS_LPS331AP_BDU_ADDR 0x20 | |
61 | #define ST_PRESS_LPS331AP_BDU_MASK 0x04 | |
62 | #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22 | |
63 | #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04 | |
64 | #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20 | |
a9fd053b LW |
65 | #define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22 |
66 | #define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80 | |
302fbd50 LJ |
67 | #define ST_PRESS_LPS331AP_MULTIREAD_BIT true |
68 | #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500 | |
217494e5 | 69 | |
7885a8ce LJ |
70 | /* CUSTOM VALUES FOR LPS001WP SENSOR */ |
71 | #define ST_PRESS_LPS001WP_WAI_EXP 0xba | |
72 | #define ST_PRESS_LPS001WP_ODR_ADDR 0x20 | |
73 | #define ST_PRESS_LPS001WP_ODR_MASK 0x30 | |
74 | #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01 | |
75 | #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02 | |
76 | #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03 | |
77 | #define ST_PRESS_LPS001WP_PW_ADDR 0x20 | |
78 | #define ST_PRESS_LPS001WP_PW_MASK 0x40 | |
79 | #define ST_PRESS_LPS001WP_BDU_ADDR 0x20 | |
80 | #define ST_PRESS_LPS001WP_BDU_MASK 0x04 | |
81 | #define ST_PRESS_LPS001WP_MULTIREAD_BIT true | |
82 | #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28 | |
83 | #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a | |
84 | ||
93187840 DC |
85 | /* CUSTOM VALUES FOR LPS25H SENSOR */ |
86 | #define ST_PRESS_LPS25H_WAI_EXP 0xbd | |
87 | #define ST_PRESS_LPS25H_ODR_ADDR 0x20 | |
88 | #define ST_PRESS_LPS25H_ODR_MASK 0x70 | |
89 | #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01 | |
90 | #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02 | |
91 | #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03 | |
92 | #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04 | |
93 | #define ST_PRESS_LPS25H_PW_ADDR 0x20 | |
94 | #define ST_PRESS_LPS25H_PW_MASK 0x80 | |
95 | #define ST_PRESS_LPS25H_FS_ADDR 0x00 | |
96 | #define ST_PRESS_LPS25H_FS_MASK 0x00 | |
97 | #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00 | |
98 | #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE | |
99 | #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE | |
100 | #define ST_PRESS_LPS25H_BDU_ADDR 0x20 | |
101 | #define ST_PRESS_LPS25H_BDU_MASK 0x04 | |
102 | #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23 | |
103 | #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01 | |
104 | #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10 | |
a9fd053b LW |
105 | #define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22 |
106 | #define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80 | |
93187840 DC |
107 | #define ST_PRESS_LPS25H_MULTIREAD_BIT true |
108 | #define ST_PRESS_LPS25H_TEMP_OFFSET 42500 | |
109 | #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28 | |
110 | #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b | |
111 | ||
112 | static const struct iio_chan_spec st_press_1_channels[] = { | |
2f5effcb LJ |
113 | { |
114 | .type = IIO_PRESSURE, | |
115 | .channel2 = IIO_NO_MOD, | |
93187840 | 116 | .address = ST_PRESS_1_OUT_XL_ADDR, |
2f5effcb LJ |
117 | .scan_index = ST_SENSORS_SCAN_X, |
118 | .scan_type = { | |
119 | .sign = 'u', | |
120 | .realbits = 24, | |
121 | .storagebits = 24, | |
122 | .endianness = IIO_LE, | |
123 | }, | |
124 | .info_mask_separate = | |
217494e5 | 125 | BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
2f5effcb LJ |
126 | .modified = 0, |
127 | }, | |
128 | { | |
129 | .type = IIO_TEMP, | |
