kernel: backport mtd support for subpartitions in DT

This is a new & warm feature that allows nesting partiitons in DT and
mixing their types (e.g. static vs. dynamic). It's very useful for
boards that have most partitions static but some of them require extra
parsing (e.g. a "firmware" partition).

It's required to successfully backport support for new devices using
that new syntax in their DT files.

Since brcm63xx has a custom alternative patch the upstream one is being
reverted for it. The plan is to make brcm63xx use the upstream
implementation.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 2a598bbaa3f75b7051c2453a6ccf706191cf2153)

8 files changed, 20 insertions, 20 deletions

diff --git a/target/linux/generic/pending-4.9/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch b/target/linux/generic/pending-4.9/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
index e2a0e4887d..1b6290fca2 100644
--- a/target/linux/generic/pending-4.9/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
+++ b/target/linux/generic/pending-4.9/161-mtd-part-add-generic-parsing-of-linux-part-probe.patch
@@ -114,7 +114,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  #include <linux/err.h>
  #include <linux/of.h>
  
-@@ -843,6 +844,42 @@ void deregister_mtd_parser(struct mtd_pa
+@@ -827,6 +828,42 @@ void deregister_mtd_parser(struct mtd_pa
  EXPORT_SYMBOL_GPL(deregister_mtd_parser);
  
  /*
@@ -157,7 +157,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
   * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
   * are changing this array!
   */
-@@ -983,6 +1020,13 @@ int parse_mtd_partitions(struct mtd_info
+@@ -975,6 +1012,13 @@ int parse_mtd_partitions(struct mtd_info
  	struct mtd_partitions pparts = { };
  	struct mtd_part_parser *parser;
  	int ret, err = 0;
@@ -170,8 +170,8 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
 +	}
  
  	if (!types)
- 		types = default_mtd_part_types;
-@@ -1023,6 +1067,7 @@ int parse_mtd_partitions(struct mtd_info
+ 		types = mtd_is_partition(master) ? default_subpartition_types :
+@@ -1016,6 +1060,7 @@ int parse_mtd_partitions(struct mtd_info
  		if (ret < 0 && !err)
  			err = ret;
  	}
diff --git a/target/linux/generic/pending-4.9/400-mtd-add-rootfs-split-support.patch b/target/linux/generic/pending-4.9/400-mtd-add-rootfs-split-support.patch
index 10be7a16ab..b0cb273141 100644
--- a/target/linux/generic/pending-4.9/400-mtd-add-rootfs-split-support.patch
+++ b/target/linux/generic/pending-4.9/400-mtd-add-rootfs-split-support.patch
@@ -60,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  /*
   * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
   * the pointer to that structure.
-@@ -666,6 +670,7 @@ int mtd_add_partition(struct mtd_info *p
+@@ -650,6 +654,7 @@ int mtd_add_partition(struct mtd_info *p
  	mutex_unlock(&mtd_partitions_mutex);
  
  	add_mtd_device(&new->mtd);
@@ -68,7 +68,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  	mtd_add_partition_attrs(new);
  
-@@ -744,6 +749,35 @@ int mtd_del_partition(struct mtd_info *m
+@@ -728,6 +733,35 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -104,14 +104,14 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  /*
   * 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
-@@ -775,6 +809,7 @@ int add_mtd_partitions(struct mtd_info *
+@@ -759,6 +793,7 @@ int add_mtd_partitions(struct mtd_info *
  		mutex_unlock(&mtd_partitions_mutex);
  
  		add_mtd_device(&slave->mtd);
 +		mtd_partition_split(master, slave);
  		mtd_add_partition_attrs(slave);
- 		if (parts[i].types)
- 			mtd_parse_part(slave, parts[i].types);
+ 		/* Look for subpartitions */
+ 		parse_mtd_partitions(&slave->mtd, parts[i].types, NULL);
 --- a/include/linux/mtd/partitions.h
 +++ b/include/linux/mtd/partitions.h
 @@ -110,5 +110,7 @@ int mtd_add_partition(struct mtd_info *m
diff --git a/target/linux/generic/pending-4.9/401-mtd-add-support-for-different-partition-parser-types.patch b/target/linux/generic/pending-4.9/401-mtd-add-support-for-different-partition-parser-types.patch
index 63affd7eed..1188cc656f 100644
--- a/target/linux/generic/pending-4.9/401-mtd-add-support-for-different-partition-parser-types.patch
+++ b/target/linux/generic/pending-4.9/401-mtd-add-support-for-different-partition-parser-types.patch
@@ -9,7 +9,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -1122,6 +1122,62 @@ void mtd_part_parser_cleanup(struct mtd_
+@@ -1115,6 +1115,62 @@ void mtd_part_parser_cleanup(struct mtd_
  	}
  }
  
diff --git a/target/linux/generic/pending-4.9/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch b/target/linux/generic/pending-4.9/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
index 10d8551482..9c2650b45f 100644
--- a/target/linux/generic/pending-4.9/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
+++ b/target/linux/generic/pending-4.9/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
@@ -10,7 +10,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -749,6 +749,36 @@ int mtd_del_partition(struct mtd_info *m
+@@ -733,6 +733,36 @@ int mtd_del_partition(struct mtd_info *m
  }
  EXPORT_SYMBOL_GPL(mtd_del_partition);
  
