On Mon, 18 Nov 2019 11:34:06 +0100
Jean-Baptiste Maneyrol <jmaneyrol@xxxxxxxxxxxxxx> wrote:
> Add support of temperature data in fifo for all chips.
> Enable unification of scan elements for icm20602.
> Add macros for generating scan elements with and without temp.
>
> Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@xxxxxxxxxxxxxx>
Looks fine to me. I'll pick up once we've worked out what
we are doing with patch 1.
Remind me if I seem to have lost it.
Thanks,
Jonathan
> ---
> drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 194 +++++++-----------
> drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 22 +-
> drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 6 +-
> drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c | 3 +
> 4 files changed, 84 insertions(+), 141 deletions(-)
>
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> index 268240644adf..7c2f6951364d 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> @@ -104,6 +104,7 @@ static const struct inv_mpu6050_chip_config chip_config_6050 = {
> .divider = INV_MPU6050_FIFO_RATE_TO_DIVIDER(INV_MPU6050_INIT_FIFO_RATE),
> .gyro_fifo_enable = false,
> .accl_fifo_enable = false,
> + .temp_fifo_enable = false,
> .magn_fifo_enable = false,
> .accl_fs = INV_MPU6050_FS_02G,
> .user_ctrl = 0,
> @@ -856,19 +857,27 @@ static const struct iio_chan_spec_ext_info inv_ext_info[] = {
> .ext_info = inv_ext_info, \
> }
>
> +#define INV_MPU6050_TEMP_CHAN(_index) \
> + { \
> + .type = IIO_TEMP, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \
> + | BIT(IIO_CHAN_INFO_OFFSET) \
> + | BIT(IIO_CHAN_INFO_SCALE), \
> + .scan_index = _index, \
> + .scan_type = { \
> + .sign = 's', \
> + .realbits = 16, \
> + .storagebits = 16, \
> + .shift = 0, \
> + .endianness = IIO_BE, \
> + }, \
> + }
> +
> static const struct iio_chan_spec inv_mpu_channels[] = {
> IIO_CHAN_SOFT_TIMESTAMP(INV_MPU6050_SCAN_TIMESTAMP),
> - /*
> - * Note that temperature should only be via polled reading only,
> - * not the final scan elements output.
> - */
> - {
> - .type = IIO_TEMP,
> - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
> - | BIT(IIO_CHAN_INFO_OFFSET)
> - | BIT(IIO_CHAN_INFO_SCALE),
> - .scan_index = -1,
> - },
> +
> + INV_MPU6050_TEMP_CHAN(INV_MPU6050_SCAN_TEMP),
> +
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z),
> @@ -878,22 +887,31 @@ static const struct iio_chan_spec inv_mpu_channels[] = {
> INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z),
> };
>
> +#define INV_MPU6050_SCAN_MASK_3AXIS_ACCEL \
> + (BIT(INV_MPU6050_SCAN_ACCL_X) \
> + | BIT(INV_MPU6050_SCAN_ACCL_Y) \
> + | BIT(INV_MPU6050_SCAN_ACCL_Z))
> +
> +#define INV_MPU6050_SCAN_MASK_3AXIS_GYRO \
> + (BIT(INV_MPU6050_SCAN_GYRO_X) \
> + | BIT(INV_MPU6050_SCAN_GYRO_Y) \
> + | BIT(INV_MPU6050_SCAN_GYRO_Z))
> +
> +#define INV_MPU6050_SCAN_MASK_TEMP (BIT(INV_MPU6050_SCAN_TEMP))
> +
> +/* generate scan mask and a duplicate with temperature enabled */
> +#define INV_MPU6050_SCAN_MASK_DUP_TEMP(_mask) \
> + (_mask), \
> + (_mask) | INV_MPU6050_SCAN_MASK_TEMP
> +
> static const unsigned long inv_mpu_scan_masks[] = {
> /* 3-axis accel */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL),
> /* 3-axis gyro */
> - BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_GYRO),
> /* 6-axis accel + gyro */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z)
> - | BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL
> + | INV_MPU6050_SCAN_MASK_3AXIS_GYRO),
> 0,
> };
>
> @@ -917,17 +935,9 @@ static const unsigned long inv_mpu_scan_masks[] = {
>
> static const struct iio_chan_spec inv_mpu9150_channels[] = {
> IIO_CHAN_SOFT_TIMESTAMP(INV_MPU9X50_SCAN_TIMESTAMP),
> - /*
> - * Note that temperature should only be via polled reading only,
> - * not the final scan elements output.
