Hi,

On Wed, 2020-01-22 at 18:54 +0200, Georgi Djakov wrote:

Hi Artur,

Thank you for your continuous work on this.

On 12/20/19 13:56, Artur Świgoń wrote:

quoted

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;

Is this DT property documented somewhere? I believe that there should be a patch
to document it somewhere in Documentation/devicetree/bindings/ before using it.

It will be documented in Documentation/devicetree/bindings/devfreq/exynos-bus.txt
in the next version.

quoted

  - #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@samsung.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";
 };

-- 
Artur Świgoń
Samsung R&D Institute Poland
Samsung Electronics



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