Unverified Commit b40af618 authored by Robert Marko's avatar Robert Marko Committed by Mark Brown
Browse files

spi: qup: support using GPIO as chip select line 



Most of the device with QUP SPI adapter are actually using GPIO-s for
chip select.

However, this stopped working after ("spi: Retire legacy GPIO handling")
as it introduced a check on ->use_gpio_descriptors flag and since spi-qup
driver does not set the flag it meant that all of boards using GPIO-s and
with QUP adapter SPI devices stopped working.

So, to enable using GPIO-s again set ->use_gpio_descriptors to true and
populate ->max_native_cs.

Fixes: f48dc6b9 ("spi: Retire legacy GPIO handling")
Signed-off-by: default avatarRobert Marko <robert.marko@sartura.hr>
Cc: luka.perkov@sartura.hr
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221006194819.1536932-1-robert.marko@sartura.hr


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 6a43cd02

drivers/spi/spi-qup.c

+2 −0
Original line number Diff line number Diff line
@@ -1057,6 +1057,8 @@ static int spi_qup_probe(struct platform_device *pdev) 
	else

		master->num_chipselect = num_cs;



	master->use_gpio_descriptors = true;

	master->max_native_cs = SPI_NUM_CHIPSELECTS;

	master->bus_num = pdev->id;

	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;

	master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);