Hi Zhi Li

On Thu, 2026-02-26 at 11:20 +0800, 李志 wrote:

Hi Marcel,

Thanks for sharing the details.

1. I checked your log and noticed that the kernel cmdline already includes
   "clk_ignore_unused". Therefore, your issue does not appear to be the
   same as the one previously reported by Bo Gan.

Yes, that actually came from ESWIN's hifive-premier-p550_defconfig which I disabled now.

2. I also verified that v6.19.2 already contains the two eMMC fix patches:
   https://lore.kernel.org/all/CAPDyKFqcMyM-=x+2FWNLhHY=gu5ApHNPQhp0xBKDJGr7BhEx4Q@mail.gmail.com/ (local)
   https://lore.kernel.org/all/CAPDyKFrkEZDuMbGpfxismcx=vJkSSK_XbtB762+sUFocupT63w@mail.gmail.com/ (local)

Yes.

   A likely cause is that the eMMC DTS node is missing the AXI clock definition.
   Please refer to the DTS updates in the following pull request for reference:
   https://github.com/eswincomputing/linux-next/pull/20

Ah, that one helped (;-p).

BTW: For CPU frequency scaling to actually work one may additionally need CONFIG_RISCV_SBI_CPUIDLE=y.

3. In addition, please check whether CONFIG_GPIO_DWAPB=y is enabled in your
   kernel configuration. Since GMAC is built-in by default, it depends on
   GPIO being available during early initialization.

Yes, I also changed that from =m to =y (;-p).

Hope this helps narrow things down. Please let me know what you find.

Yes, it all works now perfectly incl. CPU frequency scaling. See [1].

Next one would be working PCIe and USB. Unfortunately, for PCIe on EBC77 one would likely need some sort of an
adapter cable/PCB. Maybe I can solder something together. Let's see...

Thank you very much!

[1] https://github.com/riscv/meta-riscv/pull/602

Best regards,
Zhi Li

Cheers

Marcel

quoted

-----原始邮件-----
发件人: "Marcel Ziswiler" [off-list ref]
发送时间:2026-02-21 02:37:57 (星期六)
收件人: lizhi2@eswincomputing.com, devicetree@vger.kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com,
rmk+kernel@armlinux.org.uk, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
抄送: ningyu@eswincomputing.com, linmin@eswincomputing.com, pinkesh.vaghela@einfochips.com,
weishangjuan@eswincomputing.com, dongxuyang@eswincomputing.com
主题: Re: [PATCH v2 0/2] net: stmmac: eic7700: fix EIC7700 eth1 RX sampling timing

Hi Zhi Li

Sorry, to steal this thread, but I do have a quick question concerning Ethernet on the EIC7700. Every time
I
enable gmac0 in the device tree my EBC7700 stops booting (e.g. SD card is no longer detected) while
Ethernet
does seem to at least get detected. This has been seen using next-20260219, stable v6.19.2 [1] as well as
6.18.0-rc6 [2]. Any idea what could be going wrong?

I admit so far I only do have one single EBC7700 at hand while waiting for further hardware to arrive.

Thanks!

[1] https://github.com/riscv/meta-riscv/pull/601
[2] https://github.com/eswincomputing/linux-next/tree/dev/test-upstream-v6.18-rc6

Cheers

Marcel

[snip]