IMX6ULL——U-boot移植（超级详细，手把手教学）（二）

移植U-boot修改源码

完善驱动参数

复制并修改配置参数

在这一步我们复制官方的参数配置文件，并在此基础上修改为适合我们自己板子的文件

在 configs 目录下创建默认配置文件，复制 mx6ull_14x14_evk_emmc_defconfig，然后重命名为 mx6ull_myboard_emmc_defconfig

cd configs/
cp mx6ull_14x14_evk_emmc_defconfig  mx6ull_myboard_emmc_defconfig
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修改我们刚刚复制出来文件的参数

sudo gedit mx6ull_myboard_emmc_defconfig
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在这里我们使用双击的方式或者命令的方式打开文件

修改文件内容如下：

CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ull_myboard_emmc/imximage.cfg,MX6ULL_EVK_EMMC_REWORK"
CONFIG_ARM=y
CONFIG_ARCH_MX6=y
CONFIG_TARGET_MX6ULL_MYBOARD_EMMC=y
CONFIG_CMD_GPIO=y
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在这里我们要注意的是最后一行，后面不要带有空格或是换行，否则.imx无法编译成功

添加头文件

在include/configs文件目录下，复 制include/configs/mx6ullevk.h，并重命名为mx6ull_myboard_emmc.h

cp include/configs/mx6ullevk.h include/configs/mx6ull_myboard_emmc.h
gedit include/configs/mx6ull_myboard_emmc.h
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替换恒定义头文件(第八行九行)

#ifndef __MX6ULL_MYBOARD_EMMC_CONFIG_H
#define __MX6ULL_MYBOARD_EMMC_CONFIG_H

修改DDR的大小

替换为：

#define is_mx6ull_9x9_evk()	CONFIG_IS_ENABLED(PHYS_SDRAM_SIZE)

#ifdef CONFIG_TARGET_MX6ULL_9X9_EVK
#define PHYS_SDRAM_SIZE		SZ_256M
#define CONFIG_BOOTARGS_CMA_SIZE   "cma=96M "
#else
#define PHYS_SDRAM_SIZE		SZ_512M
#define CONFIG_BOOTARGS_CMA_SIZE   "cma=96M "
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修改LCD驱动

#if defined(CONFIG_SYS_BOOT_NAND)
#define CONFIG_EXTRA_ENV_SETTINGS \
	CONFIG_MFG_ENV_SETTINGS \
	"panel=TFT43AB\0" \
	"fdt_addr=0x83000000\0" \
	"fdt_high=0xffffffff\0"	  \
	"console=ttymxc0\0" \
	"bootargs=console=ttymxc0,115200 ubi.mtd=4 "  \
		"root=ubi0:rootfs rootfstype=ubifs "		     \
		CONFIG_BOOTARGS_CMA_SIZE \
		"mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),1m(misc),-(rootfs)\0"\
	"bootcmd=nand read ${loadaddr} 0x4000000 0x800000;"\
		"nand read ${fdt_addr} 0x5000000 0x100000;"\
		"bootz ${loadaddr} - ${fdt_addr}\0"

#else
#define CONFIG_EXTRA_ENV_SETTINGS \
	CONFIG_MFG_ENV_SETTINGS \
	"script=boot.scr\0" \
	"image=zImage\0" \
	"console=ttymxc0\0" \
	"fdt_high=0xffffffff\0" \
	"initrd_high=0xffffffff\0" \
	"fdt_file=undefined\0" \
	"fdt_addr=0x83000000\0" \
	"boot_fdt=try\0" \
	"ip_dyn=yes\0" \
	"panel=TFT43AB\0" \
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替换代码(注意代码对应行数)

#if defined(CONFIG_SYS_BOOT_NAND)
#define CONFIG_EXTRA_ENV_SETTINGS \
	CONFIG_MFG_ENV_SETTINGS \
	"panel=ATK_TFT\0" \
	"fdt_addr=0x83000000\0" \
	"fdt_high=0xffffffff\0"	  \
	"console=ttymxc0\0" \
	"bootargs=console=ttymxc0,115200 ubi.mtd=4 "  \
		"root=ubi0:rootfs rootfstype=ubifs "		     \
		CONFIG_BOOTARGS_CMA_SIZE \
		"mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),1m(misc),-(rootfs)\0"\
	"bootcmd=nand read ${loadaddr} 0x4000000 0x800000;"\
		"nand read ${fdt_addr} 0x5000000 0x100000;"\
		"bootz ${loadaddr} - ${fdt_addr}\0"

#else
#define CONFIG_EXTRA_ENV_SETTINGS \
	CONFIG_MFG_ENV_SETTINGS \
	"script=boot.scr\0" \
	"image=zImage\0" \
	"console=ttymxc0\0" \
	"fdt_high=0xffffffff\0" \
	"initrd_high=0xffffffff\0" \
	"fdt_file=undefined\0" \
	"fdt_addr=0x83000000\0" \
	"boot_fdt=try\0" \
	"ip_dyn=yes\0" \
	"panel=ATK_TFT\0" \

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修改文件索引

"if test $board_name = EVK && test $board_rev = 9X9; then " \
					"setenv fdt_file imx6ull-9x9-evk.dtb; fi; " \
				"if test $board_name = EVK && test $board_rev = 14X14; then " \
					"setenv fdt_file imx6ull-14x14-evk.dtb; fi; " \
				"if test $fdt_file = undefined; then " \
					"echo WARNING: Could not determine dtb to use; fi; " \
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修改为

"setenv fdt_file imx6ull-myboard-emmc.dtb; " \
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修改网口为0，且使用SMSC芯片

#define CONFIG_FEC_MXC_PHYADDR          0x2
#define CONFIG_FEC_XCV_TYPE             RMII
#elif (CONFIG_FEC_ENET_DEV == 1)
#define IMX_FEC_BASE			ENET2_BASE_ADDR
#define CONFIG_FEC_MXC_PHYADDR		0x1
#define CONFIG_FEC_XCV_TYPE		RMII
#endif
#define CONFIG_ETHPRIME			"FEC"

#define CONFIG_PHYLIB
#define CONFIG_PHY_MICREL
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修改为

#define CONFIG_FEC_MXC_PHYADDR          0x0
#define CONFIG_FEC_XCV_TYPE             RMII
#elif (CONFIG_FEC_ENET_DEV == 1)
#define IMX_FEC_BASE			ENET2_BASE_ADDR
#define CONFIG_FEC_MXC_PHYADDR		0x1
#define CONFIG_FEC_XCV_TYPE		RMII
#endif
#define CONFIG_ETHPRIME			"FEC"

#define CONFIG_PHYLIB
#define CONFIG_PHY_SMSC
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到这里，头文件就修改完成了！