linux-kernel - Re: [PATCH v2 1/3] iio: light: opt3001: add missing full-scale range value

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Message-ID: <20240914170622.227911f8@jic23-huawei>
Date: Sat, 14 Sep 2024 17:06:22 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Emil Gedenryd <emil.gedenryd@...s.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Andreas Dannenberg <dannenberg@...com>,
 <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <kernel@...s.com>
Subject: Re: [PATCH v2 1/3] iio: light: opt3001: add missing full-scale
 range value

On Fri, 13 Sep 2024 11:57:02 +0200
Emil Gedenryd <emil.gedenryd@...s.com> wrote:

> The opt3001 driver uses predetermined full-scale range values to
> determine what exponent to use for event trigger threshold values.
> The problem is that one of the values specified in the datasheet is
> missing from the implementation. This causes larger values to be
> scaled down to an incorrect exponent, effectively reducing the
> maximum settable threshold value by a factor of 2.
> 
> Add missing full-scale range array value.
> 
> Fixes: 94a9b7b1809f ("iio: light: add support for TI's opt3001 light sensor")
> Signed-off-by: Emil Gedenryd <emil.gedenryd@...s.com>
Applied to the fixes-togreg branch of iio.git and marked for stable.
I'll probably send a pull request with this in shortly after rc1.

Jonathan

> ---
>  drivers/iio/light/opt3001.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
> index 887c4b776a86..176e54bb48c3 100644
> --- a/drivers/iio/light/opt3001.c
> +++ b/drivers/iio/light/opt3001.c
> @@ -138,6 +138,10 @@ static const struct opt3001_scale opt3001_scales[] = {
>  		.val = 20966,
>  		.val2 = 400000,
>  	},
> +	{
> +		.val = 41932,
> +		.val2 = 800000,
> +	},
>  	{
>  		.val = 83865,
>  		.val2 = 600000,
>