The TPS65217C used on the boneblack defaults to 1.5v on startup for dcdc1_reg.
While 1.35v ddr3 memory is actually used. This was discovered by a user during
a schematic review of his beaglebone-black clone, a u-boot patch will also also
be submitted.
Signed-off-by: Robert Nelson <robertcnelson@xxxxxxxxx>
CC: Tony Lindgren <tony@xxxxxxxxxxx>
CC: Vagrant Cascadian <vagrant@xxxxxxxxxx>
---
arch/arm/boot/dts/am335x-boneblack.dts | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/boot/dts/am335x-boneblack.dts b/arch/arm/boot/dts/am335x-boneblack.dts
index 901739f..e7c8999 100644
--- a/arch/arm/boot/dts/am335x-boneblack.dts
+++ b/arch/arm/boot/dts/am335x-boneblack.dts
@@ -15,6 +15,13 @@
compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
};
+&dcdc1_reg {
+ /* TPS65217C defaults to 1.5v on powerup while 1.35v DDR3 is used */
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-boot-on;
+};
+
&ldo3_reg {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
--
2.1.1
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