linux-kernel - Re: [PATCH v2] ARM: dts: exynos: Fix missing empty reg/ranges property regulators on Trats

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Date:   Thu, 2 Jul 2020 09:48:26 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Sylwester Nawrocki <snawrocki@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kukjin Kim <kgene@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: Re: [PATCH v2] ARM: dts: exynos: Fix missing empty reg/ranges
 property regulators on Trats

On 02.07.2020 09:39, Krzysztof Kozlowski wrote:
> On Thu, Jul 02, 2020 at 08:16:11AM +0200, Krzysztof Kozlowski wrote:
>> On Tue, Jun 30, 2020 at 08:27:01AM +0200, Marek Szyprowski wrote:
>>> On 29.06.2020 22:59, Krzysztof Kozlowski wrote:
>>>> Remove the regulators node entirely because its children do not have any
>>>> unit addresses.  This fixes DTC warning:
>>>>
>>>>       Warning (simple_bus_reg): /regulators/regulator-0: missing or empty reg/ranges property
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
>>> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
>>>
>>> What about removing the regulators node from other boards:
>>> exynos4412-origen.dts, exynos5420-smdk5420.dts and exynos5250-arndale.dts?
>>>
>>> On the other hand, maybe it would be really easier to add missing
>>> address/size-cells properties to exynos4210-trats.dts/regulators node?
>> Indeed let's keep it consistent so in such case better to add here
>> proper address/size-cells.
> Actually more of DTSes put fixed regulators directly in root node, not
> under "regulators" node:
> exynos3250-monk.dts
> exynos4210-i9100.dts
> exynos4210-origen.dts
> exynos4210-universal_c210.dts
> exynos4412-galaxy-s3.dtsi
> exynos4412-midas.dtsi
> exynos4412-n710x.dts
> exynos4412-odroidx.dts
> exynos5250-smdk5250.dts
> exynos5250-snow-common.dtsi
> exynos5420-peach-pit.dts
> exynos5800-peach-pi.dts
>
> If we want it to be consistent, it's easier to remove the regulator
> nodes from exynos4412-origen.dts, exynos5420-smdk5420.dts and
> exynos5250-arndale.dts.

Feel free, I'm fine with both approaches.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland