According from @ankithsingh, GPIO index is defined at $L4T_Sources/r32.4.3/Linux_for_Tegra/source/public/kernel/kernel-4.9/include/dt-bindings/gpio/tegra-gpio.h.
But I don’t know how to get GPIO address exactly. In gpionano.h, GPIO_216’ address is 0x6000d60C, and GPIO_50’s address is 0x6000d108. However, GPIO06 = GPIO3_PI.00 = ( 8 * 8 ) + 0 = 64, so it is mapped to GPIO_64 but I don’t know get related GPIO address.
Can you teach me about GPIO address getting formula?