Re: [PATCH v5 06/13] mmc: arm_pl180: Power down card supplies at OS handoff

Stephan Gerhold <[email protected]>
Newsgroups org.u-boot-project.lists.u-boot
Message-ID <[email protected]> 
On Sun, Aug 23, 2026 at 10:39:25PM +0200, Linus Walleij wrote:
> PL180 card supplies remain enabled after probing and while U-Boot is
> running. They are no longer needed once control is handed to the operating
> system.
> 
> Mark the driver for removal during OS preparation and disable its VMMC and
> VQMMC supplies from the remove callback.
> 
> Signed-off-by: Linus Walleij <[email protected]>

Is it worth briefly toggling the regulator off before Linux turns it on
again? Linux will typically need to turn them on again later during
boot, and even if not Linux should be able to deal with unused
regulators. I'm not sure it's worth adding such cleanup to U-Boot.

Thanks,
Stephan
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