docs(linux): Kernel: Add UBIFS documentation

Santhosh Kumar K · cshilwant · commit 209c66e59bf9 · 2024-12-14T22:41:17.000+05:30
Add instructions to generate UBI image for OSPI/QSPI NOR/NAND
flashes.

Signed-off-by: Santhosh Kumar K &lt;s-k6@ti.com&gt;
diff --git a/configs/AM335X/AM335X_linux_toc.txt b/configs/AM335X/AM335X_linux_toc.txt
@@ -63,6 +63,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/MUSB
 linux/Foundational_Components_Kernel_Users_Guide
diff --git a/configs/AM437X/AM437X_linux_toc.txt b/configs/AM437X/AM437X_linux_toc.txt
@@ -65,6 +65,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/DWC3
 linux/Foundational_Components_Kernel_Users_Guide
diff --git a/configs/AM57X/AM57X_linux_toc.txt b/configs/AM57X/AM57X_linux_toc.txt
@@ -69,6 +69,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/SATA
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/DWC3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VPE
 linux/Foundational_Components_Kernel_Users_Guide
diff --git a/configs/AM62AX/AM62AX_linux_toc.txt b/configs/AM62AX/AM62AX_linux_toc.txt
@@ -74,6 +74,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/AM62_DWC3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components/Kernel/Kernel_Drivers/Watchdog
diff --git a/configs/AM62PX/AM62PX_linux_toc.txt b/configs/AM62PX/AM62PX_linux_toc.txt
@@ -77,6 +77,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/AM62_DWC3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components/Kernel/Kernel_Drivers/Watchdog
diff --git a/configs/AM62X/AM62X_linux_toc.txt b/configs/AM62X/AM62X_linux_toc.txt
@@ -76,6 +76,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/AM62_DWC3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components/Kernel/Kernel_Drivers/Watchdog
diff --git a/configs/AM64X/AM64X_linux_toc.txt b/configs/AM64X/AM64X_linux_toc.txt
@@ -65,6 +65,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components/Kernel/Kernel_Drivers/Watchdog
diff --git a/configs/AM65X/AM65X_linux_toc.txt b/configs/AM65X/AM65X_linux_toc.txt
@@ -62,6 +62,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/DWC3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/AM67/AM67_linux_toc.txt b/configs/AM67/AM67_linux_toc.txt
@@ -68,6 +68,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components_Kernel_Users_Guide
@@ -128,4 +129,3 @@ system/Demo_User_Guides/index_Demos
 system/Demo_User_Guides/TI_Apps_Launcher_User_Guide
 system/Demo_User_Guides/Seva_Store
 system/Demo_User_Guides/Chromium_Browser
-
diff --git a/configs/AM67A/AM67A_linux_toc.txt b/configs/AM67A/AM67A_linux_toc.txt
@@ -69,6 +69,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components_Kernel_Users_Guide
diff --git a/configs/AM68/AM68_linux_toc.txt b/configs/AM68/AM68_linux_toc.txt
@@ -72,6 +72,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/AM68A/AM68A_linux_toc.txt b/configs/AM68A/AM68A_linux_toc.txt
@@ -73,6 +73,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/AM69/AM69_linux_toc.txt b/configs/AM69/AM69_linux_toc.txt
@@ -72,6 +72,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/AM69A/AM69A_linux_toc.txt b/configs/AM69A/AM69A_linux_toc.txt
@@ -73,6 +73,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/DRA821A/DRA821A_linux_toc.txt b/configs/DRA821A/DRA821A_linux_toc.txt
@@ -58,6 +58,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components_Kernel_Users_Guide
 linux/Foundational_Components_Kernel_Release_Notes
diff --git a/configs/GEN/GEN_linux_toc.txt b/configs/GEN/GEN_linux_toc.txt
@@ -75,6 +75,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/SATA
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/MUSB
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/DWC3
diff --git a/configs/J7200/J7200_linux_toc.txt b/configs/J7200/J7200_linux_toc.txt
@@ -71,6 +71,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
 linux/Foundational_Components_Kernel_Users_Guide
diff --git a/configs/J721E/J721E_linux_toc.txt b/configs/J721E/J721E_linux_toc.txt
@@ -76,6 +76,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/J721S2/J721S2_linux_toc.txt b/configs/J721S2/J721S2_linux_toc.txt
@@ -75,6 +75,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/J722S/J722S_linux_toc.txt b/configs/J722S/J722S_linux_toc.txt
@@ -70,6 +70,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/PWM
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
@@ -130,4 +131,3 @@ system/Demo_User_Guides/index_Demos
 system/Demo_User_Guides/Chromium_Browser
 
