Update CHANGELOG

[platform/kernel/u-boot.git] / README

diff --git a/README b/README
index 5c907c8..87d6d10 100644 (file)
--- a/README
+++ b/README
@@ -164,6 +164,7 @@ Directory Hierarchy:
 - lib_mips     Files generic to MIPS    architecture
 - lib_nios     Files generic to NIOS    architecture
 - lib_ppc      Files generic to PowerPC architecture
 - lib_mips     Files generic to MIPS    architecture
 - lib_nios     Files generic to NIOS    architecture
 - lib_ppc      Files generic to PowerPC architecture

+- libfdt       Library files to support flattened device trees

 - net          Networking code
 - post         Power On Self Test
 - rtc          Real Time Clock drivers
 - net          Networking code
 - post         Power On Self Test
 - rtc          Real Time Clock drivers


@@ -430,12 +431,23 @@ The following options need to be configured:
                expect it to be in bytes, others in MB.
                Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.
 
                expect it to be in bytes, others in MB.
                Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.
 

-               CONFIG_OF_FLAT_TREE
+               CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE

 
                New kernel versions are expecting firmware settings to be
 
                New kernel versions are expecting firmware settings to be

-               passed using flat open firmware trees.
-               The environment variable "disable_of", when set, disables this
-               functionality.
+               passed using flattened device trees (based on open firmware
+               concepts).
+
+               CONFIG_OF_LIBFDT
+                * New libfdt-based support
+                * Adds the "fdt" command
+                * The bootm command does _not_ modify the fdt
+
+               CONFIG_OF_FLAT_TREE
+                * Deprecated, see CONFIG_OF_LIBFDT
+                * Original ft_build.c-based support
+                * Automatically modifies the dft as part of the bootm command
+                * The environment variable "disable_of", when set,
+                    disables this functionality.

 
                CONFIG_OF_FLAT_TREE_MAX_SIZE
 
 
                CONFIG_OF_FLAT_TREE_MAX_SIZE
 


@@ -448,13 +460,16 @@ The following options need to be configured:
 
                CONFIG_OF_HAS_BD_T
 
 
                CONFIG_OF_HAS_BD_T
 

-               The resulting flat device tree will have a copy of the bd_t.
-               Space should be pre-allocated in the dts for the bd_t.
+                * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
+                * CONFIG_OF_FLAT_TREE - The resulting flat device tree
+                    will have a copy of the bd_t.  Space should be
+                    pre-allocated in the dts for the bd_t.

 
                CONFIG_OF_HAS_UBOOT_ENV
 
 
                CONFIG_OF_HAS_UBOOT_ENV
 

-               The resulting flat device tree will have a copy of u-boot's
-               environment variables
+                * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
+                * CONFIG_OF_FLAT_TREE - The resulting flat device tree
+                    will have a copy of u-boot's environment variables

 
                CONFIG_OF_BOARD_SETUP
 
 
                CONFIG_OF_BOARD_SETUP
 


@@ -721,6 +736,8 @@ The following options need to be configured:
 
                #define CONFIG_COMMANDS (CFG_CMD_ALL & ~CFG_CMD_NET)
 
 
                #define CONFIG_COMMANDS (CFG_CMD_ALL & ~CFG_CMD_NET)
 

+       Other Commands:
+               fdt (flattened device tree) command: CONFIG_OF_LIBFDT

 
        Note:   Don't enable the "icache" and "dcache" commands
                (configuration option CFG_CMD_CACHE) unless you know
 
        Note:   Don't enable the "icache" and "dcache" commands
                (configuration option CFG_CMD_CACHE) unless you know


@@ -1342,6 +1359,27 @@ The following options need to be configured:
 
                will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
 
 
                will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
 

+               CFG_SPD_BUS_NUM
+
+               If defined, then this indicates the I2C bus number for DDR SPD.
+               If not defined, then U-Boot assumes that SPD is on I2C bus 0.
+
+               CFG_RTC_BUS_NUM
+
+               If defined, then this indicates the I2C bus number for the RTC.
+               If not defined, then U-Boot assumes that RTC is on I2C bus 0.
+
+               CFG_DTT_BUS_NUM
+
+               If defined, then this indicates the I2C bus number for the DTT.
+               If not defined, then U-Boot assumes that DTT is on I2C bus 0.
+
+               CONFIG_FSL_I2C
+
+               Define this option if you want to use Freescale's I2C driver in
+               drivers/fsl_i2c.c.
+
+

 - SPI Support: CONFIG_SPI
 
                Enables SPI driver (so far only tested with
 - SPI Support: CONFIG_SPI
 
                Enables SPI driver (so far only tested with


@@ -1500,8 +1538,8 @@ The following options need to be configured:
 
                Enable auto completion of commands using TAB.
 
 
                Enable auto completion of commands using TAB.
 

-                Note that this feature has NOT been implemented yet
-                for the "hush" shell.
+               Note that this feature has NOT been implemented yet
+               for the "hush" shell.

 
 
                CFG_HUSH_PARSER
 
 
                CFG_HUSH_PARSER


@@ -3162,11 +3200,11 @@ loadaddr=200000
 oftaddr=0x300000
 => bootm $loadaddr - $oftaddr
 ## Booting image at 00200000 ...
 oftaddr=0x300000
 => bootm $loadaddr - $oftaddr
 ## Booting image at 00200000 ...

-   Image Name:   Linux-2.6.17-dirty
-   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
-   Data Size:    1029343 Bytes = 1005.2 kB
+   Image Name:  Linux-2.6.17-dirty
+   Image Type:  PowerPC Linux Kernel Image (gzip compressed)
+   Data Size:   1029343 Bytes = 1005.2 kB

    Load Address: 00000000
    Load Address: 00000000

-   Entry Point:  00000000
+   Entry Point:         00000000

    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
 Booting using flat device tree at 0x300000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
 Booting using flat device tree at 0x300000