linux-kernel - [PATCH v6 6/8] dt-bindings: power: rockchip: add regulator support

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Message-Id: <20250220-rk3588-gpu-pwr-domain-regulator-v6-6-a4f9c24e5b81@kernel.org>
Date: Thu, 20 Feb 2025 19:58:09 +0100
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Mark Brown <broonie@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>, 
 Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, 
 Elaine Zhang <zhangqing@...k-chips.com>, 
 Adrián Martínez Larumbe <adrian.larumbe@...labora.com>, 
 Boris Brezillon <boris.brezillon@...labora.com>, 
 Peter Geis <pgwipeout@...il.com>, Tomeu Vizoso <tomeu@...euvizoso.net>, 
 Vignesh Raman <vignesh.raman@...labora.com>, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
 devicetree@...r.kernel.org, 
 Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH v6 6/8] dt-bindings: power: rockchip: add regulator support

Add optional support for a voltage supply required to enable a
power domain. The binding follows the way it is handled by the
Mediatek binding to keep things consistent.

This will initially be used by the RK3588 GPU power domain, which
fails to be enabled when the GPU regulator is not enabled. It is
not limited to that platform, since older generations have similar
requirements. They worked around this by marking the regulators
as always-on instead of describing the dependency.

Reviewed-by: Heiko Stuebner <heiko@...ech.de>
Tested-by: Heiko Stuebner <heiko@...ech.de>
Acked-by: Rob Herring (Arm) <robh@...nel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 Documentation/devicetree/bindings/power/rockchip,power-controller.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/rockchip,power-controller.yaml b/Documentation/devicetree/bindings/power/rockchip,power-controller.yaml
index 650dc0aae6f518578f57e8ec4335bc8251b736a7..ebab98987e492d64fff9977848fd8942ed96c4b9 100644
--- a/Documentation/devicetree/bindings/power/rockchip,power-controller.yaml
+++ b/Documentation/devicetree/bindings/power/rockchip,power-controller.yaml
@@ -132,6 +132,9 @@ $defs:
           A number of phandles to clocks that need to be enabled
           while power domain switches state.
 
+      domain-supply:
+        description: domain regulator supply.
+
       pm_qos:
         $ref: /schemas/types.yaml#/definitions/phandle-array
         items:

-- 
2.47.2