Commit b8999973 authored by Fin Maaß's avatar Fin Maaß Committed by Mahesh Mahadevan
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drivers: spi: litex: add flush of rx buffer 



this flushes the rx buffer before the
start of a new transaction. It is needed
because the litex bios is not always
reading the rx buffer.

Signed-off-by: default avatarFin Maaß <f.maass@vogl-electronic.com>
parent 6261e2a6

drivers/spi/spi_litex_litespi.c

+7 −0
Original line number Diff line number Diff line
@@ -152,6 +152,13 @@ static int spi_litex_xfer(const struct device *dev, const struct spi_config *con 


	litex_write32(BIT(config->slave), dev_config->core_master_cs_addr);



	/* Flush RX buffer */

	while ((litex_read8(dev_config->core_master_status_addr) &

		BIT(SPIFLASH_CORE_MASTER_STATUS_RX_READY_OFFSET))) {

		rxd = litex_read32(dev_config->core_master_rxtx_addr);

		LOG_DBG("flushed rxd: 0x%x", rxd);

	}



	do {

		len = MIN(spi_context_max_continuous_chunk(ctx), dev_config->core_master_rxtx_size);

		if (len != old_len) {

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