1 files changed, 77 insertions, 0 deletions
diff --git a/debian/patches/bugfix/arm/ARM-dts-sun8i-h3-add-sy8106a-to-orange-pi-plus.patch b/debian/patches/bugfix/arm/ARM-dts-sun8i-h3-add-sy8106a-to-orange-pi-plus.patch
new file mode 100644
index 000000000..1329c9390
--- /dev/null
+++ b/debian/patches/bugfix/arm/ARM-dts-sun8i-h3-add-sy8106a-to-orange-pi-plus.patch
@@ -0,0 +1,77 @@
+From: Jorik Jonker <jorik@kippendief.biz>
+Date: Sat, 29 Sep 2018 15:18:30 +0200
+Subject: ARM: dts: sun8i-h3: add sy8106a to orange pi plus
+Origin: https://git.kernel.org/linus/e98d72d98a25890308941080d3a17b4c77e3f460
+
+The Orange Pi Plus board lacks voltage scaling capabilities in its
+current form. This results in random freezes during boot when cpufreq is
+enabled, probably due to wrong voltages.
+
+This patch (more or less copy/paste from 06139c) does the following
+things on this board:
+- enable r_i2c
+- add sy8106a to the r_i2c bus
+- have the sy8106a regulate VDD of cpu
+
+Since the Orange Pi Plus has the same PMU setup as the Orange Pi PC, I
+simply took min/max/fixed/ramp from the latter DTS. In that file the
+origin of the values are described by the following comment:
+
+  "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."
+
+I have tested this on patch two Orange Pi Plus boards, by running a
+kernel with this patch and do intermettent runs of cpuburn while
+monitoring voltage, frequency and temperature. The board runs stable
+across its operatiing points while showing a reasonable (< 40C)
+temperature. My Orange Pi PC, when put to the same test, yields similar
+stable results.
+
+Signed-off-by: Jorik Jonker <jorik@kippendief.biz>
+Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
+---
+ arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts | 20 ++++++++++++++++++++
+ 1 file changed, 20 insertions(+)
+
+Index: linux/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
+===================================================================
+--- linux.orig/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
++++ linux/arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
+@@ -74,6 +74,10 @@
+ 	};
+ };
+ 
++&cpu0 {
++	cpu-supply = <&reg_vdd_cpux>;
++};
++
+ &ehci3 {
+ 	status = "okay";
+ };
+@@ -119,6 +123,22 @@
+ 	};
+ };
+ 
++&r_i2c {
++	status = "okay";
++
++	reg_vdd_cpux: regulator@65 {
++		compatible = "silergy,sy8106a";
++		reg = <0x65>;
++		regulator-name = "vdd-cpux";
++		silergy,fixed-microvolt = <1200000>;
++		regulator-min-microvolt = <1000000>;
++		regulator-max-microvolt = <1400000>;
++		regulator-ramp-delay = <200>;
++		regulator-boot-on;
++		regulator-always-on;
++	};
++};
++
+ &usbphy {
+ 	usb3_vbus-supply = <&reg_usb3_vbus>;
+ };