Manual Pages  — fdt_pinctrl

#include <dev/fdt/fdt_pinctrl.h>

static int
foo_configure_pins(device_t dev, phandle_t cfgxref)
{
        phandle_t cfgnode;
        uint32_t *pins, *functions;
        int npins, nfunctions;

        cfgnode = OF_node_from_xref(cfgxref);
        pins = NULL;
        npins = OF_getencprop_alloc_multi(cfgnode, "foo,pins", sizeof(*pins),
            (void **)&pins);
        functions = NULL;
        nfunctions = OF_getencprop_alloc_multi(cfgnode, "foo,functions",
            sizeof(*functions), (void **)&functions);
        ...
}

static int
foo_is_gpio(device_t dev, device_t gpiodev, bool *is_gpio)
{
        return (foo_is_pin_func_gpio(is_gpio));
}

static int
foo_set_flags(device_t dev, device_t gpiodev, uint32_t pin, uint32_t flags)
{
        int rv;

        rv = foo_is_pin_func_gpio(is_gpio);
        if (rv != 0)
                return (rv);
        foo_set_flags(pin, flags);
        return (0);
}

static int
foo_get_flags(device_t dev, device_t gpiodev, uint32_t pin, uint32_t *flags)
{
        int rv;

        rv = foo_is_pin_func_gpio(is_gpio);
        if (rv != 0)
                return (rv);
        foo_get_flags(pin, flags);
        return (0);
}

static int
foo_attach(device_t dev)
{
        ...

        fdt_pinctrl_register(dev, "foo,pins");
        /*
         * It is possible to register more than one pinprop handler
         */
        fdt_pinctrl_register(dev, "bar,pins");
        fdt_pinctrl_configure_tree(dev);

        return (0);
}

static device_method_t foo_methods[] = {
        ...

        /* fdt_pinctrl interface */
        DEVMETHOD(fdt_pinctrl_configure, foo_configure_pins),
        DEVMETHOD(fdt_pinctrl_is_gpio, foo_is_gpio),
        DEVMETHOD(fdt_pinctrl_set_flags, foo_set_flags),
        DEVMETHOD(fdt_pinctrl_get_flags, foo_get_flags),

        /* Terminate method list */
        DEVMETHOD_END
};

DRIVER_MODULE(foo, simplebus, foo_driver, foo_devclass, NULL, NULL);