linux-kernel - Re: [PATCH 1/2] iio: adc128s052: allow driver to be matched using ACPI

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Date:   Tue, 24 Apr 2018 18:23:30 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Javier Arteaga <javier@...tex.com>
CC:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Dan O'Donovan <dan@...tex.com>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] iio: adc128s052: allow driver to be matched using
 ACPI

On Sat, 21 Apr 2018 21:41:57 +0100
Javier Arteaga <javier@...tex.com> wrote:

> Hi Jonathan,
> 
> On Sat, Apr 21, 2018 at 04:54:41PM +0100, Jonathan Cameron wrote:
> > I don't really see the connection between the change in here
> > and what the description says...  
> 
> I think you're right, we didn't make our intent clear here.
> 
> > If you are probing from ACPI then there is no need to ensure
> > a valid of table is supplied (even if we aren't building with OF)
> > which is what I think this patch is trying to do...  
> 
> The patch enables ACPI _DSD to reuse existing DT "compatible" strings,
> as described in Documentation/acpi/enumeration.txt, even without OF.
> This kind of patch has some precedent, like for example:
> 
>     01427fe7c4b9 ("Input: adxl34x - make it enumerable in ACPI environment")
> 
> To clarify, for the UP2 board we don't actually need this patch as we
> have an ACPI _HID - just thought it would might be an improvement for
> others.
> 
> I'll improve the description and perhaps reorder this patch last for v2.
> Or I can send separately if you prefer.
> 
> Thanks for your review!
Unless we know of ACPI firmwares out there that are doing this, drop the
patch for now.  I don't want to see a flood of these based on a 'you can
do it that' way argument.

Jonathan

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