Free electrons course wii nunchuk and BBB i2c connection DTS

[okash.khawaja@gmail.com (Okash Khawaja)]

Hi,

In this free-electrons course http://free-electrons.com/training/kernel/
it talks about setting up i2c between beagle bone black and nintendo wii
nunchuk with UEXT connector. To do that I created the DTS which I have 
put at the end of this email. It doesn't seem to be working. When I send
some bytes to the device which is on i2c1, I get "omap_i2c 4802a000.i2c:
timeout waiting for bus ready" message.

Feel free to ask details. Any help will be appreciated.

Thanks,
Okash

/dts-v1/;

#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"

/ {
        model = "TI AM335x BeagleBone Black";
        compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
};

&i2c1 {
        status = "okay";
        clock-frequency = <100000>;

        nunchuk at 52 {
                compatible = "nintendo,nunchuk";
                reg = <0x52>;
        };
};

&am33xx_pinmux {
        pinctrl-names = "default";
        pinctrl-0 = <&i2c1_pins>;
        i2c1_pins: pinmux_i2c1_pins {
                pinctrl_single,pins = <
                        0x158 (PIN_INPUT_PULLUP | MUX_MODE2) /* spi0_d1.i2c1_sda */
                        0x15c (PIN_INPUT_PULLUP | MUX_MODE2) /* spi0_cs0.i2c1_scl */
                >;
        };
};