arm64: dts: ti: k3-am64-main: Add ELM (Error Location Module) node

The ELM module is used for GPMC NAND accesses for detecting
and correcting errors during reads due to NAND bitflips errors.

4-, 8-, and 16-bit error-correction levels are supported using
the BCH (Bose-ChaudhurI-Hocquenghem) algorithm.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20220802104456.11069-3-rogerq@kernel.org

arch/arm64/boot/dts/ti/k3-am64-main.dtsi

@@ -1347,4 +1347,13 @@
 		gpio-controller;
 		#gpio-cells = <2>;
 	};
+
+	elm0: ecc@25010000 {
+		compatible = "ti,am64-elm";
+		reg = <0x00 0x25010000 0x00 0x2000>;
+		interrupts = <GIC_SPI 132 IRQ_TYPE_LEVEL_HIGH>;
+		power-domains = <&k3_pds 54 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 54 0>;
+		clock-names = "fck";
+	};
 };

arch/arm64/boot/dts/ti/k3-am642-evm.dts

@@ -680,3 +680,7 @@
 &gpmc0 {
 	status = "disabled";
 };
+
+&elm0 {
+	status = "disabled";
+};

arch/arm64/boot/dts/ti/k3-am642-sk.dts

@@ -611,3 +611,7 @@
 &gpmc0 {
 	status = "disabled";
 };
+
+&elm0 {
+	status = "disabled";
+};