SUN4I_INT_CTL_REG
u32 reg = sun4i_spi_read(sspi, SUN4I_INT_CTL_REG);
sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, reg);
u32 reg = sun4i_spi_read(sspi, SUN4I_INT_CTL_REG);
sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, reg);
sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, 0);