Davinci/Keystone GPIO controller bindings Required Properties: - compatible: should be "ti,dm6441-gpio": for Davinci da850 SoCs "ti,keystone-gpio": for Keystone 2 66AK2H/K, 66AK2L, 66AK2E SoCs "ti,k2g-gpio", "ti,keystone-gpio": for 66AK2G - reg: Physical base address of the controller and the size of memory mapped registers. - 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-parent: phandle of the parent interrupt controller. - interrupts: Array of GPIO interrupt number. Only banked or unbanked IRQs are supported at a time. - ti,ngpio: The number of GPIO pins supported. - ti,davinci-gpio-unbanked: The number of GPIOs that have an individual interrupt line to processor. - clocks: Should contain the device's input clock, and should be defined as per the appropriate clock bindings consumer usage in, Documentation/devicetree/bindings/clock/keystone-gate.txt for 66AK2HK/66AK2L/66AK2E SoCs or, Documentation/devicetree/bindings/clock/ti,sci-clk.txt for 66AK2G SoCs - clock-names: Name should be "gpio"; Currently clock-names and clocks are needed for all keystone 2 platforms Davinci platforms do not have DT clocks as of now. The GPIO controller also acts as an interrupt controller. It uses the default two cells specifier as described in Documentation/devicetree/bindings/ interrupt-controller/interrupts.txt. Example: gpio: gpio@1e26000 { compatible = "ti,dm6441-gpio"; gpio-controller; #gpio-cells = <2>; reg = <0x226000 0x1000>; interrupt-parent = <&intc>; interrupts = <42 IRQ_TYPE_EDGE_BOTH 43 IRQ_TYPE_EDGE_BOTH 44 IRQ_TYPE_EDGE_BOTH 45 IRQ_TYPE_EDGE_BOTH 46 IRQ_TYPE_EDGE_BOTH 47 IRQ_TYPE_EDGE_BOTH 48 IRQ_TYPE_EDGE_BOTH 49 IRQ_TYPE_EDGE_BOTH 50 IRQ_TYPE_EDGE_BOTH>; ti,ngpio = <144>; ti,davinci-gpio-unbanked = <0>; interrupt-controller; #interrupt-cells = <2>; }; leds { compatible = "gpio-leds"; led1 { label = "davinci:green:usr1"; gpios = <&gpio 10 GPIO_ACTIVE_HIGH>; ... }; led2 { label = "davinci:red:debug1"; gpios = <&gpio 11 GPIO_ACTIVE_HIGH>; ... }; }; Example for 66AK2G: gpio0: gpio@2603000 { compatible = "ti,k2g-gpio", "ti,keystone-gpio"; reg = <0x02603000 0x100>; gpio-controller; #gpio-cells = <2>; interrupts = , , , , , , , , ; interrupt-controller; #interrupt-cells = <2>; ti,ngpio = <144>; ti,davinci-gpio-unbanked = <0>; clocks = <&k2g_clks 0x001b 0x0>; clock-names = "gpio"; }; Example for 66AK2HK/66AK2L/66AK2E: gpio0: gpio@260bf00 { compatible = "ti,keystone-gpio"; reg = <0x0260bf00 0x100>; gpio-controller; #gpio-cells = <2>; /* HW Interrupts mapped to GPIO pins */ interrupts = , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ; clocks = <&clkgpio>; clock-names = "gpio"; ti,ngpio = <32>; ti,davinci-gpio-unbanked = <32>; };