On Fri, 23 May 2025 22:35:13 +0000
Lothar Rubusch <l.rubusch@gmail.com> wrote:
> Add a scan_mask and scan_index to the iio channel. The scan_index
> prepares the buffer usage.
>
> Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Squash stuff that is only needed for buffer usage into the patch
that adds buffered support. This is a case where I'm not convinced
the code is complex enough to warrant a multi step approach.
> ---
> drivers/iio/accel/adxl313_core.c | 21 ++++++++++++++++-----
> 1 file changed, 16 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_core.c
> index 2f26da5857d4..9c2f3af1d19f 100644
> --- a/drivers/iio/accel/adxl313_core.c
> +++ b/drivers/iio/accel/adxl313_core.c
> @@ -171,9 +171,10 @@ static const int adxl313_odr_freqs[][2] = {
> [9] = { 3200, 0 },
> };
>
> -#define ADXL313_ACCEL_CHANNEL(index, axis) { \
> +#define ADXL313_ACCEL_CHANNEL(index, reg, axis) { \
> .type = IIO_ACCEL, \
> - .address = index, \
> + .scan_index = (index), \
> + .address = (reg), \
> .modified = 1, \
> .channel2 = IIO_MOD_##axis, \
> .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> @@ -187,10 +188,19 @@ static const int adxl313_odr_freqs[][2] = {
> }, \
> }
>
> +enum adxl313_chans {
> + chan_x, chan_y, chan_z,
> +};
> +
> static const struct iio_chan_spec adxl313_channels[] = {
> - ADXL313_ACCEL_CHANNEL(0, X),
> - ADXL313_ACCEL_CHANNEL(1, Y),
> - ADXL313_ACCEL_CHANNEL(2, Z),
> + ADXL313_ACCEL_CHANNEL(0, chan_x, X),
> + ADXL313_ACCEL_CHANNEL(1, chan_y, Y),
> + ADXL313_ACCEL_CHANNEL(2, chan_z, Z),
> +};
> +
> +static const unsigned long adxl313_scan_masks[] = {
> + BIT(chan_x) | BIT(chan_y) | BIT(chan_z),
> + 0
> };
>
> static int adxl313_set_odr(struct adxl313_data *data,
> @@ -419,6 +429,7 @@ int adxl313_core_probe(struct device *dev,
> indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->channels = adxl313_channels;
> indio_dev->num_channels = ARRAY_SIZE(adxl313_channels);
> + indio_dev->available_scan_masks = adxl313_scan_masks;
>
> ret = adxl313_setup(dev, data, setup);
> if (ret) {