[PATCH 0/7] PCI: mediatek-gen3: add power control support

[Chen-Yu Tsai]

On Wed, Feb 25, 2026 at 9:25 PM Manivannan Sadhasivam <mani at kernel.org> wrote:
>
> On Wed, Feb 25, 2026 at 03:22:17PM +0800, Chen-Yu Tsai wrote:
> > Hi folks,
> >
> > This series adds power control support to the MediaTek PCIe gen3
> > controller driver. This allows proper modeling of WiFi and NVMe
> > adapters in the device tree and control over their power supplies.
> >
> > Patch 1 through 4 are cleanups and minor improvements to the driver.
> >
> > Patch 5 adds power control support using the new pwrctrl API to the
> > PCIe controller driver.
> >
> > Patch 6 adds the WiFi and BT power supplies for the MT8195 Cherry design.
> > This is actually a M.2 E-key slot, but support for that is still WIP [1].
> > And even with it merged, support for the USB side still needs to be
> > figured out.
> >
> > We can either merge this as is for now, and do another conversion later,
> > or just keep this one out. However this is still an improvement over
> > the current device tree, in which the power for the slot is always on
> > using a pinctrl setting.
> >
> > Patch 7 adds the M.2 M-key NVMe slot found on MT8195 Dojo Chromebooks.
> > This change actually makes use of the M.2 pwrseq driver.
> >
>
> Thanks a lot for doing this! I'll also try to get the Key E support for v7.1.

Ack. I'll try to look into how to hook up USB for Key E.

> For the whole series,
>
> Reviewed-by: Manivannan Sadhasivam <mani at kernel.org>
>
> - Mani
>
> >
> > Please have a look.
> >
> >
> > Thanks
> > ChenYu
> >
> > [1] https://lore.kernel.org/linux-pci/20260224-pci-m2-e-v5-0-dd9b9501d33c@oss.qualcomm.com/
> >
> > Chen-Yu Tsai (7):
> >   PCI: mediatek-gen3: Clean up mtk_pcie_parse_port() with
> >     dev_err_probe()
> >   PCI: mediatek-gen3: Add error path for probe and resume driver
> >     callbacks
> >   PCI: mediatek-gen3: Split out device power helpers
> >   PCI: mediatek-gen3: Disable device if further setup fails
> >   PCI: mediatek-gen3: Integrate new pwrctrl API
> >   arm64: dts: mediatek: mt8195-cherry: add WiFi PCIe and BT USB power
> >     supplies
> >   arm64: dts: mediatek: mt8195-cherry-dojo: Describe M.2 M-key NVMe slot
> >
> >  .../dts/mediatek/mt8195-cherry-dojo-r1.dts    |  38 ++++
> >  .../boot/dts/mediatek/mt8195-cherry.dtsi      |  47 +++--
> >  drivers/pci/controller/pcie-mediatek-gen3.c   | 185 +++++++++++-------
> >  3 files changed, 183 insertions(+), 87 deletions(-)
> >
> > --
> > 2.53.0.414.gf7e9f6c205-goog
> >
>
> --
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