Re: [PATCH 0/2] input/serio: Add a firmware_id sysfs attribute

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On Fri, Mar 28, 2014 at 01:24:52AM -0700, Dmitry Torokhov wrote:
> On Fri, Mar 28, 2014 at 08:20:04AM +0000, Matthew Garrett wrote:
> > On Fri, Mar 28, 2014 at 12:56:55AM -0700, Dmitry Torokhov wrote:
> > 
> > > I am still unsure if we shoudl be adding these new IDs to serio core...
> > > Can't the X driver take a peek at ACPI devices on it's own?
> > 
> > In the (admittedly unlikely) event of multiple PS/2 trackpads, how do 
> > you know which one corresponds to which ACPI device?
> 
> So far I have not seen a single instance of a laptop with 2 touchpads
> and I doubt external PS/2 ones will ever make come back.

Right, we can hack around it based on what we've seen so far. But it 
seems more attractive to fix it in such a way that we won't behave 
inappropriately even if someone does do something utterly unexpected in 
future. For instance, some ARM devices have i8042-like serio - if the 
underlying device is exposed in device tree, it'd be nice to be able to 
expose that to userspace without having to modify the core X code.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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