Configure the link bit to associate activity and inactivity sensing,
allowing the sensor to reflect its internal power-saving state.
Additionally, enable the auto-sleep bit to transition the sensor into
auto-sleep mode during periods of inactivity, as outlined in the
datasheet.
Signed-off-by: Lothar Rubusch <l.rubusch@xxxxxxxxx>
---
drivers/iio/accel/adxl313.h | 3 +++
drivers/iio/accel/adxl313_core.c | 25 +++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/iio/accel/adxl313.h b/drivers/iio/accel/adxl313.h
index d7e8cb44855b..75ef54b60f75 100644
--- a/drivers/iio/accel/adxl313.h
+++ b/drivers/iio/accel/adxl313.h
@@ -41,6 +41,9 @@
#define ADXL313_RATE_BASE 6
#define ADXL313_POWER_CTL_MSK BIT(3)
+#define ADXL313_POWER_CTL_INACT_MSK GENMASK(5, 4)
+#define ADXL313_POWER_CTL_LINK BIT(5)
+#define ADXL313_POWER_CTL_AUTO_SLEEP BIT(4)
#define ADXL313_RANGE_MSK GENMASK(1, 0)
#define ADXL313_RANGE_MAX 3
diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_core.c
index 95f52c95682a..d8a263b2a6f6 100644
--- a/drivers/iio/accel/adxl313_core.c
+++ b/drivers/iio/accel/adxl313_core.c
@@ -396,6 +396,25 @@ static int adxl313_is_act_inact_en(struct adxl313_data *data,
return adxl313_act_int_reg[type] & regval;
}
+static int adxl313_set_act_inact_linkbit(struct adxl313_data *data, bool en)
+{
+ int act_en, inact_en;
+
+ act_en = adxl313_is_act_inact_en(data, ADXL313_ACTIVITY);
+ if (act_en < 0)
+ return act_en;
+
+ inact_en = adxl313_is_act_inact_en(data, ADXL313_INACTIVITY);
+ if (inact_en < 0)
+ return inact_en;
+
+ en = en && act_en && inact_en;
+
+ return regmap_assign_bits(data->regmap, ADXL313_REG_POWER_CTL,
+ (ADXL313_POWER_CTL_AUTO_SLEEP | ADXL313_POWER_CTL_LINK),
+ en);
+}
+
static int adxl313_set_act_inact_en(struct adxl313_data *data,
enum adxl313_activity_type type,
bool cmd_en)
@@ -426,6 +445,7 @@ static int adxl313_set_act_inact_en(struct adxl313_data *data,
}
}
+ /* Start modifying configuration registers */
ret = adxl313_set_measure_en(data, false);
if (ret)
return ret;
@@ -452,6 +472,11 @@ static int adxl313_set_act_inact_en(struct adxl313_data *data,
if (ret)
return ret;
+ /* Set link-bit and auto-sleep only when ACT and INACT are enabled */
+ ret = adxl313_set_act_inact_linkbit(data, cmd_en);
+ if (ret)
+ return ret;
+
return adxl313_set_measure_en(data, true);
}
--
2.39.5
