diff options
| -rw-r--r-- | target/linux/ipq806x/patches-5.15/900-arm-add-cmdline-override.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-5.15/900-arm-add-cmdline-override.patch b/target/linux/ipq806x/patches-5.15/900-arm-add-cmdline-override.patch new file mode 100644 index 0000000000..23cec10f44 --- /dev/null +++ b/target/linux/ipq806x/patches-5.15/900-arm-add-cmdline-override.patch @@ -0,0 +1,37 @@ +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -1740,6 +1740,14 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGL + + 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 +@@ -1162,6 +1162,17 @@ int __init early_init_dt_scan_chosen(uns + if (p != NULL && l > 0) + strlcat(data, p, min_t(int, strlen(data) + (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(data, p, min((int)l, COMMAND_LINE_SIZE)); ++#endif ++ + /* + * CONFIG_CMDLINE is meant to be a default in case nothing else + * managed to set the command line, unless CONFIG_CMDLINE_FORCE |