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

Add configuration files/dtses for mini u-boot configurations which runs
out of OCM.

ram top is calculated from 0 that's why +#define CONFIG_SYS_SDRAM_BASE
0xfffc0000
+#define CONFIG_SYS_SDRAM_SIZE  0x40000
was hardcoded.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/Makefile

@@ -126,6 +126,7 @@ dtb-$(CONFIG_ARCH_UNIPHIER_SLD8) += \
 
 dtb-$(CONFIG_ARCH_ZYNQ) += \
 	zynq-cc108.dtb \
+	zynq-cse-qspi-single.dtb \
 	zynq-microzed.dtb \
 	zynq-picozed.dtb \
 	zynq-syzygy-hub.dtb \

arch/arm/dts/zynq-cse-qspi-single.dts

+/*
+ * Xilinx CSE QSPI single DTS
+ *
+ * Copyright (C) 2015 - 2017 Xilinx, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include "zynq-cse-qspi.dtsi"
+
+&qspi {
+	spi-rx-bus-width = <4>;
+};

arch/arm/dts/zynq-cse-qspi.dtsi

+/*
+ * Xilinx CSE QSPI board DTS
+ *
+ * Copyright (C) 2015 - 2017 Xilinx, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	model = "Zynq CSE QSPI Board";
+	compatible = "xlnx,zynq-cse-qspi", "xlnx,zynq-7000";
+
+	aliases {
+		spi0 = &qspi;
+		serial0 = &dcc;
+	};
+
+	memory@fffc0000 {
+		device_type = "memory";
+		reg = <0xFFFC0000 0x40000>;
+	};
+
+	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>;
+		interrupt-parent = <&intc>;
+		ranges;
+
+		intc: interrupt-controller@f8f01000 {
+			compatible = "arm,cortex-a9-gic";
+			#interrupt-cells = <3>;
+			interrupt-controller;
+			reg = <0xF8F01000 0x1000>,
+			      <0xF8F00100 0x100>;
+		};
+
+		qspi: spi@e000d000 {
+			clock-names = "ref_clk", "pclk";
+			clocks = <&clkc 10>, <&clkc 43>;
+			compatible = "xlnx,zynq-qspi-1.0";
+			status = "okay";
+			interrupt-parent = <&intc>;
+			interrupts = <0 19 4>;
+			reg = <0xe000d000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			num-cs = <1>;
+			flash@0 {
+				compatible = "n25q128a11";
+				reg = <0x0>;
+				spi-tx-bus-width = <1>;
+				spi-rx-bus-width = <4>;
+				spi-max-frequency = <50000000>;
+				#address-cells = <1>;
+				#size-cells = <1>;
+				partition@qspi-fsbl-uboot {
+					label = "qspi-fsbl-uboot";
+					reg = <0x0 0x100000>;
+				};
+				partition@qspi-linux {
+					label = "qspi-linux";
+					reg = <0x100000 0x500000>;
+				};
+				partition@qspi-device-tree {
+					label = "qspi-device-tree";
+					reg = <0x600000 0x20000>;
+				};
+				partition@qspi-rootfs {
+					label = "qspi-rootfs";
+					reg = <0x620000 0x5E0000>;
+				};
+				partition@qspi-bitstream {
+					label = "qspi-bitstream";
+					reg = <0xC00000 0x400000>;
+				};
+			};
+		};
+
+		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 {
+				#clock-cells = <1>;
+				compatible = "xlnx,ps7-clkc";
+				fclk-enable = <0xf>;
+				u-boot,dm-pre-reloc;
+				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";
+};

board/xilinx/zynq/zynq-cse-qspi-single

+zynq-zc706
\ No newline at end of file

configs/zynq_cse_qspi_defconfig

+CONFIG_ARM=y
+CONFIG_SYS_CONFIG_NAME="zynq_cse"
+CONFIG_ARCH_ZYNQ=y
+CONFIG_SYS_TEXT_BASE=0xFFFC0000
+# CONFIG_ZYNQ_DDRC_INIT is not set
+CONFIG_DEFAULT_DEVICE_TREE="zynq-cse-qspi-single"
+CONFIG_DEBUG_UART=y
+# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_BOOTDELAY=-1
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_SPL=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_FPGA is not set
+# CONFIG_CMD_LOADB is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_SF=y
+# 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_NFS 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_SPL_BLK is not set
+# CONFIG_ZYNQ_GPIO is not set
+# CONFIG_MMC is not set
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DEBUG_UART_ARM_DCC=y
+CONFIG_DEBUG_UART_BASE=0x0
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_ZYNQ_QSPI=y
+# CONFIG_EFI_LOADER is not set

include/configs/zynq_cse.h

+/*
+ * (C) Copyright 2013 - 2017 Xilinx.
+ *
+ * Configuration settings for the Xilinx Zynq CSE board.
+ * See zynq-common.h for Zynq common configs
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __CONFIG_ZYNQ_CSE_H
+#define __CONFIG_ZYNQ_CSE_H
+
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#define CONFIG_SYS_DCACHE_OFF
+#define CONFIG_SYS_ICACHE_OFF
+
+#include <configs/zynq-common.h>
+
+/* Undef unneeded configs */
+#undef CONFIG_EXTRA_ENV_SETTINGS
+#undef CONFIG_BOARD_LATE_INIT
+#undef CONFIG_BOOTCOMMAND
+#undef CONFIG_ENV_SIZE
+#undef CONFIG_CMDLINE_EDITING
+#undef CONFIG_AUTO_COMPLETE
+#undef CONFIG_ZLIB
+#undef CONFIG_GZIP
+
+#undef CONFIG_SYS_LONGHELP
+
+#undef CONFIG_SYS_CBSIZE
+#undef CONFIG_BOOTM_VXWORKS
+#undef CONFIG_BOOTM_LINUX
+
+#define CONFIG_SYS_CBSIZE	1024
+
+#define CONFIG_ENV_SIZE		400
+#undef CONFIG_SYS_INIT_RAM_ADDR
+#undef CONFIG_SYS_INIT_RAM_SIZE
+#define CONFIG_SYS_INIT_RAM_ADDR	0xFFFDE000
+#define CONFIG_SYS_INIT_RAM_SIZE	0x1000
+#undef CONFIG_SPL_BSS_START_ADDR
+#undef CONFIG_SPL_BSS_MAX_SIZE
+#define CONFIG_SPL_BSS_START_ADDR	0x20000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x8000
+
+#undef CONFIG_SYS_MALLOC_LEN
+#define CONFIG_SYS_MALLOC_LEN	0x1000
+
+#define CONFIG_SYS_SDRAM_BASE	0xfffc0000
+#define CONFIG_SYS_SDRAM_SIZE	0x40000
+
+#endif /* __CONFIG_ZYNQ_CSE_H */