On Thu, 16 Sep 2021 14:09:38 -0500, Chris Morgan wrote:
> 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 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.
>
> [...]
Applied, thanks!
[1/1] arm64: dts: rockchip: Correct regulator for USB host
commit: 4b90e34d9a3ba25a62e4ea42d63fbe6c7fb11ed1
Best regards,
--
Heiko Stuebner <heiko@xxxxxxxxx>
