[PATCH] riscv: dts: allwinner: d1: Add PMU event node

[Inochi Amaoto]

>>> On Sat, Aug 26, 2023 at 04:38:53PM +0800, Inochi Amaoto wrote:
>>>> D1 has several pmu events supported by opensbi.
>>>> These events can be used by perf for profiling.
>>>>
>>>> Signed-off-by: Inochi Amaoto <inochiama at outlook.com>
>>>
>>> Could you please include a link to some documentation as to where these
>>> values came from? I know several people have had some trouble with
>>> understanding the pmu DT stuff & having some documentation would make
>>> this an in-tree end-to-end example.
>
>> The DT field of riscv,pmu for opensbi can be found on:
>> https://github.com/riscv-software-src/opensbi/blob/master/docs/pmu_support.md
>
>There's an actual dt-binding for this.
>
>> The value can be found in the R1S0 version of C906 documentation:
>> https://dl.linux-sunxi.org/D1/Xuantie_C906_R1S0_User_Manual.pdf
>>
>> The meaning of T-HEAD events can be found in this patch:
>> https://lore.kernel.org/linux-perf-users/IA1PR20MB4953DD82D0116EC291C21777BBE2A@IA1PR20MB4953.namprd20.prod.outlook.com
>>
>> The patch above also provides documentation for T-HEAD events and a example
>> that shows how to use perf with T-HEAD events.
>
>What I meant was can you provide links to this in the commit messages so
>that people have a way to find the documentation.

OK, I will setup a new patch to cover these info.