Subject: [PATCHv3 1/2] ARM: dts: socfpga: Fix SD card detect

From: [email-masked] (Dinh Nguyen)
Date: Wed, 22 Oct 2014 10:47:10 -0500

On 10/22/14, 10:45 AM, Doug Anderson wrote:
> Dinh,
> 
> (without the HTML mail this time, sorry)
> 
> On Tue, Oct 21, 2014 at 11:48 AM, Dinh Nguyen
> <[email-masked]> wrote:
>> On 10/21/2014 12:10 PM, Steffen Trumtrar wrote:
>>> Hi!
>>>
>>> On Tue, Oct 21, 2014 at 11:15:10AM -0500, dinguyen at opensource.altera.com wrote:
>>>> From: Dinh Nguyen <[email-masked]>
>>>>
>>>> Without this patch, the booting the SOCFPGA platform would hang at the
>>>> SDMMC driver loading. The issue, debugged by Doug Anderson, turned out
>>>> to be that the GPIO bank used by the SD card-detect was not set to
>>>> status="okay".
>>>>
>>>> Suggested-by: Doug Anderson <[email-masked]>
>>>> Signed-off-by: Dinh Nguyen <[email-masked]>
>>>> ---
>>>> v3: Correctly degugged the issue to be a gpio node not having status="okay"
>>>> ---
>>>>  arch/arm/boot/dts/socfpga_cyclone5_socdk.dts | 6 ++++++
>>>>  1 file changed, 6 insertions(+)
>>>>
>>>> diff --git a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
>>>> index d7296a5..03a3745 100644
>>>> --- a/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
>>>> +++ b/arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
>>>> @@ -37,6 +37,12 @@
>>>>               */
>>>>              ethernet0 = &gmac1;
>>>>      };
>>>> +
>>>> +    soc {
>>>> +            gpio at ff709000 {
>>>> +                    status = "okay";
>>>> +            };
>>>> +    };
> 
> I haven't dug into the details you provided about the GPIO
> infrastructure of socfpga, but it does seem like it might be nice to
> some easier way to reference things in
> "arch/arm/boot/dts/socfpga.dtsi".
> 
> Looking at other examples they call the "gpio at ff708000" "gpio0" and
> the sub node something like "porta".  Given that this is the only
> reference to the GPIO, it seems like now would be the time to change
> it.

Yeah...I like your idea. Let met get a new patch for that...

Thanks,
Dinh