linux-kernel - [PATVH v2 2/4] arm64: dts: allwinner: h6: pine: Add CPU supply regulator

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Message-Id: <20190215134937.10259-3-tiny.windzz@gmail.com>
Date:   Fri, 15 Feb 2019 08:49:35 -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: [PATVH v2 2/4] arm64: dts: allwinner: h6: pine: Add CPU supply regulator

The original pine 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-pine-h64.dts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
index bdb8470fc8dc..95c81250c2b3 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
@@ -213,8 +213,8 @@
 
 			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";
 			};
 
@@ -251,6 +251,10 @@
 	};
 };
 
+&cpu0 {
+	cpu-supply = <&reg_dcdca>;
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_ph_pins>;
-- 
2.17.0