Re: [PATCH v3 3/4] iio: light: veml6031x00: add support for triggered buffers

[Jonathan Cameron <jic23@kernel.org>]

On Sun, 24 May 2026 23:53:57 +0200
Javier Carrasco <javier.carrasco.cruz@gmail.com> wrote:

> Add triggered buffer functionality for the two channels the device
> provides (ALS and IR).
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Trivial stuff only.
> diff --git a/drivers/iio/light/veml6031x00.c b/drivers/iio/light/veml6031x00.c
> index 50979d239230..9968d4414dc9 100644
> --- a/drivers/iio/light/veml6031x00.c
> +++ b/drivers/iio/light/veml6031x00.c

> +
> +static int veml6031x00_buffer_postdisable(struct iio_dev *iio)
> +{
> +	struct veml6031x00_data *data = iio_priv(iio);
> +
> +	pm_runtime_put_autosuspend(data->dev);
> +
> +	return 0;
> +}
> +
> +static const struct iio_buffer_setup_ops veml6031x00_buffer_setup_ops = {
> +	.preenable = veml6031x00_buffer_preenable,
> +	.postdisable = veml6031x00_buffer_postdisable,
> +};
> +
> +static irqreturn_t veml6031x00_trig_handler(int irq, void *p)
> +{
> +	struct iio_poll_func *pf = p;
> +	struct iio_dev *iio = pf->indio_dev;
> +	struct veml6031x00_data *data = iio_priv(iio);
> +	int ch, ret, i = 0;
> +	struct {
> +		__le16 chans[2];
> +		aligned_s64 timestamp;
> +	} scan = { };
> +
> +	if (*iio->active_scan_mask == (BIT(VEML6031X00_SCAN_ALS) |
> +				       BIT(VEML6031X00_SCAN_IR))) {
I'd prefer we always treat that as a bitmap and do the more costly check
test_bit(VEML6041X00_SCAN_ALS, iio->active_scan_mask) &&
test_bit(VEML6041X00_SCAN_IR, iio->active_scan_mask)
 

> +		ret = regmap_bulk_read(data->regmap,
> +				       VEML6031X00_REG_ALS_L,
> +				       &scan.chans, sizeof(scan.chans));
> +		if (ret)
> +			goto done;
> +	} else {
> +		iio_for_each_active_channel(iio, ch) {
> +			ret = regmap_bulk_read(data->regmap,
> +					       iio->channels[ch].address,
> +					       &scan.chans[i++],
> +					       sizeof(*scan.chans));
> +			if (ret)
> +				goto done;
> +		}
> +	}
> +
> +	iio_push_to_buffers_with_ts(iio, &scan, sizeof(scan), pf->timestamp);
> +
> +done:
> +	iio_trigger_notify_done(iio->trig);
> +
> +	return IRQ_HANDLED;
> +}