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@xxxxxxxxxxxxxxxxxxx> 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 -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
