From: Chris Morgan <macromorgan@xxxxxxxxxxx>
When writing a battery driver, I noticed that the USB voltage was ~3.7V
while running off of battery on a mainline kernel. After consulting the
schematics for the Odroid Go Advance, it appears that the BOOST
regulator is involved in the process of powering the USB host. Power
for the USB host goes from the vccsys regulator into the PMIC, then out
from the PMIC BOOST regulator into the FC9516A (which is controlled by
GPIO), which then feeds power into the USB host. I also added the
vcc_host regulator as the phy-supply for the host USB port, which
accurately describes the hardware. I named the regulator usb_midu
because on the datasheet the pin is described as "MIDU/BOOST - middle
point of USB power supply / boost output". Making these changes solved
the USB power issue on battery and I'm now reading approximately 5V.
Signed-off-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
index 7fc674a99a6c..79d2f86ab46d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
@@ -207,7 +207,7 @@ vcc_host: vcc_host {
gpio = <&gpio0 RK_PB7 GPIO_ACTIVE_HIGH>;
enable-active-high;
regulator-always-on;
- vin-supply = <&vccsys>;
+ vin-supply = <&usb_midu>;
};
};
@@ -311,6 +311,7 @@ rk817: pmic@20 {
vcc5-supply = <&vccsys>;
vcc6-supply = <&vccsys>;
vcc7-supply = <&vccsys>;
+ vcc8-supply = <&vccsys>;
regulators {
vdd_logic: DCDC_REG1 {
@@ -460,6 +461,14 @@ regulator-state-mem {
regulator-suspend-microvolt = <3000000>;
};
};
+
+ usb_midu: BOOST {
+ regulator-name = "usb_midu";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5400000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
};
rk817_codec: codec {
@@ -525,6 +534,7 @@ &u2phy {
status = "okay";
u2phy_host: host-port {
+ phy-supply = <&vcc_host>;
status = "okay";
};
--
2.25.1
