On Sun, 17 Nov 2024 18:26:45 +0000
Lothar Rubusch <l.rubusch@xxxxxxxxx> wrote:
> Add trigger options to the sensor driver. Reacting to the sensor events
> communicated by IRQ, the FIFO handling and the trigger will be core
> events for further feature implementation.
>
> Signed-off-by: Lothar Rubusch <l.rubusch@xxxxxxxxx>
> ---
> drivers/iio/accel/adxl345_core.c | 34 ++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
> index 82bd5c2b78..d58e1994ff 100644
> --- a/drivers/iio/accel/adxl345_core.c
> +++ b/drivers/iio/accel/adxl345_core.c
> @@ -15,6 +15,9 @@
>
> #include <linux/iio/iio.h>
> #include <linux/iio/sysfs.h>
> +#include <linux/iio/buffer.h>
> +#include <linux/iio/events.h>
> +#include <linux/iio/kfifo_buf.h>
> #include <linux/iio/trigger.h>
> #include <linux/iio/trigger_consumer.h>
> #include <linux/iio/triggered_buffer.h>
> @@ -140,11 +143,13 @@ struct adxl34x_state {
> const struct adxl345_chip_info *info;
> struct regmap *regmap;
> struct adxl34x_platform_data data; /* watermark, fifo_mode, etc */
> + struct iio_trigger *trig_dready;
>
> __le16 fifo_buf[3 * ADXL34x_FIFO_SIZE] __aligned(IIO_DMA_MINALIGN);
> u8 int_map;
> bool fifo_delay; /* delay: delay is needed for SPI */
> u8 intio;
> + bool watermark_en;
> };
>
> #define ADXL34x_CHANNEL(index, reg, axis) { \
> @@ -432,6 +437,35 @@ static int adxl345_get_status(struct adxl34x_state *st, u8 *int_stat)
> return 0;
> }
>
> +/* data ready trigger */
Data ready is a term used for a single sample being ready.
Rename this as watermark.
However, as before I'd just get rid of the trigger entirely as it's not useful.
> +
> +static int adxl345_trig_dready(struct iio_trigger *trig, bool state)
> +{
> + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
> + struct adxl34x_state *st = iio_priv(indio_dev);
> +
> + st->int_map = 0x00;
> + if (state) {
> + /* Setting also ADXL345_INT_DATA_READY results in just a single
> + * generated interrupt, and no continuously re-generation. NB that the
> + * INT_DATA_READY as well as the INT_OVERRUN are managed automatically,
> + * setting their bits here is not needed.
> + */
> + if (st->watermark_en)
> + st->int_map |= ADXL345_INT_WATERMARK;
> +
> + pr_debug("%s(): preparing st->int_map 0x%02X\n",
> + __func__, st->int_map);
> + }
> +
> + return 0;
> +}
> +
> +static const struct iio_trigger_ops adxl34x_trig_dready_ops = {
> + .validate_device = &iio_trigger_validate_own_device,
> + .set_trigger_state = adxl345_trig_dready,
> +};
> +
> /**
> * irqreturn_t adxl345_trigger_handler() - Interrupt handler used for several
> * features of the ADXL345.
