board: sama5d2_ptc_ek: add pda detect call at init time

[oweals/u-boot.git] / README

diff --git a/README b/README
index af7fbb6561ba5062b4662fc3145945599db664aa..f7ed7eaae16c8460625a6b38727dfab3db7fdb9e 100644 (file)
--- a/README
+++ b/README
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+

 #
 # (C) Copyright 2000 - 2013
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
 # (C) Copyright 2000 - 2013
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.

-#
-# SPDX-License-Identifier:     GPL-2.0+
-#

 
 Summary:
 ========
 
 Summary:
 ========


@@ -333,11 +331,6 @@ The following options need to be configured:
 
 - Board Type:  Define exactly one, e.g. CONFIG_MPC8540ADS.
 
 
 - Board Type:  Define exactly one, e.g. CONFIG_MPC8540ADS.
 

-- Marvell Family Member
-               CONFIG_SYS_MVFS         - define it if you want to enable
-                                         multiple fs option at one time
-                                         for marvell soc family
-

 - 85xx CPU Options:
                CONFIG_SYS_PPC64
 
 - 85xx CPU Options:
                CONFIG_SYS_PPC64
 


@@ -535,25 +528,6 @@ The following options need to be configured:
                pointer. This is needed for the temporary stack before
                relocation.
 
                pointer. This is needed for the temporary stack before
                relocation.
 

-               CONFIG_SYS_MIPS_CACHE_MODE
-
-               Cache operation mode for the MIPS CPU.
-               See also arch/mips/include/asm/mipsregs.h.
-               Possible values are:
-                       CONF_CM_CACHABLE_NO_WA
-                       CONF_CM_CACHABLE_WA
-                       CONF_CM_UNCACHED
-                       CONF_CM_CACHABLE_NONCOHERENT
-                       CONF_CM_CACHABLE_CE
-                       CONF_CM_CACHABLE_COW
-                       CONF_CM_CACHABLE_CUW
-                       CONF_CM_CACHABLE_ACCELERATED
-
-               CONFIG_SYS_XWAY_EBU_BOOTCFG
-
-               Special option for Lantiq XWAY SoCs for booting from NOR flash.
-               See also arch/mips/cpu/mips32/start.S.
-

                CONFIG_XWAY_SWAP_BYTES
 
                Enable compilation of tools/xway-swap-bytes needed for Lantiq
                CONFIG_XWAY_SWAP_BYTES
 
                Enable compilation of tools/xway-swap-bytes needed for Lantiq


@@ -812,14 +786,6 @@ The following options need to be configured:
                CONFIG_AT91_HW_WDT_TIMEOUT
                specify the timeout in seconds. default 2 seconds.
 
                CONFIG_AT91_HW_WDT_TIMEOUT
                specify the timeout in seconds. default 2 seconds.
 

-- U-Boot Version:
-               CONFIG_VERSION_VARIABLE
-               If this variable is defined, an environment variable
-               named "ver" is created by U-Boot showing the U-Boot
-               version as printed by the "version" command.
-               Any change to this variable will be reverted at the
-               next reset.
-

 - Real-Time Clock:
 
                When CONFIG_CMD_DATE is selected, the type of the RTC
 - Real-Time Clock:
 
                When CONFIG_CMD_DATE is selected, the type of the RTC


@@ -889,9 +855,6 @@ The following options need to be configured:
                CONFIG_EFI_PARTITION   GPT partition table, common when EFI is the
                                       bootloader.  Note 2TB partition limit; see
                                       disk/part_efi.c
                CONFIG_EFI_PARTITION   GPT partition table, common when EFI is the
                                       bootloader.  Note 2TB partition limit; see
                                       disk/part_efi.c

-               CONFIG_MTD_PARTITIONS  Memory Technology Device partition table.
-
-               If IDE or SCSI support is enabled (CONFIG_IDE or

                CONFIG_SCSI) you must configure support for at
                least one non-MTD partition type as well.
 
                CONFIG_SCSI) you must configure support for at
                least one non-MTD partition type as well.
 


@@ -995,9 +958,6 @@ The following options need to be configured:
                        Define this to use i/o functions instead of macros
                        (some hardware wont work with macros)
 
                        Define this to use i/o functions instead of macros
                        (some hardware wont work with macros)
 

-               CONFIG_DRIVER_TI_EMAC
-               Support for davinci emac
-

                        CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT
                        Define this if you have more then 3 PHYs.
 
                        CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT
                        Define this if you have more then 3 PHYs.
 


@@ -1182,10 +1142,6 @@ The following options need to be configured:
                CONFIG_SUPPORT_EMMC_BOOT
                Enable some additional features of the eMMC boot partitions.
 
                CONFIG_SUPPORT_EMMC_BOOT
                Enable some additional features of the eMMC boot partitions.
 

-               CONFIG_SUPPORT_EMMC_RPMB
-               Enable the commands for reading, writing and programming the
-               key for the Replay Protection Memory Block partition in eMMC.
-

 - USB Device Firmware Update (DFU) class support:
                CONFIG_DFU_OVER_USB
                This enables the USB portion of the DFU USB class
 - USB Device Firmware Update (DFU) class support:
                CONFIG_DFU_OVER_USB
                This enables the USB portion of the DFU USB class


@@ -2213,12 +2169,6 @@ The following options need to be configured:
                the environment like the "source" command or the
                boot command first.
 
                the environment like the "source" command or the
                boot command first.
 

