MT7621_SPI_MASTER
reg = mt7621_spi_read(rs, MT7621_SPI_MASTER);
mt7621_spi_write(rs, MT7621_SPI_MASTER, reg);
host = mt7621_spi_read(rs, MT7621_SPI_MASTER);
mt7621_spi_write(rs, MT7621_SPI_MASTER, host);