STM32H7_SPI_RXDR
.rx = { STM32H7_SPI_RXDR },
.rx = { STM32H7_SPI_RXDR },
*rx_buf32 = readl_relaxed(spi->base + STM32H7_SPI_RXDR);
*rx_buf16 = readw_relaxed(spi->base + STM32H7_SPI_RXDR);
*rx_buf8 = readb_relaxed(spi->base + STM32H7_SPI_RXDR);