ARM: MediaTek: add basic support for MT8512 boards

This adds a general board file based on MT8512 SoCs from MediaTek.

Apart from the generic parts (cpu) we add some low level init codes
and initialize the early clocks.

This commit is adding the basic boot support for the MT8512 eMMC board.

Signed-off-by: mingming lee <mingming.lee@mediatek.com>

arch/arm/dts/Makefile

@@ -874,6 +874,7 @@ dtb-$(CONFIG_SOC_K3_J721E) += k3-j721e-common-proc-board.dtb \
 dtb-$(CONFIG_ARCH_MEDIATEK) += \
 	mt7623n-bananapi-bpi-r2.dtb \
 	mt7629-rfb.dtb \
+	mt8512-bm1-emmc.dtb \
 	mt8516-pumpkin.dtb \
 	mt8518-ap1-emmc.dtb
 

arch/arm/dts/mt8512-bm1-emmc.dts

@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ *
+ */
+
+/dts-v1/;
+
+#include <config.h>
+#include "mt8512.dtsi"
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	model = "MT8512 BM1 EMMC";
+
+	chosen {
+		stdout-path = &uart0;
+		tick-timer = &timer0;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x20000000>;
+	};
+
+	reg_1p8v: regulator-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_default>;
+	bus-width = <8>;
+	max-frequency = <200000000>;
+	cap-mmc-highspeed;
+	mmc-hs200-1_8v;
+	cap-mmc-hw-reset;
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	non-removable;
+	status = "okay";
+};
+
+&pinctrl {
+	mmc0_pins_default: mmc0default {
+		mux {
+			function = "msdc";
+			groups =  "msdc0";
+		};
+
+		conf-cmd-data {
+			pins = "MSDC0_CMD", "MSDC0_DAT0", "MSDC0_DAT1",
+			       "MSDC0_DAT2", "MSDC0_DAT3", "MSDC0_DAT4",
+			       "MSDC0_DAT5", "MSDC0_DAT6", "MSDC0_DAT7";
+			input-enable;
+			drive-strength = <6>;
+			bias-pull-up;
+		};
+
+		conf-clk {
+			pins = "MSDC0_CLK";
+			drive-strength = <6>;
+			bias-pull-down;
+		};
+
+		conf-rst {
+			pins = "MSDC0_RSTB";
+			bias-pull-up;
+		};
+	};
+
+		uart0_pins: uart0 {
+			mux {
+				function = "uart";
+				groups = "uart0_0_rxd_txd";
+			};
+		};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&watchdog0 {
+	status = "okay";
+};

board/mediatek/mt8512/Kconfig

@@ -0,0 +1,14 @@
+if TARGET_MT8512
+
+config SYS_BOARD
+	default "mt8512"
+
+config SYS_CONFIG_NAME
+	default "mt8512"
+
+
+config MTK_BROM_HEADER_INFO
+	string
+	default "media=nor"
+
+endif

board/mediatek/mt8512/MAINTAINERS

@@ -0,0 +1,6 @@
+MT8512
+M:	Mingming lee <mingming.lee@mediatek.com>
+S:	Maintained
+F:	board/mediatek/mt8512
+F:	include/configs/mt8512.h
+F:	configs/mt8512_bm1_emmc_defconfig

board/mediatek/mt8512/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += mt8512.o

board/mediatek/mt8512/mt8512.c

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <wdt.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = gd->ram_base + 0x100;
+
+	debug("gd->fdt_blob is %p\n", gd->fdt_blob);
+	return 0;
+}

configs/mt8512_bm1_emmc_defconfig

@@ -0,0 +1,44 @@
+CONFIG_ARM=y
+CONFIG_POSITION_INDEPENDENT=y
+CONFIG_ARCH_MEDIATEK=y
+CONFIG_SYS_TEXT_BASE=0x44e00000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_TARGET_MT8512=y
+CONFIG_SYS_PROMPT="MT8512> "
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_OF_LIBFDT=y
+# CONFIG_FDT_DEBUG is not set
+CONFIG_LZMA=y
+CONFIG_LZ4=y
+CONFIG_LZO=y
+CONFIG_GZIP=y
+CONFIG_BZIP2=y
+CONFIG_CMD_BOOTMENU=y
+CONFIG_MENU_SHOW=y
+CONFIG_DEFAULT_FDT_FILE="mt8512-bm1-emmc.dtb"
+CONFIG_DEFAULT_DEVICE_TREE="mt8512-bm1-emmc"
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_MT8512=y
+CONFIG_PINCONF=y
+CONFIG_DM_GPIO=y
+CONFIG_RAM=y
+CONFIG_BAUDRATE=921600
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_DM=y
+# CONFIG_DM_DEBUG is not set
+CONFIG_DM_SERIAL=y
+CONFIG_MTK_SERIAL=y
+CONFIG_WDT=y
+CONFIG_WDT_MTK=y
+CONFIG_CLK=y
+CONFIG_TIMER=y
+CONFIG_MTK_TIMER=y
+CONFIG_CMD_MMC=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_MTK=y
+CONFIG_MMC_HS200_SUPPORT=y
+CONFIG_ENV_SIZE=0x1000
+# CONFIG_ENV_IS_IN_MMC is not set

include/configs/mt8512.h

@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Configuration for MediaTek MT8512 SoC
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+#ifndef __MT8512_H
+#define __MT8512_H
+
+#include <linux/sizes.h>
+
+#define CONFIG_SYS_NONCACHED_MEMORY		SZ_1M
+
+#define CONFIG_CPU_ARMV8
+
+#define COUNTER_FREQUENCY			13000000
+
+#define CONFIG_SYS_LOAD_ADDR			0x41000000
+#define CONFIG_LOADADDR				CONFIG_SYS_LOAD_ADDR
+
+#define CONFIG_SYS_MALLOC_LEN			SZ_32M
+#define CONFIG_SYS_BOOTM_LEN			SZ_64M
+
+/* Uboot definition */
+#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)
+
+/* ENV Setting */
+#if defined(CONFIG_MMC_MTK)
+#define CONFIG_SYS_MMC_ENV_DEV			0
+#define CONFIG_ENV_OVERWRITE
+
+/* MMC offset in block unit,and block size is 0x200 */
+#define ENV_BOOT_READ_IMAGE \
+	"boot_rd_img=mmc dev 0" \
+	";mmc read ${loadaddr} 0x27000 0x8000" \
+	";iminfo ${loadaddr}\0"
+#endif
+
+/* Console configuration */
+#define ENV_DEVICE_SETTINGS \
+	"stdin=serial\0" \
+	"stdout=serial\0" \
+	"stderr=serial\0"
+
+#define ENV_BOOT_CMD \
+	"mtk_boot=run boot_rd_img;bootm;\0"
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"fdt_high=0x6c000000\0" \
+	ENV_DEVICE_SETTINGS \
+	ENV_BOOT_READ_IMAGE \
+	ENV_BOOT_CMD \
+	"bootcmd=run mtk_boot;\0" \
+
+#endif