Re: [RESEND PATCH v1 0/5] Solve postboot supplier cleanup and optimize probe ordering

From: Saravana Kannan
Date: Thu Jun 27 2019 - 22:37:25 EST

On Wed, Jun 26, 2019 at 2:31 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote:
> On Mon, Jun 24, 2019 at 9:54 PM Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On Mon, Jun 24, 2019 at 03:37:07PM -0700, Sandeep Patil wrote:
> > > We are trying to make sure that all (most) drivers in an Aarch64 system can
> > > be kernel modules for Android, like any other desktop system for
> > > example. There are a number of problems we need to fix before that happens
> > > ofcourse.
> >
> > I will argue that this is NOT an android-specific issue. If the goal of
> > creating an arm64 kernel that will "just work" for a wide range of
> > hardware configurations without rebuilding is going to happen, we need
> > to solve this problem with DT. This goal was one of the original wishes
> > of the arm64 development effort, let's not loose sight of it as
> > obviously, this is not working properly just yet.
> I fail to see how the different Linux behavior between drivers
> built-in and as modules has anything whatsoever to do with DT.

You are right, built-in vs module problem is not a DT issue. But this
is not so much a built-in vs module issue. It's just that built-in has
a hack available that works sometimes. But really, both are broken.

> Fix the
> problems in Linux and use the dependencies that are already expressed
> in DT and *then* we can talk about using DT to provide *hints* for
> solving any remaining problems.

Done. Sent v2 patch series that uses existing bindings.