linux-kernel - [PATCH v3 2/3] dt-bindings: add document of Rockchip power domain

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Message-Id: <1413457353-4222-3-git-send-email-jinkun.hong@rock-chips.com>
Date:	Thu, 16 Oct 2014 04:02:32 -0700
From:	"jinkun.hong" <jinkun.hong@...k-chips.com>
To:	linus.walleij@...aro.org, linux-arm-kernel@...ts.infradead.org
Cc:	Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Randy Dunlap <rdunlap@...radead.org>,
	linux-doc@...r.kernel.org, dianders@...omium.org,
	Heiko Stuebner <heiko@...ech.de>,
	linux-rockchip@...ts.infradead.org,
	Ulf Hansson <ulf.hansson@...aro.org>,
	"jinkun.hong" <jinkun.hong@...k-chips.com>,
	Jack Dai <jack.dai@...k-chips.com>
Subject: [PATCH v3 2/3] dt-bindings: add document of Rockchip power domain

From: "jinkun.hong" <jinkun.hong@...k-chips.com>

Signed-off-by: Jack Dai <jack.dai@...k-chips.com>
Signed-off-by: jinkun.hong <jinkun.hong@...k-chips.com>

---

Changes in v3:
- DT structure has changed

Changes in v2:
- move clocks to "optional"

 .../bindings/arm/rockchip/power_domain.txt         |   46 ++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/rockchip/power_domain.txt

diff --git a/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt b/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt
new file mode 100644
index 0000000..f8357b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/rockchip/power_domain.txt
@@ -0,0 +1,46 @@
+* Rockchip Power Domains
+
+Rockchip processors include support for multiple power domains which can be
+powered up/down by software based on different application scenes to save power.
+
+Required properties for power domain controller:
+- compatible: should be one of the following.
+    * rockchip,rk3288-power-gpu - for rk3288 type gpu power domain.
+    * rockchip,rk3288-power-hevc - for rk3288 type hevc power domain.
+    * rockchip,rk3288-power-video - for rk3288 type video power domain.
+    * rockchip,rk3288-power-vio - for rk3288 type vio power domain.
+- rockchip,pmu: phandle referencing a syscon providing the pmu registers
+- #power-domain-cells: Number of cells in a power-domain specifier.
+		       should be 0.
+
+Example:
+
+	gpu_power: gpu-power-controller {
+		compatible = "rockchip,rk3288-power-gpu";
+		rockchip,pmu = <&pmu>;
+		#power-domain-cells = <0>;
+	};
+
+	hevc_power: hevc-power-controller {
+		compatible = "rockchip,rk3288-power-hevc";
+		rockchip,pmu = <&pmu>;
+		#power-domain-cells = <0>;
+	};
+
+	video_power: video-power-controller {
+		compatible = "rockchip,rk3288-power-video";
+		rockchip,pmu = <&pmu>;
+		#power-domain-cells = <0>;
+	};
+
+	vio_power: vio-power-controller {
+		compatible = "rockchip,rk3288-power-vio";
+		rockchip,pmu = <&pmu>;
+		#power-domain-cells = <0>;
+	};
+
+	gpu: gpu@...fa30000 {
+		...
+		power-domains = <&gpu_power>;
+		...
+	};
-- 
1.7.9.5

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