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authorMarek Szyprowski <m.szyprowski@samsung.com>2020-03-04 17:37:26 +0300
committerKrzysztof Kozlowski <krzk@kernel.org>2020-03-11 13:03:03 +0300
commit32a1671ff8e84f0dfff3a50d4b2091d25e91f5e2 (patch)
tree35b19bb07b53041b8fea1cd2b5b2fd88a5db03e1 /arch/arm/boot/dts/exynos4210-universal_c210.dts
parent604e8b79c8864a308a459689c7054a508d52841f (diff)
downloadlinux-32a1671ff8e84f0dfff3a50d4b2091d25e91f5e2.tar.xz
ARM: dts: exynos: Fix polarity of the LCD SPI bus on UniversalC210 board
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.x Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Diffstat (limited to 'arch/arm/boot/dts/exynos4210-universal_c210.dts')
-rw-r--r--arch/arm/boot/dts/exynos4210-universal_c210.dts4
1 files changed, 1 insertions, 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>;