linux-kernel - Re: [PATCH v5 3/5] iio: amplifiers: hmc425a: move conversion logic

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Date: Sat, 24 Feb 2024 17:42:46 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Dumitru Ceclan <mitrutzceclan@...il.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
 <conor+dt@...nel.org>, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Ceclan Dumitru
 <dumitru.ceclan@...log.com>
Subject: Re: [PATCH v5 3/5] iio: amplifiers: hmc425a: move conversion logic

On Tue, 20 Feb 2024 17:34:49 +0200
Dumitru Ceclan <mitrutzceclan@...il.com> wrote:

> Move gain-dB<->code conversion logic from read_raw and write_raw to
> chip_info callbacks.
> 
> Signed-off-by: Dumitru Ceclan <mitrutzceclan@...il.com>

I've made a small tweak whilst applying this one.

> @@ -100,36 +155,15 @@ static int hmc425a_write_raw(struct iio_dev *indio_dev,
>  			     int val2, long mask)
>  {

>  	mutex_lock(&st->lock);
>  	switch (mask) {
>  	case IIO_CHAN_INFO_HARDWAREGAIN:
> +		ret = gain_dB_to_code(st, val, val2, &code);
> +		if (ret)
> +			break;
>  		st->gain = code;
> -
Check your patches for unrelated white space changes.
They make things a little less reviewable and they create
noise in the history etc.

If you want to tidy up whitespace, a single patch just doing that
is the way to go.

>  		ret = hmc425a_write(indio_dev, st->gain);
>  		break;
>  	default:
> @@ -189,6 +223,8 @@ static struct hmc425a_chip_info hmc425a_chip_info_tbl[] = {
>  		.gain_min = -31500,
>  		.gain_max = 0,
>  		.default_gain = -0x40, /* set default gain -31.5db*/