[PATCH v8 02/10] dt-bindings: power: samsung: add google,gs101-pd

André Draszik
2026-03-18T15:28:01Z

Add support for the Google gs101 version of the Exynos power domains. A
new compatible is needed because register fields have changed and
because power domain operations involve interfacing with the TrustZone
protection control on newer Exynos SoCs.

Power domains can also have a power supply linked to them, so add
optional support for that, too. It is believed that all (existing)
platforms could benefit from this, hence it's not being limited to
gs101-pd.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>

---
v5:
- add domain-supply and update commit message

v4:
- add new vendor property samsung,dtzpc
- drop previous tags due to that
---
.../devicetree/bindings/power/pd-samsung.yaml | 33 ++++++++++++++++++++--
1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/pd-samsung.yaml b/Documentation/devicetree/bindings/power/pd-samsung.yaml
index 9c2c51133457..3f1a2dc17862 100644
--- a/Documentation/devicetree/bindings/power/pd-samsung.yaml
+++ b/Documentation/devicetree/bindings/power/pd-samsung.yaml
@@ -13,12 +13,10 @@ description: |+
Exynos processors include support for multiple power domains which are used
to gate power to one or more peripherals on the processor.

-allOf:
- - $ref: power-domain.yaml#
-
properties:
compatible:
enum:
+ - google,gs101-pd
- samsung,exynos4210-pd
- samsung,exynos5433-pd

@@ -33,6 +31,9 @@ properties:
deprecated: true
maxItems: 1

+ domain-supply:
+ description: domain regulator supply.
+
label:
description:
Human readable string with domain name. Will be visible in userspace
@@ -44,11 +45,28 @@ properties:
power-domains:
maxItems: 1

+ samsung,dtzpc:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Distributed TrustZone Protection Control (DTZPC) node.
+
required:
- compatible
- "#power-domain-cells"
- reg

+allOf:
+ - $ref: power-domain.yaml#
+ - if:
+ not:
+ properties:
+ compatible:
+ contains:
+ const: google,gs101-pd
+ then:
+ properties:
+ samsung,dtzpc: false
+
unevaluatedProperties: false

examples:
@@ -66,3 +84,12 @@ examples:
#power-domain-cells = <0>;
label = "MFC";
};
+
+ power-domain@2080 {
+ compatible = "google,gs101-pd";
+ reg = <0x2080 0x80>;
+ #power-domain-cells = <0>;
+ label = "hsi0";
+ domain-supply = <&ldo7m>;
+ samsung,dtzpc = <&dtzpc_hsi0>;
+ };

--
2.53.0.851.ga537e3e6e9-goog