On Thu, Jul 21, 2016 at 6:21 PM, noman pouigt <variksla@xxxxxxxxx> wrote: > Is there any way to configure default settings for some of the gpios > eventhough there is no one driving them? There are gpio hogs but I don't remember which kernel we introduced them in. Please keep in sync with upstream. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/Documentation/devicetree/bindings/gpio/gpio.txt?id=6b516a1093006a39368dd11a5396be5bb00c99df > I am also trying to configure > some of the gpios as irq lines using just the device tree without > writing any device driver for it as it will be used by userspace. I don't recommend randomly using GPIO from userspace. Have you read: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/gpio/drivers-on-gpio.txt If you still have a valid usecase for userspace GPIO, consider getting the latest v4.8 kernel when it's out in some two months and use the new chardev ABI that I just merged. The sysfs ABI is not good, and that is why it has been obsolted. We can name lines with gpio-line-names =""; in device tree and there are example tools for how to use GPIOs from userspace in a proper way: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/tools/gpio > Just to workaround this problem I have created a dummy driver > specifically for this purpose. Is there any better way? Keeping in touch with upstream and driving changes upstream is always the best solution. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html