[U-Boot] configuring u-boot for custom board based on beaglebone(am335xx_evm)

[Yegor Yefremov]

On Wed, Dec 19, 2012 at 3:07 PM, Pavan <pavanpatil.elec999 at gmail.com> wrote:
> Hi,
>
>            i need to configure u-boot-2013.01.rc2 for my custom board, that
> is completely based on beaglebone Rev A3,i have mux.h file according to my
> hardware i am not understanding the codeflow of beaglebone for include the
> mux.h.
>
> i have some extra hardware on my board,but first i need to understand the
> codeflow for beaglebone then only i can change the all required files
> according to my hardware.
>
> Can you please tell me which are the files i need to change? or u-boot is
> using pin-mux for baglebone?

No

> I checked the file include/configs/am335x_evm.h and also in board/ti/am335x
> directory the mux.c is there,but i didn't  understand the codeflow properly?

As you can see mux.c provides pinmuxes for dedicated hardware parts
like UART, I2C etc. In  enable_board_pin_mux() u-boot decides what
board it is running on and activates relevant hardware parts. main
line kernel makes the same. This was different for am3517 though.

Yegor