I posted the original from home, and didn't have the contents of the config register. It is cfg 0x00103e00 Which I interpret as having bit 11 set: "1 Enable GPIO11 as GPIO11" from the manual.
I originally tried to call ioremap64(PPC440GX_GPIO0_ADDR,) directly, but got "unresolved symbol ioremap64". From inspection of ioremap(), the fixup for 0x40000700 translates to 0x140000700, and I get the same values in my code as I see from a "/proc/ocotea/gpio". Is my approach valid? Thanks, Ed On 2/14/06, Eugene Surovegin <ebs at ebshome.net> wrote: > On Tue, Feb 14, 2006 at 12:20:35AM -0500, Ed Goforth wrote: > > I am struggling with a problem and I hope someone can give me some > > pointers. We have a custom board with a 440gx. I need to drive GPIO11 > > low. The best as I can tell from the docs, I need to set bit 11 of the > > TCR to 1 and bit 11 of the OR to 0 to do this. > > Check that this pin is enabled as GPIO not as a function pin > (SDR0_PFC0 register). > > Also, just to be sure that you remapped GPIO registers correctly, use > ioremap64 with full physical address (not just low 32 bits). > > -- > Eugene > >
