From: Lothar Rubusch Date: Wed, 2 Jul 2025 23:08:17 +0000 (+0000) Subject: iio: accel: adxl313: implement power-save on inactivity X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=554396d4b0be5cdec4654fd3456c08886aa8da3e;p=thirdparty%2Fkernel%2Fstable.git iio: accel: adxl313: implement power-save on inactivity 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 Signed-off-by: Lothar Rubusch Link: https://patch.msgid.link/20250702230819.19353-7-l.rubusch@gmail.com Signed-off-by: Jonathan Cameron --- 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 5b6faa83be02..fe2a7d77fdfb 100644 --- a/drivers/iio/accel/adxl313_core.c +++ b/drivers/iio/accel/adxl313_core.c @@ -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); }