ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/target/linux/generic/pending-5.4/400-mtd-add-rootfs-split-support.patch b/target/linux/generic/pending-5.4/400-mtd-add-rootfs-split-support.patch
new file mode 100644
index 0000000..147dfba
--- /dev/null
+++ b/target/linux/generic/pending-5.4/400-mtd-add-rootfs-split-support.patch
@@ -0,0 +1,108 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: make rootfs split/detection more generic - patch can be moved to generic-2.6 after testing on other platforms
+
+lede-commit: 328e660b31f0937d52c5ae3d6e7029409918a9df
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ drivers/mtd/Kconfig | 17 +++++++++++++++++
+ drivers/mtd/mtdpart.c | 35 +++++++++++++++++++++++++++++++++++
+ include/linux/mtd/partitions.h | 2 ++
+ 3 files changed, 54 insertions(+)
+
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -12,6 +12,23 @@ menuconfig MTD
+
+ if MTD
+
++menu "OpenWrt specific MTD options"
++
++config MTD_ROOTFS_ROOT_DEV
++ bool "Automatically set 'rootfs' partition to be root filesystem"
++ default y
++
++config MTD_SPLIT_FIRMWARE
++ bool "Automatically split firmware partition for kernel+rootfs"
++ default y
++
++config MTD_SPLIT_FIRMWARE_NAME
++ string "Firmware partition name"
++ depends on MTD_SPLIT_FIRMWARE
++ default "firmware"
++
++endmenu
++
+ config MTD_TESTS
+ tristate "MTD tests support (DANGEROUS)"
+ depends on m
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -15,11 +15,13 @@
+ #include <linux/kmod.h>
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
++#include <linux/magic.h>
+ #include <linux/err.h>
+ #include <linux/of.h>
+ #include <linux/of_platform.h>
+
+ #include "mtdcore.h"
++#include "mtdsplit/mtdsplit.h"
+
+ /* Our partition linked list */
+ static LIST_HEAD(mtd_partitions);
+@@ -39,6 +41,8 @@ struct mtd_part {
+ struct list_head list;
+ };
+
++static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
++
+ /*
+ * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
+ * the pointer to that structure.
+@@ -613,6 +617,7 @@ int mtd_add_partition(struct mtd_info *p
+ if (ret)
+ goto err_remove_part;
+
++ mtd_partition_split(parent, new);
+ mtd_add_partition_attrs(new);
+
+ return 0;
+@@ -699,6 +704,29 @@ int mtd_del_partition(struct mtd_info *m
+ }
+ EXPORT_SYMBOL_GPL(mtd_del_partition);
+
++#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
++#else
++#define SPLIT_FIRMWARE_NAME "unused"
++#endif
++
++static void split_firmware(struct mtd_info *master, struct mtd_part *part)
++{
++}
++
++static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
++{
++ static int rootfs_found = 0;
++
++ if (rootfs_found)
++ return;
++
++ if (IS_ENABLED(CONFIG_MTD_SPLIT_FIRMWARE) &&
++ !strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
++ !of_find_property(mtd_get_of_node(&part->mtd), "compatible", NULL))
++ split_firmware(master, part);
++}
++
+ /*
+ * This function, given a master MTD object and a partition table, creates
+ * and registers slave MTD objects which are bound to the master according to
+@@ -739,6 +767,7 @@ int add_mtd_partitions(struct mtd_info *
+ goto err_del_partitions;
+ }
+
++ mtd_partition_split(master, slave);
+ mtd_add_partition_attrs(slave);
+ /* Look for subpartitions */
+ parse_mtd_partitions(&slave->mtd, parts[i].types, NULL);