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[84.72.156.211]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a4f009f9d6sm11890444f8f.84.2025.06.01.10.21.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Jun 2025 10:21:59 -0700 (PDT) From: Lothar Rubusch To: jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, corbet@lwn.net, lucas.p.stankus@gmail.com, lars@metafoo.de, Michael.Hennerich@analog.com, bagasdotme@gmail.com Cc: l.rubusch@gmail.com, linux-iio@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 08/11] iio: accel: adxl313: add inactivity sensing Date: Sun, 1 Jun 2025 17:21:36 +0000 Message-Id: <20250601172139.59156-9-l.rubusch@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250601172139.59156-1-l.rubusch@gmail.com> References: <20250601172139.59156-1-l.rubusch@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend the interrupt handler to process interrupts as inactivity events. Add functions to set threshold and period registers for inactivity. Add functions to enable / disable inactivity. Extend the fake iio channel to deal with inactivity events on x, y and z combined with AND. Signed-off-by: Lothar Rubusch --- drivers/iio/accel/adxl313.h | 2 + drivers/iio/accel/adxl313_core.c | 159 +++++++++++++++++++++++++------ 2 files changed, 131 insertions(+), 30 deletions(-) diff --git a/drivers/iio/accel/adxl313.h b/drivers/iio/accel/adxl313.h index 4f4a9fd39f6d..d7e8cb44855b 100644 --- a/drivers/iio/accel/adxl313.h +++ b/drivers/iio/accel/adxl313.h @@ -18,6 +18,8 @@ #define ADXL313_REG_SOFT_RESET 0x18 #define ADXL313_REG_OFS_AXIS(index) (0x1E + (index)) #define ADXL313_REG_THRESH_ACT 0x24 +#define ADXL313_REG_THRESH_INACT 0x25 +#define ADXL313_REG_TIME_INACT 0x26 #define ADXL313_REG_ACT_INACT_CTL 0x27 #define ADXL313_REG_BW_RATE 0x2C #define ADXL313_REG_POWER_CTL 0x2D diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_c= ore.c index e647c40575ab..c5767d56b0cb 100644 --- a/drivers/iio/accel/adxl313_core.c +++ b/drivers/iio/accel/adxl313_core.c @@ -28,18 +28,22 @@ #define ADXL313_REG_XYZ_BASE ADXL313_REG_DATA_AXIS(0) =20 #define ADXL313_ACT_XYZ_EN GENMASK(6, 4) +#define ADXL313_INACT_XYZ_EN GENMASK(2, 0) =20 /* activity/inactivity */ enum adxl313_activity_type { ADXL313_ACTIVITY, + ADXL313_INACTIVITY, }; =20 static const unsigned int adxl313_act_int_reg[] =3D { [ADXL313_ACTIVITY] =3D ADXL313_INT_ACTIVITY, + [ADXL313_INACTIVITY] =3D ADXL313_INT_INACTIVITY, }; =20 static const unsigned int adxl313_act_thresh_reg[] =3D { [ADXL313_ACTIVITY] =3D ADXL313_REG_THRESH_ACT, + [ADXL313_INACTIVITY] =3D ADXL313_REG_THRESH_INACT, }; =20 static const struct regmap_range adxl312_readable_reg_range[] =3D { @@ -253,6 +257,16 @@ static const struct iio_event_spec adxl313_activity_ev= ents[] =3D { }, }; =20 +static const struct iio_event_spec adxl313_inactivity_events[] =3D { + { + .type =3D IIO_EV_TYPE_MAG, + .dir =3D IIO_EV_DIR_FALLING, + .mask_separate =3D BIT(IIO_EV_INFO_ENABLE), + .mask_shared_by_type =3D BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_PERIOD), + }, +}; + enum adxl313_chans { chan_x, chan_y, chan_z, }; @@ -269,6 +283,14 @@ static const struct iio_chan_spec adxl313_channels[] = =3D { .event_spec =3D adxl313_activity_events, .num_event_specs =3D ARRAY_SIZE(adxl313_activity_events), }, + { + .type =3D IIO_ACCEL, + .modified =3D 1, + .channel2 =3D IIO_MOD_X_AND_Y_AND_Z, + .scan_index =3D -1, /* Fake channel for axis AND'ing */ + .event_spec =3D adxl313_inactivity_events, + .num_event_specs =3D ARRAY_SIZE(adxl313_inactivity_events), + }, }; =20 static const unsigned long adxl313_scan_masks[] =3D { @@ -331,6 +353,15 @@ static int adxl313_read_freq_avail(struct iio_dev *ind= io_dev, } } =20 +static int adxl313_set_inact_time_s(struct adxl313_data *data, + unsigned int val_s) +{ + unsigned int max_boundary =3D 255; + unsigned int val =3D min(val_s, max_boundary); + + return regmap_write(data->regmap, ADXL313_REG_TIME_INACT, val); +} + static int adxl313_is_act_inact_en(struct adxl313_data *data, enum adxl313_activity_type type) { @@ -343,10 +374,10 @@ static int adxl313_is_act_inact_en(struct adxl313_dat= a *data, return ret; =20 /* Check if axis for activity are enabled */ - if (type !=3D ADXL313_ACTIVITY) - return 0; - - axis_en =3D FIELD_GET(ADXL313_ACT_XYZ_EN, axis_ctrl); + if (type =3D=3D ADXL313_ACTIVITY) + axis_en =3D FIELD_GET(ADXL313_ACT_XYZ_EN, axis_ctrl); + else + axis_en =3D FIELD_GET(ADXL313_INACT_XYZ_EN, axis_ctrl); =20 /* The axis are enabled, now check if specific interrupt is enabled */ ret =3D regmap_read(data->regmap, ADXL313_REG_INT_ENABLE, ®val); @@ -364,12 +395,14 @@ static int adxl313_set_act_inact_en(struct adxl313_da= ta *data, { unsigned int axis_ctrl; unsigned int threshold; + unsigned int inact_time_s; + bool en; int ret; =20 - if (type !=3D ADXL313_ACTIVITY) - return 0; - - axis_ctrl =3D ADXL313_ACT_XYZ_EN; + if (type =3D=3D ADXL313_ACTIVITY) + axis_ctrl =3D ADXL313_ACT_XYZ_EN; + else + axis_ctrl =3D ADXL313_INACT_XYZ_EN; =20 ret =3D adxl313_set_measure_en(data, false); if (ret) @@ -384,9 +417,17 @@ static int adxl313_set_act_inact_en(struct adxl313_dat= a *data, if (ret) return ret; =20 + en =3D cmd_en && threshold; + if (type =3D=3D ADXL313_INACTIVITY) { + ret =3D regmap_read(data->regmap, ADXL313_REG_TIME_INACT, &inact_time_s); + if (ret) + return ret; + + en =3D en && inact_time_s; + } + ret =3D regmap_assign_bits(data->regmap, ADXL313_REG_INT_ENABLE, - adxl313_act_int_reg[type], - cmd_en && threshold); + adxl313_act_int_reg[type], en); if (ret) return ret; =20 @@ -479,6 +520,8 @@ static int adxl313_read_event_config(struct iio_dev *in= dio_dev, switch (dir) { case IIO_EV_DIR_RISING: return adxl313_is_act_inact_en(data, ADXL313_ACTIVITY); + case IIO_EV_DIR_FALLING: + return adxl313_is_act_inact_en(data, ADXL313_INACTIVITY); default: return -EINVAL; } @@ -498,6 +541,8 @@ static int adxl313_write_event_config(struct iio_dev *i= ndio_dev, switch (dir) { case IIO_EV_DIR_RISING: return adxl313_set_act_inact_en(data, ADXL313_ACTIVITY, state); + case IIO_EV_DIR_FALLING: + return adxl313_set_act_inact_en(data, ADXL313_INACTIVITY, state); default: return -EINVAL; } @@ -512,6 +557,8 @@ static int adxl313_read_event_value(struct iio_dev *ind= io_dev, { struct adxl313_data *data =3D iio_priv(indio_dev); unsigned int act_threshold; + unsigned int inact_threshold; + unsigned int inact_time_s; int ret; =20 /* Measurement stays enabled, reading from regmap cache */ @@ -519,19 +566,38 @@ static int adxl313_read_event_value(struct iio_dev *i= ndio_dev, if (type !