SPI_BIT_LENGTH
command1 |= SPI_BIT_LENGTH(bits_per_word - 1);
command1 &= ~SPI_BIT_LENGTH(~0);
command1 |= SPI_BIT_LENGTH(bits_per_word - 1);
command |= SPI_BIT_LENGTH(t->bits_per_word - 1);
command &= ~SPI_BIT_LENGTH(~0);
command |= SPI_BIT_LENGTH(t->bits_per_word - 1);