Re: AM335x BeagleBone SPI Issues

["Jan Lübbe" <jlu@pengutronix.de>]

Hi,

On Tue, 2012-12-11 at 17:02 +0000, Jack Mitchell wrote:
> On 11/12/12 16:24, Jack Mitchell wrote:
> > On 11/12/12 15:22, Ben Gamari wrote:
> >> Jack Mitchell <ml@communistcode.co.uk> writes:
> >>> Thank you, the reordering dma patch fixed the dma issue I was having!
> >>> However, the bad news, I now get the same results for the dma and
> >>> non-dma spidev test. While the scope shows the SPI clk and data is 
> >>> fine,
> >>> the reading from the program still shows 0x00 for all words.
> >>>
> >> Just to make sure this has been thought of: I've seen this sort of
> >> behavior in the past when the CLK pin wasn't configured as an input.

*snip*

> My bad! The jumper bridge had come loose, it works now! Yippee!
> 
> root@beaglebone:~# ./spidev -D /dev/spidev2.0
> spi mode: 0
> bits per word: 16
> max speed: 24000000 Hz (24000 KHz)
> 
> FF FF FF FF FF FF
> 40 00 00 00 00 95
> FF FF FF FF FF FF
> FF FF FF FF FF FF
> FF FF FF FF FF FF
> DE AD BE EF BA AD
> F0 0D
> root@beaglebone:~#
> 
> Thanks everyone, and do I need to submit any patches to clear this all up?
> 
> Currently all I see is changing the clk pins from output to input (if 
> this is a valid change?).

I just stumbled over the same problem and have not seen any patch for
this fix. Have I missed something or should I send a patch? Which would
be the correct base for such a patch?

Regards,
Jan
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