More RK817 questions

[Philip C]

Hello Peter.

My device, from the perspective of usb phy, OTG and regulators appears 
to be identical to this one:-

https://github.com/rockchip-linux/kernel/blob/develop-4.19/arch/arm64/boot/dts/rockchip/rk3566-rk817-tablet-k108.dts

I already have a debug console and mainline booting on it.  The single 
USB type-C port looks like it might work except that when an OTG adapter 
is plugged in the device doesn't supply 5.0V from boost as I want it to.

Looking at the mainline pinenote dts it looks different enough that it 
doesn't help me (with the knowledge that I have).  The pinenote has a 
wllsemi,wusb3801 connected to i2c3, but my device has no USB port chip 
on any i2c bus that I can see.  Instead it has a vcc5v0_host_en pin on 
GPIO3 RK_PA3 which I somewhat suspect is how the rk817 driver is 
bringing up the power rail for the OTG adapter.

The line "extcon = <&usb2phy0>;" is at line 838 in the dts that I linked 
above.  This is the line in BSP that registers the rk817 driver for 
notifications from the usb phy driver, and which seems to cause 
regulator "vcc5v0_host" to start feeding power to the USB port when an 
OTG cable is detected.

I am completely stuck.  If you can have a look and tell me what to try 
then I would be very greatful.

thanks, Philip




On 11/10/2022 09:21, Philip C wrote:
> well if you really think that so many people will be interested in my 
> incompetent ramblings ;-)
> 
> I just noticed that there are a set of pinenote dts files in mainline. 
> My bad for not noticing that.  I will have a look and see what I can 
> figure out.
> 
> thanks, PHilip