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iio:st_pressure:initial lps22hb sensor support 

Initial support for ST LPS22HB pressure sensor. Datasheet:
http://www2.st.com/resource/en/datasheet/lps22hb.pdf

Features:
* pressure data and timestamping channels
* sampling frequency selection
* interrupt based trigger
* over I2C or SPI

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie 2016-04-19 11:18:32 +02:00 committed by Jonathan Cameron
parent ef2d71d6b7
commit e039e2f5b4
6 changed files with 97 additions and 5 deletions
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1
Documentation/devicetree/bindings/iio/st-sensors.txt
View File

@ -64,3 +64,4 @@ Pressure sensors:
- st,lps001wp-press
- st,lps25h-press
- st,lps331ap-press
- st,lps22hb-press

2
drivers/iio/pressure/Kconfig
View File

@ -131,7 +131,7 @@ config IIO_ST_PRESS
select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
help
Say yes here to build support for STMicroelectronics pressure
sensors: LPS001WP, LPS25H, LPS331AP.
sensors: LPS001WP, LPS25H, LPS331AP, LPS22HB.
This driver can also be built as a module. If so, these modules
will be created:

1
drivers/iio/pressure/st_pressure.h
View File

@ -17,6 +17,7 @@
#define LPS001WP_PRESS_DEV_NAME "lps001wp"
#define LPS25H_PRESS_DEV_NAME "lps25h"
#define LPS331AP_PRESS_DEV_NAME "lps331ap"
#define LPS22HB_PRESS_DEV_NAME "lps22hb"
/**
* struct st_sensors_platform_data - default press platform data

93
drivers/iio/pressure/st_pressure_core.c
View File

@ -113,6 +113,26 @@
#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
/* CUSTOM VALUES FOR LPS22HB SENSOR */
#define ST_PRESS_LPS22HB_WAI_EXP 0xb1
#define ST_PRESS_LPS22HB_ODR_ADDR 0x10
#define ST_PRESS_LPS22HB_ODR_MASK 0x70
#define ST_PRESS_LPS22HB_ODR_AVL_1HZ_VAL 0x01
#define ST_PRESS_LPS22HB_ODR_AVL_10HZ_VAL 0x02
#define ST_PRESS_LPS22HB_ODR_AVL_25HZ_VAL 0x03
#define ST_PRESS_LPS22HB_ODR_AVL_50HZ_VAL 0x04
#define ST_PRESS_LPS22HB_ODR_AVL_75HZ_VAL 0x05
#define ST_PRESS_LPS22HB_PW_ADDR 0x10
#define ST_PRESS_LPS22HB_PW_MASK 0x70
#define ST_PRESS_LPS22HB_BDU_ADDR 0x10
#define ST_PRESS_LPS22HB_BDU_MASK 0x02
#define ST_PRESS_LPS22HB_DRDY_IRQ_ADDR 0x12
#define ST_PRESS_LPS22HB_DRDY_IRQ_INT1_MASK 0x04
#define ST_PRESS_LPS22HB_DRDY_IRQ_INT2_MASK 0x08
#define ST_PRESS_LPS22HB_IHL_IRQ_ADDR 0x12
#define ST_PRESS_LPS22HB_IHL_IRQ_MASK 0x80
#define ST_PRESS_LPS22HB_MULTIREAD_BIT true
static const struct iio_chan_spec st_press_1_channels[] = {
{
.type = IIO_PRESSURE,
@ -183,6 +203,27 @@ static const struct iio_chan_spec st_press_lps001wp_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(1)
};
static const struct iio_chan_spec st_press_lps22hb_channels[] = {
{
.type = IIO_PRESSURE,
.channel2 = IIO_NO_MOD,
.address = ST_PRESS_1_OUT_XL_ADDR,
.scan_index = 0,
.scan_type = {
.sign = 'u',
.realbits = 24,
.storagebits = 24,
.endianness = IIO_LE,
},
.info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE),
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
.modified = 0,
},
IIO_CHAN_SOFT_TIMESTAMP(1)
};
static const struct st_sensor_settings st_press_sensors_settings[] = {
{
.wai = ST_PRESS_LPS331AP_WAI_EXP,
@ -326,6 +367,51 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
.multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_PRESS_LPS22HB_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LPS22HB_PRESS_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
.num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
.odr = {
.addr = ST_PRESS_LPS22HB_ODR_ADDR,
.mask = ST_PRESS_LPS22HB_ODR_MASK,
.odr_avl = {
{ 1, ST_PRESS_LPS22HB_ODR_AVL_1HZ_VAL, },
{ 10, ST_PRESS_LPS22HB_ODR_AVL_10HZ_VAL, },
{ 25, ST_PRESS_LPS22HB_ODR_AVL_25HZ_VAL, },
{ 50, ST_PRESS_LPS22HB_ODR_AVL_50HZ_VAL, },
{ 75, ST_PRESS_LPS22HB_ODR_AVL_75HZ_VAL, },
},
},
.pw = {
.addr = ST_PRESS_LPS22HB_PW_ADDR,
.mask = ST_PRESS_LPS22HB_PW_MASK,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.fs = {
.fs_avl = {
[0] = {
.num = ST_PRESS_FS_AVL_1260MB,
.gain = ST_PRESS_KPASCAL_NANO_SCALE,
},
},
},
.bdu = {
.addr = ST_PRESS_LPS22HB_BDU_ADDR,
.mask = ST_PRESS_LPS22HB_BDU_MASK,
},
.drdy_irq = {
.addr = ST_PRESS_LPS22HB_DRDY_IRQ_ADDR,
.mask_int1 = ST_PRESS_LPS22HB_DRDY_IRQ_INT1_MASK,
.mask_int2 = ST_PRESS_LPS22HB_DRDY_IRQ_INT2_MASK,
.addr_ihl = ST_PRESS_LPS22HB_IHL_IRQ_ADDR,
.mask_ihl = ST_PRESS_LPS22HB_IHL_IRQ_MASK,
},
.multi_read_bit = ST_PRESS_LPS22HB_MULTIREAD_BIT,
},
};
static int st_press_write_raw(struct iio_dev *indio_dev,
@ -454,10 +540,9 @@ int st_press_common_probe(struct iio_dev *indio_dev)
indio_dev->channels = press_data->sensor_settings->ch;
indio_dev->num_channels = press_data->sensor_settings->num_ch;
if (press_data->sensor_settings->fs.addr != 0)
press_data->current_fullscale =
(struct st_sensor_fullscale_avl *)
&press_data->sensor_settings->fs.fs_avl[0];
press_data->current_fullscale =
(struct st_sensor_fullscale_avl *)
&press_data->sensor_settings->fs.fs_avl[0];
press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;

4
drivers/iio/pressure/st_pressure_i2c.c
View File

@ -32,6 +32,10 @@ static const struct of_device_id st_press_of_match[] = {
.compatible = "st,lps331ap-press",
.data = LPS331AP_PRESS_DEV_NAME,
},
{
.compatible = "st,lps22hb-press",
.data = LPS22HB_PRESS_DEV_NAME,
},
{},
};
MODULE_DEVICE_TABLE(of, st_press_of_match);

1
drivers/iio/pressure/st_pressure_spi.c
View File

@ -50,6 +50,7 @@ static const struct spi_device_id st_press_id_table[] = {
{ LPS001WP_PRESS_DEV_NAME },
{ LPS25H_PRESS_DEV_NAME },
{ LPS331AP_PRESS_DEV_NAME },
{ LPS22HB_PRESS_DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(spi, st_press_id_table);