sun7i: Add bananapi board

[oweals/u-boot.git] / README

diff --git a/README b/README
index 0c98545a0d174e6fd0daeed9d11d08de2dd620a6..f704eb3780082d76a93fe8a5d6a348f49ae7693f 100644 (file)
--- a/README
+++ b/README
@@ -2288,6 +2288,21 @@ CBFS (Coreboot Filesystem) support
                    9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung)
                    with a fix speed from 100000 and the slave addr 0!
 
+               - drivers/i2c/ihs_i2c.c
+                 - activate this driver with CONFIG_SYS_I2C_IHS
+                 - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0
+                 - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0
+                 - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0
+                 - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1
+                 - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1
+                 - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1
+                 - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2
+                 - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2
+                 - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2
+                 - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3
+                 - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3
+                 - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3
+
                additional defines:
 
                CONFIG_SYS_NUM_I2C_BUSES
@@ -3254,6 +3269,11 @@ FIT uImage format:
                disabled. If a board need legacy image format support
                enable this through CONFIG_IMAGE_FORMAT_LEGACY
 
+               CONFIG_FIT_DISABLE_SHA256
+               Supporting SHA256 hashes has quite an impact on binary size.
+               For constrained systems sha256 hash support can be disabled
+               with this option.
+
 - Standalone program support:
                CONFIG_STANDALONE_LOAD_ADDR
 
@@ -3716,6 +3736,22 @@ Configuration Settings:
 - CONFIG_SYS_MALLOC_LEN:
                Size of DRAM reserved for malloc() use.
 
+- CONFIG_SYS_MALLOC_F_LEN
+               Size of the malloc() pool for use before relocation. If
+               this is defined, then a very simple malloc() implementation
+               will become available before relocation. The address is just
+               below the global data, and the stack is moved down to make
+               space.
+
+               This feature allocates regions with increasing addresses
+               within the region. calloc() is supported, but realloc()
+               is not available. free() is supported but does nothing.
+               The memory will be freed (or in fact just forgotton) when
+               U-Boot relocates itself.
+
+               Pre-relocation malloc() is only supported on sandbox
+               at present but is fairly easy to enable for other archs.
+
 - CONFIG_SYS_BOOTM_LEN:
                Normally compressed uImages are limited to an
                uncompressed size of 8 MBytes. If this is not enough,
@@ -4069,6 +4105,43 @@ to save the current settings.
          environment area within the total memory of your DataFlash placed
          at the specified address.
 
+- CONFIG_ENV_IS_IN_SPI_FLASH:
+
+       Define this if you have a SPI Flash memory device which you
+       want to use for the environment.
+
+       - CONFIG_ENV_OFFSET:
+       - CONFIG_ENV_SIZE:
+
+         These two #defines specify the offset and size of the
+         environment area within the SPI Flash. CONFIG_ENV_OFFSET must be
+         aligned to an erase sector boundary.
+
+       - CONFIG_ENV_SECT_SIZE:
+
+         Define the SPI flash's sector size.
+
+       - CONFIG_ENV_OFFSET_REDUND (optional):
+
+         This setting describes a second storage area of CONFIG_ENV_SIZE
+         size used to hold a redundant copy of the environment data, so
+         that there is a valid backup copy in case there is a power failure
+         during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be
+         aligned to an erase sector boundary.
+
+       - CONFIG_ENV_SPI_BUS (optional):
+       - CONFIG_ENV_SPI_CS (optional):
+
+         Define the SPI bus and chip select. If not defined they will be 0.
+
+       - CONFIG_ENV_SPI_MAX_HZ (optional):
+
+         Define the SPI max work clock. If not defined then use 1MHz.
+
+       - CONFIG_ENV_SPI_MODE (optional):
+
+         Define the SPI work mode. If not defined then use SPI_MODE_3.
+
 - CONFIG_ENV_IS_IN_REMOTE:
 
        Define this if you have a remote memory space which you