linux-kernel - [PATCH v3 1/3] iio: light: opt3001: add missing full-scale range value

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Message-ID: <20240916-add_opt3002-v3-1-984b190cd68c@axis.com>
Date: Mon, 16 Sep 2024 16:56:37 +0200
From: Emil Gedenryd <emil.gedenryd@...s.com>
To: Jonathan Cameron <jic23@...nel.org>, 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>
CC: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, Emil Gedenryd <emil.gedenryd@...s.com>,
	<kernel@...s.com>
Subject: [PATCH v3 1/3] iio: light: opt3001: add missing full-scale range
 value

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>
---
 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,

-- 
2.39.2