> - */
> - {
> - .type = IIO_TEMP,
> - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
> - | BIT(IIO_CHAN_INFO_OFFSET)
> - | BIT(IIO_CHAN_INFO_SCALE),
> - .scan_index = -1,
> - },
> +
> + INV_MPU6050_TEMP_CHAN(INV_MPU6050_SCAN_TEMP),
> +
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z),
> @@ -944,17 +954,9 @@ static const struct iio_chan_spec inv_mpu9150_channels[] = {
>
> static const struct iio_chan_spec inv_mpu9250_channels[] = {
> IIO_CHAN_SOFT_TIMESTAMP(INV_MPU9X50_SCAN_TIMESTAMP),
> - /*
> - * Note that temperature should only be via polled reading only,
> - * not the final scan elements output.
> - */
> - {
> - .type = IIO_TEMP,
> - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
> - | BIT(IIO_CHAN_INFO_OFFSET)
> - | BIT(IIO_CHAN_INFO_SCALE),
> - .scan_index = -1,
> - },
> +
> + INV_MPU6050_TEMP_CHAN(INV_MPU6050_SCAN_TEMP),
> +
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y),
> INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z),
> @@ -969,98 +971,42 @@ static const struct iio_chan_spec inv_mpu9250_channels[] = {
> INV_MPU9X50_MAGN_CHAN(IIO_MOD_Z, 16, INV_MPU9X50_SCAN_MAGN_Z),
> };
>
> +#define INV_MPU9X50_SCAN_MASK_3AXIS_MAGN \
> + (BIT(INV_MPU9X50_SCAN_MAGN_X) \
> + | BIT(INV_MPU9X50_SCAN_MAGN_Y) \
> + | BIT(INV_MPU9X50_SCAN_MAGN_Z))
> +
> static const unsigned long inv_mpu9x50_scan_masks[] = {
> /* 3-axis accel */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL),
> /* 3-axis gyro */
> - BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_GYRO),
> /* 3-axis magn */
> - BIT(INV_MPU9X50_SCAN_MAGN_X)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Y)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU9X50_SCAN_MASK_3AXIS_MAGN),
> /* 6-axis accel + gyro */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z)
> - | BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL
> + | INV_MPU6050_SCAN_MASK_3AXIS_GYRO),
> /* 6-axis accel + magn */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z)
> - | BIT(INV_MPU9X50_SCAN_MAGN_X)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Y)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL
> + | INV_MPU9X50_SCAN_MASK_3AXIS_MAGN),
> /* 6-axis gyro + magn */
> - BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z)
> - | BIT(INV_MPU9X50_SCAN_MAGN_X)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Y)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_GYRO
> + | INV_MPU9X50_SCAN_MASK_3AXIS_MAGN),
> /* 9-axis accel + gyro + magn */
> - BIT(INV_MPU6050_SCAN_ACCL_X)
> - | BIT(INV_MPU6050_SCAN_ACCL_Y)
> - | BIT(INV_MPU6050_SCAN_ACCL_Z)
> - | BIT(INV_MPU6050_SCAN_GYRO_X)
> - | BIT(INV_MPU6050_SCAN_GYRO_Y)
> - | BIT(INV_MPU6050_SCAN_GYRO_Z)
> - | BIT(INV_MPU9X50_SCAN_MAGN_X)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Y)
> - | BIT(INV_MPU9X50_SCAN_MAGN_Z),
