On Tue, 2014-10-21 at 10:52PM +0200, Andreas Färber wrote: > Hi Olof and Sören, > > Am 18.10.2014 um 06:28 schrieb Olof Johansson: > > On Thu, Jul 24, 2014 at 4:00 PM, Andreas Färber <afaerber@xxxxxxx> wrote: > >> Hello, > >> > >> This patch series adds an initial device tree for the Parallella board. > >> UART, SD card, Ethernet are enabled. > >> Not yet enabled are HDMI, QSPI flash and 2x USB. > > > > Andreas (Olofsson) kindly sent me a board, and I added it to the boot > > farm today, it'll be included in boot reports from here on. > > Good to hear. > > > I did a test run with yesterday's -next It looks like networking isn't > > working there at the moment, clock related. Same happens with 3.17 and > > latest mainline, config multi_v7_defconfig: > > > > [WARN] [ 7.943648] macb e000b000.ethernet eth0: unable to generate > > target frequency: 125000000 Hz > > [WARN] [ 10.948681] macb e000b000.ethernet eth0: unable to generate > > target frequency: 125000000 Hz > > I am unable to reproduce this in my setup - at Linus' tip > c2661b806092d8ea2dccb7b02b65776555e0ee47 (v3.18-rc1-68-gc2661b8), make > oldconfig'ing my /proc/config.gz. > > Sören, in light of your explanations, should I be expecting problems > with 1GbE or with 100MbE? My board is connected to a 1GbE switch. Not in general. As I said, I haven't seen that on our boards yet and I did a little bit of testing making sure that the fundamental code to switch between frequencies works. I.e. on our zc706 and zc702 boards I usually can use ethtool to force a certain speed on the interface and Zynq adjusts to it just fine. But as I said, it does rely on the divider being sourced with a frequency that allows generating the required Ethernet clock by adjusting the 6-bit divider only. If this requirement is not met, I expect you may see issues like Olof posted. Are you (Andreas/Olof) using the same bootloaders? I hope that helps. Sören -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
