On 04.03.2020 15:37, Marek Szyprowski wrote:

Recent changes in the SPI core and the SPI-GPIO driver revealed that the GPIO lines for the LD9040 LCD controller on the UniversalC210 board are defined incorrectly. Fix the polarity for those lines to match the old behavior and hardware requirements to fix LCD panel operation with recent kernels.

CC: stable@vger.kernel.org # 5.0+ Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com

Reviewed-by: Andrzej Hajda a.hajda@samsung.com

-- Regards Andrzej

---

arch/arm/boot/dts/exynos4210-universal_c210.dts | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts index a1bdf7830a87..9dda6bdb9253 100644 --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts @@ -115,7 +115,7 @@ gpio-sck = <&gpy3 1 GPIO_ACTIVE_HIGH>; gpio-mosi = <&gpy3 3 GPIO_ACTIVE_HIGH>; num-chipselects = <1>;

• cs-gpios = <&gpy4 3 GPIO_ACTIVE_HIGH>;
  

• cs-gpios = <&gpy4 3 GPIO_ACTIVE_LOW>;
  

lcd@0 { compatible = "samsung,ld9040"; @@ -124,8 +124,6 @@ vci-supply = <&ldo17_reg>; reset-gpios = <&gpy4 5 GPIO_ACTIVE_HIGH>; spi-max-frequency = <1200000>;

• 	spi-cpol;
  

• 	spi-cpha;
  power-on-delay = <10>;
  reset-delay = <10>;
  panel-width-mm = <90>;