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rambi: change EC accel sampling rate and default sensor output data rate.

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Two accelerometer changes:
- Lower accel sampling rate when chipset is off to 10Hz. Increase
sampling rate back up to 100Hz when transitioning to S0.
- Change the default output data rate of the accelerometers to 100Hz
which matches the EC sampling rate when in S0.

BUG=none
BRANCH=rambi
TEST=manual testing. used lidangle command to verify that in S0,
EC is sampling at 100Hz, and in S3 or lower it is sampling at 10Hz.

Change-Id: Ie4e20f45f9371d674c3325a362d2729c331fac4f
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/190032
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Alec Berg
2014-03-11 15:17:41 -07:00
committed by chrome-internal-fetch
parent b9b5c89c30
commit 5bd3d71259
2 changed files with 26 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
common/motion_sense.c
View File

@@ -28,8 +28,12 @@ static vector_3_t acc_lid_raw, acc_lid, acc_base;
static vector_3_t acc_lid_host, acc_base_host;
static float lid_angle_deg;
/* Accelerometer polling intervals based on chipset state. */
#define ACCEL_INTERVAL_AP_ON_MS 10
#define ACCEL_INTERVAL_AP_SUSPEND_MS 100
/* Sampling interval for measuring acceleration and calculating lid angle. */
static int accel_interval_ms = 10;
static int accel_interval_ms = ACCEL_INTERVAL_AP_SUSPEND_MS;
#ifdef CONFIG_CMD_LID_ANGLE
static int accel_disp;
@@ -117,6 +121,20 @@ void motion_get_accel_base(vector_3_t *v)
}
#endif
/* Lower accel polling rate on chipset suspend. */
static void set_slow_accel_polling(void)
{
accel_interval_ms = ACCEL_INTERVAL_AP_SUSPEND_MS;
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, set_slow_accel_polling, HOOK_PRIO_DEFAULT);
/* Raise accel polling rate on chipset resume. */
static void set_fast_accel_polling(void)
{
accel_interval_ms = ACCEL_INTERVAL_AP_ON_MS;
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, set_fast_accel_polling, HOOK_PRIO_DEFAULT);
void motion_sense_task(void)
{
@@ -244,7 +262,11 @@ static int command_ctrl_print_lid_angle_calcs(int argc, char **argv)
accel_disp = val;
}
/* Second arg changes the accel task time interval. */
/*
* Second arg changes the accel task time interval. Note accel
* sampling interval will be clobbered when chipset suspends or
* resumes.
*/
if (argc > 2) {
val = strtoi(argv[2], &e, 0);
if (*e)

4
driver/accel_kxcj9.c
View File

@@ -21,8 +21,8 @@ static int sensor_range[ACCEL_COUNT] = {KXCJ9_GSEL_2G, KXCJ9_GSEL_2G};
static int sensor_resolution[ACCEL_COUNT] = {KXCJ9_RES_12BIT, KXCJ9_RES_12BIT};
/* Output data rate: KXCJ9_OSA_* ranges from 0.781Hz to 1600Hz. */
static int sensor_datarate[ACCEL_COUNT] = {KXCJ9_OSA_12_50HZ,
KXCJ9_OSA_12_50HZ};
static int sensor_datarate[ACCEL_COUNT] = {KXCJ9_OSA_100_0HZ,
KXCJ9_OSA_100_0HZ};
/**
* Read register from accelerometer.