arm: zynq: Add Nand flash mini u-boot configuration for zynq

Add configuration files/dtses for mini u-boot configuration
which runs on smaller footprint of memory. This configuration
has only required nand flash support.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/Makefile

@@ -129,6 +129,7 @@ dtb-$(CONFIG_ARCH_UNIPHIER_SLD8) += \
 
 dtb-$(CONFIG_ARCH_ZYNQ) += \
 	zynq-cc108.dtb \
+	zynq-cse-nand.dtb \
 	zynq-cse-qspi-single.dtb \
 	zynq-microzed.dtb \
 	zynq-minized.dtb \

arch/arm/dts/zynq-cse-nand.dts

@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Xilinx CSE NAND board DTS
+ *
+ * Copyright (C) 2018 Xilinx, Inc.
+ */
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	model = "Zynq CSE NAND Board";
+	compatible = "xlnx,zynq-cse-nand", "xlnx,zynq-7000";
+
+	aliases {
+		serial0 = &dcc;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x400000>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	dcc: dcc {
+		compatible = "arm,dcc";
+		status = "disabled";
+		u-boot,dm-pre-reloc;
+	};
+
+	amba: amba {
+		u-boot,dm-pre-reloc;
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+			slcr: slcr@f8000000 {
+			u-boot,dm-pre-reloc;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "xlnx,zynq-slcr", "syscon", "simple-bus";
+			reg = <0xF8000000 0x1000>;
+			ranges;
+			clkc: clkc@100 {
+				u-boot,dm-pre-reloc;
+				#clock-cells = <1>;
+				compatible = "xlnx,ps7-clkc";
+				clock-output-names = "armpll", "ddrpll",
+						"iopll", "cpu_6or4x",
+						"cpu_3or2x", "cpu_2x", "cpu_1x",
+						"ddr2x", "ddr3x", "dci",
+						"lqspi", "smc", "pcap", "gem0",
+						"gem1", "fclk0", "fclk1",
+						"fclk2", "fclk3", "can0",
+						"can1", "sdio0", "sdio1",
+						"uart0", "uart1", "spi0",
+						"spi1", "dma", "usb0_aper",
+						"usb1_aper", "gem0_aper",
+						"gem1_aper", "sdio0_aper",
+						"sdio1_aper", "spi0_aper",
+						"spi1_aper", "can0_aper",
+						"can1_aper", "i2c0_aper",
+						"i2c1_aper", "uart0_aper",
+						"uart1_aper", "gpio_aper",
+						"lqspi_aper", "smc_aper",
+						"swdt", "dbg_trc", "dbg_apb";
+				reg = <0x100 0x100>;
+			};
+		};
+	};
+
+};
+
+&dcc {
+	status = "okay";
+};

configs/zynq_cse_nand_defconfig

@@ -0,0 +1,47 @@
+CONFIG_ARM=y
+CONFIG_SYS_CONFIG_NAME="zynq_cse"
+CONFIG_ARCH_ZYNQ=y
+CONFIG_SYS_TEXT_BASE=0x100000
+CONFIG_SPL=y
+CONFIG_SPL_STACK_R_ADDR=0x200000
+CONFIG_DEFAULT_DEVICE_TREE="zynq-cse-nand"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_SPL_STACK_R=y
+CONFIG_SYS_PROMPT="Zynq> "
+# CONFIG_CMD_BDI is not set
+# CONFIG_CMD_CONSOLE is not set
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_BOOTM is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_FDT is not set
+# CONFIG_CMD_GO is not set
+# CONFIG_CMD_RUN is not set
+# CONFIG_CMD_IMI is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_SPL is not set
+# CONFIG_CMD_EXPORTENV is not set
+# CONFIG_CMD_IMPORTENV is not set
+# CONFIG_CMD_EDITENV is not set
+# CONFIG_CMD_SAVEENV is not set
+# CONFIG_CMD_ENV_EXISTS is not set
+# CONFIG_CMD_CRC32 is not set
+# CONFIG_CMD_CLK is not set
+# CONFIG_CMD_DM is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADB is not set
+# CONFIG_CMD_LOADS is not set
+# CONFIG_CMD_ECHO is not set
+# CONFIG_CMD_ITEST is not set
+# CONFIG_CMD_SOURCE is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_MISC is not set
+# CONFIG_PARTITIONS is not set
+CONFIG_OF_EMBED=y
+# CONFIG_DM_WARN is not set
+# CONFIG_DM_DEVICE_REMOVE is not set
+CONFIG_SPL_DM_SEQ_ALIAS=y
+# CONFIG_MMC is not set
+CONFIG_NAND=y
+CONFIG_NAND_ZYNQ=y
+# CONFIG_EFI_LOADER is not set