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@xxxxxx>
---
drivers/iio/accel/st_accel_core.c | 3 ++
drivers/iio/common/st_sensors/st_sensors_buffer.c | 33 ++++++++++-----------
drivers/iio/common/st_sensors/st_sensors_core.c | 19 ++++++++----
drivers/iio/gyro/st_gyro_core.c | 3 ++
drivers/iio/magnetometer/st_magn_core.c | 3 ++
include/linux/iio/common/st_sensors.h | 4 +--
6 files changed, 40 insertions(+), 25 deletions(-)
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
index 40236d5..4aec121 100644
--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -26,6 +26,8 @@
#include <linux/iio/common/st_sensors.h>
#include "st_accel.h"
+#define ST_ACCEL_NUMBER_DATA_CHANNELS 3
+
/* DEFAULT VALUE FOR SENSORS */
#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
@@ -454,6 +456,7 @@ int st_accel_common_probe(struct iio_dev *indio_dev)
if (err < 0)
goto st_accel_common_probe_error;
+ adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
adata->multiread_bit = adata->sensor->multi_read_bit;
indio_dev->channels = adata->sensor->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c
index 09b236d..7b7417a 100644
--- a/drivers/iio/common/st_sensors/st_sensors_buffer.c
+++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c
@@ -25,10 +25,13 @@
int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf)
{
int i, n = 0, len;
- u8 addr[ST_SENSORS_NUMBER_DATA_CHANNELS];
struct st_sensor_data *sdata = iio_priv(indio_dev);
+ unsigned int num_data_channels = sdata->num_data_channels;
+ unsigned int byte_for_channel =
+ indio_dev->channels[0].scan_type.storagebits >> 3;
+ u8 addr[num_data_channels];
- for (i = 0; i < ST_SENSORS_NUMBER_DATA_CHANNELS; i++) {
+ for (i = 0; i < num_data_channels; i++) {
if (test_bit(i, indio_dev->active_scan_mask)) {
addr[n] = indio_dev->channels[i].address;
n++;
@@ -37,47 +40,41 @@ int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf)
switch (n) {
case 1:
len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
- addr[0], ST_SENSORS_BYTE_FOR_CHANNEL, buf,
- sdata->multiread_bit);
+ addr[0], byte_for_channel, buf, sdata->multiread_bit);
break;
case 2:
- if ((addr[1] - addr[0]) == ST_SENSORS_BYTE_FOR_CHANNEL) {
+ if ((addr[1] - addr[0]) == byte_for_channel) {
len = sdata->tf->read_multiple_byte(&sdata->tb,
- sdata->dev, addr[0],
- ST_SENSORS_BYTE_FOR_CHANNEL*n,
- buf, sdata->multiread_bit);
+ sdata->dev, addr[0], byte_for_channel * n,
+ buf, sdata->multiread_bit);
} else {
- u8 rx_array[ST_SENSORS_BYTE_FOR_CHANNEL*
- ST_SENSORS_NUMBER_DATA_CHANNELS];
+ u8 rx_array[byte_for_channel * num_data_channels];
len = sdata->tf->read_multiple_byte(&sdata->tb,
sdata->dev, addr[0],
- ST_SENSORS_BYTE_FOR_CHANNEL*
- ST_SENSORS_NUMBER_DATA_CHANNELS,
+ byte_for_channel * num_data_channels,
rx_array, sdata->multiread_bit);
if (len < 0)
goto read_data_channels_error;
- for (i = 0; i < n * ST_SENSORS_NUMBER_DATA_CHANNELS;
- i++) {
+ for (i = 0; i < n * num_data_channels; i++) {
if (i < n)
buf[i] = rx_array[i];
else
buf[i] = rx_array[n + i];
}
- len = ST_SENSORS_BYTE_FOR_CHANNEL*n;
+ len = byte_for_channel * n;
}
break;
case 3:
len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
- addr[0], ST_SENSORS_BYTE_FOR_CHANNEL*
- ST_SENSORS_NUMBER_DATA_CHANNELS,
+ addr[0], byte_for_channel * num_data_channels,
buf, sdata->multiread_bit);
break;
default:
len = -EINVAL;
goto read_data_channels_error;
}
- if (len != ST_SENSORS_BYTE_FOR_CHANNEL*n) {
+ if (len != byte_for_channel * n) {
