linux-kernel - Re: [PATCH] Documentation: acpi: Add an example for PRP0001

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Message-ID: <d67bb260-863c-1131-1323-711c3d2e227d@codethink.co.uk>
Date:   Mon, 25 Mar 2019 14:42:09 +0000
From:   Thomas Preston <thomas.preston@...ethink.co.uk>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Documentation: acpi: Add an example for PRP0001

Hi,
Thanks for looking at this.

On 25/03/2019 13:04, Andy Shevchenko wrote:
> On Mon, Mar 25, 2019 at 01:51:18PM +0200, Andy Shevchenko wrote:
>> On Mon, Mar 25, 2019 at 10:31:13AM +0100, Rafael J. Wysocki wrote:
>>> On Fri, Mar 22, 2019 at 2:47 PM Thomas Preston
>>> <thomas.preston@...ethink.co.uk> wrote:
>>>>
>>>> Add an example for the magic PRP0001 device ID which allows matching
>>>> ACPI devices against drivers using OF Device Tree compatible property.
>>>> It wasn't clear to me that PRP0001 could be used in _CID.
>>>
>>> Mika, Andy, can you have a look at this, please?
>>
>> Good to me,
>> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>>
>> Though one thing I would like to add (not directly related to the patch
>> per se), i.e. it would be nice to keep such examples under meta-acpi [1]
>> umbrella as a database for such excerpts.
>>
>> Thomas, can you do that?
>>
>> [1]: https://github.com/westeri/meta-acpi

I will :)

>>
>>>> +               Name (_HID, "TITMP75") /* _HID will appear in sysfs */
> 
> Sorry for not noticing earlier.
> 
> Is this an official ID for the chip? We discourage people to invent ACPI IDs on
> their own.
> 
> 

The device is a TI tmp75b temperature sensor [0]. The HID is completely
made up, I'm afraid. It doesn't exist in the registry.

[0] http://www.ti.com/lit/ds/symlink/tmp75b.pdf