> + INV_MPU6050_SCAN_MASK_DUP_TEMP(INV_MPU6050_SCAN_MASK_3AXIS_ACCEL
> + | INV_MPU6050_SCAN_MASK_3AXIS_GYRO
> + | INV_MPU9X50_SCAN_MASK_3AXIS_MAGN),
> 0,
> };
>
> -static const struct iio_chan_spec inv_icm20602_channels[] = {
> - IIO_CHAN_SOFT_TIMESTAMP(INV_ICM20602_SCAN_TIMESTAMP),
> - {
> - .type = IIO_TEMP,
> - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW)
> - | BIT(IIO_CHAN_INFO_OFFSET)
> - | BIT(IIO_CHAN_INFO_SCALE),
> - .scan_index = INV_ICM20602_SCAN_TEMP,
> - .scan_type = {
> - .sign = 's',
> - .realbits = 16,
> - .storagebits = 16,
> - .shift = 0,
> - .endianness = IIO_BE,
> - },
> - },
> -
> - INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_ICM20602_SCAN_GYRO_X),
> - INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_ICM20602_SCAN_GYRO_Y),
> - INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_ICM20602_SCAN_GYRO_Z),
> -
> - INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_ICM20602_SCAN_ACCL_Y),
> - INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_ICM20602_SCAN_ACCL_X),
> - INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_ICM20602_SCAN_ACCL_Z),
> -};
> -
> static const unsigned long inv_icm20602_scan_masks[] = {
> /* 3-axis accel + temp (mandatory) */
> - BIT(INV_ICM20602_SCAN_ACCL_X)
> - | BIT(INV_ICM20602_SCAN_ACCL_Y)
> - | BIT(INV_ICM20602_SCAN_ACCL_Z)
> - | BIT(INV_ICM20602_SCAN_TEMP),
> + INV_MPU6050_SCAN_MASK_3AXIS_ACCEL | INV_MPU6050_SCAN_MASK_TEMP,
> /* 3-axis gyro + temp (mandatory) */
> - BIT(INV_ICM20602_SCAN_GYRO_X)
> - | BIT(INV_ICM20602_SCAN_GYRO_Y)
> - | BIT(INV_ICM20602_SCAN_GYRO_Z)
> - | BIT(INV_ICM20602_SCAN_TEMP),
> + INV_MPU6050_SCAN_MASK_3AXIS_GYRO | INV_MPU6050_SCAN_MASK_TEMP,
> /* 6-axis accel + gyro + temp (mandatory) */
> - BIT(INV_ICM20602_SCAN_ACCL_X)
> - | BIT(INV_ICM20602_SCAN_ACCL_Y)
> - | BIT(INV_ICM20602_SCAN_ACCL_Z)
> - | BIT(INV_ICM20602_SCAN_GYRO_X)
> - | BIT(INV_ICM20602_SCAN_GYRO_Y)
> - | BIT(INV_ICM20602_SCAN_GYRO_Z)
> - | BIT(INV_ICM20602_SCAN_TEMP),
> + INV_MPU6050_SCAN_MASK_3AXIS_ACCEL | INV_MPU6050_SCAN_MASK_3AXIS_GYRO
> + | INV_MPU6050_SCAN_MASK_TEMP,
> 0,
> };
>
> @@ -1363,8 +1309,8 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
> indio_dev->available_scan_masks = inv_mpu9x50_scan_masks;
> break;
> case INV_ICM20602:
> - indio_dev->channels = inv_icm20602_channels;
> - indio_dev->num_channels = ARRAY_SIZE(inv_icm20602_channels);
> + indio_dev->channels = inv_mpu_channels;
> + indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels);
> indio_dev->available_scan_masks = inv_icm20602_scan_masks;
> break;
> default:
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> index b096e010d4ee..6158fca7f70e 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> @@ -86,6 +86,7 @@ enum inv_devices {
> * @accl_fs: accel full scale range.
