spi: tegra210-quad: set half duplex flag

Tegra QSPI controller only supports half duplex transfers.
Set half duplex constrain flag.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/20230223162635.19747-3-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index 9f35661..258e3b8 100644 (file)
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -1532,6 +1532,7 @@ static int tegra_qspi_probe(struct platform_device *pdev)
        master->mode_bits = SPI_MODE_0 | SPI_MODE_3 | SPI_CS_HIGH |
                            SPI_TX_DUAL | SPI_RX_DUAL | SPI_TX_QUAD | SPI_RX_QUAD;
        master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) | SPI_BPW_MASK(8);
+       master->flags = SPI_CONTROLLER_HALF_DUPLEX;
        master->setup = tegra_qspi_setup;
        master->transfer_one_message = tegra_qspi_transfer_one_message;
        master->num_chipselect = 1;