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iio:st_pressure:lps22hb: temperature support 

Implement lps22hb temperature sampling channel.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie 2016-06-27 12:38:57 +02:00 committed by Jonathan Cameron
parent 05167cdce0
commit 85d79136d3
1 changed files with 23 additions and 3 deletions
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26
drivers/iio/pressure/st_pressure_core.c
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@ -196,6 +196,10 @@
* See LPS22HB datasheet:
* http://www2.st.com/resource/en/datasheet/lps22hb.pdf
*/
/* LPS22HB temperature sensitivity */
#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL
#define ST_PRESS_LPS22HB_WAI_EXP 0xb1
#define ST_PRESS_LPS22HB_ODR_ADDR 0x10
#define ST_PRESS_LPS22HB_ODR_MASK 0x70
@ -307,7 +311,22 @@ static const struct iio_chan_spec st_press_lps22hb_channels[] = {
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
.modified = 0,
},
IIO_CHAN_SOFT_TIMESTAMP(1)
{
.type = IIO_TEMP,
.address = ST_TEMP_1_OUT_L_ADDR,
.scan_index = 1,
.scan_type = {
.sign = 's',
.realbits = 16,
.storagebits = 16,
.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),
},
IIO_CHAN_SOFT_TIMESTAMP(2)
};
static const struct st_sensor_settings st_press_sensors_settings[] = {
@ -494,12 +513,13 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
.fs = {
.fs_avl = {
/*
* Sensitivity values as defined in table 3 of
* LPS22HB datasheet.
* Pressure and temperature sensitivity values
* as defined in table 3 of LPS22HB datasheet.
*/
[0] = {
.num = ST_PRESS_FS_AVL_1260MB,
.gain = ST_PRESS_KPASCAL_NANO_SCALE,
.gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
},
},
},