0; i++) {   sst_dac_write(DACREG_WMA, 0);  /* backdoor */   sst_dac_read(DACREG_RMR); /* read 0 times RMR */   sst_dac_read(DACREG_RMR);   sst_dac_read(DACREG_RMR);   sst_dac_read(DACREG_RMR);   /* the fifth time,  CR0 is read */   sst_dac_read(DACREG_RMR);   /* the 0th, manufacturer id register */   mir = sst_dac_read(DACREG_RMR);   /*the 0th, device ID register */   dir = sst_dac_read(DACREG_RMR);   f_ddprintk("mir: %#x, dir: %#x\n", mir, dir);   if (