On Friday, April 28, 2017, Andy Shevchenko wrote: > > In the RZ/A1 HW manual you can kind of see that in 54.18 Port Control > Logical Diagram (but that wasn't obvious to me at first). > > Please, post a link to it or copy essential parts. This board the RZ/A1 GENMAI board. https://www.renesas.com/en-us/products/software-tools/boards-and-kits/evaluation-demo-solution-boards/genmai-cpu-board-rtk772100bc00000br.html The schematic is included in the "User's manual" https://www.renesas.com/en-us/doc/products/tool/doc/003/r20ut2596ej_r7s72100evum.pdf The RZ/A1H Hardware manual is here: https://www.renesas.com/en-us/document/hw-manual?hwLayerShowFlg=true&prdLayerId=186374&layerName=RZ%252FA1H&coronrService=document-prd-search&hwDocUrl=%2Fen-us%2Fdoc%2Fproducts%2Fmpumcu%2Fdoc%2Frz%2Fr01uh0403ej0300_rz_a1h.pdf&hashKey=54f335753742b5add524d4725b7242e6 Chapter 54 is the port/pin controller. "54.18 Port Control Logical Diagram" is the diagram I was talking about. Note that is says "Note: This figure shows the logic for reference, not the circuit." "54.3.13 Port Bidirection Control Register (PBDCn)" is the magic register needed to get some pins to work. > I'm quite skeptical that cheap hardware can implement something more > costable than simplest open-source / open-drain + bias I don't think this is an open-source / open-drain + bias issue. It's a "the internal signal paths are not getting hooked up correctly" issue. Regardless, on this part, we needed a way to flag that some pins when put in some function modes needed 'an extra register setting'. At first we tried to sneak that info in with a simple #define in the pin/pinmux DT node properties. But, Linus didn't want it there so we had to make up a new generic property called "bi-directional". What is your end goal here? Get "bi-directional" changed to something else? Chris ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
