u-boot/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
arm,davinci: update for enbw_cmc board - change gpio pin settings: - gpio pin 6[13] (PLC reset) default value low - gpio pin 6[0] (TPM reset) default value low - 4 new GPIO pins pin i/o name - 3[9] input Board Type - 2[7] input HW-ID0 - 2[6] input HW-ID1 - 2[3] input HW-ID2 - read board type and hw id from gpio pins on the enbw_cmc board, and use board type for setting up different gpio pin settings. - do not pass "davinci_mmc.use_dma=0" to linux, as MMC now works with DMA. - update logbuf support: store post word in RTC scratch register - add support for configuring KSZ8864RMN switch through a config file on u-boot startup. For more infos see: doc/README.switch_config Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Wolfgang Denk <wd@denx.de> Cc: Tom Rini <tom.rini@gmail.com> Cc: Christian Riesch <christian.riesch@omicron.at> Cc: Sandeep Paulraj <s-paulraj@ti.com> 2012-05-14 20:24:14 +00:00			`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`