From: bugzilla-daemon@kernel.org
To: linux-iio@vger.kernel.org
Subject: [Bug 220543] New: MCP3428 scaling values are incorrect, three orders of magnitude low
Date: Sat, 06 Sep 2025 23:42:16 +0000 [thread overview]
Message-ID: <bug-220543-217253@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=220543
Bug ID: 220543
Summary: MCP3428 scaling values are incorrect, three orders of
magnitude low
Product: Drivers
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: IIO
Assignee: drivers_iio@kernel-bugs.kernel.org
Reporter: phil@munts.net
Regression: No
The values for in_voltageY_scale that the 6.12 kernel generates for the MCP3428
ADC are too low by a factor of 1000.
The ADS1115 and the MCP3204 get in_voltageY_scale values around 1.0 (implying
millivolts per ADC step) while the MCP3428 gets values around 0.001 and lower
(implying microvolts per ADC step).
See also: https://forums.raspberrypi.com/viewtopic.php?t=391674
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next reply other threads:[~2025-09-06 23:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-06 23:42 bugzilla-daemon [this message]
2025-09-28 10:59 ` [Bug 220543] New: MCP3428 scaling values are incorrect, three orders of magnitude low Jonathan Cameron
2025-09-28 10:59 ` [Bug 220543] " bugzilla-daemon
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