mips: Add Gardena Smart-Gateway board support

The Gardena Smart-Gateway boards have a MT7688 SoC with 128 MiB of RAM
and 8 MiB of flash (SPI NOR) and additional 128MiB SPI NAND storage.

This patch also includes 2 targets. One is the target that can be
programmed into the SPI NOR flash and a 2nd target "xxx-ram" is
added to support loading and booting via an already running U-Boot
version. This allows easy development and testing without the
need to flash the image each time.

Signed-off-by: Stefan Roese <sr@denx.de>
[fixed and regenerated defconfig files]
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/dts/gardena-smart-gateway-mt7688.dts

@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+/dts-v1/;
+
+#include "mt7628a.dtsi"
+
+/ {
+	compatible = "gardena,smart-gateway-mt7688", "ralink,mt7628a-soc";
+	model = "Gardena smart-Gateway-MT7688";
+
+	aliases {
+		serial0 = &uart0;
+		spi0 = &spi0;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x08000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+		stdout-path = &uart0;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	clock-frequency = <40000000>;
+};
+
+&spi0 {
+	status = "okay";
+	num-cs = <2>;
+
+	spi-flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-flash", "jedec,spi-nor";
+		spi-max-frequency = <40000000>;
+		reg = <0>;
+	};
+
+	spi-nand@1 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-nand";
+		spi-max-frequency = <40000000>;
+		reg = <1>;
+	};
+};

arch/mips/mach-mt7620/Kconfig

@@ -21,6 +21,14 @@ endchoice
 choice
 	prompt "Board select"
 
+config BOARD_GARDENA_SMART_GATEWAY_MT7688
+	bool "Gardena Smart Gateway"
+	depends on SOC_MT7620
+	select SUPPORTS_BOOT_RAM
+	help
+	  Gardena Smart Gateway boards have a MT7688 SoC with 128 MiB of RAM
+	  and 8 MiB of flash (SPI NOR) and additional SPI NAND storage.
+
 config BOARD_LINKIT_SMART_7688
 	bool "LinkIt Smart 7688"
 	depends on SOC_MT7620
@@ -121,6 +129,7 @@ endchoice
 config SUPPORTS_BOOT_RAM
 	bool
 
+source "board/gardena/smart-gateway-mt7688/Kconfig"
 source "board/seeed/linkit-smart-7688/Kconfig"
 
 endmenu

board/gardena/smart-gateway-mt7688/Kconfig

@@ -0,0 +1,12 @@
+if BOARD_GARDENA_SMART_GATEWAY_MT7688
+
+config SYS_BOARD
+	default "smart-gateway-mt7688"
+
+config SYS_VENDOR
+	default "gardena"
+
+config SYS_CONFIG_NAME
+	default "gardena-smart-gateway-mt7688"
+
+endif

board/gardena/smart-gateway-mt7688/MAINTAINERS

@@ -0,0 +1,8 @@
+GARDENA_SMART_GATEWAY_MT7688 BOARD
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+F:	board/gardena/smart-gateway-mt7688
+F:	include/configs/gardena-smart-gateway-mt7688.h
+F:	configs/gardena-smart-gateway-mt7688_defconfig
+F:	configs/gardena-smart-gateway-mt7688-ram_defconfig
+F:	arch/mips/dts/gardena-smart-gateway-mt7688.dts

board/gardena/smart-gateway-mt7688/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += board.o

board/gardena/smart-gateway-mt7688/board.c

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+int board_early_init_f(void)
+{
+	/*
+	 * Nothing to be done here for this board (no UART setup etc)
+	 * right now. We might need some pin muxing, so lets keep this
+	 * function for now.
+	 */
+	return 0;
+}

