Hello.
Shmulik Ladkani wrote:
Thanks, Florian. I found the cause of the problem. My board is 32 bit
based, so each serial port register is 32bit even only 8 bit is used. So
when the board is switched endianess, I need to change the address
offset to access the same registers.
For example, original RHR register address is 0x8001000 with little
endian mode. With big endian, I need to access it as 0x8001003.
I assume your uart_port's iotype is defined as UPIO_MEM32.
He wouldn't have to add 3 to the register addresses then.
UPIO_MEM32 makes 8250 access serial registers using readl/writel (which might
be a problem for big-endian), while UPIO_MEM makes 8250 access the registers
using readb/writeb.
Both may be a problem for big endian.
Maybe you should try UPIO_MEM (assuming hardware allows byte access).
Contrarywise, I think he now has UPIO_MEM and needs to try UPIO_MEM32.
WBR, Sergei
