It return -2 which should be -ENOENT. In the comment at the end of gpio_to_device() it is written "No such GPIO". Are there any prerequisites before calling gpio_request regarding device tree or something else?
On Thu, Aug 15, 2019 at 3:09 PM Adam Ford <[email protected]> wrote: > On Thu, Aug 15, 2019 at 7:46 AM Nemanja Savic <[email protected]> wrote: > > > > 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. > > Do you know what the negative value is? include/linux/errno.h should > have a list of error numbers which should correlate to the error > you're seeing. That should also tell you what the error means. From > there, you should be able to search the code for where that error > might return. > > adam > > _______________________________________________ > > U-Boot mailing list > > [email protected] > > https://lists.denx.de/listinfo/u-boot > -- Nemanja Savić _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