130 | .channel2 = IIO_NO_MOD, | |
93187840 | 131 | .address = ST_TEMP_1_OUT_L_ADDR, |
2f5effcb LJ |
132 | .scan_index = -1, |
133 | .scan_type = { | |
134 | .sign = 'u', | |
135 | .realbits = 16, | |
136 | .storagebits = 16, | |
137 | .endianness = IIO_LE, | |
138 | }, | |
139 | .info_mask_separate = | |
140 | BIT(IIO_CHAN_INFO_RAW) | | |
141 | BIT(IIO_CHAN_INFO_SCALE) | | |
142 | BIT(IIO_CHAN_INFO_OFFSET), | |
143 | .modified = 0, | |
144 | }, | |
217494e5 DC |
145 | IIO_CHAN_SOFT_TIMESTAMP(1) |
146 | }; | |
147 | ||
7885a8ce LJ |
148 | static const struct iio_chan_spec st_press_lps001wp_channels[] = { |
149 | { | |
150 | .type = IIO_PRESSURE, | |
151 | .channel2 = IIO_NO_MOD, | |
152 | .address = ST_PRESS_LPS001WP_OUT_L_ADDR, | |
153 | .scan_index = ST_SENSORS_SCAN_X, | |
154 | .scan_type = { | |
155 | .sign = 'u', | |
156 | .realbits = 16, | |
157 | .storagebits = 16, | |
158 | .endianness = IIO_LE, | |
159 | }, | |
160 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), | |
161 | .modified = 0, | |
162 | }, | |
163 | { | |
164 | .type = IIO_TEMP, | |
165 | .channel2 = IIO_NO_MOD, | |
166 | .address = ST_TEMP_LPS001WP_OUT_L_ADDR, | |
167 | .scan_index = -1, | |
168 | .scan_type = { | |
169 | .sign = 'u', | |
170 | .realbits = 16, | |
171 | .storagebits = 16, | |
172 | .endianness = IIO_LE, | |
173 | }, | |
174 | .info_mask_separate = | |
175 | BIT(IIO_CHAN_INFO_RAW) | | |
176 | BIT(IIO_CHAN_INFO_OFFSET), | |
177 | .modified = 0, | |
178 | }, | |
179 | IIO_CHAN_SOFT_TIMESTAMP(1) | |
180 | }; | |
181 | ||
a7ee8839 | 182 | static const struct st_sensor_settings st_press_sensors_settings[] = { |
217494e5 | 183 | { |
302fbd50 | 184 | .wai = ST_PRESS_LPS331AP_WAI_EXP, |
bc27381e | 185 | .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
217494e5 DC |
186 | .sensors_supported = { |
187 | [0] = LPS331AP_PRESS_DEV_NAME, | |
188 | }, | |
93187840 DC |
189 | .ch = (struct iio_chan_spec *)st_press_1_channels, |
190 | .num_ch = ARRAY_SIZE(st_press_1_channels), | |
217494e5 | 191 | .odr = { |
302fbd50 LJ |
192 | .addr = ST_PRESS_LPS331AP_ODR_ADDR, |
193 | .mask = ST_PRESS_LPS331AP_ODR_MASK, | |
217494e5 | 194 | .odr_avl = { |
302fbd50 LJ |
195 | { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, }, |
196 | { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, }, | |
197 | { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, }, | |
198 | { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, }, | |
217494e5 DC |
199 | }, |
200 | }, | |
201 | .pw = { | |
302fbd50 LJ |
202 | .addr = ST_PRESS_LPS331AP_PW_ADDR, |
203 | .mask = ST_PRESS_LPS331AP_PW_MASK, | |
217494e5 DC |
204 | .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
205 | .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, | |
206 | }, | |
207 | .fs = { | |
302fbd50 LJ |
208 | .addr = ST_PRESS_LPS331AP_FS_ADDR, |
209 | .mask = ST_PRESS_LPS331AP_FS_MASK, | |
217494e5 DC |
210 | .fs_avl = { |
211 | [0] = { | |
212 | .num = ST_PRESS_FS_AVL_1260MB, | |
302fbd50 LJ |
213 | .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL, |
214 | .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN, | |
215 | .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN, | |
217494e5 DC |
216 | }, |
217 | }, | |
218 | }, | |
219 | .bdu = { | |
302fbd50 LJ |
220 | .addr = ST_PRESS_LPS331AP_BDU_ADDR, |
221 | .mask = ST_PRESS_LPS331AP_BDU_MASK, | |
217494e5 DC |
222 | }, |
223 | .drdy_irq = { | |
302fbd50 LJ |
224 | .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR, |
225 | .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK, | |
