mcbsp clock activation

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Hello all;

    I have some problems with my mcbsp again about its region and
memory allocation. I wrote like this.

static int mcbsp_drv_init (void)
{
  int ret;
  int chk;

  printk("mcbsp_drv registering init start... \n");

  ret = register_chrdev(MCBSP_DRV_MAJOR,"mcbsp_drv",&
mcbsp_drv_fops); /

  chk=check_region (OMAP34XX_MCBSP1_BASE,0x64);
  printk("check is :%d",chk);
  chk=request_region (OMAP34XX_MCBSP1_BASE,0x64,"mcbsp_drv");
  printk("request is :%d",chk);

  chk=check_mem_region (OMAP34XX_MCBSP1_BASE,0x64);
  printk("check memory is :%d",chk);
  chk=request_mem_region (OMAP34XX_MCBSP1_BASE,0x64,"mcbsp_drv");
  printk("request memory is :%d",chk);

then call
omap_mcbsp_request(OMAP_MCBSP1);

but i couldnot communicate with my mcbsp. (i couldnot see any clock
activation on oscilloscope). How can i handle it?

Fatih