> * @accl_fifo_enable: enable accel data output
> * @gyro_fifo_enable: enable gyro data output
> + * @temp_fifo_enable: enable temp data output
> * @magn_fifo_enable: enable magn data output
> * @divider: chip sample rate divider (sample rate divider - 1)
> */
> @@ -95,6 +96,7 @@ struct inv_mpu6050_chip_config {
> unsigned int accl_fs:2;
> unsigned int accl_fifo_enable:1;
> unsigned int gyro_fifo_enable:1;
> + unsigned int temp_fifo_enable:1;
> unsigned int magn_fifo_enable:1;
> u8 divider;
> u8 user_ctrl;
> @@ -184,6 +186,7 @@ struct inv_mpu6050_state {
> #define INV_MPU6050_BIT_SLAVE_2 0x04
> #define INV_MPU6050_BIT_ACCEL_OUT 0x08
> #define INV_MPU6050_BITS_GYRO_OUT 0x70
> +#define INV_MPU6050_BIT_TEMP_OUT 0x80
>
> #define INV_MPU6050_REG_I2C_MST_CTRL 0x24
> #define INV_MPU6050_BITS_I2C_MST_CLK_400KHZ 0x0D
> @@ -268,8 +271,8 @@ struct inv_mpu6050_state {
> /* MPU9X50 9-axis magnetometer */
> #define INV_MPU9X50_BYTES_MAGN 7
>
> -/* ICM20602 FIFO samples include temperature readings */
> -#define INV_ICM20602_BYTES_PER_TEMP_SENSOR 2
> +/* FIFO temperature sample size */
> +#define INV_MPU6050_BYTES_PER_TEMP_SENSOR 2
>
> /* mpu6500 registers */
> #define INV_MPU6500_REG_ACCEL_CONFIG_2 0x1D
> @@ -298,7 +301,7 @@ struct inv_mpu6050_state {
> #define INV_ICM20608_TEMP_OFFSET 8170
> #define INV_ICM20608_TEMP_SCALE 3059976
>
> -/* 6 + 6 + 7 (for MPU9x50) = 19 round up to 24 and plus 8 */
> +/* 6 + 6 + 2 + 7 (for MPU9x50) = 21 round up to 24 and plus 8 */
> #define INV_MPU6050_OUTPUT_DATA_SIZE 32
>
> #define INV_MPU6050_REG_INT_PIN_CFG 0x37
> @@ -344,6 +347,7 @@ enum inv_mpu6050_scan {
> INV_MPU6050_SCAN_ACCL_X,
> INV_MPU6050_SCAN_ACCL_Y,
> INV_MPU6050_SCAN_ACCL_Z,
> + INV_MPU6050_SCAN_TEMP,
> INV_MPU6050_SCAN_GYRO_X,
> INV_MPU6050_SCAN_GYRO_Y,
> INV_MPU6050_SCAN_GYRO_Z,
> @@ -355,18 +359,6 @@ enum inv_mpu6050_scan {
> INV_MPU9X50_SCAN_TIMESTAMP,
> };
>
> -/* scan element definition for ICM20602, which includes temperature */
> -enum inv_icm20602_scan {
> - INV_ICM20602_SCAN_ACCL_X,
> - INV_ICM20602_SCAN_ACCL_Y,
> - INV_ICM20602_SCAN_ACCL_Z,
> - INV_ICM20602_SCAN_TEMP,
> - INV_ICM20602_SCAN_GYRO_X,
> - INV_ICM20602_SCAN_GYRO_Y,
> - INV_ICM20602_SCAN_GYRO_Z,
> - INV_ICM20602_SCAN_TIMESTAMP,
> -};
> -
> enum inv_mpu6050_filter_e {
> INV_MPU6050_FILTER_256HZ_NOLPF2 = 0,
> INV_MPU6050_FILTER_188HZ,
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
> index 10d16ec5104b..3755577dc449 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
> @@ -142,6 +142,8 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
> d |= INV_MPU6050_BITS_GYRO_OUT;
> if (st->chip_config.accl_fifo_enable)
> d |= INV_MPU6050_BIT_ACCEL_OUT;
> + if (st->chip_config.temp_fifo_enable)
> + d |= INV_MPU6050_BIT_TEMP_OUT;
> if (st->chip_config.magn_fifo_enable)
> d |= INV_MPU6050_BIT_SLAVE_0;
> result = regmap_write(st->map, st->reg->fifo_en, d);
> @@ -200,8 +202,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
> if (st->chip_config.gyro_fifo_enable)
> bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR;
>
> - if (st->chip_type == INV_ICM20602)
> - bytes_per_datum += INV_ICM20602_BYTES_PER_TEMP_SENSOR;
> + if (st->chip_config.temp_fifo_enable)
> + bytes_per_datum += INV_MPU6050_BYTES_PER_TEMP_SENSOR;
>
> if (st->chip_config.magn_fifo_enable)
> bytes_per_datum += INV_MPU9X50_BYTES_MAGN;
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
> index a9c75bc62f18..5199fe790c30 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
> @@ -24,6 +24,9 @@ static void inv_scan_query_mpu6050(struct iio_dev *indio_dev)
> indio_dev->active_scan_mask) ||
> test_bit(INV_MPU6050_SCAN_ACCL_Z,
> indio_dev->active_scan_mask);
> +
> + st->chip_config.temp_fifo_enable =
> + test_bit(INV_MPU6050_SCAN_TEMP, indio_dev->active_scan_mask);
> }
>
> static void inv_scan_query_mpu9x50(struct iio_dev *indio_dev)