226 | .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK, | |
a9fd053b LW |
227 | .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR, |
228 | .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK, | |
217494e5 | 229 | }, |
302fbd50 | 230 | .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT, |
217494e5 DC |
231 | .bootime = 2, |
232 | }, | |
7885a8ce LJ |
233 | { |
234 | .wai = ST_PRESS_LPS001WP_WAI_EXP, | |
bc27381e | 235 | .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
7885a8ce LJ |
236 | .sensors_supported = { |
237 | [0] = LPS001WP_PRESS_DEV_NAME, | |
238 | }, | |
239 | .ch = (struct iio_chan_spec *)st_press_lps001wp_channels, | |
240 | .num_ch = ARRAY_SIZE(st_press_lps001wp_channels), | |
241 | .odr = { | |
242 | .addr = ST_PRESS_LPS001WP_ODR_ADDR, | |
243 | .mask = ST_PRESS_LPS001WP_ODR_MASK, | |
244 | .odr_avl = { | |
245 | { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, }, | |
246 | { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, }, | |
247 | { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, }, | |
248 | }, | |
249 | }, | |
250 | .pw = { | |
251 | .addr = ST_PRESS_LPS001WP_PW_ADDR, | |
252 | .mask = ST_PRESS_LPS001WP_PW_MASK, | |
253 | .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, | |
254 | .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, | |
255 | }, | |
256 | .fs = { | |
257 | .addr = 0, | |
258 | }, | |
259 | .bdu = { | |
260 | .addr = ST_PRESS_LPS001WP_BDU_ADDR, | |
261 | .mask = ST_PRESS_LPS001WP_BDU_MASK, | |
262 | }, | |
263 | .drdy_irq = { | |
264 | .addr = 0, | |
265 | }, | |
266 | .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT, | |
267 | .bootime = 2, | |
268 | }, | |
93187840 DC |
269 | { |
270 | .wai = ST_PRESS_LPS25H_WAI_EXP, | |
bc27381e | 271 | .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
93187840 DC |
272 | .sensors_supported = { |
273 | [0] = LPS25H_PRESS_DEV_NAME, | |
274 | }, | |
275 | .ch = (struct iio_chan_spec *)st_press_1_channels, | |
276 | .num_ch = ARRAY_SIZE(st_press_1_channels), | |
277 | .odr = { | |
278 | .addr = ST_PRESS_LPS25H_ODR_ADDR, | |
279 | .mask = ST_PRESS_LPS25H_ODR_MASK, | |
280 | .odr_avl = { | |
281 | { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, }, | |
282 | { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, }, | |
283 | { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, }, | |
284 | { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, }, | |
285 | }, | |
286 | }, | |
287 | .pw = { | |
288 | .addr = ST_PRESS_LPS25H_PW_ADDR, | |
289 | .mask = ST_PRESS_LPS25H_PW_MASK, | |
290 | .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, | |
291 | .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, | |
292 | }, | |
293 | .fs = { | |
294 | .addr = ST_PRESS_LPS25H_FS_ADDR, | |
295 | .mask = ST_PRESS_LPS25H_FS_MASK, | |
296 | .fs_avl = { | |
297 | [0] = { | |
298 | .num = ST_PRESS_FS_AVL_1260MB, | |
299 | .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL, | |
300 | .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN, | |
301 | .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN, | |
302 | }, | |
303 | }, | |
304 | }, | |
305 | .bdu = { | |
306 | .addr = ST_PRESS_LPS25H_BDU_ADDR, | |
307 | .mask = ST_PRESS_LPS25H_BDU_MASK, | |
308 | }, | |
309 | .drdy_irq = { | |
310 | .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR, | |
311 | .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK, | |
312 | .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK, | |
a9fd053b LW |
313 | .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR, |
