Re: [PATCH 2/2] iio: imu: st_lsm6dsx: express odr in HZ / 10

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On Sun, 27 Oct 2019 20:21:24 +0100
Lorenzo Bianconi <lorenzo@xxxxxxxxxx> wrote:

> Express available frequencies in HZ / 10 in order to support even
> rational ODRs. This patch is need to fix an Android CTS failure
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> ---
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h      |   2 +-
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 181 ++++++++++---------
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c |  23 ++-
>  3 files changed, 106 insertions(+), 100 deletions(-)
> 
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> index 9ffc8e06f73d..b32c6389f47b 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> @@ -106,7 +106,7 @@ struct st_lsm6dsx_sensor;
>  struct st_lsm6dsx_hw;
>  
>  struct st_lsm6dsx_odr {
> -	u16 hz;
> +	u16 hz; /* expressed in HZ / 10 */

That is in the non obvious category.  Maybe best bet
is to switch to millihz and make the type bigger if needed?

Thanks,

Jonathan

>  	u8 val;
>  };
>  
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index 2f9396745bc8..63e113725499 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -127,12 +127,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x20,
>  					.mask = GENMASK(7, 5),
>  				},
> -				.odr_avl[0] = {  10, 0x01 },
> -				.odr_avl[1] = {  50, 0x02 },
> -				.odr_avl[2] = { 119, 0x03 },
> -				.odr_avl[3] = { 238, 0x04 },
> -				.odr_avl[4] = { 476, 0x05 },
> -				.odr_avl[5] = { 952, 0x06 },
> +				.odr_avl[0] = {  100, 0x01 },
> +				.odr_avl[1] = {  500, 0x02 },
> +				.odr_avl[2] = { 1190, 0x03 },
> +				.odr_avl[3] = { 2380, 0x04 },
> +				.odr_avl[4] = { 4760, 0x05 },
> +				.odr_avl[5] = { 9520, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -140,12 +140,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 5),
>  				},
> -				.odr_avl[0] = {  15, 0x01 },
> -				.odr_avl[1] = {  60, 0x02 },
> -				.odr_avl[2] = { 119, 0x03 },
> -				.odr_avl[3] = { 238, 0x04 },
> -				.odr_avl[4] = { 476, 0x05 },
> -				.odr_avl[5] = { 952, 0x06 },
> +				.odr_avl[0] = {  149, 0x01 },
> +				.odr_avl[1] = {  595, 0x02 },
> +				.odr_avl[2] = { 1190, 0x03 },
> +				.odr_avl[3] = { 2380, 0x04 },
> +				.odr_avl[4] = { 4760, 0x05 },
> +				.odr_avl[5] = { 9520, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -229,12 +229,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -242,12 +242,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -395,12 +395,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -408,12 +408,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -570,12 +570,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -583,12 +583,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -747,12 +747,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -760,12 +760,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -944,12 +944,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -957,12 +957,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -1121,12 +1121,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x10,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  			[ST_LSM6DSX_ID_GYRO] = {
> @@ -1134,12 +1134,12 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
>  					.addr = 0x11,
>  					.mask = GENMASK(7, 4),
>  				},
> -				.odr_avl[0] = {  13, 0x01 },
> -				.odr_avl[1] = {  26, 0x02 },
> -				.odr_avl[2] = {  52, 0x03 },
> -				.odr_avl[3] = { 104, 0x04 },
> -				.odr_avl[4] = { 208, 0x05 },
> -				.odr_avl[5] = { 416, 0x06 },
> +				.odr_avl[0] = {  125, 0x01 },
> +				.odr_avl[1] = {  260, 0x02 },
> +				.odr_avl[2] = {  520, 0x03 },
> +				.odr_avl[3] = { 1040, 0x04 },
> +				.odr_avl[4] = { 2080, 0x05 },
