Re: [PATCH v2 0/9] Add support for Microsoft Surface System Aggregator Module

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On Sun, Dec 06, 2020 at 09:07:05AM +0200, Leon Romanovsky wrote:
> On Thu, Dec 03, 2020 at 10:26:31PM +0100, Maximilian Luz wrote:
> > Hello,
> >
> > Here is version two of the Surface System Aggregator Module (SAM/SSAM)
> > driver series, adding initial support for the embedded controller on 5th
> > and later generation Microsoft Surface devices. Initial support includes
> > the ACPI interface to the controller, via which battery and thermal
> > information is provided on some of these devices.
> >
> > The previous version and cover letter detailing what this series is
> > about can be found at
> >
> >   https://lore.kernel.org/platform-driver-x86/20201115192143.21571-1-luzmaximilian@xxxxxxxxx/
> >
> > This patch-set can also be found at the following repository and
> > reference, if you prefer to look at a kernel tree instead of these
> > emails:
> >
> >   https://github.com/linux-surface/kernel tags/s/surface-aggregator/v2
> >
> > Thank you all for the feedback to v1, I hope I have addressed all
> > comments.
> 
> 
> I think that it is too far fetched to attempt and expose UAPI headers
> for some obscure char device that we are all know won't be around in
> a couple of years from now due to the nature of how this embedded world
> works.

No, that's not ok, we do this for loads of devices out there.  If there
is a device that wants to be supported for Linux, and a developer that
wants to support it, we will take it.

> More on that, the whole purpose of proposed interface is to debug and
> not intended to be used by any user space code.

I thought that debugfs was going to be used for most of the debugging
code, or has that changed in newer versions of this patchset?

thanks,

greg k-h



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