2021-02-28 23:58:57 +00:00
|
|
|
--- a/arch/arm/Kconfig
|
|
|
|
|
+++ b/arch/arm/Kconfig
|
2021-10-27 10:10:45 +00:00
|
|
|
@@ -1794,6 +1794,14 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGL
|
2021-02-28 23:58:57 +00:00
|
|
|
|
|
|
|
|
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
|
2022-01-04 15:36:13 +00:00
|
|
|
@@ -1059,6 +1059,17 @@ int __init early_init_dt_scan_chosen(uns
|
2021-02-28 23:58:57 +00:00
|
|
|
if (p != NULL && l > 0)
|
2022-01-04 15:36:13 +00:00
|
|
|
strlcat(data, p, min_t(int, strlen(data) + (int)l, COMMAND_LINE_SIZE));
|
2021-02-28 23:58:57 +00:00
|
|
|
|
|
|
|
|
+ /* 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
|
