imx: ventana: make model env var automatic and non-overridable

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 09a1cba50d2958f629869468c7a0d1b47385e75f..ace6d76d06c3547db2aaf1cd6d7d8295024863e2 100644 (file)
--- a/README
+++ b/README
@@ -690,6 +690,14 @@ The following options need to be configured:
                exists, unlike the similar options in the Linux kernel. Do not
                set these options unless they apply!
 
                exists, unlike the similar options in the Linux kernel. Do not
                set these options unless they apply!
 

+               COUNTER_FREQUENCY
+               Generic timer clock source frequency.
+
+               COUNTER_FREQUENCY_REAL
+               Generic timer clock source frequency if the real clock is
+               different from COUNTER_FREQUENCY, and can only be determined
+               at run time.
+

                NOTE: The following can be machine specific errata. These
                do have ability to provide rudimentary version and machine
                specific checks, but expect no product checks.
                NOTE: The following can be machine specific errata. These
                do have ability to provide rudimentary version and machine
                specific checks, but expect no product checks.


@@ -1050,6 +1058,9 @@ The following options need to be configured:
                bytes are output before the console is initialised, the
                earlier bytes are discarded.
 
                bytes are output before the console is initialised, the
                earlier bytes are discarded.
 

+               Note that when printing the buffer a copy is made on the
+               stack so CONFIG_PRE_CON_BUF_SZ must fit on the stack.
+

                'Sane' compilers will generate smaller code if
                CONFIG_PRE_CON_BUF_SZ is a power of 2
 
                'Sane' compilers will generate smaller code if
                CONFIG_PRE_CON_BUF_SZ is a power of 2
 


@@ -1975,12 +1986,6 @@ CBFS (Coreboot Filesystem) support
                boot.  See the documentation file README.video for a
                description of this variable.
 
                boot.  See the documentation file README.video for a
                description of this variable.
 

-               CONFIG_VIDEO_VGA
-
-               Enable the VGA video / BIOS for x86. The alternative if you
-               are using coreboot is to use the coreboot frame buffer
-               driver.
-

 
 - Keyboard Support:
                CONFIG_KEYBOARD
 
 - Keyboard Support:
                CONFIG_KEYBOARD


@@ -2215,18 +2220,6 @@ CBFS (Coreboot Filesystem) support
                Some PHY like Intel LXT971A need extra delay after
                command issued before MII status register can be read
 
                Some PHY like Intel LXT971A need extra delay after
                command issued before MII status register can be read
 

-- Ethernet address:
-               CONFIG_ETHADDR
-               CONFIG_ETH1ADDR
-               CONFIG_ETH2ADDR
-               CONFIG_ETH3ADDR
-               CONFIG_ETH4ADDR
-               CONFIG_ETH5ADDR
-
-               Define a default value for Ethernet address to use
-               for the respective Ethernet interface, in case this
-               is not determined automatically.
-

 - IP address:
                CONFIG_IPADDR
 
 - IP address:
                CONFIG_IPADDR
 


@@ -2516,6 +2509,8 @@ CBFS (Coreboot Filesystem) support
                  - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE
                If those defines are not set, default value is 100000
                for speed, and 0 for slave.
                  - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE
                If those defines are not set, default value is 100000
                for speed, and 0 for slave.

+                 - enable bus 3 with CONFIG_SYS_I2C_MXC_I2C3
+                 - enable bus 4 with CONFIG_SYS_I2C_MXC_I2C4

 
                - drivers/i2c/rcar_i2c.c:
                  - activate this driver with CONFIG_SYS_I2C_RCAR
 
                - drivers/i2c/rcar_i2c.c:
                  - activate this driver with CONFIG_SYS_I2C_RCAR


@@ -2990,8 +2985,8 @@ CBFS (Coreboot Filesystem) support
                completely disabled. Anybody can change or delete
                these parameters.
 
                completely disabled. Anybody can change or delete
                these parameters.
 

-               Alternatively, if you #define _both_ CONFIG_ETHADDR
-               _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default
+               Alternatively, if you define _both_ an ethaddr in the
+               default env _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default

                Ethernet address is installed in the environment,
                which can be changed exactly ONCE by the user. [The
                serial# is unaffected by this, i. e. it remains
                Ethernet address is installed in the environment,
                which can be changed exactly ONCE by the user. [The
                serial# is unaffected by this, i. e. it remains


@@ -4268,6 +4263,10 @@ Configuration Settings:
                list, simply add an entry for the same variable name to the
                ".flags" variable.
 
                list, simply add an entry for the same variable name to the
                ".flags" variable.
 

+       If CONFIG_REGEX is defined, the variable_name above is evaluated as a
+       regular expression. This allows multiple variables to define the same
+       flags without explicitly listing them for each variable.
+

 - CONFIG_ENV_ACCESS_IGNORE_FORCE
        If defined, don't allow the -f switch to env set override variable
        access flags.
 - CONFIG_ENV_ACCESS_IGNORE_FORCE
        If defined, don't allow the -f switch to env set override variable
        access flags.


@@ -4992,6 +4991,9 @@ Low Level (hardware related) configuration options:
 - CONFIG_FSL_DDR_SYNC_REFRESH
                Enable sync of refresh for multiple controllers.
 
 - CONFIG_FSL_DDR_SYNC_REFRESH
                Enable sync of refresh for multiple controllers.
 

+- CONFIG_FSL_DDR_BIST
+               Enable built-in memory test for Freescale DDR controllers.
+

 - CONFIG_SYS_83XX_DDR_USES_CS0
                Only for 83xx systems. If specified, then DDR should
                be configured using CS0 and CS1 instead of CS2 and CS3.
 - CONFIG_SYS_83XX_DDR_USES_CS0
                Only for 83xx systems. If specified, then DDR should
                be configured using CS0 and CS1 instead of CS2 and CS3.


@@ -5587,7 +5589,7 @@ loaded to, and "Flash Location" gives the image's address in NOR
 flash or offset in NAND flash.
 
 *Note* - these variables don't have to be defined for all boards, some
 flash or offset in NAND flash.
 
 *Note* - these variables don't have to be defined for all boards, some

-boards currenlty use other variables for these purposes, and some
+boards currently use other variables for these purposes, and some

 boards use these variables for other purposes.
 
 Image              File Name        RAM Address       Flash Location
 boards use these variables for other purposes.
 
 Image              File Name        RAM Address       Flash Location


@@ -5663,6 +5665,10 @@ override any association in the static list. You can define
 CONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the
 ".callbacks" environment variable in the default or embedded environment.
 
 CONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the
 ".callbacks" environment variable in the default or embedded environment.
 

+If CONFIG_REGEX is defined, the variable_name above is evaluated as a
+regular expression. This allows multiple variables to be connected to
+the same callback without explicitly listing them all out.
+

 
 Command Line Parsing:
 =====================
 
 Command Line Parsing:
 =====================


@@ -5737,7 +5743,8 @@ o If both the SROM and the environment contain a MAC address, and the
   warning is printed.
 
 o If neither SROM nor the environment contain a MAC address, an error
   warning is printed.
 
 o If neither SROM nor the environment contain a MAC address, an error

-  is raised.
+  is raised. If CONFIG_NET_RANDOM_ETHADDR is defined, then in this case
+  a random, locally-assigned MAC is used.

 
 If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses
 will be programmed into hardware as part of the initialization process.         This
 
 If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses
 will be programmed into hardware as part of the initialization process.         This