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Subject[PATCH 04/10] arm64: dts: allwinner: h5: nanopi-neo2: Add CPU regulator supply
Date
The Nanopi Neo 2 uses a fixed regulator to supply the CPU cores. The
feedback resistor network can be changed by toggling a GPIO line. This
is effectively a GPIO controlled regulator that can change between 1.1V
and 1.3V.

Cc: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

---

This patch is based on the schematics and has not been tested on an
actual board.
---
.../dts/allwinner/sun50i-h5-nanopi-neo2.dts | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
index cc268a69786c..08ffdfb78137 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts
@@ -99,6 +99,26 @@
gpio = <&r_pio 0 2 GPIO_ACTIVE_HIGH>; /* PL2 */
status = "okay";
};
+
+ reg_vdd_cpux: vdd-cpux {
+ compatible = "regulator-gpio";
+ regulator-name = "vdd-cpux";
+ regulator-type = "voltage";
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-min-microvolt = <1100000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-ramp-delay = <50>; /* 4ms */
+ enable-gpios = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */
+ gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL6 */
+ gpios-states = <0x1>;
+ states = <1100000 0x0
+ 1300000 0x1>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <&reg_vdd_cpux>;
};

&ehci0 {
--
2.20.1
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