motion_sense: Make change in range permanent

When AP changes range, unlike offset or ODR, it was not surviving init()
call. If the sensor is powered off in S3, at resume the range would be
back to the default.

To make it consistent with other attributes, remember range change until
EC powers down.

- remove get_range
- add current_range to store the range currently used.
  This is modifiable by the AP
- when the AP shutdown, revert current_range to default_range
- Remove const attribute for sensor structure when init and set_range is
  called.

BUG=chromium:1083791
BRANCH=none
TEST=One eve branch, check range is preserved even after 'shutdown -h 0'

Change-Id: Ia7126ac0cc9c3fef60b4464d95d6dd15e64b0fc4
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2215751
Reviewed-by: Yuval Peress <peress@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/common/body_detection.c b/common/body_detection.c
index 375b4456d0..c15e1bc6bb 100644
--- a/common/body_detection.c
+++ b/common/body_detection.c
@@ -169,7 +169,6 @@ static void determine_threshold_scale(int range, int resolution, int rms_noise)
 void body_detect_reset(void)
 {
 	int odr = body_sensor->drv->get_data_rate(body_sensor);
-	int range = body_sensor->drv->get_range(body_sensor);
 	int resolution = body_sensor->drv->get_resolution(body_sensor);
 	int rms_noise = body_sensor->drv->get_rms_noise(body_sensor);
 
@@ -181,7 +180,8 @@ void body_detect_reset(void)
 	if (odr == 0)
 		return;
 	determine_window_size(odr);
-	determine_threshold_scale(range, resolution, rms_noise);
+	determine_threshold_scale(body_sensor->current_range,
+				  resolution, rms_noise);
 	/* initialize motion data and state */
 	memset(data, 0, sizeof(data));
 	history_idx = 0;