arm: MediaTek: add basic support for MT7623 boards
This adds a general board file based on MT7623 SoCs from MediaTek.
As this u-boot is loaded by MTK proprietary preloader, there is no
low level initializtion codes.
Tested-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/mt7623.h b/include/configs/mt7623.h
new file mode 100644
index 0000000..68da920
--- /dev/null
+++ b/include/configs/mt7623.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Configuration for MediaTek MT7623 SoC
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#ifndef __MT7623_H
+#define __MT7623_H
+
+#include <linux/sizes.h>
+
+/* Miscellaneous configurable options */
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_INITRD_TAG
+#define CONFIG_CMDLINE_TAG
+
+#define CONFIG_SYS_MAXARGS 8
+#define CONFIG_SYS_BOOTM_LEN SZ_64M
+#define CONFIG_SYS_CBSIZE SZ_1K
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
+ sizeof(CONFIG_SYS_PROMPT) + 16)
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN SZ_4M
+
+/* Environment */
+#define CONFIG_ENV_SIZE SZ_4K
+/* Allow to overwrite serial and ethaddr */
+#define CONFIG_ENV_OVERWRITE
+
+/* Preloader -> Uboot */
+#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_TEXT_BASE + SZ_2M - \
+ GENERATED_GBL_DATA_SIZE)
+
+/* UBoot -> Kernel */
+#define CONFIG_LOADADDR 0x84000000
+#define CONFIG_SYS_LOAD_ADDR CONFIG_LOADADDR
+
+/* MMC */
+#define MMC_SUPPORTS_TUNING
+#define CONFIG_SUPPORT_EMMC_BOOT
+
+/* DRAM */
+#define CONFIG_SYS_SDRAM_BASE 0x80000000
+
+/* This is neede for kernel booting */
+#define FDT_HIGH "fdt_high=0xac000000\0"
+
+/* Extra environment variables */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+ FDT_HIGH
+
+#endif