linux-kernel - Re: [PATCH v12 9/9] iio: adc: ad4851: add ad485x driver

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Message-ID: <20250208162835.719e0638@jic23-huawei>
Date: Sat, 8 Feb 2025 16:28:35 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>
Cc: <robh@...nel.org>, <conor+dt@...nel.org>, <linux-iio@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <linux-pwm@...r.kernel.org>
Subject: Re: [PATCH v12 9/9] iio: adc: ad4851: add ad485x driver

On Fri, 7 Feb 2025 16:09:18 +0200
Antoniu Miclaus <antoniu.miclaus@...log.com> wrote:

> Add support for the AD485X a fully buffered, 8-channel simultaneous
> sampling, 16/20-bit, 1 MSPS data acquisition system (DAS) with
> differential, wide common-mode range inputs.
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
Hi Antoniu

One really trivial comment to add from me.

Jonathan

> diff --git a/drivers/iio/adc/ad4851.c b/drivers/iio/adc/ad4851.c
> new file mode 100644
> index 000000000000..01cc88ecad52
> --- /dev/null
> +++ b/drivers/iio/adc/ad4851.c
> @@ -0,0 +1,1316 @@


> +
> +static int ad4858_parse_channels(struct iio_dev *indio_dev)
> +{
> +	struct ad4851_state *st = iio_priv(indio_dev);
> +	struct device *dev = &st->spi->dev;
> +	struct iio_chan_spec *ad4851_channels;
> +	const struct iio_chan_spec ad4851_chan = AD4858_IIO_CHANNEL;
> +	int ret;
> +
> +	ret = ad4851_parse_channels_common(indio_dev, &ad4851_channels,
> +					   ad4851_chan);
> +	if (ret < 0)
> +		return ret;
> +
> +	device_for_each_child_node_scoped(dev, child) {
> +		ad4851_channels->has_ext_scan_type = 1;
> +		if (fwnode_property_read_bool(child, "bipolar")) {
> +			ad4851_channels->ext_scan_type = ad4851_scan_type_20_b;
> +			ad4851_channels->num_ext_scan_type = ARRAY_SIZE(ad4851_scan_type_20_b);
> +

Trivial but this blank line doesn't add anything useful and looks a bit odd!

> +		} else {
> +			ad4851_channels->ext_scan_type = ad4851_scan_type_20_u;
> +			ad4851_channels->num_ext_scan_type = ARRAY_SIZE(ad4851_scan_type_20_u);
> +		}
> +		ad4851_channels++;
> +	}
> +
> +	indio_dev->channels = ad4851_channels;
> +	indio_dev->num_channels = ret;
> +
> +	return 0;
> +}