Hi!
i have problem in writing and reading data on port E in at91sam9g45.
Data is not writing properly on port by following function.
at91_sys_write(AT91_PIOE, data);

Data is not properly reading from port pin by following function.
data = at91_sys_read(AT91_PIOE);

what is the function to read data from the port's latch?

are there any problem in any of the function please reply thanks in advance.

In what context? driver/kernel/user/uboot ?

Have you enabled the PMC clock for bank GPIOE ?

Can you access it from code running in AT91BootStrap, or from the console in uBoot?

yes, if i access using physical address of port and then using ioremap convert into virtual address and directly write or read port.

virtualAddr = ioremap(physicalAddr);
*virtualAddr = data;

above case is working in driver but in uboot i am not able to find file to include for ioremap function for at91sam9g45. if you have any idea which file to include for ioremap then please reply.

>>but in uboot i am not able to find file to include for ioremap function for at91sam9g45. if you have any idea which file to include for ioremap then please reply.

uBoot does not initialize the MMU, you do not have virtual memory until the kernel starts.

The registers will appear at their physical addresses as described in the manuals/documentation.