Setting gpio input interrupt with direct memory access?

Published: 14/01/2020
Setting gpio input interrupt with direct memory access?
Source: RASPBERRYPI.STACKEXCHANGE.COM

I am new learner for raspberry pi 3B+, I ever study stm32 mcu, but it's my first time to use an Linux OS on a developing board. I read the BCM2837-ARM-Peripherals manaul and learn how to turn on and off led by access virtual address through ioremap_nocache(). It's not too difficult for me. But I would like to learn set a gpio input interrupt for a button, I try many ways but still fail. I refer

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