DT dtc warnings

On Thu, Dec 14, 2017 at 10:13 PM, Fabio Estevam [off-list ref] wrote:

On Thu, Dec 14, 2017 at 7:01 PM, Krzysztof Kozlowski [off-list ref] wrote:

quoted

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