ARM: dts: sun4i: Add AXP209 PMU regulators for pcDuino1/2

This allows voltage-scaling with cpufreq-dt. The reliability of
voltage-scaling has been checked by reducing the voltage of all
operating points by 0.025V (for extra safety headroom) and running
libjpeg-turbo decoding tests on 5 pcDuino2 boards. It means that
the standard sun4i voltages should be perfectly fine too.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun4i-a10-pcduino.dts b/arch/arm/boot/dts/sun4i-a10-pcduino.dts
index 4e3e1b9d8217e356c9c11953ff84eb2eee4f48ad..c882421d08ff4f4def8ceb1d3f59fa446076730b 100644 (file)
--- a/arch/arm/boot/dts/sun4i-a10-pcduino.dts
+++ b/arch/arm/boot/dts/sun4i-a10-pcduino.dts
@@ -104,6 +104,10 @@
        };
 };
 
+&cpu0 {
+       cpu-supply = <&reg_dcdc2>;
+};
+
 &ehci0 {
        status = "okay";
 };
@@ -129,12 +133,8 @@
        status = "okay";
 
        axp209: pmic@34 {
-               compatible = "x-powers,axp209";
                reg = <0x34>;
                interrupts = <0>;
-
-               interrupt-controller;
-               #interrupt-cells = <1>;
        };
 };
 
@@ -188,6 +188,33 @@
        status = "okay";
 };
 
+#include "axp209.dtsi"
+
+&reg_dcdc2 {
+       regulator-always-on;
+       regulator-min-microvolt = <1000000>;
+       regulator-max-microvolt = <1400000>;
+       regulator-name = "vdd-cpu";
+};
+
+&reg_dcdc3 {
+       regulator-always-on;
+       regulator-min-microvolt = <1000000>;
+       regulator-max-microvolt = <1400000>;
+       regulator-name = "vdd-int-dll";
+};
+
+&reg_ldo1 {
+       regulator-name = "vdd-rtc";
+};
+
+&reg_ldo2 {
+       regulator-always-on;
+       regulator-min-microvolt = <3000000>;
+       regulator-max-microvolt = <3000000>;
+       regulator-name = "avcc";
+};
+
 &uart0 {
        pinctrl-names = "default";
        pinctrl-0 = <&uart0_pins_a>;