OMAP GPIO controller bindings Required properties: - compatible: - "ti,omap2-gpio" for OMAP2 controllers - "ti,omap3-gpio" for OMAP3 controllers - "ti,omap4-gpio" for OMAP4 controllers - gpio-controller : Marks the device node as a GPIO controller. - #gpio-cells : Should be two. - first cell is the pin number - second cell is used to specify optional parameters (unused) - interrupt-controller: Mark the device node as an interrupt controller. - #interrupt-cells : Should be 2. The first cell is the GPIO number. The second cell is used to specify flags: bits[3:0] trigger type and level flags: 1 = low-to-high edge triggered. 2 = high-to-low edge triggered. 4 = active high level-sensitive. 8 = active low level-sensitive. OMAP specific properties: - ti,hwmods: Name of the hwmod associated to the GPIO: "gpio", being the 1-based instance number from the HW spec. - ti,gpio-always-on: Indicates if a GPIO bank is always powered and so will never lose its logic state. Example: gpio4: gpio4 { compatible = "ti,omap4-gpio"; ti,hwmods = "gpio4"; gpio-controller; #gpio-cells = <2>; interrupt-controller; #interrupt-cells = <2>; };