314 | .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK, | |
93187840 DC |
315 | }, |
316 | .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT, | |
317 | .bootime = 2, | |
318 | }, | |
217494e5 DC |
319 | }; |
320 | ||
2d239c9e JC |
321 | static int st_press_write_raw(struct iio_dev *indio_dev, |
322 | struct iio_chan_spec const *ch, | |
323 | int val, | |
324 | int val2, | |
325 | long mask) | |
326 | { | |
327 | int err; | |
328 | ||
329 | switch (mask) { | |
330 | case IIO_CHAN_INFO_SAMP_FREQ: | |
331 | if (val2) | |
332 | return -EINVAL; | |
333 | mutex_lock(&indio_dev->mlock); | |
334 | err = st_sensors_set_odr(indio_dev, val); | |
335 | mutex_unlock(&indio_dev->mlock); | |
336 | return err; | |
337 | default: | |
338 | return -EINVAL; | |
339 | } | |
340 | } | |
341 | ||
217494e5 DC |
342 | static int st_press_read_raw(struct iio_dev *indio_dev, |
343 | struct iio_chan_spec const *ch, int *val, | |
344 | int *val2, long mask) | |
345 | { | |
346 | int err; | |
a1dcf429 | 347 | struct st_sensor_data *press_data = iio_priv(indio_dev); |
217494e5 DC |
348 | |
349 | switch (mask) { | |
350 | case IIO_CHAN_INFO_RAW: | |
351 | err = st_sensors_read_info_raw(indio_dev, ch, val); | |
352 | if (err < 0) | |
353 | goto read_error; | |
354 | ||
355 | return IIO_VAL_INT; | |
356 | case IIO_CHAN_INFO_SCALE: | |
357 | *val = 0; | |
358 | ||
359 | switch (ch->type) { | |
360 | case IIO_PRESSURE: | |
a1dcf429 | 361 | *val2 = press_data->current_fullscale->gain; |
217494e5 DC |
362 | break; |
363 | case IIO_TEMP: | |
a1dcf429 | 364 | *val2 = press_data->current_fullscale->gain2; |
217494e5 DC |
365 | break; |
366 | default: | |
367 | err = -EINVAL; | |
368 | goto read_error; | |
369 | } | |
370 | ||
371 | return IIO_VAL_INT_PLUS_NANO; | |
372 | case IIO_CHAN_INFO_OFFSET: | |
373 | switch (ch->type) { | |
374 | case IIO_TEMP: | |
375 | *val = 425; | |
376 | *val2 = 10; | |
377 | break; | |
378 | default: | |
379 | err = -EINVAL; | |
380 | goto read_error; | |
381 | } | |
382 | ||
383 | return IIO_VAL_FRACTIONAL; | |
2d239c9e | 384 | case IIO_CHAN_INFO_SAMP_FREQ: |
a1dcf429 | 385 | *val = press_data->odr; |
2d239c9e | 386 | return IIO_VAL_INT; |
217494e5 DC |
387 | default: |
388 | return -EINVAL; | |
389 | } | |
390 | ||
391 | read_error: | |
392 | return err; | |
393 | } | |
394 | ||
217494e5 DC |
395 | static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); |
396 | ||
397 | static struct attribute *st_press_attributes[] = { | |
398 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, | |
217494e5 DC |
399 | NULL, |
400 | }; | |
401 | ||
402 | static const struct attribute_group st_press_attribute_group = { | |
403 | .attrs = st_press_attributes, | |
404 | }; | |
405 | ||
406 | static const struct iio_info press_info = { | |
407 | .driver_module = THIS_MODULE, | |
408 | .attrs = &st_press_attribute_group, | |
409 | .read_raw = &st_press_read_raw, | |
2d239c9e | 410 | .write_raw = &st_press_write_raw, |
a0175b9c | 411 | .debugfs_reg_access = &st_sensors_debugfs_reg_access, |
217494e5 DC |
412 | }; |
413 | ||
414 | #ifdef CONFIG_IIO_TRIGGER | |
415 | static const struct iio_trigger_ops st_press_trigger_ops = { | |
416 | .owner = THIS_MODULE, | |
417 | .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE, | |
418 | }; | |
419 | #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops) | |
420 | #else | |
421 | #define ST_PRESS_TRIGGER_OPS NULL | |
422 | #endif | |
423 | ||
0baa3fc1 | 424 | int st_press_common_probe(struct iio_dev *indio_dev) |
217494e5 | 425 | { |
