[PATCH v2 13/16] arm64: dts: mediatek: mt8195-cherry: Add supply for SPI NOR flash

[Chen-Yu Tsai <wenst@chromium.org>]

The SPI NOR flash is powered by a separate "always on" 1.8V LDO
regulated power rail. This rail is fed from the system 3.3V rail.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Changes since v1:
- New patch
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index dc1ba143ccf2..62e2d7616f20 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -47,6 +47,17 @@ memory@40000000 {
 		reg = <0 0x40000000 0 0x80000000>;
 	};
 
+	/* system critical LDO 1.8V power rail */
+	pp1800_ldo_z2: regulator-pp1800-ldo-z2 {
+		compatible = "regulator-fixed";
+		regulator-name = "pp1800_ldo_z2";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&pp3300_z2>;
+	};
+
 	pp3300_disp_x: regulator-pp3300-disp-x {
 		compatible = "regulator-fixed";
 		regulator-name = "pp3300_disp_x";
@@ -762,6 +773,7 @@ flash@0 {
 		spi-max-frequency = <52000000>;
 		spi-rx-bus-width = <2>;
 		spi-tx-bus-width = <2>;
+		vcc-supply = <&pp1800_ldo_z2>;
 	};
 };
 
-- 
2.54.0.545.g6539524ca2-goog