[PATCH v2 02/15] spi: dw: update NDF while using enhanced spi mode

[Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxx>]

If the transfer of Transmit only mode is using dual/quad/octal SPI then
NDF needs to be updated with the number of data frames.
If the Transmit FIFO goes empty in-between, DWC_ssi masks the serial
clock and wait for rest of the data until the programmed amount of
frames are transferred successfully.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxx>
---
 drivers/spi/spi-dw-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 77c23772bb3d9..8c47a4d14b666 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -346,7 +346,9 @@ void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi,
 	dw_writel(dws, DW_SPI_CTRLR0, cr0);
 
 	if (cfg->tmode == DW_SPI_CTRLR0_TMOD_EPROMREAD ||
-	    cfg->tmode == DW_SPI_CTRLR0_TMOD_RO)
+	    cfg->tmode == DW_SPI_CTRLR0_TMOD_RO ||
+	    (cfg->tmode == DW_SPI_CTRLR0_TMOD_TO &&
+	     cfg->spi_frf != DW_SPI_CTRLR0_SPI_FRF_STD_SPI))
 		dw_writel(dws, DW_SPI_CTRLR1, cfg->ndf ? cfg->ndf - 1 : 0);
 
 	/* Note DW APB SSI clock divider doesn't support odd numbers */
-- 
2.30.2