Commit 747c7cf1 authored by Jagath Jog J's avatar Jagath Jog J Committed by Jonathan Cameron
Browse files

iio: accel: bma400: Fix the scale min and max macro values 



Changing the scale macro values to match the bma400 sensitivity
for 1 LSB of all the available ranges.

Fixes: 465c811f ("iio: accel: Add driver for the BMA400")
Signed-off-by: default avatarJagath Jog J <jagathjog1996@gmail.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220505133021.22362-2-jagathjog1996@gmail.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 8dc0a727

drivers/iio/accel/bma400.h

+21 −2
Original line number Diff line number Diff line
@@ -83,8 +83,27 @@ 
#define BMA400_ACC_ODR_MIN_WHOLE_HZ 25

#define BMA400_ACC_ODR_MIN_HZ       12



#define BMA400_SCALE_MIN            38357

#define BMA400_SCALE_MAX            306864

/*

 * BMA400_SCALE_MIN macro value represents m/s^2 for 1 LSB before

 * converting to micro values for +-2g range.

 *

 * For +-2g - 1 LSB = 0.976562 milli g = 0.009576 m/s^2

 * For +-4g - 1 LSB = 1.953125 milli g = 0.019153 m/s^2

 * For +-16g - 1 LSB = 7.8125 milli g = 0.076614 m/s^2

 *

 * The raw value which is used to select the different ranges is determined

 * by the first bit set position from the scale value, so BMA400_SCALE_MIN

 * should be odd.

 *

 * Scale values for +-2g, +-4g, +-8g and +-16g are populated into bma400_scales

 * array by left shifting BMA400_SCALE_MIN.

 * e.g.:

 * To select +-2g = 9577 << 0 = raw value to write is 0.

 * To select +-8g = 9577 << 2 = raw value to write is 2.

 * To select +-16g = 9577 << 3 = raw value to write is 3.

 */

#define BMA400_SCALE_MIN            9577

#define BMA400_SCALE_MAX            76617



#define BMA400_NUM_REGULATORS       2

#define BMA400_VDD_REGULATOR        0