2 * STMicroelectronics pressures driver
4 * Copyright 2013 STMicroelectronics Inc.
6 * Denis Ciocca <denis.ciocca@st.com>
8 * Licensed under the GPL-2.
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>
28 #include <linux/iio/common/st_sensors.h>
29 #include "st_pressure.h"
31 #define ST_PRESS_LSB_PER_MBAR 4096UL
32 #define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
33 ST_PRESS_LSB_PER_MBAR)
34 #define ST_PRESS_LSB_PER_CELSIUS 480UL
35 #define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \
36 ST_PRESS_LSB_PER_CELSIUS)
37 #define ST_PRESS_NUMBER_DATA_CHANNELS 1
40 #define ST_PRESS_FS_AVL_1260MB 1260
42 #define ST_PRESS_1_OUT_XL_ADDR 0x28
43 #define ST_TEMP_1_OUT_L_ADDR 0x2b
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
65 #define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22
66 #define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80
67 #define ST_PRESS_LPS331AP_OD_IRQ_ADDR 0x22
68 #define ST_PRESS_LPS331AP_OD_IRQ_MASK 0x40
69 #define ST_PRESS_LPS331AP_MULTIREAD_BIT true
70 #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
72 /* CUSTOM VALUES FOR LPS001WP SENSOR */
73 #define ST_PRESS_LPS001WP_WAI_EXP 0xba
74 #define ST_PRESS_LPS001WP_ODR_ADDR 0x20
75 #define ST_PRESS_LPS001WP_ODR_MASK 0x30
76 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
77 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
78 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
79 #define ST_PRESS_LPS001WP_PW_ADDR 0x20
80 #define ST_PRESS_LPS001WP_PW_MASK 0x40
81 #define ST_PRESS_LPS001WP_BDU_ADDR 0x20
82 #define ST_PRESS_LPS001WP_BDU_MASK 0x04
83 #define ST_PRESS_LPS001WP_MULTIREAD_BIT true
84 #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
85 #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
87 /* CUSTOM VALUES FOR LPS25H SENSOR */
88 #define ST_PRESS_LPS25H_WAI_EXP 0xbd
89 #define ST_PRESS_LPS25H_ODR_ADDR 0x20
90 #define ST_PRESS_LPS25H_ODR_MASK 0x70
91 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
92 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
93 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
94 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
95 #define ST_PRESS_LPS25H_PW_ADDR 0x20
96 #define ST_PRESS_LPS25H_PW_MASK 0x80
97 #define ST_PRESS_LPS25H_FS_ADDR 0x00
98 #define ST_PRESS_LPS25H_FS_MASK 0x00
99 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
100 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
101 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
102 #define ST_PRESS_LPS25H_BDU_ADDR 0x20
103 #define ST_PRESS_LPS25H_BDU_MASK 0x04
104 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
105 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
106 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
107 #define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22
108 #define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80
109 #define ST_PRESS_LPS25H_OD_IRQ_ADDR 0x22
110 #define ST_PRESS_LPS25H_OD_IRQ_MASK 0x40
111 #define ST_PRESS_LPS25H_MULTIREAD_BIT true
112 #define ST_PRESS_LPS25H_TEMP_OFFSET 42500
113 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
