Introduce support for Enclustra's Mercury+ AA1 SoM, based on Intel
Arria10. This is a flexible approach to allow for combining SoM
with carrier board .dtsi and boot-mode .dtsi in a device-tree file.

Signed-off-by: Andreas Buerkler <andreas.buerkler@enclustra.com>
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
---
 .../devicetree/bindings/arm/altera.yaml       |   3 +
 .../socfpga/socfpga_arria10_mercury_aa1.dtsi  | 141 +++++++++++++++---
 2 files changed, 123 insertions(+), 21 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/altera.yaml b/Documentation/devicetree/bindings/arm/altera.yaml
index 31af6859d..51f10ff8e 100644
--- a/Documentation/devicetree/bindings/arm/altera.yaml
+++ b/Documentation/devicetree/bindings/arm/altera.yaml
@@ -32,6 +32,9 @@ properties:
         items:
           - enum:
               - enclustra,mercury-pe1
+              - enclustra,mercury-aa1-pe1
+              - enclustra,mercury-aa1-pe3
+              - enclustra,mercury-aa1-st1
               - google,chameleon-v3
           - const: enclustra,mercury-aa1
           - const: altr,socfpga-arria10
diff --git a/arch/arm/boot/dts/intel/socfpga/socfpga_arria10_mercury_aa1.dtsi b/arch/arm/boot/dts/intel/socfpga/socfpga_arria10_mercury_aa1.dtsi
index 41f865c8c..cdd693cf9 100644
--- a/arch/arm/boot/dts/intel/socfpga/socfpga_arria10_mercury_aa1.dtsi
+++ b/arch/arm/boot/dts/intel/socfpga/socfpga_arria10_mercury_aa1.dtsi
@@ -7,12 +7,14 @@
 
 / {
 
-	model = "Enclustra Mercury AA1";
-	compatible = "enclustra,mercury-aa1", "altr,socfpga-arria10", "altr,socfpga";
+	model = "Enclustra Mercury+ AA1";
+	compatible = "enclustra,mercury-aa1",
+		     "altr,socfpga-arria10", "altr,socfpga";
 
 	aliases {
 		ethernet0 = &gmac0;
 		serial1 = &uart1;
+		spi0 = &qspi;
 	};
 
 	memory@0 {
@@ -24,52 +26,102 @@ memory@0 {
 	chosen {
 		stdout-path = "serial1:115200n8";
 	};
+
+	/* Adjusted the i2c labels to use generic base-board dtsi files for
+	 * Enclustra Arria10 and Cyclone5 SoMs.
+	 *
+	 * The set of i2c0 and i2c1 labels defined in socfpga_cyclone5.dtsi and in
+	 * socfpga_arria10.dtsi do not allow for using the same base-board .dtsi
+	 * fragments. Thus define generic labels here to match the correct i2c
+	 * bus in a generic base-board .dtsi file.
+	 */
+	soc {
+		i2c_encl: i2c@ffc02300 {
+		};
+		i2c_encl_fpga: i2c@ffc02200 {
+		};
+	};
+};
+
+&i2c_encl {
+	status = "okay";
+	i2c-sda-hold-time-ns = <300>;
+	clock-frequency = <100000>;
+
+	atsha204a: atsha204a@64 {
+		compatible = "atmel,atsha204a";
+		reg = <0x64>;
+	};
+
+	isl12022: isl12022@6f {
+		compatible = "isil,isl12022";
+		reg = <0x6f>;
+	};
+};
+
+&i2c_encl_fpga {
+	i2c-sda-hold-time-ns = <300>;
+	status = "disabled";
 };
 
 &gmac0 {
+	status = "okay";
 	phy-mode = "rgmii";
 	phy-addr = <0xffffffff>; /* probe for phy addr */
-
 	max-frame-size = <3800>;
-
 	phy-handle = <&phy3>;
 
