[people/ms/u-boot.git] / doc / README.switch_config

On the enbw_cmc board is a KSZ8864RMN switch which needs
configured through spi before working. This is done on
startup from u-boot through a config file stored at an
address specified in the "hwconfig" environment variable,
subcommand "config".

For example on the enbw_cmc board:

hwconfig=switch:lan=on,pwl=off,config=0x60160000

The file has the following structure:

- a comment starts with a '#' or a ';' and ends with a newline
- The switch needs for its config a reg/value pair, so we
  have two columns in the file:
    reg  : contains the register address
    value: contains a 8 bit register value
  This 2 columns are seperated through space or tab.

example (minimal configuration on the enbw_cmc board):

;reg    value   comment
;-----------------------------------------
0x01	0x00
0x01	0x01    ; Start Switch with this configuration
Commit	Line	Data
14b9f16c HS	1	On the enbw_cmc board is a KSZ8864RMN switch which needs
	2	configured through spi before working. This is done on
	3	startup from u-boot through a config file stored at an
	4	address specified in the "hwconfig" environment variable,
	5	subcommand "config".
	6
	7	For example on the enbw_cmc board:
	8
	9	hwconfig=switch:lan=on,pwl=off,config=0x60160000
	10
	11	The file has the following structure:
	12
	13	- a comment starts with a '#' or a ';' and ends with a newline
	14	- The switch needs for its config a reg/value pair, so we
	15	have two columns in the file:
	16	reg : contains the register address
	17	value: contains a 8 bit register value
	18	This 2 columns are seperated through space or tab.
	19
	20	example (minimal configuration on the enbw_cmc board):
	21
	22	;reg value comment
	23	;-----------------------------------------
	24	0x01 0x00
	25	0x01 0x01 ; Start Switch with this configuration