On Thu, Sep 12, 2024 at 04:15:56PM +0200, Konrad Dybcio wrote: > On 12.09.2024 3:39 PM, Qiang Yu wrote: > > > > On 9/11/2024 11:32 PM, Manivannan Sadhasivam wrote: > >> On Wed, Sep 11, 2024 at 04:17:41PM +0800, Qiang Yu wrote: > >>> On 8/28/2024 12:58 AM, Manivannan Sadhasivam wrote: > >>>> On Tue, Aug 27, 2024 at 02:44:09PM +0300, Dmitry Baryshkov wrote: > >>>>> On Tue, 27 Aug 2024 at 09:36, Qiang Yu <quic_qianyu@xxxxxxxxxxx> wrote: > >>>>>> On platform x1e80100 QCP, PCIe3 is a standard x8 form factor. Hence, add > >>>>>> support to use 3.3v, 3.3v aux and 12v regulators. > >>>>> First of all, I don't see corresponding bindings change. > >>>>> > >>>>> Second, these supplies power up the slot, not the host controller > >>>>> itself. As such these supplies do not belong to the host controller > >>>>> entry. Please consider using the pwrseq framework instead. > >>>>> > >>>> Indeed. For legacy reasons, slot power supplies were populated in the host > >>>> bridge node itself until recently Rob started objecting it [1]. And it makes > >>>> real sense to put these supplies in the root port node and handle them in the > >>>> relevant driver. > >>>> > >>>> I'm still evaluating whether the handling should be done in the portdrv or > >>>> pwrctl driver, but haven't reached the conclusion. Pwrctl seems to be the ideal > >>>> choice, but I see a few issues related to handling the OF node for the root > >>>> port. > >>>> > >>>> Hope I'll come to a conclusion in the next few days and will update this thread. > >>>> > >>>> - Mani > >>>> > >>>> [1] https://lore.kernel.org/lkml/20240604235806.GA1903493-robh@xxxxxxxxxx/ > >>> Hi Mani, do you have any updates? > >>> > >> I'm working with Bartosz to add a new pwrctl driver for rootports. And we are > >> debugging an issue currently. Unfortunately, the progress is very slow as I'm on > >> vacation still. > >> > >> Will post the patches once it got resolved. > >> > >> - Mani > > OK, thanks for your update. > > Qiang, you can still resubmit the rest of the patches without having > to wait on that to be resolved > In that case, the slot supplies should be described in the PCIe bridge. - Mani > Konrad -- மணிவண்ணன் சதாசிவம்
