linux-kernel - Re: [PATCH v4 2/8] iio: adc: ad7606: move 'val' pointer to ad7606_scan

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Message-ID: <a7fd7490-53c9-4a25-a659-6f52ff509fe8@baylibre.com>
Date: Thu, 5 Sep 2024 16:37:17 -0500
From: David Lechner <dlechner@...libre.com>
To: Alexandru Ardelean <aardelean@...libre.com>, linux-iio@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc: jic23@...nel.org, krzk+dt@...nel.org, robh@...nel.org, lars@...afoo.de,
 michael.hennerich@...log.com, gstols@...libre.com
Subject: Re: [PATCH v4 2/8] iio: adc: ad7606: move 'val' pointer to
 ad7606_scan_direct()

On 9/5/24 3:23 AM, Alexandru Ardelean wrote:
> The ad7606_scan_direct() function returns 'int', which is fine for 16-bit
> samples.
> But when going to 18-bit samples, these need to be implemented as 32-bit
> (or int) type.
> 
> In that case when getting samples (which can be negative), we'd get random
> error codes.
> So, the easiest thing is to just move the 'val' pointer to
> 'ad7606_scan_direct()'. This doesn't qualify as a fix, it's just a
> preparation for 18-bit ADCs (of the AD7606 family).
> 
> Signed-off-by: Alexandru Ardelean <aardelean@...libre.com>
> ---

Reviewed-by: David Lechner <dlechner@...libre.com>