[参考译文] AM62A7：无法从 eMMC 引导

您好：

“mmc partconf“和“mmc bootbus“命令可以保存在 SD 卡 FAT 分区中的 uEnv.txt 文件中。 该文件由 A53 U-Boot 加载、允许在引导 Linux 之前运行某些命令。

[11:26:59.257] root@am62xx-lp-evm:/run/media/boot-mmcblk1p1# cat uEnv.txt
[11:27:01.512] # This uEnv.txt file can contain additional environment settings that you
[11:27:01.531] # want to set in U-Boot at boot time.  This can be simple variables such
[11:27:01.536] # as the serverip or custom variables.  The format of this file is:
[11:27:01.540] #    variable=value
[11:27:01.545] # NOTE: This file will be evaluated after the bootcmd is run and the
[11:27:01.549] #       bootcmd must be set to load this file if it exists (this is the
[11:27:01.553] #       default on all newer U-Boot images.  This also means that some
[11:27:01.563] #       variables such as bootdelay cannot be changed by this file since
[11:27:01.566] #       it is not evaluated until the bootcmd is run.

[11:27:01.569] uenvcmd=mmc partconf 0 1 1 1;mmc bootbus 0 2 0 0

必须直接在 A53 U-Boot 的 U-Boot 源代码中修改环境变量“mmcdev"和“和“bootpart"，“，以便、以便从 eMMC 自动引导 Linux。

diff --git a/board/ti/am62ax/am62ax.env b/board/ti/am62ax/am62ax.env
index f36ac17593f..ea0d81b11fe 100644
--- a/board/ti/am62ax/am62ax.env
+++ b/board/ti/am62ax/am62ax.env
@@ -14,8 +14,8 @@ run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}
 
 boot_targets=mmc1 mmc0 usb pxe dhcp
 boot=mmc
-mmcdev=1
-bootpart=1:2
+mmcdev=0
+bootpart=0:1
 bootdir=/boot
 rd_spec=-
 rproc_fw_binaries= 0 /lib/firmware/am62a-mcu-r5f0_0-fw 2 /lib/firmware/am62a-c71_0-fw