LP55xx_EXEC_ENGn_SHIFT
exec |= LP55xx_EXEC_RUN_ENG << LP55xx_EXEC_ENGn_SHIFT(i, cfg->reg_exec.shift);
#define LP55xx_EXEC_ENGn_MASK(n, shift) (LP55xx_EXEC_ENG_MASK << LP55xx_EXEC_ENGn_SHIFT(n, shift))