Hi, On Thu, Dec 1, 2011 at 11:43 PM, Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> wrote: > * Olof Johansson wrote: >> Hi, >> >> On Thu, Nov 24, 2011 at 11:57 AM, Thierry Reding >> <thierry.reding@xxxxxxxxxxxxxxxxx> wrote: >> > Hi, >> > >> > I was wondering whether anyone had gotten MSI to work with Tegra2? The code >> > in arch/arm/mach-tegra/pcie.c has some comments saying that it currently >> > isn't supported. >> > >> > Looking through the Tegra2 TRM didn't show much related to MSI. In particular >> > there doesn't seem to be any mention of the AFI controller or any of it's >> > registers (except of how to enable/disable the AFI clock or reset the >> > controller). >> > >> > Furthermore I wasn't able to get PCIe to work on Harmony with a mainline >> > kernel. Is something missing or am I just doing something wrong? >> >> I think there might be an issue with regulator setup for pci-e, I got >> a vague bug report off-list from someone about it but I'm normally not >> using devices with pci-e on them myself. > > I've verified with a hardware engineer that the voltages indeed seem correct. > Even the PCIe reference clock can be measured at the mini-PCIe connectors. So > something must be going right. Ok, that's interesting. I haven't had a chance to give my harmony a spin with a pci-e card here lately, I'll try to give it a go as soon as I can but it'll be a few more days. >> Note that trimslice does enable pci-e, so you can use that for comparison. > > Trimslice doesn't seem to do much regarding PCIe initialization. It basically > just calls the tegra_pcie_init() and has the pinmuxing set up via the pinmux > table as opposed to Harmony. Right. > I'm thinking about ordering a Trimslice to use for comparison. Has anyone > else verified that mainline has working PCIe for Trimslice? I think Mike > Rapoport is no longer a regular on this list. His last commits seem to > indicate that PCIe was working on Harmony as well at the time, so I'm a > little confused about what might have happened since then. PCI-e works on mainline on trimslice, I have verified that myself. It has ethernet on pci-e, and both u-boot and the kernel can use it. Regards, Olof -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
