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From: Jonathan Cameron <jic23@kernel.org>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: lorenzo.bianconi@redhat.com, mario.tesi@st.com,
	linux-iio@vger.kernel.org
Subject: Re: [PATCH v2 2/2] iio: imu: st_lsm6dsx: express odr in mHZ
Date: Sat, 9 Nov 2019 14:46:54 +0000
Message-ID: <20191109131940.54bbe6b4@archlinux> (raw)
In-Reply-To: <2b3c301e7fc808e19c5ad04a34a3bf1fa301da3c.1572810064.git.lorenzo@kernel.org>

On Sun,  3 Nov 2019 20:47:18 +0100
Lorenzo Bianconi <lorenzo@kernel.org> wrote:

> Express available frequencies in mHZ in order to support even
> rational ODRs. This patch is need to fix an Android CTS failure
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
I've pulled the earlier fix across from the fixes-togreg branch as
I 'think' I'll get a pull request out before the merge window
whereas fixes will now be after.

One thing inline that I'll fix up.

> ---
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h       |   6 +-
>  .../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c    |   9 +-
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c  | 197 +++++++++---------
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c  |  31 +--
>  4 files changed, 126 insertions(+), 117 deletions(-)
> 
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
> index 9ffc8e06f73d..8ea969e1b72b 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;
> +	u32 hz; /* expressed in mHZ */
Don't call it hz and express in it in milli hz!

	u32 milli_hz; will do nicely. + no
need for comment then...

>  	u8 val;
>  };
>  
> @@ -330,7 +330,7 @@ struct st_lsm6dsx_sensor {
>  	struct st_lsm6dsx_hw *hw;
>  
>  	u32 gain;
> -	u16 odr;
> +	u32 odr;
>  
>  	u16 watermark;
>  	u8 sip;
> @@ -415,7 +415,7 @@ int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
>  			     enum st_lsm6dsx_fifo_mode fifo_mode);
>  int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw);
>  int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw);
> -int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr, u8 *val);
> +int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u32 odr, u8 *val);
>  int st_lsm6dsx_shub_probe(struct st_lsm6dsx_hw *hw, const char *name);
>  int st_lsm6dsx_shub_set_enable(struct st_lsm6dsx_sensor *sensor, bool enable);
>  int st_lsm6dsx_set_page(struct st_lsm6dsx_hw *hw, bool enable);
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> index 31cd90d2c60e..d416990ae309 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> @@ -91,7 +91,7 @@ static int st_lsm6dsx_get_decimator_val(u8 val)
>  }
>  
>  static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw,
> -				       u16 *max_odr, u16 *min_odr)
> +				       u32 *max_odr, u32 *min_odr)
>  {
>  	struct st_lsm6dsx_sensor *sensor;
>  	int i;
> @@ -106,16 +106,17 @@ static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw,
>  		if (!(hw->enable_mask & BIT(sensor->id)))
>  			continue;
>  
> -		*max_odr = max_t(u16, *max_odr, sensor->odr);
> -		*min_odr = min_t(u16, *min_odr, sensor->odr);
> +		*max_odr = max_t(u32, *max_odr, sensor->odr);
> +		*min_odr = min_t(u32, *min_odr, sensor->odr);
>  	}
>  }
>  
>  static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw)
>  {
> -	u16 max_odr, min_odr, sip = 0, ts_sip = 0;
>  	const struct st_lsm6dsx_reg *ts_dec_reg;
>  	struct st_lsm6dsx_sensor *sensor;
> +	u16 sip = 0, ts_sip = 0;
> +	u32 max_odr, min_odr;
>  	int err = 0, i;
>  	u8 data;
>  
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index 2f9396745bc8..03e5cd0cfcba 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] = {  10000, 0x01 },
> +				.odr_avl[1] = {  50000, 0x02 },
> +				.odr_avl[2] = { 119000, 0x03 },
> +				.odr_avl[3] = { 238000, 0x04 },
> +				.odr_avl[4] = { 476000, 0x05 },
> +				.odr_avl[5] = { 952000, 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] = {  14900, 0x01 },
> +				.odr_avl[1] = {  59500, 0x02 },
> +				.odr_avl[2] = { 119000, 0x03 },
> +				.odr_avl[3] = { 238000, 0x04 },
> +				.odr_avl[4] = { 476000, 0x05 },
> +				.odr_avl[5] = { 952000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 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] = {  12500, 0x01 },
> +				.odr_avl[1] = {  26000, 0x02 },
> +				.odr_avl[2] = {  52000, 0x03 },
> +				.odr_avl[3] = { 104000, 0x04 },
> +				.odr_avl[4] = { 208000, 0x05 },
> +				.odr_avl[5] = { 416000, 0x06 },
>  				.odr_len = 6,
>  			},
>  		},
> @@ -1358,7 +1358,7 @@ static int st_lsm6dsx_set_full_scale(struct st_lsm6dsx_sensor *sensor,
>  	return 0;
>  }
>  
> -int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr, u8 *val)
> +int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u32 odr, u8 *val)
>  {
>  	const struct st_lsm6dsx_odr_table_entry *odr_table;
>  	int i;
> @@ -1380,14 +1380,15 @@ int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr, u8 *val)
>  	return odr_table->odr_avl[i].hz;
>  }
>  
> -static u16 st_lsm6dsx_check_odr_dependency(struct st_lsm6dsx_hw *hw, u16 odr,
> -					   enum st_lsm6dsx_sensor_id id)
> +static int
> +st_lsm6dsx_check_odr_dependency(struct st_lsm6dsx_hw *hw, u32 odr,
> +				enum st_lsm6dsx_sensor_id id)
>  {
>  	struct st_lsm6dsx_sensor *ref = iio_priv(hw->iio_devs[id]);
>  
>  	if (odr > 0) {
>  		if (hw->enable_mask & BIT(id))
> -			return max_t(u16, ref->odr, odr);
> +			return max_t(u32, ref->odr, odr);
>  		else
>  			return odr;
>  	} else {
> @@ -1395,7 +1396,8 @@ static u16 st_lsm6dsx_check_odr_dependency(struct st_lsm6dsx_hw *hw, u16 odr,
>  	}
>  }
>  
> -static int st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u16 req_odr)
> +static int
> +st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u32 req_odr)
>  {
>  	struct st_lsm6dsx_sensor *ref_sensor = sensor;