114 #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
116 static const struct iio_chan_spec st_press_1_channels
[] = {
118 .type
= IIO_PRESSURE
,
119 .channel2
= IIO_NO_MOD
,
120 .address
= ST_PRESS_1_OUT_XL_ADDR
,
121 .scan_index
= ST_SENSORS_SCAN_X
,
126 .endianness
= IIO_LE
,
128 .info_mask_separate
=
129 BIT(IIO_CHAN_INFO_RAW
) | BIT(IIO_CHAN_INFO_SCALE
),
134 .channel2
= IIO_NO_MOD
,
135 .address
= ST_TEMP_1_OUT_L_ADDR
,
141 .endianness
= IIO_LE
,
143 .info_mask_separate
=
144 BIT(IIO_CHAN_INFO_RAW
) |
145 BIT(IIO_CHAN_INFO_SCALE
) |
146 BIT(IIO_CHAN_INFO_OFFSET
),
149 IIO_CHAN_SOFT_TIMESTAMP(1)
152 static const struct iio_chan_spec st_press_lps001wp_channels
[] = {
154 .type
= IIO_PRESSURE
,
155 .channel2
= IIO_NO_MOD
,
156 .address
= ST_PRESS_LPS001WP_OUT_L_ADDR
,
157 .scan_index
= ST_SENSORS_SCAN_X
,
162 .endianness
= IIO_LE
,
164 .info_mask_separate
= BIT(IIO_CHAN_INFO_RAW
),
169 .channel2
= IIO_NO_MOD
,
170 .address
= ST_TEMP_LPS001WP_OUT_L_ADDR
,
176 .endianness
= IIO_LE
,
178 .info_mask_separate
=
179 BIT(IIO_CHAN_INFO_RAW
) |
180 BIT(IIO_CHAN_INFO_OFFSET
),
183 IIO_CHAN_SOFT_TIMESTAMP(1)
186 static const struct st_sensor_settings st_press_sensors_settings
[] = {
188 .wai
= ST_PRESS_LPS331AP_WAI_EXP
,
189 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
190 .sensors_supported
= {
191 [0] = LPS331AP_PRESS_DEV_NAME
,
193 .ch
= (struct iio_chan_spec
*)st_press_1_channels
,
194 .num_ch
= ARRAY_SIZE(st_press_1_channels
),
196 .addr
= ST_PRESS_LPS331AP_ODR_ADDR
,
197 .mask
= ST_PRESS_LPS331AP_ODR_MASK
,
199 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL
, },
200 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL
, },
201 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL
, },
202 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL
, },
206 .addr
= ST_PRESS_LPS331AP_PW_ADDR
,
207 .mask
= ST_PRESS_LPS331AP_PW_MASK
,
208 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
209 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
212 .addr
= ST_PRESS_LPS331AP_FS_ADDR
,
213 .mask
= ST_PRESS_LPS331AP_FS_MASK
,
216 .num
= ST_PRESS_FS_AVL_1260MB
,
217 .value
= ST_PRESS_LPS331AP_FS_AVL_1260_VAL
,
218 .gain
= ST_PRESS_LPS331AP_FS_AVL_1260_GAIN
,
219 .gain2
= ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN
,
224 .addr
= ST_PRESS_LPS331AP_BDU_ADDR
,
225 .mask
= ST_PRESS_LPS331AP_BDU_MASK
,
228 .addr
= ST_PRESS_LPS331AP_DRDY_IRQ_ADDR
,
229 .mask_int1
= ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK
,
230 .mask_int2
= ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK
,
231 .addr_ihl
= ST_PRESS_LPS331AP_IHL_IRQ_ADDR
,
232 .mask_ihl
= ST_PRESS_LPS331AP_IHL_IRQ_MASK
,
233 .addr_od
= ST_PRESS_LPS331AP_OD_IRQ_ADDR
,
234 .mask_od
= ST_PRESS_LPS331AP_OD_IRQ_MASK
,
235 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
237 .multi_read_bit
= ST_PRESS_LPS331AP_MULTIREAD_BIT
,
241 .wai
= ST_PRESS_LPS001WP_WAI_EXP
,
242 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
243 .sensors_supported
= {
244 [0] = LPS001WP_PRESS_DEV_NAME
,
246 .ch
= (struct iio_chan_spec
*)st_press_lps001wp_channels
,
247 .num_ch
= ARRAY_SIZE(st_press_lps001wp_channels
),
249 .addr
