Re: [PATCH] ACPI: bus.c: Let acpi_device_get_match_data() return DT compatibility data

[Andy Shevchenko]

On Wed, Jul 4, 2018 at 12:31 AM, Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
> On Tue, Jul 3, 2018 at 9:09 AM, Nikolaus Voss
> <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx> 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.
>
> I'm not sure what you are trying to achieve here.
> This works solely for ACPI case.
> For PRP0001 (which is just a _temporary_ solution for device in
> question) we have special code path in SPI and I2C cores.
>
> https://elixir.bootlin.com/linux/v4.18-rc3/ident/acpi_driver_match_device

Just have to add, that PRP0001 is enumerated via OF per se.
It means the driver in question must have compatible strings and
MODULE_DEVICE_TABLE(of,...).
Also don't forget to enable CONFIG_OF in your kernel.

-- 
With Best Regards,
Andy Shevchenko