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-* MediaTek MT6797 Pin Controller
-
-The MediaTek's MT6797 Pin controller is used to control SoC pins.
-
-Required properties:
-- compatible: Value should be one of the following.
-              "mediatek,mt6797-pinctrl", compatible with mt6797 pinctrl.
-- reg:        Should contain address and size for gpio, iocfgl, iocfgb,
-              iocfgr and iocfgt register bases.
-- reg-names:  An array of strings describing the "reg" entries. Must
-              contain "gpio", "iocfgl", "iocfgb", "iocfgr", "iocfgt".
-- gpio-controller: Marks the device node as a gpio controller.
-- #gpio-cells: Should be two. The first cell is the gpio pin number
-               and the second cell is used for optional parameters.
-
-Optional properties:
-- interrupt-controller: Marks the device node as an interrupt controller.
-- #interrupt-cells: Should be two.
-- interrupts : The interrupt outputs from the controller.
-
-Please refer to pinctrl-bindings.txt in this directory for details of the
-common pinctrl bindings used by client devices.
-
-Subnode format
-A pinctrl node should contain at least one subnodes representing the
-pinctrl groups available on the machine. Each subnode will list the
-pins it needs, and how they should be configured, with regard to muxer
-configuration, pullups, drive strength, input enable/disable and input schmitt.
-
-    node {
-        pinmux = <PIN_NUMBER_PINMUX>;
-        GENERIC_PINCONFIG;
-    };
-
-Required properties:
-- pinmux: Integer array, represents gpio pin number and mux setting.
-    Supported pin number and mux varies for different SoCs, and are defined
-    as macros in dt-bindings/pinctrl/<soc>-pinfunc.h directly.
-
-Optional properties:
-- GENERIC_PINCONFIG: is the generic pinconfig options to use, bias-disable,
-    bias-pull, bias-pull-down, input-enable, input-schmitt-enable,
-    input-schmitt-disable, output-enable output-low, output-high,
-    drive-strength, and slew-rate are valid.
-
-    Valid arguments for 'slew-rate' are '0' for no slew rate controlled and
-    '1' for slower slew rate respectively. Valid arguments for 'drive-strength'
-    is limited, such as 2, 4, 8, 12, or 16 in mA.
-
-    Some optional vendor properties as defined are valid to specify in a
-    pinconf subnode:
-    - mediatek,tdsel: An integer describing the steps for output level shifter
-      duty cycle when asserted (high pulse width adjustment). Valid arguments
-      are from 0 to 15.
-    - mediatek,rdsel: An integer describing the steps for input level shifter
-      duty cycle when asserted (high pulse width adjustment). Valid arguments
-      are from 0 to 63.
-    - mediatek,pull-up-adv: An integer describing the code R1R0 as 0, 1, 2
-      or 3 for the advanced pull-up resistors.
-    - mediatek,pull-down-adv: An integer describing the code R1R0 as 0, 1, 2,
-      or 3 for the advanced pull-down resistors.
-
-Examples:
-
-        pio: pinctrl@10005000 {
-                compatible = "mediatek,mt6797-pinctrl";
-                reg = <0 0x10005000 0 0x1000>,
-                      <0 0x10002000 0 0x400>,
-                      <0 0x10002400 0 0x400>,
-                      <0 0x10002800 0 0x400>,
-                      <0 0x10002C00 0 0x400>;
-                reg-names = "gpio", "iocfgl", "iocfgb",
-                            "iocfgr", "iocfgt";
-                gpio-controller;
-                #gpio-cells = <2>;
-
-                uart1_pins_a: uart1 {
-                        pins1 {
-                                pinmux = <MT6797_GPIO232__FUNC_URXD1>,
-                                         <MT6797_GPIO233__FUNC_UTXD1>;
-                        };
-                };
-        };