CC3220S-LAUNCHXL: I2S, how to leave McACLKX unassigned so that pin could be used as a GPIO?

Greetings!

In out design we are using almost all of the CC3220S available pins. Our I2S peripheral does not require the McACLKX signal so we want to re purpose that pin as a GPIO. When we try to remove that pin definition the code compiles fine but then fails at runtime. How can we go about it?

Thanks,

Dan

Original setting CC3220S_LAUNCHXL.c:

--

/*
 *  =============================== I2S ===============================
 */
#include <ti/drivers/I2S.h>
#include <ti/drivers/i2s/I2SCC32XXDMA.h>

I2SCC32XXDMA_Object i2sCC3220SObjects[CC3220S_LAUNCHXL_I2SCOUNT];

const I2SCC32XXDMA_HWAttrsV1 i2sCC3220SHWAttrs[CC3220S_LAUNCHXL_I2SCOUNT] = {
    {
        .baseAddr = I2S_BASE,
        .intNum = INT_I2S,
        .intPriority = (~0),
        .rxChannelIndex = UDMA_CH4_I2S_RX,
        .txChannelIndex = UDMA_CH5_I2S_TX,
        .xr0Pin = I2SCC32XXDMA_PIN_50_McAXR0,
        .xr1Pin = I2SCC32XXDMA_PIN_60_McAXR1,
        .clkxPin = I2SCC32XXDMA_PIN_62_McACLKX,
        .clkPin = I2SCC32XXDMA_PIN_53_McACLK,
        .fsxPin = I2SCC32XXDMA_PIN_15_McAFSX,

    }
};

--

Commented out CC3220S_LAUNCHXL.c:

--

/*
 *  =============================== I2S ===============================
 */
#include <ti/drivers/I2S.h>
#include <ti/drivers/i2s/I2SCC32XXDMA.h>

I2SCC32XXDMA_Object i2sCC3220SObjects[CC3220S_LAUNCHXL_I2SCOUNT];

const I2SCC32XXDMA_HWAttrsV1 i2sCC3220SHWAttrs[CC3220S_LAUNCHXL_I2SCOUNT] = {
    {
        .baseAddr = I2S_BASE,
        .intNum = INT_I2S,
        .intPriority = (~0),
        .rxChannelIndex = UDMA_CH4_I2S_RX,
        .txChannelIndex = UDMA_CH5_I2S_TX,
        .xr0Pin = I2SCC32XXDMA_PIN_50_McAXR0,
        .xr1Pin = I2SCC32XXDMA_PIN_60_McAXR1,
        //.clkxPin = I2SCC32XXDMA_PIN_62_McACLKX,
        .clkPin = I2SCC32XXDMA_PIN_53_McACLK,
        .fsxPin = I2SCC32XXDMA_PIN_15_McAFSX,

    }
};

--