linux-kernel - Re: [PATCH v3 3/4] arm64: dts: qcom: Add base QDU1000/QRU1000 DTSIs

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Date:   Wed, 2 Nov 2022 12:25:26 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Melody Olvera <quic_molvera@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] arm64: dts: qcom: Add base QDU1000/QRU1000 DTSIs

On 31/10/2022 19:25, Melody Olvera wrote:
> 
> 
> On 10/31/2022 2:49 PM, Melody Olvera wrote:
>>
>> On 10/27/2022 8:21 AM, Krzysztof Kozlowski wrote:
>>> On 26/10/2022 16:04, Melody Olvera wrote:
>>>> Add the base DTSI files for QDU1000 and QRU1000 SoCs, including base
>>>> descriptions of CPUs, GCC, RPMHCC, QUP, TLMM, and interrupt-controller
>>>> to boot to shell with console on these SoCs.
>>>>
>>>> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
>>>> ---
>>>>  arch/arm64/boot/dts/qcom/qdu1000.dtsi | 1406 +++++++++++++++++++++++++
>>> Please use scripts/get_maintainers.pl to get a list of necessary people
>>> and lists to CC.  It might happen, that command when run on an older
>>> kernel, gives you outdated entries.  Therefore please be sure you base
>>> your patches on recent Linux kernel.
>> Sure thing; we talked about this on a different patch.
>>>>  arch/arm64/boot/dts/qcom/qru1000.dtsi |   27 +
>>>>  2 files changed, 1433 insertions(+)
>>>>  create mode 100644 arch/arm64/boot/dts/qcom/qdu1000.dtsi
>>>>  create mode 100644 arch/arm64/boot/dts/qcom/qru1000.dtsi
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/qdu1000.dtsi b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
>>>> new file mode 100644
>>>> index 000000000000..76474106e931
>>>> --- /dev/null
>>>> +++ b/arch/arm64/boot/dts/qcom/qdu1000.dtsi
>>>> @@ -0,0 +1,1406 @@
>>>> +// SPDX-License-Identifier: BSD-3-Clause
>>>> +/*
>>>> + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
>>>> + */
>>> (...)
>>>
>>>> +
>>>> +	soc: soc@0 {
>>>> +		#address-cells = <2>;
>>>> +		#size-cells = <2>;
>>>> +		ranges = <0 0 0 0 0x10 0>;
>>>> +		dma-ranges = <0 0 0 0 0x10 0>;
>>>> +		compatible = "simple-bus";
>>>> +
>>>> +		gcc: clock-controller@...00 {
>>>> +			compatible = "qcom,gcc-qdu1000", "syscon";
>>>> +			reg = <0x0 0x80000 0x0 0x1f4200>;
>>>> +			#clock-cells = <1>;
>>>> +			#reset-cells = <1>;
>>>> +			#power-domain-cells = <1>;
>>>> +			clocks = <&rpmhcc RPMH_CXO_CLK>, <&sleep_clk>;
>>>> +			clock-names = "bi_tcxo", "sleep_clk";
>>>> +		};
>>>> +
>>>> +		gpi_dma0: dma-controller@...000  {
>>>> +			compatible = "qcom,sm6350-gpi-dma";
>>> You should add here a specific compatible as well. Same in other places.
>>> All places. I had impression we talked about this few times, so I don't
>>> know what is missing on your side.
>>>
>>> This must be:
>>> "qcom,qdu1000-gpi-dma", "qcom,sm6350-gpi-dma"
>> Got it. I talked to Stephan and he said either your suggestion or just using
>> preexisting compatibles would be ok. I thought it might be cleaner to not
>> have the qdu compats, but I'm fine either way.
> Coming back to this, it looks like this will fail dtb_check since compatible field is too long.
> Is there an adjustment to the binding which needs to be made here?

Every compatible must be documented, so yes, bindings needs changes.

Best regards,
Krzysztof