[U-Boot] [PATCH V4 5/7] README: Add description of SPI Flash (SF) command configuration

[Marek Vasut <marek.vasut@gmail.com>]

> ---
>  README |   20 ++++++++++++++++++++
>  1 files changed, 20 insertions(+), 0 deletions(-)
> 
> diff --git a/README b/README
> index f6ab85c..1a98915 100644
> --- a/README
> +++ b/README
> @@ -800,6 +800,7 @@ The following options need to be configured:
>  					  (requires CONFIG_CMD_I2C)
>  		CONFIG_CMD_SETGETDCR	  Support for DCR Register access
>  					  (4xx only)
> +		CONFIG_CMD_SF		* Read/write/erase SPI NOR flash

Why did you add the asterisk here ?

>  		CONFIG_CMD_SHA1SUM	  print sha1 memory digest
>  					  (requires CONFIG_CMD_MEMORY)
>  		CONFIG_CMD_SOURCE	  "source" command Support
> @@ -2179,6 +2180,25 @@ The following options need to be configured:
>  		allows to read/write in Dataflash via the standard
>  		commands cp, md...
> 
> +- Serial Flash support
> +		CONFIG_CMD_SF
> +
> +		Defining this option enables SPI flash commands
> +		'sf probe/read/write/erase/update'.
> +
> +		Usage requires an initial 'probe' to define the serial
> +		flash parameters, followed by read/write/erase/update
> +		commands.
> +
> +		The following defaults may be provided by the platform
> +		to handle the common case when only a single serial
> +		flash is present on the system.
> +
> +		CONFIG_SF_DEFAULT_BUS		Bus identifier
> +		CONFIG_SF_DEFAULT_CS		Chip-select
> +		CONFIG_SF_DEFAULT_MODE 		(see include/spi.h)
> +		CONFIG_SF_DEFAULT_SPEED		in Hz
> +
>  - SystemACE Support:
>  		CONFIG_SYSTEMACE