On Fri, Jun 10, 2016 at 2:53 PM, George McCollister <george.mccollis...@gmail.com> wrote: > On Thu, Jun 9, 2016 at 11:01 PM, Bin Meng <bmeng...@gmail.com> wrote: >> Hi, >> >> +Simon, ML and Stefan. >> >> On Wed, Jun 8, 2016 at 11:58 PM, vinoth eswaran <evinoth1...@gmail.com> >> wrote: >>> Hello Bin, >>> >>> Sorry that I don't know how not to reply without top-posting. I >>> don't know which settings to change, google didn't help me in this >>> case. >>> >> >> It's a posting style. See https://en.wikipedia.org/wiki/Posting_style. >> We use bottom-posting. >> >>> I have tested your patch on my target and found out that now mounting >>> root file system by sd card is fine. Thanks a lot :) >>> >> >> Great! >> >>> Now I am seeing another issue , the USB3.0 port (bottom) is not >>> working. I am sure that both ports are working fine with UEFI >>> Firmware. I tested by connecting a mouse to the USB port , in the >>> USB2.0 port (upper) it is working fine but in the USB3.0 port the >>> mouse is not getting detected. I am not sure why it is happening. I >>> looked into the kernel logs but I didn't get any error/debug messages. >>> Can you please check this on your board also. >>> >> >> Do you mean xHCI is not working under U-Boot? xHCI is not enabled in >> U-Boot yet. IIRC, U-Boot's xHCI driver does not support Intel >> controller yet. > I think he just means the bottom port isn't working. I had a patch set > to fix the problem but I never had time re-work the first patch in the > series. > http://lists.denx.de/pipermail/u-boot/2015-October/229469.html > Ya that's exactly is the problem. I will try to use the patch , but I am seeing many updates on the 'intel_ich6_gpio.c' which is hard to understand for me.
>> >>> Do you have any documents regarding the u-boot to kernel handover, >>> what all informations does u-boot handover to Linux Kernel. It would >>> be great help. >> >> This is documented in kernel doc: >> https://www.kernel.org/doc/Documentation/x86/boot.txt >> >>> I thought that the MMC driver issue is on Linux Kernel side, but it >>> was some offset and probing issue in the u-boot. >>> >> >> Umm, it's hard to tell. Starting from BayTrail, Intel's SoC is more >> and more like an ARM SoC, with many GPIOs and pinmux that needs to be >> configured. Linux kernel does provide driver for the BayTrail pinctrl, >> but so far no mainline driver is making use of it. The generic x86 >> kernel image is not aware of any board-specific I/O configuration so >> some peripherals (like in this case the SD controller) won't work out >> of the box. The mainline Linux kernel expects the underlying >> bootloader to do the I/O configuration, IOW, kernerl is not bootloader >> agnostic yet on x86. It relies on whatever bootloader (UEFI BIOS, >> coreboot, U-Boot) to do such kind of work. >> >> Regards, >> Bin >> _______________________________________________ >> U-Boot mailing list >> U-Boot@lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
