Hello everyone!
I use iMX6qp board with PCA9554 as a button controller. I made it work with proper driver in my device tree:
i2c3 {
...
pca9554_expander1: pca9554@22 {
compatible = "nxp,pca9554";
reg = <0x22>;
gpio-controller;
};
...
};
And now I see my GPIO expander in sysfs like
gpiochip7: GPIOs 504-511, parent: i2c/2-0022, pca9554
I want to configure buttons connected to PCA9554 as gpio-keys like:
enter_btn: enter_btn {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpiobuttons1>;
enter-button {
label = "enter-button";
linux,code = <28>; /* ENTER */
gpios = <&gpio7 2 0>;
};
};
But I cannot do it in a device tree because gpio-expander gpiochip7 is created just when pca9554 driver is loaded.
How can I set this device as a correct gpio controller and configure it for gpio-buttons?
Thanks for any useful information!
