Hi Stefan,
On 19 Sep 2024, at 12:36, Stefan Agner stefan@agner.ch wrote:
Hi Ivan,
I am looking into enabling NVMe boot support using U-Boot on Raspberry Pi 5. Which brings me to some questions wrt PCIe support (see below).
On 2024-01-10 13:29, Ivan T. Ivanov wrote:
- I am dropping PCIe patch for now. I made some progress on porting changes
from vendor Linux tree to U-Boot. Unfortunatly testing it is little bit tricky. They are many devices behind PCIe, but more or less all of them requires missing either "reset-controller" or "clock-controller" or "pin-controller" drivers. I was able to probe "cdns,macb" device, but access to ethernet PHY over MDIO bus is stucking. Then I ported "raspberrypi,rp1-adc" driver from vendor Linux tree, but it requires missing clock. And on top of that machine that I used for developing this crashed and I lost my PCIe changes :-|. Anyway.
Have you tried using a M.2 HAT? This likely won't require much in terms of enabling the device.
You write that you made some progress, is that compared to v3? Do you mind sharing the latest version of your patches?
No further progress on PCIe for U-Boot from my side was made, sorry.
Stan is working on adding support for 2712 PCIe in Linux [1]. Perhaps once this is complete we can work on adding U-Boot support for the same, unless someone don’t beat us, of course.
Regards, Ivan