spi-bitbang has to call the chipselect function on the ath79 SPI driver in order to communicate with the SPI slave device, as the ath79 SPI driver has three dedicated chipselect lines but can also be used with GPIOs for the CS lines. Fixes commit 4a07b8bcd503 ("spi: bitbang: Make chipselect callback optional") Signed-off-by: David Bauer <mail@xxxxxxxxxxxxxxx> --- drivers/spi/spi-ath79.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index eb9a243e9526..436327fb58de 100644 --- a/drivers/spi/spi-ath79.c +++ b/drivers/spi/spi-ath79.c @@ -158,6 +158,7 @@ static int ath79_spi_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); master->setup = spi_bitbang_setup; master->cleanup = spi_bitbang_cleanup; + master->flags = SPI_MASTER_GPIO_SS; if (pdata) { master->bus_num = pdata->bus_num; master->num_chipselect = pdata->num_chipselect; -- 2.30.1