It was <2020-08-19 śro 14:39>, when Krzysztof Kozlowski wrote:

On Wed, Aug 19, 2020 at 02:32:02PM +0200, Łukasz Stelmach wrote:

quoted

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>

Add a quirk - why?

Because stuff does not work without it and works with it and it is
turned on for other SoCs which have simmilar SPI HW.

There is here no commit msg, no explanation.

As I wrote in the cover letter, this and previous commits make things
work on Exynos3250 (ARTIK5 precisely). I can't explain why. I read
everything I could about this HW and there were no details about
automatic CS handling other than how to turn it on and off.

quoted

---
 drivers/spi/spi-s3c64xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index fb5e2ba4b6b9..8fe44451d303 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c

@@ -1372,6 +1372,7 @@ static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
 	.tx_st_done	= 25,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
+	.quirks		=  S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
 static struct s3c64xx_spi_port_config exynos7_spi_port_config = {

-- 
2.26.2

-- 
Łukasz Stelmach
Samsung R&D Institute Poland
Samsung Electronics