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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>
This commit is contained in:
Siarhei Siamashka 2015-10-04 21:58:48 +03:00 committed by Maxime Ripard
parent 15ada16dc7
commit a2f1a68011
1 changed files with 31 additions and 4 deletions
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35
arch/arm/boot/dts/sun4i-a10-pcduino.dts
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@ -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>;