linux-kernel - [PATCH v3 1/4] arm64: dts: allwinner: h6: orangepi: Add CPU supply regulator

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Date:   Fri, 15 Feb 2019 10:53:35 -0500
From:   Yangtao Li <tiny.windzz@...il.com>
To:     maxime.ripard@...tlin.com, wens@...e.org, robh+dt@...nel.org,
        mark.rutland@....com
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH v3 1/4] arm64: dts: allwinner: h6: orangepi: Add CPU supply regulator

The original orangepi use the dcdca to supply the CPU cores. According
to the axp805 spec, the range of dcdca is 0.6 to 1.1v, 1.12 to 1.52v.
In order to support more CPU frequency, slightly increase the voltage
maximum and minimum.

In fact, in sunxi's sdk, the actual minimum and maximum voltage of the
cpu is smaller or larger than the datasheet.

For some better quality ic, the minimum voltage can be smaller.
For some poor quality ic, the maximum voltage needs to be increased a
little.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
index b2526dac2fcf..e7aebaf91ede 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
@@ -159,8 +159,8 @@
 
 			reg_dcdca: dcdca {
 				regulator-always-on;
-				regulator-min-microvolt = <810000>;
-				regulator-max-microvolt = <1080000>;
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1160000>;
 				regulator-name = "vdd-cpu";
 			};
 
@@ -191,6 +191,10 @@
 	};
 };
 
+&cpu0 {
+	cpu-supply = <&reg_dcdca>;
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_ph_pins>;
-- 
2.17.0