Re: [Gumstix-users] Buildroot Questions

[Craig H. <cr...@gu...>]

On Jun 2, 2006, at 12:14 AM, Demetris Zavorotnichenko wrote:

> pxaregs GPCR0_16 1
> pxaregs GPDR0_16 1
> pxaregs GPSR0_16 1         <=  (to enable the LCD)

> How do i add the registers for the Samsung in the U-boot based on  
> the bove?

u-boot doesn't have an easy way to set the GPxx registers (though it  
would be pretty easy to add a "gpio" command similar to the linux / 
proc/gpio thing).  You'd have to use mw.l to write the register  
directly in memory; you could do that in your bootcmd before the  
"bootm" call.  Alternatively, if you don't need the Samsung GPIO  
thing set before linux runs, then you could have a simple /etc/init.d  
script which uses /proc/gpio to twiddle the line you want.

C