-               CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
-
-               Define this in order to add variables describing certain
-               run-time determined information about the hardware to the
-               environment.  These will be named board_name, board_rev.
-

                CONFIG_DELAY_ENVIRONMENT
 
                Normally the environment is loaded when the board is
                CONFIG_DELAY_ENVIRONMENT
 
                Normally the environment is loaded when the board is


@@ -2427,19 +2377,6 @@ FIT uImage format:
  -150  common/cmd_nand.c       Incorrect FIT image format
   151  common/cmd_nand.c       FIT image format OK
 
  -150  common/cmd_nand.c       Incorrect FIT image format
   151  common/cmd_nand.c       FIT image format OK
 

-- legacy image format:
-               CONFIG_IMAGE_FORMAT_LEGACY
-               enables the legacy image format support in U-Boot.
-
-               Default:
-               enabled if CONFIG_FIT_SIGNATURE is not defined.
-
-               CONFIG_DISABLE_IMAGE_LEGACY
-               disable the legacy image format
-
-               This define is introduced, as the legacy image format is
-               enabled per default for backward compatibility.
-

 - Standalone program support:
                CONFIG_STANDALONE_LOAD_ADDR
 
 - Standalone program support:
                CONFIG_STANDALONE_LOAD_ADDR
 


@@ -2471,23 +2408,6 @@ FIT uImage format:
                for a more detailed description refer to doc/README.update.
 
 - MTD Support (mtdparts command, UBI support)
                for a more detailed description refer to doc/README.update.
 
 - MTD Support (mtdparts command, UBI support)

-               CONFIG_MTD_DEVICE
-
-               Adds the MTD device infrastructure from the Linux kernel.
-               Needed for mtdparts command support.
-
-               CONFIG_MTD_PARTITIONS
-
-               Adds the MTD partitioning infrastructure from the Linux
-               kernel. Needed for UBI support.
-
-- UBI support
-               CONFIG_UBI_SILENCE_MSG
-
-               Make the verbose messages from UBI stop printing.  This leaves
-               warnings and errors enabled.
-
-

                CONFIG_MTD_UBI_WL_THRESHOLD
                This parameter defines the maximum difference between the highest
                erase counter value and the lowest erase counter value of eraseblocks
                CONFIG_MTD_UBI_WL_THRESHOLD
                This parameter defines the maximum difference between the highest
                erase counter value and the lowest erase counter value of eraseblocks


@@ -2669,6 +2589,10 @@ FIT uImage format:
                CONFIG_SPL_NAND_DRIVERS
                SPL uses normal NAND drivers, not minimal drivers.
 
                CONFIG_SPL_NAND_DRIVERS
                SPL uses normal NAND drivers, not minimal drivers.
 

+               CONFIG_SPL_NAND_IDENT
+               SPL uses the chip ID list to identify the NAND flash.
+               Requires CONFIG_SPL_NAND_BASE.
+

                CONFIG_SPL_NAND_ECC
                Include standard software ECC in the SPL
 
                CONFIG_SPL_NAND_ECC
                Include standard software ECC in the SPL
 


@@ -2730,7 +2654,7 @@ FIT uImage format:
                use an arch-specific makefile fragment instead, for
                example if more than one image needs to be produced.
 
                use an arch-specific makefile fragment instead, for
                example if more than one image needs to be produced.
 

-               CONFIG_FIT_SPL_PRINT
+               CONFIG_SPL_FIT_PRINT

                Printing information about a FIT image adds quite a bit of
                code to SPL. So this is normally disabled in SPL. Use this
                option to re-enable it. This will affect the output of the
                Printing information about a FIT image adds quite a bit of
                code to SPL. So this is normally disabled in SPL. Use this
                option to re-enable it. This will affect the output of the


@@ -2808,9 +2732,6 @@ Configuration Settings:
                Begin and End addresses of the area used by the
                simple memory test.
 
                Begin and End addresses of the area used by the
                simple memory test.
 

-- CONFIG_SYS_ALT_MEMTEST:
-               Enable an alternate, more extensive memory test.
-

 - CONFIG_SYS_MEMTEST_SCRATCH:
                Scratch address used by the alternate memory test
                You only need to set this if address zero isn't writeable
 - CONFIG_SYS_MEMTEST_SCRATCH:
                Scratch address used by the alternate memory test
                You only need to set this if address zero isn't writeable


@@ -3075,11 +2996,6 @@ Configuration Settings:
        If defined, don't allow the -f switch to env set override variable
        access flags.
 
        If defined, don't allow the -f switch to env set override variable
        access flags.
 

-- CONFIG_USE_STDINT
-       If stdint.h is available with your toolchain you can define this
-       option to enable it. You can provide option 'USE_STDINT=1' when
-       building U-Boot to enable this.
-

 The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
 following configurations:
 The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
 following configurations:


@@ -3436,9 +3352,6 @@ Low Level (hardware related) configuration options:
                If defined, the x86 reset vector code is included. This is not
                needed when U-Boot is running from Coreboot.
 
                If defined, the x86 reset vector code is included. This is not
                needed when U-Boot is running from Coreboot.
 

-- CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC:
-               Enables the RTC32K OSC on AM33xx based plattforms
-

 - CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
                Option to disable subpage write in NAND driver
                driver that uses this:
 - CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
                Option to disable subpage write in NAND driver
                driver that uses this:


@@ -4003,6 +3916,17 @@ 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.
 
 regular expression. This allows multiple variables to be connected to
 the same callback without explicitly listing them all out.
 

+The signature of the callback functions is:
+
+    int callback(const char *name, const char *value, enum env_op op, int flags)
+
+* name - changed environment variable
+* value - new value of the environment variable
+* op - operation (create, overwrite, or delete)
+* flags - attributes of the environment variable change, see flags H_* in
+  include/search.h
+
+The return value is 0 if the variable change is accepted and 1 otherwise.

 
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