Hi, I'm currently trying to port mainline to the GPD XD. This is an handled game console, running an rk3288. My current situation is the following: - the buttons are connected to GPIOs, so they are well defined by a gpio-keys - the joysticks are connected on I2C - the device can connect to other gamepad (for instance through USB) My problem is that I need a way to describe in the DTS that the buttons and the joystick are the same game controller. In Linux userland, this means that at the moment, there is one inputX for the buttons, one for the joysticks, one for an external gamepad. Most applications will be lost, and consider those are three different game controllers. Hence, the OS needs a way to know, via the device-tree description, that the two first input have to be merged. I see two possibilities: - do a sort of master/slave description, where the joystick's driver has a slave-device = <&gpio-keys> property - do a brand new i2c driver/compatible for the joystick, including the description of the keys on gpios But both of those ideas seems clunky to me... Would you have some suggestion? Thanks, -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
