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If you have any dev board then try interfacing it by using library provided by microchip. In the future if we progress to battery powered systems i will make modifications to do the polling. It is just weird that it would work great in U-boot, but not in the kernel that is what made me assume software issue.
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According to the LANA datasheet the logic should detect the presence of the signals when plugged in and power back up. Energy consumption or power consumption in a processor? The time now is If the current consumption is a result of some error the IC could die in the field.
Re: [PATCH v2] net: phy: workaround for buggy cable detection by LAN8700 after cable plugging
Please check if your 50MHz clocks collide when the kernel boots. Dynamic IR drop analysis 7. How to analyze power consumption in this low power design? So my assumption here is that since the Lab8720a is in energy detect power-down it will not be sending anything out and i am guessing after a few seconds of no activity on a port the switch Netgear FSv2 stops sending anything down that port since it “learns” there is nothing there.
I looked through the PHY datasheet today and I ,inux that there may be a hardware issue.
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Linux source code: drivers/net/phy/smsc.c (v) – Bootlin
If you do not apply the configuration pulling resistors on your board, then the internal pull-ups on the LAN apply and the Waveshare board will default as follows: Similar Threads Power consumption in a cellphone to determine IC power consumption 1. Therefore, the Waveshare board should configure into the same mode as the LAN reference schematic.
Plugged in while in U-Boot before booting to Kernel: Awesome, thanks for lzn8720a reassurance! Nov 27, 2: Plugged in after the Kernel is started: I’m working on a commercial product and must be absolutely sure that my design is OK. Alright i stepped through the Kernel code and i found it was a powersave feature.
The communication is working properly. Thank you for linx the help and suggestions!!! Resistors R11 R12 R14 have different value if we compare it to Microchips schematic.