Hello,
I am build a new Image for my TP-Link WR6400 V5.3, that device has already official firmware, but i modified my device, while i need more space.
Originally has my TP-Link a Windbond W25Q64 Flash with 8 Mbit, i changed to W25Q128 with 16 MBit Flash size, porting was easy, i cloned the flash content from the 8 Mbit Flash and Write it to the 16 Mbit.
i added my new device profile:
my new .dts:
&spi0 {
status = "okay";
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "boot";
reg = <0x0 0x20000>;
read-only;
};
partition@20000 {
compatible = "tplink,firmware";
label = "firmware";
reg = <0x20000 0xfa0000>;
};
partition@fc0000 {
label = "config";
reg = <0xfc0000 0x10000>;
read-only;
};
factory: partition@fd0000 {
label = "factory";
reg = <0xfd0000 0x30000>;
read-only;
};
};
};
};
my old dts:
&spi0 {
status = "okay";
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "boot";
reg = <0x0 0x20000>;
read-only;
};
partition@20000 {
compatible = "tplink,firmware";
label = "firmware";
reg = <0x20000 0x7a0000>;
};
partition@7c0000 {
label = "config";
reg = <0x7c0000 0x10000>;
read-only;
};
factory: partition@7d0000 {
label = "factory";
reg = <0x7d0000 0x30000>;
read-only;
};
};
};
};
new device config:
define Device/tplink_tl-mr6400-v5-16mb
$(Device/tplink-v2)
DEVICE_MODEL := TL-MR6400
TPLINK_FLASHLAYOUT := 16Mmtk
DEVICE_VARIANT := v5 16mb
TPLINK_HWID := 0x64000005
TPLINK_HWREV := 0x5
TPLINK_HWREVADD := 0x5
DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-ledtrig-usbport \
kmod-usb-serial-option kmod-usb-net-qmi-wwan uqmi
IMAGES := sysupgrade.bin tftp-recovery.bin
IMAGE/tftp-recovery.bin := pad-extra 128k | $$(IMAGE/factory.bin)
endef
TARGET_DEVICES += tplink_tl-mr6400-v5-16mb
device config:
My Partition Table 8 Mbit:
cat /proc/mtd:
dev: size erasesize name
mtd0: 00020000 00010000 "boot" => 128kbib
mtd1: 007a0000 00010000 "firmware" => 7808kib
mtd2: 0021b67c 00010000 "kernel" => 2157kib
mtd3: 00584984 00010000 "rootfs" => 5650kib
mtd4: 001e0000 00010000 "rootfs_data" => 1920kib
mtd5: 00010000 00010000 "config" => 1024kib
mtd6: 00030000 00010000 "factory" => 192kib
config:
define Device/tplink_tl-mr6400-v5
$(Device/tplink-v2)
IMAGE_SIZE := 7808k
DEVICE_MODEL := TL-MR6400
DEVICE_VARIANT := v5
TPLINK_FLASHLAYOUT := 8Mmtk
TPLINK_HWID := 0x64000005
TPLINK_HWREV := 0x5
TPLINK_HWREVADD := 0x5
DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-ledtrig-usbport \
kmod-usb-serial-option kmod-usb-net-qmi-wwan uqmi
IMAGES := sysupgrade.bin tftp-recovery.bin
IMAGE/tftp-recovery.bin := pad-extra 128k | $$(IMAGE/factory.bin)
endef
TARGET_DEVICES += tplink_tl-mr6400-v5
after flashing my new image,i got these errors from booting:
[ 0.368334] spi-mt7621 10000b00.spi: sys_freq: 193333333
[ 0.388062] spi-nor spi0.0: w25q128 (16384 Kbytes)
[ 0.392996] 4 fixed-partitions partitions found on MTD device spi0.0
[ 0.399555] OF: Bad cell count for /palmbus@10000000/spi@b00/flash@0/partitions
[ 0.407025] OF: Bad cell count for /palmbus@10000000/spi@b00/flash@0/partitions
[ 0.414891] OF: Bad cell count for /palmbus@10000000/spi@b00/flash@0/partitions
[ 0.422332] OF: Bad cell count for /palmbus@10000000/spi@b00/flash@0/partitions
[ 0.430362] Creating 4 MTD partitions on "spi0.0":
[ 0.435310] 0x000000000000-0x000000020000 : "boot"
[ 0.444206] 0x000000020000-0x000000ff0000 : "firmware"
[ 0.451281] 2 tplink-fw partitions found on MTD device firmware
[ 0.457392] Creating 2 MTD partitions on "firmware":
[ 0.462446] 0x000000000000-0x000000222a59 : "kernel"
[ 0.467493] mtd: partition "kernel" doesn't end on an erase/write block -- force read-only
[ 0.478920] 0x000000222a5c-0x000000fd0000 : "rootfs"
[ 0.483974] mtd: partition "rootfs" doesn't start on an erase/write block boundary -- force read-only
[ 0.494511] mtd: setting mtd3 (rootfs) as root device
[ 0.500837] 1 squashfs-split partitions found on MTD device rootfs
[ 0.507203] 0x000000890000-0x000000fd0000 : "rootfs_data"
[ 0.513939] 0x0000007c0000-0x0000007d0000 : "config"
[ 0.522129] 0x0000007d0000-0x000000800000 : "factory"
[ 0.583314] rt3050-esw 10110000.esw: mediatek esw at 0xb0110000, irq 25 initialized
[ 0.592004] mtk_soc_eth 10100000.ethernet eth0: mediatek frame engine at 0xb0100000, irq 5
[ 0.602272] NET: Registered protocol family 10
[ 0.612519] Segment Routing with IPv6
[ 0.616469] NET: Registered protocol family 17
[ 0.621067] 8021q: 802.1Q VLAN Support v1.8
[ 0.632610] unable to read id index table
[ 0.637109] Flash size not aligned to erasesize, reducing to 13952KiB
[ 15.830805] VFS: Cannot open root device "(null)" or unknown-block(31,3): error -5
[ 15.838504] Please append a correct "root=" boot option; here are the available partitions:
[ 15.846987] 1f00 128 mtdblock0
[ 15.846991] (driver?)
[ 15.853617] 1f01 16192 mtdblock1
[ 15.853620] (driver?)
[ 15.860253] 1f02 2186 mtdblock2
[ 15.860257] (driver?)
[ 15.866889] 1f03 14005 mtdblock3
[ 15.866893] (driver?)
[ 15.873517] 1f04 7424 mtdblock4
[ 15.873520] (driver?)
[ 15.880152] 1f05 64 mtdblock5
[ 15.880155] (driver?)
[ 15.886788] 1f06 192 mtdblock6
[ 15.886791] (driver?)
[ 15.893414] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3)
[ 15.901883] Rebooting in 1 seconds..
What are wrong with my partition files?
"Flash size not aligned to erasesize, reducing to 13952KiB" why?
i modified the mktplinkfw2 program, and added a modified layout:
{
.id = "16Mmtk",
.fw_max_len = 0xfa0000,
.kernel_la = 0x80000000,
.kernel_ep = 0x80000000,
.rootfs_ofs = 0x140000,
}
the program had only "8Mmtk", the others "16Mltq, 16Mqca" not worked, the router is bricked.
can any one help me? 
thank you!