Re: [PATCH v5 2/2] iio: light: add AS7343 multi-spectral sensor driver

["Jose A. Perez de Azpillaga" <azpijr@gmail.com>]

On Sat, Sep 19, 2026 at 04:51:45PM -0700, Chang Yu wrote:
> +static int as7343_read_raw(struct iio_dev *indio_dev,
> +			   struct iio_chan_spec const *chan,
> +			   int *val, int *val2, long mask)
> +{
> +	struct as7343_data *data = iio_priv(indio_dev);
> +	struct regmap *map = data->regmap;
> +	struct device *dev = regmap_get_device(map);
> +	unsigned int unused;
> +	__le16 result;
> +	int ret;
> +
> +	PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
> +	ret = PM_RUNTIME_ACQUIRE_ERR(&pm);
> +	if (ret)
> +		return ret;
> +
> +	switch (mask) {
> +	case IIO_CHAN_INFO_RAW: {
> +		/* Wait until integration time passes for all 3 cycles. */
> +		msleep(160);

three integration periods hardcoded next to a hardcoded integration
time, so nothing keeps them in sync. make ATIME/ASTEP writable and the
fixed wait no longer covers a readout. as73211, which this is based on,
computes the timeout and polls NDATA. STATUS2 (0x90) bit 6 is AVALID is
defined and never read, does it cover all three cycles? the datasheet
does not say.

> +
> +		/*
> +		 * Reading ASTATUS latches all data registers to this read.
> +		 * We don't care about the returned saturation/gain status for
> +		 * now.
> +		 */
> +		guard(mutex)(&data->mutex);
> +
> +		ret = regmap_read(map, AS7343_ASTATUS_REG, &unused);
> +		if (ret)
> +			return ret;
> +
> +		ret = regmap_bulk_read(map, chan->address,
> +				       &result, sizeof(result));
> +		if (ret)
> +			return ret;
> +
> +		*val = le16_to_cpu(result);
> +		return IIO_VAL_INT;
> +	}
> +
> +	default:
> +		return -EINVAL;
> +	}
> +}
--
cheers, jose a. p-a