On Wed, 27 Oct 2021 at 16:44, Rob Herring [off-list ref] wrote:

On Tue, Oct 26, 2021 at 10:38 PM Hector Martin [off-list ref] wrote:

quoted

On 27/10/2021 03.25, Rob Herring wrote:

quoted

On Mon, Oct 25, 2021 at 11:47:12PM +0900, Hector Martin wrote:

quoted

+  compatible:
+    items:
+      - enum:
+          - apple,t8103-pmgr
+          - apple,t8103-minipmgr
+      - const: apple,pmgr
+      - const: syscon
+      - const: simple-mfd

'simple-mfd' means 'there's nothing in this node that any of the child
nodes depend on'. You should be somewhat certain as dropping it later
creates compatibility issues.

Hmm, I see simple-mfd turns this into a bus which I guess allows child
nodes to be probed without the parent node doing anything special (then
we use syscon_node_to_regmap to get the syscon instantiated). Do you
have a example use case for doing this without simple-mfd?

Drivers calling of_platform_populate or devm_of_platform_populate.

That of course does mean you need a driver. We could probably make the
syscon driver call these if needed.

Hi Hector,

I thought I mentioned this with your v1, maybe the comment got lost.
We have it for Exynos PMU:
drivers/soc/samsung/exynos-pmu.c
arch/arm/boot/dts/exynos-syscon-restart.dtsi (extending node from
arch/arm/boot/dts/exynos5420.dtsi)
Maybe you can base on that.

Best regards,
Krzysztof