On Friday, March 21, 2014 at 11:50:18 PM, Eric Nelson wrote:
[...]
- The kernel (old, I know) I am using does not like that PCIe to have
been formerly probed by u-boot. It hangs at probing if so.
We haven't had any trouble with our boundary-imx_3.0.35_4.1.0 branch (which is based on rel_imx_3.0.35_4.1.0):
https://github.com/boundarydevices/linux-imx6/tree/boundary-
imx_3.0.35_4.1
.0
You might give that a pin and see if it works for you. Troy did make some modifications to PCIe in that tree.
Let me remind you about that PCIe reset pin [1] again ... so, did you wire your PCIe slot's nRESET line or not on this design? Do you operate the nRESET correctly ?
Thus I have to patch my kernel, or add an environment variable to not initialize PCIe when set, in order to keep compatible with old kernels.
For now, in order to boot, I have temporary disabled PCIe support in U-boot.
Thanks for the ping.
Marek, I didn't catch that you had enabled PCIE by default.
Maybe Stefano applied the patch which enabled the PCIe on SL ? If you want it disabled, just submit a patch, either way WFM.
Since there aren't any peripherals which depend on this, and even the PCIe daughter board is an extra-cost item, I'd prefer to leave this disabled and require the user to enable it specifically.
AFAIK, you're the only one who's tested this.
Didn't you guys also test that ? But yes, I'm OK either way, feel free to send a patch.
[...]
[1] http://lists.denx.de/pipermail/u-boot/2014-February/172496.html
Best regards, Marek Vasut