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Mini-ITX Hardware Design z7100 itx out of box serial port demo not working...
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z7100 itx out of box serial port demo not working...

Former Member
Former Member over 10 years ago

FYI,

Just received a z7100 itx system. The quick start serial port demo didn't work. The qspi did work.

The flash cards that come with the units have 4 files (boot.bin, devicetree.dtb, uImage, uramdisk.image.gz)

Here are the sha1sum hashes for what was on the micro-sd card out of the box:

sha1sum *
f390e6da6b33f6a026bd170c5ec8bc75518297a1  boot.bin
5194fb35d77f3dc7f1244b73a1cb96d316009c65  devicetree.dtb
1d2684f4310866b224cdf19ffc469282fd48606d  uImage
de3afccaed2c84db2a1d34a964d4f4c6fdfe936b  uramdisk.image.gz

And here's the sha1sum of the the sd_card files posted on the
zedboard / itx z7100 out-of-the-box page:

sha1sum *
631390c1414862f793196ff0fba992945caf4e82  boot.bin
2923327d179bef9b741231e57f849d96fa3d8b45  devicetree.dtb
1d2684f4310866b224cdf19ffc469282fd48606d  uImage
de3afccaed2c84db2a1d34a964d4f4c6fdfe936b  uramdisk.image.gz

Notice that the boot.bin and the devicetree.dtb are different.

Moreover, reverse compiling the dtb file into a dts file and comparing reveals:

diff devicetreeB.dts devicetreeA.dts

166,167c166,167
<                 phy@7 {
<                     compatible = "marvell,88e1116r";
---
>                 phy@0 {
>                     compatible = "marvell,88e1518";
169c169,170
<                     reg = <0x7>;
---
>                     reg = <0x0>;
>                     marvell,reg-init = <0x3 0x10 0xff00 0x1e 0x3 0x11 0xfff0 0xa>;


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  • narrucmot
    0 narrucmot over 10 years ago

    There was a mistake in the original Out Of Box (OOB) Linux design for the Mini-ITX that prevented the Ethernet interface on the board from working 10/100 Mbps.  This was because the devicetree specified a PHY address of 0x7.  When a user would plug the board into a 10/100 router or switch the Ethernet MAC would try to auto-negotiate the link to that speed over the MDIO interface, but because the PHY address was wrong that auto-negotiation could never happen.  This was later fixed to correct the PHY address to 0x1 in the devicetree.  The corrected files were posted to the website

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