diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2015-05-19 15:37:02 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-06-07 17:58:28 +0100 |
| commit | 4861a007bfd71a9fc0a83cc7fad41dda9bf8b5b7 (patch) | |
| tree | da2f7a5ecfcac29630e81ec33383b8f43003c1bf /drivers/iio | |
| parent | bf04c1a367e3d52b2e071cc7c7047c27dc1c3c5f (diff) | |
| download | linux-4861a007bfd71a9fc0a83cc7fad41dda9bf8b5b7.tar.gz linux-4861a007bfd71a9fc0a83cc7fad41dda9bf8b5b7.tar.xz | |
iio: st_accel: support 8bit channel data
Some sensors like the LIS331DL only support 8bit data by a single
register per axis. These utilize the MSB byte. Make it possible
to register these apropriately.
A oneliner change is needed in the ST sensors core to handle 8bit
reads as this is the first supported 8bit sensor.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/st_accel_core.c | 16 | ||||
| -rw-r--r-- | drivers/iio/common/st_sensors/st_sensors_core.c | 4 |
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index 58d1d13d552a..ad19fb4304df 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -153,6 +153,22 @@ #define ST_ACCEL_4_IG1_EN_MASK 0x08 #define ST_ACCEL_4_MULTIREAD_BIT true +static const struct iio_chan_spec st_accel_8bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8, + ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8, + ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8, + ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + static const struct iio_chan_spec st_accel_12bit_channels[] = { ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index 1255b157c71c..bf4b13f9defc 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -433,7 +433,9 @@ static int st_sensors_read_axis_data(struct iio_dev *indio_dev, if (err < 0) goto st_sensors_free_memory; - if (byte_for_channel == 2) + if (byte_for_channel == 1) + *data = (s8)*outdata; + else if (byte_for_channel == 2) *data = (s16)get_unaligned_le16(outdata); else if (byte_for_channel == 3) *data = (s32)st_sensors_get_unaligned_le24(outdata); |