configs/gardena-smart-gateway-mt7688-ram_defconfig

@@ -0,0 +1,55 @@
+CONFIG_MIPS=y
+CONFIG_SYS_TEXT_BASE=0x80010000
+CONFIG_ARCH_MT7620=y
+# CONFIG_MIPS_BOOT_CMDLINE_LEGACY is not set
+# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_NR_DRAM_BANKS=1
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CPU=y
+CONFIG_CMD_LICENSE=y
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_MEMINFO=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_TIME=y
+CONFIG_MTDIDS_DEFAULT="spi-nand0=spi-nand0"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=spi-nand0:-(ubi)"
+CONFIG_CMD_UBI=y
+CONFIG_OF_EMBED=y
+CONFIG_DEFAULT_DEVICE_TREE="gardena-smart-gateway-mt7688"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+# CONFIG_DM_DEVICE_REMOVE is not set
+CONFIG_HAVE_BLOCK_DEVICE=y
+CONFIG_CLK=y
+CONFIG_CPU=y
+CONFIG_DM_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_MTD=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_RAM=y
+CONFIG_DM_RESET=y
+CONFIG_BAUDRATE=57600
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_SYSRESET_SYSCON=y

configs/gardena-smart-gateway-mt7688_defconfig

@@ -0,0 +1,58 @@
+CONFIG_MIPS=y
+CONFIG_SYS_TEXT_BASE=0x9c000000
+CONFIG_ARCH_MT7620=y
+CONFIG_BOOT_ROM=y
+CONFIG_ONBOARD_DDR2_SIZE_1024MBIT=y
+CONFIG_ONBOARD_DDR2_CHIP_WIDTH_16BIT=y
+# CONFIG_MIPS_BOOT_CMDLINE_LEGACY is not set
+# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_NR_DRAM_BANKS=1
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CPU=y
+CONFIG_CMD_LICENSE=y
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_MEMINFO=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_TIME=y
+CONFIG_MTDIDS_DEFAULT="spi-nand0=spi-nand0"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=spi-nand0:-(ubi)"
+CONFIG_CMD_UBI=y
+CONFIG_OF_EMBED=y
+CONFIG_DEFAULT_DEVICE_TREE="gardena-smart-gateway-mt7688"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+# CONFIG_DM_DEVICE_REMOVE is not set
+CONFIG_HAVE_BLOCK_DEVICE=y
+CONFIG_CLK=y
+CONFIG_CPU=y
+CONFIG_DM_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_MTD=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_RAM=y
+CONFIG_DM_RESET=y
+CONFIG_BAUDRATE=57600
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_SYSRESET_SYSCON=y

include/configs/gardena-smart-gateway-mt7688.h

@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+#ifndef __CONFIG_GARDENA_SMART_GATEWAY_H
+#define __CONFIG_GARDENA_SMART_GATEWAY_H
+
+/* CPU */
+#define CONFIG_SYS_MIPS_TIMER_FREQ	200000000
+
+/* RAM */
+#define CONFIG_SYS_SDRAM_BASE		0x80000000
+
+#define CONFIG_SYS_LOAD_ADDR		CONFIG_SYS_SDRAM_BASE + 0x100000
+
+#define CONFIG_SYS_INIT_SP_OFFSET	0x400000
+
+#ifdef CONFIG_BOOT_RAM
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#endif
+
+/* UART */
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200, \
+					  230400, 500000, 1500000 }
+
+/* RAM */
+#define CONFIG_SYS_MEMTEST_START	0x80100000
+#define CONFIG_SYS_MEMTEST_END		0x80400000
+
+/* Memory usage */
+#define CONFIG_SYS_MAXARGS		64
+#define CONFIG_SYS_MALLOC_LEN		(1024 * 1024)
+#define CONFIG_SYS_BOOTPARAMS_LEN	(128 * 1024)
+#define CONFIG_SYS_CBSIZE		512
+
+/* U-Boot */
+#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
+
+/* Environment settings */
+#define CONFIG_ENV_OFFSET		0x80000
+#define CONFIG_ENV_SIZE			(64 << 10)
+#define CONFIG_ENV_SECT_SIZE		(64 << 10)
+#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+#define CONFIG_ENV_OFFSET_REDUND	(CONFIG_ENV_OFFSET + \
+						CONFIG_ENV_SECT_SIZE)
+#define CONFIG_ENV_SIZE_REDUND		CONFIG_ENV_SIZE
+
+/*
+ * Environment is right behind U-Boot in flash. Make sure U-Boot
+ * doesn't grow into the environment area.
+ */
+#define CONFIG_BOARD_SIZE_LIMIT		CONFIG_ENV_OFFSET
+
+#endif /* __CONFIG_GARDENA_SMART_GATEWAY_H */