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iio: accel: adxl313: implement power-save on inactivity

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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.

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://patch.msgid.link/20250702230819.19353-7-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lothar Rubusch 2025-07-02 23:08:17 +00:00 • committed by Jonathan Cameron
parent e3fc1cadf2
commit 554396d4b0
2 changed files with 25 additions and 0 deletions
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3
drivers/iio/accel/adxl313.h
View file

@ -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

22
drivers/iio/accel/adxl313_core.c
View file

@ -396,6 +396,23 @@ 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;
return regmap_assign_bits(data->regmap, ADXL313_REG_POWER_CTL,
ADXL313_POWER_CTL_AUTO_SLEEP | ADXL313_POWER_CTL_LINK,
en && act_en && inact_en);
}
static int adxl313_set_act_inact_en(struct adxl313_data *data,
enum adxl313_activity_type type,
bool cmd_en)
@ -455,6 +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);
}