linux-kernel - [PATCHv6 5/5] arm: dts: Add Altera L2 Cache and OCRAM EDAC entries

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Message-ID: <1420772036-3112-6-git-send-email-tthayer@opensource.altera.com>
Date:	Thu, 8 Jan 2015 20:53:56 -0600
From:	<tthayer@...nsource.altera.com>
To:	<bp@...en8.de>, <dougthompson@...ssion.com>,
	<m.chehab@...sung.com>, <robh+dt@...nel.org>, <pawel.moll@....com>,
	<mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>,
	<galak@...eaurora.org>, <linux@....linux.org.uk>,
	<dinguyen@...nsource.altera.com>, <grant.likely@...aro.org>
CC:	<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <tthayer.linux@...il.com>,
	<tthayer@...nsource.altera.com>
Subject: [PATCHv6 5/5] arm: dts: Add Altera L2 Cache and OCRAM EDAC entries

From: Thor Thayer <tthayer@...nsource.altera.com>

Adding the device tree entries and bindings needed to support
the Altera L2 cache and On-Chip RAM EDAC. This patch relies upon
an earlier patch to declare and setup On-chip RAM properly.
http://www.spinics.net/lists/devicetree/msg51117.html

Signed-off-by: Thor Thayer <tthayer@...nsource.altera.com>
---
v2: Remove OCRAM declaration and reference prior patch.

v3-5: No Change

v6: Change to nested EDAC device nodes based on community
    feedback. Remove L2 syscon. Use consolidated binding.
---
 .../bindings/arm/altera/socfpga-edac.txt           |   46 ++++++++++++++++++++
 arch/arm/boot/dts/socfpga.dtsi                     |   20 +++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/altera/socfpga-edac.txt

diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-edac.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-edac.txt
new file mode 100644
index 0000000..4bf32e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/altera/socfpga-edac.txt
@@ -0,0 +1,46 @@
+Altera SoCFPGA Error Detection and Correction [EDAC]
+
+Required Properties:
+- compatible : Should be "altr,edac"
+- #address-cells: must be 1
+- #size-cells: must be 1
+- ranges : standard definition, should translate from local addresses
+
+Subcomponents:
+
+L2 Cache ECC
+Required Properties:
+- compatible : Should be "altr,l2-edac"
+- reg : Address and size for ECC error interrupt clear registers.
+- interrupts : Should be single bit error interrupt, then double bit error
+	interrupt. Note the rising edge type.
+
+On Chip RAM ECC
+Required Properties:
+- compatible : Should be "altr,ocram-edac"
+- reg : Address and size for ECC error interrupt clear registers.
+- iram : phandle to On-Chip RAM definition.
+- interrupts : Should be single bit error interrupt, then double bit error
+	interrupt. Note the rising edge type.
+
+Example:
+
+	soc_ecc {
+		compatible = "altr,edac";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		l2edac@...08140 {
+			compatible = "altr,l2-edac";
+			reg = <0xffd08140 0x4>;
+			interrupts = <0 36 1>, <0 37 1>;
+		};
+
+		ocramedac@...08144 {
+			compatible = "altr,ocram-edac";
+			reg = <0xffd08144 0x4>;
+			iram = <&ocram>;
+			interrupts = <0 178 1>, <0 179 1>;
+		};
+	};
diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
index 252c3d1..e546e47 100644
--- a/arch/arm/boot/dts/socfpga.dtsi
+++ b/arch/arm/boot/dts/socfpga.dtsi
@@ -618,6 +618,26 @@
 			interrupts = <0 39 4>;
 		};
 
+		soc_ecc {
+			compatible = "altr,edac";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+
+			l2edac@...08140 {
+				compatible = "altr,l2-edac";
+				reg = <0xffd08140 0x4>;
+				interrupts = <0 36 1>, <0 37 1>;
+			};
+
+			ocramedac@...08144 {
+				compatible = "altr,ocram-edac";
+				reg = <0xffd08144 0x4>;
+				iram = <&ocram>;
+				interrupts = <0 178 1>, <0 179 1>;
+			};
+		};
+
 		L2: l2-cache@...ef000 {
 			compatible = "arm,pl310-cache";
 			reg = <0xfffef000 0x1000>;
-- 
1.7.9.5

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