MIN_WORD_LEN
word_len = (bits_per_word - MIN_WORD_LEN) & WORD_LEN_MSK;
if (!(mas->cur_bits_per_word % MIN_WORD_LEN)) {
peripheral.word_len = xfer->bits_per_word - MIN_WORD_LEN;
if (!(xfer->bits_per_word % MIN_WORD_LEN))