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_MULTIREAD_BIT true
66 #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
68 /* CUSTOM VALUES FOR LPS001WP SENSOR */
69 #define ST_PRESS_LPS001WP_WAI_EXP 0xba
70 #define ST_PRESS_LPS001WP_ODR_ADDR 0x20
71 #define ST_PRESS_LPS001WP_ODR_MASK 0x30
72 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
73 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
74 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
75 #define ST_PRESS_LPS001WP_PW_ADDR 0x20
76 #define ST_PRESS_LPS001WP_PW_MASK 0x40
77 #define ST_PRESS_LPS001WP_BDU_ADDR 0x20
78 #define ST_PRESS_LPS001WP_BDU_MASK 0x04
79 #define ST_PRESS_LPS001WP_MULTIREAD_BIT true
80 #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
81 #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
83 /* CUSTOM VALUES FOR LPS25H SENSOR */
84 #define ST_PRESS_LPS25H_WAI_EXP 0xbd
85 #define ST_PRESS_LPS25H_ODR_ADDR 0x20
86 #define ST_PRESS_LPS25H_ODR_MASK 0x70
87 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
88 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
89 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
90 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
91 #define ST_PRESS_LPS25H_PW_ADDR 0x20
92 #define ST_PRESS_LPS25H_PW_MASK 0x80
93 #define ST_PRESS_LPS25H_FS_ADDR 0x00
94 #define ST_PRESS_LPS25H_FS_MASK 0x00
95 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
96 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
97 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
98 #define ST_PRESS_LPS25H_BDU_ADDR 0x20
99 #define ST_PRESS_LPS25H_BDU_MASK 0x04
100 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
101 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
102 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
103 #define ST_PRESS_LPS25H_MULTIREAD_BIT true
104 #define ST_PRESS_LPS25H_TEMP_OFFSET 42500
105 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
106 #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
108 static const struct iio_chan_spec st_press_1_channels[] = {
110 .type = IIO_PRESSURE,
111 .channel2 = IIO_NO_MOD,
112 .address = ST_PRESS_1_OUT_XL_ADDR,
113 .scan_index = ST_SENSORS_SCAN_X,
118 .endianness = IIO_LE,
120 .info_mask_separate =
121 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
126 .channel2 = IIO_NO_MOD,
127 .address = ST_TEMP_1_OUT_L_ADDR,
133 .endianness = IIO_LE,
135 .info_mask_separate =
136 BIT(IIO_CHAN_INFO_RAW) |
137 BIT(IIO_CHAN_INFO_SCALE) |
138 BIT(IIO_CHAN_INFO_OFFSET),
141 IIO_CHAN_SOFT_TIMESTAMP(1)
144 static const struct iio_chan_spec st_press_lps001wp_channels[] = {
146 .type = IIO_PRESSURE,
147 .channel2 = IIO_NO_MOD,
148 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
149 .scan_index = ST_SENSORS_SCAN_X,
154 .endianness = IIO_LE,
156 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
161 .channel2 = IIO_NO_MOD,
162 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
168 .endianness = IIO_LE,
170 .info_mask_separate =
171 BIT(IIO_CHAN_INFO_RAW) |
172 BIT(IIO_CHAN_INFO_OFFSET),
175 IIO_CHAN_SOFT_TIMESTAMP(1)
178 static const struct st_sensors st_press_sensors[] = {
180 .wai = ST_PRESS_LPS331AP_WAI_EXP,
181 .sensors_supported = {
182 [0] = LPS331AP_PRESS_DEV_NAME,
184 .ch = (struct iio_chan_spec *)st_press_1_channels,
185 .num_ch = ARRAY_SIZE(st_press_1_channels),
187 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
188 .mask = ST_PRESS_LPS331AP_ODR_MASK,
190 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
191 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
192 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
193 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
197 .addr = ST_PRESS_LPS331AP_PW_ADDR,
198 .mask = ST_PRESS_LPS331AP_PW_MASK,
199 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
200 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
203 .addr = ST_PRESS_LPS331AP_FS_ADDR,
204 .mask = ST_PRESS_LPS331AP_FS_MASK,
207 .num = ST_PRESS_FS_AVL_1260MB,
208 .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
209 .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
210 .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
215 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
216 .mask = ST_PRESS_LPS331AP_BDU_MASK,
219 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
220 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
221 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
223 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
227 .wai = ST_PRESS_LPS001WP_WAI_EXP,
228 .sensors_supported = {
229 [0] = LPS001WP_PRESS_DEV_NAME,
231 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
232 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
234 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
235 .mask = ST_PRESS_LPS001WP_ODR_MASK,
237 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
238 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
239 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
243 .addr = ST_PRESS_LPS001WP_PW_ADDR,
244 .mask = ST_PRESS_LPS001WP_PW_MASK,
245 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
