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Dev/ltm4681 add LTM4681 and LTM4682#3085

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ivangilmercano wants to merge 2 commits intoanalogdevicesinc:mainfrom
ivangilmercano:dev/ltm4681
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Dev/ltm4681 add LTM4681 and LTM4682#3085
ivangilmercano wants to merge 2 commits intoanalogdevicesinc:mainfrom
ivangilmercano:dev/ltm4681

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@ivangilmercano ivangilmercano commented Jan 21, 2026

The LTM4681 is a quad 31.25A or single 125A stepdown μModule® (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus. While, LTM®4682 is a quad 31.25A or single 125A step-down power μModule® (power micromodule) DC/DC regulator featuring remote configurability and telemetry monitoring of power management parameters over PMBus.

PR Description

  • Commit 1 adds LTM4681 and LTM4682 to the dt-bindings of the existing LTC2978 driver
  • Commit 2 adds LTM4681 and LTM4682 driver support on the existing LTC2978 driver
  • Datasheets LTM4681, LTM4682

PR Type

  • Bug fix (a change that fixes an issue)
  • New feature (a change that adds new functionality)
  • Breaking change (a change that affects other repos or cause CIs to fail)

PR Checklist

  • I have conducted a self-review of my own code changes
  • I have compiled my changes, including the documentation
  • I have tested the changes on the relevant hardware
  • I have updated the documentation outside this repo accordingly
  • I have provided links for the relevant upstream lore

@ivangilmercano ivangilmercano changed the title Dev/ltm4681 Dev/ltm4681 add LTM4681 and LTM4682 Jan 21, 2026
@ivangilmercano ivangilmercano force-pushed the dev/ltm4681 branch 2 times, most recently from 7767524 to b23c2b3 Compare February 24, 2026 11:40
Add LTM4682 and LTM4681 to supported devices of LTC2978. Unlike other LTM46xx
devices, LTM4681 and LTM4682 is a μModule regulator that outputs four channels.

Signed-off-by: ivangilmercano <ivangil.mercano@analog.com>
Add support for LTM4681 and LTM4682. The LTM4681 an LTM4682 is a quad 31.25A and
single 125A, switching mode DC/DC step-down μModule regulator integrated with
4-channel power system manager.

This adds only the chip id, the checks for the manufacturer special id,
and the relevant attributes for the device's pmbus_driver_info.

Signed-off-by: ivangilmercano <ivangil.mercano@analog.com>
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