[linux-sunxi] [PATCH 8/9] ARM: dts: sun7i: bananapi-m1-plus: Add PMIC regulators and OPPs for cpufreq

[Chen-Yu Tsai]

The Bananapi M1+, like other Allwinner A20 based boards, uses the AXP209
PMIC to supply its power. The vendor FEX file's DVFS table suggests the
board's CPU power rail has a voltage drop of 25 ~ 50 mV.

Add the PMIC regulator nodes and copy the DVFS table from the FEX file.

Signed-off-by: Chen-Yu Tsai <w...@csie.org>
---
 arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts | 48 ++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts 
b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
index ba5bca0fe997..7bb418bd1b6e 100644
--- a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
+++ b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
@@ -105,6 +105,22 @@
        status = "okay";
 };
 
+&cpu0 {
+       cpu-supply = <&reg_dcdc2>;
+
+       /* The custom DVFS table suggests a voltage drop of 25 ~ 50 mV */
+       operating-points = <
+               /* kHz    uV */
+               1080000 1450000
+               912000  1425000
+               864000  1350000
+               720000  1250000
+               528000  1150000
+               312000  1100000
+               144000  1050000
+               >;
+};
+
 &ehci0 {
        status = "okay";
 };
@@ -132,13 +148,9 @@
        status = "okay";
 
        axp209: pmic@34 {
-               compatible = "x-powers,axp209";
                reg = <0x34>;
                interrupt-parent = <&nmi_intc>;
                interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
-
-               interrupt-controller;
-               #interrupt-cells = <1>;
        };
 };
 
@@ -222,6 +234,34 @@
        };
 };
 
+#include "axp209.dtsi"
+
+&reg_dcdc2 {
+       /* The custom DVFS table suggests a voltage drop of 25 ~ 50 mV */
+       regulator-always-on;
+       regulator-min-microvolt = <1050000>;
+       regulator-max-microvolt = <1450000>;
+       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>;
-- 
2.8.1

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