 linux/Documentation_Tarball
-
diff --git a/configs/J742S2/J742S2_linux_toc.txt b/configs/J742S2/J742S2_linux_toc.txt
@@ -74,6 +74,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/J784S4/J784S4_linux_toc.txt b/configs/J784S4/J784S4_linux_toc.txt
@@ -74,6 +74,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/configs/TDA4VM/TDA4VM_linux_toc.txt b/configs/TDA4VM/TDA4VM_linux_toc.txt
@@ -77,6 +77,7 @@ linux/Foundational_Components/Kernel/Kernel_Drivers/SPI
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND
 linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/MMC-SD
 linux/Foundational_Components/Kernel/Kernel_Drivers/UART
+linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/UFS
 linux/Foundational_Components/Kernel/Kernel_Drivers/USB/CDNS3
 linux/Foundational_Components/Kernel/Kernel_Drivers/VTM
diff --git a/source/linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI.rst b/source/linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI.rst
@@ -420,11 +420,12 @@ or via command line arguments):
    $ dd if=/dev/mtd6 of=tmp_read.txt bs=num count=1 # read to num bytes to flash
    $ diff tmp_read.txt tmp_write.txt # should be NULL
 
-.. rubric:: Using UBIFS on flash
-   :name: using-ubifs-on-flash
+.. note::
+
+   Make sure UBIFS filesystem is enabled in the kernel (refer to `this
+   section <#enabling-qspi-driver-configurations>`__ for more information).
 
-Make sure UBIFS filesystem is enabled in the kernel (refer to `this
-section <#enabling-qspi-driver-configurations>`__ for more information).
+Refer :ref:`here <linux-ubifs>` for UBIFS.
 
 .. code-block:: console
 
diff --git a/source/linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND.rst b/source/linux/Foundational_Components/Kernel/Kernel_Drivers/Storage/NAND.rst
@@ -164,157 +164,7 @@ Information regarding NAND booting and booting the kernel and file
 system from NAND can be found in the U-boot User Guide NAND
 section.
 
