linux-kernel - [PATCH RFC 5/5] ARM: mvebu: Update Armada 38x DT for dynamic frequency scaling

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Date:	Fri,  3 Jul 2015 08:11:57 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Mike Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>
Subject: [PATCH RFC 5/5] ARM: mvebu: Update Armada 38x DT for dynamic frequency scaling

In order to support dynamic frequency scaling:

- the cpuclk Device Tree node must be added

- the clock property of the CPUs must be filled including the
  clock-latency property.

Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
---
 arch/arm/boot/dts/armada-380.dtsi | 3 +++
 arch/arm/boot/dts/armada-385.dtsi | 6 ++++++
 arch/arm/boot/dts/armada-38x.dtsi | 9 +++++++++
 3 files changed, 18 insertions(+)

diff --git a/arch/arm/boot/dts/armada-380.dtsi b/arch/arm/boot/dts/armada-380.dtsi
index 5102d19cc8f4..f9dbc75bea73 100644
--- a/arch/arm/boot/dts/armada-380.dtsi
+++ b/arch/arm/boot/dts/armada-380.dtsi
@@ -61,6 +61,9 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <0>;
+			clocks = <&cpuclk 0>;
+			clock-latency = <1000000>;
+			clock-names = "cpu0";
 		};
 	};
 
diff --git a/arch/arm/boot/dts/armada-385.dtsi b/arch/arm/boot/dts/armada-385.dtsi
index 8e67d2c083dd..62660dd377be 100644
--- a/arch/arm/boot/dts/armada-385.dtsi
+++ b/arch/arm/boot/dts/armada-385.dtsi
@@ -61,11 +61,17 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <0>;
+			clocks = <&cpuclk 0>;
+			clock-latency = <1000000>;
+			clock-names = "cpu0";
 		};
 		cpu@1 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <1>;
+			clocks = <&cpuclk 0>;
+			clock-latency = <1000000>;
+			clock-names = "cpu1";
 		};
 	};
 
diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
index 04ecfe6e2bc6..08409e92f3f3 100644
--- a/arch/arm/boot/dts/armada-38x.dtsi
+++ b/arch/arm/boot/dts/armada-38x.dtsi
@@ -369,6 +369,15 @@
 				#clock-cells = <1>;
 			};
 
+			cpuclk: clock-complex@...00 {
+				compatible = "marvell,armada-380-cpu-clock",
+				"marvell,armada-xp-cpu-clock";
+				reg = <0x18700 0xA0>, <0x1c054 0x40>,
+				<0xe4260 0x8>;
+				clocks = <&coreclk 1>;
+				#clock-cells = <1>;
+			};
+
 			mbusc: mbus-controller@...00 {
 				compatible = "marvell,mbus-controller";
 				reg = <0x20000 0x100>, <0x20180 0x20>;
-- 
2.1.0

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