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- --- a/arch/arm/Kconfig
- +++ b/arch/arm/Kconfig
- @@ -1568,6 +1568,14 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEN
-
- endchoice
-
- +config CMDLINE_OVERRIDE
- + bool "Use alternative cmdline from device tree"
- + help
- + Some bootloaders may have uneditable bootargs. While CMDLINE_FORCE can
- + be used, this is not a good option for kernels that are shared across
- + devices. This setting enables using "chosen/cmdline-override" as the
- + cmdline if it exists in the device tree.
- +
- config CMDLINE
- string "Default kernel command string"
- default ""
- --- a/drivers/of/fdt.c
- +++ b/drivers/of/fdt.c
- @@ -1189,6 +1189,17 @@ int __init early_init_dt_scan_chosen(cha
- if (p != NULL && l > 0)
- strlcat(cmdline, p, min_t(int, strlen(cmdline) + (int)l, COMMAND_LINE_SIZE));
-
- + /* CONFIG_CMDLINE_OVERRIDE is used to fallback to a different
- + * device tree option of chosen/bootargs-override. This is
- + * helpful on boards where u-boot sets bootargs, and is unable
- + * to be modified.
- + */
- +#ifdef CONFIG_CMDLINE_OVERRIDE
- + p = of_get_flat_dt_prop(node, "bootargs-override", &l);
- + if (p != NULL && l > 0)
- + strlcpy(cmdline, p, min((int)l, COMMAND_LINE_SIZE));
- +#endif
- +
- handle_cmdline:
- /*
- * CONFIG_CMDLINE is meant to be a default in case nothing else
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