About BillR

BillR · 2022-09-29

I am working with Murata community but thought I would also see if anyone has experience on our specific type of board. Our design is based on STM32MP175C. They mention needing custom FW and their Yocto layer, etc. Seems emphasized on working with N...

BillR · 2022-05-27

This is an STM32MP157c based board design with Micrel KSZ9021GN PHY in 100 MII mode. Have you ever seen this situation before? Here are the relevant parts of the boot, the early kernel part looks normal and the LEDs are on.... [ 2.507568] stm32-dw...

BillR · 2022-05-07

Same situation as before - using a STM32MP157C based design + KSZ9021GN PHY but now actually wired for MII mode. Previous board was wired for GMII mode, even verified by Microchip/Micrel, not realizing the MPU did not support that mode (should have c...

BillR · 2022-03-22

OpenStLinux 5.4 Dunfell 06 22 20 Boot chain of TF-A, U-Boot and kernel. I had forked the three .dts files with custom board names. TF-A starts fine.But in u-boot, hangs before it starts. With exact same dts contents just using original dts name as t...

BillR · 2022-03-11

Not sure if this is the best forum for this question but I am using the USB OTG port in device mode as ethernet gadget. It works fine if plugged in from boot, or first plug in anytime after. But if unplugged and plugged in again it will not come back...

BillR · 2022-06-03

Better yet, after noticing it wouldn't link in an old 10/100 hub, I realized this was a better idea: phy_write(phydev,0x09, 0x0000); // PHY register 9 - advertise only 10/100BaseT capable

BillR · 2022-06-02

After failing to find other device tree binding options that might deal with this, for now I ended up having to just force the PHY to 100Mbit mode as I needed a solution. I may look into the "right way" to handle this better in the future. In driver...

BillR · 2022-06-01

So I have found out a bit about this. It strikes me as a kernel bug. Even though I have configured for 100/MII in device tree, the PHY driver does not attempt to configurethe PHY for 10/100 and it stays in 125Mhz, failing the init due to bad clocks (...

BillR · 2022-06-01

Kevin, yes that was it! Because I didn't generate our DTs with CubeMX, but rather modified from existing files (an Octavo ref. design) I didn't realize the corresponding dtsi file was required since I didn't see it included in the dts. Thanks again, ...

BillR · 2022-05-09

All set now, it works. C8 was supposed to be 10uF, rather than 0.1uF for the proper reset timing.

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Putting the 1DX Murata WIFI into FCC test mode

Ethernet fails if cable plugged in during boot. If plugged in after boot, works.

STM32MP157C with MII PHY not working, attempt 2

u-boot with custom dts name won't boot

USB ethernet gadget stops working after replugging cable

Re: Ethernet fails if cable plugged in during boot. If plugged in after boot, works.

Re: Ethernet fails if cable plugged in during boot. If plugged in after boot, works.

Re: Ethernet fails if cable plugged in during boot. If plugged in after boot, works.

Re: u-boot with custom dts name won't boot

Re: STM32MP157C with MII PHY not working, attempt 2