Problem in setting the state of GPIO pin in PXA255

Hi,
    I am using Lubbock board (PXA255 based) and
linux-2.4.19-rmk7-pxa1.
    I am trying to set the state of GPIO pin using
GPSR/GPCR registers. But the state I am trying to set
is not reflected on the GPIO pin. The pin always
reatins its old state.

I am using the following piece of code in
the driver.

   set_GPIO_mode(81 | GPIO_OUT); 
   old_state = ( GPLR(81) & GPIO_bit(81))?1:0 ;
                  /* old_state is zero */
   GPSR(81) |= GPIO_bit(81); /*set pin state to 1*/
   new_state = ( GPLR(81) & GPIO_bit(81))?1:0 ;

But I always get new_state as zero.

I tried with other GPIO pins and found the same thing.

   Any idea why the GPIO pin state is not 
changing even after setting in GPSR/GPCR registers?
   Did I miss any settings in some other registers?


thanks,
Seshu



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