iio:common: Removed stuff macros, added num_data_channels on st_sensors struct and added support on one-shot sysfs reads to 3 byte channel

This patch introduce num_data_channels variable on st_sensors struct
to manage different type of channels (size or number) in
st_sensors_get_buffer_element function.
Removed ST_SENSORS_NUMBER_DATA_CHANNELS and ST_SENSORS_BYTE_FOR_CHANNEL
and used struct iio_chan_spec const *ch to catch data.
Added 3 byte channel data support on one-shot reads.

Signed-off-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
index 9bae46bcccee..f9ed3488c314 100644
--- a/drivers/iio/gyro/st_gyro_core.c
+++ b/drivers/iio/gyro/st_gyro_core.c
@@ -27,6 +27,8 @@
 #include <linux/iio/common/st_sensors.h>
 #include "st_gyro.h"
 
+#define ST_GYRO_NUMBER_DATA_CHANNELS            3
+
 /* DEFAULT VALUE FOR SENSORS */
 #define ST_GYRO_DEFAULT_OUT_X_L_ADDR            0x28
 #define ST_GYRO_DEFAULT_OUT_Y_L_ADDR            0x2a
@@ -313,6 +315,7 @@ int st_gyro_common_probe(struct iio_dev *indio_dev)
         if (err < 0)
                 goto st_gyro_common_probe_error;
 
+        gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS;
         gdata->multiread_bit = gdata->sensor->multi_read_bit;
         indio_dev->channels = gdata->sensor->ch;
         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;