* [PATCH] arm64: dts: mediatek: mt8183-kukui: Add supply for SPI NOR flash
@ 2026-07-02 8:37 Chen-Yu Tsai
2026-07-02 9:22 ` AngeloGioacchino Del Regno
0 siblings, 1 reply; 2+ messages in thread
From: Chen-Yu Tsai @ 2026-07-02 8:37 UTC (permalink / raw)
To: Matthias Brugger, AngeloGioacchino Del Regno
Cc: Chen-Yu Tsai, linux-mediatek, devicetree, linux-arm-kernel,
linux-kernel
The SPI NOR flash is powered from the always on 1.8V power rail through
a load switch that is controlled by the security chip.
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index b8d261b375d4..ed552f023cb4 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -980,6 +980,8 @@ w25q64dw: flash@0 {
compatible = "winbond,w25q64dw", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <25000000>;
+ /* Power actually controlled by security chip */
+ vcc-supply = <&pp1800_alw>;
};
};
--
2.55.0.rc0.799.gd6f94ed593-goog
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2026-07-02 8:37 [PATCH] arm64: dts: mediatek: mt8183-kukui: Add supply for SPI NOR flash Chen-Yu Tsai
2026-07-02 9:22 ` AngeloGioacchino Del Regno
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