karo: tx6: cleanup DDR calibration code

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

diff --git a/doc/README.nand b/doc/README.nand
index 70cf768d237056460e0bd1261a3bb0c980c4dc30..dee0e00a61708825f347104a4acf9a8d4de9bb9c 100644 (file)
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -89,6 +89,10 @@ 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
       Enables NAND support and commmands.
 


@@ -226,6 +230,14 @@ 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:


@@ -292,6 +304,11 @@ 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:
 =====