Messages in this thread | | | From | Andy Shevchenko <> | Date | Wed, 4 Jul 2018 13:24:14 +0300 | Subject | Re: [RFC PATCH] ACPI: bus: match of_device_id using acpi device |
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On Wed, Jul 4, 2018 at 1:17 PM, Nikolaus Voss <nikolaus.voss@loewensteinmedical.de> wrote: > On Wed, 4 Jul 2018, Sudeep Holla wrote: >> On 04/07/18 10:32, Andy Shevchenko wrote: >>> On Wed, Jul 4, 2018 at 6:37 AM, Srinath Mannam >>> <srinath.mannam@broadcom.com> wrote:
>> +1 on NACK for this and anything else that abuse PRP0001 as a short cut >> approach. > This is no abuse but exactly what PRP0001 is meant for. The basic idea of > PRP0001 is to reuse DT "compatible" strings in ACPI namespace, see > Documentation/acpi/enumeration.txt. Reusing also means getting access to the > of_device_id.
The idea was for almost DIY and / or manufacturer to develop a prototype without modifying match code and faking ACPI IDs. That's why the target of PRP0001 is almost sensors connected to I2C and SPI.
That's why I agreed on your patch to help with this. But! The proper solution for the devices (device manufacturer) is to allocate an ACPI ID and provide a corresponding table to the driver.
This is my understanding of that exercise. Rafael can correct me.
> Allocating an ACPI id for an already existing DT driver is redundant, isn't > it?
It is not.
-- With Best Regards, Andy Shevchenko
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