> +				.odr_avl[5] = { 4160, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -1475,7 +1475,7 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
>  	if (err < 0)
>  		return err;
>  
> -	delay = 1000000 / sensor->odr;
> +	delay = 10000000 / sensor->odr;
>  	usleep_range(delay, 2 * delay);
>  
>  	err = st_lsm6dsx_read_locked(hw, addr, &data, sizeof(data));
> @@ -1507,8 +1507,9 @@ static int st_lsm6dsx_read_raw(struct iio_dev *iio_dev,
>  		iio_device_release_direct_mode(iio_dev);
>  		break;
>  	case IIO_CHAN_INFO_SAMP_FREQ:
> -		*val = sensor->odr;
> -		ret = IIO_VAL_INT;
> +		*val = sensor->odr / 10;
> +		*val2 = (sensor->odr % 10) * 100000;
> +		ret = IIO_VAL_INT_PLUS_MICRO;
>  		break;
>  	case IIO_CHAN_INFO_SCALE:
>  		*val = 0;
> @@ -1541,6 +1542,7 @@ static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
>  	case IIO_CHAN_INFO_SAMP_FREQ: {
>  		u8 data;
>  
> +		val = val * 10 + val2 / 100000;
>  		val = st_lsm6dsx_check_odr(sensor, val, &data);
>  		if (val < 0)
>  			err = val;
> @@ -1730,8 +1732,9 @@ st_lsm6dsx_sysfs_sampling_frequency_avail(struct device *dev,
>  
>  	odr_table = &sensor->hw->settings->odr_table[sensor->id];
>  	for (i = 0; i < odr_table->odr_len; i++)
> -		len += scnprintf(buf + len, PAGE_SIZE - len, "%d ",
> -				 odr_table->odr_avl[i].hz);
> +		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%d ",
> +				 odr_table->odr_avl[i].hz / 10,
> +				 odr_table->odr_avl[i].hz % 10);
>  	buf[len - 1] = '\n';
>  
>  	return len;
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
> index e029cc05a17f..c3b124a73815 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
> @@ -51,10 +51,10 @@ static const struct st_lsm6dsx_ext_dev_settings st_lsm6dsx_ext_dev_table[] = {
>  				.addr = 0x60,
>  				.mask = GENMASK(3, 2),
>  			},
> -			.odr_avl[0] = {  10, 0x0 },
> -			.odr_avl[1] = {  20, 0x1 },
> -			.odr_avl[2] = {  50, 0x2 },
> -			.odr_avl[3] = { 100, 0x3 },
> +			.odr_avl[0] = {  100, 0x0 },
> +			.odr_avl[1] = {  200, 0x1 },
> +			.odr_avl[2] = {  500, 0x2 },
> +			.odr_avl[3] = { 1000, 0x3 },
>  			.odr_len = 4,
>  		},
>  		.fs_table = {
> @@ -97,8 +97,8 @@ static void st_lsm6dsx_shub_wait_complete(struct st_lsm6dsx_hw *hw)
>  	u16 odr;
>  
>  	sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
> -	odr = (hw->enable_mask & BIT(ST_LSM6DSX_ID_ACC)) ? sensor->odr : 13;
> -	msleep((2000U / odr) + 1);
> +	odr = (hw->enable_mask & BIT(ST_LSM6DSX_ID_ACC)) ? sensor->odr : 125;
> +	msleep((20000U / odr) + 1);
>  }
>  
>  /**
> @@ -442,7 +442,7 @@ st_lsm6dsx_shub_read_oneshot(struct st_lsm6dsx_sensor *sensor,
>  	if (err < 0)
>  		return err;
>  
> -	delay = 1000000 / sensor->odr;
> +	delay = 10000000 / sensor->odr;
>  	usleep_range(delay, 2 * delay);
>  
>  	len = min_t(int, sizeof(data), ch->scan_type.realbits >> 3);
> @@ -482,8 +482,9 @@ st_lsm6dsx_shub_read_raw(struct iio_dev *iio_dev,
>  		iio_device_release_direct_mode(iio_dev);
>  		break;
>  	case IIO_CHAN_INFO_SAMP_FREQ:
> -		*val = sensor->odr;
> -		ret = IIO_VAL_INT;
> +		*val = sensor->odr / 10;
> +		*val2 = (sensor->odr % 10) * 100000;
> +		ret = IIO_VAL_INT_PLUS_MICRO;
>  		break;
>  	case IIO_CHAN_INFO_SCALE:
>  		*val = 0;
> @@ -514,6 +515,7 @@ st_lsm6dsx_shub_write_raw(struct iio_dev *iio_dev,
>  	case IIO_CHAN_INFO_SAMP_FREQ: {
>  		u16 data;
>  
> +		val = val * 10 + val2 / 100000;
>  		err = st_lsm6dsx_shub_get_odr_val(sensor, val, &data);
>  		if (!err)
>  			sensor->odr = val;
> @@ -542,7 +544,8 @@ st_lsm6dsx_shub_sampling_freq_avail(struct device *dev,
>  	for (i = 0; i < settings->odr_table.odr_len; i++) {
>  		u16 val = settings->odr_table.odr_avl[i].hz;
>  
> -		len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", val);
> +		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%d ",
> +				 val / 10, val % 10);
>  	}
>  	buf[len - 1] = '\n';
>  




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