[PATCH v7 00/16] arm64: mediatek: Add M.2 E-key slot on Chromebooks

[Chen-Yu Tsai]

Hi Mani,

On Fri, Jul 24, 2026 at 4:44 PM Chen-Yu Tsai <wenst at chromium.org> wrote:
>
> Hi everyone,
>
> This is v7 of my attempt at integrating the power sequencing API into
> the USB core to support the USB connection on M.2 E-key slots. M.2
> E-key was enabled in v7.1-rc1 with just PCIe and UART supported [1].
> Hopefully this is the last revision. However the pwrseq patches haven't
> been reviewed yet, and the fwnode patches need a review from the fwnode
> owners.
>

[...]

> Patch 12 adds matching pwrseq consumer by "port@" node to the M.2 slot
> driver. This is only used for the USB target, but there is no attempt
> to differentiate the connection type. The driver simply tries matching
> the "port@" node first, then falling back to the port parent or device's
> node.
>
> Patch 13 reworks the power sequencing targets for the E-key connector in
> the pcie-m2 driver to add targets for USB and SDIO. The former is used
> later on in this series.
>
> Patch 14 splits the Bluetooth power sequencing unit so that the USB and
> serdev consumers can separately toggle the actual state of W_DISABLE#2.
> This patch is purposefully not squashed into the previous one to provide
> a clear target for discussions.

[...]

>   power: sequencing: pcie-m2: support matching on remote "port" node
>   power: sequencing: pcie-m2: Add usb and sdio targets for E-key
>     connector
>   power: sequencing: pcie-m2: Split Bluetooth unit based on interface

Could you take a look at the pcie-m2 patches? These are the only ones
that haven't been reviewed.


Thanks
ChenYu