Version 3 of the EC protocol provides min and max frequencies for EC sensors.
Default frequencies are provided for earlier protocol.
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@xxxxxxxxxxxxx>
Signed-off-by: Nick Vaccaro <nvaccaro@xxxxxxxxxxxx>
---
.../cros_ec_sensors/cros_ec_sensors_core.c | 44 +++++++++++++++++++
.../linux/iio/common/cros_ec_sensors_core.h | 3 ++
2 files changed, 47 insertions(+)
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index 2e0f97448e64..72f56d54cccd 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -50,6 +50,37 @@ static int cros_ec_get_host_cmd_version_mask(struct cros_ec_device *ec_dev,
return ret;
}
+static void get_default_min_max_freq(enum motionsensor_type type,
+ u32 *min_freq,
+ u32 *max_freq)
+{
+ switch (type) {
+ case MOTIONSENSE_TYPE_ACCEL:
+ case MOTIONSENSE_TYPE_GYRO:
+ *min_freq = 12500;
+ *max_freq = 100000;
+ break;
+ case MOTIONSENSE_TYPE_MAG:
+ *min_freq = 5000;
+ *max_freq = 25000;
+ break;
+ case MOTIONSENSE_TYPE_PROX:
+ case MOTIONSENSE_TYPE_LIGHT:
+ *min_freq = 100;
+ *max_freq = 50000;
+ break;
+ case MOTIONSENSE_TYPE_BARO:
+ *min_freq = 250;
+ *max_freq = 20000;
+ break;
+ case MOTIONSENSE_TYPE_ACTIVITY:
+ default:
+ *min_freq = 0;
+ *max_freq = 0;
+ break;
+ }
+}
+
int cros_ec_sensors_core_init(struct platform_device *pdev,
struct iio_dev *indio_dev,
bool physical_device)
@@ -100,6 +131,19 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
}
state->type = state->resp->info.type;
state->loc = state->resp->info.location;
+
+ /* Value to stop the device */
+ state->frequencies[0] = 0;
+ if (state->msg->version < 3) {
+ get_default_min_max_freq(state->resp->info.type,
+ &state->frequencies[1],
+ &state->frequencies[2]);
+ } else {
+ state->frequencies[1] =
+ state->resp->info_3.min_frequency;
+ state->frequencies[2] =
+ state->resp->info_3.max_frequency;
+ }
}
return 0;
diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h
index 0c636b9fe8d7..94c87da22c04 100644
--- a/include/linux/iio/common/cros_ec_sensors_core.h
+++ b/include/linux/iio/common/cros_ec_sensors_core.h
@@ -70,6 +70,9 @@ struct cros_ec_sensors_core_state {
unsigned long scan_mask, s16 *data);
int curr_sampl_freq;
+
+ /* Disable, Min and Max Sampling Frequency in mHz */
+ int frequencies[3];
};
/**
--
2.20.1
