DT dtc warnings

[Krzysztof Kozlowski]

On Thu, Dec 14, 2017 at 10:13 PM, Fabio Estevam <festevam at gmail.com> wrote:
> On Thu, Dec 14, 2017 at 7:01 PM, Krzysztof Kozlowski <krzk at kernel.org> wrote:
>
>> Can anyone help why this W=1 triggers warning like these:
>> arch/arm/boot/dts/exynos3250-artik5-eval.dtb: Warning
>> (simple_bus_reg): Node /soc/syscon-poweroff missing or empty
>> reg/ranges property
>> arch/arm/boot/dts/exynos3250-artik5-eval.dtb: Warning
>> (simple_bus_reg): Node /soc/syscon-reboot missing or empty reg/ranges
>> property
>>
>> For a node without unit address?
>> http://elixir.free-electrons.com/linux/v4.15-rc3/source/arch/arm/boot/dts/exynos-syscon-restart.dtsi
>>
>> AFAIR, if node does not have unit-address then it should not have
>> reg/ranges property. Or maybe it is coming from parent's simple-bus?
>
> syscon-poweroff and syscon-reboot should be outside the soc bus.

Thanks for reply!

Isn't this property of a SoC? The registers used by
syscon-poweroff/reboot are part of SoC power management unit. It does
not refer to any externals. Why then it should be put outside of soc?

Best regards,
Krzysztof