linux-kernel - Re: [PATCH v2 1/3] iio: accel: BMC150: fix scale value for 16G

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Message-ID: <5401A913.6080700@kernel.org>
Date:	Sat, 30 Aug 2014 11:36:03 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Laurentiu Palcu <laurentiu.palcu@...el.com>,
	linux-iio@...r.kernel.org
CC:	srinivas.pandruvada@...ux.intel.com, knaack.h@....de,
	lars@...afoo.de, pmeerw@...erw.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] iio: accel: BMC150: fix scale value for 16G

On 29/08/14 09:38, Laurentiu Palcu wrote:
> According to documentation ([1] - page 27), the range for 16G is
> 7.81mg/LSB. Converted to SI, this is:
>     7.81 * 10^-3 * 9.80665 m/s^2 / LSB = 0.0765899365 m/s^2 / LSB
> 
> [1] http://ae-bst.resource.bosch.com/media/products/dokumente/bmc150/BST-BMC150-DS000-04.pdf
> 
> Signed-off-by: Laurentiu Palcu <laurentiu.palcu@...el.com>
Applied to the togreg branch of iio.git - initially pushed out as testing for the autobuilders
to play.

I could only track down one previous datasheet version and that had the
same value, so perhaps a typo was responsible for this error.

Jonathan
> ---
>  drivers/iio/accel/bmc150-accel.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
> index 23ae334..ccb6cf8 100644
> --- a/drivers/iio/accel/bmc150-accel.c
> +++ b/drivers/iio/accel/bmc150-accel.c
> @@ -173,7 +173,7 @@ static const struct {
>  } bmc150_accel_scale_table[] = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
>  				 {19122, BMC150_ACCEL_DEF_RANGE_4G},
>  				 {38344, BMC150_ACCEL_DEF_RANGE_8G},
> -				 {77057, BMC150_ACCEL_DEF_RANGE_16G} };
> +				 {76590, BMC150_ACCEL_DEF_RANGE_16G} };
>  
>  static const struct {
>  	int sleep_dur;
> 
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