linux-kernel - Re: [PATCH] ARM: dts: qcom: apq8026-samsung-matisse-wifi: Enable ADSP

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Date:   Mon, 28 Nov 2022 22:12:05 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Luca Weiss <luca@...tu.xyz>,
        Matti Lehtimäki <matti.lehtimaki@...il.com>,
        linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht
Cc:     phone-devel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: qcom: apq8026-samsung-matisse-wifi: Enable ADSP



On 28.11.2022 22:06, Luca Weiss wrote:
> On Montag, 28. November 2022 21:59:06 CET Konrad Dybcio wrote:
>> On 28.11.2022 18:01, Matti Lehtimäki wrote:
>>> On 28.11.2022 16.41, Konrad Dybcio wrote:
>>>> On 25.11.2022 23:34, Matti Lehtimäki wrote:
>>>>> diff --git a/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
>>>>> b/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts index
>>>>> 1c52337af560..859e91c16c61 100644
>>>>> --- a/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
>>>>> +++ b/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
>>>>> @@ -133,7 +133,8 @@ wcnss@...0000 {
>>>>>               no-map;
>>>>>           };
>>>>>   -        adsp@...0000 {
>>>>> +        /delete-node/ adsp@...0000;
>>>>
>>>> Please delete nodes by referencing the label like so:
>>>>
>>>> /delete-node/ &adsp_region;
>>>
>>> When I created the devicetree I was asked to do the opposite for the
>>> smem_region [1] which I had originally deleted using the label near top of
>>> the file but then moved next to the relevant node, where I cannot use
>>> label when deleting it. Should the smem_region also be moved to the top
>>> of the file if I move this delete-node there so the file would be
>>> consistent?
>> In [1] you were asked to move the delete-node statement, not to alter
>> the argument. Referencing nodes by label is allowed globally in the DTS.
>> The removal should stay inside reserved-memory.
> 
> Having e.g. this doesn't build, you get "syntax error" error
> 
>   reserved-memory {
>       /delete-node/ &venus_region;
>   };
> 
> Not sure exactly why, but that's the reason everything's outside of the root 
> node if you use labels (don't ask me why labels lead to syntax error but 
> specifying the name manually works)
> 
Hm.. The DT spec does not seem to limit where this syntax should work..
Perhaps it's a bug in DTC then.

Unless it does and I simply don't see it.

Konrad
>>
>> Konrad
>>
>>> [1]
>>> https://lore.kernel.org/linux-arm-msm/CAA8EJpqUH_v1GXEYF62Z3DBtFu_305_h4D
>>> 36aCnBr38bo5HoJw@...l.gmail.com/
> 
> 
> 
>