Re: [PATCH 01/16] spi: armada-3700: Drop of_match_ptr for ID table

[Krzysztof Kozlowski]

On 13/03/2023 14:55, Mark Brown wrote:
> On Fri, Mar 10, 2023 at 11:28:42PM +0100, Krzysztof Kozlowski wrote:
>> The driver can match only via the DT table so the table should be always
>> used and the of_match_ptr does not have any sense (this also allows ACPI
>> matching via PRP0001, even though it is not relevant here).
>>
>>   drivers/spi/spi-armada-3700.c:807:34: error: ‘a3700_spi_dt_ids’ defined but not used [-Werror=unused-const-variable=]
> 
> It would be much better to fix of_match_ptr() and/or the module stuff
> that also references the match table here.

Why? The recommendation is in general not to use of_match_ptr, because
there are little benefits but it disables matching via PRP0001. Jonathan
in parallel thread explicitly said of_match_ptr should disappear and he
is not accepting any new code with it. And in general he is right.

https://lore.kernel.org/all/20230311183534.1d0dfd64@jic23-huawei/

and earlier:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=444f5f854b35

Best regards,
Krzysztof