Hi Stafford, I should clarify my setup: I'm using hardware address translation to make the OpenCores 8-bit GPIO appear as 32-bit to the CPU. Specifically:
1. Address translation: The CPU's 32-bit addresses are right-shifted by 2 bits (adr_i[2] in Verilog), so each 32-bit CPU access maps to the correct 8-bit OpenCores register. 2. Data width adaptation: Only dat_i[7:0] and dat_o[7:0] are connected, so 32-bit writes are truncated to 8-bit, and reads are zero-extended. This hardware wrapper makes brcm,bcm6345-gpio driver "work" with my OpenCores GPIO, but it's really a hardware-level compatibility layer, not true software compatibility. So you're absolutely right that the native opencores,gpio isn't compatible with brcm,bcm6345-gpio. My setup works because of custom hardware translation, not because the IP cores are compatible. Best regards, Gary
