Re: [PATCH v6 1/6] dt-bindings: gpio-mmio: Correct opencores GPIO

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