In current implementation we get -ETIMEDOUT error when we try to use
transmit only mode (SPI_TMOD_TO)
This happens because in transmit only mode input FIFO never gets any data
which breaks our logic in dw_reader(): we are waiting until RX data will be
ready in dw_reader, but this newer happens, so we return with error.
Fix that by using SPI_TMOD_TR instead of SPI_TMOD_TO which allows to use
RX FIFO.
Signed-off-by: Eugeniy Paltsev <eugeniy.palt...@synopsys.com>
---
Changes v1->v2:
* None.
drivers/spi/designware_spi.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c
index 5e196b21c9..3296441606 100644
--- a/drivers/spi/designware_spi.c
+++ b/drivers/spi/designware_spi.c
@@ -361,7 +361,11 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int
bitlen,
else if (rx)
priv->tmode = SPI_TMOD_RO;
else
- priv->tmode = SPI_TMOD_TO;
+ /*
+ * In transmit only mode (SPI_TMOD_TO) input FIFO never gets
+ * any data which breaks our logic in poll_transfer() above.
+ */
+ priv->tmode = SPI_TMOD_TR;
cr0 &= ~SPI_TMOD_MASK;
cr0 |= (priv->tmode << SPI_TMOD_OFFSET);
--
2.14.3
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