linux-kernel - Re: [PATCH 2/2] clk: qcom: restrict drivers per ARM/ARM64

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Message-ID: <8ddf54eb-6971-aed7-3067-f66393a40b44@linaro.org>
Date:   Sat, 11 Feb 2023 12:19:25 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] clk: qcom: restrict drivers per ARM/ARM64

On 10/02/2023 23:32, Stephen Boyd wrote:
>>
>> If DTSI (and/or board DTS) is in arm64, you still need DTS or a link in
>> arm directory. If such one is added, then the restrictions here can be
>> removed. Have in mind that I did the same already for pinctrl.
>>
> 
> I'm saying that you put the dts file in arch/arm64/boot/dts/, compile
> the dts to a dtb and stick it on a board that boots the kernel in arm32
> mode. If it is possible to boot the dtb on a CPU running in arm32 mode
> then this restriction should be loosened to 
> 
> 	depends on ARM || ARM64 || COMPILE_TEST

I get your point. I don't think we consider this as use case at all,
especially that we are changing some of the boards from address-cells=1
to 2. Also whatever is happening out-of-tree it's out-of-tree problem.
If we want to support such case, then the DTS would have to be in
arch/arm directory (like we do for few boards).

Best regards,
Krzysztof