Hello Albin,
I tried using your patches for the TNY-A9G20 on my QIL-A9G20 board from Calao. Everything seems to work properly except the RTC. They use the same M41T94 part and the CS is the same on both boards (PA3). I can set the RTC using the "date" command and read back the value okay. However, when I power cycle the board, the value is getting corrupted at startup due to some erroneous SPI write.
I don't believe the code you submitted is causing this problem because the RTC is getting corrupted even if I compile out SPI and RTC support completely. I was just wondering if you have seen this problem on your board? I probed the CS line with an oscilloscope and I am definitely seeing it go low on U-Boot startup for a short time, but the clock line seems to be floating. I believe the activation of the CS at startup is causing junk data to be written to the RTC, which is corrupting it. Any idea why this might be happenning?
Regards, Stephen