Re: [PATCH v2 2/5] PCI/pwrctl: Create pwrctl devices only if at least one power supply is present

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On Wed, Nov 6, 2024 at 10:28 PM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> On Fri, Oct 25, 2024 at 01:24:52PM +0530, Manivannan Sadhasivam via B4 Relay wrote:
> > From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> >
> > Currently, pwrctl devices are created if the corresponding PCI nodes are
> > defined in devicetree. But this is not correct, because not all PCI nodes
> > defined in devicetree require pwrctl support. Pwrctl comes into picture
> > only when the device requires kernel to manage its power state. This can
> > be determined using the power supply properties present in the devicetree
> > node of the device.
>
> > +bool of_pci_is_supply_present(struct device_node *np)
> > +{
> > +     struct property *prop;
> > +     char *supply;
> > +
> > +     if (!np)
> > +             return false;
>
> Why do we need to test !np here?  It should always be non-NULL.
>

Right, I think this can be dropped. We check for the OF node in the
function above.

Bart





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