SDIO driver for OpenRD Ultimate/ Dreamplug

[Mattia Rossi]

On 07/01/12 08:20, Ian Lepore wrote:
> On Thu, 2012-01-05 at 18:24 +1100, Mattia Rossi wrote:
>> Hi all,
>>
>> I've tried to compile and use the SDIO driver found here:
>> http://people.freebsd.org/~raj/misc/mv_sdio.c
>>
>
> Hmmm, on second thought, I'll bet interrupt 34 needs to be listed in the
> sdio section of the FDT, not the gpio like I said earlier.  The code
> sets the resource id to 1 to allocate that interrupt, so it probably
> needs to be listed as the 2nd interrupt for the sdio dev.
>
> -- Ian
>

Well, right, I've had a look at that as well and couldn't find where the 
problem was, as:


sdio at 90000 {
	compatible = "mrvl,sdio";
         reg = <0x90000 0x134>;
         interrupts = <28>;
         interrupt-parent = <&PIC>;

         gpios = <&GPIO 29 1 0x00030000   /* GPIO[29]: IN_POL_LOW, IRQ 
(edge) */
                  &GPIO 34 2 0x00000000>; /* GPIO[34]: OUT */

         };

So the second SDIO pin is set to GPIO 34, thus the logical wiring should 
be correct.
The error message also complains about the GPIO PIN 34and not the 
Interrupt 34.

I've found the Marvell Kirkwood 88F6281 SOC documentation online, and 
compared the MPP map there to the FDT MPP map, and it fits the register 
settings, so no error there.  Given it's the same SOC as for the OpenRD 
Ultimate, it makes sense, as people using it would have complained 
otherwise. The same would apply to the GPIO description I believe.

But I don't really know, so maybe somebody with some more FDT knowledge 
could help us out here?

Mat