arm: socfpga: dts: Add Arria10 SDRAM EDAC DTS support

Add support for the Arria10 SDRAM EDAC. Update the bindings document for
the new match string.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: devicetree@vger.kernel.org
Cc: dinguyen@opensource.altera.com
Cc: galak@codeaurora.org
Cc: grant.likely@linaro.org
Cc: ijc+devicetree@hellion.org.uk
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: m.chehab@samsung.com
Cc: mark.rutland@arm.com
Cc: pawel.moll@arm.com
Cc: robh+dt@kernel.org
Cc: tthayer.linux@gmail.com
Link: http://lkml.kernel.org/r/1433428128-7292-5-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>

Documentation/devicetree/bindings/arm/altera/socfpga-sdram-edac.txt

@@ -2,7 +2,7 @@ Altera SOCFPGA SDRAM Error Detection & Correction [EDAC]
 The EDAC accesses a range of registers in the SDRAM controller.
 
 Required properties:
-- compatible : should contain "altr,sdram-edac";
+- compatible : should contain "altr,sdram-edac" or "altr,sdram-edac-a10"
 - altr,sdr-syscon : phandle of the sdr module
 - interrupts : Should contain the SDRAM ECC IRQ in the
 	appropriate format for the IRQ controller.

arch/arm/boot/dts/socfpga_arria10.dtsi

@@ -253,6 +253,17 @@
 			status = "disabled";
 		};
 
+		sdr: sdr@ffc25000 {
+			compatible = "syscon";
+			reg = <0xffcfb100 0x80>;
+		};
+
+		sdramedac {
+			compatible = "altr,sdram-edac-a10";
+			altr,sdr-syscon = <&sdr>;
+			interrupts = <0 2 4>, <0 0 4>;
+		};
+
 		L2: l2-cache@fffff000 {
 			compatible = "arm,pl310-cache";
 			reg = <0xfffff000 0x1000>;