linux-kernel - [PATCH v6 4/6] ARM: rockchip: add sram dt nodes and documentation

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Message-ID: <2305896.xt7Ek2gLER@phil>
Date:	Wed, 15 Jan 2014 22:42:35 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Cc:	arm@...nel.org, Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robherring2@...il.com>,
	devicetree@...r.kernel.org, Philipp Zabel <p.zabel@...gutronix.de>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>
Subject: [PATCH v6 4/6] ARM: rockchip: add sram dt nodes and documentation

Add dt-nodes for the sram on rk3066 and rk3188 including the reserved section
needed for smp bringup.

Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Tested-by: Ulrich Prinz <ulrich.prinz@...glemail.com>
---
 .../devicetree/bindings/arm/rockchip/smp-sram.txt  |   23 ++++++++++++++++++++
 arch/arm/boot/dts/rk3066a.dtsi                     |    6 +++++
 arch/arm/boot/dts/rk3188.dtsi                      |    6 +++++
 3 files changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt

diff --git a/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt
new file mode 100644
index 0000000..80c878e
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt
@@ -0,0 +1,23 @@
+Rockchip SRAM for smp bringup:
+------------------------------
+
+Rockchip's smp-capable SoCs use the first part of the sram for the bringup
+of the cores. Once the core gets powered up it executes the code that is
+residing at the very beginning of the sram.
+
+Therefore a reserved section has to be added to the mmio-sram declaration.
+
+Required node properties:
+- compatible : should contain both "rockchip,rk3066-sram", "mmio-sram"
+  so that the smp code can select the correct sram node.
+
+The rest of the properties should follow the generic mmio-sram discription
+found in ../../misc/sram.txt
+
+Example:
+
+	sram: sram@...80000 {
+		compatible = "rockchip,rk3066-sram", "mmio-sram";
+		reg = <0x10080000 0x10000>;
+		mmio-sram-reserved = <0x0 0x50>;
+	};
diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi
index be5d2b0..0dfb680 100644
--- a/arch/arm/boot/dts/rk3066a.dtsi
+++ b/arch/arm/boot/dts/rk3066a.dtsi
@@ -64,6 +64,12 @@
 			clock-names = "timer", "pclk";
 		};
 
+		sram: sram@...80000 {
+			compatible = "rockchip,rk3066-sram", "mmio-sram";
+			reg = <0x10080000 0x10000>;
+			mmio-sram-reserved = <0x0 0x50>;
+		};
+
 		pinctrl@...08000 {
 			compatible = "rockchip,rk3066a-pinctrl";
 			reg = <0x20008000 0x150>;
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index 1a26b03..1fc7eda 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -60,6 +60,12 @@
 			interrupts = <GIC_PPI 13 0xf04>;
 		};
 
+		sram: sram@...80000 {
+			compatible = "rockchip,rk3066-sram", "mmio-sram";
+			reg = <0x10080000 0x8000>;
+			mmio-sram-reserved = <0x0 0x50>;
+		};
+
 		pinctrl@...08000 {
 			compatible = "rockchip,rk3188-pinctrl";
 			reg = <0x20008000 0xa0>,
-- 
1.7.10.4


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