Slow write speeds to SD card on production module with L4T 32.4.4

Just want to clarify. For such issue, what you should share is the full dmesg, full dts and your schematic.

max-clk-limit is already removed in recent release. Thus, I am not sure what you are removing now.

And please tell us what did you add to the device tree. Please don’t expect that it will work by default with only hardware connection.

This link has all the basic patch that is required for sdmmc3.