=3D IIO_EV_TYPE_MAG) return -EINVAL; =20 - if (info !=3D IIO_EV_INFO_VALUE) - return -EINVAL; - - switch (dir) { - case IIO_EV_DIR_RISING: + switch (info) { + case IIO_EV_INFO_VALUE: + switch (dir) { + case IIO_EV_DIR_RISING: + ret =3D regmap_read(data->regmap, + adxl313_act_thresh_reg[ADXL313_ACTIVITY], + &act_threshold); + if (ret) + return ret; + *val =3D act_threshold * 15625; + *val2 =3D MICRO; + return IIO_VAL_FRACTIONAL; + case IIO_EV_DIR_FALLING: + ret =3D regmap_read(data->regmap, + adxl313_act_thresh_reg[ADXL313_INACTIVITY], + &inact_threshold); + if (ret) + return ret; + *val =3D inact_threshold * 15625; + *val2 =3D MICRO; + return IIO_VAL_FRACTIONAL; + default: + return -EINVAL; + } + case IIO_EV_INFO_PERIOD: ret =3D regmap_read(data->regmap, - adxl313_act_thresh_reg[ADXL313_ACTIVITY], - &act_threshold); + ADXL313_REG_TIME_INACT, + &inact_time_s); if (ret) return ret; - *val =3D act_threshold * 15625; - *val2 =3D MICRO; - return IIO_VAL_FRACTIONAL; + *val =3D inact_time_s; + return IIO_VAL_INT; default: return -EINVAL; } @@ -555,16 +621,30 @@ static int adxl313_write_event_value(struct iio_dev *= indio_dev, if (type !=3D IIO_EV_TYPE_MAG) return -EINVAL; =20 - if (info !=3D IIO_EV_INFO_VALUE) - return -EINVAL; - - /* Scale factor 15.625 mg/LSB */ - regval =3D DIV_ROUND_CLOSEST(MICRO * val + val2, 15625); - switch (dir) { - case IIO_EV_DIR_RISING: - ret =3D regmap_write(data->regmap, - adxl313_act_thresh_reg[ADXL313_ACTIVITY], - regval); + switch (info) { + case IIO_EV_INFO_VALUE: + /* Scale factor 15.625 mg/LSB */ + regval =3D DIV_ROUND_CLOSEST(MICRO * val + val2, 15625); + switch (dir) { + case IIO_EV_DIR_RISING: + ret =3D regmap_write(data->regmap, + adxl313_act_thresh_reg[ADXL313_ACTIVITY], + regval); + if (ret) + return ret; + return adxl313_set_measure_en(data, true); + case IIO_EV_DIR_FALLING: + ret =3D regmap_write(data->regmap, + adxl313_act_thresh_reg[ADXL313_INACTIVITY], + regval); + if (ret) + return ret; + return adxl313_set_measure_en(data, true); + default: + return -EINVAL; + } + case IIO_EV_INFO_PERIOD: + ret =3D adxl313_set_inact_time_s(data, val); if (ret) return ret; return adxl313_set_measure_en(data, true); @@ -721,6 +801,17 @@ static int adxl313_push_event(struct iio_dev *indio_de= v, int int_stat) return ret; } =20 + if (FIELD_GET(ADXL313_INT_INACTIVITY, int_stat)) { + ret =3D iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, + IIO_MOD_X_AND_Y_AND_Z, + IIO_EV_TYPE_MAG, + IIO_EV_DIR_FALLING), + ts); + if (ret) + return ret; + } + if (FIELD_GET(ADXL313_INT_WATERMARK, int_stat)) { samples =3D adxl313_get_samples(data); if (samples < 0) @@ -895,6 +986,14 @@ int adxl313_core_probe(struct device *dev, if (ret) return ret; =20 + ret =3D regmap_write(data->regmap, ADXL313_REG_TIME_INACT, 5); + if (ret) + return ret; + + ret =3D regmap_write(data->regmap, ADXL313_REG_THRESH_INACT, 0x4f); + if (ret) + return ret; + ret =3D regmap_write(data->regmap, ADXL313_REG_THRESH_ACT, 0x52); if (ret) return ret; --=20 2.39.5