From 3b579e3178a37ce190fc998014d0613e053b384b Mon Sep 17 00:00:00 2001 From: Jagath Jog J Date: Sat, 19 Mar 2022 23:40:22 +0530 Subject: [PATCH] iio: accel: bma400: Add separate channel for step counter Added channel for step counter which can be enable or disable through the sysfs interface. Signed-off-by: Jagath Jog J --- drivers/iio/accel/bma400.h | 1 + drivers/iio/accel/bma400_core.c | 47 ++++++++++++++++++++++++++++++--- 2 files changed, 44 insertions(+), 4 deletions(-) diff --git a/drivers/iio/accel/bma400.h b/drivers/iio/accel/bma400.h index b306a5ad513a19..65bbc80cbb7f46 100644 --- a/drivers/iio/accel/bma400.h +++ b/drivers/iio/accel/bma400.h @@ -53,6 +53,7 @@ #define BMA400_STEP_CNT1_REG 0x16 #define BMA400_STEP_CNT3_REG 0x17 #define BMA400_STEP_STAT_REG 0x18 +#define BMA400_STEP_INT_MSK BIT(0) /* * Read-write configuration registers diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c index 797403c7dd85a0..305643e99eb569 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -68,6 +68,7 @@ struct bma400_data { int oversampling_ratio; int scale; struct iio_trigger *trig; + int steps_enabled; /* Correct time stamp alignment */ struct { __be16 buff[3]; @@ -202,6 +203,13 @@ static const struct iio_chan_spec bma400_channels[] = { .endianness = IIO_LE, }, }, + { + .type = IIO_STEPS, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_ENABLE), + .scan_index = -1, /* No buffer support */ + }, + IIO_CHAN_SOFT_TIMESTAMP(4), }; @@ -686,13 +694,28 @@ static int bma400_read_raw(struct iio_dev *indio_dev, { struct bma400_data *data = iio_priv(indio_dev); int ret; + u32 steps_raw; switch (mask) { case IIO_CHAN_INFO_PROCESSED: - mutex_lock(&data->mutex); - ret = bma400_get_temp_reg(data, val, val2); - mutex_unlock(&data->mutex); - return ret; + switch (chan->type) { + case IIO_STEPS: + mutex_lock(&data->mutex); + ret = regmap_bulk_read(data->regmap, BMA400_STEP_CNT0_REG, + &steps_raw, 3 * sizeof(u8)); + mutex_unlock(&data->mutex); + if (ret) + return ret; + *val = steps_raw & 0x00FFFFFF; + return IIO_VAL_INT; + case IIO_TEMP: + mutex_lock(&data->mutex); + ret = bma400_get_temp_reg(data, val, val2); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } case IIO_CHAN_INFO_RAW: mutex_lock(&data->mutex); ret = bma400_get_accel_reg(data, chan, val); @@ -733,6 +756,9 @@ static int bma400_read_raw(struct iio_dev *indio_dev, *val = data->oversampling_ratio; return IIO_VAL_INT; + case IIO_CHAN_INFO_ENABLE: + *val = data->steps_enabled; + return IIO_VAL_INT; default: return -EINVAL; } @@ -798,6 +824,17 @@ static int bma400_write_raw(struct iio_dev *indio_dev, ret = bma400_set_accel_oversampling_ratio(data, val); mutex_unlock(&data->mutex); return ret; + case IIO_CHAN_INFO_ENABLE: + if (data->steps_enabled == val) + return 0; + + mutex_lock(&data->mutex); + ret = regmap_update_bits(data->regmap, BMA400_INT_CONFIG1_REG, + BMA400_STEP_INT_MSK, + FIELD_PREP(BMA400_STEP_INT_MSK, !!val)); + mutex_unlock(&data->mutex); + data->steps_enabled = val; + return ret; default: return -EINVAL; } @@ -814,6 +851,8 @@ static int bma400_write_raw_get_fmt(struct iio_dev *indio_dev, return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: return IIO_VAL_INT; + case IIO_CHAN_INFO_ENABLE: + return IIO_VAL_INT; default: return -EINVAL; }