Re: [PATCH v3 3/3] riscv: dts: starfive: add tdm node and sound card

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On 2023/5/10 16:33, Emil Renner Berthing wrote:
> On Tue, 9 May 2023 at 20:05, Conor Dooley <conor@xxxxxxxxxx> wrote:
>>
>> On Tue, May 09, 2023 at 08:52:48PM +0800, Walker Chen wrote:
>> > Hi Conor/Emil,
>> >
>> > DT overlay is used to describe combinations of VF2 and hat.
>> > Do you have any comments on this patch ?
>>
>> Up to Emil :)
>>
>> I seem to recall that he said at the linux-riscv sync-up call that we
>> have* that he was not in favour of overlays for hats like this.
>> I'll let him confirm that though, I might very well be misinterpreting or
>> misremembering what he said.
> 
> What probably meant was that I didn't want a bunch of different device
> trees for each combination board * hat. An overlay makes a lot more
> sense. However, looking through the kernel tree there is a surprising
> lack of overlays for hats committed already, so I suspect there is
> some sort of policy around overlays already in place.
Hi Emil,

About the specific usage of overlay for this board + hat, referenced to the following example in kernel:
linux/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-imx219.dtso
That board is connected with imx219 sensor via mipi_csi interface. That patch was accepted in 2022.

So do you think this way is feasible ?
Thanks!

Best regards,
Walker
 
> 
>> Cheers,
>> Conor.
>>
>> * https://lore.kernel.org/linux-riscv/mhng-775d4068-6c1e-48a4-a1dc-b4a76ff26bb3@palmer-ri-x1c9a/



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