Intel x86 PINCTRL/GPIO controller
Pin-muxing on x86 can be described with a node for the PINCTRL master
node and a set of child nodes for each pin on the SoC.
The PINCTRL master node requires the following properties:
- compatible : "intel,x86-pinctrl"
Pin nodes must be children of the pinctrl master node and can
contain the following properties:
- pad-offset - (required) offset in the IOBASE for the pin to configure
- gpio-offset - (required only when 'mode-gpio' is set) 2 cells
- offset in the GPIOBASE for the pin to configure
- the bit shift in this register (4 = bit 4)
- mode-gpio - (optional) standalone property to force the pin into GPIO mode
- mode-func - (optional) function number to assign to the pin. If
'mode-gpio' is set, this property will be ignored.
in case of 'mode-gpio' property set:
- output-value - (optional) this set the default output value of the GPIO
- direction - (optional) this set the direction of the gpio
- pull-strength - (optional) this set the pull strength of the pin
- pull-assign - (optional) this set the pull assignement (up/down) of the pin
- invert - (optional) this input pin is inverted
Example:
pin_usb_host_en0@0 {
gpio-offset = <0x80 8>;
pad-offset = <0x260>;
mode-gpio;
output-value = <1>;
direction = <PIN_OUTPUT>;
};