len = -EIO;
goto read_data_channels_error;
}
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index ed9bc8a..5c0b66f 100644
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -20,6 +20,11 @@
#define ST_SENSORS_WAI_ADDRESS 0x0f
+static inline u32 st_sensors_get_unaligned_le24(const u8 *p)
+{
+ return ((s32)((p[0] | p[1] << 8 | p[2] << 16) << 8) >> 8);
+}
+
static int st_sensors_write_data_with_mask(struct iio_dev *indio_dev,
u8 reg_addr, u8 mask, u8 data)
{
@@ -273,19 +278,23 @@ st_sensors_match_scale_error:
EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain);
static int st_sensors_read_axis_data(struct iio_dev *indio_dev,
- u8 ch_addr, int *data)
+ struct iio_chan_spec const *ch, int *data)
{
int err;
- u8 outdata[ST_SENSORS_BYTE_FOR_CHANNEL];
struct st_sensor_data *sdata = iio_priv(indio_dev);
+ unsigned int byte_for_channel = ch->scan_type.storagebits >> 3;
+ u8 outdata[byte_for_channel];
err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev,
- ch_addr, ST_SENSORS_BYTE_FOR_CHANNEL,
+ ch->address, byte_for_channel,
outdata, sdata->multiread_bit);
if (err < 0)
goto read_error;
- *data = (s16)get_unaligned_le16(outdata);
+ 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);
read_error:
return err;
@@ -307,7 +316,7 @@ int st_sensors_read_info_raw(struct iio_dev *indio_dev,
goto read_error;
msleep((sdata->sensor->bootime * 1000) / sdata->odr);
- err = st_sensors_read_axis_data(indio_dev, ch->address, val);
+ err = st_sensors_read_axis_data(indio_dev, ch, val);
if (err < 0)
goto read_error;
diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c
index 9bae46b..f9ed348 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;
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 715d616..ebfe8f1 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -26,6 +26,8 @@
#include <linux/iio/common/st_sensors.h>
#include "st_magn.h"
+#define ST_MAGN_NUMBER_DATA_CHANNELS 3
+
/* DEFAULT VALUE FOR SENSORS */
#define ST_MAGN_DEFAULT_OUT_X_L_ADDR 0X04
#define ST_MAGN_DEFAULT_OUT_Y_L_ADDR 0X08
@@ -356,6 +358,7 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
if (err < 0)
goto st_magn_common_probe_error;
+ mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
mdata->multiread_bit = mdata->sensor->multi_read_bit;
indio_dev->channels = mdata->sensor->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
index 5ffd763..72b2694 100644
--- a/include/linux/iio/common/st_sensors.h
+++ b/include/linux/iio/common/st_sensors.h
@@ -24,9 +24,7 @@
#define ST_SENSORS_FULLSCALE_AVL_MAX 10
#define ST_SENSORS_NUMBER_ALL_CHANNELS 4
-#define ST_SENSORS_NUMBER_DATA_CHANNELS 3
#define ST_SENSORS_ENABLE_ALL_AXIS 0x07
-#define ST_SENSORS_BYTE_FOR_CHANNEL 2
#define ST_SENSORS_SCAN_X 0
#define ST_SENSORS_SCAN_Y 1
#define ST_SENSORS_SCAN_Z 2
@@ -202,6 +200,7 @@ struct st_sensors {
* @multiread_bit: Use or not particular bit for [I2C/SPI] multiread.
* @buffer_data: Data used by buffer part.
* @odr: Output data rate of the sensor [Hz].
+ * num_data_channels: Number of data channels used in buffer.
* @get_irq_data_ready: Function to get the IRQ used for data ready signal.
* @tf: Transfer function structure used by I/O operations.
* @tb: Transfer buffers and mutex used by I/O operations.
@@ -218,6 +217,7 @@ struct st_sensor_data {
char *buffer_data;
unsigned int odr;
+ unsigned int num_data_channels;
unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev);
--
1.7.9.5
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