Hi all,
I am struggling with porting our old board init code for a sabre auto based custom board with i.MX6 DualLite processor. The code used to work in our older u-boot version, but what I saw in mx6qsabreauto.c is that the new style is by using new driver model which means the gpio should be first requested. However gpio_request returns negative value in my case. Where could the problem be? As far as I could see our device tree doesn't reserve this pin for other purpose. It is even not mentioned there. The only thing related to those pins are iomux pin definitions in the device tree but removing that doesn't help at all. Also device tree for the Sabre Auto board doesn't mention gpio pins that they use in their u-boot. I am dealing with 2017.03 version of u-boot.