Differential D14781

regulator: Disable unused regulator
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Authored by manu on Mar 21 2018, 9:16 AM.

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rS331989: regulator: Disable unused regulator

Summary

bootloaders such as u-boot might enable regulators, or simply regulators could be enabled by default by the PMIC, even if we don't have a driver for the device or subsystem.
Disable unused regulators just before going to userland.
A tunable hw.regulator.disable_unused is added to not disable them in case this causes problems on some board but the default behavior is to disable everything unused. I prefer to break thinks now and fix them rather than never switch to the case were we disable regulators.

Test Plan

Tested on : Pine64-LTS (an idle board goes from ~0.33A to ~0.27A)

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Repository

rS FreeBSD src repository - subversion

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Event Timeline

manu created this revision.Mar 21 2018, 9:16 AM

Herald added a subscriber: imp. · View Herald TranscriptMar 21 2018, 9:16 AM

Harbormaster completed remote builds in B15678: Diff 40529.Mar 21 2018, 9:16 AM

It would pay to add a comment to explain what the function is for.

Add comment explaining what the function does.

Harbormaster completed remote builds in B15680: Diff 40531.Mar 21 2018, 12:02 PM

This revision was not accepted when it landed; it landed in state Needs Review.Apr 4 2018, 6:44 AM

Closed by commit rS331989: regulator: Disable unused regulator (authored by manu). · Explain Why

This revision was automatically updated to reflect the committed changes.

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Path

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head/

sys/

dev/

extres/

regulator/

31 lines

Diff 41072

head/sys/dev/extres/regulator/regulator.c

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