[PATCH] NAND: Partition name support added to NAND subsystem

chpart, nboot and NAND subsystem related commands now accept also partition
name to specify offset.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 17 insertions, 12 deletions

diff --git a/doc/README.nand b/doc/README.nand
index 5279a4f..b5171f4 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -34,14 +34,19 @@ Commands:
    nand device num
       Make device `num' the current device and print information about it.
 
-   nand erase off size
-   nand erase clean [off size]
-      Erase `size' bytes starting at offset `off'.  Only complete erase
-      blocks can be erased.
+   nand erase off|partition size
+   nand erase clean [off|partition size]
+      Erase `size' bytes starting at offset `off'. Alternatively partition
+      name can be specified, in this case size will be eventually limited
+      to not exceed partition size (this behaviour applies also to read
+      and write commands). Only complete erase blocks can be erased.
+
+      If `erase' is specified without an offset or size, the entire flash
+      is erased. If `erase' is specified with partition but without an
+      size, the entire partition is erased.
 
       If `clean' is specified, a JFFS2-style clean marker is written to
-      each block after it is erased. If `clean' is specified without an
-      offset or size, the entire flash is erased.
+      each block after it is erased.
 
       This command will not erase blocks that are marked bad. There is
       a debug option in cmd_nand.c to allow bad blocks to be erased.
@@ -51,28 +56,28 @@ Commands:
    nand info
       Print information about all of the NAND devices found.
 
-   nand read addr ofs size
+   nand read addr ofs|partition size
       Read `size' bytes from `ofs' in NAND flash to `addr'. If a page
       cannot be read because it is marked bad or an uncorrectable data
       error is found the command stops with an error.
 
-   nand read.jffs2 addr ofs size
+   nand read.jffs2 addr ofs|partition size
       Like `read', but the data for blocks that are marked bad is read as
       0xff. This gives a readable JFFS2 image that can be processed by
       the JFFS2 commands such as ls and fsload.
 
-   nand read.oob addr ofs size
+   nand read.oob addr ofs|partition size
       Read `size' bytes from the out-of-band data area corresponding to
       `ofs' in NAND flash to `addr'. This is limited to the 16 bytes of
       data for one 512-byte page or 2 256-byte pages. There is no check
       for bad blocks or ECC errors.
 
-   nand write addr ofs size
+   nand write addr ofs|partition size
       Write `size' bytes from `addr' to `ofs' in NAND flash. If a page
       cannot be written because it is marked bad or the write fails the
       command stops with an error.
 
-   nand write.jffs2 addr ofs size
+   nand write.jffs2 addr ofs|partition size
       Like `write', but blocks that are marked bad are skipped and the
       is written to the next block instead. This allows writing writing
       a JFFS2 image, as long as the image is short enough to fit even
@@ -80,7 +85,7 @@ Commands:
       produced by mkfs.jffs2 should work well, but loading an image copied
       from another flash is going to be trouble if there are any bad blocks.
 
-   nand write.oob addr ofs size
+   nand write.oob addr ofs|partition size
       Write `size' bytes from `addr' to the out-of-band data area
       corresponding to `ofs' in NAND flash. This is limited to the 16 bytes
       of data for one 512-byte page or 2 256-byte pages. There is no check