PIN_BIT_ACLKR
bit = PIN_BIT_ACLKR;
set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);