[IMX6Q]uboot_v2015.04移植

u-boot版本: v2015.04
branch: imx_v2015.04_3.14.52_1.1.0_ga

我们硬件参考的是sabresd demo板子，由于此branch没有对应mx6qsabresd目录，

所以参考mx6sabresd来移植了，经验证也可以开机。

以下是移植步骤：

1.

#cp -rf board/freescale/mx6sabresd board/freescale/mx6qecovacs

2.

#cp include/configs/mx6sabresd.h  include/configs/mx6qecovacs.h

3.

#cp configs/mx6sabresdandroid_defconfig configs/mx6qecovacsandroid_defconfig

修改内容为

CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6qecovacs/mx6qecovacs.cfg,MX6Q,ANDROID_SUPPORT"
CONFIG_ARM=y
CONFIG_TARGET_MX6QECOVACS=y
CONFIG_SYS_MALLOC_F=y
CONFIG_SYS_MALLOC_F_LEN=0x400
CONFIG_DM=y
CONFIG_DM_THERMAL=y

4.

#mv board/freescale/mx6qecovacs/mx6sabresd.c board/freescale/mx6qecovacs/mx6qecovacs.c

5.

修改board/freescale/mx6qecovacs/Makefile

obj-y  := mx6sabresd.o

为

obj-y  := mx6qecovacs.o

6.
修改board/freescale/mx6qecovacs/Kconfig

if TARGET_MX6QECOVACS
config SYS_BOARD
    default "mx6qecovacs"

config SYS_VENDOR
    default "freescale"

config SYS_SOC
    default "mx6"

config SYS_CONFIG_NAME
    default "mx6qecovacs"

endif

7.
添加如下内容到 arch/arm/Kconfig

config TARGET_MX6QECOVACS
    bool "Support mx6qecovacs"
    select CPU_V7
    select SUPPORT_SPL

以及

source "board/freescale/mx6qecovacs/Kconfig"

8.

板子使用uart2，所以修改include/configs/mx6qecovacs.h

#define CONFIG_MXC_UART_BASE    UART4_BASE

为

#define CONFIG_MXC_UART_BASE    UART2_BASE

修改board/freescale/mx6qecovacs/mx6qecovacs.c

static void setup_iomux_uart(void)
{
    //imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
    imx_iomux_v3_setup_multiple_pads(uart2_pads, ARRAY_SIZE(uart2_pads));
}
static iomux_v3_cfg_t const uart2_pads[] = {
    MX6_PAD_GPIO_7__UART2_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
    MX6_PAD_GPIO_8__UART2_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
};

9.

#cp board/freescale/mx6qecovacs/mx6dl.cfg  board/freescale/mx6qecovacs/mx6qecovacs.cfg

10.
编写编译脚本build_u_boot.sh

#!/bin/bash
export ARCH=arm
export CROSS_COMPILE=~/daogou/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
make distclean
make mx6qecovacsandroid_config
make

11.

download u-boot到SD card.

# sudo dd if=u-boot.imx of=/dev/sdx bs=1K seek=1; sync

开机：