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>

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index 70230a159b46ee5a2a2a6ff24ab8c7497f706ddf..274cdecc535b012c434fea6f3ecb389d7f820de5 100644 (file)
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -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,
                                },
                        },
                },