Some problems with kernel module und device tree..

Code:

&i2c2 {

    pinctrl-names = "default";

    pinctrl-0 = <&i2c2_pins_a>;

    status = "okay";

    

    os8104: os8104@41 {

        compatible = "smsc,os8104";

        reg = <0x41>;

        master = <0>;

        bypass = <0>;

        

        gpio_reset = <&pio 8 17>;    /* PI17 */

        gpio_int = <&pio 8 16>;        /* PI16 */

        gpio_aint = <&pio 8 19>;    /* PI19 */

        gpio_error = <&pio 8 18>;    /* PI18 */

    };

};

Code:

static int os8104_probe(struct i2c_client *client, const struct i2c_device_id *id) {

    struct device_node *dn;

    int rc;

    int master = 0, bypass = 0;

    struct os8104 *priv;



    dn = of_find_node_by_name(NULL, os8104_driver.driver.name);

    if (dn == NULL) {

        return -ENODEV;

    }



    rc = of_property_read_u32(dn, "master", &master);

    pr_err("rc = %d, master = %11d\n", rc, master);

    

    rc = of_property_read_u32(dn, "bypass", &bypass);

    pr_err("rc = %d, bypass = %11d\n", rc, bypass);



    priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);



    if (!priv) {

        return -ENOMEM;

    }



    priv->adapter = to_i2c_adapter(client->dev.parent);

    priv->client = client;

    priv->mode = val;

    

    priv->gpio_reset = of_get_named_gpio(dn, "gpio_reset", 0);

    priv->gpio_int = of_get_named_gpio(dn, "gpio_int", 0);

    priv->gpio_aint = of_get_named_gpio(dn, "gpio_aint", 0);

    priv->gpio_error = of_get_named_gpio(dn, "gpio_error", 0);

    

    return 0;

}