X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=doc%2FREADME.ext4;h=8ecd21eee3bc951508bfbec35807592dc9796fe8;hb=42c8a112d2e90598f0933d085ab4e47b41ab2aba;hp=b3ea8b776d4a5ddd19e7fd4d3b11a14e69d86150;hpb=ed34f34dbaf206dfe223f4bc2147d600fe1b0f58;p=oweals%2Fu-boot.git

diff --git a/doc/README.ext4 b/doc/README.ext4
index b3ea8b776d..8ecd21eee3 100644
--- a/doc/README.ext4
+++ b/doc/README.ext4
@@ -1,44 +1,81 @@
-This patch series adds support for ext4 ls,load and write features in uboot
-Journaling is supported for write feature.
-
-To Enable ext2 ls and load commands, modify the board specific config file with
-#define CONFIG_CMD_EXT2
-
-To Enable ext4 ls and load commands, modify the board specific config file with
-#define CONFIG_CMD_EXT4
-
-To enable ext4 write command, modify the board specific config file with
-#define CONFIG_CMD_EXT4
-#define CONFIG_CMD_EXT4_WRITE
-
-Steps to test:
-
-1. After applying the patch, ext4 specific commands can be seen
-   in the boot loader prompt using
-        UBOOT #help
-
-        ext4load- load binary file from a Ext4 file system
-        ext4ls  - list files in a directory (default /)
-        ext4write- create a file in ext4 formatted partition
-
-2. To list the files in ext4 formatted partition, execute
-        ext4ls <interface> <dev[:part]> [directory]
-        For example:
-        UBOOT #ext4ls mmc 0:5 /usr/lib
-
-3. To read and load a file from an ext4 formatted partition to RAM, execute
-        ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
-        For example:
-        UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
-
-4. To write a file to a ext4 formatted partition.
-        a) First load a file to RAM at a particular address for example 0x30007fc0.
-        Now execute ext4write command
-        ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
-        For example:
-        UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
-        (here 6183120 is the size of the file to be written)
-        Note: Absolute path is required for the file to be written
+U-Boot supports access of both ext2 and ext4 filesystems, either in read-only
+mode or in read-write mode.
+
+First, to enable support for both ext4 (and, automatically, ext2 as well),
+but without selecting the corresponding commands, enable one of the following:
+
+  CONFIG_FS_EXT4	(for read-only)
+  CONFIG_EXT4_WRITE	(for read-write)
+
+Next, to select the ext2-related commands:
+
+  * ext2ls
+  * ext2load
+
+or ext4-related commands:
+
+  * ext4size
+  * ext4ls
+  * ext4load
+
+use one or both of:
+
+  CONFIG_CMD_EXT2
+  CONFIG_CMD_EXT4
+
+Selecting either of the above automatically selects CONFIG_FS_EXT4 if it
+wasn't enabled already.
+
+In addition, to get the write access command "ext4write", enable:
+
+  CONFIG_CMD_EXT4_WRITE
+
+which automatically selects CONFIG_EXT4_WRITE if it wasn't defined
+already.
+
+Also relevant are the generic filesystem commands, selected by:
+
+  CONFIG_CMD_FS_GENERIC
+
+This does not automatically enable EXT4 support for you, you still need
+to do that yourself.
+
+Some sample commands to test ext4 support:
+
+1. Check that the commands can be seen in the output of U-Boot help:
+
+	UBOOT #help
+	...
+	ext4load- load binary file from a Ext4 file system
+	ext4ls  - list files in a directory (default /)
+	ext4size - determine a file's size
+	ext4write- create a file in ext4 formatted partition
+	...
+
+2. To list the files in an ext4-formatted partition, run:
+
+	ext4ls <interface> <dev[:part]> [directory]
+
+	For example:
+	UBOOT #ext4ls mmc 0:5 /usr/lib
+
+3. To read and load a file from an ext4-formatted partition to RAM, run:
+
+	ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
+
+	For example:
+	UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
+
+4. To write a file to an ext4-formatted partition.
+
+	a) First load a file to RAM at a particular address for example 0x30007fc0.
+	Now execute ext4write command:
+	ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
+
+	For example:
+	UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
+	(here 6183120 is the size of the file to be written)
+	Note: Absolute path is required for the file to be written
 
 References :
 	-- ext4 implementation in Linux Kernel