linux-kernel - [PATCH v1 2/6] dt-bindings: drm/msm/a6xx: Add GX power-domain for GMU bindings

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Date:   Mon,  4 Feb 2019 09:15:40 -0700
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Rob Herring <robh+dt@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: [PATCH v1 2/6] dt-bindings: drm/msm/a6xx: Add GX power-domain for GMU bindings

The GMU should have two power domains defined: "cx" and "gx". "cx" is the
actual power domain for the device and "gx" will be attached at runtime
to manage reference counting on the GPU device in case of a GMU crash.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
---

 Documentation/devicetree/bindings/display/msm/gmu.txt | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/gmu.txt b/Documentation/devicetree/bindings/display/msm/gmu.txt
index 3439b38..90af5b0 100644
--- a/Documentation/devicetree/bindings/display/msm/gmu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gmu.txt
@@ -24,7 +24,10 @@ Required properties:
    * "cxo"
    * "axi"
    * "mnoc"
-- power-domains: should be <&clock_gpucc GPU_CX_GDSC>
+- power-domains: should be:
+	<&clock_gpucc GPU_CX_GDSC>
+	<&clock_gpucc GPU_GX_GDSC>
+- power-domain-names: Matching names for the power domains
 - iommus: phandle to the adreno iommu
 - operating-points-v2: phandle to the OPP operating points
 
@@ -51,7 +54,10 @@ Example:
 			<&gcc GCC_GPU_MEMNOC_GFX_CLK>;
 		clock-names = "gmu", "cxo", "axi", "memnoc";
 
-		power-domains = <&gpucc GPU_CX_GDSC>;
+		power-domains = <&gpucc GPU_CX_GDSC>,
+				<&gpucc GPU_GX_GDSC>;
+		power-domain-names = "cx", "gx";
+
 		iommus = <&adreno_smmu 5>;
 
 		operating-points-v2 = <&gmu_opp_table>;
-- 
2.7.4