On Wed, Feb 21, 2018 at 9:45 PM, Pierre Bourdon <delroth@xxxxxxxxxx> wrote:
> Ambient light sensor that supports visible light and IR measurements and
> configurable gain/integration time.
>
> Changed in v2:
> * Split off DT documentation change into a separate commit.
> * Use i2c's probe_new.
Btw, how big the difference with existing drivers?
> + default:
> + return -1;
Better to
return -EINVAL;
> + highest = max(visible, ir);
> +
> + /*
> + * If the read value is being clamped, assume the worst and go to the
> + * lowest possible gain. The alternative is doing multiple
> + * recalibrations, which would be slower and have the same effect.
> + */
> + if (highest == USHRT_MAX)
> + highest *= 128;
> + else
> + highest = (highest * 128) / bh1730_gain_multiplier(bh1730);
In both cases you multiply.
Why not just
highest = max(visible, ir) * 128;
if (highest < USHRT_MAX)
...
?
> + millilux = (u64)USEC_PER_MSEC * (visible_coef * visible - ir_coef * ir);
I'm not sure I understand how time units is related to lux one.
> + millilux /= bh1730_gain_multiplier(bh1730);
> + millilux *= 103;
> + millilux /= itime_us;
> + return millilux;
> +}
> + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*bh1730));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + indio_dev->dev.parent = &client->dev;
Strange, it's not done in IIO core... Jonathan, is it true that in
case of devm_iio_device_alloc() all drivers use supplied struct device
as a parent one?
If so, doesn't make sense to modify IIO core to do this?
> +static int bh1730_remove(struct i2c_client *client)
> +{
> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct bh1730_data *bh1730 = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
Hmm... Do you still need this even with devm IIO in ->probe()?
> +#ifdef CONFIG_OF
> +#endif
This...
> + .of_match_table = of_match_ptr(of_bh1730_match),
...and of_match_ptr() now pointless.
--
With Best Regards,
Andy Shevchenko
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