81 lines
2.4 KiB
Diff
81 lines
2.4 KiB
Diff
From e98d72d98a25890308941080d3a17b4c77e3f460 Mon Sep 17 00:00:00 2001
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From: Jorik Jonker <jorik@kippendief.biz>
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Date: Sat, 29 Sep 2018 15:18:30 +0200
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Subject: [PATCH] ARM: dts: sun8i-h3: add sy8106a to orange pi plus
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The Orange Pi Plus board lacks voltage scaling capabilities in its
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current form. This results in random freezes during boot when cpufreq is
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enabled, probably due to wrong voltages.
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This patch (more or less copy/paste from 06139c) does the following
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things on this board:
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- enable r_i2c
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- add sy8106a to the r_i2c bus
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- have the sy8106a regulate VDD of cpu
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Since the Orange Pi Plus has the same PMU setup as the Orange Pi PC, I
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simply took min/max/fixed/ramp from the latter DTS. In that file the
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origin of the values are described by the following comment:
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"The datasheet uses 1.1V as the minimum value of VDD-CPUX,
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however both the Armbian DVFS table and the official one
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have operating points with voltage under 1.1V, and both
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DVFS table are known to work properly at the lowest
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operating point.
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Use 1.0V as the minimum voltage instead."
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I have tested this on patch two Orange Pi Plus boards, by running a
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kernel with this patch and do intermettent runs of cpuburn while
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monitoring voltage, frequency and temperature. The board runs stable
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across its operatiing points while showing a reasonable (< 40C)
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temperature. My Orange Pi PC, when put to the same test, yields similar
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stable results.
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Signed-off-by: Jorik Jonker <jorik@kippendief.biz>
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Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
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---
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arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts | 20 ++++++++++++++++++++
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1 file changed, 20 insertions(+)
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diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
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index b403e5d787cb..ac8438c2cff1 100644
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--- a/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
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+++ b/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
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@@ -74,6 +74,10 @@
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};
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};
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+&cpu0 {
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+ cpu-supply = <®_vdd_cpux>;
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+};
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+
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&ehci3 {
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status = "okay";
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};
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@@ -119,6 +123,22 @@
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};
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};
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+&r_i2c {
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+ status = "okay";
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+
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+ reg_vdd_cpux: regulator@65 {
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+ compatible = "silergy,sy8106a";
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+ reg = <0x65>;
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+ regulator-name = "vdd-cpux";
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+ silergy,fixed-microvolt = <1200000>;
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+ regulator-min-microvolt = <1000000>;
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+ regulator-max-microvolt = <1400000>;
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+ regulator-ramp-delay = <200>;
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+ regulator-boot-on;
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+ regulator-always-on;
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+ };
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+};
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+
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&usbphy {
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usb3_vbus-supply = <®_usb3_vbus>;
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};
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--
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2.20.1
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