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iio: cros_ec: Add calibscale for 3d MEMS 

Add calibration scale support to accel, gyro and magnetometer.

Check on eve with current firmware, check reading calibscale returns 1.0,
check with newer firmware values are applied.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Gwendal Grignou 2019-07-18 16:28:24 -07:00 committed by Jonathan Cameron
parent 50e5bae0c1
commit ed1f2e85da
5 changed files with 57 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
View File

@ -63,10 +63,35 @@ static int cros_ec_sensors_read(struct iio_dev *indio_dev,
/* Save values */
for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
st->core.calib[i] =
st->core.calib[i].offset =
st->core.resp->sensor_offset.offset[i];
ret = IIO_VAL_INT;
*val = st->core.calib[idx];
*val = st->core.calib[idx].offset;
break;
case IIO_CHAN_INFO_CALIBSCALE:
st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_SCALE;
st->core.param.sensor_offset.flags = 0;
ret = cros_ec_motion_send_host_cmd(&st->core, 0);
if (ret == -EPROTO) {
/* Reading calibscale is not supported on older EC. */
*val = 1;
*val2 = 0;
ret = IIO_VAL_INT_PLUS_MICRO;
break;
} else if (ret) {
break;
}
/* Save values */
for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
st->core.calib[i].scale =
st->core.resp->sensor_scale.scale[i];
*val = st->core.calib[idx].scale >> 15;
*val2 = ((st->core.calib[idx].scale & 0x7FFF) * 1000000LL) /
MOTION_SENSE_DEFAULT_SCALE;
ret = IIO_VAL_INT_PLUS_MICRO;
break;
case IIO_CHAN_INFO_SCALE:
st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
@ -134,7 +159,7 @@ static int cros_ec_sensors_write(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_CALIBBIAS:
st->core.calib[idx] = val;
st->core.calib[idx].offset = val;
/* Send to EC for each axis, even if not complete */
st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
@ -142,10 +167,25 @@ static int cros_ec_sensors_write(struct iio_dev *indio_dev,
MOTION_SENSE_SET_OFFSET;
for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
st->core.param.sensor_offset.offset[i] =
st->core.calib[i];
st->core.calib[i].offset;
st->core.param.sensor_offset.temp =
EC_MOTION_SENSE_INVALID_CALIB_TEMP;
ret = cros_ec_motion_send_host_cmd(&st->core, 0);
break;
case IIO_CHAN_INFO_CALIBSCALE:
st->core.calib[idx].scale = val;
/* Send to EC for each axis, even if not complete */
st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_SCALE;
st->core.param.sensor_offset.flags =
MOTION_SENSE_SET_OFFSET;
for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
st->core.param.sensor_scale.scale[i] =
st->core.calib[i].scale;
st->core.param.sensor_scale.temp =
EC_MOTION_SENSE_INVALID_CALIB_TEMP;
ret = cros_ec_motion_send_host_cmd(&st->core, 0);
break;
case IIO_CHAN_INFO_SCALE:
@ -206,7 +246,8 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
/* Common part */
channel->info_mask_separate =
BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_CALIBBIAS);
BIT(IIO_CHAN_INFO_CALIBBIAS) |
BIT(IIO_CHAN_INFO_CALIBSCALE);
channel->info_mask_shared_by_all =
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_FREQUENCY) |

2
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
View File

@ -118,7 +118,7 @@ static ssize_t cros_ec_sensors_calibrate(struct iio_dev *indio_dev,
} else {
/* Save values */
for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
st->calib[i] = st->resp->perform_calib.offset[i];
st->calib[i].offset = st->resp->perform_calib.offset[i];
}
mutex_unlock(&st->cmd_lock);

12
drivers/iio/light/cros_ec_light_prox.c
View File

@ -88,9 +88,10 @@ static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
}
/* Save values */
st->core.calib[0] = st->core.resp->sensor_offset.offset[0];
st->core.calib[0].offset =
st->core.resp->sensor_offset.offset[0];
*val = st->core.calib[idx];
*val = st->core.calib[idx].offset;
break;
case IIO_CHAN_INFO_CALIBSCALE:
/*
@ -134,11 +135,12 @@ static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_CALIBBIAS:
st->core.calib[idx] = val;
st->core.calib[idx].offset = val;
/* Send to EC for each axis, even if not complete */
st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
st->core.param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
st->core.param.sensor_offset.offset[0] = st->core.calib[0];
st->core.param.sensor_offset.offset[0] =
st->core.calib[0].offset;
st->core.param.sensor_offset.temp =
EC_MOTION_SENSE_INVALID_CALIB_TEMP;
if (cros_ec_motion_send_host_cmd(&st->core, 0))
@ -205,8 +207,6 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
channel->ext_info = cros_ec_sensors_ext_info;
channel->scan_type.sign = 'u';
state->core.calib[0] = 0;
/* Sensor specific */
switch (state->core.type) {
case MOTIONSENSE_TYPE_LIGHT:

2
drivers/iio/pressure/cros_ec_baro.c
View File

@ -152,8 +152,6 @@ static int cros_ec_baro_probe(struct platform_device *pdev)
channel->ext_info = cros_ec_sensors_ext_info;
channel->scan_type.sign = 'u';
state->core.calib[0] = 0;
/* Sensor specific */
switch (state->core.type) {
case MOTIONSENSE_TYPE_BARO:

5
include/linux/iio/common/cros_ec_sensors_core.h
View File

@ -62,7 +62,10 @@ struct cros_ec_sensors_core_state {
enum motionsensor_type type;
enum motionsensor_location loc;
s16 calib[CROS_EC_SENSOR_MAX_AXIS];
struct calib_data {
s16 offset;
u16 scale;
} calib[CROS_EC_SENSOR_MAX_AXIS];
u8 samples[CROS_EC_SAMPLE_SIZE];