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From: Chen-Yu Tsai <wens@csie.org>
To: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: devicetree@vger.kernel.org,
	Sergey Matyukevich <geomatsi@gmail.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Chen-Yu Tsai <wens@csie.org>,
	linux-kernel@vger.kernel.org, Emmanuel Vadot <manu@freebsd.org>,
	linux-sunxi@googlegroups.com,
	Jagan Teki <jagan@amarulasolutions.com>,
	Hauke Mehrtens <hauke@hauke-m.de>,
	linux-arm-kernel@lists.infradead.org,
	Icenowy Zheng <icenowy@aosc.io>
Subject: [PATCH 08/10] arm64: dts: allwinner: h5: orange-pi-prime: Add CPU regulator supply
Date: Wed, 30 Jan 2019 16:42:01 +0800
Message-ID: <20190130084203.25053-9-wens@csie.org> (raw)
In-Reply-To: <20190130084203.25053-1-wens@csie.org>

The OrangePi Prime uses a Silergy SY8106A regulator to supply the CPU
cores. The fixed voltage when I2C programmed regulation is not in action
is slightly higher than 1.1V. The value in the device tree description
is based on calculations of the resistor values from the schematics.

Cc: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

---

This patch is based on the schematics and has not been tested on an
actual board.
---
 .../allwinner/sun50i-h5-orangepi-prime.dts    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-prime.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-prime.dts
index b75ca4d7d001..e866a0734bb3 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-prime.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-prime.dts
@@ -139,6 +139,10 @@
 	status = "okay";
 };
 
+&cpu0 {
+	cpu-supply = <&reg_vdd_cpux>;
+};
+
 &de {
 	status = "okay";
 };
@@ -222,6 +226,30 @@
 	status = "okay";
 };
 
+&r_i2c {
+	status = "okay";
+
+	reg_vdd_cpux: regulator@65 {
+		compatible = "silergy,sy8106a";
+		reg = <0x65>;
+		regulator-name = "vdd-cpux";
+		silergy,fixed-microvolt = <1108474>;
+		/*
+		 * The datasheet uses 1.1V as the minimum value of VDD-CPUX,
+		 * however both the Armbian DVFS table and the official one
+		 * have operating points with voltage under 1.1V, and both
+		 * DVFS table are known to work properly at the lowest
+		 * operating point.
+		 *
+		 * Use 1.0V as the minimum voltage instead.
+		 */
+		regulator-min-microvolt = <1000000>;
+		regulator-max-microvolt = <1300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;
-- 
2.20.1


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  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-30  8:41 [PATCH 00/10] arm64: dts: allwinner: h5: Enable CPU DVFS (cpufreq) Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 01/10] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 02/10] ARM: dts: bananapi-m2-plus: Add CPU supply regulator Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 03/10] arm64: dts: allwinner: h5: Hook up cpu regulator supplies Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 04/10] arm64: dts: allwinner: h5: nanopi-neo2: Add CPU regulator supply Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 05/10] arm64: dts: allwinner: h5: orange-pi-zero-plus: " Chen-Yu Tsai
2019-01-30  8:41 ` [PATCH 06/10] arm64: dts: allwinner: h5: orange-pi-zero-plus2: " Chen-Yu Tsai
2019-01-30  8:42 ` [PATCH 07/10] arm64: dts: allwinner: h5: orange-pi-pc2: " Chen-Yu Tsai
2019-01-30  8:42 ` Chen-Yu Tsai [this message]
2019-01-30  8:42 ` [PATCH 09/10] arm64: dts: allwinner: h5: Add clock to CPU cores Chen-Yu Tsai
2019-01-30  8:42 ` [PATCH 10/10] arm64: dts: allwinner: h5: Add CPU Operating Performance Points table Chen-Yu Tsai
2019-01-30  9:29   ` Maxime Ripard
2019-01-30  9:41     ` Chen-Yu Tsai
2019-01-30  9:59       ` Maxime Ripard
2019-01-31  3:28       ` Chen-Yu Tsai
2019-09-02 14:03 ` [PATCH 00/10] arm64: dts: allwinner: h5: Enable CPU DVFS (cpufreq) Ondřej Jirman

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