linux-kernel - [RFC PATCH v3 4/7] arm: dts: exynos: Add interconnect bindings for Exynos4412

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Message-Id: <20191220115653.6487-5-a.swigon@samsung.com>
Date:   Fri, 20 Dec 2019 12:56:50 +0100
From:   Artur Świgoń <a.swigon@...sung.com>
To:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc:     Artur Świgoń <a.swigon@...sung.com>,
        cw00.choi@...sung.com, myungjoo.ham@...sung.com,
        inki.dae@...sung.com, sw0312.kim@...sung.com,
        georgi.djakov@...aro.org, leonard.crestez@....com,
        m.szyprowski@...sung.com, b.zolnierkie@...sung.com, krzk@...nel.org
Subject: [RFC PATCH v3 4/7] arm: dts: exynos: Add interconnect bindings for
 Exynos4412

This patch adds the following properties to the Exynos4412 DT:
  - exynos,interconnect-parent-node: to declare connections between
    nodes in order to guarantee PM QoS requirements between nodes;
  - #interconnect-cells: required by the interconnect framework.

Note that #interconnect-cells is always zero and node IDs are not
hardcoded anywhere.

Signed-off-by: Artur Świgoń <a.swigon@...sung.com>
---
 arch/arm/boot/dts/exynos4412-odroid-common.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
index 4ce3d77a6704..d9d70eacfcaf 100644
--- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
+++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
@@ -90,6 +90,7 @@
 &bus_dmc {
 	exynos,ppmu-device = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>;
 	vdd-supply = <&buck1_reg>;
+	#interconnect-cells = <0>;
 	status = "okay";
 };
 
@@ -106,6 +107,8 @@
 &bus_leftbus {
 	exynos,ppmu-device = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>;
 	vdd-supply = <&buck3_reg>;
+	exynos,interconnect-parent-node = <&bus_dmc>;
+	#interconnect-cells = <0>;
 	status = "okay";
 };
 
@@ -116,6 +119,8 @@
 
 &bus_display {
 	exynos,parent-bus = <&bus_leftbus>;
+	exynos,interconnect-parent-node = <&bus_leftbus>;
+	#interconnect-cells = <0>;
 	status = "okay";
 };
 
-- 
2.17.1