[PATCH] ARM: mach-imx/mx31_3ds: Fix IOMUX for SPI1 signals

[Sascha Hauer]

On Mon, Jun 20, 2011 at 09:43:13AM -0300, Fabio Estevam wrote:
> Hi Sascha,
> 
> On Mon, Jun 20, 2011 at 4:26 AM, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> > On Thu, Jun 16, 2011 at 01:42:52PM -0300, Fabio Estevam wrote:
> >> The LCD on the mx31_3ds board is connected to CSPI1.
> >
> > From the description I would say you remove exactly the setup we want
> > instead of adding it. Can you explain a bit more?
> 
> Sure, the original code was assuming that the CSPI1 pins on the
> MX31PDK were the primary pin function, which is incorrect.
> 
> On MX31PDK board these are the pins that provide CSPI1 functionality:
> 
> DSR_DCE1 (ALT mode 1) --> CSPI1_CLK
> RI_DCE1 (ALT mode 1) --> CSPI1_RDY
> 
> DTR_DTE1  -->CSI1_MOSI
> DSR_DTE1 --> CSPI1_MISO
> DTR_DCE2 ---> CSPI1_SS2
> 
> The 3 IOMUX settings above are done via GPR as per Table A-1 of the MX31RM.
> 
> So the patch I sent fixes the CSPI1 IOMUX and makes the LCD to be functional.
> 
> I think we haven't seen this before because probably Redboot was doing
> the IOMUX for us. After I switched to U-boot I was not able to get the
> LCD to work and now with this patch it is working fine. FSL BSP also
> does the IOMUX in the same way.
> 
> If you prefer I can post a v2 of this patch with a better explanation
> on the commit message.
> 

Yes please.

Sascha


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