= ST_PRESS_LPS001WP_ODR_ADDR
,
250 .mask
= ST_PRESS_LPS001WP_ODR_MASK
,
252 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL
, },
253 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL
, },
254 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL
, },
258 .addr
= ST_PRESS_LPS001WP_PW_ADDR
,
259 .mask
= ST_PRESS_LPS001WP_PW_MASK
,
260 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
261 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
267 .addr
= ST_PRESS_LPS001WP_BDU_ADDR
,
268 .mask
= ST_PRESS_LPS001WP_BDU_MASK
,
273 .multi_read_bit
= ST_PRESS_LPS001WP_MULTIREAD_BIT
,
277 .wai
= ST_PRESS_LPS25H_WAI_EXP
,
278 .wai_addr
= ST_SENSORS_DEFAULT_WAI_ADDRESS
,
279 .sensors_supported
= {
280 [0] = LPS25H_PRESS_DEV_NAME
,
282 .ch
= (struct iio_chan_spec
*)st_press_1_channels
,
283 .num_ch
= ARRAY_SIZE(st_press_1_channels
),
285 .addr
= ST_PRESS_LPS25H_ODR_ADDR
,
286 .mask
= ST_PRESS_LPS25H_ODR_MASK
,
288 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL
, },
289 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL
, },
290 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL
, },
291 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL
, },
295 .addr
= ST_PRESS_LPS25H_PW_ADDR
,
296 .mask
= ST_PRESS_LPS25H_PW_MASK
,
297 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
298 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
301 .addr
= ST_PRESS_LPS25H_FS_ADDR
,
302 .mask
= ST_PRESS_LPS25H_FS_MASK
,
305 .num
= ST_PRESS_FS_AVL_1260MB
,
306 .value
= ST_PRESS_LPS25H_FS_AVL_1260_VAL
,
307 .gain
= ST_PRESS_LPS25H_FS_AVL_1260_GAIN
,
308 .gain2
= ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN
,
313 .addr
= ST_PRESS_LPS25H_BDU_ADDR
,
314 .mask
= ST_PRESS_LPS25H_BDU_MASK
,
317 .addr
= ST_PRESS_LPS25H_DRDY_IRQ_ADDR
,
318 .mask_int1
= ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK
,
319 .mask_int2
= ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK
,
320 .addr_ihl
= ST_PRESS_LPS25H_IHL_IRQ_ADDR
,
321 .mask_ihl
= ST_PRESS_LPS25H_IHL_IRQ_MASK
,
322 .addr_od
= ST_PRESS_LPS25H_OD_IRQ_ADDR
,
323 .mask_od
= ST_PRESS_LPS25H_OD_IRQ_MASK
,
324 .addr_stat_drdy
= ST_SENSORS_DEFAULT_STAT_ADDR
,
326 .multi_read_bit
= ST_PRESS_LPS25H_MULTIREAD_BIT
,
331 static int st_press_write_raw(struct iio_dev
*indio_dev
,
332 struct iio_chan_spec
const *ch
,
340 case IIO_CHAN_INFO_SAMP_FREQ
:
343 mutex_lock(&indio_dev
->mlock
);
344 err
= st_sensors_set_odr(indio_dev
, val
);
345 mutex_unlock(&indio_dev
->mlock
);
352 static int st_press_read_raw(struct iio_dev
*indio_dev
,
353 struct iio_chan_spec
const *ch
, int *val
,
354 int *val2
, long mask
)
357 struct st_sensor_data
*press_data
= iio_priv(indio_dev
);
360 case IIO_CHAN_INFO_RAW
:
361 err
= st_sensors_read_info_raw(indio_dev
, ch
, val
);
366 case IIO_CHAN_INFO_SCALE
:
371 *val2
= press_data
->current_fullscale
->gain
;
374 *val2
= press_data
->current_fullscale
->gain2
;
381 return IIO_VAL_INT_PLUS_NANO
;
382 case IIO_CHAN_INFO_OFFSET
:
393 return IIO_VAL_FRACTIONAL
;
394 case IIO_CHAN_INFO_SAMP_FREQ
:
395 *val
= press_data
->odr
;
405 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
407 static struct attribute
