On 18. Feb 2023, at 00:22, Saravana Kannan <saravanak@xxxxxxxxxx> wrote: > > On Thu, Aug 25, 2022 at 2:28 PM Christian Kohlschütter > <christian@xxxxxxxxxxxxxxxx> wrote: >> >> Previously, an unresolved regulator supply reference upon calling >> regulator_register on an always-on or boot-on regulator caused >> set_machine_constraints to be called twice. >> >> This in turn may initialize the regulator twice, leading to voltage >> glitches that are timing-dependent. A simple, unrelated configuration >> change may be enough to hide this problem, only to be surfaced by >> chance. > > In your case, can you elaborate which part of the constraints/init > twice caused the issue? > > I'm trying to simplify some of the supply resolving code and I'm > trying to not break your use case. > > -Saravana Here's a write-up of my use case, and how we got to the solution: https://kohlschuetter.github.io/blog/posts/2022/10/28/linux-nanopi-r4s/
