Re: [PATCH 2/3] iio: imu: st_lsm6dsx: move fs_table in st_lsm6dsx_sensor_settings

Martin Kepplinger
2019-07-16T09:13:35Z

> Move fs_table in st_lsm6dsx_sensor_settings in order to support
> sensors with different gain maps. This is a preliminary patch to add
> support for LSM9DS1 sensor to st_lsm6dsx driver
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 2 +
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 175 +++++++++++++++----
> 2 files changed, 144 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> index 3a89f3f6e2c7..ab1c66615d67 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> @@ -201,6 +201,7 @@ struct st_lsm6dsx_ext_dev_settings {
> * @max_fifo_size: Sensor max fifo length in FIFO words.
> * @id: List of hw id/device name supported by the driver configuration.
> * @odr_table: Hw sensors odr table (Hz + val).
> + * @fs_table: Hw sensors gain table (gain + val).
> * @decimator: List of decimator register info (addr + mask).
> * @batch: List of FIFO batching register info (addr + mask).
> * @fifo_ops: Sensor hw FIFO parameters.
> @@ -215,6 +216,7 @@ struct st_lsm6dsx_settings {
> const char *name;
> } id[ST_LSM6DSX_MAX_ID];
> struct st_lsm6dsx_odr_table_entry odr_table[2];
> + struct st_lsm6dsx_fs_table_entry fs_table[2];
> struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID];
> struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID];
> struct st_lsm6dsx_fifo_ops fifo_ops;
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index b3c6c9792913..9aa109428a52 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -69,29 +69,6 @@
> #define ST_LSM6DSX_REG_GYRO_OUT_Y_L_ADDR 0x24
> #define ST_LSM6DSX_REG_GYRO_OUT_Z_L_ADDR 0x26
>
> -static const struct st_lsm6dsx_fs_table_entry st_lsm6dsx_fs_table[] = {
> - [ST_LSM6DSX_ID_ACC] = {
> - .reg = {
> - .addr = 0x10,
> - .mask = GENMASK(3, 2),
> - },
> - .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> - .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> - .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> - .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> - },
> - [ST_LSM6DSX_ID_GYRO] = {
> - .reg = {
> - .addr = 0x11,
> - .mask = GENMASK(3, 2),
> - },
> - .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> - .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> - .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> - .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> - }
> -};
> -
> static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> {
> .wai = 0x69,
> @@ -128,6 +105,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .decimator = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x08,
> @@ -204,6 +203,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .decimator = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x08,
> @@ -289,6 +310,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .decimator = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x08,
> @@ -368,6 +411,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .batch = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x09,
> @@ -462,6 +527,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .batch = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x09,
> @@ -530,6 +617,28 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
> .odr_avl[5] = { 416, 0x06 },
> },
> },
> + .fs_table = {
> + [ST_LSM6DSX_ID_ACC] = {
> + .reg = {
> + .addr = 0x10,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_G_TO_M_S_2(61), 0x0 },
> + .fs_avl[1] = { IIO_G_TO_M_S_2(122), 0x2 },
> + .fs_avl[2] = { IIO_G_TO_M_S_2(244), 0x3 },
> + .fs_avl[3] = { IIO_G_TO_M_S_2(488), 0x1 },
> + },
> + [ST_LSM6DSX_ID_GYRO] = {
> + .reg = {
> + .addr = 0x11,
> + .mask = GENMASK(3, 2),
> + },
> + .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750), 0x0 },
> + .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500), 0x1 },
> + .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000), 0x2 },
> + .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000), 0x3 },
> + },
> + },
> .batch = {
> [ST_LSM6DSX_ID_ACC] = {
> .addr = 0x09,
> @@ -665,23 +774,22 @@ static int st_lsm6dsx_check_whoami(struct st_lsm6dsx_hw *hw, int id,
> static int st_lsm6dsx_set_full_scale(struct st_lsm6dsx_sensor *sensor,
> u32 gain)
> {
> - struct st_lsm6dsx_hw *hw = sensor->hw;
> - const struct st_lsm6dsx_reg *reg;
> + const struct st_lsm6dsx_fs_table_entry *fs_table;
> unsigned int data;
> int i, err;
> - u8 val;
>
> + fs_table = &sensor->hw->settings->fs_table[sensor->id];
> for (i = 0; i < ST_LSM6DSX_FS_LIST_SIZE; i++)
> - if (st_lsm6dsx_fs_table[sensor->id].fs_avl[i].gain == gain)
> + if (fs_table->fs_avl[i].gain == gain)
> break;
>
> if (i == ST_LSM6DSX_FS_LIST_SIZE)
> return -EINVAL;
>
> - val = st_lsm6dsx_fs_table[sensor->id].fs_avl[i].val;
> - reg = &st_lsm6dsx_fs_table[sensor->id].reg;
> - data = ST_LSM6DSX_SHIFT_VAL(val, reg->mask);
> - err = st_lsm6dsx_update_bits_locked(hw, reg->addr, reg->mask, data);
> + data = ST_LSM6DSX_SHIFT_VAL(fs_table->fs_avl[i].val,
> + fs_table->reg.mask);
> + err = st_lsm6dsx_update_bits_locked(sensor->hw, fs_table->reg.addr,
> + fs_table->reg.mask, data);
> if (err < 0)
> return err;
>
> @@ -934,11 +1042,12 @@ static ssize_t st_lsm6dsx_sysfs_scale_avail(struct device *dev,
> {
> struct st_lsm6dsx_sensor *sensor = iio_priv(dev_get_drvdata(dev));
> enum st_lsm6dsx_sensor_id id = sensor->id;
> + struct st_lsm6dsx_hw *hw = sensor->hw;
> int i, len = 0;
>
> for (i = 0; i < ST_LSM6DSX_FS_LIST_SIZE; i++)
> len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
> - st_lsm6dsx_fs_table[id].fs_avl[i].gain);
> + hw->settings->fs_table[id].fs_avl[i].gain);
> buf[len - 1] = '\n';
>
> return len;
> @@ -1173,7 +1282,7 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
> sensor->id = id;
> sensor->hw = hw;
> sensor->odr = hw->settings->odr_table[id].odr_avl[0].hz;
> - sensor->gain = st_lsm6dsx_fs_table[id].fs_avl[0].gain;
> + sensor->gain = hw->settings->fs_table[id].fs_avl[0].gain;
> sensor->watermark = 1;
>
> switch (id) {
>

Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm>