u-boot bug reading gpio - MitySOM-5CSX Altera Cyclone V - Critical Link Support

CWu-boot bug reading gpio

Added by Chris Ward over 9 years ago

I found a problem reading the HPS gpio in uboot.
E.g

MitySOM-5CSx # gpio input 41
gpio: pin 41 (bank/mask = 1/0x00001000)
gpio: pin 41 (bank/mask = 1/0x00001000)
gpio: pin 41 (gpio 41) value is 0

The value returned is always zero.

I tracked down the problem to the soc_gpio driver. The cause is that it is using the wrong register to read the state of an input.

The attached patch fixes it.

Chris Ward