@@ -47,7 +47,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -757,6 +787,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
+@@ -741,6 +771,7 @@ EXPORT_SYMBOL_GPL(mtd_del_partition);
  
  static void split_firmware(struct mtd_info *master, struct mtd_part *part)
  {
@@ -55,7 +55,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  }
  
  void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
-@@ -771,6 +802,12 @@ static void mtd_partition_split(struct m
+@@ -755,6 +786,12 @@ static void mtd_partition_split(struct m
  	if (rootfs_found)
  		return;
  
diff --git a/target/linux/generic/pending-4.9/404-mtd-add-more-helper-functions.patch b/target/linux/generic/pending-4.9/404-mtd-add-more-helper-functions.patch
index 076ec314b2..886dece4f7 100644
--- a/target/linux/generic/pending-4.9/404-mtd-add-more-helper-functions.patch
+++ b/target/linux/generic/pending-4.9/404-mtd-add-more-helper-functions.patch
@@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 
 --- a/drivers/mtd/mtdpart.c
 +++ b/drivers/mtd/mtdpart.c
-@@ -779,6 +779,17 @@ run_parsers_by_type(struct mtd_part *sla
+@@ -763,6 +763,17 @@ run_parsers_by_type(struct mtd_part *sla
  	return nr_parts;
  }
  
@@ -29,7 +29,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
  #else
-@@ -1232,6 +1243,24 @@ int mtd_is_partition(const struct mtd_in
+@@ -1225,6 +1236,24 @@ int mtd_is_partition(const struct mtd_in
  }
  EXPORT_SYMBOL_GPL(mtd_is_partition);
  
diff --git a/target/linux/generic/pending-4.9/411-mtd-partial_eraseblock_write.patch b/target/linux/generic/pending-4.9/411-mtd-partial_eraseblock_write.patch
index e925983b30..4e66272bb6 100644
--- a/target/linux/generic/pending-4.9/411-mtd-partial_eraseblock_write.patch
+++ b/target/linux/generic/pending-4.9/411-mtd-partial_eraseblock_write.patch
@@ -107,7 +107,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  		if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
  			instr->fail_addr -= part->offset;
-@@ -578,19 +647,22 @@ static struct mtd_part *allocate_partiti
+@@ -562,19 +631,22 @@ static struct mtd_part *allocate_partiti
  	remainder = do_div(tmp, wr_alignment);
  	if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
  		/* Doesn't start on a boundary of major erase size */
diff --git a/target/linux/generic/pending-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch b/target/linux/generic/pending-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
index d54c284c34..cbd185e0ae 100644
--- a/target/linux/generic/pending-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
+++ b/target/linux/generic/pending-4.9/431-mtd-bcm47xxpart-check-for-bad-blocks-when-calculatin.patch
@@ -6,7 +6,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 
 --- a/drivers/mtd/parsers/parser_trx.c
 +++ b/drivers/mtd/parsers/parser_trx.c
-@@ -29,6 +29,33 @@ struct trx_header {
+@@ -30,6 +30,33 @@ struct trx_header {
  	uint32_t offset[3];
  } __packed;
  
@@ -40,7 +40,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  static const char *parser_trx_data_part_name(struct mtd_info *master,
  					     size_t offset)
  {
-@@ -83,21 +110,21 @@ static int parser_trx_parse(struct mtd_i
+@@ -84,21 +111,21 @@ static int parser_trx_parse(struct mtd_i
  	if (trx.offset[2]) {
  		part = &parts[curr_part++];
  		part->name = "loader";
diff --git a/target/linux/generic/pending-4.9/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch b/target/linux/generic/pending-4.9/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch
index a6d0828b99..3970641555 100644
--- a/target/linux/generic/pending-4.9/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch
+++ b/target/linux/generic/pending-4.9/432-mtd-bcm47xxpart-detect-T_Meter-partition.patch
@@ -11,7 +11,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
 
 --- a/drivers/mtd/bcm47xxpart.c
 +++ b/drivers/mtd/bcm47xxpart.c
-@@ -39,6 +39,7 @@
+@@ -40,6 +40,7 @@
  #define NVRAM_HEADER			0x48534C46	/* FLSH */
  #define POT_MAGIC1			0x54544f50	/* POTT */
  #define POT_MAGIC2			0x504f		/* OP */
@@ -19,7 +19,7 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  #define ML_MAGIC1			0x39685a42
  #define ML_MAGIC2			0x26594131
  #define TRX_MAGIC			0x30524448
-@@ -182,6 +183,15 @@ static int bcm47xxpart_parse(struct mtd_
+@@ -183,6 +184,15 @@ static int bcm47xxpart_parse(struct mtd_
  					     MTD_WRITEABLE);
  			continue;
  		}