[linux-sunxi] [PATCH RESEND v3] arm64: dts: allwinner: a64: olinuxino: Enable audio

[Philip Rinn]

Hi,

On 13.01.22 at 07:59, Jernej Škrabec wrote:
> Hi,
> 
> Dne sreda, 12. januar 2022 ob 16:29:51 CET je Philip Rinn napisal(a):
>> Hi,
>>
>> On 12.01.22 at 10:09, Priit Laes wrote:
>>
>>> On Tue, Jan 11, 2022 at 09:08:23PM +0100, 'Philip Rinn' via linux-sunxi
>>> wrote:
>>
>>>> Enable the audio hardware on the Olimex A64-OLinuXino board family.
>>>> Tested on the A64-OLinuXino-2Ge8G-IND variant.
>>>
>>>
>>> I have similar patch in one of my "long forgotten branches", but I'm not
>>> 100%
>>> sure whether the cpvdd-supply is required for codec_analog. IIRC,
>>> sound worked for me without the issues on A64-Olinuxino board (Rev D).
>>>
>>> 'cpvdd-supply = <&reg_eldo1>' for codec_analog
>>
>>
>> I didn't test it without but as it is present for all other a64 board with
>> audio and also in Olimex' tree I think it is needed.
> 
> It's not question if it works with or without it, nor if other boards have it
> or not. Only deciding factor is board design. On schematic it can be seen that
> cpvdd is connected to eldo1, so having this property is correct, mandatory
> even.

Very true and it's easy to verify with the schematic available: https://raw.githubusercontent.com/OLIMEX/OLINUXINO/master/HARDWARE/A64-OLinuXino/1.%20Latest%20hardware%20revision/A64-OLinuXino%20hardware%20revision%20E/A64-OlinuXino_Rev_E.pdf

So from my point of view the patch is correct.

Best regards
Philip

> 
> Best regards,
> Jernej
>   
>>
>>> And we also need to enable these configuration options in the defconfig:
>>>
>>> +CONFIG_SND_SUN8I_CODEC=m
>>> +CONFIG_SND_SUN50I_CODEC_ANALOG=m
>>
>>
>> Hm, probably, but why wasn't it added when audio was added for the other a64
>> boards? Or are we talking about different defconfigs here?
>   
>> Best regards
>> Philip
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