*st_press_attributes
[] = {
408 &iio_dev_attr_sampling_frequency_available
.dev_attr
.attr
,
412 static const struct attribute_group st_press_attribute_group
= {
413 .attrs
= st_press_attributes
,
416 static const struct iio_info press_info
= {
417 .driver_module
= THIS_MODULE
,
418 .attrs
= &st_press_attribute_group
,
419 .read_raw
= &st_press_read_raw
,
420 .write_raw
= &st_press_write_raw
,
421 .debugfs_reg_access
= &st_sensors_debugfs_reg_access
,
424 #ifdef CONFIG_IIO_TRIGGER
425 static const struct iio_trigger_ops st_press_trigger_ops
= {
426 .owner
= THIS_MODULE
,
427 .set_trigger_state
= ST_PRESS_TRIGGER_SET_STATE
,
429 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
431 #define ST_PRESS_TRIGGER_OPS NULL
434 int st_press_common_probe(struct iio_dev
*indio_dev
)
436 struct st_sensor_data
*press_data
= iio_priv(indio_dev
);
437 int irq
= press_data
->get_irq_data_ready(indio_dev
);
440 indio_dev
->modes
= INDIO_DIRECT_MODE
;
441 indio_dev
->info
= &press_info
;
442 mutex_init(&press_data
->tb
.buf_lock
);
444 st_sensors_power_enable(indio_dev
);
446 err
= st_sensors_check_device_support(indio_dev
,
447 ARRAY_SIZE(st_press_sensors_settings
),
448 st_press_sensors_settings
);
452 press_data
->num_data_channels
= ST_PRESS_NUMBER_DATA_CHANNELS
;
453 press_data
->multiread_bit
= press_data
->sensor_settings
->multi_read_bit
;
454 indio_dev
->channels
= press_data
->sensor_settings
->ch
;
455 indio_dev
->num_channels
= press_data
->sensor_settings
->num_ch
;
457 if (press_data
->sensor_settings
->fs
.addr
!= 0)
458 press_data
->current_fullscale
=
459 (struct st_sensor_fullscale_avl
*)
460 &press_data
->sensor_settings
->fs
.fs_avl
[0];
462 press_data
->odr
= press_data
->sensor_settings
->odr
.odr_avl
[0].hz
;
464 /* Some devices don't support a data ready pin. */
465 if (!press_data
->dev
->platform_data
&&
466 press_data
->sensor_settings
->drdy_irq
.addr
)
467 press_data
->dev
->platform_data
=
468 (struct st_sensors_platform_data
*)&default_press_pdata
;
470 err
= st_sensors_init_sensor(indio_dev
, press_data
->dev
->platform_data
);
474 err
= st_press_allocate_ring(indio_dev
);
479 err
= st_sensors_allocate_trigger(indio_dev
,
480 ST_PRESS_TRIGGER_OPS
);
482 goto st_press_probe_trigger_error
;
485 err
= iio_device_register(indio_dev
);
487 goto st_press_device_register_error
;
489 dev_info(&indio_dev
->dev
, "registered pressure sensor %s\n",
494 st_press_device_register_error
:
496 st_sensors_deallocate_trigger(indio_dev
);
497 st_press_probe_trigger_error
:
498 st_press_deallocate_ring(indio_dev
);
502 EXPORT_SYMBOL(st_press_common_probe
);
504 void st_press_common_remove(struct iio_dev
*indio_dev
)
506 struct st_sensor_data
*press_data
= iio_priv(indio_dev
);
508 st_sensors_power_disable(indio_dev
);
510 iio_device_unregister(indio_dev
);
511 if (press_data
->get_irq_data_ready(indio_dev
) > 0)
512 st_sensors_deallocate_trigger(indio_dev
);
514 st_press_deallocate_ring(indio_dev
);
516 EXPORT_SYMBOL(st_press_common_remove
);
518 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
519 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
520 MODULE_LICENSE("GPL v2");