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kirkwood: find active Linksys root partition

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This is imported verbatim from the mvebu WRT1900AC port.

It picks up the current boot partition from the kernel command line,
then renames that partition "ubi" so that it auto-mounts.

Signed-off-by: Claudio Leite <leitec@staticky.com>

SVN-Revision: 47431
This commit is contained in:
Luka Perkov 2015-11-10 00:16:33 +00:00
parent ad8f6370de
commit 5d4bbb5f5b
4 changed files with 124 additions and 0 deletions
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1
target/linux/kirkwood/config-3.18
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@ -189,6 +189,7 @@ CONFIG_LZO_DECOMPRESS=y
CONFIG_MACH_KIRKWOOD=y
CONFIG_MACH_MVEBU_ANY=y
# CONFIG_MACH_NETXBIG is not set
CONFIG_MANGLE_BOOTARGS=y
CONFIG_MDIO_BOARDINFO=y
CONFIG_MIGHT_HAVE_PCI=y
CONFIG_MMC=y

1
target/linux/kirkwood/config-4.3
View File

@ -197,6 +197,7 @@ CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_MACH_KIRKWOOD=y
CONFIG_MACH_MVEBU_ANY=y
# CONFIG_MACH_NETXBIG is not set
CONFIG_MANGLE_BOOTARGS=y
CONFIG_MDIO_BOARDINFO=y
CONFIG_MIGHT_HAVE_PCI=y
CONFIG_MMC=y

61
target/linux/kirkwood/patches-3.18/100-find_active_root.patch Normal file
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@ -0,0 +1,61 @@
The WRT1900AC among other Linksys routers uses a dual-firmware layout.
Dynamically rename the active partition to "ubi".
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -25,12 +25,15 @@ static bool node_has_compatible(struct d
return of_get_property(pp, "compatible", NULL);
}
+static int mangled_rootblock;
+
static int parse_ofpart_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
struct mtd_part_parser_data *data)
{
struct device_node *node;
const char *partname;
+ const char *owrtpart = "ubi";
struct device_node *pp;
int nr_parts, i;
@@ -78,9 +81,15 @@ static int parse_ofpart_partitions(struc
(*pparts)[i].offset = of_read_number(reg, a_cells);
(*pparts)[i].size = of_read_number(reg + a_cells, s_cells);
- partname = of_get_property(pp, "label", &len);
- if (!partname)
- partname = of_get_property(pp, "name", &len);
+ if (mangled_rootblock && (i == mangled_rootblock)) {
+ partname = owrtpart;
+ } else {
+ partname = of_get_property(pp, "label", &len);
+
+ if (!partname)
+ partname = of_get_property(pp, "name", &len);
+ }
+
(*pparts)[i].name = partname;
if (of_get_property(pp, "read-only", &len))
@@ -178,6 +187,18 @@ static int __init ofpart_parser_init(voi
return 0;
}
+static int __init active_root(char *str)
+{
+ get_option(&str, &mangled_rootblock);
+
+ if (!mangled_rootblock)
+ return 1;
+
+ return 1;
+}
+
+__setup("mangled_rootblock=", active_root);
+
static void __exit ofpart_parser_exit(void)
{
deregister_mtd_parser(&ofpart_parser);

61
target/linux/kirkwood/patches-4.3/100-find_active_root.patch Normal file
View File

@ -0,0 +1,61 @@
The WRT1900AC among other Linksys routers uses a dual-firmware layout.
Dynamically rename the active partition to "ubi".
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -25,12 +25,15 @@ static bool node_has_compatible(struct d
return of_get_property(pp, "compatible", NULL);
}
+static int mangled_rootblock;
+
static int parse_ofpart_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
struct mtd_part_parser_data *data)
{
struct device_node *node;
const char *partname;
+ const char *owrtpart = "ubi";
struct device_node *pp;
int nr_parts, i;
@@ -78,9 +81,15 @@ static int parse_ofpart_partitions(struc
(*pparts)[i].offset = of_read_number(reg, a_cells);
(*pparts)[i].size = of_read_number(reg + a_cells, s_cells);
- partname = of_get_property(pp, "label", &len);
- if (!partname)
- partname = of_get_property(pp, "name", &len);
+ if (mangled_rootblock && (i == mangled_rootblock)) {
+ partname = owrtpart;
+ } else {
+ partname = of_get_property(pp, "label", &len);
+
+ if (!partname)
+ partname = of_get_property(pp, "name", &len);
+ }
+
(*pparts)[i].name = partname;
if (of_get_property(pp, "read-only", &len))
@@ -178,6 +187,18 @@ static int __init ofpart_parser_init(voi
return 0;
}
+static int __init active_root(char *str)
+{
+ get_option(&str, &mangled_rootblock);
+
+ if (!mangled_rootblock)
+ return 1;
+
+ return 1;
+}
+
+__setup("mangled_rootblock=", active_root);
+
static void __exit ofpart_parser_exit(void)
{
deregister_mtd_parser(&ofpart_parser);