// this is the example zmatt gave of how to make a pinmux helper
/ {
    my-pinmux-switch {
        compatible = "bone-pinmux-helper";
        pinctrl-names = "default", "foo", "bar";
        pinctrl-0 = <...>;  // pinctrl nodes for the "default" state
        pinctrl-1 = <...>;  // pinctrl nodes for the "foo" state
        pinctrl-2 = <...>;  // pinctrl nodes for the "bar" state
    };
};

// this is the example zmatt gave of doing pinmux
&dra7_pmx_core {
	mcspi3_pins: mcspi3 {
		pinctrl-single,pins = <
			// mcspi3 ioset 6
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 228, PIN_OUTPUT_PULLUP | MUX_MODE1 )  // P17.33  cs1
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 224, PIN_INPUT_PULLUP  | MUX_MODE1 )  // P17.04  clk
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 225, PIN_OUTPUT_PULLUP | MUX_MODE1 )  // P17.07  d1 (mosi)
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 226, PIN_INPUT_PULLUP  | MUX_MODE1 )  // P17.36  d0 (miso)
		>;
	};
};

// putting them together gives (hopefully)

/ {
    my-pinmux-switch {
        compatible = "bone-pinmux-helper";
        pinctrl-names = "default", "foo", "bar";
        pinctrl-0 = <
			// mcspi3 ioset 6
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 228, PIN_OUTPUT_PULLUP | MUX_MODE1 )  // P17.33  cs1
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 224, PIN_INPUT_PULLUP  | MUX_MODE1 )  // P17.04  clk
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 225, PIN_OUTPUT_PULLUP | MUX_MODE1 )  // P17.07  d1 (mosi)
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 226, PIN_INPUT_PULLUP  | MUX_MODE1 )  // P17.36  d0 (miso)
		>;  // pinctrl nodes for the "default" state (puts pins in mux mode 1)
        pinctrl-1 = <
			// mcspi3 ioset 6
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 228, PIN_OUTPUT_PULLUP | MUX_MODE2 )  // P17.33  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 224, PIN_INPUT_PULLUP  | MUX_MODE2 )  // P17.04  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 225, PIN_OUTPUT_PULLUP | MUX_MODE2 )  // P17.07  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 226, PIN_INPUT_PULLUP  | MUX_MODE2 )  // P17.36  ?
		>;  // pinctrl nodes for the "foo" state (puts pins in mux mode 2)
        pinctrl-2 = <
			// mcspi3 ioset 6
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 228, PIN_OUTPUT_PULLUP | MUX_MODE3 )  // P17.33  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 224, PIN_INPUT_PULLUP  | MUX_MODE3 )  // P17.04  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 225, PIN_OUTPUT_PULLUP | MUX_MODE3 )  // P17.07  ?
			DRA7XX_CORE_IOPAD( 0x3400 + 4 * 226, PIN_INPUT_PULLUP  | MUX_MODE3 )  // P17.36  ?
		>;  // pinctrl nodes for the "bar" state (puts pins in mux mode 3)
    };
};