+	/delete-property/ mac-address;
+
 	mdio {
 		#address-cells = <1>;
 		#size-cells = <0>;
 		compatible = "snps,dwmac-mdio";
 		phy3: ethernet-phy@3 {
-			txd0-skew-ps = <0>; /* -420ps */
-			txd1-skew-ps = <0>; /* -420ps */
-			txd2-skew-ps = <0>; /* -420ps */
-			txd3-skew-ps = <0>; /* -420ps */
+			reg = <3>;
+
+			/* Add 2ns RX clock delay (1.2ns + 0.78ns)*/
+			rxc-skew-ps = <1680>; /* 780ps */
 			rxd0-skew-ps = <420>; /* 0ps */
 			rxd1-skew-ps = <420>; /* 0ps */
 			rxd2-skew-ps = <420>; /* 0ps */
 			rxd3-skew-ps = <420>; /* 0ps */
-			txen-skew-ps = <0>; /* -420ps */
-			txc-skew-ps = <1860>; /* 960ps */
 			rxdv-skew-ps = <420>; /* 0ps */
-			rxc-skew-ps = <1680>; /* 780ps */
-			reg = <3>;
+
+			/* Add 1.38ns TX clock delay (0.96ns + 0.42ns)*/
+			txc-skew-ps = <1860>; /* 960ps */
+			txd0-skew-ps = <0>; /* -420ps */
+			txd1-skew-ps = <0>; /* -420ps */
+			txd2-skew-ps = <0>; /* -420ps */
+			txd3-skew-ps = <0>; /* -420ps */
+			txen-skew-ps = <0>; /* -420ps */
 		};
 	};
 };
 
-&i2c1 {
-	atsha204a: crypto@64 {
-		compatible = "atmel,atsha204a";
-		reg = <0x64>;
-	};
+&gpio0 {
+	status = "okay";
+};
 
-	isl12022: isl12022@6f {
-		compatible = "isil,isl12022";
-		reg = <0x6f>;
-	};
+&gpio1 {
+	status = "okay";
+};
+
+&gpio2 {
+	status = "okay";
+};
+
+&uart0 {
+	status = "disabled";
+};
+
+&uart1 {
+	status = "okay";
 };
 
 /* Following mappings are taken from arria10 socdk dts */
 &mmc {
+	status = "okay";
 	cap-sd-highspeed;
 	broken-cd;
 	bus-width = <4>;
@@ -79,3 +131,50 @@ &mmc {
 &osc1 {
 	clock-frequency = <33330000>;
 };
+
+&eccmgr {
+	sdmmca-ecc@ff8c2c00 {
+		compatible = "altr,socfpga-sdmmc-ecc";
+		reg = <0xff8c2c00 0x400>;
+		altr,ecc-parent = <&mmc>;
+		interrupts = <15 IRQ_TYPE_LEVEL_HIGH>,
+					 <47 IRQ_TYPE_LEVEL_HIGH>,
+					 <16 IRQ_TYPE_LEVEL_HIGH>,
+					 <48 IRQ_TYPE_LEVEL_HIGH>;
+	};
+};
+
+&qspi {
+	status = "okay";
+	flash0: s25fl512s@0 {
+		u-boot,dm-pre-reloc;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spansion,s25fl512s", "jedec,spi-nor";
+		reg = <0>;
+
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
+		spi-max-frequency = <10000000>;
+
+		cdns,read-delay = <4>;
+		cdns,tshsl-ns = <50>;
+		cdns,tsd2d-ns = <50>;
+		cdns,tchsh-ns = <4>;
+		cdns,tslch-ns = <4>;
+
+		partition@raw {
+			label = "Flash Raw";
+			reg = <0x0 0x4000000>;
+		};
+	};
+};
+
+&watchdog1 {
+	status = "disabled";
+};
+
+&usb0 {
+	status = "okay";
+	dr_mode = "host";
+};
-- 
2.25.1