ARM: davinci: remove hawkboard support

[karo-tx-uboot.git] / doc / README.nand

diff --git a/doc/README.nand b/doc/README.nand
index 70cf768d237056460e0bd1261a3bb0c980c4dc30..46d7edd179f139bb9688bfe1557bd5cbbcc53daf 100644 (file)
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -89,18 +89,16 @@ Commands:
 
 Configuration Options:
 
 
 Configuration Options:
 

+   CONFIG_SYS_NAND_U_BOOT_OFFS
+       NAND Offset from where SPL will read u-boot image. This is the starting
+       address of u-boot MTD partition in NAND.
+

    CONFIG_CMD_NAND
       Enables NAND support and commmands.
 
    CONFIG_CMD_NAND_TORTURE
       Enables the torture command (see description of this command below).
 
    CONFIG_CMD_NAND
       Enables NAND support and commmands.
 
    CONFIG_CMD_NAND_TORTURE
       Enables the torture command (see description of this command below).
 

-   CONFIG_MTD_NAND_ECC_JFFS2
-      Define this if you want the Error Correction Code information in
-      the out-of-band data to be formatted to match the JFFS2 file system.
-      CONFIG_MTD_NAND_ECC_YAFFS would be another useful choice for
-      someone to implement.
-

    CONFIG_SYS_MAX_NAND_DEVICE
       The maximum number of NAND devices you want to support.
 
    CONFIG_SYS_MAX_NAND_DEVICE
       The maximum number of NAND devices you want to support.
 


@@ -226,6 +224,14 @@ Platform specific options
        detection. However ECC calculation on such plaforms would still be
        done by GPMC controller.
 
        detection. However ECC calculation on such plaforms would still be
        done by GPMC controller.
 

+   CONFIG_SPL_NAND_AM33XX_BCH
+       Enables SPL-NAND driver (am335x_spl_bch.c) which supports ELM based
+        hardware ECC correction. This is useful for platforms which have ELM
+       hardware engine and use NAND boot mode.
+       Some legacy platforms like OMAP3xx do not have in-built ELM h/w engine,
+       so those platforms should use CONFIG_SPL_NAND_SIMPLE for enabling
+        SPL-NAND driver with software ECC correction support.
+

    CONFIG_NAND_OMAP_ECCSCHEME
        On OMAP platforms, this CONFIG specifies NAND ECC scheme.
        It can take following values:
    CONFIG_NAND_OMAP_ECCSCHEME
        On OMAP platforms, this CONFIG specifies NAND ECC scheme.
        It can take following values:


@@ -292,15 +298,14 @@ Platform specific options
                Thus BCH16 can be supported on 4K page NAND.
 
 
                Thus BCH16 can be supported on 4K page NAND.
 
 

+    CONFIG_NAND_OMAP_GPMC_PREFETCH
+       On OMAP platforms that use the GPMC controller
+       (CONFIG_NAND_OMAP_GPMC_PREFETCH), this options enables the code that
+       uses the prefetch mode to speed up read operations.
+

 NOTE:
 =====
 
 NOTE:
 =====
 

-The current NAND implementation is based on what is in recent
-Linux kernels.  The old legacy implementation has been removed.
-
-If you have board code which used CONFIG_NAND_LEGACY, you'll need
-to convert to the current NAND interface for it to continue to work.
-

 The Disk On Chip driver is currently broken and has been for some time.
 There is a driver in drivers/mtd/nand, taken from Linux, that works with
 the current NAND system but has not yet been adapted to the u-boot
 The Disk On Chip driver is currently broken and has been for some time.
 There is a driver in drivers/mtd/nand, taken from Linux, that works with
 the current NAND system but has not yet been adapted to the u-boot