Message ID | 20221208071911.2405922-6-carlos.song@nxp.com (mailing list archive) |
---|---|
State | Accepted |
Headers | show |
Series | iio: imu: fxos8700: fix few bugs in data readback and mode set | expand |
On Thu, 8 Dec 2022 15:19:09 +0800 carlos.song@nxp.com wrote: > From: Carlos Song <carlos.song@nxp.com> > > When device is in active mode, it fails to set an ACCEL full-scale > range(2g/4g/8g) in FXOS8700_XYZ_DATA_CFG. This is not align with the > datasheet, but it is a fxos8700 chip behavier. > > Keep the device in standby mode before setting ACCEL full-scale range > into FXOS8700_XYZ_DATA_CFG in chip initialization phase and setting > scale phase. > > Fixes: 84e5ddd5c46e ("iio: imu: Add support for the FXOS8700 IMU") > Signed-off-by: Carlos Song <carlos.song@nxp.com> Applied to the fixes-togreg branch of iio.git and marked for stable inclusion. Thanks, Jonathan > --- > Changes for V2: > - Rework commit log and comment > - Using regmap_write() instead of regmap_update_bits() for readability > > diff --git a/drivers/iio/imu/fxos8700_core.c b/drivers/iio/imu/fxos8700_core.c > index d2e784628820..773f62203bf0 100644 > --- a/drivers/iio/imu/fxos8700_core.c > +++ b/drivers/iio/imu/fxos8700_core.c > @@ -345,7 +345,8 @@ static int fxos8700_set_active_mode(struct fxos8700_data *data, > static int fxos8700_set_scale(struct fxos8700_data *data, > enum fxos8700_sensor t, int uscale) > { > - int i; > + int i, ret, val; > + bool active_mode; > static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale); > struct device *dev = regmap_get_device(data->regmap); > > @@ -354,6 +355,25 @@ static int fxos8700_set_scale(struct fxos8700_data *data, > return -EINVAL; > } > > + /* > + * When device is in active mode, it failed to set an ACCEL > + * full-scale range(2g/4g/8g) in FXOS8700_XYZ_DATA_CFG. > + * This is not align with the datasheet, but it is a fxos8700 > + * chip behavier. Set the device in standby mode before setting > + * an ACCEL full-scale range. > + */ > + ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val); > + if (ret) > + return ret; > + > + active_mode = val & FXOS8700_ACTIVE; > + if (active_mode) { > + ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, > + val & ~FXOS8700_ACTIVE); > + if (ret) > + return ret; > + } > + > for (i = 0; i < scale_num; i++) > if (fxos8700_accel_scale[i].uscale == uscale) > break; > @@ -361,8 +381,12 @@ static int fxos8700_set_scale(struct fxos8700_data *data, > if (i == scale_num) > return -EINVAL; > > - return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, > + ret = regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, > fxos8700_accel_scale[i].bits); > + if (ret) > + return ret; > + return regmap_write(data->regmap, FXOS8700_CTRL_REG1, > + active_mode); > } > > static int fxos8700_get_scale(struct fxos8700_data *data, > @@ -631,14 +655,17 @@ static int fxos8700_chip_init(struct fxos8700_data *data, bool use_spi) > if (ret) > return ret; > > - /* Max ODR (800Hz individual or 400Hz hybrid), active mode */ > - ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, > - FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE); > + /* > + * Set max full-scale range (+/-8G) for ACCEL sensor in chip > + * initialization then activate the device. > + */ > + ret = regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G); > if (ret) > return ret; > > - /* Set for max full-scale range (+/-8G) */ > - return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G); > + /* Max ODR (800Hz individual or 400Hz hybrid), active mode */ > + return regmap_write(data->regmap, FXOS8700_CTRL_REG1, > + FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE); > } > > static void fxos8700_chip_uninit(void *data)
diff --git a/drivers/iio/imu/fxos8700_core.c b/drivers/iio/imu/fxos8700_core.c index d2e784628820..773f62203bf0 100644 --- a/drivers/iio/imu/fxos8700_core.c +++ b/drivers/iio/imu/fxos8700_core.c @@ -345,7 +345,8 @@ static int fxos8700_set_active_mode(struct fxos8700_data *data, static int fxos8700_set_scale(struct fxos8700_data *data, enum fxos8700_sensor t, int uscale) { - int i; + int i, ret, val; + bool active_mode; static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale); struct device *dev = regmap_get_device(data->regmap); @@ -354,6 +355,25 @@ static int fxos8700_set_scale(struct fxos8700_data *data, return -EINVAL; } + /* + * When device is in active mode, it failed to set an ACCEL + * full-scale range(2g/4g/8g) in FXOS8700_XYZ_DATA_CFG. + * This is not align with the datasheet, but it is a fxos8700 + * chip behavier. Set the device in standby mode before setting + * an ACCEL full-scale range. + */ + ret = regmap_read(data->regmap, FXOS8700_CTRL_REG1, &val); + if (ret) + return ret; + + active_mode = val & FXOS8700_ACTIVE; + if (active_mode) { + ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, + val & ~FXOS8700_ACTIVE); + if (ret) + return ret; + } + for (i = 0; i < scale_num; i++) if (fxos8700_accel_scale[i].uscale == uscale) break; @@ -361,8 +381,12 @@ static int fxos8700_set_scale(struct fxos8700_data *data, if (i == scale_num) return -EINVAL; - return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, + ret = regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, fxos8700_accel_scale[i].bits); + if (ret) + return ret; + return regmap_write(data->regmap, FXOS8700_CTRL_REG1, + active_mode); } static int fxos8700_get_scale(struct fxos8700_data *data, @@ -631,14 +655,17 @@ static int fxos8700_chip_init(struct fxos8700_data *data, bool use_spi) if (ret) return ret; - /* Max ODR (800Hz individual or 400Hz hybrid), active mode */ - ret = regmap_write(data->regmap, FXOS8700_CTRL_REG1, - FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE); + /* + * Set max full-scale range (+/-8G) for ACCEL sensor in chip + * initialization then activate the device. + */ + ret = regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G); if (ret) return ret; - /* Set for max full-scale range (+/-8G) */ - return regmap_write(data->regmap, FXOS8700_XYZ_DATA_CFG, MODE_8G); + /* Max ODR (800Hz individual or 400Hz hybrid), active mode */ + return regmap_write(data->regmap, FXOS8700_CTRL_REG1, + FXOS8700_CTRL_ODR_MAX | FXOS8700_ACTIVE); } static void fxos8700_chip_uninit(void *data)