Enabling uboot.env in LA1224RDB

harisankar2001 — Thu, 04 May 2023 12:09:35 GMT

Hi,

Let me explain my issues in detail. My requirement is to change the value of the u-boot environment variable in Linux user space, which should be reflected back in the u-boot on LA1224RDB using SDK 2.2. In which, I have added a new environment variable named slot=1 in the file include/configs/lx2160a_common.h in the u-boot source code. But, I need to change the variable in linux user space. So further I tried to create a file to store the u-boot environment variable, so I enabled the file in tools/env/fw_env.config to save the u-boot environment variables, as below.

#cat /etc/fw_env.config

# On a block device a negative offset is treated as a backwards offset from the

# end of the device/partition, rather than a forwards offset from the start.

# Block device example

/dev/mmcblk1 0x500000 0x2000

# VFAT example

/uboot.env 0x0000 0x4000

My issue is that when i try to store the u-boot environment variable in a file named uboot.env, i couldn’t be able to create the file that stores the variable. I tried to enable the file to store the u-boot environment variable in deconfig file and but i couldn’t find the uboot.env file in linux user space.

Changes in kernel and u-boot:

In include/configs/lx2160a_common.h,

#define CONFIG_SYS_MMC_ENV_DEV 0 —-> 1

In configs/la1224rdb_tfa_defconfig

CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y

CONFIG_ENV_IS_IN_EXT4=y

CONFIG_ENV_EXT4_INTERFACE="mmc"

CONFIG_ENV_EXT4_DEVICE_AND_PART="1:2"

CONFIG_ENV_EXT4_FILE="/uboot.env"

Re: Enabling uboot.env in LA1224RDB

yipingwang — Fri, 05 May 2023 07:19:33 GMT

You could execute the following command to save u-boot env in /uboot.env.

# fw_printenv -c /etc/fw_env.config>/uboot.env

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Enabling uboot.env in LA1224RDB

Re: Enabling uboot.env in LA1224RDB