246 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
252 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
253 .mask = ST_PRESS_LPS001WP_BDU_MASK,
258 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
262 .wai = ST_PRESS_LPS25H_WAI_EXP,
263 .sensors_supported = {
264 [0] = LPS25H_PRESS_DEV_NAME,
266 .ch = (struct iio_chan_spec *)st_press_1_channels,
267 .num_ch = ARRAY_SIZE(st_press_1_channels),
269 .addr = ST_PRESS_LPS25H_ODR_ADDR,
270 .mask = ST_PRESS_LPS25H_ODR_MASK,
272 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
273 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
274 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
275 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
279 .addr = ST_PRESS_LPS25H_PW_ADDR,
280 .mask = ST_PRESS_LPS25H_PW_MASK,
281 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
282 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
285 .addr = ST_PRESS_LPS25H_FS_ADDR,
286 .mask = ST_PRESS_LPS25H_FS_MASK,
289 .num = ST_PRESS_FS_AVL_1260MB,
290 .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
291 .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
292 .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
297 .addr = ST_PRESS_LPS25H_BDU_ADDR,
298 .mask = ST_PRESS_LPS25H_BDU_MASK,
301 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
302 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
303 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
305 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
310 static int st_press_write_raw(struct iio_dev *indio_dev,
311 struct iio_chan_spec const *ch,
319 case IIO_CHAN_INFO_SAMP_FREQ:
322 mutex_lock(&indio_dev->mlock);
323 err = st_sensors_set_odr(indio_dev, val);
324 mutex_unlock(&indio_dev->mlock);
331 static int st_press_read_raw(struct iio_dev *indio_dev,
332 struct iio_chan_spec const *ch, int *val,
333 int *val2, long mask)
336 struct st_sensor_data *pdata = iio_priv(indio_dev);
339 case IIO_CHAN_INFO_RAW:
340 err = st_sensors_read_info_raw(indio_dev, ch, val);
345 case IIO_CHAN_INFO_SCALE:
350 *val2 = pdata->current_fullscale->gain;
353 *val2 = pdata->current_fullscale->gain2;
360 return IIO_VAL_INT_PLUS_NANO;
361 case IIO_CHAN_INFO_OFFSET:
372 return IIO_VAL_FRACTIONAL;
373 case IIO_CHAN_INFO_SAMP_FREQ:
384 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
386 static struct attribute *st_press_attributes[] = {
387 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
391 static const struct attribute_group st_press_attribute_group = {
392 .attrs = st_press_attributes,
395 static const struct iio_info press_info = {
396 .driver_module = THIS_MODULE,
397 .attrs = &st_press_attribute_group,
398 .read_raw = &st_press_read_raw,
399 .write_raw = &st_press_write_raw,
402 #ifdef CONFIG_IIO_TRIGGER
403 static const struct iio_trigger_ops st_press_trigger_ops = {
404 .owner = THIS_MODULE,
405 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
407 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
409 #define ST_PRESS_TRIGGER_OPS NULL
412 int st_press_common_probe(struct iio_dev *indio_dev,
413 struct st_sensors_platform_data *plat_data)
415 struct st_sensor_data *pdata = iio_priv(indio_dev);
416 int irq = pdata->get_irq_data_ready(indio_dev);
419 indio_dev->modes = INDIO_DIRECT_MODE;
420 indio_dev->info = &press_info;
422 st_sensors_power_enable(indio_dev);
424 err = st_sensors_check_device_support(indio_dev,
425 ARRAY_SIZE(st_press_sensors),
430 pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
431 pdata->multiread_bit = pdata->sensor->multi_read_bit;
432 indio_dev->channels = pdata->sensor->ch;
433 indio_dev->num_channels = pdata->sensor->num_ch;
435 if (pdata->sensor->fs.addr != 0)
436 pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
437 &pdata->sensor->fs.fs_avl[0];
439 pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
441 /* Some devices don't support a data ready pin. */
442 if (!plat_data && pdata->sensor->drdy_irq.addr)
444 (struct st_sensors_platform_data *)&default_press_pdata;
446 err = st_sensors_init_sensor(indio_dev, plat_data);
450 err = st_press_allocate_ring(indio_dev);
455 err = st_sensors_allocate_trigger(indio_dev,
456 ST_PRESS_TRIGGER_OPS);
458 goto st_press_probe_trigger_error;
461 err = iio_device_register(indio_dev);
463 goto st_press_device_register_error;
465 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
470 st_press_device_register_error:
472 st_sensors_deallocate_trigger(indio_dev);
473 st_press_probe_trigger_error:
474 st_press_deallocate_ring(indio_dev);
478 EXPORT_SYMBOL(st_press_common_probe);
480 void st_press_common_remove(struct iio_dev *indio_dev)
482 struct st_sensor_data *pdata = iio_priv(indio_dev);
484 st_sensors_power_disable(indio_dev);
486 iio_device_unregister(indio_dev);
487 if (pdata->get_irq_data_ready(indio_dev) > 0)
488 st_sensors_deallocate_trigger(indio_dev);
490 st_press_deallocate_ring(indio_dev);
492 EXPORT_SYMBOL(st_press_common_remove);
494 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
495 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
496 MODULE_LICENSE("GPL v2");