linux-kernel - [PATCH 2/6] dt-bindings: power: pd-samsung: Allow pd nodes to be children of PMU

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Date:   Wed,  8 Mar 2023 17:09:27 -0600
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Chanho Park <chanho61.park@...sung.com>,
        David Virag <virag.david003@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] dt-bindings: power: pd-samsung: Allow pd nodes to be children of PMU

Introduce a new "samsung,pd-index" property to choose a specific power
domain. This way it would be possible to avoid specifying any addresses
in power domain nodes, relying solely on syscon regmap from the parent
node (which should be a PMU system controller). Therefore the "reg"
property is deprecated now, as it's more logical to describe power
domains as children of PMU node, because PD registers reside in the PMU
area.

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
 .../devicetree/bindings/power/pd-samsung.yaml         | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/power/pd-samsung.yaml b/Documentation/devicetree/bindings/power/pd-samsung.yaml
index a353a705292c..73178b1a56ea 100644
--- a/Documentation/devicetree/bindings/power/pd-samsung.yaml
+++ b/Documentation/devicetree/bindings/power/pd-samsung.yaml
@@ -25,6 +25,10 @@ properties:
 
   reg:
     maxItems: 1
+    deprecated: true
+    description:
+      Physical base address and length of Power Domains area (if not a child of
+      PMU).
 
   clocks:
     deprecated: true
@@ -45,10 +49,15 @@ properties:
   power-domains:
     maxItems: 1
 
+  samsung,pd-index:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Power domain index (if a child of PMU). Valid values are defined in::
+        "include/dt-bindings/power/samsung,exynos850-power.h" - for Exynos850
+
 required:
   - compatible
   - "#power-domain-cells"
-  - reg
 
 unevaluatedProperties: false
 
-- 
2.39.2