CPOL
conf |= CPOL;
CPHA | CPOL | RXADJ |
csr |= SPI_BIT(CPOL);
new_polarity = (asd->csr & SPI_BIT(CPOL)) != 0;
u32 cpol = (spi->mode & SPI_CPOL) ? SPI_BIT(CPOL) : 0;
if ((csr ^ cpol) & SPI_BIT(CPOL))
csr ^ SPI_BIT(CPOL));
writel((spi_slv->mode & SPI_CPOL) ? CPOL : 0, se->base + SE_SPI_CPOL);