arm64: dts: mediatek: mt8186-corsola: Fix IT6505 reset line polarity

The reset line of the IT6505 bridge chip is active low, not active high.
It was incorrectly inverted in the device tree as the implementation at
the time incorrectly inverted the polarity in its driver, due to a prior
device having an inline inverting level shifter.

Fix the polarity now while the external display pipeline is incomplete,
thereby avoiding any impact to running systems.

A matching fix for the driver should be included if this change is
backported.

Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
Cc: [email protected]
Signed-off-by: Chen-Yu Tsai <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: AngeloGioacchino Del Regno <[email protected]>

diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
index eb06b343a54061cd213fe9b62e72bffaaa0a9762..cfcc7909dfe68d983f83df7a3ee3efe76bb4a892 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
@@ -423,7 +423,7 @@
                #sound-dai-cells = <0>;
                ovdd-supply = <&mt6366_vsim2_reg>;
                pwr18-supply = <&pp1800_dpbrdg_dx>;
-               reset-gpios = <&pio 177 GPIO_ACTIVE_HIGH>;
+               reset-gpios = <&pio 177 GPIO_ACTIVE_LOW>;
 
                ports {
                        #address-cells = <1>;