ARM: dts: i.MX6QDL: icore-rqs: Fix eMMC detection during SPL

[people/ms/u-boot.git] / doc / README.nand

diff --git a/doc/README.nand b/doc/README.nand
index 96ffc489408853729292bb1818e4af2c355c9df5..362b8d8c9f4d08c89c4ddfd5a394642a918e0666 100644 (file)
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -137,7 +137,7 @@ Configuration Options:
       init:
 
        /* chip is struct nand_chip, and is now provided by the driver. */
-       mtd = &chip.mtd;
+       mtd = nand_to_mtd(&chip);
 
        /*
         * Fill in appropriate values if this driver uses these fields,
@@ -160,7 +160,7 @@ Configuration Options:
 
        /*
         * devnum is the device number to be used in nand commands
-        * and in mtd->name.  Must be less than CONFIG_SYS_NAND_MAX_DEVICE.
+        * and in mtd->name.  Must be less than CONFIG_SYS_MAX_NAND_DEVICE.
         */
        if (nand_register(devnum, mtd))
                error out
@@ -180,12 +180,6 @@ Configuration Options:
        And fetching device parameters flashed on device, by parsing
        ONFI parameter page.
 
-   CONFIG_BCH
-       Enables software based BCH ECC algorithm present in lib/bch.c
-       This is used by SoC platforms which do not have built-in ELM
-       hardware engine required for BCH ECC correction.
-
-
 Platform specific options
 =========================
    CONFIG_NAND_OMAP_GPMC
@@ -271,7 +265,7 @@ Platform specific options
 
                However, for 4K pagesize NAND
                NAND_PAGESIZE = 4096
-               NAND_OOBSIZE = 64
+               NAND_OOBSIZE = 224
                ECC_BYTES = 26
                2 + (4096 / 512) * 26 = 210 < NAND_OOBSIZE
                Thus BCH16 can be supported on 4K page NAND.
@@ -307,7 +301,7 @@ Miscellaneous and testing commands:
   DANGEROUS!!! Factory set bad blocks will be lost. Use only
   to remove artificial bad blocks created with the "markbad" command.
 
-  "torture offset"
+  "torture offset [size]"
   Torture block to determine if it is still reliable.
   Enabled by the CONFIG_CMD_NAND_TORTURE configuration option.
   This command returns 0 if the block is still reliable, else 1.
@@ -324,6 +318,10 @@ Miscellaneous and testing commands:
   automate actions following a nand->write() error. This would e.g. be required
   in order to program or update safely firmware to NAND, especially for the UBI
   part of such firmware.
+  Optionally, a second parameter size can be given to test multiple blocks with
+  one call. If size is not a multiple of the NAND's erase size, then the block
+  that contains offset + size will be tested in full. If used with size, this
+  command returns 0 if all tested blocks have been found reliable, else 1.
 
 
 NAND locking command (for chips with active LOCKPRE pin)