X-Git-Url: http://git.ozo.com/?a=blobdiff_plain;f=target%2Flinux%2Fmpc85xx%2Fpatches-4.9%2F102-powerpc-add-cmdline-override.patch;fp=target%2Flinux%2Fmpc85xx%2Fpatches-4.9%2F102-powerpc-add-cmdline-override.patch;h=3d59927d1dd4b796890d81855556a7ccf17add15;hb=8cd6686ef81effb3c30f0508368db3d0600f289d;hp=0000000000000000000000000000000000000000;hpb=a92f73e922e259fca4b357f402dd0bffe79f0bab;p=lede-git%2F.git diff --git a/target/linux/mpc85xx/patches-4.9/102-powerpc-add-cmdline-override.patch b/target/linux/mpc85xx/patches-4.9/102-powerpc-add-cmdline-override.patch new file mode 100644 index 0000000000..3d59927d1d --- /dev/null +++ b/target/linux/mpc85xx/patches-4.9/102-powerpc-add-cmdline-override.patch @@ -0,0 +1,37 @@ +--- a/arch/powerpc/Kconfig ++++ b/arch/powerpc/Kconfig +@@ -707,6 +707,14 @@ config CMDLINE_FORCE + This is useful if you cannot or don't want to change the + command-line options your boot loader passes to the kernel. + ++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 EXTRA_TARGETS + string "Additional default image types" + help +--- a/drivers/of/fdt.c ++++ b/drivers/of/fdt.c +@@ -1079,6 +1079,17 @@ int __init early_init_dt_scan_chosen(uns + if (p != NULL && l > 0) + strlcpy(data, p, min((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