>  	struct st_lsm6dsx_hw *hw = sensor->hw;
> @@ -1409,7 +1411,7 @@ static int st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u16 req_odr)
>  	case ST_LSM6DSX_ID_EXT1:
>  	case ST_LSM6DSX_ID_EXT2:
>  	case ST_LSM6DSX_ID_ACC: {
> -		u16 odr;
> +		u32 odr;
>  		int i;
>  
>  		/*
> @@ -1449,7 +1451,7 @@ int st_lsm6dsx_sensor_set_enable(struct st_lsm6dsx_sensor *sensor,
>  				 bool enable)
>  {
>  	struct st_lsm6dsx_hw *hw = sensor->hw;
> -	u16 odr = enable ? sensor->odr : 0;
> +	u32 odr = enable ? sensor->odr : 0;
>  	int err;
>  
>  	err = st_lsm6dsx_set_odr(sensor, odr);
> @@ -1475,7 +1477,7 @@ static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
>  	if (err < 0)
>  		return err;
>  
> -	delay = 1000000 / sensor->odr;
> +	delay = 1000000000 / sensor->odr;
>  	usleep_range(delay, 2 * delay);
>  
>  	err = st_lsm6dsx_read_locked(hw, addr, &data, sizeof(data));
> @@ -1507,8 +1509,9 @@ 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 / 1000;
> +		*val2 = (sensor->odr % 1000) * 1000;
> +		ret = IIO_VAL_INT_PLUS_MICRO;
>  		break;
>  	case IIO_CHAN_INFO_SCALE:
>  		*val = 0;
> @@ -1541,6 +1544,7 @@ static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
>  	case IIO_CHAN_INFO_SAMP_FREQ: {
>  		u8 data;
>  
> +		val = val * 1000 + val2 / 1000;
>  		val = st_lsm6dsx_check_odr(sensor, val, &data);
>  		if (val < 0)
>  			err = val;
> @@ -1730,8 +1734,9 @@ 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.%03d ",
> +				 odr_table->odr_avl[i].hz / 1000,
> +				 odr_table->odr_avl[i].hz % 1000);
>  	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..3a0cb71ce926 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] = {  10000, 0x0 },
> +			.odr_avl[1] = {  20000, 0x1 },
> +			.odr_avl[2] = {  50000, 0x2 },
> +			.odr_avl[3] = { 100000, 0x3 },
>  			.odr_len = 4,
>  		},
>  		.fs_table = {
> @@ -94,11 +94,11 @@ static const struct st_lsm6dsx_ext_dev_settings st_lsm6dsx_ext_dev_table[] = {
>  static void st_lsm6dsx_shub_wait_complete(struct st_lsm6dsx_hw *hw)
>  {
>  	struct st_lsm6dsx_sensor *sensor;
> -	u16 odr;
> +	u32 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 : 12500;
> +	msleep((2000000U / odr) + 1);
>  }
>  
>  /**
> @@ -318,7 +318,7 @@ st_lsm6dsx_shub_write_with_mask(struct st_lsm6dsx_sensor *sensor,
>  
>  static int
>  st_lsm6dsx_shub_get_odr_val(struct st_lsm6dsx_sensor *sensor,
> -			    u16 odr, u16 *val)
> +			    u32 odr, u16 *val)
>  {
>  	const struct st_lsm6dsx_ext_dev_settings *settings;
>  	int i;
> @@ -337,7 +337,7 @@ st_lsm6dsx_shub_get_odr_val(struct st_lsm6dsx_sensor *sensor,
>  }
>  
>  static int
> -st_lsm6dsx_shub_set_odr(struct st_lsm6dsx_sensor *sensor, u16 odr)
> +st_lsm6dsx_shub_set_odr(struct st_lsm6dsx_sensor *sensor, u32 odr)
>  {
>  	const struct st_lsm6dsx_ext_dev_settings *settings;
>  	u16 val;
> @@ -442,7 +442,7 @@ st_lsm6dsx_shub_read_oneshot(struct st_lsm6dsx_sensor *sensor,
>  	if (err < 0)
>  		return err;
>  
> -	delay = 1000000 / sensor->odr;
> +	delay = 1000000000 / 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 / 1000;
> +		*val2 = (sensor->odr % 1000) * 1000;
> +		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 * 1000 + val2 / 1000;
>  		err = st_lsm6dsx_shub_get_odr_val(sensor, val, &data);
>  		if (!err)
>  			sensor->odr = val;
> @@ -540,9 +542,10 @@ st_lsm6dsx_shub_sampling_freq_avail(struct device *dev,
>  
>  	settings = sensor->ext_info.settings;
>  	for (i = 0; i < settings->odr_table.odr_len; i++) {
> -		u16 val = settings->odr_table.odr_avl[i].hz;
> +		u32 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.%03d ",
> +				 val / 1000, val % 1000);
>  	}
>  	buf[len - 1] = '\n';
>  


  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-03 19:47 [PATCH v2 0/2] support rational ODRs in st_lsm6dsx Lorenzo Bianconi
2019-11-03 19:47 ` [PATCH v2 1/2] iio: imu: st_lsm6dsx: explicitly define odr table size Lorenzo Bianconi
2019-11-09 13:11   ` Jonathan Cameron
2019-11-03 19:47 ` [PATCH v2 2/2] iio: imu: st_lsm6dsx: express odr in mHZ Lorenzo Bianconi
2019-11-09 14:46   ` Jonathan Cameron [this message]
2019-11-10  9:27     ` Lorenzo Bianconi
2019-11-10 10:15       ` Jonathan Cameron

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