a1dcf429 DC |
426 | struct st_sensor_data *press_data = iio_priv(indio_dev); |
427 | int irq = press_data->get_irq_data_ready(indio_dev); | |
a6cc5b25 | 428 | int err; |
217494e5 DC |
429 | |
430 | indio_dev->modes = INDIO_DIRECT_MODE; | |
431 | indio_dev->info = &press_info; | |
8e71c04f | 432 | mutex_init(&press_data->tb.buf_lock); |
217494e5 | 433 | |
ea7e586b | 434 | st_sensors_power_enable(indio_dev); |
77448761 | 435 | |
217494e5 | 436 | err = st_sensors_check_device_support(indio_dev, |
a7ee8839 DC |
437 | ARRAY_SIZE(st_press_sensors_settings), |
438 | st_press_sensors_settings); | |
217494e5 | 439 | if (err < 0) |
a6cc5b25 | 440 | return err; |
217494e5 | 441 | |
a1dcf429 DC |
442 | press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS; |
443 | press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; | |
444 | indio_dev->channels = press_data->sensor_settings->ch; | |
445 | indio_dev->num_channels = press_data->sensor_settings->num_ch; | |
217494e5 | 446 | |
a1dcf429 DC |
447 | if (press_data->sensor_settings->fs.addr != 0) |
448 | press_data->current_fullscale = | |
449 | (struct st_sensor_fullscale_avl *) | |
450 | &press_data->sensor_settings->fs.fs_avl[0]; | |
362f2f86 | 451 | |
a1dcf429 | 452 | press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz; |
217494e5 | 453 | |
38d1c6a9 | 454 | /* Some devices don't support a data ready pin. */ |
a1dcf429 DC |
455 | if (!press_data->dev->platform_data && |
456 | press_data->sensor_settings->drdy_irq.addr) | |
457 | press_data->dev->platform_data = | |
23cde4d6 DC |
458 | (struct st_sensors_platform_data *)&default_press_pdata; |
459 | ||
a1dcf429 | 460 | err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data); |
217494e5 | 461 | if (err < 0) |
a6cc5b25 | 462 | return err; |
217494e5 | 463 | |
7a137c9c DC |
464 | err = st_press_allocate_ring(indio_dev); |
465 | if (err < 0) | |
466 | return err; | |
217494e5 | 467 | |
7a137c9c | 468 | if (irq > 0) { |
217494e5 | 469 | err = st_sensors_allocate_trigger(indio_dev, |
a6cc5b25 | 470 | ST_PRESS_TRIGGER_OPS); |
217494e5 DC |
471 | if (err < 0) |
472 | goto st_press_probe_trigger_error; | |
473 | } | |
474 | ||
475 | err = iio_device_register(indio_dev); | |
476 | if (err) | |
477 | goto st_press_device_register_error; | |
478 | ||
4f544ced LW |
479 | dev_info(&indio_dev->dev, "registered pressure sensor %s\n", |
480 | indio_dev->name); | |
481 | ||
217494e5 DC |
482 | return err; |
483 | ||
484 | st_press_device_register_error: | |
a6cc5b25 | 485 | if (irq > 0) |
217494e5 DC |
486 | st_sensors_deallocate_trigger(indio_dev); |
487 | st_press_probe_trigger_error: | |
7a137c9c | 488 | st_press_deallocate_ring(indio_dev); |
a6cc5b25 | 489 | |
217494e5 DC |
490 | return err; |
491 | } | |
492 | EXPORT_SYMBOL(st_press_common_probe); | |
493 | ||
494 | void st_press_common_remove(struct iio_dev *indio_dev) | |
495 | { | |
a1dcf429 | 496 | struct st_sensor_data *press_data = iio_priv(indio_dev); |
217494e5 | 497 | |
ea7e586b | 498 | st_sensors_power_disable(indio_dev); |
77448761 | 499 | |
217494e5 | 500 | iio_device_unregister(indio_dev); |
a1dcf429 | 501 | if (press_data->get_irq_data_ready(indio_dev) > 0) |
217494e5 | 502 | st_sensors_deallocate_trigger(indio_dev); |
7a137c9c DC |
503 | |
504 | st_press_deallocate_ring(indio_dev); | |
217494e5 DC |
505 | } |
506 | EXPORT_SYMBOL(st_press_common_remove); | |
507 | ||
508 | MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); | |
509 | MODULE_DESCRIPTION("STMicroelectronics pressures driver"); | |
510 | MODULE_LICENSE("GPL v2"); |