-
-.. rubric:: **NAND Based File system**
-   :name: nand-based-file-system
-
-The bootloader and u-boot partitions don't use any filesystem. The
-images are flased directly to NAND flash.
-
-The Filesystem though uses UBIFS filesystem. NAND flash is prone to
-bit-flips. UBI + UBIFS takes care of the bit-flips issue and as well as
-many other things like wear leveling, bad-block management, etc.
-
-    .. rubric:: Required Software for UBI image creation
-       :name: required-software-ubifs
-
-    Building a UBI file system requires two applications, ubinize and
-    mkfs.ubifs. Both are both provided by mtd-utils package.
-    (sudo apt-get install mtd-utils).
-
-    .. rubric:: Building a UBI File system image
-       :name: building-ubi-file-system
-
-    When building a UBI file system you need to have a directory that
-    contains the exact files and directories layout that you plan to use for
-    your file system. This is similar to the files and directories layout
-    you will use to copy a file system onto a SD card for booting purposes.
-    It is important that your file system size is smaller than the file
-    system partition in the NAND.
-
-    Next you need a file named ubinize.cfg. Below contains the exact
-    contents of ubinize.cfg you should use. However, replace **<name>**
-    with a name of your choosing. e.g. rootfs
-
-    ubinize.cfg contents:
-
-    ::
-
-        [ubifs]
-         mode=ubi
-         image=<name>.ubifs
-         vol_id=0
-         vol_type=dynamic
-         vol_name=rootfs
-         vol_flags=autoresize
-
-    To build a UBI files system requires the below two commands. The
-    symbol **<directory path>** should be replaced with the path to
-    your directory that you want to include into a ubifs. The symbol
-    <name> should be replaced with the same value you used in creating
-    ubinize.cfg. Make sure you use the same value of <name> across the two
-    commands and ubinize.cfg. The symbols **<MKUBIFS ARGS>** and
-    **<UBINIZE ARGS>** are board specific. Replace these values with the
-    values seen in the below table based on the TI EVM you are using.
-
-    Commands to execute:
-
-    ::
-
-        ~# mkfs.ubifs -r <directory path> -o <name>.ubifs <MKUBIFS ARGS>
-        ~# ubinize -o <name>.ubi <UBINIZE ARGS> ubinize.cfg
-
-    Once these commands are executed <name>.ubi can then be flashed into
-    the NAND's file-system partition.
-
-    +-----------------+--------------------------------+-------------------------------------+
-    | Board Name      | MKUBIFS Args                   | UBINIZE Args                        |
-    +=================+================================+=====================================+
-    | AM335X GP EVM   | -F -m 2048 -e 126976 -c 5600   | -m 2048 -p 128KiB -s 512 -O 2048    |
-    +-----------------+--------------------------------+-------------------------------------+
-    | AM437x GP EVM   | -F -m 4096 -e 253952 -c 2650   | -m 4096 -p 256KiB -s 4096 -O 4096   |
-    +-----------------+--------------------------------+-------------------------------------+
-    | K2E EVM         | -F -m 2048 -e 126976 -c 3856   | -m 2048 -p 128KiB -s 2048 -O 2048   |
-    +-----------------+--------------------------------+-------------------------------------+
-    | K2L EVM         | -F -m 4096 -e 253952 -c 1926   | -m 4096 -p 256KiB -s 4096 -O 4096   |
-    +-----------------+--------------------------------+-------------------------------------+
-    | K2G EVM         | -F -m 4096 -e 253952 -c 1926   | -m 4096 -p 256KiB -s 4096 -O 4096   |
-    +-----------------+--------------------------------+-------------------------------------+
-    | DRA71x EVM      | -F -m 2048 -e 126976 -c 8192   | -m 2048 -p 128KiB -s 512 -O 2048    |
-    +-----------------+--------------------------------+-------------------------------------+
-    | AM64 GP EVM     | -F -m 4096 -e 258048 -c 3970   | -m 4096 -p 256KiB -s 1024 -O 1024   |
-    +-----------------+--------------------------------+-------------------------------------+
-    | AM62 LP SK      | -F -m 4096 -e 258048 -c 3970   | -m 4096 -p 256KiB -s 1024 -O 1024   |
-    +-----------------+--------------------------------+-------------------------------------+
-
-    Table:  Table of Parameters to use for Building UBI filesystem image
-
-    |
-
-    .. rubric:: Flashing the UBI File system image to NAND
-       :name: flashing-ubi-file-system
-
-    Copy the UBI image created above to the EVM via SD card or Network.
-    Use ubiformat from EVM Linux to flash the UBI filesystem to the NAND file-system
-    partition.
-
-    ::
-
-        ~# ubiformat -f rootfs.ubi /dev/mtd<X>
-
-    Alternatively, you can use u-boot to download and flash the UBI image
-    to the NAND flash over USB in DFU mode (Not Supported in AM64 in 8.2).
-
-    At EVM u-boot:
-
-    ::
-
-        => setenv dfu_alt_info ${dfu_alt_info_nand}
-        => dfu 0 nand list
-        DFU alt settings list:
-        dev: NAND alt: 0 name: NAND.tiboot3 layout: RAW_ADDR
-        dev: NAND alt: 1 name: NAND.tispl layout: RAW_ADDR
-        dev: NAND alt: 2 name: NAND.tiboot3.backup layout: RAW_ADDR
-        dev: NAND alt: 3 name: NAND.u-boot layout: RAW_ADDR
-        dev: NAND alt: 4 name: NAND.u-boot-env layout: RAW_ADDR
-        dev: NAND alt: 5 name: NAND.u-boot-env.backup layout: RAW_ADDR
-        dev: NAND alt: 6 name: NAND.file-system layout: RAW_ADDR
-
-        => dfu 0 nand 0
-
-    At Host PC:
-    Attach a micro-USB cable between the PC and the EVMs USB port.
-
-    ::
-
-        linux-pc$ sudo dfu-util -l
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=6, name="NAND.file-system", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=5, name="NAND.u-boot-env.backup", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=4, name="NAND.u-boot-env", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=3, name="NAND.u-boot", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=2, name="NAND.tiboot3.backup", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=1, name="NAND.tispl", serial="0000000000000280"
-        Found DFU: [0451:6165] ver=0224, devnum=7, cfg=1, intf=0, path="3-13.1", alt=0, name="NAND.tiboot3", serial="0000000000000280"
-
-        linux-pc$ sudo dfu-util -D rootfs.ubi -a NAND.file-system -v
-        Opening DFU capable USB device...
-        ID 0451:6165
-        Run-time device DFU version 0110
-        Claiming USB DFU Interface...
-        Setting Alternate Setting #6 ...
-        Determining device status: state = dfuIDLE, status = 0
-        dfuIDLE, continuing
-        DFU mode device DFU version 0110
-        Device returned transfer size 4096
-        Copying data from PC to DFU device
-        Download	[=                        ]   5%      4980736 bytes
-        Download	[=========================] 100%     90177536 bytes
-        Download done.
-        Sent a total of 90177536 bytes
-        state(7) = dfuMANIFEST, status(0) = No error condition is present
-        state(2) = dfuIDLE, status(0) = No error condition is present
-        Done!
-
+Refer :ref:`here <linux-ubifs>` for UBIFS.
 
 .. rubric:: **Board specific configurations**
    :name: board-specific-configurations
@@ -526,4 +376,3 @@ http://www.linux-mtd.infradead.org/doc/ubi.html
 http://www.linux-mtd.infradead.org/doc/ubifs.html
 https://wiki.linaro.org/Flash%20memory
 https://lwn.net/Articles/428584/
-
diff --git a/source/linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS.rst b/source/linux/Foundational_Components/Kernel/Kernel_Drivers/UBIFS.rst
diff --git a/source/linux/Foundational_Components_Kernel_Drivers.rst b/source/linux/Foundational_Components_Kernel_Drivers.rst
