Intel Apollo Lake GPIO controller
The Apollo Lake (APL) GPIO controller is used to control GPIO functions of
the pins.
Required properties:
- compatible: "intel,apl-gpio"
- #gpio-cells: Should be 2. The syntax of the gpio specifier used by client
nodes should be the following with values derived from the SoC user manual.
<[phandle of the gpio controller node]
[pin number within the gpio controller]
[flags]>
Values for gpio specifier:
- Pin number: is a GPIO pin number between 0 and 244
- Flags: GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW
- gpio-controller: Specifies that the node is a gpio controller.
Example:
...
{
p2sb: p2sb@d,0 {
reg = <0x02006810 0 0 0 0>;
compatible = "intel,p2sb";
early-regs = <IOMAP_P2SB_BAR 0x100000>;
north {
compatible = "intel,apl-pinctrl";
intel,p2sb-port-id = <PID_GPIO_N>;
gpio_n: gpio-n {
compatible = "intel,gpio";
gpio-controller;
#gpio-cells = <2>;
};
};
};
i2c_2: i2c2@16,2 {
compatible = "intel,apl-i2c", "snps,designware-i2c-pci";
reg = <0x0200b210 0 0 0 0>;
#address-cells = <1>;
#size-cells = <0>;
clock-frequency = <400000>;
tpm@50 {
reg = <0x50>;
compatible = "google,cr50";
u-boot,i2c-offset-len = <0>;
ready-gpios = <&gpio_n GPIO_28 GPIO_ACTIVE_LOW>;
};
};
};
...