linux-kernel - Re: [PATCH v2] ACPI: bus.c: Let acpi_device_get_match

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Date:   Tue, 24 Jul 2018 15:30:26 +0200 (CEST)
From:   Nikolaus Voss <nv@...n.de>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Xiongfeng Wang <xiongfeng.wang@...aro.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Ray Jui <ray.jui@...adcom.com>,
        Vladimir Olovyannikov <vladimir.olovyannikov@...adcom.com>,
        Vikram Prakash <vikram.prakash@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        Srinath Mannam <srinath.mannam@...adcom.com>,
        "Voss, Nikolaus" <Nikolaus.Voss@...wensteinmedical.de>
Subject: Re: [PATCH v2] ACPI: bus.c: Let acpi_device_get_match_data() return
 DT compatibility data

On Wed, 4 Jul 2018, Andy Shevchenko wrote:
> On Tue, Jul 3, 2018 at 9:09 AM, Nikolaus Voss <nv@...n.de> wrote:
>> When using ACPI with ACPI_DT_NAMESPACE_HID/ PRP0001 HID and referring to
>> of_device_id table "compatible" strings in DSD, a pointer to the
>> corresponding DT table entry should be returned instead of a null
>> pointer. An acpi_device_id match still takes precedence.
>>
>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
>
> with a caveat that this is only an improvement for a _temporary_
> PRP0001 users like I2C or SPI slave devices.
> Please, don't consider this change as a valid point to (ab)use PRP0001
> in a cases where devices are not "hotpluggable".

Will add the caveat and resend. Andy, thanks for reviewing!

Niko