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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 05/10] arm64: dts: allwinner: h5: orange-pi-zero-plus: Add CPU regulator supply
Date: Wed, 30 Jan 2019 16:41:58 +0800
Message-ID: <20190130084203.25053-6-wens@csie.org> (raw)
In-Reply-To: <20190130084203.25053-1-wens@csie.org>

The OrangePi Zero Plus uses a fixed regulator to supply the CPU cores.
The feedback resistor network can be changed by toggling a GPIO line.
This is effectively a GPIO controlled regulator that can change between
roughly 1.1V and 1.3V. The actual voltage is slightly higher. The values
used in the device tree description are based on calculations using the
resistor values from the schematics.

Cc: Hauke Mehrtens <hauke@hauke-m.de>
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.
---
 .../sun50i-h5-orangepi-zero-plus.dts          | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus.dts
index 1238de25a969..3493eea7cf29 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-orangepi-zero-plus.dts
@@ -57,6 +57,26 @@
 		enable-active-high;
 		gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* PD6 */
 	};
+
+	reg_vdd_cpux: vdd-cpux {
+		compatible = "regulator-gpio";
+		regulator-name = "vdd-cpux";
+		regulator-type = "voltage";
+		regulator-boot-on;
+		regulator-always-on;
+		regulator-min-microvolt = <1108475>;
+		regulator-max-microvolt = <1307810>;
+		regulator-ramp-delay = <50>; /* 4ms */
+		enable-gpios =  <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */
+		gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL6 */
+		gpios-states = <0x1>;
+		states = <1108475 0x0
+			  1307810 0x1>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_vdd_cpux>;
 };
 
 &ehci0 {
-- 
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 ` Chen-Yu Tsai [this message]
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 ` [PATCH 08/10] arm64: dts: allwinner: h5: orange-pi-prime: " Chen-Yu Tsai
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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