On Mon, Jul 27, 2020 at 10:21:42AM -0600, Rob Herring wrote:
> On Tue, Jun 23, 2020 at 8:55 AM Thierry Reding <thierry.reding@gmail.com> wrote:
> >
> > From: Thierry Reding <treding@nvidia.com>
> >
> > The Tegra PCI controller driver doesn't need to control the PLL power
> > supplies directly, but rather uses the pads provided by the XUSB pad
> > controller, which in turn is responsible for supplying power to the
> > PLLs.
> >
> > Signed-off-by: Thierry Reding <treding@nvidia.com>
> > ---
> >  drivers/pci/controller/pci-tegra.c | 10 ++--------
> >  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> What's going to happen here with a new dtb and an old kernel? Is it
> going to error out due to missing supplies?

It's not going to error out but fallback to the "dummy" regulator, so
this should be fine from a forwards-compatibility point of view. Though
I didn't think we technically cared about that direction very much.

Thierry