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SubjectRe: [RFC PATCH 0/9] Add support for Microsoft Surface System Aggregator Module
On 9/24/20 10:30 AM, Andy Shevchenko wrote:
> On Wed, Sep 23, 2020 at 6:32 PM Arnd Bergmann <> wrote:
>> On Wed, Sep 23, 2020 at 5:15 PM Maximilian Luz <> wrote:
>>> Hello,
>>> The Surface System Aggregator Module (we'll refer to it as Surface
>>> Aggregator or SAM below) is an embedded controller (EC) found on various
>>> Microsoft Surface devices. Specifically, all 4th and later generation
>>> Surface devices, i.e. Surface Pro 4, Surface Book 1 and later, with the
>>> exception of the Surface Go series and the Surface Duo. Notably, it
>>> seems like this EC can also be found on the ARM-based Surface Pro X [1].
>> I think this should go to drivers/platform/x86 or drivers/platform/surface/
>> along with other laptop vendor specific code rather than drivers/misc/.
> +1 here. drivers/platform/surface is a good place to start.
> And you may begin with moving a few Surface drivers out of PDx86 to
> the new folder.

Perfect, thanks! I'll draft up a patch series over the weekend.

A couple questions regarding structure and maintenance:

- Should I CC the platform-driver-x86 list on future submissions to
drivers/platform/surface? I.e. is this something you would want to
review if it doesn't touch the drivers/platform/x86 directory?

- How would you want the layout to be, specifically regarding to the
surface-aggregator stuff? My suggestion would be simply:

... (all core stuff built into the surface_aggregator module)
surface_*.c (any other surface platform driver as well
as drivers dependent on surface_aggregator)

- Regarding future things like HID transport driver, battery/AC driver:
Submit them to drivers/platform/surface or to their respective
subsystem directories?


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