spi: dw: Add SPI_NO_CS to the controller mode_list

If using gpiod CS lines it must be possible to run in no-chip-select
mode, so declare SPI_NO_CS in the mode_list field for the controller.

Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

drivers/spi/spi-dw-core.c

@@ -997,7 +997,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 	dw_spi_init_mem_ops(dws);
 
 	host->use_gpio_descriptors = true;
-	host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP;
+	host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP | SPI_NO_CS;
 	if (dws->caps & DW_SPI_CAP_DFS32)
 		host->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
 	else