kbuild: generate {spl, tpl}-autoconf.mk only when it is necessary

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 3c233db068c42e004c2350efecc40586ca149b8b..bfd89b0bfb091259f091db5ff68f3f8f0b2be63f 100644 (file)
--- a/README
+++ b/README
@@ -423,6 +423,11 @@ The following options need to be configured:
                CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT
                This value denotes start offset of DSP CCSR space.
 
+               CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
+               Single Source Clock is clocking mode present in some of FSL SoC's.
+               In this mode, a single differential clock is used to supply
+               clocks to the sysclock, ddrclock and usbclock.
+
 - Generic CPU options:
                CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
 
@@ -467,6 +472,21 @@ The following options need to be configured:
                Board config to use DDR3. It can be enabled for SoCs with
                Freescale DDR3 controllers.
 
+               CONFIG_SYS_FSL_IFC_BE
+               Defines the IFC controller register space as Big Endian
+
+               CONFIG_SYS_FSL_IFC_LE
+               Defines the IFC controller register space as Little Endian
+
+               CONFIG_SYS_FSL_PBL_PBI
+               It enables addition of RCW (Power on reset configuration) in built image.
+               Please refer doc/README.pblimage for more details
+
+               CONFIG_SYS_FSL_PBL_RCW
+               It adds PBI(pre-boot instructions) commands in u-boot build image.
+               PBI commands can be used to configure SoC before it starts the execution.
+               Please refer doc/README.pblimage for more details
+
 - Intel Monahans options:
                CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO
 
@@ -818,6 +838,22 @@ The following options need to be configured:
                as a convenience, when switching between booting from
                RAM and NFS.
 
+- Bootcount:
+               CONFIG_BOOTCOUNT_LIMIT
+               Implements a mechanism for detecting a repeating reboot
+               cycle, see:
+               http://www.denx.de/wiki/view/DULG/UBootBootCountLimit
+
+               CONFIG_BOOTCOUNT_ENV
+               If no softreset save registers are found on the hardware
+               "bootcount" is stored in the environment. To prevent a
+               saveenv on all reboots, the environment variable
+               "upgrade_available" is used. If "upgrade_available" is
+               0, "bootcount" is always 0, if "upgrade_available" is
+               1 "bootcount" is incremented in the environment.
+               So the Userspace Applikation must set the "upgrade_available"
+               and "bootcount" variable to 0, if a boot was successfully.
+
 - Pre-Boot Commands:
                CONFIG_PREBOOT
 
@@ -866,6 +902,7 @@ The following options need to be configured:
                CONFIG_CMD_BSP          * Board specific commands
                CONFIG_CMD_BOOTD          bootd
                CONFIG_CMD_CACHE        * icache, dcache
+               CONFIG_CMD_CLK          * clock command support
                CONFIG_CMD_CONSOLE        coninfo
                CONFIG_CMD_CRC32        * crc32
                CONFIG_CMD_DATE         * support for RTC, date/time...
@@ -886,6 +923,8 @@ The following options need to be configured:
                CONFIG_CMD_EXPORTENV    * export the environment
                CONFIG_CMD_EXT2         * ext2 command support
                CONFIG_CMD_EXT4         * ext4 command support
+               CONFIG_CMD_FS_GENERIC   * filesystem commands (e.g. load, ls)
+                                         that work for multiple fs types
                CONFIG_CMD_SAVEENV        saveenv
                CONFIG_CMD_FDC          * Floppy Disk Support
                CONFIG_CMD_FAT          * FAT command support
@@ -2735,6 +2774,12 @@ CBFS (Coreboot Filesystem) support
                Define this option to use the Bank addr/Extended addr
                support on SPI flashes which has size > 16Mbytes.
 
+               CONFIG_SF_DUAL_FLASH            Dual flash memories
+
+               Define this option to use dual flash support where two flash
+               memories can be connected with a given cs line.
+               currently Xilinx Zynq qspi support these type of connections.
+
 - SystemACE Support:
                CONFIG_SYSTEMACE
 
@@ -2805,7 +2850,7 @@ CBFS (Coreboot Filesystem) support
                CONFIG_RSA
 
                This enables the RSA algorithm used for FIT image verification
-               in U-Boot. See doc/uImage/signature for more information.
+               in U-Boot. See doc/uImage.FIT/signature.txt for more information.
 
                The signing part is build into mkimage regardless of this
                option.
@@ -3251,6 +3296,9 @@ FIT uImage format:
                Defines the size and behavior of the NAND that SPL uses
                to read U-Boot
 
+               CONFIG_SPL_NAND_BOOT
+               Add support NAND boot
+
                CONFIG_SYS_NAND_U_BOOT_OFFS
                Location in NAND to read U-Boot from
 
@@ -4394,6 +4442,9 @@ Low Level (hardware related) configuration options:
 
                NOTE : currently only supported on AM335x platforms.
 
+- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC:
+               Enables the RTC32K OSC on AM33xx based plattforms
+
 Freescale QE/FMAN Firmware Support:
 -----------------------------------
 
@@ -5233,6 +5284,15 @@ when your kernel is intended to use an initial ramdisk:
        Load Address: 0x00000000
        Entry Point:  0x00000000
 
+The "dumpimage" is a tool to disassemble images built by mkimage. Its "-i"
+option performs the converse operation of the mkimage's second form (the "-d"
+option). Given an image built by mkimage, the dumpimage extracts a "data file"
+from the image:
+
+       tools/dumpimage -i image -p position data_file
+         -i ==> extract from the 'image' a specific 'data_file', \
+          indexed by 'position'
+
 
 Installing a Linux Image:
 -------------------------