Re: [PATCH v2 2/4] PCI/pwrctrl: Add support for handling PCIe M.2 connectors

[Bartosz Golaszewski]

On Sat, Nov 8, 2025 at 4:23 AM Manivannan Sadhasivam
<manivannan.sadhasivam@xxxxxxxxxxxxxxxx> wrote:
>
> Add support for handling the PCIe M.2 connectors as Power Sequencing
> devices. These connectors are exposed as the Power Sequencing devices
> as they often support multiple interfaces like PCIe/SATA, USB/UART to the
> host machine and each interfaces could be driven by different client
> drivers at the same time.
>
> This driver handles the PCIe interface of these connectors. It first checks
> for the presence of the graph port in the Root Port node with the help of
> of_graph_is_present() API, if present, it acquires/poweres ON the
> corresponding pwrseq device.
>
> Once the pwrseq device is powered ON, the driver will skip parsing the Root
> Port/Slot resources and registers with the pwrctrl framework.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>