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- Binding for Nexell s5pxx18 pin cotroller
- ========================================
- Nexell's ARM bases SoC's integrates a GPIO and Pin mux/config hardware
- controller. It controls the input/output settings on the available pads/pins
- and also provides ability to multiplex and configure the output of various
- on-chip controllers onto these pads.
- Please refer to pinctrl-bindings.txt in this directory for details of the
- common pinctrl bindings used by client devices, including the meaning of the
- phrase "pin configuration node".
- Required properties:
- - compatible: "nexell,s5pxx18-pinctrl"
- - reg: should be register base and length as documented in the datasheet
- - interrupts: interrupt specifier for the controller over gpio and alive pins
- Example:
- pinctrl_0: pinctrl@c0010000 {
- compatible = "nexell,s5pxx18-pinctrl";
- reg = <0xc0010000 0xf000>;
- u-boot,dm-pre-reloc;
- };
- Nexell's pin configuration nodes act as a container for an arbitrary number of
- subnodes. Each of these subnodes represents some desired configuration for a
- pin, a group, or a list of pins or groups. This configuration can include the
- mux function to select on those pin(s)/group(s), and various pin configuration
- parameters.
- Child nodes must be set at least one of the following settings:
- - pins = Select pins for using this function.
- - pin-function = Select the function for use in a selected pin.
- - pin-pull = Pull up/down configuration.
- - pin-strength = Drive strength configuration.
- Valid values for nexell,pins are:
- "gpioX-N" : X in {A,B,C,D,E}, N in {0-31}
- Valid values for nexell,pin-function are:
- "N" : N in {0-3}.
- This setting means that the value is different for each pin.
- Please refer to datasheet.
- Valid values for nexell,pin-pull are:
- "N" : 0 - Down, 1 - Up, 2 - Off
- Valid values for nexell,pin-strength are:
- "N" : 0,1,2,3
- Example:
- - pin settings
- mmc0_clk: mmc0-clk {
- pins = "gpioa-29";
- pin-function = <1>;
- pin-pull = <2>;
- pin-strength = <2>;
- };
- mmc0_cmd: mmc0-cmd {
- pins = "gpioa-31";
- pin-function = <1>;
- pin-pull = <2>;
- pin-strength = <1>;
- };
- mmc0_bus4: mmc0-bus-width4 {
- pins = "gpiob-1, gpiob-3, gpiob-5, gpiob-7";
- pin-function = <1>;
- pin-pull = <2>;
- pin-strength = <1>;
- };
- - used by client devices
- mmc0:mmc@... {
- pinctrl-names = "default";
- pinctrl-0 = <&mmc0_clk>, <&mmc0_cmd>, <&mmc0_bus4>;
- ...
- };
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